WO2022237613A1 - Procédé de réception d'un signal de liaison descendante exécuté par un équipement utilisateur et équipement utilisateur - Google Patents

Procédé de réception d'un signal de liaison descendante exécuté par un équipement utilisateur et équipement utilisateur Download PDF

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Publication number
WO2022237613A1
WO2022237613A1 PCT/CN2022/090935 CN2022090935W WO2022237613A1 WO 2022237613 A1 WO2022237613 A1 WO 2022237613A1 CN 2022090935 W CN2022090935 W CN 2022090935W WO 2022237613 A1 WO2022237613 A1 WO 2022237613A1
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WIPO (PCT)
Prior art keywords
signal
csi
pdsch
resource
user equipment
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PCT/CN2022/090935
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English (en)
Chinese (zh)
Inventor
马小骏
罗超
刘仁茂
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夏普株式会社
马小骏
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Publication of WO2022237613A1 publication Critical patent/WO2022237613A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the technical field of wireless communication, and in particular to a method executed by user equipment and corresponding user equipment.
  • the present invention provides a method executed by user equipment and the user equipment.
  • the conflict between the data transmission and the reference signal is avoided, so that the power consumption of the terminal is reduced, the receiving ability is improved, and the user experience is improved. and other benefits, as well as improving the service capability of the network and expanding the compatibility of the network, the cost of communication network deployment is greatly reduced.
  • a method performed by a user equipment UE including: receiving an indication for indicating a channel state information reference signal CSI-RS resource or resource set;
  • the RE used by the indication signal is not used for the transmission of the PDSCH signal or uses predetermined power for the transmission of the PDSCH signal.
  • the resource used by the CSI-RS indicated in the indication signal is not used for PDSCH signal transmission.
  • the resource used by the CSI-RS is the resource element RE used by the CSI-RS signal determined according to the indication signal.
  • the user equipment is in an idle state or an inactive state.
  • the user equipment receives the state indication signal, and determines the state of the CSI-RS reference signal.
  • the resource element RE used by the CSI-RS determined to be valid or available by the user equipment is not used for the transmission of the PDSCH signal.
  • the user equipment is in an active state, and the user equipment determines that resource elements RE used by the CSI-RS are not used for transmission of PDSCH signals.
  • the indication signal it is determined that the resources used by the indicated CSI-RS use predetermined power for PDSCH signal transmission.
  • the resource used by the CSI-RS is the resource element RE used by the CSI-RS signal determined according to the indication signal.
  • the user equipment is in an idle state or an inactive state.
  • the user equipment receives the state indication signal, and determines the state of the CSI-RS reference signal.
  • the resource element RE used by the user equipment determined to be a valid or usable CSI-RS uses predetermined power for PDSCH signal transmission.
  • the predetermined power is zero power.
  • a method performed by a user equipment UE including: receiving a system information block signal indicating a channel state information reference signal CSI-RS resource or a resource set; receiving a scheduling indication signal of a downlink data transmission channel PDSCH ; and according to the received indication signal, determine that the resource used by the PDSCH signal for data transmission does not receive the CSI-RS signal.
  • a user equipment including: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.
  • the terminal by receiving the reference signal, the terminal can further obtain accurate measurement, more sleep time and better signal receiving ability, etc., thereby reducing the power consumption of the terminal and improving the receiving ability, thereby improving the The business capability of the network and the expansion of the compatibility of the network greatly reduce the cost of communication network deployment.
  • FIG. 1 is a flow chart illustrating a downlink signal receiving method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram for explaining the relationship of using RE resources between different downlink signals.
  • Fig. 3 is a flowchart for illustrating a downlink signal receiving method according to an embodiment of the present invention.
  • Fig. 4 is a schematic diagram for explaining bandwidth relationships among different downlink signals.
  • FIG. 5 is a flow chart illustrating a downlink signal receiving method according to an embodiment of the present invention.
  • Fig. 6 is a block diagram schematically showing a user equipment involved in the present invention.
  • the 5G/NR mobile communication system and its subsequent evolution versions are taken as an example application environment, and multiple implementations according to the present invention are described in detail.
  • the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G, 802.11 wireless networks, etc.
  • the terms involved in the present invention are described below, and the terms involved in the present invention are defined here unless otherwise specified.
  • the terms given by the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and subsequent or other communication systems, but the present invention adopts a unified term, and when applied to a specific system When in , it can be replaced by the term used in the corresponding system.
