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WO2025199980A1 - Dispositifs et procédés de communication - Google Patents

Dispositifs et procédés de communication

Info

Publication number
WO2025199980A1
WO2025199980A1 PCT/CN2024/084918 CN2024084918W WO2025199980A1 WO 2025199980 A1 WO2025199980 A1 WO 2025199980A1 CN 2024084918 W CN2024084918 W CN 2024084918W WO 2025199980 A1 WO2025199980 A1 WO 2025199980A1
Authority
WO
WIPO (PCT)
Prior art keywords
repetition
terminal device
channel quality
message
repetition number
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/CN2024/084918
Other languages
English (en)
Inventor
Li Zhang
Lin Liang
Gang Wang
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to PCT/CN2024/084918 priority Critical patent/WO2025199980A1/fr
Publication of WO2025199980A1 publication Critical patent/WO2025199980A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to method and apparatus for coverage enhancement for initial access.
  • NTN Non-Terrestrial Networks
  • FIG. 2 illustrates a signaling flow of performing a repetition of a transmission in accordance with some embodiments of the present disclosure
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such as a fe
  • the embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • SSB Synchronization Signal Block
  • NR New Radio
  • the SSB includes the Primary Synchronization Signal (PSS) , Secondary Synchronization Signal (SSS) , and the Physical Broadcast Channel (PBCH) , which together facilitate initial downlink synchronization of User Equipment (UE) with the network, cell identification, and acquisition of essential system information.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • RACH Random Access Channel
  • RAR Random Access Response
  • the term "repetition” may refer to the technique of transmitting identical data or signals multiple times within a telecommunications system to enhance transmission reliability and reception clarity, especially in challenging communication environments. For instance, in mobile networks, repetition might be utilized for crucial signaling messages or for maintaining communication quality. It is noted that example embodiments of the present disclosure are equally applicable to other repetition in other domains.
  • channel quality may refer to an overall condition and reliability of a communication channel. The term is primarily used to assess how well the channel can convey information from a sender to a receiver while considering various factors that may affect signal integrity. Channel quality is crucial in determining the effectiveness and reliability of data transmission. Key aspects influencing channel quality include signal strength, signal-to-noise ratio, and the presence of interference or distortion. It is noted that example embodiments of the present disclosure are equally applicable to other channel quality in other domains.
  • threshold may refer to a predefined limit or point of transition that, when crossed or reached, triggers a particular action, response, or change. It serves as a boundary or critical point indicating a shift in a process or state. Threshold is applied in different fields, including statistics, neuroscience, technology, and decision-making. Overall, threshold is a crucial point or level that serves as a trigger for specific actions or outcomes. It is noted that example embodiments of the present disclosure are equally applicable to other threshold in other domains.
  • RV redundancy version
  • Hybrid Automatic Repeat Request may refer to a protocol in wireless communication systems that combines high-speed forward error correction and automatic repeat request (ARQ) error-control mechanisms. This protocol is designed to enhance data transmission reliability by allowing the receiver to request retransmission of data packets that were not correctly received, while also employing error correction codes that can correct some errors without the need for retransmission.
  • ARQ automatic repeat request
  • Sounding Reference Signal may refer to a type of signal used in cellular networks to facilitate uplink channel quality measurement.
  • the SRS enables the network to assess the uplink channel conditions, such as path loss and channel fading characteristics, over a wide bandwidth.
  • NR-NTN downlink coverage enhancement includes channels and signals like PDSCH for services, for example, Voice over Internet Protocol (VoIP) , low data rate service and paging, PDSCH messages such as Msg. 2 and Msg. 4, PDSCH carrying System Information Blocks (SIBs) , e.g., SIB1, SIB19, PDCCH and broadcast PDCCH such as PDCCH of Msg. 2 and paging, and Synchronization Signal Block (SSB) .
  • SIBs System Information Blocks
  • SIB1 System Information Blocks
  • SSB Synchronization Signal Block
  • Radio Access Network Working Group 1 RAN1 will aim to identify necessary link-level enhancements for these channels in the study phase.
  • RAN1 will further discuss whether the potential link-level enhancements will be specified within Rel-19 framework.
  • the current NR-NTN framework does not provide clear guidelines on how to determine whether Msg2/Msg4 repetitions is applied, leading to potential inefficiencies in downlink coverage. Furthermore, there is a lack of how to determine the Redundancy Version (RV) for Msg2 repetition and how to indicate the repetition number for Msg2/Msg4, causing complicating the downlink communication process. Additionally, how to count the available PDSCH occasions is also a problem for optimizing downlink transmissions to be solved.
  • RV Redundancy Version
  • the present disclosure proposes a novel solution that includes Msg2/Msg4 repetition pattern that encompasses both PDCCH and PDSCH.
