[go: up one dir, main page]

WO2025166730A1 - Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante - Google Patents

Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante

Info

Publication number
WO2025166730A1
WO2025166730A1 PCT/CN2024/076947 CN2024076947W WO2025166730A1 WO 2025166730 A1 WO2025166730 A1 WO 2025166730A1 CN 2024076947 W CN2024076947 W CN 2024076947W WO 2025166730 A1 WO2025166730 A1 WO 2025166730A1
Authority
WO
WIPO (PCT)
Prior art keywords
repetition
pdsch
transmission
indication
wireless communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/076947
Other languages
English (en)
Inventor
Junli Li
Nan Zhang
Fangyu CUI
Yachao YIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to PCT/CN2024/076947 priority Critical patent/WO2025166730A1/fr
Publication of WO2025166730A1 publication Critical patent/WO2025166730A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the disclosure relates generally to wireless communications, including but not limited to systems and methods for performing downlink channel coverage enhancement.
  • the PDSCH transmission may include at least one of the following: a Msg2 that includes a random access response (RAR) scheduled by a downlink control information (DCI) signaling; a Msg4 that includes a contention resolution message scheduled by another DCI signaling; and/or a PDSCH transmission that has not been configured with a dedicated resource.
  • the wireless communication device can send/transmit/provide a message to the wireless communication node.
  • the message may include at least one of a request for the PDSCH repetition or a capability report for the PDSCH repetition.
  • the message may further include an indication of at least one of a repetition number or an offset.
  • the Msg3 may include a message transmitted on an uplink shared channel (UL-SCH) that may include at least one of the following: a cell radio network temporary identifier (C-RNTI) , a media access control control element (MAC CE) or a common control channel (CCCH) service date unit (SDU) , from the upper layer and associated with a user equipment (UE) contention resolution identity, as part of a random access procedure.
  • UL-SCH uplink shared channel
  • C-RNTI cell radio network temporary identifier
  • MAC CE media access control control element
  • CCCH common control channel
  • SDU service date unit
  • the PUCCH transmission for Msg4 HARQ-ACK may include at least one of the following: an indication of a PUCCH demodulation reference signal (DMRS) pattern; and/or value of at least one bit except bits for HARQ-ACK feedback.
  • DMRS PUCCH demodulation reference signal
  • the message is sent/transmitted when a condition is satisfied.
  • the condition may include at least one of the following: a measured reference signal received power (RSRP) of a downlink signal is lower than a configured threshold; at least one repetition number or offset is configured; a plurality of repetition numbers or offsets are configured; or/and a high layer signaling is received, indicating to the wireless communication device to send at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition.
  • RSRP measured reference signal received power
  • the wireless communication device can determine a number of repetitions for the PDSCH transmission according to the first indication of the specific repetition number received via the DCI signaling for scheduling the PDSCH transmission. In certain implementations, the wireless communication device can determine a number of repetitions for the PDSCH transmission to be at least one of the following: same as a repetition number of a physical downlink control channel (PDCCH) transmission for scheduling the PDSCH transmission; a repetition number of the PDCCH transmission for scheduling the PDSCH transmission, adjusted by the specific offset; a repetition number of a Msg2 transmission, adjusted by the specific offset; a repetition number of a Msg3 transmission, adjusted by the specific offset; a value mapped to the repetition number of the PDCCH transmission for scheduling the PDSCH transmission, via a mapping table; same as a repetition number of the Msg2 or Msg3 transmission; or/and same as a number of repetitions of a Msg4 transmission.
  • PDCCH physical downlink control channel
  • a downlink signal is lower than a second configured threshold; at least one repetition number or offset is configured; a plurality of repetition numbers or offsets are configured; the wireless communication device has sent at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition; and/or the wireless communication device is capable of the PDSCH repetition but may not have sent at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition.
  • Example configuration 3 Indicating Repetition Number.
  • Example configuration 7 Implementing PDSCH/PDCCH Repetition.
  • FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure
  • FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure
  • FIG. 3 illustrates an example arrangement/configuration of a non-terrestrial network, in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates an example arrangement/configuration that includes a four-step random access channel procedure, in accordance with some embodiments of the present disclosure
  • FIG. 5 illustrates an example arrangement/configuration that includes a two-step random access channel procedure, in accordance with some embodiments of the present disclosure
  • FIG. 6 illustrates an example mechanism for scrambling the cyclic redundancy code with information regarding the repetition number of a physical downlink shared channel transmission, in accordance with some embodiments of the present disclosure.
  • FIG. 7 illustrates a flow diagram of an example method for performing downlink channel coverage enhancement, in accordance with an embodiment of the present disclosure.
  • Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101.
  • the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126.
  • Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
  • the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104.
  • the BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively.
  • Each radio frame 118/124 may be further divided into sub-frames 120/127 which may include data symbols 122/128.
  • the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and/or wired communications, in accordance with various embodiments of the present solution.
  • FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM/OFDMA signals) in accordance with some embodiments of the present solution.
  • the system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein.
  • system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of FIG. 1, as described above.
  • the System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) .
  • the BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220.
  • the UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240.
  • the BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
  • the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232.
  • a duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion.
  • the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212.
  • a downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion.
  • the operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
  • the UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212/232 that can support a particular wireless communication protocol and modulation scheme.
  • the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
  • LTE Long Term Evolution
  • 5G 5G
  • the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example.
  • eNB evolved node B
  • the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc.
  • PDA personal digital assistant
  • the processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein.
  • a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or multiple microprocessors in conjunction with a digital signal processor core, or any other such configuration.
  • the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof.
  • the memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively.
  • the memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230.
  • the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively.
  • Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
  • the network communication module 218 generally represents the hardware, software, firmware, processing logic, and/or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202.
  • network communication module 218 may be configured to support internet or WiMAX traffic.
  • network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network.
  • the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) .
  • MSC Mobile Switching Center
  • the Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems.
  • the model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it.
  • the OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols.
  • the OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model.
  • a first layer may be a physical layer.
  • a second layer may be a Medium Access Control (MAC) layer.
  • MAC Medium Access Control
  • a third layer may be a Radio Link Control (RLC) layer.
  • a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer.
  • PDCP Packet Data Convergence Protocol
  • a fifth layer may be a Radio Resource Control (RRC) layer.
  • a sixth layer may be a Non-Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
  • NAS Non-Access Stratum
  • IP Internet Protocol
  • Non-terrestrial networks have gained traction to provide connectivity in areas where terrestrial networks (TN) are unavailable or unreliable.
  • TN terrestrial networks
