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WO2021066389A1 - Procédé et dispositif pour déterminer une priorité entre une demande de planification pour un rapport de défaillance de faisceau de cellule secondaire (scell) et d'autres transmissions en liaison montante dans un système de communication sans fil - Google Patents

Procédé et dispositif pour déterminer une priorité entre une demande de planification pour un rapport de défaillance de faisceau de cellule secondaire (scell) et d'autres transmissions en liaison montante dans un système de communication sans fil Download PDF

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Publication number
WO2021066389A1
WO2021066389A1 PCT/KR2020/012952 KR2020012952W WO2021066389A1 WO 2021066389 A1 WO2021066389 A1 WO 2021066389A1 KR 2020012952 W KR2020012952 W KR 2020012952W WO 2021066389 A1 WO2021066389 A1 WO 2021066389A1
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WIPO (PCT)
Prior art keywords
data
transmitting
beam failure
transmit
resource
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Ceased
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PCT/KR2020/012952
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English (en)
Korean (ko)
Inventor
장재혁
에기월아닐
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from KR1020190122321A external-priority patent/KR102911086B1/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of WO2021066389A1 publication Critical patent/WO2021066389A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06964—Re-selection of one or more beams after beam failure
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient

Definitions

  • the present invention relates to a method of determining priority between a scheduling request for SCell beam failure report and other uplink transmission in a wireless communication system.
  • the 5G communication system or the pre-5G communication system is called a communication system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE).
  • the 5G communication system is being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Giga (60 GHz) band).
  • mmWave ultra-high frequency
  • 5G communication systems include beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO). ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.
  • FD-MIMO Full Dimensional MIMO
  • array antenna analog beam-forming, and large scale antenna technologies are being discussed.
  • cloud RAN cloud radio access network
  • D2D Device to Device communication
  • wireless backhaul moving network
  • CoMP Coordinatd Multi-Points
  • interference cancellation And other technologies are being developed.
  • ACM advanced coding modulation
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC Small Cellular Cellular System
  • FBMC Filter Bank Multi Carrier
  • NOMA non orthogonal multiple access
  • SCMA sparse code multiple access
  • IoT Internet of Things
  • M2M Machine Type Communication
  • MTC Machine Type Communication
  • SR scheduling request
  • a method for controlling a terminal includes the steps of detecting a beam failure in a secondary cell (scell); Checking whether a resource for transmitting a scheduling request (SR) related to the detected beam failure overlaps in time with a resource for transmitting data; And when the resource for transmitting the SR overlaps in time with the resource for transmitting the data, determining to transmit one of the SR and the data. Including, wherein the determining step, when the resource for transmitting the SR overlaps in time with the resource for transmitting the data, determining to transmit the SR related to the detected beam failure have.
  • SR scheduling request
  • a terminal includes a transceiver; And whether a resource for detecting a beam failure in a secondary cell (scell) and transmitting a scheduling request (SR) related to the detected beam failure overlaps in time with a resource for transmitting data.
  • a control unit configured to determine to transmit one of the SR and the data when the resource for transmitting the SR overlaps in time with the resource for transmitting the data; And when the resource for transmitting the SR overlaps in time with the resource for transmitting the data, the control unit may determine to transmit the SR related to the detected beam failure.
  • the terminal when a scheduling request (SR) transmitted to make a transmission resource request and data transmission overlap, the terminal can easily determine the priority.
  • SR scheduling request
  • FIG. 1 is a diagram illustrating a structure of an LTE system referred to for description of the present invention.
  • FIG. 2 is a diagram showing a radio protocol structure of an LTE system referred to for description of the present invention.
  • FIG 3 is an exemplary diagram of a downlink and uplink channel frame structure when communication is performed based on a beam in an NR system.
  • FIG. 4 is an exemplary diagram for an operation sequence of a terminal performing SR transmission for a SCell BFR MAC Control Element (CE).
  • CE MAC Control Element
  • FIG. 5 is a diagram illustrating an exemplary block configuration of a terminal according to an embodiment of the present invention.
  • FIG. 6 is a block diagram illustrating an exemplary configuration of a base station according to an embodiment of the present invention.
  • FIG. 7 is a flowchart illustrating a method of controlling a terminal according to an embodiment of the present invention.
  • each block of the flowchart diagrams and combinations of the flowchart diagrams may be executed by computer program instructions. Since these computer program instructions can be mounted on the processor of a general purpose computer, special purpose computer or other programmable data processing equipment, the instructions executed by the processor of the computer or other programmable data processing equipment are described in the flowchart block(s). It creates a means to perform functions.
