terminal

Abstract

The terminal receives a measurement configuration including an indication indicating a priority, and controls a measurement order of a plurality of candidate cells based on the priority. The terminal transmits a measurement report including a measurement result measured in the measurement order to the network.

Description

Technical Field

[0001] This invention relates to a terminal for performing cell migration between different Radio Access Technologies (RATs). Background Technology

[0002] The 3rd Generation Partnership Project (3GPP: registered trademark) standardized the fifth-generation mobile communication system (also known as 5G, New Radio (NR), or Next Generation (NG)) and also standardized the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] In 5G, the terminal (User Equipment, UE) measures the cell quality of candidate cells for migration destination (handover destination), and performs a handover to the candidate cell when events (conditions) such as usage thresholds are met (Non-Patent Document 1).

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 38.331 V17.5.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) protocol specification (Release 17), 3GPP, June 2023 Summary of the Invention

[0007] However, during the migration from 5G to 6G, there is a high possibility that operators will have a need to prioritize the migration (handover) of UEs to cells that utilize specific radio access technologies (RATs).

[0008] Furthermore, in the initial phase of the migration from 5G to 6G, there is a higher probability that cells will follow the 4th generation mobile communication system (4G) / Long Term Evolution (LTE), and there may be situations where people want to prioritize migrating to cells that follow a specific RAT.

[0009] However, the current 3GPP specifications cannot meet such detailed requirements. Therefore, the following disclosure is made in view of this situation and aims to provide a terminal that enables migration to a desired cell in the presence of multiple cell types.

[0010] One aspect of this disclosure is a terminal comprising: a receiving unit (control signal) Reference signal processing unit 240, which receives measurement settings including an indication of priority; control unit 270, which controls the measurement order of multiple candidate cells based on the priority; and transmission unit (control signal processing unit 240). (Refer to signal processing unit 240), which sends a measurement report containing the measurement results measured in the order of measurement to the network.

[0011] One aspect of this disclosure is a terminal comprising: a receiving unit (control signal) Reference signal processing unit 240, which receives system information including an indication of priority; control unit 270, which controls the measurement order of multiple candidate cells based on the priority; and transmission unit (control signal processing unit 240). (Refer to signal processing unit 240), which sends a measurement report containing the measurement results measured in the order of measurement to the network. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the wireless communication system 10.

[0013] Figure 2 This is a diagram illustrating an example of the structure of wireless frames, subframes, and time slots used in the wireless communication system 10.

[0014] Figure 3 This is a functional block structure diagram of gNB100 and UE200.

[0015] Figure 4 This is a diagram illustrating a cell structure example where 4G, 5G, and 6G cells coexist.

[0016] Figure 5 This is a diagram illustrating a basic time series example related to measurement reporting.

[0017] Figure 6 This is a diagram showing an example of the structure of measConfig.

[0018] Figure 7 This is a diagram showing examples of the structure of 5G and 6G cells.

[0019] Figure 8This is a diagram illustrating an example of the hardware structure of gNB100 and UE200.

[0020] Figure 9 This is a diagram showing a structural example of vehicle 2001. Detailed Implementation

[0021] The embodiments are described below based on the accompanying drawings. Furthermore, the same or similar reference numerals are used to denote the same function or structure, and their descriptions are omitted where appropriate.

[0022] (1) Overall general structure of wireless communication system

[0023] Figure 1 This is a schematic diagram of the overall structure of the wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system following technologies such as 4G / LTE, 5G New Radio (NR), Beyond 5G, 5G Evolution, or 6G (hereinafter referred to as 6G), and includes a radio access network 20 (hereinafter referred to as RAN20) and a terminal 200 (UserEquipment 200, hereinafter referred to as UE200). Furthermore, the wireless communication system 10 can also use 4G, 5G, and 6G radio access technologies (RATs) concurrently.

[0024] RAN20 includes a wireless base station 100 (hereinafter referred to as gNB100). Furthermore, the specific structure of the wireless communication system 10, which includes gNBs (or eNBs, etc.) and a number of UEs, is not limited to... Figure 1 The example shown.

[0025] Furthermore, the gNB100 can also employ the fronthaul (FH) interface defined by the O-RAN (Open Radio Access Network Alliance). The gNB100 can contain O-DU (O-RAN Distributed Unit) and O-RU (O-RAN Radio Unit). The gNB100 can function as an NG-RAN node.