  • 3GPP 3rd Generation Partnership Project
  • the third generation partnership project the third generation partnership project
  • LTE Long Term Evolution, long-term evolution technology
  • UE User Equipment, user equipment
  • gNB NR base station
  • FR1 Frequency range 1 as defined in TS 38.104, frequency range 1 defined by TS38.104
  • FR2 Frequency range 2 as defined in TS 38.104, frequency range 2 defined by TS38.104
  • TTI Transmission Time Interval, transmission time interval
  • OFDM Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing
  • CP-OFDM Cyclic Prefix Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing with cyclic prefix
  • C-RNTI Cell Radio Network Temporary Identifier, cell radio network temporary identifier
  • P-RNTI Paging RNTI, paging wireless network temporary identifier
  • RA-RNTI Random Access RNTI, random access wireless network temporary identifier
  • CS-RNTI Configured Scheduling RNTI, configure scheduling wireless network temporary identifier
  • SI-RNTI System Information RNTI, System Information Wireless Network Temporary Identification
  • TC-RNTI Temporary C-RNTI, temporary cell wireless network temporary identifier
  • CSI Channel State Information, channel state information
  • CSI-RS Channel State Information Reference Signal, channel state information reference signal
  • PBCH Physical broadcast channel, physical broadcast channel
  • PUCCH Physical Uplink Control Channel, physical uplink control channel
  • PUSCH Physical Uplink Shared Channel, physical uplink shared channel
  • PRACH Physical random-access channel, physical random access channel
  • PDSCH Physical downlink shared channel, physical downlink shared channel
  • PDCCH Physical downlink control channel, physical downlink control channel
  • UL-SCH Uplink Shared Channel, uplink shared channel
  • DL-SCH Downlink Shared Channel, Uplink Shared Channel
  • RACH random-access channel, random access channel
  • DCI Downlink Control Information, downlink control information
  • MCS Modulation and Coding Scheme
  • RB Resource Block, resource block
  • CRB Common Resource Block, public resource block
  • CP Cyclic Prefix, cyclic prefix
  • PRB Physical Resource Block, physical resource block
  • VRB Virtual resource block, virtual resource block
  • FDM Frequency Division Multiplexing, Frequency Division Multiplexing
  • TDD Time Division Duplexing, Time Division Duplex
  • FDD Frequency Division Duplexing, Frequency Division Duplex
  • SRS Sounding Reference Signal, sounding reference signal
  • DMRS Demodulation Reference Signal, demodulation reference signal
  • CSI-RS Channel state information reference signal
  • CRC Cyclic Redundancy Check, Cyclic Redundancy Check
  • SIB system information block, system information block
  • SIB1 System Information Block Type 1, system information block type 1
  • PSS Primary Synchronization Signal, primary synchronization signal
  • SSS Secondary Synchronization Signal, secondary synchronization signal
  • MIB Master Information Block, master information block
  • SSB Synchronization Signal Block, Synchronization System Information Block
  • BWP BandWidth Part, bandwidth fragment/part
  • RedCap Device Reduced Capability Device, reduced capacity device
  • SCS sub-carrier spacing, subcarrier spacing
  • EPRE Energy per resource element, energy per resource unit
  • a network device is a device for communicating with a terminal, including but not limited to a base station device, gNB, eNB, wireless AP, etc., which will not be specifically distinguished and limited in the following.
  • the base station can also be used as a form of network equipment for description, and can be easily replaced by other network equipment forms.
  • the terminals in the network can be divided into different states, such as connected (connected) state, idle (idle) state and inactive (inactive) state.
  • a user in the connected state establishes a wireless connection with the network for data transmission or related business processing.
  • the terminal in the idle state or the inactive state also maintains a certain connection with the network. For example, the terminal needs to monitor broadcast messages and paging messages sent by the network according to relevant configurations or parameters, or perform related measurements.
  • the processing of users in the idle state and the inactive state is similar in many aspects.
  • the relevant actions for the terminal or network in the idle state can also be applied to the inactive state. terminal.
  • other user states that have similar requirements to the idle state can also be handled by analogy, and will not be detailed one by one.
  • the terminal can be in a sleep state to save power consumption.
  • the terminal can be in different sleep modes.
  • the light sleep mode is used for a short sleep when there are new signals to be processed in a short period of time.
  • the deep sleep mode which is used when the terminal has no new signal to process for a long period of time, and can reduce the power consumption of the terminal more than the light sleep mode.
  • putting the terminal in sleep mode can effectively reduce the power consumption of the terminal, thereby improving user experience.