  • These computer program instructions can also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular way, so that the computer-usable or computer-readable memory It is also possible for the instructions stored in the flow chart to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block(s). Since computer program instructions can also be mounted on a computer or other programmable data processing equipment, a series of operating steps are performed on a computer or other programmable data processing equipment to create a computer-executable process to create a computer or other programmable data processing equipment. It is also possible for instructions to perform processing equipment to provide steps for executing the functions described in the flowchart block(s).
  • each block may represent a module, segment, or part of code that contains one or more executable instructions for executing the specified logical function(s).
  • the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or the blocks may sometimes be executed in the reverse order depending on the corresponding function.
  • the term' ⁇ unit' used in this embodiment refers to software or hardware components such as FPGA or ASIC, and' ⁇ unit' performs certain roles.
  • The' ⁇ unit' may be configured to be in an addressable storage medium, or may be configured to reproduce one or more processors.
  • ' ⁇ unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.
  • components and functions provided in the' ⁇ units' may be combined into a smaller number of elements and' ⁇ units', or may be further separated into additional elements and' ⁇ units'.
  • components and' ⁇ units' may be implemented to play one or more CPUs in a device or a security multimedia card.
  • a term for identifying an access node used in the following description a term for network entities, a term for messages, a term for an interface between network objects, a term for various identification information And the like are illustrated for convenience of description. Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having an equivalent technical meaning may be used.
  • the present invention uses terms and names defined in the 3GPP The 3rd Generation Partnership Project Long Term Evolution (LTE) standard, which is the most up-to-date among currently existing communication standards.
  • LTE Long Term Evolution
  • the present invention is not limited by the terms and names, and may be equally applied to systems conforming to other standards.
  • the present invention can be applied to 3GPP NR (New Radio: 5th generation mobile communication standard).
  • FIG. 1 is a diagram illustrating a structure of an LTE system referred to for description of the present invention.
  • the wireless communication system includes several base stations (1-05) (1-10) (1-15) (1-20) and MME (Mobility Management Entity) (1-20) and S -It is composed of GW (Serving-Gateway)(1-30).
  • UE or terminal User equipment (hereinafter referred to as UE or terminal) (1-35) is external through the base station (1-05) (1-10) (1-15) (1-20) and S-GW (1-30). Connect to the network.
  • the base stations (1-05) (1-10) (1-15) (1-20) are access nodes of a cellular network and provide wireless access to terminals accessing the network. That is, the base station (1-05) (1-10) (1-15) (1-20) collects status information such as buffer status, available transmission power status, and channel status of terminals to service users' traffic. Thus, the scheduling is performed to support connection between the terminals and the core network (CN).
  • the MME 1-25 is a device in charge of various control functions as well as a mobility management function for a terminal, and is connected to a plurality of base stations
  • the S-GW 1-30 is a device that provides a data bearer.
  • the MME (1-25) and the S-GW (1-30) can further perform authentication, bearer management, etc. for a terminal accessing the network, and the base station 1-05 Processes a packet arriving from (1-10)(1-15)(1-20) or a packet to be delivered to the base station (1-05)(1-10)(1-15)(1-20).
  • FIG. 2 is a diagram showing a radio protocol structure of an LTE system referred to for description of the present invention.
  • the NR to be defined in the future may be partially different from the radio protocol structure in this drawing, but will be described for convenience of description of the present invention.
  • the radio protocol of the LTE system is PDCP (Packet Data Convergence Protocol) (2-05) (2-40), RLC (Radio Link Control) (2-10) (2-35) in the terminal and the ENB, respectively. ), MAC (Medium Access Control) (2-15) (2-30).
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • PDU Packet Data Unit
  • the MAC (2-15) (2-30) is connected to several RLC layer devices configured in one terminal, and performs an operation of multiplexing RLC PDUs to MAC PDUs and demultiplexing RLC PDUs from MAC PDUs.
  • the physical layer (2-20) (2-25) channel-codes and modulates the upper layer data, converts it into OFDM symbols, and transmits it to the radio channel, or demodulates and channel-decodes the OFDM symbol received through the radio channel to the upper layer. It does the act of delivering.
  • the physical layer also uses HARQ (Hybrid ARQ) for additional error correction, and the receiving end transmits whether or not the packet transmitted by the transmitting end is received in 1 bit.