  • the present disclosure also includes a solution of setting thresholds for Msg2 repetitions, introducing repetition number request, RV determination, timing relationships, and differentiation for legacy and new UEs, thereby enhancing the efficiency and reliability of downlink communications in NR-NTN settings.
  • Msg4 repetition it includes a threshold to determine repetition and repetition request, and repetition number indication.
  • the proposal includes available PDSCH occasions and downlink joint estimation indications, aiming to optimize the utilization of downlink resources and improve overall network performance.
  • FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented.
  • a plurality of communication devices including a terminal device 110 and a network device 120, can communicate with each other.
  • the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE.
  • the serving area of the network device 120 may be called a cell 102.
  • the communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device.
  • terminal device 110 operating as a UE
  • network device 120 operating as a base station
  • operations described in connection with a terminal device may be implemented at a network device or other device
  • operations described in connection with a network device may be implemented at a terminal device or other device.
  • the communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like.
  • GSM Global System for Mobile Communications
  • LTE Long Term Evolution
  • LTE-Evolution LTE-Advanced
  • NR New Radio
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GERAN GSM EDGE Radio Access Network
  • MTC Machine Type Communication
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • FIG. 2 illustrates a signaling flow 200 of performing a repetition of a transmission in accordance with some embodiments of the present disclosure.
  • the signaling flow 200 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
  • a terminal device 110 obtains channel quality threshold information.
  • the terminal device 110 may receive (2005) the channel quality threshold information from the network device 120.
  • a network device 120 transmits (2005) the channel quality threshold information to the terminal device 110.
  • the channel quality threshold information indicates a channel quality threshold.
  • the channel quality threshold information may indicate a plurality of channel quality thresholds.
  • the channel quality threshold information may be transmitted in a SIB.
  • the channel quality threshold information may be transmitted via a RRC message.
  • the terminal device 110 determines (2010) at least one of: whether a repetition of a transmission from a network device 120 is needed or a repetition number of the transmission based on the channel quality threshold information and a channel quality between the terminal device 110 and the network device 120.
  • the channel quality between the network device 120 and the terminal device 110 may include a reference signal received power (RSRP) which may be measured on DL pathloss reference signals.
  • the channel quality may include a signal to inference plus noise ratio (SINR) on the channel between the network device 120 and the terminal device 110.
  • RSRP reference signal received power
  • SINR signal to inference plus noise ratio
  • the transmission may refer to a physical downlink control channel (PDCCH) transmission of an initial access procedure.
  • the transmission may refer to a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the PDSCH transmission during the random access procedure may be message 2 in the random access procedure or message 4 in the random access procedure. Example embodiments are described below with reference to different types of transmissions.
  • the terminal device 110 may determine (2007) whether the channel quality exceeds the channel quality threshold. In some embodiments, based on a determination that the channel quality is less than the channel quality threshold, the terminal device 110 determines (2010) that a repetition of the PDCCH transmission is needed. In some other embodiments, based on a determination that the channel quality is not less than or larger than the channel quality threshold, the terminal device 110 determines (2010) that the repetition of the PDCCH transmission is not needed.
  • the terminal device 110 transmits (2020) , to the network device 120, a request for the repetition using a RACH resource, based on a determination that the channel quality is less than the channel quality threshold.
  • the transmission of the request the terminal device 110 receives (2025) , from the network device 120, first information including a first repetition number of the PDCCH transmission.
  • the first information including the first repetition number may be transmitted in a SIB.
  • the first information may be transmitted via a RRC message. In this way, the amount of required RACH resources can be reduced.
  • 3C illustrates a schematic diagram of a repetition pattern for PDCCH and PDSCH of initial access, which includes multiple PDCCHs and multiple PDSCHs.
  • the repetition number may be used for PDCCH of Msg4 and fallback DCI within RRC connected state.
  • the different repetition number may be distinguished via the different RACH resources, such as the different RACH occasions or the different preambles.
  • Msg2 repetition may be as a feature similar to Msg1 repetition, i.e. msg2-Repetitions is added in the FeatureCombination-r17.
  • IE information element
  • the terminal device 110 receives (2040-1, ..., 2040-n) , from the network device 120, the message 2 based on the second repetition number.
  • the network device 120 may transmit/perform (2040-1, ..., 2040-n) the repetition of the message 2 repeatedly based on the second repetition number.
  • the second repetition number is one of: 1, 2, 4, 8, 16, or 32.
  • the different channel quality thresholds correspond to the different repetition numbers.
  • the number of channel quality threshold may be 2, 3, 4.
  • three thresholds such as threshold 1, threshold 2, threshold 3, if the RSRP of the downlink pathloss reference is less than threshold 3, all repetition numbers are applicable.
