WO2022083770A1 - Procédé de surveillance d'un canal physique de commande de liaison descendante et dispositif associé - Google Patents

Procédé de surveillance d'un canal physique de commande de liaison descendante et dispositif associé Download PDF

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Publication number
WO2022083770A1
WO2022083770A1 PCT/CN2021/125907 CN2021125907W WO2022083770A1 WO 2022083770 A1 WO2022083770 A1 WO 2022083770A1 CN 2021125907 W CN2021125907 W CN 2021125907W WO 2022083770 A1 WO2022083770 A1 WO 2022083770A1
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pdcch
slot
configuration
repetition
dci
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PCT/CN2021/125907
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English (en)
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WO2022083770A9 (fr
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Chiahung Wei
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FG Innovation Company Limited
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present disclosure is generally related to wireless communications and more specifically, to a method of monitoring a Physical Downlink Control Channel (PDCCH) and a related device.
  • PDCCH Physical Downlink Control Channel
  • next-generation wireless communication system such as the fifth-generation (5G) New Radio (NR)
  • 5G fifth-generation
  • NR New Radio
  • the UE monitors a PDCCH for a downlink (DL) data reception or a possible assignment, the assignment represented as a UE specific downlink control information (DCI) .
  • a DCI is extracted from the PDCCH via blind decoding.
  • the DCI may indicate a DL data reception on a physical downlink shared channel (PDSCH) .
  • the DCI with cyclic redundancy check (CRC) bits may be scrambled by a UE specific Radio Network Temporary Identity (RNTI) (e.g., Cell Radio Network Temporary Identifier (C-RNTI) ) .
  • RNTI Radio Network Temporary Identity
  • PUSCH physical uplink shared channel
  • PUSCH physical uplink shared channel
  • the DCI indicates time and frequency locations of the PUSCH (e.g., UL grant) . Therefore, the UE may perform a corresponding UL data (e.g., Transport Block (TB) ) transmission on the PUSCH based on the UL grant indicated by the DCI.
  • a corresponding UL data e.g., Transport Block (TB)
  • the DCI may also indicate the Hybrid Automatic Repeat Request (HARQ) feedback (e.g., HARQ acknowledgement (HARQ-ACK) ) corresponding to a DL data . That is, the DCI indicates not only time and frequency locations of the PDSCH but also the timing that the UE should perform the HARQ-ACK transmission corresponding to the DL data reception.
  • HARQ Hybrid Automatic Repeat Request
  • HARQ-ACK HARQ acknowledgement
  • FIG. 1 is a schematic diagram illustrating a HARQ-ACK feedback corresponding to a PDSCH scheduling, according to a related art.
  • Two parameters K 0 and K 1 as illustrated in FIG. 1 had been introduced in NR Release 15 (Rel-15) .
  • the K 0 was defined as a slot offset between a slot containing a PDCCH that carries a DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 1 was defined as a slot offset between the slot containing the PDSCH and the slot where the UE needs to perform the HARQ-ACK feedback.
  • the values of the K 0 and K 1 applied by the UE may both be indicated by a DCI. It is noted that, as illustrated in FIG. 1, each subframe (e.g., subframe n and subframe n+1) contains two slots (e.g., slot 0 and slot 1) .
  • an UL grant is received on a UE specific DCI.
  • the DCI with CRC bit may be scrambled by a UE specific RNTI (e.g., C-RNTI) , and is extracted from a PDCCH via a blind decoding.
  • the DCI can indicate an UL resource on a PUSCH. That is, the DCI indicates time and frequency locations of the PUSCH (e.g., UL grant) . Therefore, the UE may perform a corresponding UL data (e.g., TB) transmission on the PUSCH (e.g., PUSCH transmission) based on the UL grant indicated by the DCI.
  • the PUSCH transmission may be dynamically scheduled via the UL grant in the DCI by an gNB, or may correspond to a configured grant Type 1 or a configured grant Type 2.
  • FIG. 2 is a schematic diagram illustrating an uplink scheduling, according to a related art.
  • Three parameters K 2 , S and L as illustrated in FIG. 2 had been introduced in NR Rel-15.
  • the K 2 was defined as a slot offset between a slot containing a PDCCH that carries a DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing a UL resource (e.g., the PUSCH resource) assigned by the DCI.
  • the S and L were defined as an index of a starting symbol and the number of consecutive symbols within the indicated slot (e.g., the slot containing the PUSCH resource) .
  • each subframe e.g., subframe n and subframe n+1
  • contains two slots e.g., slot 0 and slot 1 .
  • the number of slots contained within each of subframes is determined based on the numerology of numerology configuration, so it is not limited herein, but a fixed number of the symbols are contained in each of slots.
  • FIG. 3 is a schematic diagram illustrating a symbol level illustration of parameters K 2 , S and L, according to a related art. As illustrated in FIG. 3, there are two slots (e.g., slot 0 and slot 1) , and each of the slots consists of 14 symbols (e.g., symbol 0 to symbol 13) . FIG. 3 illustrates that the parameter S is configured as ‘3’ and the parameter L is configured as ‘5’ . It implies that the UL resource scheduled by the gNB on the PUSCH was started from the symbol ‘3’ of the slot 1 and ended at the symbol ‘7’ of the slot 1.
  • Radio Access Network can be configured to be operated on a spectrum of Frequency Range 2 (FR2) . More precisely, the frequency band configured for a serving cell may be on FR2. But typically, a high frequency follows with some challenges such as coverage loss affected by serious pathloss. Hence, there is a need to introduce proper mechanisms to prevent the performance and service quality degradation.
  • FR2 Frequency Range 2
  • multiple physical channels are used for UL transmissions as well as DL receptions.
  • a PDCCH is used for control signaling (e.g., DCI that carries parameters K 0 , K 1 and K 2 )
  • a PDSCH and a PUSCH are used for data signaling.
  • mechanisms for monitoring the PDCCH for a DCI transmission are needed for further improvements in wireless communication for the 5G NR wireless communication system.
  • the present disclosure provides a method of monitoring a Physical Downlink Control Channel (PDCCH) and a related device.
  • PDCCH Physical Downlink Control Channel
  • a method of monitoring a PDCCH for a user equipment includes receiving, from a base station (BS) , at least a PDCCH configuration for a downlink control information (DCI) reception, DCI scheduling a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) , receiving, from the BS, at least a PDCCH repetition configuration for indicating a number of repetitions for a PDCCH transmission or a time domain resource for the PDCCH transmission, and monitoring the PDCCH according to the at least a PDCCH configuration and the at least a PDCCH repetition configuration, where the at least a PDCCH configuration is associated with the at least a PDCCH repetition configuration.