  • HARQ Hybrid ARQ
  • HARQ ACK/NACK information Downlink HARQ ACK/NACK information for uplink transmission is transmitted through a PHICH (Physical Hybrid-ARQ Indicator Channel) physical channel, and uplink HARQ ACK/NACK information for downlink transmission is PUCCH (Physical Uplink Control Channel) or PUSCH. (Physical Uplink Shared Channel) It can be transmitted through a physical channel.
  • the PUCCH is used for the UE to transmit not only the HARQ ACK/NACK information, but also downlink channel status information (CSI, Channel Status Information), scheduling request (SR, Scheduling Request), and the like to the base station.
  • CSI Physical Uplink Control Channel
  • SR Scheduling Request
  • the SR is 1-bit information, and when a terminal transmits an SR to a resource in a PUCCH set by a base station, the base station recognizes that there is data to be transmitted by the corresponding terminal in an uplink, and allocates an uplink resource.
  • the UE may transmit a detailed buffer status report (BSR) message through the uplink resource.
  • BSR buffer status report
  • the base station can allocate a plurality of SR resources to one terminal.
  • the PHY layer may consist of one or a plurality of frequencies/carriers, and a technology in which a plurality of frequencies are simultaneously set and used by one base station is referred to as a carrier aggregation technology (carrier aggreagation, hereinafter referred to as CA).
  • CA technology refers to using only one carrier for communication between a terminal (or user equipment, UE) and a base station (eNB of LTE or gNB of NR), and additionally using a primary carrier and one or a plurality of subcarriers. it means. Accordingly, the amount of transmission can be dramatically increased by the number of additionally used subcarriers.
  • a cell in a base station using a primary carrier is called a PCell (Primary Cell), and a subcarrier is called a SCell (Secondary Cell).
  • PCell Primary Cell
  • SCell Secondary Cell
  • a technology in which the CA function is extended to two base stations is referred to as dual connectivity technology (hereinafter referred to as DC).
  • DC dual connectivity technology
  • the terminal is simultaneously connected to a primary base station (Master E-UTRAN NodeB, hereinafter referred to as MeNB) and a secondary base station (Secondary E-UTRAN NodeB, hereinafter referred to as SeNB).
  • MeNB Master E-UTRAN NodeB
  • SeNB secondary base station
  • MCG master cell group
  • SCG secondary cell group
  • PCell primary cell
  • PSCell primary secondary cell
  • RRC Radio Resource Control
  • RRC Radio Resource Control
  • FIG 3 is an exemplary diagram of a downlink and uplink channel frame structure when communication is performed based on a beam in an NR system.
  • the base station (3-01) transmits a signal in the form of a beam in order to transmit a wider coverage or stronger signal (3-11)(3-13)(3-15)(3-17). Accordingly, the terminal (3-03) in the cell must transmit and receive data using a specific beam transmitted by the base station (beam #1 (3-13) in this example drawing).
  • the state of the terminal is divided into a dormant mode (RRC_IDLE) and a connection mode (RRC_CONNECTED). Accordingly, the base station does not know the location of the terminal in the dormant mode.
  • the terminal sends a synchronization block (SSB) transmitted by the base station (3-21)(3-23)(3-25)(3-27). ) Can be received.
  • This SSB is an SSB signal periodically transmitted according to a period set by the base station, and each SSB is a Primary Synchronization Signal (PSS) (3-41), a Secondary Synchronization Signal (SSS) (3 -43) and Physical Broadcast Channel (PBCH).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • SSB#0 (3-21) transmits using beam #0 (3-11)
  • SSB#1 (3-23) transmits using beam #1 (3-13).
  • transmission using beam #2 (3-15) in case of SSB#2 (3-25)
  • transmission using beam #3 (3-17) in case of SSB#3 (3-27)
  • the terminal receives SSB #1 transmitted through beam #1.
  • the terminal acquires a physical cell identifier (PCI) of the base station through PSS and SSS, and by receiving the PBCH, the identifier of the currently received SSB (i.e., #1) and the current SSB It is possible to determine not only which position within a 10 ms frame is received, but also which SFN within the System Frame Number (SFN) having a period of 10.24 seconds.
  • a master information block (MIB) is included in the PBCH.
  • the MIB includes information indicating at which location the system information block type 1 (SIB1), which broadcasts more detailed cell configuration information, can be received.
  • the terminal Upon receiving SIB1, the terminal can know the total number of SSBs transmitted by the base station, and can perform random access to transition to the connected mode state (e.g., physically designed specifically for uplink synchronization
  • the UE recognizes the location of the PRACH occasion (3-32)(3-33) for SSB#1, and accordingly, the current time among the PRACH Occasions (3-32)(3-33) corresponding to SSB#1
  • the random access preamble can be transmitted with the fastest PRACH Occasion in (e.g. (3-32)). Since the base station has received the preamble in the PRACH Occasion of (3-32), it can be seen that the corresponding terminal has transmitted the preamble by selecting SSB#1. Accordingly, when performing subsequent random access, data is transmitted and received through the corresponding beam. can do.