  • the RSRP of the downlink pathloss reference is less than threshold 2
  • all repetition numbers except for the highest repetition number are applicable.
  • the RSRP of the downlink pathloss reference is less than threshold 1, the lowest repetition number may be applicable.
  • the terminal device 110 determines (2007) whether the channel quality exceeds the channel quality threshold. For example, there is one RSRP threshold configured by SIB and/or RRC message. In some embodiments, the terminal device 110 determines (2010) that a repetition of the message 2 is needed, ifthe channel quality is less than the channel quality threshold. In some other embodiments, the terminal device 110 determines (2010) that the repetition of the message 2 is not needed, if the channel quality is not less than or larger than the channel quality threshold.
  • the terminal device 1 l0 may obtain the second repetition number of the message 2. For example, the terminal device 1 l0 transmits (2020) to the network device 120, a request for the second repetition number using a RACH resource, if the channel quality is less than the channel quality threshold. In this case, the network device 120 may transmit (2025) information indicating the second repetition number to the terminal device 110. In other words, the terminal device 1 l0 may receive (2025) the information indicating the second repetition number. Alternatively, the second repetition number may be predefined. In some embodiments, a second repetition number for the message 2 is the same as the first repetition number. In this case, there is the same repetition number with PDCCH repetition number.
  • the terminal device 110 receives (2040-1, ..., 2040-n) , from the network device 120, the message based on the second repetition number.
  • the network device 120 may transmit/perform (2040-1, ..., 2040-n) the repetition of the message 2 repeatedly based on the second repetition number.
  • the terminal device 110 initiates the random-access procedure using a RACH resource corresponding to the second repetition number.
  • the RACH resource corresponding to the second repetition number may include at least one of a RACH occasion corresponding to the second repetition number or a preamble corresponding to the second repetition number.
  • the terminal device may initiate the random access procedure using the RACH resource 420, as shown in the FIG. 4.
  • the terminal device 110 may receive (2025) , from the network device 120, a feature configuration indicating the second repetition number.
  • the repetition of the message 2 is used for a contention based random access (CBRA) including message 3 based system information (SI) request.
  • CBRA contention based random access
  • SI system information
  • Msg2 repetition may be used for CBRA including Msg3 based SI request.
  • the repetition of the message 2 is used for a message 1 based SI request.
  • the terminal device 110 selects the available repetition number and informs the network, and multiple repetition numbers and RACH resources for the different repetition number can be configured for Msg1 based SI request.
  • the repetition of the message 2 is used for a contention free random access (CFRA) procedure that comprises at least one of: a handover procedure or a PDCCH order.
  • Msg2 repetition may be used for CFRA procedure, such as handover, PDCCH order.
  • the repetition number for Msg2 repetition may be configured in RACH-ConfigDedicated for normal handover.
  • Conditional handover (CHO) there may be two ways may be considered.
  • the terminal device 110 may select the suitable repetition number based on the configured thresholds. Alternatively, similar to normal handover, one repetition number may be indicated.
  • Msg2 repetition number may be indicated by the following three ways, the first one is that the network configures a set of repetition numbers, and then indicate a repetition number by DCI 1_0, the second one is that the network configures a repetition number, and the third one is that repetition number is indicated by DCI 1_0.
  • the terminal device 110 may select the available repetition number based on the configured threshold. For the same RACH occasion, when the preamble is used for distinguishing the different repetition number, in some embodiments, for the same RACH occasion, the different MAC PDUs may be generated. Alternatively, for the same RACH occasion, the network device 120 may select the maximum repetition number based on the received preambles for this RACH occasion, and the repetition number is indicated by DCI 1_0.
  • the terminal device 110 receives, from the network device 120, a configuration indicating the repetition number.
  • the configuration may be transmitted via SIB and/or RRC message.
  • the terminal device 110 may receive the repetition number in DCI 1_0.
  • a default A may add a column with repetition number.
  • a parameter with repetition number may be added in PDSCH-TimeDomainResourceAllocation.
  • the repetition number is indicated via SIB/RRC and/or DCI.
  • the network device 120 may configure a set of repetition numbers and then indicate the repetition number by DCI 1_0. Alternatively, the network device 120 may configure the repetition number by SIB and/or RRC message. In some further embodiments, the network device 120 may indicate the repetition number by DCI 1_0. For DCI 1_0, 1, 2, or 3 bits within the reserved bits may be used for indicating repetition number. In some cases, if the network device 120 indicates one repetition number, such as handover, this field is considered as the reserved bits.
  • a same redundancy version (RV) is used for all repetition transmissions of the message 2.
  • RV0 may be used for all repetition transmissions.
  • RVs for repetition transmissions of the message 2 are configured by the network device 120.