  • DCI downlink control information
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • a UE for monitoring a PDCCH includes a processor configured to execute a computer-executable program, and a memory coupled to the processor and configured to store the computer- executable program, wherein the computer-executable program instructs the processor to perform the above-described method of monitoring a PDCCH.
  • FIG. 1 is a schematic diagram illustrating a HARQ-ACK feedback corresponding to a PDSCH scheduling, according to a related art.
  • FIG. 2 is a schematic diagram illustrating an uplink scheduling, according to a related art.
  • FIG. 3 is a schematic diagram illustrating a symbol level illustration of parameters K 2 , S and L, according to a related art.
  • FIG. 4 is a schematic diagram illustrating a PDCCH configuration for a PDDCH monitoring, according to an implementation of the present disclosure.
  • FIG. 5 is a schematic diagram illustrating multiple PDCCH configurations for a PDDCH monitoring, according to an implementation of the present disclosure.
  • FIG. 6 is a schematic diagram illustrating an association between PDCCH configurations and PDCCH repetition configurations, according to an implementation of the present disclosure.
  • FIG. 7 is a schematic diagram illustrating an association between PDCCH configurations and a PDCCH repetition configuration, according to an implementation of the present disclosure.
  • FIG. 8 is a schematic diagram illustrating PDCCH repetitions, according to an implementation of the present disclosure.
  • FIG. 9 is a schematic diagram illustrating a repetition duration, according to an implementation of the present disclosure.
  • FIG. 10 is a schematic diagram illustrating an association between a PDCCH repetition configuration and a DCI format, according to an implementation of the present disclosure.
  • FIG. 11 is a schematic diagram illustrating an inconsecutive repetition duration, according to an implementation of the present disclosure.
  • FIG. 12 is a schematic diagram illustrating several alternatives for applying parameters K 0 and K 2 , according to an implementation of the present disclosure.
  • FIG. 13 is a flowchart illustrating a method of monitoring a PDCCH, according to an implementation of the present disclosure.
  • FIG. 14 is a block diagram illustrating a node for wireless communication, according to an implementation of the present disclosure.
  • a and/or B may represent that: A exists alone, A and B exist at the same time, and B exists alone.
  • a and/or B and/or C may represent that at least one of A, B, and C exists, A and B exist at the same time, A and C exist at the same time, B and C exist at the same time, and A, B and C exist at the same time.
  • the character “/” used herein generally represents that the former and latter associated objects are in an “or” relationship.
  • any two or more of the following paragraphs, (sub) -bullets, points, actions, behaviors, terms, alternatives, examples, or claims in the present disclosure may be combined logically, reasonably, and properly to form a specific method.
  • Any sentence, paragraph, (sub) -bullet, point, action, behavior, term, or claim in the present disclosure may be implemented independently and separately to form a specific method.
  • Dependency e.g., “based on” , “more specifically” , “preferably” , “In one embodiment” , “In one implementation” , “In one alternative” , in the present disclosure may refer to just one possible example that would not restrict the specific method.
  • any disclosed network function (s) or algorithm (s) may be implemented by hardware, software, or a combination of software and hardware.
  • Disclosed functions may correspond to modules that may be software, hardware, firmware, or any combination thereof.
  • the software implementation may comprise computer-executable instructions stored on a computer-readable medium, such as memory or other types of storage devices.
  • one or more microprocessors or general-purpose computers with communication processing capability may be programmed with corresponding executable instructions and carry out the disclosed network function (s) or algorithm (s) .
  • the microprocessors or general-purpose computers may be formed of Application-Specific Integrated Circuits (ASICs) , programmable logic arrays, and/or using one or more Digital Signal Processors (DSPs) .
  • ASICs Application-Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • the computer-readable medium may include, but may not be limited to, Random Access Memory (RAM) , Read-Only Memory (ROM) , Erasable Programmable Read-Only Memory (EPROM) , Electrically Erasable Programmable Read-Only Memory (EEPROM) , flash memory, Compact Disc (CD) Read-Only Memory (CD-ROM) , magnetic cassettes, magnetic tape, magnetic disk storage, or any other equivalent medium capable of storing computer-readable instructions.
  • RAM Random Access Memory
  • ROM Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • flash memory Compact Disc (CD) Read-Only Memory (CD-ROM)
  • CD-ROM Compact Disc
  • magnetic cassettes magnetic tape
  • magnetic disk storage or any other equivalent medium capable of storing computer-readable instructions.
  • a radio communication network architecture may typically include at least one base station (BS) , at least one UE, and one or more optional network elements that provide connection with a network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • NR New Radio
  • the UE may communicate with the network (e.g., a Core Network (CN) , an Evolved Packet Core (EPC) network, an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) , a Next-Generation Core (NGC) , a 5G Core (5GC) , or an internet) via a Radio Access Network (RAN) established by one or more BSs.
  • CN Core Network
  • EPC Evolved Packet Core
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • NGC Next-Generation Core
  • 5GC 5G Core
  • RAN Radio Access Network
  • a UE may include, but is not limited to, a mobile station, a mobile terminal or device, or a user communication radio terminal.
  • a UE may be a portable radio equipment that includes, but is not limited to, a mobile phone, a tablet, a wearable device, a sensor, or a Personal Digital Assistant (PDA) with wireless communication capability.
  • PDA Personal Digital Assistant
  • the UE may be configured to receive and transmit signals over an air interface to one or more cells in a RAN.
  • a BS may include, but is not limited to, a node B (NB) as in the Universal Mobile Telecommunication System (UMTS) , an evolved node B (eNB) as in the LTE-A, a Radio Network Controller (RNC) as in the UMTS, a Base Station Controller (BSC) as in the Global System for Mobile communications (GSM) /GSM Enhanced Data rates for GSM Evolution (EDGE) RAN (GERAN) , a next-generation eNB (ng-eNB) as in an Evolved Universal Terrestrial Radio Access (E-UTRA) BS in connection with the 5GC, a next-generation Node B (gNB) as in the 5G-RAN (or in the 5G Access Network (5G-AN) ) , and any other apparatus capable of controlling radio communication and managing radio resources within a cell.
  • the BS may connect to serve the one or more UEs via a radio interface to the network.