  • the terminal when the connected terminal moves from the current (source) base station to the target (target) base station for reasons such as handover, the terminal performs random access at the target base station, and transmits random access by selecting the SSB as described above. You can perform the operation that you do.
  • a handover command is transmitted to the terminal to move from the source base station to the target base station, and in this case, the message is dedicated to the corresponding terminal for each SSB of the target base station so that it can be used when performing random access at the target base station.
  • a random access preamble identifier can be assigned.
  • the base station may not allocate a dedicated random access preamble identifier for all beams (depending on the current location of the terminal, etc.), and thus, a dedicated random access preamble may not be allocated to some SSBs (e.g., Beam Dedicated random access preamble assigned to #2 and #3 only). If the UE does not have a dedicated random access preamble assigned to the SSB selected for preamble transmission, random access may be performed by randomly selecting a contention-based random access preamble.
  • SSBs e.g., Beam Dedicated random access preamble assigned to #2 and #3 only.
  • a scenario in which a UE is located in Beam #1 and performs random access for the first time, but after a failure, is located in Beam #3 and transmits a dedicated preamble when transmitting the random access preamble again is possible.
  • preamble retransmission occurs even within one random access procedure, depending on whether a dedicated random access preamble is allocated to the selected SSB for each preamble transmission, a contention-based random access procedure and a contention-based random access procedure May be mixed.
  • the UE in the connected state is set up as a message of the RRC layer to tell the base station to detect beam failure for the SSBs corresponding to beam #1 (3-13) and beam #2 (3-15).
  • the physical layer of the terminal can transmit a beam failure instance indication to the MAC layer of the terminal. have.
  • the MAC layer receiving the beam failure occurrence notification starts a beam failure detection timer (or restarts if the beam failure detection timer has already been driven), and may increase the counter (BFI_COUNTER) by 1. If the counter value reaches the threshold (beamFailureInstanceMaxCount) set by the message of the RRC layer (e.g., equal to or greater than), the terminal concludes that a beam failure has occurred and can perform a procedure to recover the beam failure. Yes (beam failure recovery, BFR).
  • the beam failure may occur in PCell or SCell.
  • PCell when a low frequency that hardly uses a beam is used, and a high frequency that uses a narrow beam in the SCell is used, a beam failure may occur in the SCell.
  • the terminal can recover using a random access procedure. For example, the base station can allocate a dedicated random access preamble for each beam in preparation for a beam failure to the terminal.For example, if a dedicated preamble identifier is set for beam #3 in this drawing, the terminal detects a beam failure. When beam #3 is selected when performing random access afterwards, the corresponding dedicated preamble identifier is transmitted to immediately inform the base station that the corresponding terminal has selected beam #3 by detecting a beam failure, so that the base station transmits the beam for the corresponding terminal. You can make it adjustable. Alternatively, even if the dedicated random access preamble is not allocated, the terminal may perform contention-based random access to inform the base station that the corresponding terminal is present in the selected beam during the current random access.
  • the UE may notify the fact that the beam failure has occurred in a certain SCell by transmitting a MAC Control Element (MAC CE), a control message of the MAC layer. More specifically, the MAC CE may include additional information on which SCell has a beam failure and which beam of the corresponding SCell should be used. In order to transmit the MAC CE, the UE needs to request uplink resources from the base station.
  • MAC CE MAC Control Element
  • Uplink resource requests in the existing LTE and NR are made by transmitting a buffer status report (BSR) MAC CE, and in the case of a regular BSR (Regular BSR) among the conditions in which the BSR transmission is triggered, a scheduling request By triggering (Scheduling Request, SR), 1-bit information is transmitted to the base station in the PUCCH resource allocated for the SR previously allocated as a message of the RRC layer, so that the base station can allocate uplink for transmitting the BSR. have.
  • BSR buffer status report
  • SR scheduling request By triggering
  • the BSR is classified as follows according to the conditions under which transmission is triggered.
  • the BSR retransmission timer (retxBSR-Timer) is BSR sent when expired
  • Truncated BSR is transmitted
  • Regular BSR is intended to trigger SR.
  • regular BSR occurs according to the above conditions, it is determined in which logical channel the regular BSR is generated due to data. Accordingly, when there is an SR configuration mapped to a corresponding logical channel, the corresponding SR can be transmitted.