  • a key challenge arises due to the large propagation loss inherent in these networks.
  • the loss may present a hurdle for accessing NTN with legacy downlink (DL) channels designed/configured for TN.
  • DL legacy downlink
  • the transparent NTN implementation/arrangement separates the service link between the user equipment (UE) and satellite from the feeder link between the base station (BS) and satellite.
  • the feeder link can be common for all UEs within the same cell.
  • pdsch-AggregationFactor can be used to indicate a repetition factor.
  • PDSCH AggregationFactor is a mechanism through which one DCI signaling can schedule multiple consecutive downlink slots for PDSCH transmission (s) .
  • the number of consecutive slots can be 2, 4, or 8.
  • repetitionNumber in PDSCH-TimeDomainResourceAllocation can be used to indicate a repetition factor for PDSCH.
  • the number of PDSCH transmission occasions for slot-based repetition can be 2, 3, 4, 5, 6, 7, 8, 16.
  • the time domain resource assignment field value, m, of the DCI signaling can provide a row index of m + 1 to an allocation table.
  • the determination of the used resource allocation table can be defined/configured.
  • the indexed row defines the slot offset K 0 , the start and length indicator SLIV, or the start symbol S and the allocation length L directly. Additionally, the indexed row can define the PDSCH transmission mapping type to be assumed/used during the PDSCH transmission reception.
  • the UE when receiving PDSCH transmission scheduled by DCI signaling (e.g., format 1_1 or 1_2) in PDCCH transmission, if the UE is configured with pdsch-AggregationFactor in pdsch-config or sps-Config, the same symbol allocation can be applied across the pdsch-AggregationFactor consecutive slots. In certain implementations, the UE may expect that the TB is repeated within each symbol allocation among each of the pdsch-AggregationFactor consecutive slots and/or the PDSCH transmission is limited to a single transmission layer.
  • DCI signaling e.g., format 1_1 or 1_2
  • a UE can transmit a PRACH preamble with an RA-RNTI upon satisfying any applicable condition (s) for PRACH transmission.
  • a gNB can send a DCI signaling scrambled with an RA-RNTI value.
  • the UE tries/attempts to detect a PDCCH transmission (DCI) with the corresponding RA-RNTI within the RAR-Window period.
  • DCI PDCCH transmission
  • the UE decodes the PDSCH transmission, carrying RAR (random access response) data.
  • RAR random access response
  • the UE can transmit Msg3 (PUSCH transmission) on the same serving cell to which it sent/transmitted/provided PRACH.
  • the UE can monitor and/or decode PDCCH transmission with TC-RNTI (temporary cell radio network temporary identifier) .
  • TC-RNTI temporary cell radio network temporary identifier
  • the UE can decode the PDSCH transmission carrying the MAC CE and/or set the C-RNTI (cell radio network temporary identifier) to TC-RNTI.
  • the UE can send/transmit/provide HARQ ACK for the data carried by the PDSCH transmission (e.g., carrying Msg4) .
  • the UE can receive RRCSetup and respond with RRCSetupComplete (Msg5) .
  • the RACH procedure can simplify the original (e.g., a four-step) random-access process/mechanism by merging/combining the uplink channel information from Msg1 and/or Msg3 into a message (e.g., MsgA) , which is sent/transmitted/provided by the UE to the network.
  • a message e.g., MsgA
  • the downlink channel information from Msg2 and/or Msg4 can be combined into a message (e.g., MsgB) , which is then sent/transmitted/provided by the network to the UE.
  • MsgB message
  • the two-step random-access mechanism can merge the preamble (e.g., Msg1/PRACH) and schedule transmission (e.g., Msg3/PUSCH transmission) into MsgA and/or combine the Random-Access Response (Msg2) with the Contention Resolution message (Msg4) into MsgB.
  • preamble e.g., Msg1/PRACH
  • schedule transmission e.g., Msg3/PUSCH transmission
  • Msg3 Random-Access Response
  • Msg4 Contention Resolution message
  • PDCCH/PDSCH transmission enhancement may be applicable to all PDCCH/PDSCH transmission when the dedicated resource for PDCCH/PDSCH transmission is not configured.
  • Msg1 can include or correspond to at least one of a PRACH transmission or a preamble transmission.
  • Msg2 can include or be a RAR scheduled by a DCI.
  • Msg3 can include or be a message transmitted/sent on an uplink shared channel (UL-SCH) , including a cell radio network temporary identifier (C-RNTI) , media access control control element (MAC CE) , and/or common control channel (CCCH) service date unit (SDU) , from the upper layer, and/or associated with a UE contention resolution identity, as part of a random-access procedure/mechanism.
  • Msg4 can include or be a contention resolution message, which can be scheduled by a DCI.