[0026] RAN20 actually includes multiple NG-RAN nodes, specifically gNBs (or ng-eNBs), connected to a 5G-compliant core network (not shown). RAN20 and the core network can also be simply referred to as "network".

[0027] The gNB100 is a 4G, 5G, or 6G compliant wireless base station that performs 4G, 5G, or 6G compliant wireless communication with the UE200. Furthermore, the gNB100 can be configured to include a CU (Central Unit) and a DU (Distributed Unit), with the DU located separately from the CU in geographically different locations. The CU can connect to one or more DUs. Additionally, gNB100s (gNB-CU) can connect to each other via the Xn interface, and CUs and DUs can connect via the F1 interface (F1-AP, etc.).

[0028] The gNB100 and UE200 can support Massive MIMO, which generates more directional beams by controlling radio signals transmitted from multiple antenna elements; Carrier aggregation (CA), which uses multiple component carriers (CC); and Dual connectivity (DC), which allows the UE to communicate simultaneously with each node of two or more RAN nodes. For example, any gNB can constitute the master node (MN), and one or more other gNBs can constitute the slave nodes (SN).

[0029] In addition, the wireless communication system 10 can support multiple frequency ranges (FRs) as shown below.

[0030] FR1: 410 MHz~7.125 GHz

[0031] ·FR2-1: 24.25 GHz~52.6 GHz

[0032] In FR1, a sub-carrier spacing (SCS) of 15, 30, or 60 kHz can be used, with a bandwidth (BW) of 5–100 MHz. FR2-1 is a higher frequency than FR1, and can use a sub-carrier spacing (SCS) of 60 or 120 kHz (or including 240 kHz), with a bandwidth (BW) of 50–400 MHz.

[0033] Furthermore, SCS can be interpreted as a numerology. The numerology is defined in 3GPP TS 38.300 and corresponds to a subcarrier spacing in the frequency domain.

[0034] Furthermore, the wireless communication system 10 also supports frequency bands higher than FR2-1. Specifically, the wireless communication system 10 supports frequency bands exceeding 52.6 GHz and up to 71 GHz. Such high-frequency bands can also be referred to as FR2-2.

[0035] When using a band domain exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) with larger sub-carrier spacing (SCS) can be applied.

[0036] Furthermore, in high-frequency bands like FR2-2, as mentioned above, the increase in inter-carrier phase noise becomes a problem. Therefore, a larger (wider) SCS or single-carrier waveform is required.

[0037] The larger the SCS, the shorter the symbol / CP (Cyclic Prefix) period and the slot period (while maintaining a 14 symbol / slot structure). Figure 2 An example of the structure of wireless frames, subframes, and time slots used in wireless communication system 10 is shown.

[0038] While maintaining a 14-symbol / slot structure, a larger (wider) SCS results in a shorter symbol period (and slot period). Furthermore, the symbol period can also be referred to as symbol length, time direction, or time domain, etc. Additionally, the frequency direction can be referred to as frequency domain, resource block, subcarrier, BWP (Bandwidth part), etc.

[0039] Frequency resources can include component carriers (CC), subcarriers, resource blocks (RB), resource block groups (RBG), and BWP (Bandwidth part). Time resources can include symbols, time slots, mini-time slots, subframes, radio frames, and DRX (Discontinuous Reception) periods.

[0040] Furthermore, the number of symbols constituting one time slot does not necessarily have to be 14 symbols (e.g., 28, 56 symbols). In addition, the number of time slots in each subframe can vary depending on the SCS.

[0041] Furthermore, the wireless communication system 10 can support conditional handover (CHO). In CHO, candidate cells for handover and execution conditions for handover (also known as migration) to candidate cells are pre-defined for the UE200.

[0042] Therefore, the UE200 can perform a handover to the target radio base station (also known as the target cell) without waiting for a handover instruction from the network.

[0043] A CHO can be interpreted as a handover performed by the UE200 when one or more execution conditions are met. The UE200 can begin evaluating the execution conditions upon receiving a CHO setting and stop evaluating the execution conditions during handover (traditional handover or conditional handover).

