WO2023022184A1

WO2023022184A1 - Terminal and wireless communication method

Info

Publication number: WO2023022184A1
Application number: PCT/JP2022/031147
Authority: WO
Inventors: 天楊閔
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2021-08-20
Filing date: 2022-08-18
Publication date: 2023-02-23
Also published as: CN117917171A

Abstract

This terminal comprises: a transmission unit that repeatedly transmits a message in a random access channel procedure; and a control unit that sets a resource for random access on the basis of whether or not the repeated transmission is applied and on the basis of a quality threshold for the repeated transmission.

Description

Terminal and wireless communication method

The present disclosure relates to a terminal and wireless communication method that support message repetition in random access channel procedures.

The 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with

For example, in 3GPP Release-17, a work item on coverage enhancement (CE: Coverage Enhancement) in NR was agreed (Non-Patent Document 1).

Specifically, studies are underway on the repetition specification of the physical uplink shared channel (PUSCH) used to transmit the message (Msg3) of the random access channel (RACH (Random Access Channel) procedure. there is

If Repetition of the message (Msg3) of the RACH procedure is supported, it is considered that there is room for improvement regarding the specific operation of the terminal (User Equipment, UE) regarding Repetition.

For example, when repetition is supported, the UE is required to take more appropriate actions according to the repetition when reporting the RACH procedure and when the RACH procedure fails.

Therefore, the following disclosure is made in view of this situation, and aims to provide a terminal and a wireless communication method that can perform more appropriate operations with respect to Repetition of the message (Msg3) of the RACH procedure. .

One aspect of the present disclosure is a transmitting unit (radio signal transmitting/receiving unit 210) that repeatedly transmits a message in a random access channel procedure, whether the repeated transmission is applied, and based on the quality threshold for the repeated transmission, , and a control unit (control unit 270) that configures random access resources.

One aspect of the present disclosure relates to a transmitting unit (radio signal transmitting/receiving unit 210) that repeatedly transmits a message in a random access channel procedure, and a quality threshold for the repeated transmission when the random access channel procedure fails in the repeated transmission. A terminal (UE 200) including a control unit (control unit 270) that generates a random access report containing information.

An aspect of the present disclosure is to repeatedly transmit a message in a random access channel procedure, and configure resources for random access based on whether the repeated transmission is applied and the quality threshold for the repeated transmission. and a wireless communication method.

One aspect of the present disclosure is the step of repeatedly transmitting a message in a random access channel procedure, and generating a random access report containing information about a quality threshold for the repeated transmission if the random access channel procedure fails in the repeated transmission. and a step of performing wireless communication.

FIG. 1 is an overall schematic configuration diagram of a radio communication system 10. As shown in FIG. FIG. 2 is a diagram showing a configuration example of radio frames, subframes and slots used in the radio communication system 10. As shown in FIG. FIG. 3 is a functional block configuration diagram of gNB100 and UE200. FIG. 4 is a diagram showing an example of a random access sequence including Repetition of Msg3. FIG. 5 is a diagram showing an example of a random access sequence including initial transmission and re-transmission of Msg3. FIG. 6 is a schematic diagram of a conventional four-step RACH procedure. FIG. 7 is a diagram illustrating an outline of a RACH procedure according to Operation Example 1. FIG. FIG. 8 is a diagram showing an outline of the RACH procedure according to Operation Example 1 (at the time of fallback from 2-step RACH to 4-step RACH). FIG. 9 is a diagram showing an example of the hardware configuration of gNB100 and UE200.

Hereinafter, embodiments will be described based on the drawings. The same or similar reference numerals are given to the same functions and configurations, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Radio Communication System FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment. The radio communication system 10 is a radio communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter NG-RAN 20 and terminals 200 (User Equipment 200, hereinafter UE 200).

Note that the wireless communication system 10 may be a wireless communication system according to a system called Beyond 5G, 5G Evolution, or 6G.

NG-RAN 20 includes a radio base station 100 (hereinafter gNB 100). Note that the specific configuration of the radio communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.

NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN 20 and 5GC may simply be referred to as a "network".

The gNB100 is an NR-compliant radio base station and performs NR-compliant radio communication with the UE200. The gNB100 and UE200 use Massive MIMO, which generates beams with higher directivity by controlling radio signals transmitted from multiple antenna elements, and Carrier Aggregation (CA), which bundles multiple component carriers (CC). , and dual connectivity (DC) in which communication is performed simultaneously between the UE and each of a plurality of NG-RAN Nodes.

The wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR (Frequency Range) are as follows.

・FR1: 410MHz to 7.125GHz
・FR2: 24.25GHz to 52.6GHz
In FR1, a Sub-Carrier Spacing (SCS) of 15, 30 or 60 kHz may be used and a bandwidth (BW) of 5-100 MHz may be used. FR2 is a higher frequency than FR1 and may use an SCS of 60 or 120 kHz (240 kHz may be included) and a bandwidth (BW) of 50-400 MHz.

Furthermore, the wireless communication system 10 may also support a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 may support frequency bands above 52.6 GHz and up to 114.25 GHz.

Also, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform-Spread (DFT-S-OFDM) with larger Sub-Carrier Spacing (SCS) may be applied. Furthermore, DFT-S-OFDM may be applied not only to the uplink (UL) but also to the downlink (DL).

FIG. 2 shows a configuration example of radio frames, subframes and slots used in the radio communication system 10. FIG.

As shown in FIG. 2, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the number of symbols forming one slot does not necessarily have to be 14 symbols (for example, 28 or 56 symbols). Also, the number of slots per subframe may vary depending on the SCS. Additionally, the SCS may be wider than 240kHz (eg, 480kHz, 960kHz, as shown in Figure 2).

Note that the time direction (t) shown in FIG. 2 may be called the time domain, symbol period, symbol time, or the like. The frequency direction may also be referred to as frequency domain, resource block, subcarrier, BWP (Bandwidth part), and the like.

The radio communication system 10 can support coverage enhancement (CE: Coverage Enhancement) that expands the coverage of cells (or physical channels) formed by the gNB 100. Coverage enhancement may provide mechanisms for increasing the success rate of reception of various physical channels.

For example, gNB 100 can support repeated transmission of PDSCH (Physical Downlink Shared Channel), and UE 200 can support repeated transmission of PUSCH (Physical Uplink Shared Channel).

Also, in the radio communication system 10, multiple types of UE 200 may be used. For example, the UE 200 may include multiple types of terminals that differ in function or performance, or that support different 3GPP releases. The terminal (UE) may be called a type 1 terminal and a type 2 terminal. Also, type may be replaced by other terms such as generation, release, and the like. A Type 1 terminal and a Type 2 terminal may be called an enhanced UE and a legacy UE, respectively. An enhanced UE supports the latest release of 3GPP and a legacy UE may be interpreted as a UE that does not support the latest release.

In the wireless communication system 10, a time division duplex (TDD) slot configuration pattern may be set. For example, DDDSU (D: downlink (DL symbol, S: DL/uplink (UL) or guard symbol, U: UL symbol) may be specified (see 3GPP TS38.101-4).

"D" indicates a slot containing all DL symbols, and "S" indicates a slot containing a mixture of DL, UL, and guard symbols (G). "U" indicates a slot containing all UL symbols.

(2) Functional Block Configuration of Radio Communication System Next, the functional block configuration of the radio communication system 10 will be described. Specifically, the functional block configuration of UE 200 will be described. FIG. 3 is a functional block configuration diagram of gNB100 and UE200.

As shown in FIG. 3, the UE 200 includes a radio signal transmission/reception unit 210, an amplifier unit 220, a modem unit 230, a control signal/reference signal processing unit 240, an encoding/decoding unit 250, a data transmission/reception unit 260, and a control unit 270. .

Note that FIG. 3 shows only main functional blocks related to the description of the embodiment, and that the UE 200 (gNB 100) has other functional blocks (for example, power supply section, etc.). Also, FIG. 3 shows the functional block configuration of the UE 200, and please refer to FIG. 9 for the hardware configuration.

The radio signal transmitting/receiving unit 210 transmits/receives radio signals according to NR. The radio signal transmitting/receiving unit 210 controls radio (RF) signals transmitted from multiple antenna elements to generate beams with higher directivity. It can support aggregation (CA), dual connectivity (DC) in which communication is performed simultaneously between the UE and two NG-RAN Nodes, and the like.

Also, the radio signal transmitting/receiving unit 210 may transmit a physical uplink shared channel. Specifically, radio signal transmitting/receiving section 210 may transmit PUSCH toward the network (gNB 100).

The radio signal transmitting/receiving unit 210 may support repeated transmission (repetition) of PUSCH.