  • Msg5 can include or correspond to a PUSCH transmission scheduled by DCI signaling and/or higher layer signaling, and/or include/incorporate specific information, such as RRCSetupComplete signaling, RRCResumeComplete signaling, or other types of signaling.
  • the UE can report the repetition request/capability for PDSCH transmission (e.g., Msg2, Msg4, or other PDSCH transmissions when dedicated resources are not configured) repetition via a specific resource (repetition request/report indication) .
  • the PDSCH transmission can be the re-transmission of Msg4.
  • the repetition request or capability report for Msg4 or other PDSCH transmissions when dedicated resources are not configured can be in the same signaling as a repetition request or capability report for Msg2 (e.g., where the repetition request/capability for PDSCH transmission (Msg2) repetition is reported via preamble or RO)
  • the repetition request/capability report for other PDSCH transmissions before dedicated resource is configured can be in the same signaling as a repetition request or capability report for Msg4 (e.g., where the repetition request/capability for PDSCH transmission (Msg4) repetition is reported via Msg3 signaling)
  • the repetition request or capability report for Msg2, Msg4, or other PDSCH transmissions before a dedicated resource is configured can be indicated respectively/separately via one or more methods/configurations/implementations.
  • the signaling of a request or capability report for PDSCH repetition may consider at least
  • a first segment of preamble resource used for performing PRACH repetition (e.g., repetition of PRACH transmission) can be used for a repetition request or capability report for PDSCH repetition.
  • a second segment of preamble resource used for requesting PUSCH transmission (e.g., Msg3) repetition can be used for the repetition request or capability report for PDSCH repetition.
  • a new preamble resource e.g., a third segment of preamble resource
  • a new preamble resource e.g., a third segment of preamble resource
  • a segment of the RO resources used for performing PRACH repetition can be used for a repetition request or capability report for PDSCH repetition.
  • the signaling used for performing PUCCH repetition for Msg4 HARQ-ACK can be used for a repetition request or capability report for PDSCH repetition.
  • Higher layer signaling in Msg3 (PUSCH transmission) for the PDSCH repetition request or capability report may include:
  • the UE can receive the PDSCH transmission according to the dynamic indication.
  • the UE can receive the PDSCH according to the dynamic enabling/disabling indication (e.g., disabling) and/or the configured repetition number or offset.
  • the dynamic enabling/disabling indication e.g., disabling
  • the UE can receive the PDSCH transmission.
  • one repetition number or offset is configured:
  • the network receives the UL signal and/or measures the UL signal strength. In certain implementations, where the UL signal strength is lower than a pre-defined threshold, the network sends the DCI signaling to schedule the PDSCH transmission and/or indicate that the repetition of PDSCH transmission is enabled/allowed via the dynamic enabling/disabling indication of DCI signaling as defined herein.
  • the PDSCH transmission is repeated across each resource allocation for each specified repetitionNumber (e.g., repetition number, or the repetition number of DCI signaling for scheduling the PDSCH transmission adjusted (e.g., plus or minus) by the offset) across consecutive slots.
  • the UE can receive the PDSCH transmission according to the dynamic enabling/disabling indication (e.g., enabling) and/or the configured repetition number or offset.
  • the dynamic enabling/disabling indication e.g., enabling
  • the UE can receive the PDSCH transmission.
  • the network receives the UL signal and/or performs the repetition of PDSCH transmission across each resource allocation for each specified repetitionNumber (e.g., repetition number, or the repetition number of DCI signaling for scheduling the PDSCH transmission adjusted (e.g., plus or minus) by the offset) across consecutive slots.
  • specified repetitionNumber e.g., repetition number, or the repetition number of DCI signaling for scheduling the PDSCH transmission adjusted (e.g., plus or minus) by the offset
  • the UE can receive the PDSCH transmission according to the configured repetition number.
  • the UE can receive the PDSCH transmission.
  • the network receives the UL signal and/or measures the UL signal strength. In certain implementations, where the UL signal strength is higher than a pre-defined threshold, the network sends/transmits the DCI signaling to schedule PDSCH transmission and/or indicate that the repetition of PDSCH transmission is disabled via a dynamic enabling/disabling indication of DCI signaling as defined herein. In certain implementations, the PDSCH transmission may transmit once.