  • the base station may assume a scenario in which three SRs are set to the UE, and SR #1 maps to LCH x and LCH y, and SR #2 to LCH z.
  • LCH, x, y, and z have priorities 1,2,3, if there is traffic only in LCH z in the buffer and data is generated in LCH y, a regular BSR is triggered due to LCH y, Accordingly, SR #1 is triggered.
  • the MAC CE eg, SCell BFR MAC CE
  • the Regular BSR cannot be triggered.
  • the message size difference is not large compared to the BSR MAC CE, it may be unnecessary to transmit the BSR MAC CE to transmit the SCell BFR MAC CE.
  • the base station may allocate uplink resources at a time when 1-bit scheduling request information transmitted through the PUCCH is transmitted.
  • the UE cannot simultaneously transmit the PUCCH and data (Physical Uplink Shared CHannel: PUSCH: This is used to transmit the UL-SCH).
  • the PUCCH is not transmitted, and data Can only be transmitted.
  • factory automation considered as an operation scenario of 5G and traffic with very high priority occurs suddenly, SR mapped to the traffic with very high priority (logical channel) rather than generating previously generated data. It may be more important to allow the base station to allocate an uplink for transmission of the corresponding traffic by transmitting.
  • the base station may set the UE as an RRC layer message to determine which one to transmit by comparing the priority between the data to be transmitted and the logical channel mapped to the SR to be transmitted. Accordingly, only when it is set to perform the corresponding determination operation, the terminal may determine which transmission and which are not transmitted when the PUCCH and the PUSCH overlap in time as described above.
  • the UE must determine whether to transmit SR or data for this when transmitting SCell BFR MAC CE.
  • the following schemes are proposed in a situation in which the UE needs to make a determination when PUCCH and PUSCH resources overlap as described above.
  • the first scheme is a scheme for always prioritizing the SR for transmitting the SCell BFR MAC CE. Since this is a situation in which communication in the SCell is interrupted, it can be used under the judgment that the SCell should be restored with priority over other data transmission. In this case, uplink data transmission overlapping in time with the SR for transmitting the SCell BFR MAC CE is not performed.
  • the second method is a method for the base station to set a predetermined threshold to force PUSCH transmission when this situation occurs. In this case, if the priority of a logical channel included in the PUSCH transmission is greater than a preset threshold, PUSCH transmission is performed. Otherwise, the SR for transmitting the SCell BFR MAC CE is prioritized and transmitted.
  • the terminal may perform the PUSCH transmission.
  • the UE may transmit an SR for transmitting the SCell BFR MAC CE.
  • uplink data transmission overlapping in time with the SR for transmitting the SCell BFR MAC CE is not performed.
  • This scheme can be used as a method for the base station to protect data transmission with very high priority.
  • the third scheme is a scheme in which PUSCH is always prioritized and transmitted.
  • the SR for transmitting the SCell BFR MAC CE is not always transmitted.
  • the UE may perform PUSCH transmission.
  • the fourth scheme is to separately set the priority of the SR for transmitting the SCell BFR MAC CE using a message of the RRC layer, and when this situation occurs, the priority (the highest of the logical channels) of the PUSCH to be transmitted and the SCell BFR MAC.
  • This is a method of performing transmission having a high priority by comparing the priority set in the SR for transmitting the CE.
  • This is similar to the second scheme, but is a method in which the priorities of the SR for transmitting the SCell BFR MAC CE can be directly signaled and the priorities can be compared with other logical channels.
  • the fifth scheme is a method of transmitting the PUSCH if the SCell BFR MAC CE is included in the present PUSCH, and if not, prioritizing the SR for transmitting the SCell BFR MAC CE.
  • the corresponding MAC CE is immediately transmitted to allow the base station to transmit the SCell BFR MAC CE as soon as possible. CE information can be transmitted.
  • the UE may determine through the above method and perform the corresponding transmission.
  • FIG. 4 is an exemplary diagram of an operation sequence of a terminal performing SR transmission for SCell BFR MAC CE.
  • the terminal is connected to the LTE base station and is in a connection mode (RRC_CONNECTED) (4-01).
  • the base station to which the terminal is connected may be an NR base station.
  • the UE receives configuration information for a radio bearer and a logical channel related thereto, and SR resources and related configuration information for each logical channel from the base station, and transmits a confirmation message thereon (4-03).
  • the configuration information transmitted by the base station may be received using an RRCReconfiguration message of the RRC layer, and a confirmation message transmitted by the terminal may be transmitted using an RRCReconfigurationComplete message of the RRC layer.