Multiple types of repeated transmission of PUSCH may be defined. Specifically, Repetition type A and Repetition type B may be defined. Repetition type A may be interpreted as a form in which the PUSCH allocated within the slot is repeatedly transmitted. That is, PUSCH is 14 symbols or less, and there is no possibility of being allocated across multiple slots (adjacent slots).

On the other hand, Repetition type B may be interpreted as repeated transmission of PUSCH to which 15 or more PUSCH symbols may be allocated. In the present embodiment, allocation of such PUSCH across multiple slots may be allowed.

Also, the radio signal transmitting/receiving unit 210 may transmit a random access preamble as a first message (hereinafter Msg1) in a random access channel procedure (hereinafter RACH (Random Access Channel) procedure).

The radio signal transmitting/receiving unit 210 may receive a second message (hereinafter Msg2) as a response message (random access response (RAR)) to Msg1 in the RACH procedure.

After receiving Msg2, the radio signal transmitting/receiving unit 210 may transmit a third message (hereinafter referred to as Msg3) via PUSCH in the RACH procedure.

The radio signal transmitting/receiving unit 210 may receive a fourth message (hereinafter Msg4) as a response message to Msg3 in the RACH procedure (3GPP TS38.321 V16.2.1 §5.1 "Random Access procedure").

For example, Msg1 may be transmitted via PRACH (Physical Random Access Channel). Msg1 may be called PRACH Preamble. Msg2 may be transmitted via PDSCH. Msg2 may be called RAR (Random Access Response). Msg3 may be called RRC Connection Request. Msg4 may be called RRC Connection Setup.

Msg3 may also be called PUSCH scheduled by RAR UL grant or PUSCH scheduled by DCI scrambled by Temporary Cell - Radio Network Temporary Identifier (TC-RNTI).

The radio signal transmitting/receiving unit 210 repeatedly transmits Msg3. In this embodiment, the radio signal transmitting/receiving unit 210 may constitute a transmitting unit that repeatedly transmits messages in the random access channel procedure. Details of repeated transmission of Msg3 will be described later.

The amplifier section 220 is configured by a PA (Power Amplifier)/LNA (Low Noise Amplifier) and the like. Amplifier section 220 amplifies the signal output from modem section 230 to a predetermined power level. In addition, amplifier section 220 amplifies the RF signal output from radio signal transmission/reception section 210 .

The modulation/demodulation unit 230 executes data modulation/demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100, etc.). The modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform-Spread (DFT-S-OFDM). Also, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).

The control signal/reference signal processing unit 240 executes processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200.

Specifically, the control signal/reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, radio resource control layer (RRC) control signals. Also, the control signal/reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.

The control signal/reference signal processing unit 240 executes processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

A DMRS (demodulation reference signal) is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.

In addition to DMRS and PTRS, reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for position information.

Also, the channel includes a control channel and a data channel. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI)), and Physical Broadcast Channel (PBCH) etc. may be included.

In addition, data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). Data may refer to data transmitted over a data channel.

Also, the control signal/reference signal processing unit 240 may transmit the capability information of the UE 200 regarding allocation of the physical uplink shared channel (PUSCH) to the network.

Specifically, the control signal/reference signal processing unit 240 can transmit UE Capability Information regarding PUSCH allocation (which may include repetition) to the gNB 100.

In addition, the control signal/reference signal processing unit 240 may transmit DMRS so that joint channel estimation (described later) can be performed between specific PUSCHs, between PUCCHs, or between PUSCHs and PUCCHs. This period of time may be called the Time domain window.

The control signal/reference signal processing unit 240 may transmit a random access report (RA-report) to the network. The RA-report may include the results of the RACH procedure and the like, and may include a quality threshold (RSRP (Reference Signal Received Power) threshold, etc.) applied to the RACH procedure.

The encoding/decoding unit 250 performs data segmentation/concatenation, channel coding/decoding, etc. for each predetermined communication destination (gNB 100 or other gNB).

Specifically, the encoding/decoding unit 250 divides the data output from the data transmission/reception unit 260 into pieces of a predetermined size, and performs channel coding on the divided data. Also, encoding/decoding section 250 decodes the data output from modem section 230 and concatenates the decoded data.

The data transmission/reception unit 260 executes transmission/reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitting/receiving unit 260 performs PDU/SDU in multiple layers (medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), etc.). Assemble/disassemble etc. The data transmission/reception unit 260 also performs data error correction and retransmission control based on hybrid ARQ (Hybrid automatic repeat request).