  • the terminal can adjust the automatic gain control (AGC) parameters, so that the processed data is within its appropriate dynamic range, so as to obtain a better reception effect.
  • AGC automatic gain control
  • the terminal needs to perform time-frequency tracking, estimate the time offset or frequency offset parameters of the signal according to the reference signal, and perform corresponding corrections to the signal or data to be processed to obtain better reception performance.
  • the terminal may also perform some other processing to optimize data processing, improve user experience, etc., which will not be described here.
  • the terminal can use the reference signal sent by the network to perform preprocessing. For example, the terminal may perform related actions such as time-frequency synchronization according to one or more synchronization signals.
  • the network configures and sends reference signals to the terminal, which are used for channel measurement, channel parameter estimation, mobility assessment, spatial parameter estimation, etc. of the terminal to realize functions such as radio resource management and auxiliary data signal reception.
  • the terminal may receive the synchronization reference signal sent by the network, and perform AGC adjustment or time-frequency parameter estimation.
  • the terminal may receive the CSI-RS signal sent by the network to perform channel measurement or beam management.
  • the network configures and sends the CSI-RS reference signal for the terminal to perform functions such as channel measurement and beam management.
  • CSI-RS signal parameters can be configured to the UE in the form of CSI-RS resources, and one terminal can be configured with one or more CSI-RS resources.
  • One or more CSI-RSs can also form a CSI-RS resource set, and one terminal can be configured with one or more resource sets.
  • a CSI-RS signal is defined in each CSI-RS resource, which may include multiple configuration parameters, such as one or more of time-frequency resource configuration, power configuration, code division parameter configuration, QCL configuration, and frequency domain density parameters.
  • the terminal can determine and receive the CSI-RS signal according to the configured parameters, and use it for functions such as measurement or signal reception, for example, receive the CSI-RS signal at multiple time-frequency positions according to the configured period and offset.
  • the CSI-RS can be divided into multiple types, for example, the NZP-CSI-RS is a CSI-RS with non-zero power, that is, the transmission power of the CSI-RS is not zero.
  • CSI-RS can also be divided into periodic, semi-permanent and non-periodic signal types.
  • the periodic CSI-RS means that after the configuration takes effect, the associated CSI-RS resource appears repeatedly on the time-frequency resource at a certain period.
  • the semi-permanent and aperiodic CSI-RS resources need to be activated through MAC-CE or DCI indication.
  • the terminal can implement different functions according to different CSI-RS resources and related report indications.
  • the CSI-RS signal used for time-frequency tracking (Tracking) may also be called TRS.
  • TRS time-frequency tracking
  • CSI-RS is uniformly used as a synonym for CSI-RS of different types or parameters applicable to the present invention, or other signals that can realize similar functions.
  • the network sends the SSB signal at a certain period, and the SSB may include various reference signals, such as SSS and PSS.
  • the network can use spatial filters or beams for signal transmission and reception.
  • the beams used in the network may be analog beams or digital beams or a mixture of the two.
  • the network uses corresponding beams to send SSBs. For example, the network uses 8 beams to send SSBs, then the SSBs in the sending cycle can be numbered as SSB0 to SSB7, which respectively represent SSBs sent using different beams.
  • the terminal can select the best beam for signal reception or transmission according to different locations, so as to achieve better communication.
  • the network can also use different beams and terminals to send and receive signals to achieve good communication effects.
  • the CSI-RS signal sent by the network may be sent using a beam, and the network may configure a reference signal of the CSI-RS to indicate a signal that satisfies a QCL relationship with it.
  • the network can configure a CSI-RS resource and a certain SSB i to meet a certain QCL type, and the terminal can consider that the SSB i is the same as certain channel parameters of the CSI-RS. If there are other signals and SSB i on the terminal side that meet the QCL, the terminal can obtain relevant parameters through the reception or measurement of the CSI-RS, and apply them to the reception of the signal.
  • the CSI-RS signal is transmitted using a certain time-frequency resource according to the configuration and instructions of the network.
  • the network configures the starting position and bandwidth of the CSI-RS, and then the CSI-RS is transmitted on the PRB determined according to the configuration.
  • the network can configure the frequency domain density and frequency domain allocation parameters of the CSI-RS, and the terminal can determine which REs the CSI-RS occupies on the RB for transmission according to the configuration.
  • the CSI-RS can use some REs in the RB in the frequency domain. For example, if the frequency domain density parameter used by the CSI-RS is 3, then among the 12 REs determined by one symbol and one RB, 3 REs are used for transmission of the CSI-RS signal.