[0044] Candidate gNBs or potential target gNBs can provide CHO settings to UE200. Source gNBs can provide UE200 with execution conditions such as timing to trigger the CHO. Execution conditions can consist of one or more triggering conditions.

[0045] In addition, to evaluate the CHO execution conditions of candidate cells, two or more different triggers can be set at the same time, such as RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), SINR (Signal-to-Interference plus Noise power Ratio), etc.

[0046] Furthermore, if a Conventional Handover Notice (CHO) is set for UE200, and UE200 receives another handover (HO) command from the gNB before the CHO execution conditions are met, UE200 can trigger a handover based on the received HO command without waiting for the CHO conditions to be met. In other words, a conventional HO setting can take precedence over a CHO setting (if the CHO is set).

[0047] In addition, in the wireless communication system 10, in addition to the mobility management of the UE200 based on layer 3 (e.g., which may include the radio resource control layer (RRC)) (also referred to as L3 mobility), mobility management in layer 1 / layer 2 (e.g., which may include the media access control layer (MAC)) (also referred to as LTM or L1 / L2 mobility) can also be applied.

[0048] L3 Mobility can be interpreted as mobility control in the Radio Resource Control (RRC) layer. On the other hand, LTM can also be interpreted as mobility control in the Physical Layer (PHY), Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP) layer.

[0049] In addition, in UE-based LTM, similar to Conditional Handover (CHO), the UE can monitor the state according to the execution condition after receiving a specific execution condition from the gNB, and execute LTM when the execution condition is met.

[0050] In a broad sense, the mobility of UE200 can refer to the ease of movement and maneuverability of UE200. However, in this embodiment, it can also refer to the minimization of call drop, radio link (including beam) failure, unnecessary handover, ping-pong state, etc.

[0051] UE200 sends a measurement report (hereinafter referred to as Measurement report) to the network containing cell-related reception quality information, including the serving cell and neighboring cells. The process of UE200 sending the Measurement report can also be referred to as Measurement reporting. Cell-related reception quality information may include reception quality from the cell's beam or cell-based reception quality based on the cell's beam.

[0052] UE200 can also perform measurement reporting periodically. UE200 can also perform measurement reporting on an event-by-event basis. The entry conditions for starting measurement reporting and the exit conditions for ending measurement reporting can be specified on an event-by-event basis. Existing events can include the events shown below (refer to 3GPP TS38.331).

[0053] (i) Event A1

[0054] Event A1 is an event where the reception quality of the serving cell is better than a threshold. For example, the entry condition is Ms-Hys>Thresh, and the exit condition is Ms+Hys<Thresh.

[0055] Here, Ms is the reception quality of the serving cell, Hys is the hysteresis parameter, and Thresh is the threshold.

[0056] (ii) Event A2

[0057] Event A2 is an event where the received quality of the serving cell is worse than the threshold. For example, the entry condition is Ms + Hys < Thresh, and the exit condition is Ms - Hys > Thresh.

[0058] Here, Ms is the received quality of the serving cell, Hys is the hysteresis parameter, and Thresh is the threshold.

[0059] (iii)Event A3 (Event A3)

[0060] Event A3 is an event where the received quality of a neighboring cell is better than the received quality of the serving cell by an offset. For example, the entry condition is Mn + Ofn + Ocn - Hys > Mp + Ofp + Ocp + Off, and the exit condition is Mn + Ofn + Ocn + Hys < Mp + Ofp + Ocp + Off.

[0061] Here, Mn is the received quality of the neighboring cell, Ofn is the offset inherent to the measurement object, Ocn is the offset inherent to the cell. Mp is the received quality of the serving cell, Ofp is the offset inherent to the measurement object, Ocp is the offset inherent to the cell. Hys is the hysteresis parameter, and Off is the parameter used in Event A3.

[0062] (iv)Event A4 (Event A4)

[0063] Event A4 is an event where the received quality of a neighboring cell is better than the threshold. For example, the entry condition is Mn + Ofn + Ocn - Hys > Thresh, and the exit condition is Mn + Ofn + Ocn + Hys < Thresh.

[0064] Here, Mn is the received quality of the neighboring cell, Ofn is the offset inherent to the measurement object, Ocn is the offset inherent to the cell. Hys is the hysteresis parameter, and Thresh is the threshold.