  • the configuration information message may also include configuration information on whether the terminal can report the beam failure when determining the SCell.
  • configuration information on which one to transmit by determining priority may be included. If the separate configuration information for this is not included, the UE prioritizes the PUSCH when the PUCCH transmission and the PUSCH overlap in time.
  • the terminal receiving the configuration information may determine whether a beam failure occurs for not only the PCell but also the SCell, as described above (4-05). Accordingly, if a beam failure of the SCell is detected, it may be determined whether the PUCCH SR resource is allocated as a message of the RRC layer to transmit the SCell BFR MAC CE (4-07). If a separate SR resource is not allocated, the UE performs a random access procedure and transmits the SCell BFR MAC CE to the base station by including the SCell BFR MAC CE in the Msg3 message of the random access to notify that a beam failure has occurred in a specific SCell (4 -13).
  • the base station sets the PUCCH SR resource to transmit the SCell BFR MAC CE, it can be determined whether the corresponding resource overlaps the resource for data transmission dynamically or periodically allocated by the base station (4-09). . If they do not overlap, the UE may transmit the corresponding SR and then transmit the SCell BFR MAC CE to the uplink resource received from the base station (4-15). However, if the PUCCH SR resource and the base station dynamically or periodically allocated a resource for data transmission overlap in time, the terminal may determine whether to compare priorities according to the configuration information of the RRC layer (4 -11).
  • the terminal may determine whether the corresponding configuration information is set. If not configured separately, the UE transmits the PUSCH and the SR for SCell BFR MAC CE transmission attempts to transmit to the next SR resource (4-19), and then determines whether the next PUCCH SR resource overlaps with the PUSCH resource again. Can be judged (4-09). However, if the terminal needs to perform an operation for this, the terminal can determine whether to transmit the PUCCH or the PUSCH according to one of several methods below (4-17).
  • the first scheme is a scheme for always prioritizing the SR for transmitting the SCell BFR MAC CE. Since this is a situation in which communication in the SCell is interrupted, it can be used under the judgment that it should be restored prior to other data transmission. In this case, uplink data transmission overlapping in time with the SR for transmitting the SCell BFR MAC CE is not performed.
  • the second method is a method for the base station to set a predetermined threshold to force PUSCH transmission when this situation occurs. In this case, if the priority of a logical channel included in the PUSCH transmission is greater than a preset threshold, PUSCH transmission is performed. Otherwise, the SR for transmitting the SCell BFR MAC CE is prioritized and transmitted. This scheme can be used as a method for the base station to protect data transmission with very high priority.
  • the third scheme is a scheme in which PUSCH is always prioritized and transmitted.
  • the SR for transmitting the SCell BFR MAC CE is not always transmitted. This can be used under the assumption that the priority does not need to be very high since communication is still possible in the remaining serving cells (eg, PCell), even though a beam failure occurs in the SCell.
  • the fourth scheme is to separately set the priority of the SR for transmitting the SCell BFR MAC CE using a message of the RRC layer, and when this situation occurs, the priority (the highest of the logical channels) of the PUSCH to be transmitted and the SCell BFR MAC.
  • This is a method of performing transmission having a high priority by comparing the priority set in the SR for transmitting the CE.
  • This is similar to the second scheme, but is a method in which the priorities of the SR for transmitting the SCell BFR MAC CE can be directly signaled and the priorities can be compared with other logical channels.
  • the fifth scheme is a method of transmitting the PUSCH if the SCell BFR MAC CE is included in the present PUSCH, and if not, prioritizing the SR for transmitting the SCell BFR MAC CE.
  • the corresponding MAC CE is immediately transmitted to allow the base station to transmit the SCell BFR MAC CE as soon as possible. CE information can be transmitted.
  • the UE may determine through the above method and perform the corresponding transmission.
  • the UE may transmit the SR and transmit the SCell BFR MAC CE with uplink support received thereafter (4-15).
  • the PUSCH resource is transmitted and the SR transmission is attempted to the next SR PUCCH resource, or if the corresponding PUSCH resource including the SCell BFR MAC CE is transmitted according to the above scheme, the procedure is terminated. can do.
  • the terminal notifies the base station of the beam failure of the SCell, and the base station adjusts the beam in the corresponding SCell to recover the beam failure.
  • FIG. 5 shows a block configuration of a terminal according to an embodiment of the present invention.
  • the terminal includes a radio frequency (RF) processing unit 5-10, a baseband processing unit 5-20, a storage unit 5-30, and a control unit 5-40. do.