  • the remaining REs are not used for transmission of CSI-RS signals.
  • the number of REs used by the CSI-RS signal on the RB can be determined by configuration parameters, for example, a 4-bit bitmap is used to determine which of the 4 REs are used for the transmission of the CSI-RS signal.
  • the network can configure the period and offset parameters, and the terminal can determine parameters such as the time slot and symbol transmission of the CSI-RS signal transmitted on the radio frame according to the configuration.
  • the network can also configure several other parameters, and the terminal can determine the characteristics of the CSI-RS signal according to the relevant configuration, and use it for related reception or measurement.
  • a terminal in an idle state or an inactive state needs to periodically receive network broadcast or paging information, or perform related measurements. For example, before receiving paging information, the terminal can receive the reference signal sent by the network according to its own capabilities, channel conditions and other factors, perform AGC, time-frequency tracking and other processing, and receive the corresponding data signal, so as to obtain good results. Due to various internal or external factors, the number of times or the duration of waking up from the sleep mode is different when the terminal performs these preprocessing. For example, when the channel condition is poor, the reception quality of the relevant reference signal is poor, or when the processing capability of the terminal is limited, the terminal needs to wake up multiple times to receive multiple reference signals, so as to achieve better reception effect. For another example, the configured reference signal is far from the signal to be received, and the terminal may also need to receive the reference signal more times or maintain a longer active time to obtain a better receiving effect.
  • a user terminal in an idle state or an inactive state can use the SSB to implement related AGC or time-frequency parameter estimation.
  • the period and time-frequency position of SSB are often fixed, which may not meet the requirements of users to receive signals and reduce power consumption. Therefore, the network can provide additional reference signals for terminal reception, so that terminals can obtain the required parameters faster or information, thereby reducing the time or frequency of wake-ups to achieve better energy-saving effects.
  • the network can configure the CSI-RS signal to be used as a reference signal for idle or inactive users. For example, the network configures a group of non-zero power CSI-RS signals in the SIB broadcast information, which are used as reference signals for idle or inactive users.
  • the network can use the CSI-RS signal sent to the users in the connected state to share with the users in the idle state.
  • the network may configure one or more CSI-RS resources for users in the idle state, and some or all of the resources may also be signals for users in the connected state. If the connected user no longer uses these resources, the network can partially or completely turn off these CSI-RS signals according to different situations, so as to reduce power consumption on the network side.
  • the network may adjust the sending CSI-RS configuration or start or stop signaling according to the adjustment of the user in the connected state or power saving or other reasons. At this time, the idle state needs to be notified. The user adjusts or configures the parameters so that the user in the idle state can receive signals correctly.
  • the network may indicate the state of the configured CSI-RS resources by sending indication information. For example, the network may indicate the available or unavailable status of the CSI-RS resource through physical layer or high layer signaling.
  • the status of the associated CSI-RS signal is indicated once through the physical layer signaling, and the status of the CSI-RS signal at multiple time-frequency positions may also be indicated through the physical layer signaling.
  • the terminal determines whether the relevant CSI-RS signal is available for related processing according to the indication information and other parameters that may be required, that is, determines whether the configured CSI-RS signal is valid or usable at a certain time-frequency position.
  • a unit of time-frequency resources in NR is a time slot, and a time slot contains 14 (Normal CP scenario) or 12 (Extended CP scenario) OFDM symbols.
  • Resources in a time slot can be further divided into resource blocks and resource units.
  • the resource block RB can be defined in the frequency domain as consecutive subcarriers, for example, for a subcarrier spacing (SCS) of 15kHz, the RB is 180kHz in the frequency domain.
  • SCS subcarrier spacing
  • a resource element RE represents one subcarrier in the frequency domain and one OFDM symbol in the time domain.
  • ⁇ can take an integer value from 0 to 4 under different configurations. Signals within the bandwidth can be numbered according to the SCS used.
  • the PRBs in the frequency domain within the bandwidth range may be numbered as 0, 1, 2, ..., N_BWP_ ⁇ , so as to determine the position of the corresponding resource in the bandwidth.
  • Different signals on the same bandwidth in NR may use the same or different SCS parameters, and the time-frequency resources used by different signals overlap in both the time domain and the frequency domain. It can be considered that these resources used by the signals overlap.
  • the base station can use certain frequency domain and time domain resources to send PDSCH signals to the terminal.
  • the time-frequency resources and other parameters used by the PDSCH signal can be indicated by higher layers or by physical layer signaling.