  • a BS may be configured to provide communication services according to at least one of the following Radio Access Technologies (RATs) : Worldwide Interoperability for Microwave Access (WiMAX) , GSM (often referred to as 2G) , GERAN, General Packet Radio Service (GRPS) , UMTS (often referred to as 3G) according to basic Wideband-Code Division Multiple Access (W-CDMA) , High-Speed Packet Access (HSPA) , LTE, LTE-A, enhanced LTE (eLTE) , NR (often referred to as 5G) , and/or LTE-A Pro.
  • RATs Radio Access Technologies
  • the BS may be operable to provide radio coverage to a specific geographical area using a plurality of cells forming the RAN.
  • the BS may support the operations of the cells.
  • Each cell may be operable to provide services to at least one UE within its radio coverage. More specifically, each cell (often referred to as a serving cell) may provide services to one or more UEs within its radio coverage (e.g., each cell schedules the downlink (DL) and optionally UL resources to at least one UE within its radio coverage for DL and optionally UL packet transmissions) .
  • the BS may communicate with one or more UEs in the radio communication system via the plurality of cells.
  • a cell may allocate Sidelink (SL) resources for supporting Proximity Service (ProSe) , LTE SL services, and LTE/NR Vehicle-to-Everything (V2X) services. Each cell may have overlapped coverage areas with other cells.
  • SL Sidelink
  • Proximity Service Proximity Service
  • LTE SL services LTE/NR Vehicle-to-Everything
  • V2X Vehicle-to-Everything
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • SpCell Special Cell
  • a Primary Cell may refer to the SpCell of an MCG.
  • a Primary SCG Cell (PSCell) may refer to the SpCell of an SCG.
  • MCG may refer to a group of serving cells associated with the Master Node (MN) , comprising the SpCell and optionally one or more Secondary Cells (SCells) .
  • SCG may refer to a group of serving cells associated with the Secondary Node (SN) , comprising the SpCell and optionally one or more SCells.
  • the frame structure for NR is to support flexible configurations for accommodating various next-generation (e.g., 5G) communication requirements, such as eMBB, mMTC, and URLLC, while fulfilling high reliability, high data rate, and low latency requirements.
  • 5G next-generation
  • the orthogonal frequency-division multiplexing (OFDM) technology may serve as a baseline for an NR waveform.
  • the scalable OFDM numerology such as the adaptive sub-carrier spacing, the channel bandwidth, and the cyclic prefix (CP) , may also be used.
  • two coding schemes are applied for NR: (1) low-density parity-check (LDPC) code and (2) polar code.
  • the coding scheme adaption may be configured based on the channel conditions and/or the service applications.
  • DL transmission data in a transmission time interval of a single NR frame, at least DL transmission data, a guard period, and UL transmission data should be included.
  • the respective portions of the DL transmission data, the guard period, and the UL transmission data should also be configurable, for example, based on the network dynamics of NR.
  • An SL resource may also be provided via an NR frame to support ProSe services or V2X services.
  • the path loss may reduce successful rate of the PDCCH decoding as well as reduce the coverage of a serving cell.
  • a transmitter e.g., the gNB
  • that repeats signal transmissions for boosting cumulatively received signal power on a receiver may be one potential solution to against the path loss problem.
  • to decide a proper number of times that the gNBshould repeat the signal transmissions is a tradeoff between the amount of radio resources utilized for the repetitions and the coverage recovered. That is, the coverage is recovered by utilizing more radio resources for the repetitions/transmissions. For example, a huge number of repetitions may significantly increase the cumulatively received signal power, which causes that the gNB requires more radio resources on the physical channel as well as consume more transmission power. Hence, the number of repetitions should be properly decided and configured.
  • the number of repetitions for the UE to know may be a challenging work and is also important for the UE to monitor the PDCCH.
  • the gNB may transmit a DCI to the UE on a PDCCH for assigning a DL data reception on a PDSCH.
  • the gNB may transmit a DCI to the UE on a PDCCH for scheduling a UL resource on PUSCH.
  • the DL data reception and UL data transmission is affected by a DCI transmission on the PDCCH monitored by the UE.
  • implementations of the PDCCH repetition mechanism in several aspects are disclosed. For example, implementations for a gNB to indicate the number of PDCCH repetitions to a UE, implementations for the UE to apply the previously mentioned parameters K 0 and K 2 , and implementations for configurations of the PDCCH repetitions are disclosed as follows.
  • Section A Determination of the number of PDCCH repetitions
  • a UE may be provided or indicated by a gNB via one or multiple configurations (e.g., PDCCH configuration) carried by one or multiple DL signals to monitor a PDCCH on a DL BWP periodically.
  • a DL signal may be a DL Radio Resource Control (RRC) message. That is, the DL RRC message carrying the PDCCH configuration is used for indicating where (e.g., frequency domain, for example, which BWP or which carrier) and when (e.g., time domain, for example, which symbol and slot) the UE should monitor the PDCCH.
  • FIG. 4 is a schematic diagram illustrating a PDCCH configuration for a PDDCH monitoring, according to an implementation of the present disclosure.
  • the PDCCH configuration may include at least the following parameters: offset, searchspace_duration, periodicity, CORESET_duration and monitoring_symbol.
  • a system frame consists of ten subframes.
  • Each of the subframes consists of multiple slots, where the number of slots within one subframe may be determined based on a configuration of subcarrier spacing. There is always an integer number of slots in a subframe.
  • system frames are appearance consecutively.
  • slots are also appear consecutively along with the time axis as illustrated in FIG. 4.
  • the horizontal axis is represented as a time domain (e.g., slot) and the vertical axis is represented as a frequency domain (e.g., DL BWP) .
  • the gNB Based on the frame structure as above mentioned, the gNB indicates which slots among these consecutive slots the UE should monitor the PDCCH, to the UE via a PDCCH configuration.
  • the UE For each DL BWP configured to the UE in a serving cell, the UE is provided with at least a PDCCH configuration that includes at least parameters: offset, searchspace_duration, periodicity, CORESET_duration and monitoring_symbol.
  • the PDCCH configuration may be provided by the gNB through any one or multiple layers, for example, the RRC layer, the Medium Access Control (MAC) layer and the Physical (PHY) layer.
  • the PDCCH configuration may be carried by a MAC control element (CE) .
  • CE MAC control element
  • the PDCCH configuration may be carried by a DCI.