  • the UE can receive the PDSCH transmission according to the dynamic enabling/disabling indication (e.g., disabling) and/or the configured repetition number or offset.
  • the dynamic enabling/disabling indication e.g., disabling
  • the UE can receive the PDSCH transmission.
  • the UE can receive the PDSCH transmission according to the dynamic indication.
  • the UE can receive the PDSCH transmission.
  • the network receives the UL signal and/or indicates the repetition number or offset of the PDSCH transmission via the dynamic indication of DCI signaling as defined herein.
  • the PDSCH transmission is repeated across each resource allocation for each specified repetitionNumber (e.g., repetition number, or the repetition number of the DCI signaling to schedule the PDSCH transmission adjusted (e.g., plus or minus) by the offset) across consecutive slots.
  • the UE can receive the PDSCH transmission according to the dynamic indication.
  • the UE can receive the PDSCH transmission.
  • the network receives the UL signal and/or measures the UL signal strength. In certain implementations, where the UL signal strength is higher than a pre-defined threshold, the network sends/transmits the DCI signaling to schedule the PDSCH transmission and/or indicate that the repetition of PDSCH transmission is disabled via a dynamic enabling/disabling indication of the DCI signaling as defined herein. In certain implementations, the PDSCH transmission may be transmitted once.
  • the UE can receive the PDSCH transmission according to the dynamic enabling/disabling indication (e.g., disabling) and/or the configured repetition number or offset.
  • the dynamic enabling/disabling indication e.g., disabling
  • the DCI signaling can be used to schedule the PDSCH transmission, and/or the PDSCH transmission can obey/follow legacy transmission.
  • the UE can receive the PDSCH transmission.
  • Case-3 If a threshold for PDSCH repetition is not configured, the UE may not report the repetition request/capability for PDSCH repetition. In certain implementations, whether the PDSCH transmission is repeated depends on the network configuration.
  • one repetition number or offset is configured:
  • the network receives/obtains/acquires the UL signal and/or measures the UL signal strength. In certain implementations, where the UL signal strength is lower than a pre-defined threshold, the network sends/transmits the DCI signaling to schedule the PDSCH transmission and/or indicate that the repetition is enabled for PDSCH transmission via a dynamic enabling/disabling indication of the DCI signaling as defined herein.
  • the PDSCH transmission is repeated across each resource allocation for each specified repetitionNumber (e.g., repetition number, or the repetition number of DCI signaling for scheduling the PDSCH transmission adjusted (e.g., plus or minus) by the offset) across consecutive slots.
  • the UE can receive the PDSCH transmission according to the dynamic enabling/disabling indication (e.g., enabling) and/or the configured repetition number or offset.
  • the dynamic enabling/disabling indication e.g., enabling
  • the UE can receive the PDSCH transmission.
  • the network receives the UL signal and/or performs the repetition of the PDSCH transmission across each resource allocation for each specified repetitionNumber (e.g., repetition number, or the repetition number of the DCI signaling to schedule the PDSCH transmission adjusted (e.g., plus or minus) by the offset) across consecutive slots.
  • specified repetitionNumber e.g., repetition number, or the repetition number of the DCI signaling to schedule the PDSCH transmission adjusted (e.g., plus or minus) by the offset
  • the UE can receive the PDSCH transmission according to the configured repetition number or offset.
  • the UE can receive the PDSCH transmission.
  • the UE can receive the PDSCH transmission according to the dynamic indication.
  • the UE can receive the PDSCH transmission.
  • transport block (TB) scaling may be used for PDSCH enhancement, e.g., for msg4 or other PDSCH transmissions when dedicated resources are not configured.
  • TB scaling has been supported, where the wireless communication device receives a TB scaling factor (e.g., smaller than or equal to 1) from the wireless communication node.
  • a TB scaling factor e.g., smaller than or equal to 1
  • the scaling factor is applied in the calculation of unquantized intermediate variable N info . Due to the scaling factor, a smaller N info is obtained with same MCS configuration and/or the same number of resource elements. As a result, a lower actual coding rate is obtained, which improves the PDSCH coverage performance.
  • the message is sent/transmitted when a condition is satisfied.