  • the base station can instruct the terminal to receive the PDSCH signal at the time-frequency position through the PDCCH. For example, the base station may instruct an idle or inactive terminal to receive PDSCH paging information by paging the PDCCH.
  • the terminal can also receive the PDSCH signal on the time-frequency resource according to the preconfigured parameters of the upper layer.
  • the time-frequency resource determined by the terminal according to the PDSCH configuration parameters may overlap with the time-frequency resource used by other signals. For example, certain symbols and RB resources used by the CSI-RS partially or completely overlap with symbols and RB resources used by the PDSCH. Then the terminal needs to determine the transmission of the PDSCH on the time-frequency resource according to different indications, parameters such as configurations or scenarios.
  • Fig. 1 is a flowchart illustrating a method performed by a user equipment according to an embodiment of the present invention.
  • step S101 an indication signal for indicating a CSI-RS resource or a resource set is received, and a transmission resource of a CSI-RS signal is determined.
  • step S102 receiving indication signaling for indicating the state of the CSI-RS signal, and determining the state of the CSI-RS signal.
  • step S103 the signaling for scheduling the PDSCH is received, and the resources used by the PDSCH are determined.
  • step S104 the terminal determines resources used by the PDSCH signal for data transmission and/or power used for transmitting the PDSCH signal according to the received indication signal.
  • the network can configure CSI-RS resources through the system information block for reception of idle or inactive users. For example, the network sends configuration parameters of CSI-RS resources or resource sets for idle or inactive users through a system broadcast message.
  • the terminal can obtain some or all parameters of the CSI-RS signal according to the configuration parameters, for example, it can determine the time-frequency position, bandwidth, density and other parameters used by the CSI-RS signal.
  • the network can also indicate the status of these CSI-RS signals through higher layer or physical layer signaling. For example, the network may indicate that one or more CSI-RS signals are active or available. Indicates that the activated or available CSI-RS signal is transmitted on the time-frequency resource determined by the configuration parameters.
  • the network can also indicate that one or more CSI-RS signals are in an inactive or unavailable state, and the CSI-RS signals in an inactive or unavailable state are not transmitted on time-frequency resources, or the terminal should not consider it to be in an inactive or unavailable state.
  • a CSI-RS signal using corresponding configuration parameters is received on the time-frequency resource corresponding to the CSI-RS.
  • the terminal may determine the state of the CSI-RS signal according to the instruction of the network, for example, receiving an indication signaling may indicate that one or more CSI-RS signals are available on one or more associated time slots. According to the instructions of the network, the terminal can determine the relevant time-frequency resource parameters and transmit the CSI-RS on these time-frequency resources.
  • the idle or inactive terminal can determine the transmission of the PDSCH signal on the time-frequency resource according to the instruction of the network. For example, the terminal receives an indication of the PDCCH scrambled by the P-RNTI, and determines that the network schedules the paging PDSCH to be received. Or, the terminal receives the PDCCH scrambled by the RA-RNTI, determines that the network has scheduled the related access PDSCH to be received, and so on. The terminal can also receive the PDSCH transmission determined by other indications, and the terminal can determine the time-frequency resources used by the PDSCH according to the information indicated by the network.
  • the time-frequency resources used by the configured or indicated active or effective CSI-RS may partially or completely overlap with the time-frequency resources used by the PDSCH scheduled by the network.
  • the terminal determines the transmission of the PDSCH signal on the overlapped resources.
  • the CSI-RS uses some REs for transmission, and the terminal can determine the transmission of the PDSCH signal on the RB according to relevant instructions.
  • the REs of the active or valid CSI-RS signal determined by the terminal in the idle or inactive state are not used for transmission of PDSCH data.
  • the terminal in idle or inactive state may receive the CSI-RS signal using some or all resources of the symbols and RBs on the symbols and RBs used by the PDSCH signal.
  • the terminal determines that symbols used by the PDSCH and RBs include resource REs used by the CSI-RS signal, and the terminal does not use these REs for PDSCH data transmission. Not transmitting the PDSCH on the RE used by the CSI-RS can enable the codec module of the PDSCH to obtain an appropriate code rate parameter, so that the system can obtain a good signal transmission effect while avoiding mutual signal interference.
  • the terminal in idle or inactive state uses configured or predetermined power to transmit PDSCH data on REs indicated as active or valid CSI-RS signals.
  • the predetermined power used is zero power, and the base station sends the PDSCH on these REs using EPRE with a value of 0.
  • the predetermined power is determined according to the ratio of the predetermined value to the EPRE of the DMRS.