  • Table 4 shows the example of the configuration.
  • the terminal device may transmit Msg3, the following PDSCH cannot be received.
  • new UE it may transmit Msg3 after receiving all PDSCH repetition transmissions. So, for legacy UE and new UE, in order to transmit Msg3, the different resources need to be reserved, which can cause resource waste.
  • a radio network temporary identity is dedicated to the terminal device 110 capable of performing the repetition of the message 2.
  • a search space is dedicated to the terminal device 110 capable of performing the repetition of the message 2.
  • the network device 120 may reserve multiple PUSCH resources.
  • RNTI there are different RNTI for legacy UE and new UE.
  • the network device 120 may configure a set of repetition number and then indicate a certain repetition number by DCI.
  • the second one is that the network device 120 may configure a repetition number.
  • the third one is that the network device 120 may indicate a repetition number by DCI.
  • DCI indication for the first one the network device 1220 may indicate the repetition number from the list by DCI 1_0.
  • the following fields such as modulation coding scheme (MCS) field, PUCCH resource indicator field, for example, with repetition factor configuration per PUCCH resource, HARQ process number filed, and HARQ process number filed may be considered.
  • MCS modulation coding scheme
  • a PDSCH occasion in the slot is not available.
  • available occasion counting for Msg2/Msg4 PDSCH since some UL slot or some UL transmission impacts, some repetition occasions may not be available. In order to increase DL coverage, available occasion counting for Msg2/Msg4 PDSCH may be introduced.
  • FIG. 5 illustrates a flowchart of a communication method 500 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 500 will be described from the perspective of the terminal device 110 in FIG. 1.
  • the terminal device 110 obtains channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds.
  • the terminal device 110 determines at least one of: whether a repetition of a transmission from a network device is needed or a repetition number of the transmission based on the channel quality threshold information and a channel quality between the terminal device and the network device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the method 500 further includes: in accordance with a determination that the transmission number of the PDCCH transmissions exceeds a number threshold, selecting a further repetition number which is higher than the repetition number.
  • the method 500 further includes: determining whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determining that a repetition of the PDCCH transmission is needed; or based on a determination that the channel quality is not less than or larger than the channel quality threshold, determining that the repetition of the PDCCH transmission is not needed.
  • the method 500 further includes: based on a determination that the channel quality is less than the channel quality threshold, transmitting, to the network device, a request for the repetition using a RACH resource; and receiving, from the network device, the PDCCH transmission based on a first repetition number.
  • the method 500 further includes: selecting a second repetition number for a message 2 of the random access procedure based on the plurality of channel quality thresholds and the channel quality, wherein each repetition number corresponds to one or more RACH resources; transmitting, to the network device, a request for the repetition using RACH resource corresponding to the second repetition number; and receiving, from the network device, the message 2 based on the second repetition number.
  • the method 500 further includes: determining whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determining that a repetition of the message 2 is needed; or based on a determination that the channel quality is not less than or larger than the channel quality threshold, determining that the repetition of the message 2 is not needed.
  • the method 500 further includes: based on a determination that the channel quality is less than the channel quality threshold, transmitting, to the network device, a request for a second repetition number using a RACH resource; and obtaining a second repetition number of the message 2, wherein the second repetition number is predefined or configured by the network device.
  • a second repetition number for the message 2 is the same as the first repetition number.
  • the second repetition number is one off 1, 2, 4, 8, 16, or 32.
  • the method 500 further includes: initiating the random access procedure using RACH resource corresponding to the second repetition number, wherein the RACH resource corresponding to the second repetition number comprises at least one of a RACH occasion corresponding to the second repetition number or a preamble corresponding to the second repetition number; and receiving, from the network device, a feature configuration indicating the second repetition number.
  • the repetition of the message 2 is used for a contention based random access (CBRA) including message 3 based system information (SI) request, or wherein the repetition of the message 2 is used for a message 1 based SI request, or wherein the repetition of the message 2 is used for a contention free random access (CFRA) procedure that comprises at least one of: a handover procedure or a PDCCH order.
  • CBRA contention based random access
  • SI system information
  • CFRA contention free random access
  • a same redundancy version is used for all repetition transmissions of the message 2, or wherein a first RV for a first repetition transmission of the message 2 is set to a predefined RV, and a RV for n-th repetition transmission of the message 2 is determined based on an association between RVs and repetition transmissions, or wherein a first RV for a first repetition transmission of the message 2 is indicated in downlink control information from the network device, and the RV for n-th repetition transmission of the message 2 is determined based on the association between RVs and repetition transmissions, or wherein RVs for repetition transmissions of the message 2 are configured by the network device.