[0065] (v)Event A5 (Event A5)

[0066] Event A5 is an event where the received quality of the serving cell is worse than the threshold and the received quality of the neighboring cell is better than the threshold. For example, the entry condition is Mp + Hys < Thresh1 and Mn + Ofn + Ocn - Hys > Thresh2, and the exit condition is Mp - Hys > Thresh1 and Mn + Ofn + Ocn + Hys < Thresh2.

[0067] Here, Ms represents the reception quality of the serving cell, Hys is the hysteresis parameter, and Thresh1 is the threshold. Mn represents the reception quality of neighboring cells, Ofn is the inherent offset of the measurement object, and Ocn is the inherent offset of the cell. Hys is the hysteresis parameter, and Thresh2 is the threshold.

[0068] (vi) Event A6

[0069] Event A6 is an event where the reception quality of a neighboring cell is better than the reception quality of the SCell (Secondary Cell) by an offset. For example, the entry condition is Mn+Ocn-Hys > Ms+Ocs+Off, and the exit condition is Mn+Ocn+Hys. <Ms+Ocs+Off。

[0070] In addition to the events mentioned above, events related to RAT (Radio Access technology) may also be included (e.g., B1 (Inter RAT neighbour becomes better than threshold: Inter RAT neighbor cells become better than threshold), B2 (Serving becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2: Serving cell becomes worse than threshold1 and inter RAT neighbor cells become better than threshold2)).

[0071] Here, Mn is the reception quality of neighboring cells, and Ocn is the cell-inherent offset. Ms is the reception quality of the SCell, and Ocs is the cell-inherent offset. Hys is the hysteresis parameter, and Off is the parameter used in Event A6.

[0072] Furthermore, in the wireless communication system 10, as described above, 4G, 5G, and 6G RATs can be used concurrently. Additionally, in the migration from 5G to 6G, Multi-RAT spectrum sharing (MRSS) can be applied in the wireless communication system 10. MRSS, also known as Dynamic Spectrum Sharing (DSS), enables 5G and 6G cells to coexist within the same frequency band. Furthermore, a 5G cell is a cell formed by a gNB (gNodeB) according to the 5G RAT, and a 6G cell can be interpreted as a cell formed by a gNB according to the 6G RAT. Similarly, a 4G cell can be interpreted as a cell formed by a gNB according to the 4G RAT.

[0073] According to MRSS, 5G and 6G cells can share spectrum resources, thus having advantages such as the ability to transmit and receive using common radio units (RUs).

[0074] (2) Functional block structure of wireless communication system

[0075] Next, the functional block structure of the wireless communication system 10 will be described. Specifically, the functional block structure of the UE200 will be described. Figure 3 This is the function block structure diagram of gNB100 and UE200.

[0076] like Figure 3 As shown, the UE200 includes a wireless signal transceiver unit 210, an amplifier unit 220, a modem unit 230, and a control signal transceiver unit 20. Reference signal processing unit 240, encoding / decoding unit 250, data transceiver unit 260 and control unit 270.

[0077] In addition, Figure 3 Only the main functional blocks associated with the implementation description are shown. It should be noted that the UE200 (gNB100) also has other functional blocks (e.g., power supply section, etc.). Additionally, Figure 3 This shows the functional module structure of UE200. For information on the hardware structure, please refer to [link / reference needed]. Figure 9 .

[0078] The wireless transceiver unit 210 transmits and receives wireless signals following 4G, 5G, or 6G standards. The wireless transceiver unit 210 can support Massive MIMO, which generates more directional beams by controlling wireless (RF) signals transmitted from multiple antenna elements; Carrier aggregation (CA), which uses multiple component carriers (CC); and Dual connectivity (DC), which enables simultaneous communication between the UE and each node of two NG-RAN nodes.

[0079] The amplification unit 220 is composed of a power amplifier (PA) and a low-noise amplifier (LNA). The amplification unit 220 amplifies the signal output from the modem 230 to a predetermined power level. Additionally, the amplification unit 220 amplifies the RF signal output from the wireless transceiver unit 210.

[0080] The modem 230 performs data modulation / demodulation, transmit power setting, and resource block allocation for each predetermined communication target (gNB100, etc.). Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) / discrete Fourier transform spread (DFT-S-OFDM) can also be applied in the modem 230. Furthermore, DFT-S-OFDM can be used not only for the uplink (UL) but also for the downlink (DL).