  • the parameters offset, searchspace_duration and periodicity may be but not limited to indicate an integer value with unit of slot. That is, the offset, searchspace_duration and periodicity may be represented as an integer number (of slots) .
  • the parameter CORESET_duration may be but not limited to indicate an integer value with unit of symbol. That is, the CORESET_duration may be represented as an integer number (of symbols) .
  • the monitoring_symbol is represented as index of symbol.
  • the gNB may provide multiple PDCCH configurations to the UE.
  • Each PDCCH configuration provides at least one of offset, searchspace_duration, periodicity, CORESET_duration and monitoring_symbol.
  • the UE should perform the PDCCH monitoring according to the PDCCH configurations.
  • FIG. 5 is a schematic diagram illustrating multiple PDCCH configurations for a PDDCH monitoring, according to an implementation of the present disclosure. As illustrated in FIG. 5, the UE is provided with two PDCCH configurations (e.g., the PDCCH configuration #1 and the PDCCH configuration #2) associated with a single DL BWP. Hence, the UE should perform the PDCCH monitoring according to the PDCCH configuration #1 and the PDCCH configuration #2.
  • a serial number of consecutive slots are grouped together as a PDCCH monitoring period (e.g., periodicity of FIG. 4 and FIG. 5) .
  • a PDCCH monitoring period consists of “periodicity” consecutive slots.
  • the UE monitors the PDCCH on a portion of slots. More specifically, as illustrated in FIG. 4, the UE monitors the PDCCH on “searchspace_duration” consecutive slots starting from the “offset” slots after the beginning of the PDCCH monitoring period.
  • a PDCCH monitoring period includes a serial number of consecutive slots that starts from slot s and ends on slot s+p-1 .
  • the UE monitors the PDCCH on a serial number of consecutive slots that starts from the slot n and ends on the slot n+d-1 , the slot n having an offset in slots after the slot s . That is, ‘n- (s-1) ’ is equal to offset, where ‘d’ is equal to searchspace_duration and ‘p’ is equal to periodicity.
  • the UE may monitor the PDCCH on a portion of symbols of each slot.
  • the portion of symbols are determined by CORESET_duration and monitoring_symbol. That is, within each slot, the UE should monitor the PDCCH that starts from the symbol indicated by monitoring_symbol and continue the PDCCH monitoring for “CORESET_duration” consecutive symbols.
  • the UE in slot n+1 may perform the PDCCH monitoring on consecutive symbols multiple times (e.g., two times) .
  • the gNB may indicate multiple symbol indexes via the monitoring_symbol.
  • the gNB may provide multiple of monitoring_symbol configurations to the UE.
  • Each of the “monitoring_symbol” configurations indicates a symbol index.
  • the gNB may provide a single monitoring_symbol configuration associated with a BWP, and the monitoring_symbol configuration indicates multiple symbol indexes.
  • the UE may also be provided with a PDCCH repetition configuration by the gNB.
  • the gNB Based on the PDCCH repetition configuration, the gNB indicates PDCCH repetition pattern (e.g., how many times and where to monitor the PDCCH) to the UE.
  • the PDCCH repetition configuration may be provided by the gNB through any one or multiple layers, for example, the RRC layer, the MAC layer and the PHY layer.
  • the PDCCH repetition configurations may be carried by a MAC CE.
  • the PDCCH repetition configuration may be carried by a DCI.
  • the PDCCH repetition configuration may include a first repetition parameter that provides information for indicating how many times the gNB will repeat the PDCCH transmission (e.g., the number of times the PDCCH transmission that carries the DCI is repeated) to the UE.
  • the PDCCH repetition configuration may include a second repetition parameter that provides information for indicating where the gNB will repeat the PDCCH transmissions (e.g., which subframes, slots, symbols the gNB will perform the PDCCH repetitions) to the UE. It is noted that the UE may be provided with one or multiple PDCCH repetition configurations.
  • the PDCCH repetition configuration may be associated with a serving cell group, serving cell and/or BWP.
  • the PDCCH repetition configuration may be associated with the PDCCH configuration. That is, for a case that the UE is indicated to monitor the PDCCH on a DL BWP via a specific PDCCH configuration, the gNB may also indicate the PDCCH repetition configuration that is associated with the specific PDCCH configuration, to the UE. Then, the UE determines the PDCCH repetition pattern for the PDCCH monitoring according to the PDCCH repetition configuration.
  • FIG. 6 is a schematic diagram illustrating an association between PDCCH configurations and PDCCH repetition configurations, according to an implementation of the present disclosure. As illustrated in FIG.
  • the UE is provided with two PDCCH configurations (e.g., the PDCCH configuration #1 and the PDCCH configuration #2) and two PDCCH repetition configurations (e.g., the PDCCH repetition configuration #1 and the PDCCH repetition configuration #2) .
  • the UE should monitor the PDCCH according to the PDCCH configuration #1 and the PDCCH configuration #2.
  • the UE determines the PDCCH repetition pattern for the PDCCH monitoring that is configured by the PDCCH configuration #1 according to the PDCCH repetition configuration #1.
  • the UE determines the PDCCH repetition pattern for the PDCCH monitoring that is configured by the PDCCH configuration #2 according to the PDCCH repetition configuration #2. Therefore, the UE monitors the PDCCH according to the PDCCH repetition patterns configured by the PDCCH repetition configuration #1 and the PDCCH repetition configuration #2.
  • the PDCCH repetition configuration may be associated with a BWP. That is, for a case that the UE is indicated, by the gNB, to perform the PDCCH monitoring on a BWP, the gNB may also indicate that the PDCCH repetition configuration is associated with the BWP, to the UE. Then, the UE determines the PDCCH repetition pattern for the PDCCH monitoring on the BWP according to the PDCCH repetition configuration. As illustrated in FIG. 5, the UE is provided with two PDCCH configurations (e.g., the PDCCH configuration #1 and the PDCCH configuration #2) that are associated with a DL BWP, but the UE is only be provided with a PDCCH repetition configuration associated with the DL BWP.
  • the PDCCH configuration #1 and the PDCCH configuration #2 are associated with a DL BWP
  • the UE determines the PDCCH repetition configuration according to the configured BWP.
  • the UE should perform PDCCH monitoring configured by the PDCCH configuration #1 and PDCCH configuration #2. Meanwhile, the UE determines the PDCCH repetition pattern for the PDCCH monitoring that is configured by the PDCCH configuration #1 and PDCCH configuration #2 according to the PDCCH repetition configuration.