The control unit 270 controls each functional block that configures the UE200. In particular, in the present embodiment, the control unit 270 executes control related to repetition of PUSCH for Msg3 (hereinafter abbreviated as Msg3 PUSCH as appropriate).

Specifically, the control unit 270 may configure random access resources based on whether or not repeated transmission of messages in the RACH procedure is applied, and a quality threshold for repeated transmission. For example, when a repetition of Msg3 (a message of other RACH procedures such as Msg. A, the same applies below) is provided, the control unit 270 calls the quality threshold for Msg3 (rsrp-ThresholdSSB for MSG3 PUSCH repetition). may be used), the RACH resource to be used may be set.

The quality threshold (rsrp-ThresholdSSB for MSG3 PUSCH repetition) is the quality threshold for synchronization signal block (SS (Synchronization Signal)/PBCH (Physical Broadcast CHannel) Block) (rsrp-ThresholdSSB ) may be set lower (worse) than

Also, the control unit 270 may set the random access resource based on whether the random access channel procedure is 2-step or 4-step. Specifically, when the control unit 270 falls back from a 2-step RACH procedure (2-step RACH) to a 4-step RACH procedure (4-step RACH), depending on whether Repetition of Msg3 is applied, The contents of the RA procedure may be changed to set random access resources.

The control unit 270 may generate a random access report (RA-report) including information on the quality threshold for Msg3 (rsrp-ThresholdSSB for MSG3 PUSCH repetition) when the RACH procedure fails in the repetition of Msg3. Specifically, the control unit 270 may include the rsrp-Threshold SSB for MSG3 PUSCH repetition in the RA-report and cause the control signal/reference signal processing unit 240 to transmit the RA-report.

(3) Operation of Radio Communication System Next, the operation of the radio communication system 10 will be described. Specifically, the operation related to Repetition of the RACH procedure message (Msg3) will be described.

(3.1) Premise FIG. 4 shows an example of a random access sequence including Repetition of Msg3. As shown in FIG. 4, UE 200 first transmits Msg1 to NG-RAN 20 (gNB 100) according to the RACH procedure. Msg1 may be called a random access preamble, as described above.

　UE200 receives Msg2 corresponding to Msg1 from NG-RAN20. UE200 transmits Msg3 corresponding to Msg2 to NG-RAN20. As shown in FIG. 4, Msg3 may be sent repeatedly. Although not shown, Msg1 and the like may be repeatedly transmitted.

　UE200 may receive Msg4 for any one of Msg3 from NG-RAN20. UE200 may transmit an acknowledgment (HARQ (Hybrid Automatic repeat request)-ACK) for Msg4 to NG-RAN20.

FIG. 5 shows an example of a random access sequence including initial transmission and re-transmission of Msg3.

As shown in Figure 5, the 3GPP specifications specify re-transmission of Msg3. Re-transmission of Msg3 may be performed if initial transmission of Msg3 fails (cannot be received on the network side).

For re-transmission of Msg3, resources may be allocated by DCI format 0_0 with CRC scrambled by TC-RNTI.

The PUSCH Repetition used for Msg3 transmission (which may include re-transmission) may be related to Type A PUSCH Repetition.

Type A and Type B exist as existing PUSCH mapping types. Type A is used only for repetition Type A, and Type B may be used for both repetition Type A and repetition Type B. Since the existing Type A and Type B assume slot-based allocation, the value of L does not have to exceed "14" (the number of symbols) (3GPP TS38.214 V16.2.0, §6.1. 2).

Fig. 6 outlines the conventional four-step RACH procedure. Specifically, FIG. 6 shows a RACH resource selection procedure according to a four-step contention-based random access procedure (CBRA).

As shown in FIG. 6, the UE 200 determines the quality of the DL beam BM based on rsrp-ThresholdSSB (quality threshold), and the selection method of the beam BM can be different (the square frame indicating the quality level of the DL beam quality The line type corresponds to the line type of the flow box (same below).

(3.2) Operation example 1
Although FIG. 6 outlines the conventional 4-step RACH procedure, the RACH procedure may be changed when Repetition of Msg3 PUSCH is introduced. In this operation example, the RACH procedure when Msg3 PUSCH Repetition is introduced will be described.

FIG. 7 shows an outline of the RACH procedure according to Operation Example 1. Specifically, FIG. 7 shows a RACH resource selection procedure (4-step contention based RACH) incorporating MSG3 PUSCH repetition.