[0081] The control signal and reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE200, as well as processing related to various reference signals transmitted and received by the UE200.

[0082] Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, such as control signals from the Radio Resource Control (RRC) layer. Additionally, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via the predetermined control channel.

[0083] control signals The reference signal processing unit 240 performs processing using reference signals (RS) such as the demodulation reference signal (DMRS) and the tracking reference signal (TRS).

[0084] DMRS is a terminal-specific, known reference signal (pilot signal) used to estimate fading channels used in data demodulation between the base station and the terminal. TRS is a reference signal used to track time and frequency variations in the downlink.

[0085] In addition to DMRS and TRS, the reference signal may also include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for location information.

[0086] In addition, channels include control channels and data channels. Control channels may include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel), downlink control information (DCI) containing the Random Access Radio Network Temporary Identifier (RA-RNTI), and physical broadcast channel (PBCH), etc.

[0087] In addition, data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). Data can refer to data transmitted via data channels.

[0088] In addition, control signals The reference signal processing unit 240 can perform processing related to the transmission and reception of messages and commands related to CHO and LTM. Specifically, control signals... The reference signal processing unit 240 can receive messages from the network containing execution conditions for cell migration (handover) that comply with CHO or LTM.

[0089] More specifically, control signals The reference signal processing unit 240 can receive an RRC Reconfiguration containing the execution condition from the network (gNB100). In this embodiment, the control signal The reference signal processing unit 240 can be configured as a receiving unit. Furthermore, the message can be another message from the RRC layer, or a message from a lower layer (PHY or MAC).

[0090] In addition, control signals The reference signal processing unit 240 can receive messages containing measurement settings for cell quality. Specifically, control signals... The reference signal processing unit 240 can receive RRC messages or system information (SIB: System Information Block) including measConfig, which is an information element (IE) specified in 3GPP TS38.331.

[0091] The measConfig (measurement settings) can contain indications of priority. Here, priority can indicate the order of cell quality measurements based on the UE200, or the order of cells following a specific RAT (e.g., 4G). Alternatively, the priority can also indicate the order of priority for a specific frequency band. This specific band can be allocated to any RAT or shared by multiple RATs. Regarding this priority, for example, it can be represented by numbers from 0 to 7, or it can simply indicate that a specific type of cell, RAT, or frequency band has priority over others.

[0092] Thus, control signals The reference signal processing unit 240 can receive a measConfig (measurement setting) containing an indication of the priority. In this embodiment, the control signal The reference signal processing unit 240 can be configured as a receiving unit. Control signal The reference signal processing unit 240 may receive a measConfig containing an indication of the priority associated with either the measId (measurement identifier) ​​or the measObject (measurement object) specified in 3GPP TS38.331. That is, the priority may be associated with measId and / or measObject, or it may be associated with measConfig.

[0093] In addition, control signals The reference signal processing unit 240 can also receive system information (SIB) that includes an indication of priority. For example, control signals. The reference signal processing unit 240 may also receive SIBs containing the measurement priority of the frequency band (band) allocated to a specific RAT, or the priority of the (staying) frequency band used by the UE200. There is no particular limitation on the type of SIB; for example, SIBs related to cell reselection, such as SIB2, 4, and 5, can be used.

[0094] control signals The reference signal processing unit 240 can send a measurement report to the network, containing measurement results measured according to the measurement order determined by the aforementioned priority. In this embodiment, the control signal... The reference signal processing unit 240 can be configured as a transmitting unit.

[0095] control signals The reference signal processing unit 240 can send the higher-priority measurement report to the network earlier than the lower-priority measurement report. Specifically, the control signal The reference signal processing unit 240 can send a measurement report to the network with priority, including measurement results that are prioritized by the above-mentioned priority indication.

[0096] Furthermore, the network can construct measurement reporting that enables the UE to report measurement results for each SS / PBCH block. The network can construct measurement reporting that enables the UE to report measurement results for each SS / PBCH block(s), or it can construct measurement reporting that enables the UE to report measurement results for each cell based on SS / PBCH blocks. The network can also construct measurement reporting that enables the UE to report measurement results for each CSI-RS resource, or it can construct measurement reporting that enables the UE to report measurement results for each cell based on CSI-RS resources.