  • RV redundancy version
  • the method 500 further includes: transmitting, to the network device, a physical uplink shared channel (PUSCH) transmission after a time duration from a reception of a last physical downlink shared channel (PDSCH) transmission; or transmitting, to the network device, a physical uplink shared channel (PUSCH) transmission after the time duration from a reception of a first PDSCH transmission.
  • PUSCH physical uplink shared channel
  • the number of channel quality thresholds in the plurality of channel quality thresholds is one of: 2, 3, or 4.
  • each channel quality threshold corresponds to a repetition number.
  • a radio network temporary identity is dedicated to the terminal device capable of performing the repetition of the message 2, or wherein a search space is dedicated to the terminal device capable of performing the repetition of the message 2.
  • the method 500 further includes: determining whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determining that a repetition of a message 4 of the random access procedure is needed; and transmitting, to the network device, a request for a third repetition number for the message 4.
  • the request for the third repetition number is informed based on a logical channel identity related to the repetition, or wherein the request for the third repetition number is using a RACH resource related to the repetition.
  • a modulation coding scheme field in the downlink control information indicates the repetition number, or wherein a PUCCH resource indicator field in the downlink control information indicates the repetition number, or wherein a hybrid automatic repeat request (HARQ) process number field in the downlink control information indicates the repetition number, or wherein a feedback timing indication filed in the downlink control information indicates the repetition number.
  • HARQ hybrid automatic repeat request
  • the method 500 further includes: receiving, from the network device, a configuration indicating the repetition number; or receiving, from the network device, downlink control information indicating the repetition number.
  • a PDSCH occasion in the slot is not available.
  • t the method 500 further includes: receiving the channel quality threshold information from the network device.
  • FIG. 6 illustrates a flowchart of a communication method 600 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the network device 120 in FIG. 1.
  • the network device 120 transmits, to a terminal device, channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds.
  • the network device 120 performs a repetition of a transmission to the terminal device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the method 600 further includes: receiving, from the terminal device, a request for the repetition using a RACH resource corresponding to a first repetition number for the PDCCH transmission that is selected based on the plurality of channel quality thresholds and the channel quality; and transmitting, to the terminal device, the PDCCH transmission based on the first repetition number.
  • the method 600 further includes: based on a determination that the channel quality is less than the channel quality threshold, receiving, from the terminal device, a request for the repetition using a RACH resource; and transmitting, to the terminal device, the PDCCH transmission based on a first repetition number.
  • the method 600 further includes: receiving, from the terminal device, a request for the repetition using a RACH resource corresponding to a second repetition number for a message 2 of the random access procedure that is selected based on the plurality of channel quality thresholds and the channel quality; and transmitting, to the terminal device, the message 2 based on the second repetition number.
  • the method 600 further includes: based on a determination that the channel quality is less than the channel quality threshold, receiving, from the terminal device, a request for a second repetition number using a RACH resource; and transmitting, to the terminal device, information indicating the second repetition number.
  • a second repetition number for the message 2 is the same as the first repetition number.
  • the second repetition number is one of: 1, 2, 4, 8, 16, or 32.
  • the method 600 further includes: receiving a request for initiating the random access procedure using a RACH resource corresponding to the second repetition number, wherein the RACH resource corresponding to the second repetition number comprises at least one of a RACH occasion corresponding to the second repetition number or a preamble corresponding to the second repetition number; and transmitting, to the terminal device, a feature configuration indicating the second repetition number.
  • the repetition of the message 2 is used for a contention based random access (CBRA) including message 3 based system information (SI) request, or wherein the repetition of the message 2 is used for a message 1 based SI request, or wherein the repetition of the message 2 is used for a contention free random access (CFRA) procedure that comprises at least one of: a handover procedure or a PDCCH order.
  • CBRA contention based random access
  • SI system information
  • CFRA contention free random access
  • a same redundancy version is used for all repetition transmissions of the message 2, or wherein a first RV for a first repetition transmission of the message 2 is set to a predefined RV, and a RV for n-th repetition transmission of the message 2 is determined based on an association between RVs and repetition transmissions, or wherein a first RV for a first repetition transmission of the message 2 is indicated in downlink control information from the network device, and the RV for n-th repetition transmission of the message 2 is determined based on the association between RVs and repetition transmissions, or wherein RVs for repetition transmissions of the message 2 are configured by the network device.
  • RV redundancy version
  • the method 600 further includes: receiving, from the terminal device, a physical uplink shared channel (PUSCH) transmission after a time duration from a reception of a last physical downlink shared channel (PDSCH) transmission; or receiving, from the terminal device, a physical uplink shared channel (PUSCH) transmission after the time duration from a reception of a first PDSCH transmission.
  • PUSCH physical uplink shared channel
  • the number of channel quality thresholds in the plurality of channel quality thresholds is one of: 2, 3, or 4.