  • the terminal determines the ratio of the EPRE of the PDSCH to the EPRE of the DMRS as -80dB according to the configuration, and the network uses the ratio and the EPRE value of the DMRS to determine the PDSCH transmit power value on these REs.
  • the terminal determines the received power of the PDSCH according to the received DMRS signal power.
  • Using a predetermined power to transmit PDSCH data on the RE used by CSI-RS is beneficial to ensure forward compatibility, and realize coordinated transmission of various signals with little impact on system performance, so that the system can obtain good signal transmission Effect.
  • the PDSCH uses the resource scheduled by the PDCCH scrambled by any one of SI-RNTI, P-RNTI, RA-RNTI or TC-RNTI.
  • the CSI-RS signal and the PDSCH use the same QCL reference.
  • the SSB number associated with the CSI-RS is the same as the reference signal indicated by the TCI information used by the PDSCH.
  • the QCL type used by the CSI-RS is the same as the QCL type of the reference signal indicated by the PDSCH and TCI information.
  • the CSI-RS signal can be used to realize fast time-frequency synchronization to achieve the best performance of the system.
  • Fig. 3 is a flowchart illustrating a method performed by a user equipment according to one embodiment of the present invention.
  • step S201 an indication signal for indicating a CSI-RS resource or a resource set is received, and a transmission resource of a CSI-RS signal is determined.
  • step S202 receiving indication signaling for indicating the state of the CSI-RS signal, and determining the state of the CSI-RS signal.
  • step S203 the signaling for scheduling the PDSCH is received, and the resources used by the PDSCH are determined.
  • step S204 the terminal determines that the resource used by the PDSCH signal for data transmission is not used for CSI-RS signal transmission.
  • the network can configure CSI-RS resources through the system information block for reception of idle or inactive users. For example, the network sends configuration parameters of CSI-RS resources for idle or inactive users through a system broadcast message.
  • the terminal can obtain some or all parameters of the CSI-RS signal according to the configuration parameters, for example, it can determine the time-frequency position, bandwidth, density and other parameters used by the CSI-RS signal.
  • the network can also indicate the status of these CSI-RS signals through higher layer or physical layer signaling. For example, the network may indicate that one or more CSI-RS signals are active or available.
  • the activated or available CSI-RS signal is transmitted on the time-frequency resource configured or indicated by the configuration parameter.
  • the network can also indicate that one or more CSI-RS signals are inactive, and the inactive CSI-RS signals are not transmitted on the time-frequency resources, or the terminal does not expect to be transmitted on the time-frequency resources corresponding to the inactive CSI-RS
  • the CSI-RS signal using the corresponding configuration parameters is received on the .
  • the terminal may determine the validity of the CSI-RS signal according to the instruction of the network, for example, using an activation signaling to indicate the validity of one or more CSI-RS signals on one or more associated time slots. According to the instructions of the network, the terminal can determine the relevant time-frequency resource parameters and transmit the CSI-RS on these time-frequency resources.
  • the idle or inactive terminal can determine the transmission of the PDSCH signal on the time-frequency resource according to the instruction of the network. For example, the terminal receives an indication of the PDCCH scrambled by the P-RNTI, and determines that the network schedules the paging PDSCH to be received. Or, the terminal receives the PDCCH scrambled by the RA-RNTI, determines that the network has scheduled the related access PDSCH to be received, and so on. The terminal can determine the time-frequency resources used by the PDSCH according to the information indicated by the PDCCH.
  • the time-frequency resources used by the configured or indicated activated or valid CSI-RS may partially or completely overlap with the time-frequency resources used by the PDSCH scheduled by the network.
  • the CSI-RS signal bandwidth configured and indicated by the network as activated or available overlaps with the PDSCH bandwidth scheduled by the network to be received by the user on the same OFDM symbol.
  • the terminal in the idle or inactive state does not receive the CSI-RS indicated as active or valid, which has overlapping resources with the PDSCH signal received by the user scheduled by the network.
  • the terminal should not consider the CSI-RS signal overlapping with at least one RB used by the PDSCH on the symbol used by the PDSCH as an available or effective reference signal.
  • the idle or inactive terminal does not receive the CSI-RS signal on the PRB overlapping with the PDSCH.
  • the terminal shall not regard the CSI-RS signal overlapping with the RB used by the PDSCH on the symbol used by the PDSCH as an available or valid reference signal.
  • the terminal may receive part or all of the CSI-RS signal indicated as active or valid and not overlapping with the RB used by the PDSCH.