[0097] control signals The reference signal processing unit 240 can send cell migration-related messages to candidate cells of migration destinations that meet the execution conditions of CHO or LTM. In this embodiment, the control signal The reference signal processing unit 240 can be configured as a transmitting unit.

[0098] Specifically, control signals The reference signal processing unit 240 can send a message (also called a command) to the gNB100 to perform a handover (cell handover) according to CHO or LTM.

[0099] control signals The reference signal processing unit 240 can send capability information of the UE 200 to the network. For example, control signals. The reference signal processing unit 240 can send UE capability information related to CHO, LTM and measurement reporting trigger conditions to gNB100.

[0100] The encoding / decoding unit 250 performs data segmentation / linking and channel encoding / decoding for each predetermined communication target (gNB100 or other gNB).

[0101] Specifically, the encoding / decoding unit 250 divides the data output from the data transceiver unit 260 into predetermined sizes and performs channel coding on the divided data. Furthermore, the encoding / decoding unit 250 decodes the data output from the modem unit 230 and concatenates the decoded data.

[0102] The data transceiver unit 260 performs the transmission and reception of Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transceiver unit 260 performs the assembly / disassembly of PDUs / SDUs in multiple layers (Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP), etc.). In addition, the data transceiver unit 260 performs error correction and retransmission control based on Hybrid Automatic Repeat Request (HARQ).

[0103] The control unit 270 controls the functional blocks that constitute the UE 200. In particular, in this embodiment, the control unit 270 performs controls related to CHO, LTM, and NES.

[0104] Specifically, the control unit 270 controls the cell migration (handover) of the UE 200 according to LTM (Low-Layer Mobility Control). Additionally, the control unit 270 controls the cell migration (handover) according to Conditional Handover (CHO). In both LTM and CHO, an execution condition can be applied to determine whether to perform a cell migration (handover).

[0105] LTM can be interpreted as cell migration based on processing in the lower layers (L1 / L2) as described above, while CHO can be interpreted as cell migration based on processing in the higher layers (L3).

[0106] Thus, control unit 270 can perform UE-led cell migration independently of instructions from the network, provided that the execution condition of CHO or LTM is met. Furthermore, control unit 270 can prioritize cell migration to candidate cells utilizing a specific radio access technology (e.g., 6G) based on the RAT (6G or 5G) indication used by the candidate cells. The cell type to be prioritized (e.g., 6G cell) can be preset by UE 200 or indicated from the network.

[0107] Furthermore, the RAT instruction can target all candidate target cells or only candidate cells of a single RAT. Additionally, it can replace the RAT's own instruction with an instruction that prioritizes migration to candidate cells of a different RAT (Inter-RAT Cell). Furthermore, it can replace the RAT's own instruction, or in addition to the RAT's own instruction, apply an instruction indicating the priority of migration to that candidate cell.

[0108] Furthermore, the control unit 270 can also control the measurement order of multiple candidate cells based on the aforementioned priority. For example, the control unit 270 can prioritize the measurement of candidate cells with higher priority over the measurement of other candidate cells based on the priority associated with the measId (measurement identifier) ​​or measObject (measurement object). In this way, the control unit 270 can control the measurement order based on the measId (measurement identifier) ​​or measObject (measurement object) associated with the priority indication, and instruct the control signal... The reference signal processing unit 240 performs cell quality (wireless communication quality) measurements (RSRP, etc.).

[0109] Alternatively, the control unit 270 may control the measurement order based on different priorities for each radio access technology (RAT). For example, the control unit 270 may prioritize measurements of cells following 6G over measurements of cells following other RATs (e.g., 5G). Furthermore, the prioritized RAT can be arbitrarily determined based on the status of the wireless communication system 10 or the operator's intentions.

[0110] Furthermore, the control unit 270 can also control the measurement sequence based on different priorities for each frequency band. For example, if the priority of frequency band A (e.g., the 700MHz band) is higher than that of frequency band B (e.g., the 800MHz band), the control unit 270 can prioritize measurements of cells using frequency band A over measurements of cells using frequency band B. Additionally, the control unit 270 can prioritize handovers to cells using frequency band A over handovers to cells using frequency band B.