  • each channel quality threshold corresponds to a repetition number.
  • a radio network temporary identity is dedicated to the terminal device capable of performing the repetition of the message 2, or wherein a search space is dedicated to the terminal device capable of performing the repetition of the message 2.
  • the method 600 further includes: receiving, from the terminal device, a request for a third repetition number for a message 4 during the random access procedure.
  • the request for the third repetition number is informed based on a logical channel identity related to the repetition, or wherein the request for the third repetition number is using a RACH resource related to the repetition.
  • the method 600 further includes: transmitting, to the terminal device, a configuration comprising a set of repetition numbers; and transmitting, to the terminal device, downlink control information indicating the repetition number from the set of repetition numbers.
  • the method 600 further includes: transmitting, to the terminal device, a configuration indicating the repetition number; or transmitting, to the terminal device, downlink control information indicating the repetition number.
  • a PDSCH occasion in the slot is not available.
  • FIG. 7 is a simplified block diagram of a device 700 that is suitable for implementing embodiments of the present disclosure.
  • the device 700 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 700 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
  • the device 700 includes a processor 710, a memory 720 coupled to the processor 710, a suitable transceiver 740 coupled to the processor 710, and a communication interface coupled to the transceiver 740.
  • the memory 720 stores at least a part of a program 730.
  • the transceiver 740 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 740 may include at least one of a transmitter 742 and a receiver 744.
  • the transmitter 742 and the receiver 744 may be functional modules or physical entities.
  • the transceiver 740 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • RN relay node
  • Uu interface for communication between the eNB/gNB and a terminal device.
  • the program 730 is assumed to include program instructions that, when executed by the associated processor 710, enable the device 700 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 7.
  • the embodiments herein may be implemented by computer software executable by the processor 710 of the device 700, or by hardware, or by a combination of software and hardware.
  • the processor 710 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 710 and memory 720 may form processing means 750 adapted to implement various embodiments of the present disclosure.
  • the memory 720 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 720 is shown in the device 700, there may be several physically distinct memory modules in the device 700.
  • the processor 710 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 700 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • a terminal device comprising a circuitry.
  • the circuitry is configured to: obtain channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and determine at least one off whether a repetition of a transmission from a network device is needed or a repetition number of the transmission based on the channel quality threshold information and a channel quality between the terminal device and the network device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
  • a network device comprising a circuitry.
  • the circuitry is configured to: transmit, to a terminal device, channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and perform a repetition of a transmission to the terminal device, wherein the transmission comprises at least one off a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the circuitry may be configured to perform any method implemented by the network device as discussed above.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • a terminal apparatus comprises means for obtaining channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and means for determining at least one of: whether a repetition of a transmission from a network device is needed or a repetition number of the transmission based on the channel quality threshold information and a channel quality between the terminal device and the network device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the first apparatus may comprise means for performing the respective operations of the method 500.
  • the first apparatus may further comprise means for performing other operations in some example embodiments of the method 500.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • a network apparatus comprises means for transmitting, to a terminal device, channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and means for performing a repetition of a transmission to the terminal device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • the second apparatus may comprise means for performing the respective operations of the method 600.
  • the second apparatus may further comprise means for performing other operations in some example embodiments of the method 600.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • embodiments of the present disclosure provide the following aspects.
  • a terminal device comprising: a processor, configured to cause the terminal device to: obtain channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and determine at least one of: whether a repetition of a transmission from a network device is needed or a repetition number of the transmission based on the channel quality threshold information and a channel quality between the terminal device and the network device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the terminal device is caused to: select a first repetition number for the PDCCH transmission of the initial access procedure based on the plurality of channel quality thresholds and the channel quality, wherein each repetition number corresponds to a random access channel (RACH) resource; transmit, to the network device, a request for the repetition using a RACH resource corresponding to the first repetition number; and receive, from the network device, the PDCCH transmission based on the first repetition number.
  • RACH random access channel
  • the terminal device is caused to: in accordance with a determination that the transmission number of the PDCCH transmissions exceeds a number threshold, select a further repetition number which is higher than the repetition number.
  • the terminal device is caused to: determine whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determine that a repetition of the PDCCH transmission is needed; or based on a determination that the channel quality is not less than or larger than the channel quality threshold, determine that the repetition of the PDCCH transmission is not needed.
  • the terminal device is caused to: based on a determination that the channel quality is less than the channel quality threshold, transmit, to the network device, a request for the repetition using a RACH resource; and receive, from the network device, first information including a first repetition number of the PDCCH transmission.
  • the terminal device is caused to: select a second repetition number for a message 2 of the random access procedure based on the plurality of channel quality thresholds and the channel quality, wherein each repetition number corresponds to a RACH resource; transmit, to the network device, a request for the repetition using a RACH resource corresponding to the second repetition number; and receive, from the network device, the message 2 based on the second repetition number.