  • the terminal in the idle or inactive state does not receive the CSI-RS indicated as active or valid on a resource overlapping with the PDSCH signal received by the user scheduled by the network.
  • the terminal does not expect to receive the CSI-RS signal overlapping the PRB used by the PDSCH on the symbol used by the PDSCH.
  • the PDSCH uses the resource scheduled by the PDCCH scrambled by any one of SI-RNTI, P-RNTI, RA-RNTI or TC-RNTI.
  • the CSI-RS signal is a CSI-RS that uses the same QCL information as the PDSCH.
  • the SSB number associated with the CSI-RS is the same as the reference signal indicated by the TCI information used by the PDSCH.
  • the QCL type used by the CSI-RS is the same as the QCL type of the reference signal indicated by the PDSCH and TCI information.
  • the CSI-RS and the PDSCH use the same SCS.
  • the CSI-RS and the PDSCH use different SCSs.
  • the terminal determines that the PRBs and symbols used by it have an overlapping relationship.
  • a user in the connected state establishes a connection with the network for uplink or downlink data transmission.
  • the network can configure CSI-RS signals for connected users through dedicated signaling, which is used for connected users to perform signal measurement and channel estimation.
  • the CSI-RS signal configured by the network for the user in the connected state may use the same or different time-frequency resources as the CSI-RS signal configured by the network in the system information block.
  • the terminal in the connected state When the terminal in the connected state is configured with a CSI-RS signal that has the same time-frequency position as the CSI-RS in the system information block, or when a CSI-RS signal that includes the time-frequency position of the CSI-RS in the system information block is configured, the terminal The CSI-RS configuration parameters configured according to the dedicated signaling can avoid mutual interference between the data transmission channel and the CSI-RS signal.
  • the user terminal in the connected state does not configure the CSI-RS signal including the CSI-RS time-frequency resource in a system information block through dedicated signaling, the user needs to determine the transmission of the PDSCH signal according to the CSI-RS configuration in the system information block.
  • Fig. 5 is a flowchart illustrating a method performed by a user equipment according to an embodiment of the present invention.
  • step S301 an indication signal for indicating a CSI-RS resource or a resource set is received, and a transmission resource of a CSI-RS signal is determined.
  • step S303 the signaling for scheduling the PDSCH is received, and the resources used by the PDSCH are determined.
  • step S304 the terminal determines the resource used by the PDSCH signal for data transmission and/or the power used for transmitting the PDSCH signal according to the received indication signal.
  • the time-frequency resources used by the RS signals partially or completely overlap.
  • the user in the connected state does not use the time-frequency resource RE used by the CSI-RS signal configured in the system information block to perform PDSCH transmission.
  • the user terminal determines that symbols used by the PDSCH and RBs include resource REs used by CSI-RS signals, and the user terminal does not use these REs for PDSCH data transmission.
  • the user in the connected state uses configured or predetermined power to transmit PDSCH data on the time-frequency resource RE used by the CSI-RS signal configured in the system information block.
  • the predetermined power used is zero power, and the base station sends the PDSCH on these REs using EPRE with a value of 0.
  • the predetermined power is determined according to the ratio of the predetermined value to the EPRE of the DMRS. For example, the terminal determines that the ratio of the EPRE of the PDSCH to the EPRE of the DMRS is -80dB according to the configuration, and the network uses the ratio and the EPRE value of the DMRS to determine the PDSCH transmit power value. The terminal determines the received power of the PDSCH according to the received DMRS signal power.
  • the user in the connected state does not use the time-frequency resource RE configured in the system information block and indicated as an activated or valid CSI-RS to perform PDSCH transmission.
  • the user terminal determines that symbols used by the PDSCH and RBs include resource REs used by CSI-RS signals, and the user terminal does not use these REs for PDSCH data transmission.
  • the user in the connected state uses the configured or predetermined power to transmit PDSCH data on the time-frequency resource RE configured in the system information block and indicated as the activated or valid CSI-RS signal.
  • the predetermined power used is zero power, and the base station sends the PDSCH on these REs using EPRE with a value of 0.
  • the predetermined power is determined according to the ratio of the predetermined value to the EPRE of the DMRS. For example, the terminal determines that the ratio of the EPRE of the PDSCH to the EPRE of the DMRS is -80dB according to the configuration, and the network uses this ratio and the EPRE value of the DMRS to determine the PDSCH transmit power value. The terminal determines the received power of the PDSCH according to the received DMRS signal power.
  • the PDSCH uses resources scheduled by the PDCCH scrambled by any one of C-RNTI, P-RNTI, and CS-RNTI.