[0111] Furthermore, the control unit 270 can also perform cell quality measurements based on cell quality measurement information associated with the aforementioned RAT (Range Attention System) or similar indicators. As described above, the RAT or similar indicators can be associated with a measId (measurement identifier) ​​or a measObject (measurement object). Based on this associated measurement information, the control unit 270 can determine the measurement object and indicate control signals. The reference signal processing unit 240 performs cell quality (wireless communication quality) measurements (RSRP, etc.).

[0112] Furthermore, the control unit 270 can also apply a milder execution condition to candidate cells using a specific RAT (e.g., 6G) than to candidate cells using other RATs (e.g., 5G). Specifically, the control unit 270 can also set the thresholds (Thresh) for the aforementioned Measurement Reporting related events A3, A4, A5, B1, and B2 to a lower level (or it can be conceived as setting them to a lower level).

[0113] Alternatively, the control unit 270 may shorten the time to the start of Measurement Reporting (timeToTrigger) for candidate cells utilizing a specific RAT, or it may add an offset value to make the execution condition easier to satisfy. The control unit 270 may be designed such that the timeToTrigger is set to be shorter for candidate cells utilizing a specific RAT, or it may be designed such that the execution condition is easily satisfied.

[0114] The control unit 270 can also prioritize the measurement of cell quality of candidate cells using the same frequency band but different RATs, based on the cell quality measurement settings (measConfig) of the candidate cells. Specifically, the control unit 270 can prioritize the execution of intra-freq & inter-RAT measurements. More specifically, the control unit 270 can instruct control signals. The reference signal processing unit 240 prioritizes intra-freq and inter-RAT measurements.

[0115] In addition, gNB100 (control signal) The reference signal processing unit 240 may have functions corresponding to the UE 200 described above. For example, the gNB 100 may instruct the UE 200 on the threshold (Thresh) of events A3, A4, A5, B1, and B2 for candidate cells utilizing a specific RAT (e.g., 6G), the timeToTrigger up to measurement reporting, or the offset value. Furthermore, the gNB 100 (control signal...) The reference signal processing unit 240 can also instruct the UE200 to perform intra-freq and inter-RAT measurements of candidate cells using the same frequency band but different RATs with higher priority than other cells in the settings related to radio resource management (RRM).

[0116] gNB100 (control signal) Reference signal processing unit 240) can send measConfig to UE200 containing an indication of the priority associated with either measId (measurement identifier) ​​or measObject (measurement object). Additionally, gNB100 (control signal) The reference signal processing unit 240 can also broadcast system information (SIB) containing an indication of the priority.

[0117] (3) Operation of wireless communication system

[0118] Next, the operation of the wireless communication system 10 will be explained. Specifically, an example of operation related to cell migration of UE200 in the case of cells forming multiple RATs (4G cells, 5G cells, and 6G cells) will be explained.

[0119] (3.1) Prerequisites and topics

[0120] Figure 4 An example of a cell structure where 4G, 5G, and 6G cells coexist is shown. As described above, in the wireless communication system 10, 4G, 5G, and 6G RATs can be used simultaneously. Figure 4 As shown, UE200 can migrate from a 4G cell (or in other words, a standby state) to a 5G cell or a 6G cell.

[0121] In such a cell structure, there may be situations where UE200 may be preferentially migrated to any cell (e.g., a 6G cell). For example, operational reasons from the operator or the status of the wireless communication system 10 (e.g., whether there is congestion) could be cited.

[0122] The following action examples illustrate actions taken to enable UE200 to preferentially migrate to a cell of a specific RAT or to a cell utilizing a specific frequency band.

[0123] (3.2) Action Examples

[0124] Figure 5 This shows a basic timeline example related to measurement reporting. For example... Figure 5 As shown, the network (gNB100) can send RRC layer messages, including priority, to the UE200. Specifically, gNB100 can send RRC reconfiguration messages, including measConfig, to the UE200.

[0125] Thus, when configuring measConfig for UE200 using gNB100, an indication of priority can be assigned to measId (measurement identifier) ​​or measObject (measurement object). For example, this priority can be set to any of the priorities (0, 1, 2, 3, ... 7). Priority can be "7" for the highest and "0" for the lowest, or vice versa. Furthermore, priority does not necessarily have to be represented by a number; it can simply indicate whether it is prioritized.