  • the terminal device is caused to: determine whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determine that a repetition of the message 2 is needed; or based on a determination that the channel quality is not less than or larger than the channel quality threshold, determine that the repetition of the message 2 is not needed.
  • the terminal device is caused to: based on a determination that the channel quality is less than the channel quality threshold, transmit, to the network device, a request for a second repetition number using a RACH resource; and obtain a second repetition number of the message 2, wherein the second repetition number is predefined or configured by the network device.
  • a second repetition number for the message 2 is the same as the first repetition number.
  • the second repetition number is one off 1, 2, 4, 8, 16, or 32.
  • the terminal device is caused to: initiate the random access procedure using a RACH resource corresponding to the second repetition number, wherein the RACH resource corresponding to the second repetition number comprises at least one of a RACH occasion corresponding to the second repetition number or a preamble corresponding to the second repetition number; and receive, from the network device, a feature configuration indicating the second repetition number.
  • the repetition of the message 2 is used for a contention based random access (CBRA) including message 3 based system information (SI) request, or wherein the repetition of the message 2 is used for a message 1 based SI request, or wherein the repetition of the message 2 is used for a contention free random access (CFRA) procedure that comprises at least one of: a handover procedure or a PDCCH order.
  • CBRA contention based random access
  • SI system information
  • CFRA contention free random access
  • a same redundancy version is used for all repetition transmissions of the message 2, or wherein a first RV for a first repetition transmission of the message 2 is set to a predefined RV, and a RV for n-th repetition transmission of the message 2 is determined based on an association between RVs and repetition transmissions, or wherein a first RV for a first repetition transmission of the message 2 is indicated in downlink control information from the network device, and the RV for n-th repetition transmission of the message 2 is determined based on the association between RVs and repetition transmissions, or wherein RVs for repetition transmissions of the message 2 are configured by the network device.
  • RV redundancy version
  • the terminal device is caused to: transmit, to the network device, a physical uplink shared channel (PUSCH) transmission after a time duration from a reception of a last physical downlink shared channel (PDSCH) transmission; or transmit, to the network device, a physical uplink shared channel (PUSCH) transmission after the time duration from a reception of a first PDSCH transmission.
  • PUSCH physical uplink shared channel
  • the number of channel quality thresholds in the plurality of channel quality thresholds is one of: 2, 3, or 4.
  • each channel quality threshold corresponds to a repetition number.
  • a radio network temporary identity is dedicated to the terminal device capable of performing the repetition of the message 2, or wherein a search space is dedicated to the terminal device capable of performing the repetition of the message 2.
  • the terminal device is caused to: determine whether the channel quality exceeds the channel quality threshold; based on a determination that the channel quality is less than the channel quality threshold, determine that a repetition of a message 4 of the random access procedure is needed; and transmit, to the network device, a request for a third repetition number for the message 4.
  • the request for the third repetition number is informed based on a logical channel identity related to the repetition, or wherein the request for the third repetition number is using a RACH resource related to the repetition.
  • the terminal device is caused to: receive, from the network device, a configuration comprising a set of repetition numbers; and receive, from the network device, downlink control information indicating the repetition number from the set of repetition numbers.
  • a modulation coding scheme field in the downlink control information indicates the repetition number, or wherein a PUCCH resource indicator field in the downlink control information indicates the repetition number, or wherein a hybrid automatic repeat request (HARQ) process number field in the downlink control information indicates the repetition number, or wherein a feedback timing indication filed in the downlink control information indicates the repetition number.
  • HARQ hybrid automatic repeat request
  • the terminal device is caused to: receive, from the network device, a configuration indicating the repetition number; or receive, from the network device, downlink control information indicating the repetition number.
  • a PDSCH occasion in the slot is not available.
  • the terminal device is caused to: receive the channel quality threshold information from the network device.
  • a network device comprising: a processor, configured to cause the network device to: transmit, to a terminal device, channel quality threshold information, wherein the measurement result threshold information indicates a channel quality threshold or a plurality of channel quality thresholds; and perform a repetition of a transmission to the terminal device, wherein the transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission of an initial access procedure, or a physical downlink shared channel (PDSCH) transmission during a random access procedure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the network device is caused to: receive, from the terminal device, a request for the repetition using a RACH resource corresponding to a first repetition number for the PDCCH transmission that is selected based on the plurality of channel quality thresholds and the channel quality; and transmit, to the terminal device, the PDCCH transmission based on the first repetition number.
  • the network device is caused to: based on a determination that the channel quality is less than the channel quality threshold, receive, from the terminal device, a request for the repetition using a RACH resource; and transmit, to the terminal device, first information including a first repetition number of the PDCCH transmission.