As shown in FIG. 7, UE 200 uses not only rsrp-ThresholdSSB, but also rsrp-ThresholdSSB for MSG3 PUSCH repetition for Msg3 PUSCH repetition to determine the quality of SSB (which may be read as a beam, etc.), A resource for random access, ie a RACH procedure, may be determined.

FIG. 8 shows an outline of the RACH procedure according to Operation Example 1 (at the time of fallback from 2-step RACH to 4-step RACH). Specifically, FIG. 8 shows a RACH resource selection procedure incorporating MSG3 PUSCH repetition (at the time of fallback from 2-step RACH to 4-step RACH).

As shown in FIG. 8, UE 200 may determine the quality of SSB using msgA-RSRP-Threshold and rsrp-Threshold SSB for MSG3 PUSCH repetition to determine random access resources, that is, RACH procedures.

Specifically, UE200 may select 2-step RACH or 4-step RACH based on msgA-RSRP-Threshold and rsrp-ThresholdSSB for MSG3 PUSCH repetition, and in case of 4-step RACH, Msg3 PUSCH A RACH procedure for repetition or a normal RACH (4-step common RACH) procedure to which the repetition is not applied may be selected.

(3.3) Operation example 2
In this operation example, an example of RA-report contents when Repetition of Msg3 PUSCH is introduced in the RACH procedure will be described. In particular, an example of the content of the RA-report when RACH fails is described.

　UE 200 may report an RA-report containing the following contents to the network.

・An indication showing whether DL beam (SSB) quality associated to the random access attempt is below the new rsrp-Threshold SSB for MSG3 PUSCH repetition or not.
・An indication showing whether DL beam (SSB) quality associated to the random access attempt is below the new rsrp-Threshold SSB for MSG3 PUSCH repetition or not while UE fallback from 2-step RACH to 4-step RACH.
・An indication showing when MSG3 PUSCH repetition is triggered, if there is any other beams whose quality (RSRP) is lower than rsrp-ThresholdSSB but higher than rsrp-ThresholdSSB for MSG3 PUSCH repetition.
・An indication showing whether MSG3 PUSCH repetition is triggered or not.
・An indication showing if MSG3 PUSCH repetition is triggered or not while UE fallback from 2-step RACH to 4-step RACH.
・DL beam quality (RSRP) when MSG3 PUSCH repetition is triggered
・Number of MSG3 PUSCH Repetition when MSG3 PUSCH repetition is triggered ・An indication showing whether UE received the msg4 or not after the MSG3 PUSCH Repetition.
・An indication showing RACH MSG3 PUSCH repetition is triggered while RACH prioritization is configured.
・An indication showing RACH MSG3 PUSCH repetition is triggered while slice based RACH prioritization is configured
・An indication showing MSG3 PUSCH repetition is triggered for RedCap UE (1RX or 2RX branch).
RedCap UE may be interpreted as a category of UE used, for example, for industrial wireless sensors, video surveillance and wearables. Alternatively, the RedCap UE does not necessarily have reduced capabilities, and may be interpreted as a UE for URLLC (Ultra-Reliable and Low Latency Communications) or IoT (Internet of Things). A RedCap UE may be referred to as a specific type of UE.

(4) Functions and Effects According to the above-described embodiment, the following functions and effects are obtained. Specifically, according to UE 200, the repetition function of Msg3 PUSCH can be incorporated into an existing RACH procedure, and a RACH procedure having the MSG3 PUSCH repetition function can be realized.

　In addition, according to UE200, when RACH incorporating the MSG3 PUSCH repetition function fails, RA-report including information on Msg3PUSCH repetition, such as rsrp-ThresholdSSB for MSG3 PUSCH repetition, can be reported to the network. Thus, the network may optimize tuning of parameters related to RACH.

(5) Other Embodiments Although the contents of the present invention have been described along with the examples, it should be understood that the present invention is not limited to these descriptions and that various modifications and improvements are possible. self-evident to the trader.

For example, in the above-described embodiment, an embodiment regarding repetition of Msg3 and PUSCH has been described, but the above-described operation regarding repetition may be applied to messages in the RACH procedure or other uplink channels.

Also, PUSCH may be called a physical uplink shared channel, and if it is a channel (physical channel) shared by multiple UEs 200 (users) in UL, it does not necessarily have to be PUSCH. Furthermore, as described above, not only Msg3, but also other RACH-related messages, such as Msg. A for 2-step RACH (which may be interpreted as a contention-free random access procedure (CFRA)), Alternatively, it may be applied to Msg.1 etc. if possible. May be interpreted as Msg 1 - PRACH Preamble, Msg 2 - RAR (PDCCH/PDSCH), Msg 3 (PUSCH), Msg 4 - Contention Resolution (PDCCH/PDSCH) respectively.