  • the PDCCH monitoring configured by the PDCCH configuration #1 and PDCCH configuration #2 may share the same PDCCH repetition configuration.
  • the UE monitors the PDCCH according to the PDCCH repetition pattern configured by the one PDCCH repetition configuration.
  • the PDCCH repetition configuration may be associated with a serving cell. That is, for a case that the UE is indicated, by the gNB, to perform PDCCH monitoring on any BWP of the serving cell, the gNB may also indicate a PDCCH repetition configuration associated with the serving cell, to the UE. The UE determines the PDCCH repetition configuration according to the configured serving cell. Then, the UE determines the PDCCH repetition pattern for the PDCCH monitoring on any of BWP of the serving cell according to the PDCCH repetition configuration.
  • FIG. 7 is a schematic diagram illustrating an association between PDCCH configurations and a PDCCH repetition configuration, according to an implementation of the present disclosure. As illustrated in FIG.
  • the UE is configured with two BWP (e.g., the DL BWP #1 and the DL BWP #2) in the configured serving cell, and is provided with four PDCCH configurations (e.g., PDCCH configuration #1, #2, #3 and #4) .
  • the PDCCH configurations #1 and #2 are associated with the DL BWP #1
  • the PDCCH configurations #3 and #4 are associated with the DL BWP #2, but the UE is only be provided with a PDCCH repetition configuration associated with the serving cell.
  • the UE should perform PDCCH monitoring configured by the PDCCH configurations (e.g., the PDCCH configuration #1 and #2, or the PDCCH configuration #3 and #4) that are associated with the current active BWP (e.g., the DL BWP #1 or the DL BWP #2) . Meanwhile, the UE determines the PDCCH repetition pattern for the PDCCH monitoring that is configured by the PDCCH configuration #1, #2, #3 and #4 according to the PDCCH repetition configuration. In other words, the PDCCH monitoring configured by the PDCCH configuration #1, #2, #3 and #4 may share the same PDCCH repetition configuration. The UE monitors the PDCCH according to the PDCCH repetition pattern configured by the one PDCCH repetition configuration.
  • the PDCCH configurations e.g., the PDCCH configuration #1 and #2, or the PDCCH configuration #3 and #4
  • the UE determines the PDCCH repetition pattern for the PDCCH monitoring that is configured by the PDCCH configuration #1, #2, #3 and #4 according to the PDCCH repetition
  • the PDCCH repetition configuration may be associated with a serving cell group. That is, for a case that the UE is indicated, by the gNB, to perform the PDCCH monitoring on any BWP of the serving cell group, the gNB may also indicate the UE a PDCCH repetition configuration associated with the serving cell group. The UE determines the PDCCH repetition configuration according to the configured serving cell group. Then, the UE determines the PDCCH repetition pattern for the PDCCH monitoring on any of BWP of any serving cell within the serving cell group according to the PDCCH repetition configuration. The UE monitors the PDCCH according to the PDCCH repetition pattern configured by the PDCCH repetition configuration.
  • the gNB may indicate a list of PDCCH repetition configurations, to the UE. It is noted that the list of PDCCH repetition configurations consists of multiple PDCCH repetition configurations, and each of the PDCCH repetition configurations may be associated with a repetition configuration index. With the repetition configuration index, the gNB indicates which PDCCH repetition configuration among the list of PDCCH repetition configurations is applied by the UE for monitoring the PDCCH.
  • the list of PDCCH repetition configurations and repetition configuration index may be but not limited to be provided by the gNB to the UE via a RRC signal, a MAC signal (e.g., MAC CE) and/or a PHY signal (e.g., DCI) . It is noted that the list of PDCCH repetition configuration may be but not limited to be associated with a configured BWP, a serving cell and /or a serving cell group.
  • PHY signaling may be but not limited to be a specific format of DCI, a specific field of a DCI, a specific field of a DCI where the field is set to a specific value, or a DCI with CRC bits scrambled with a specific RNTI.
  • FIG. 8 is a schematic diagram illustrating PDCCH repetitions, according to an implementation of the present disclosure.
  • each slot e.g., slot n , slot n+1 , ...slot n+d-1 ,
  • each slot may consist of multiple CORESETs (e.g., the symbols that the UE should monitor the PDCCH configured by the monitoring_symbol and CORESET_duration) .
  • the slot n consists of two CORESETs, where the two CORESETs are indicated by the index n: 1 and n: 2 respectively
  • the slot n+1 consists of two CORESETs, where the two CORESETs are indicated by the index n+1: 1 and n+1: 2 respectively, and so on.
  • the UE should know the number of times that the gNB performs the PDCCH repetitions for a DCI transmission.
  • the UE may not know which of PDCCHs (among all of the monitored PDCCHs) shall be combined for blind decoding.
  • the UE may also need to know where (e.g., which CORESET (s) /slot (s) ) the gNB performs the PDCCH repetitions.
  • the number of times that the gNB performs the PDCCH repetitions for a DCI transmission may equal to the total number of CORESETs within the “serachspace_duration” consecutive slots within one PDCCH monitoring period (e.g., the “periodicity” consecutive slots as illustrated in FIG. 8) . That is, the gNB continuously repeats a PDCCH transmission among all CORESETs within the PDCCH monitoring period. In this case, the gNB does not indicate the number of PDCCH repetitions to the UE, and the UE implicitly determines the number of PDCCH repetitions according to the total number of CORESETs within the PDCCH monitoring period.
  • the number of PDCCH repetitions may be explicitly indicated by the gNB to the UE. Besides, the gNB may further indicates where the number of PDCCH repetitions is transmitted, to the UE.
  • FIG. 9 is a schematic diagram illustrating a repetition duration, according to an implementation of the present disclosure. As illustrated in FIG. 9, the gNB may indicates which CORESET and/or slot among the PDCCH monitoring period is the first PDCCH repetition among the number of PDCCH repetitions.
  • the gNB may continuously repeats a PDCCH transmission that starts from the starting CORESET (e.g., indicated by the index n: 1) and ends on the ending CORESET (e.g., indicated by the index n+1: 2) that had an offset in a number of CORESETs from the started CORESET.
  • the number of PDCCH repetitions is equal to the number of CORESETs.
  • the starting CORESET may be a first CORESET (e.g., indicated by the index n: 1 and n+2: 1) within the first slot (e.g., slot n and slot n+2 ) within a repetition duration (e.g., 1 st repetition duration and 2 nd repetition duration) .