  • the terminal device is caused to: receive, from the terminal device, a request for the repetition using a RACH resource corresponding to a second repetition number for a message 2 of the random access procedure that is selected based on the plurality of channel quality thresholds and the channel quality; and transmit, to the terminal device, the message 2 based on the second repetition number.
  • the network device is caused to: based on a determination that the channel quality is less than the channel quality threshold, receive, from the terminal device, a request for a second repetition number using a RACH resource; and transmit, to the terminal device, information indicating the second repetition number.
  • a second repetition number for the message 2 is the same as the first repetition number.
  • the second repetition number is one of: 1, 2, 4, 8, 16, or 32.
  • the network device is caused to: receive a request for initiating the random access procedure using a RACH resource corresponding to the second repetition number, wherein the RACH resource corresponding to the second repetition number comprises at least one of a RACH occasion corresponding to the second repetition number or a preamble corresponding to the second repetition number; and transmit, to the terminal device, a feature configuration indicating the second repetition number.
  • the repetition of the message 2 is used for a contention based random access (CBRA) including message 3 based system information (SI) request, or wherein the repetition of the message 2 is used for a message 1 based SI request, or wherein the repetition of the message 2 is used for a contention free random access (CFRA) procedure that comprises at least one of: a handover procedure or a PDCCH order.
  • CBRA contention based random access
  • SI system information
  • CFRA contention free random access
  • a same redundancy version is used for all repetition transmissions of the message 2, or wherein a first RV for a first repetition transmission of the message 2 is set to a predefined RV, and a RV for n-th repetition transmission of the message 2 is determined based on an association between RVs and repetition transmissions, or wherein a first RV for a first repetition transmission of the message 2 is indicated in downlink control information from the network device, and the RV for n-th repetition transmission of the message 2 is determined based on the association between RVs and repetition transmissions, or wherein RVs for repetition transmissions of the message 2 are configured by the network device.
  • RV redundancy version
  • the network device is caused to: receive, from the terminal device, a physical uplink shared channel (PUSCH) transmission after a time duration from a reception of a last physical downlink shared channel (PDSCH) transmission; or receive, from the terminal device, a physical uplink shared channel (PUSCH) transmission after the time duration from a reception of a first PDSCH transmission.
  • PUSCH physical uplink shared channel
  • the number of channel quality thresholds in the plurality of channel quality thresholds is one of: 2, 3, or 4.
  • each channel quality threshold corresponds to a repetition number.
  • a radio network temporary identity is dedicated to the terminal device capable of performing the repetition of the message 2, or wherein a search space is dedicated to the terminal device capable of performing the repetition of the message 2.
  • the network device is caused to: receive, from the terminal device, a request for a third repetition number for a message 4 during the random access procedure.
  • the request for the third repetition number is informed based on a logical channel identity related to the repetition, or wherein the request for the third repetition number is using a RACH resource related to the repetition.
  • the network device is caused to: transmit, to the terminal device, a configuration comprising a set of repetition numbers; and transmit, to the terminal device, downlink control information indicating the repetition number from the set of repetition numbers.
  • a modulation coding scheme field in the downlink control information indicates the repetition number, or wherein a PUCCH resource indicator field in the downlink control information indicates the repetition number, or wherein a hybrid automatic repeat request (HARQ) process number field in the downlink control information indicates the repetition number, or wherein a feedback timing indication filed in the downlink control information indicates the repetition number.
  • HARQ hybrid automatic repeat request
  • the network device is caused to: transmit, to the terminal device, a configuration indicating the repetition number; or transmit, to the terminal device, downlink control information indicating the repetition number.
  • a PDSCH occasion in the slot is not available.
  • a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
  • a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 7.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

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Abstract

Des modes de réalisation de la présente divulgation concernent une solution d'amélioration de couverture en vue d'un accès initial. Dans une solution, un dispositif terminal obtient des informations de seuil de qualité de canal, les informations de seuil de résultat de mesure indiquant un seuil de qualité de canal ou une pluralité de seuils de qualité de canal ; et détermine : si une répétition d'une transmission à partir d'un dispositif de réseau est nécessaire ou non, et/ou un nombre de répétitions de la transmission, sur la base des informations de seuil de qualité de canal et d'une qualité de canal entre le dispositif terminal et le dispositif de réseau, la transmission comprenant : une transmission de canal physique de commande de liaison descendante (PDCCH) d'une procédure d'accès initial, et/ou une transmission de canal physique partagé de liaison descendante (PDSCH) pendant une procédure d'accès aléatoire.
PCT/CN2024/084918 2024-03-29 2024-03-29 Dispositifs et procédés de communication Pending WO2025199980A1 (fr)

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