  • RF radio frequency
  • the RF processing unit 5-10 performs a function of transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processing unit 5-10 up-converts the baseband signal provided from the baseband processing unit 5-20 into an RF band signal and transmits it through an antenna, and the RF band signal received through the antenna Downconvert to a baseband signal.
  • the RF processing unit 5-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. I can. In FIG. 5, only one antenna is shown, but the terminal may include a plurality of antennas.
  • the RF processing unit 5-10 may include a plurality of RF chains. Further, the RF processing unit 5-10 may perform beamforming. For the beamforming, the RF processing unit 5-10 may adjust a phase and a magnitude of each of signals transmitted/received through a plurality of antennas or antenna elements.
  • the baseband processing unit 5-20 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when transmitting data, the baseband processing unit 5-20 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit 5-20 restores a received bit stream through demodulation and decoding of the baseband signal provided from the RF processing unit 5-10. For example, in the case of the OFDM (orthogonal frequency division multiplexing) method, when transmitting data, the baseband processor 5-20 generates complex symbols by encoding and modulating a transmission bit stream, and subcarriers the complex symbols.
  • OFDM orthogonal frequency division multiplexing
  • OFDM symbols are constructed through an inverse fast Fourier transform (IFFT) operation and a cyclic prefix (CP) insertion.
  • IFFT inverse fast Fourier transform
  • CP cyclic prefix
  • the baseband processing unit 5-20 divides the baseband signal provided from the RF processing unit 5-10 in units of OFDM symbols, and applies a fast Fourier transform (FFT) operation to subcarriers. After restoring the mapped signals, the received bit stream is restored through demodulation and decoding.
  • FFT fast Fourier transform
  • the baseband processing unit 5-20 and the RF processing unit 5-10 transmit and receive signals as described above. Accordingly, the baseband processing unit 5-20 and the RF processing unit 5-10 may be referred to as a transmission unit, a reception unit, a transmission/reception unit, or a communication unit. In addition, at least one of the baseband processing unit 5-20 and the RF processing unit 5-10 may include different communication modules to process signals of different frequency bands.
  • the different frequency bands may include a super high frequency (SHF) (eg, 2.5GHz, 5Ghz) band, and a millimeter wave (eg, 60GHz) band.
  • SHF super high frequency
  • 5Ghz millimeter wave
  • the storage unit 5-30 stores data such as a basic program, an application program, and setting information for the operation of the terminal.
  • the controller 5-40 controls overall operations of the terminal.
  • the control unit 5-40 transmits and receives signals through the baseband processing unit 5-20 and the RF processing unit 5-10.
  • the control unit 5-40 writes and reads data in the storage unit 5-40.
  • the control unit 5-40 may include at least one processor.
  • the controller 5-40 may include a communication processor (CP) that controls communication and an application processor (AP) that controls an upper layer such as an application program.
  • the control unit 5-40 includes a multiple connection processing unit 5-42 that performs processing for operating in a multiple connection mode.
  • the controller 5-40 may control the terminal to perform a procedure shown in the operation of the terminal illustrated in FIG. 5.
  • the UE receives the configuration related to transmission of the SCell BFR MAC CE from the base station, and determines which transmission to perform when PUSCH transmission and SR transmission for transmitting the SCell BFR MAC CE overlap in time. I can.
  • FIG. 6 is a diagram showing the structure of a base station according to an embodiment of the present invention.
  • the base station may include a transmission/reception unit 610, a control unit 620, and a storage unit 630.
  • the control unit may be defined as a circuit or an application-specific integrated circuit or at least one processor.
  • the transceiver 610 may transmit and receive signals with other network entities.
  • the transceiver 610 may transmit, to the terminal, an RRC message including configuration information for a radio bearer and a logical channel related thereto, and SR resources for each logical channel and related configuration information.
  • the controller 620 may control the overall operation of the base station according to the embodiment proposed in the present invention. For example, the controller 620 may control a signal flow between blocks to perform an operation according to the above-described flowchart. Specifically, the controller 620 may control to generate and transmit the setting information to the terminal according to an embodiment of the present invention. In addition, when an SR for transmitting the SCell BFR MAC CE is received, the control unit 620 may allocate an uplink transmission resource for transmission of the SCell BFR MAC CE to the terminal.
  • the storage unit 630 may store at least one of information transmitted and received through the transmission/reception unit 610 and information generated through the control unit 520.
  • the storage unit 630 may store configuration information for a radio bearer and a logical channel related thereto, SR resources for each logical channel, and related configuration information.