Also, in the above description, configure, activate, update, indicate, enable, specify, and select may be read interchangeably. good. Similarly, link, associate, correspond, and map may be read interchangeably to allocate, assign, monitor. , map, may also be read interchangeably.

Furthermore, specific, dedicated, UE-specific, and UE-specific may be read interchangeably. Similarly, common, shared, group-common, UE common, and UE shared may be read interchangeably.

In the present disclosure, "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel" are interchangeable. can be used as intended.

Also, the block configuration diagram (FIG. 3) used to describe the above-described embodiment shows blocks for each function. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

Furthermore, the gNB 100 and UE 200 (applicable device) described above may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 9 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 9, the device may be configured as a computing device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.

Each functional block of the device (see FIG. 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .

A processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.

Also, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. Further, the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store programs (program code), software modules, etc. capable of executing a method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like. Storage 1003 may also be referred to as an auxiliary storage device. The recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD). may consist of

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside. The output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

In addition, the device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc. A part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

In addition, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may include physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof, and RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)) , IEEE 802.16 (WiMAX®), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth®, other suitable systems, and/or next-generation systems enhanced therefrom. may be applied to Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

A specific operation that is performed by a base station in the present disclosure may be performed by its upper node in some cases. In a network consisting of one or more network nodes with a base station, various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc., but not limited to). Although the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals (information, etc.) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.

The determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of

The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indexed.

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various designations assigned to these various channels and information elements are in no way restrictive designations. isn't it.

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " Terms such as "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.

The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.

In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal" may be used interchangeably. .

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.

Also, the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same). For example, communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the mobile station may have the functions that the base station has. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, a mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions that the mobile station has.

A radio frame may consist of one or more frames in the time domain.

Each of one or more frames in the time domain may be called a subframe. A subframe may also consist of one or more slots in the time domain.

A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.

A slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a unit of time based on numerology.

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

If one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.

In addition, long TTI (for example, normal TTI, subframe, etc.) may be read as TTI having a time length exceeding 1 ms, and short TTI (for example, shortened TTI, etc.) is less than the TTI length of long TTI and 1 ms. A TTI having a TTI length greater than or equal to this value may be read as a replacement.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.

　The number of subcarriers included in the RB may be the same regardless of the neumerology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on neumerology.

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.

In addition, a resource block may be composed of one or more resource elements (Resource Element: RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A Bandwidth Part (BWP) (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be configured in one carrier for a UE.

At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.

The terms "connected," "coupled," or any variation thereof mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being "connected" or "coupled." Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in this disclosure, two elements are defined using at least one of one or more wires, cables and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions, and the like.

The reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.

The term "based on" as used in this disclosure does not mean "based only on" unless otherwise specified. In other words, the phrase "based on" means both "based only on" and "based at least on."

"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.

Any reference to elements using the "first," "second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.

Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

In this disclosure, if articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

The terms "determining" and "determining" used in this disclosure may encompass a wide variety of actions. "Judgement" and "determination" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "determination" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment" or "decision" has been made. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean that "A and B are different from C".
Terms such as "separate,""coupled," etc. may also be interpreted in the same manner as "different."

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

10 Radio communication system 20 NG-RAN
100 gNB
200UE
210 radio signal transmission/reception unit 220 amplifier unit 230 modulation/demodulation unit 240 control signal/reference signal processing unit 250 encoding/decoding unit 260 data transmission/reception unit 270 control unit 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device 1007 bus

Claims

a transmitter for repeatedly transmitting messages in a random access channel procedure;
a control unit configured to configure random access resources based on whether or not the repeated transmission is applied and the quality threshold for repeated transmission.
The terminal according to claim 1, wherein the control unit configures the random access resource based on whether the random access channel procedure is 2 steps or 4 steps.
a transmitter for repeatedly transmitting messages in a random access channel procedure;
a control unit for generating a random access report containing information about a quality threshold for said repeated transmission if said random access channel procedure fails in said repeated transmission.
repeatedly transmitting messages in a random access channel procedure;
and configuring random access resources based on whether or not the repeated transmission is applied and the quality threshold for the repeated transmission.
repeatedly transmitting messages in a random access channel procedure;
generating a random access report containing information about a quality threshold for said repeated transmissions if said random access channel procedure fails in said repeated transmissions.