  • the condition may include at least one of the following: a measured reference signal received power (RSRP) of a downlink signal is lower than a configured threshold; at least one repetition number or offset is configured; a plurality of repetition numbers or offsets are configured; or/and a high layer signaling is received, indicating to the wireless communication device to send at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition.
  • RSRP measured reference signal received power
  • the defined field may include at least one of the following: a modulation and coding scheme (MCS) field, a physical uplink control channel (PUCCH) resource indicator field, a hybrid automatic request (HARQ) process number field, a PDSCH-to-HARQ feedback timing indicator field, a reserved field in the DCI signaling for scheduling the PDSCH transmission, and/or a defined field (e.g., a new field or an existing field) .
  • MCS modulation and coding scheme
  • PUCCH physical uplink control channel
  • HARQ hybrid automatic request
  • PDSCH-to-HARQ feedback timing indicator field e.g., a reserved field in the DCI signaling for scheduling the PDSCH transmission
  • a defined field e.g., a new field or an existing field
  • the wireless communication device can determine to determine (e.g., interpret) at least one of the following: the first indication, the second indication, and/or the third indication according to the defined field or the at least one CRC bit when a condition is satisfied.
  • the condition may include at least one of the following: a measured reference signal received power (RSRP) of a downlink signal is lower than a configured threshold; a measured signal state (e.g., RSRP, channel gain, etc.
  • RSRP measured reference signal received power
  • a downlink signal is lower than a second configured threshold; at least one repetition number or offset is configured; a plurality of repetition numbers or offsets are configured; the wireless communication device has sent at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition; and/or the wireless communication device is capable of the PDSCH repetition but may not have sent at least one of the request for the PDSCH repetition or the capability report for the PDSCH repetition.
  • the specific repetition number can be mapped to a number of repetitions for the PDSCH transmission.
  • the specific offset can be mapped to an offset for calculating the number of repetitions for the PDSCH transmission.
  • the third indication can be mapped to enabled or disabled repetitions for the PDSCH transmission.
  • a specific value or state in the first indication can be mapped to the specific repetition number for the PDSCH transmission.
  • a specific value or state in the second indication is mapped to the specific offset for calculating the number of repetitions for the PDSCH transmission.
  • a specific value or state in the third indication is mapped to enabled or disabled repetitions for the PDSCH transmission.
  • the wireless communication device can determine that the PDSCH repetition is disabled responsive to the repetition number having a first defined value.
  • the wireless communication device can determine that the PDSCH repetition is enabled responsive to the repetition number having a second defined value.
  • At least one aspect is directed to a system, method, apparatus, or a computer-readable medium.
  • a wireless communication node e.g., BS, gNB
  • the configuration can be determined for the PDSCH transmission.
  • any reference to an element herein using a designation such as “first, ” “second, ” and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
  • any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as “software” or a “software module) , or any combination of these techniques.
  • firmware e.g., a digital implementation, an analog implementation, or a combination of the two
  • firmware various forms of program or design code incorporating instructions
  • software or a “software module”
  • IC integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the logical blocks, modules, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device.
  • a general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine.
  • a processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or multiple microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another.
  • a storage media can be any available media that can be accessed by a computer.
  • such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • module refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.
  • memory or other storage may be employed in embodiments of the present solution.
  • memory or other storage may be employed in embodiments of the present solution.
  • any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution.
  • functionality illustrated to be performed by separate processing logic elements, or controllers may be performed by the same processing logic element, or controller.
  • references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