  • FIG. 7 is a flowchart illustrating a method of controlling a terminal according to an embodiment of the present invention.
  • the terminal may detect a beam failure in a secondary cell (scell).
  • scell secondary cell
  • the terminal may check whether the resource for transmitting a scheduling request (SR) related to the detected beam failure overlaps in time with the resource for transmitting data.
  • SR scheduling request
  • step S720 when the resource for transmitting the SR overlaps in time with the resource for transmitting the data, the terminal may determine to transmit one of the SR and the data.
  • a computer-readable storage medium storing one or more programs (software modules) may be provided.
  • One or more programs stored in a computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device).
  • the one or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of the present invention.
  • These programs include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM.
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • magnetic disc storage device Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or other types of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all of them. In addition, a plurality of configuration memories may be included.
  • the program is through a communication network composed of a communication network such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof. It may be stored in an accessible storage device. Such a storage device can access a device performing an embodiment of the present invention through an external port. In addition, a separate storage device on the communication network may access a device performing an embodiment of the present invention.
  • a communication network such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof. It may be stored in an accessible storage device. Such a storage device can access a device performing an embodiment of the present invention through an external port.
  • a separate storage device on the communication network may access a device performing an embodiment of the present invention.
  • the constituent elements included in the invention are expressed in the singular or plural according to the presented specific embodiment.
  • the singular or plural expression is selected appropriately for the situation presented for convenience of description, and the present invention is not limited to the singular or plural constituent elements, and even constituent elements expressed in plural are composed of the singular or singular. Even the expressed constituent elements may be composed of pluralities.

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

Abstract

La présente invention concerne une technique de communication permettant de combiner une technologie d'IoT avec un système de communication 5G pour prendre en charge un débit de transmission de données supérieur à celui d'un système 4G, et un système associé. La présente invention peut être appliquée à des services intelligents (par exemple des maisons intelligentes, des bâtiments intelligents, des villes intelligentes, des voitures intelligentes ou des voitures connectées, des soins de santé, l'enseignement numérique, la vente au détail, des services de sûreté et de sécurité, et analogues) sur la base de technologies de communication 5G et de technologies liées à l'IoT. Selon la présente invention, un terminal peut demander des ressources au moyen d'une pluralité de demandes de planification conformément aux caractéristiques de trafic et à la cause de demande de ressource de transmission, et peut ainsi recevoir une attribution de ressources de liaison montante d'une manière opportune et transmettre des données.
PCT/KR2020/012952 2019-10-02 2020-09-24 Procédé et dispositif pour déterminer une priorité entre une demande de planification pour un rapport de défaillance de faisceau de cellule secondaire (scell) et d'autres transmissions en liaison montante dans un système de communication sans fil Ceased WO2021066389A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190122321A KR102911086B1 (ko) 2019-10-02 무선통신시스템에서 SCell(secondary cell) 빔실패보고를 위한 스케쥴링 요청과 다른 상향링크 전송 간에 우선순위를 결정하는 방법 및 장치
KR10-2019-0122321 2019-10-02

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WO2021066389A1 true WO2021066389A1 (fr) 2021-04-08

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130065622A1 (en) * 2011-09-14 2013-03-14 Samsung Electronics Co., Ltd. Method and apparatus for forming virtual cell in wireless communication system
WO2017024516A1 (fr) * 2015-08-11 2017-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Reprise après une défaillance de faisceau

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US20130065622A1 (en) * 2011-09-14 2013-03-14 Samsung Electronics Co., Ltd. Method and apparatus for forming virtual cell in wireless communication system
WO2017024516A1 (fr) * 2015-08-11 2017-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Reprise après une défaillance de faisceau

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Title
ERICSSON: "BFR on SCell", 3GPP DRAFT; R2-1910357 - BFR ON SCELL, vol. RAN WG2, 15 August 2019 (2019-08-15), Prague, Czech Republic, pages 1 - 7, XP051768136 *
SAMSUNG: "RAN2 Aspects of SCell BFR", 3GPP DRAFT; R2-1908821_RAN2 ASPECTS OF SCELL BFR, vol. RAN WG2, 15 August 2019 (2019-08-15), Prague, Czech Republic, pages 1 - 5, XP051766643 *
ZTE , SANECHIPS: "Consideration on Beam Failure Recovery on SCell", 3GPP DRAFT; R2-1910404- CONSIDERATION ON BEAM FAILURE RECOVERY FOR SCELL, vol. RAN WG2, 16 August 2019 (2019-08-16), Prague, Czech Republic, pages 1 - 5, XP051768183 *

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