  • the CSI-RS resource is a CSI-RS that uses the same QCL reference as the PDSCH.
  • the SSB number associated with the CSI-RS is the same as the reference signal indicated by the TCI information used by the PDSCH.
  • the QCL type used by the CSI-RS is the same as the QCL type of the reference signal indicated by the PDSCH and TCI information.
  • the CSI-RS and the PDSCH use the same SCS.
  • the CSI-RS and the PDSCH use different SCSs.
  • the terminal determines that the PRBs and symbols used by it have an overlapping relationship.
  • FIG. 6 illustrate a user equipment that can execute the method performed by the user equipment described above in detail in the present invention as a modification example.
  • FIG. 6 is a block diagram showing a user equipment UE according to the present invention.
  • the user equipment UE100 includes a processor 101 and a memory 102 .
  • the processor 101 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 102 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories.
  • Program instructions are stored on the memory 102 . When the instruction is executed by the processor 101, the above method described in detail in the present invention and executed by the user equipment may be executed.
  • the method and related equipment of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the embodiments described above can be combined with each other without conflicts.
  • the method of the present invention is not limited to the steps and sequence shown above.
  • the network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for the base station, MME, or UE, and the like.
  • the various identifiers shown above are only exemplary rather than restrictive, and the present invention is not limited to specific information elements as examples of these identifiers. Numerous variations and modifications may be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • various components inside the base station and user equipment in the above embodiments can be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Devices, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.
  • DSP digital signal processing
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • base station may refer to a mobile communication data and control switching center with relatively large transmission power and wide coverage area, including functions such as resource allocation and scheduling, data reception and transmission.
  • User equipment may refer to a user's mobile terminal, including, for example, a mobile phone, a notebook, and other terminal equipment capable of wirelessly communicating with a base station or a micro base station.
  • embodiments of the present invention disclosed herein may be implemented on a computer program product.
  • the computer program product is a product having a computer-readable medium encoded with computer program logic that, when executed on a computing device, provides associated operations to implement Above-mentioned technical scheme of the present invention.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to execute the operations (methods) described in the embodiments of the present invention.
  • Such arrangements of the invention are typically provided as software, code and/or other data structures arranged or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk, or as one or more other media of firmware or microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc.
  • Software or firmware or such configurations can be installed on the computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.
  • each functional module or each feature of the base station device and terminal device used in each of the above embodiments may be implemented or executed by a circuit, and the circuit is generally one or more integrated circuits.
  • Circuits designed to perform the various functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs), or other possible Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above.
  • a general-purpose processor can be a microprocessor, or the processor can be an existing processor, controller, microcontroller, or state machine.
  • the general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit.
  • the present invention can also use an integrated circuit obtained by using the advanced technology.

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

Abstract

Est divulgué dans la présente invention un procédé de réception d'un signal de liaison descendante exécuté par un équipement utilisateur et un équipement utilisateur. Le procédé de réception d'un signal de liaison descendante exécuté par un équipement utilisateur comprend les étapes suivantes : réception d'une indication pour indiquer une ressource ou un ensemble de ressources de signal de référence d'informations d'état de canal, CSI-RS; et, sur la base de l'indication reçue, détermination selon laquelle la ressource utilisée par le signal d'indication n'est pas utilisée pour la transmission d'un signal PDSCH ou utilise une puissance prédéterminée pour la transmission du signal PDSCH.
PCT/CN2022/090935 2021-05-10 2022-05-05 Procédé de réception d'un signal de liaison descendante exécuté par un équipement utilisateur et équipement utilisateur WO2022237613A1 (fr)

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CN202110508160.7 2021-05-10
CN202110508160.7A CN115333696A (zh) 2021-05-10 2021-05-10 由用户设备执行的接收下行信号的方法以及用户设备

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CN109831932A (zh) * 2016-08-10 2019-05-31 交互数字专利控股公司 用于多天线系统中的非周期性测量参考信号传输的系统和方法
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CN112005519A (zh) * 2018-04-06 2020-11-27 高通股份有限公司 用于非周期性csi-rs的pdsch速率匹配
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CN112005519A (zh) * 2018-04-06 2020-11-27 高通股份有限公司 用于非周期性csi-rs的pdsch速率匹配
CN112586054A (zh) * 2018-08-17 2021-03-30 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111083741A (zh) * 2018-10-18 2020-04-28 华为技术有限公司 资源配置方法、速率匹配方法及传输接收点、终端

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