  • the repetition duration may be defined as a number of slots/CORESET.
  • the gNB may repeats the PDCCH transmission among all CORESET within the slots belonged to the repetition duration.
  • the repetition duration is configured as 2 slots
  • the slot n and slot n+1 are the slots belong to a first repetition duration (e.g., 1 st repetition duration)
  • two CORESETs in each slots e.g., CORESET n: 1 and CORESET n: 2 within the slot n and CORESET n+1: 1 and CORESET n+1: 2 within the slot n+1 .
  • the gNB may repeat the PDCCH transmission four times while each time on one of the four CORESETs (e.g., CORESET n: 1, CORESET n: 2, CORESET n+1: 1 and CORESET n+1: 2) belonged to the 1 st repetition duration.
  • CORESET n 1, CORESET n: 2, CORESET n+1: 1 and CORESET n+1: 2
  • multiple repetition durations may be within the “searchspace_duration” consecutive slots.
  • the gNB may repeat the PDCCH transmission four times while each time on one of the four CORESETs (e.g., CORESET n+2: 1, CORESET n+2: 2, CORESET n+3: 1 and CORESET n+3: 2) belonged to the 2 nd repetition duration.
  • CORESET n+2 1, CORESET n+2: 2, CORESET n+3: 1 and CORESET n+3: 2
  • the gNB may repeat the PDCCH transmission among the consecutive CORESETs within repetition duration.
  • the repetition duration is configured as 4 CORESET
  • the first four CORESETs e.g., CORESET n: 1, CORESET n: 2, CORESET n+1: 1 and CORESET n+1: 2
  • searchspace_duration consecutive slots belonged to the 1 st repetition duration.
  • multiple of repetition duration may be within the “searchspace_duration” consecutive slots. Therefore, once the gNB transmits a DCI to the UE within the 2 nd repetition duration (i.e., CORESET n+2: 1, CORESET n+2: 2, CORESET n+3: 1 and CORESET n+3: 2) , the gNB may repeat the PDCCH transmission four times while each time on one of the four CORESETs belonged to the 2 nd repetition duration.
  • the PDCCH configuration and/or the PDCCH repetition configuration may be configured by the gNB to be associated with a specific format of DCI (e.g., DCI 0_0, 0_1, 0_2, 1_0, 1_1, 1_2, 2_0, 2_1, 2_2, 2_3, 2_4 2_5, 2_6, 3_0 and/or 3_1) . That is, when the UE monitors the PDCCH for a specific format of DCI, the UE should perform the PDCCH monitoring for the specific format of DCI according to a PDCCH configuration that is associated with the specific format of DCI. In other words, the PDCCH monitoring for different formats of DCI may follow different PDCCH configurations.
  • DCI 0_0, 0_1, 0_2, 1_0, 1_1, 1_2, 2_0, 2_1, 2_2, 2_3, 2_4 2_5, 2_6, 3_0 and/or 3_1 e.g., DCI 0_0, 0_1,
  • the UE when the UE monitors the PDCCH for a specific format of DCI, the UE determines the PDCCH repetition pattern according to a PDCCH repetition configuration that is associated with the specific format of DCI. Hence, the PDCCH repetition pattern for the transmissions of different formats of DCI may follow different PDCCH configurations.
  • the PDCCH monitoring for different formats of DCI may follow the same PDCCH configuration, but the UE determines the PDCCH repetition pattern for each of the different formats of DCI according to different PDCCH repetition configurations.
  • FIG. 10 is a schematic diagram illustrating an association between a PDCCH repetition configuration and a DCI format, according to an implementation of the present disclosure. As illustrated in FIG.
  • the UE monitors the PDCCH for the DCI format 1_1 and 2_2 by the PDCCH configuration (e.g., PDCCH configuration #1) , but the UE determines the PDCCH repetition pattern for the DCI format 2_1 according to the PDCCH repetition configuration #1 while determines the PDCCH repetition pattern for the DCI format 1_1 according to the PDCCH repetition configuration #2.
  • PDCCH configuration e.g., PDCCH configuration #1
  • the PDCCH monitoring for different formats of DCI may follow different PDCCH configurations, but the UE determines the PDCCH repetition patterns for each of the different formats of DCI according to the same PDCCH repetition configuration.
  • the PDCCH configuration and/or the PDCCH repetition configuration may be configured by the gNB to be associated with a specific coverage level. It is noted that the coverage level may be dynamically changed either by the UE via some measurement on some specific DL reference signals or be explicitly indicated by the gNB. It is also noted that the coverage level may be determined by a BWP, a serving cell or a group of cells (e.g., a serving cell group) . That is, when the UE performs the PDCCH monitoring, and is currently in a specific coverage level, the UE may apply the PDCCH configuration and/or the PDCCH repetition configuration corresponding to the specific coverage level (e.g., a BWP, a serving cell or a group of cell) .
  • the specific coverage level e.g., a BWP, a serving cell or a group of cell
  • the coverage level and/or the DL reference signal to be measured may be provided by the gNB through any one or multiple layers, for example, the RRC layer, the MAC layer and the PHY layer.
  • the configurations for the coverage level and/or the DL reference signal are provided through the MAC layer, the configurations may be carried by a MAC CE.
  • the configurations for the coverage level and/or the DL reference signal are provided through the PHY layer, the configurations may be carried by a DCI.
  • the UE may determine the number of repetitions implicitly according to the number of CORESET/slot within each repetitio durations. That is, the gNB does not explicitly indicate the number of times for the PDCCH repetitions or the PDCCH transmissions, to the UE .
  • the gNB always repeats the PDCCH transmission among the CORESET within a repetition duration (e.g., each transmission on a CORESET) .
  • the PDCCH repetition configuration may further include a parameter that configures an integer number (e.g., divided_number) .
  • the 1 st repetition duration may be started from the 1 st slot in the serachspace_duration consecutive slots
  • the 2 nd repetition duration may be started from the 5 th slot in the serachspace_duration consecutive slots, and so on.
  • the repetition duration may be defined as multiple CORESETs that are not consecutively located in the time domain (e.g., inconsecutive) .
  • FIG. 11 is a schematic diagram illustrating an inconsecutive repetition duration, according to an implementation of the present disclosure. As the illustration in FIG. 11, the 1 st repetition duration may be configured as 4 consecutive slots, but the PDCCH repetitions may be transmitted on the 1 st CORESET of each of the 4 consecutive slots.