Landscapes

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

Abstract

L'invention concerne des systèmes et des procédés pour effectuer une amélioration de couverture de canal de liaison descendante. Un dispositif de communication sans fil peut déterminer une configuration pour la réception d'une transmission de canal partagé de liaison descendante physique (PDSCH). Le dispositif de communication sans fil peut recevoir la transmission PDSCH selon la configuration déterminée à partir d'un nœud de communication sans fil. Le nœud de communication sans fil peut envoyer la transmission PDSCH selon une configuration au dispositif de communication sans fil.
PCT/CN2024/076947 2024-02-08 2024-02-08 Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante Pending WO2025166730A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/076947 WO2025166730A1 (fr) 2024-02-08 2024-02-08 Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/076947 WO2025166730A1 (fr) 2024-02-08 2024-02-08 Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante

Publications (1)

Publication Number Publication Date
WO2025166730A1 true WO2025166730A1 (fr) 2025-08-14

Family

ID=96698890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/076947 Pending WO2025166730A1 (fr) 2024-02-08 2024-02-08 Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante

Country Status (1)

Country Link
WO (1) WO2025166730A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210037573A1 (en) * 2019-07-31 2021-02-04 Qualcomm Incorporated Two-step rach procedure for nr reduced capability ue
WO2023019548A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Indication de ressource de canal d'accès aléatoire (rach) pour équipements utilisateurs à capacité réduite et à couverture améliorée
CN116803025A (zh) * 2021-01-15 2023-09-22 中兴通讯股份有限公司 用于信道状态信息测量和报告的方法、装置和系统
CN116998215A (zh) * 2021-03-29 2023-11-03 高通股份有限公司 用于在无线通信系统中指示用于随机接入规程的覆盖增强的技术

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210037573A1 (en) * 2019-07-31 2021-02-04 Qualcomm Incorporated Two-step rach procedure for nr reduced capability ue
CN116803025A (zh) * 2021-01-15 2023-09-22 中兴通讯股份有限公司 用于信道状态信息测量和报告的方法、装置和系统
CN116998215A (zh) * 2021-03-29 2023-11-03 高通股份有限公司 用于在无线通信系统中指示用于随机接入规程的覆盖增强的技术
WO2023019548A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Indication de ressource de canal d'accès aléatoire (rach) pour équipements utilisateurs à capacité réduite et à couverture améliorée

Similar Documents

Publication Publication Date Title
EP4228353A1 (fr) Procédé et appareil de détermination de ressources
US20230413264A1 (en) Systems, methods, and non-transitory processor-readable media for indicating repetition information for retransmissions
US12166717B2 (en) Method of sound reference signal time bundling
US12219584B2 (en) System and method for resource allocation
WO2021093212A1 (fr) Système et procédé de détermination d'informations de commande de liaison latérale
US20200221307A1 (en) Inter-network access management for shared spectrum systems
WO2022151224A1 (fr) Détermination de moments où appliquer des états de faisceau pour des transmissions en liaison montante
US20230354270A1 (en) Method and apparatus for coexistence between long term evolution sidelink and new radio sidelink
US12328739B2 (en) Signaling solution for fast beam diversity
KR20210099590A (ko) 공유 스펙트럼 시스템들을 위한 자원 예약
WO2025166730A1 (fr) Systèmes et procédés pour effectuer une amélioration de couverture de canal de liaison descendante
US12250727B2 (en) Method and apparatus related to radio network temporary identifier
US20220361206A1 (en) Signaling solution on reliability enhancement for uplink transmission
CN115399050B (zh) 基于随机接入带宽的通信配置
CN118235494A (zh) 使用统一传输配置指示符状态的波束成形恢复过程
WO2022067753A1 (fr) Système et procédé pour améliorer un message de transmission en liaison montante
WO2025156091A1 (fr) Systèmes et procédés d'amélioration de couverture de réseau
WO2025091387A1 (fr) Procédés et systèmes d'indication de répétition de canal physique de contrôle de liaison montante
WO2025050397A1 (fr) Systèmes et procédés pour nœud de réseau commandé par ue
WO2025065647A1 (fr) Systèmes et procédés de détermination de ressources pour transmettre des informations de commande à un nœud intelligent
WO2025156410A1 (fr) Systèmes et procédés de réception de signal/canal commun
WO2025050390A1 (fr) Systèmes et procédés de transfert demandé par ue pour nœud de réseau
WO2025030540A1 (fr) Systèmes et procédés de détermination d'un groupe de nœuds de réseau
WO2024169013A1 (fr) Systèmes et procédés d'amélioration de couverture dans un réseau non terrestre (ntn)
WO2023206044A1 (fr) Systèmes et procédés de conception et de configuration de signalisation de référence

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24922965

Country of ref document: EP

Kind code of ref document: A1