  • the gNB repeats the PDCCH transmissions for a DCI on the CORESET n: 1, CORESET n+1: 1, CORESET n+2: 1 and CORESET n+3: 1, and repeats the PDCCH transmissions for another DCI on the CORESET n: 2, CORESET n+1: 2, CORESET n+2: 2 and CORESET n+3: 2.
  • Section B Determination of K 0 and K 2
  • the gNB may transmits DL assignment (e.g., PDSCH) and UL grant (for PUSCH) to the UE via the PDCCH repetition mechanism.
  • DL assignment e.g., PDSCH
  • UL grant for PUSCH
  • the UE may successfully decode the DCI before the end of the repetition duration.
  • FIG. 12 is a schematic diagram illustrating several alternatives for applying parameters K 0 and K 2 , according to an implementation of the present disclosure. As illustrated in FIG.
  • the gNB repeats the DCI transmissions on the PDCCH on CORESET n: 1, n: 2, n+1: 1 and n+1: 2 respectively within the 1 st repetition duration.
  • the UE monitor the PDCCH according to the PDCCH configuration and the PDCCH repetition configuration.
  • the UE successfully decodes the DCI on CORESET n: 1 and determines the value of the parameters K 0 and K 2 according to the decoded DCI.
  • the UE may be provided with a time domain resource allocation (TDRA) list by the gNB via a RRC signal, the TDRA list including a list of values of parameters K 0 and K 2 .
  • the DCI includes an indicator that indicates which of the values within the list should be applied by the UE for a corresponding scheduling.
  • FIG. 12 illustrates possible positions (e.g., time location or slot) in the time domain that the UE may apply the “K 0 ” value and “K2” value when receiving the DCI.
  • the K 0 was defined as a slot offset between a slot containing a PDCCH that carries a DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the UE may apply the “K 0 ” value in a possible location (e.g., slot) in a time domain.
  • the UE may determine the mechanism (e.g., the following alternatives a-f) to apply the “K 0 ” value.
  • the K 0 is defined as a slot offset between a slot (e.g., slot n ) containing a first PDCCH repetition (e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration) ) that carries a DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • a slot offset between a slot e.g., slot n
  • a first PDCCH repetition e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration)
  • a DCI e.g., the DCI indicates the following PDSCH reception
  • the K 0 is defined as a slot offset between a first slot (e.g., slot n+1 ) after a slot (e.g., slot n ) containing a first PDCCH repetition (e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration) ) that carries a DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • a first PDCCH repetition e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration)
  • a DCI e.g., the DCI indicates the following PDSCH reception
  • a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 0 is defined as a slot offset between the last slot (e.g., slot n+3 ) of the 1 st repetition duration where the UE receives the DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 0 is defined as a slot offset between a slot (e.g., slot n+4 ) after the last slot (e.g., slot n+3 ) of the 1 st repetition duration where the UE receives the DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 0 is defined as a slot offset between the last slot (e.g., slot n+d-1 ) of the “searchspace_duration” consecutive slots where the UE receives the DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 0 is defined as a slot offset between a slot (e.g., slot n+d ) after the last slot (e.g., slot n+d-1 ) of the “searchspace_duration” consecutive slots where the UE receives the DCI (e.g., the DCI indicates the following PDSCH reception) and a slot containing the PDSCH that is indicated or scheduled by the DCI.
  • the K 2 was defined as a slot offset between a slot containing a PDCCH that carries a DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource assigned by the DCI.
  • the UE may apply the “K 2 ” value in a possible location (e.g., slot) in a time domain.
  • the UE may determine the mechanism (e.g., the following alternatives a-f) to apply the “K 2 ” value.
  • the K 2 is defined as a slot offset between a slot (e.g., slot n ) containing a first PDCCH repetition (e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration) ) that carries a DCI (e.g., the DCI indicates the following PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • a slot offset between a slot e.g., slot n
  • a first PDCCH repetition e.g., CORESET n
  • the K 2 is defined as a slot offset between a first slot (e.g., slot n+1 ) after a slot (e.g., slot n ) containing a first PDCCH repetition (e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration) ) that carries a DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • a first PDCCH repetition e.g., CORESET n: 1 within a repetition duration (e.g., 1 st repetition duration)
  • a DCI e.g., the DCI indicates a PUSCH resource assignment
  • the K 2 is defined as a slot offset between the last slot (e.g., slot n+3 ) of the 1 st repetition duration where the UE receives the DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • the K 2 is defined as a slot offset between a slot (e.g., slot n+4 ) after the last slot (e.g., slot n+3 ) of the 1 st repetition duration where the UE receives the DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • the K 2 is defined as a slot offset between the last slot (e.g., slot n+d-1 ) of the “searchspace_duration” consecutive slots where the UE receives the DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • the K 2 is defined as a slot offset between a slot (e.g., slot n+d ) after the last slot (e.g., slot n+d-1 ) of the “searchspace_duration” consecutive slots where the UE receives the DCI (e.g., the DCI indicates a PUSCH resource assignment) and a slot containing the UL resource that is assigned by the DCI.
  • FIG. 13 is a flowchart illustrating a method 1300 of monitoring a PDCCH, according to an implementation of the present disclosure.
  • the UE receives, from a BS, at least a PDCCH configuration for a DCI reception, a DCI scheduling a PDSCH or a PUSCH.
  • the UE receives, from the BS, at least a PDCCH repetition configuration for indicating a number of repetitions for a PDCCH transmission or a time domain resource for the PDCCH transmission.
  • the UE monitors the PDCCH according to at least a PDCCH configuration and the at least a PDCCH repetition configuration, where at least a PDCCH configuration is associated with at least a PDCCH repetition configuration.
  • the UE determines a PDCCH repetition configuration from at least a PDCCH repetition configuration according to a BWP configured to the UE, where the PDCCH repetition configuration is associated with the BWP.
  • the UE determines a PDCCH repetition configuration from at least a PDCCH repetition configuration according to a serving cell or a serving cell group configured to the UE, where the PDCCH repetition configuration is associated with the serving cell or the serving cell group.
  • the UE receives, from the BS, a DCI having a DCI format on the monitored PDCCH, and determines a PDCCH repetition configuration from at least a PDCCH repetition configuration according to the DCI format, where the PDCCH repetition configuration is associated with the DCI format.
  • the UE determines a PDCCH repetition configuration from at least a PDCCH repetition configuration according to a coverage level, where the PDCCH repetition configuration is associated with the coverage level that is determined according to at least one of a distance and signal quality between the UE and the BS.
  • the UE receives, from the BS, a DCI on the monitored PDCCH, and then obtains a slot offset (e.g., K 0 ) for indicating a time domain resource for the PDSCH, according to the received DCI.
  • a slot offset e.g., K 0
  • the slot offset indicates a number of slot between a first slot that the UE receives the DCI and a second slot for the PDSCH.
  • the UE determines a slot for applying the slot offset, and then applies the slot offset on the determined slot, to receive the PDSCH, where the determined slot is a slot containing a first repetition of the PDCCH transmission within a repetition duration indicated by at least a PDCCH repetition configuration, a last slot within the repetition duration, or the last slot within a search space duration indicated by the at least a PDCCH configuration.
  • the UE receives, from the BS, a DCI on the monitored PDCCH, and obtains a slot offset (e.g., K 2 ) for indicating a time domain resource for the PUSCH, according to the received DCI.
  • a slot offset e.g., K 2
  • the slot offset indicates a number of slot between a first slot that the UE receives the DCI and a second slot for the PUSCH.
  • the UE determines a slot for applying the slot offset, and then applies the slot offset on the determined slot, to receive the PUSCH, where the slot is a slot containing a first repetition of the PDCCH transmission within a repetition duration indicated by at least a PDCCH repetition configuration, a last slot within the repetition duration, or the last slot within a search space duration indicated by the at least a PDCCH configuration.
  • At least a PDCCH repetition configuration includes information about a repetition duration that is configured as a number of slots or CORESETs, and the number of repetitions for the PDCCH transmission is indicated by the number of slots or CORESETs that is configured by the BS within the repetition duration.
  • the UE receives, from the BS, a list of PDCCH repetition configurations each with an index (e.g., the previously mentioned repetition configuration index) for indicating a specific PDCCH repetition configuration corresponding to a specific PDCCH configuration of at least a PDCCH repetition configuration.
  • an index e.g., the previously mentioned repetition configuration index
  • the UE determines a PDCCH repetition configuration from at least a PDCCH repetition configuration according to the received index.
  • FIG. 14 is a block diagram illustrating a node 1400 for wireless communication, according to an implementation of the present disclosure.
  • the node 1400 may include a transceiver 1420, a processor 1426, a memory 1428, one or more presentation components 1434, and at least one antenna 1436.
  • the node 1400 may also include a Radio Frequency (RF) spectrum band module, a BS communications module, a network communications module, a system communications management module, input/output (I/O) ports, I/O components, and a power supply (not illustrated in FIG. 14) .
  • RF Radio Frequency
  • the node 1400 may be a UE or a BS that performs various disclosed functions illustrated in FIG. 13 and examples/implementations in this disclosure.
  • the transceiver 1420 may include a transmitter 1422 (with transmitting circuitry) and a receiver 1424 (with receiving circuitry) and may be configured to transmit and/or receive time and/or frequency resource partitioning information.
  • the transceiver 1420 may be configured to transmit in different types of subframes and slots including, but not limited to, usable, non-usable and flexibly usable subframes and slot formats.
  • the transceiver 1420 may be configured to receive data and control channels.
  • the node 1400 may include a variety of computer-readable media.
  • Computer-readable media may be any media that can be accessed by the node 1400 and include both volatile (and non-volatile) media and removable (and non-removable) media.
  • Computer-readable media may include computer storage media and communication media.
  • Computer storage media may include both volatile (and/or non-volatile) , as well as removable (and/or non-removable) , media implemented according to any method or technology for storage of information such as computer-readable media.
  • Computer storage media may include RAM, ROM, EPROM, EEPROM, flash memory (or other memory technology) , CD-ROM, Digital Versatile Disk (DVD) (or other optical disk storage) , magnetic cassettes, magnetic tape, magnetic disk storage (or other magnetic storage devices) , etc. Computer storage media do not include a propagated data signal.
  • Communication media may typically embody computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanisms and include any information delivery media.
  • modulated data signal may mean a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal.
  • Communication media may include wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared, and other wireless media. Combinations of any of the disclosed media should be included within the scope of computer-readable media.
  • the memory 1428 may include computer-storage media in the form of volatile and/or non-volatile memory.
  • the memory 1428 may be removable, non-removable, or a combination thereof.
  • the memory 1428 may include solid-state memory, hard drives, optical-disc drives, etc.
  • the memory 1428 may store computer-readable and/or computer-executable instructions 1432 (e.g., software codes) that are configured to, when executed, cause the processor 1426 (e.g., processing circuitry) to perform various disclosed functions.
  • the instructions 1432 may not be directly executable by the processor 1426 but may be configured to cause the node 1400 (e.g., when compiled and executed) to perform various disclosed functions.
  • the processor 1426 may include an intelligent hardware device, a central processing unit (CPU) , a microcontroller, an ASIC, etc.
  • the processor 1426 may include memory.
  • the processor 1426 may process the data 1430 and the instructions 1432 received from the memory 1428, and information received through the transceiver 1420, the baseband communications module, and/or the network communications module.
  • the processor 1426 may also process information to be sent to the transceiver 1420 for transmission via the antenna 1436, and/or to the network communications module for transmission to a CN.
  • Presentation components 1434 may present data to a person or other devices.
  • Presentation components 1434 may include a display device, a speaker, a printing component, a vibrating component, etc.

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Abstract

L'invention concerne un procédé de surveillance d'un canal physique de commande de liaison descendante (PDCCH) pour un équipement utilisateur (UE). Le procédé comprend les étapes consistant à : recevoir d'une station de base (BS) au moins une configuration de PDCCH permettant une réception d'informations de commande de liaison descendante (DCI), les DCI programmant un canal physique partagé de liaison descendante (PDSCH) ou un canal physique partagé de liaison montante (PUSCH) ; recevoir de la BS au moins une configuration de répétition de PDCCH permettant d'indiquer un nombre de répétitions pour une transmission de PDCCH ou une ressource de domaine temporel pour la transmission de PDCCH ; et surveiller le PDCCH en fonction de ladite au moins une configuration de PDCCH et de ladite au moins une configuration de répétition de PDCCH, ladite au moins une configuration de PDCCH étant associée à ladite au moins une configuration de répétition de PDCCH.
PCT/CN2021/125907 2020-10-23 2021-10-22 Procédé de surveillance d'un canal physique de commande de liaison descendante et dispositif associé WO2022083770A1 (fr)

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