[0126] Figure 6 This shows an example of the measConfig structure. For example... Figure 6 As shown, you can also assign priority (any one of 0 to 7) to measId or measObject (modes 1 and 2). Alternatively, you can assign priority (any one of 0 to 7) to the band information contained in measConfig (mode 3). Or, you can assign priority (any one of 0 to 7) to measConfig itself.

[0127] UE200 can begin execution from the measurement associated with the higher priority measId or measObject. Furthermore, during measurement reporting, UE200 can also prioritize reporting the measurement results associated with the higher priority measId or measObject to the network.

[0128] The gNB100 can set the measurement priority of 4G, 5G, and 6G frequencies for the UE, or the frequency priority used (stayed) by the UE. This setting can be performed, for example, using RRC layer messages. Specifically, RRCReconfiguration or RRCRelease can be used (but not limited to these RRC messages). Furthermore, the UE200 can perform measurements from the highest priority RAT or frequency (band).

[0129] Alternatively, the gNB100 can also use SIBs to broadcast measurement priorities for 4G, 5G, and 6G frequencies, or the frequency priorities used (stayed) by the UE. As mentioned above, the type of SIB is not particularly limited.

[0130] When UE200 is in idle state, it can also refer to the RAT or frequency priority contained in the SIB to select the RAT, frequency or cell with higher priority when performing cell selection or reselection.

[0131] Different measObjects can be set for 4G, 5G, and 6G frequencies respectively. That is, measObjects can be divided according to 4G, 5G, and 6G frequencies. Additionally, different measIds can be assigned to 4G, 5G, and 6G frequencies respectively. Here, the priority of the 6G frequency's measObject or measId can be made higher than that of other RAT frequencies.

[0132] The network can relax the conditions for measurement events of frequencies or cells that UE200 wishes to access first.

[0133] For example, if UE200 wants to prioritize access to a 6G cell, the network can set lower thresholds for events A3, A4, A5, B1, and B2 for the measurement of the cell it wants to prioritize access to.

[0134] The network (gNB100) can shorten the time until measurement reporting begins (timeToTrigger) and can also make the event easier to satisfy by appending an offset value.

[0135] Furthermore, the network (gNB100) can also prioritize intra-freq and inter-RAT measurements for UE200 during RRM configuration, specifically during measConfig configuration. That is, UE200 can prioritize performing intra-freq and inter-RAT measurements. Consequently, UE200 prioritizes reporting the results of intra-freq and inter-RAT measurements to the network, thus enabling UE200 to prioritize handover to an inter-RAT cell (e.g., a 6G cell).

[0136] In addition, when the network (gNB100) reports multiple Measurement Reports for 4G, 5G and 6G frequencies simultaneously, it can also enable UE200 to prioritize switching to the 6G frequency / cell.

[0137] As described above, MRSS can be applied in the wireless communication system 10, but it is not necessary to apply MRSS. That is to say, the above-described operation example can be performed even without applying MRSS.

[0138] Figure 7 Examples of 5G and 6G cell structures are shown. Figure 7 As shown, for example, when 5G cells A and B utilize the 800MHz frequency band and the 6G cell utilizes the 700MHz frequency band, when the measurement results of 5G cell B are reported in the measurement report, gNB100 can also use the measurement results of 5G cell B to enable UE200 to switch to the 6G cell (also known as the back cell) that utilizes a frequency band close to that of 5G cell B. That is, the measurement results of 5G cell B and 6G cell can be processed equally, and UE200 can be preferentially switched to the back cell (6G cell).

[0139] Based on the above-described operational examples, in the case of coexistence of 4G, 5G, and 6G cells, measurement settings or system information containing indicators of priority can be utilized. Furthermore, the UE200 can control the measurement order of multiple candidate cells based on this priority, sending a measurement report containing the measurement results measured in the order of measurement to the network. Specifically, the UE200 can send higher-priority measurement reports to the network earlier than lower-priority measurement reports.

[0140] Therefore, it enables UE200 to preferentially migrate to desired cells such as cells that follow a specific RAT.

[0141] Furthermore, this priority can be applied to each RAT or each frequency band used by the cell, thus allowing for more flexible migration of the UE200 to the desired cell.

[0142] Therefore, for specific cells and frequency bands such as 6G cells, the UE200 can be migrated more actively, thus meeting the needs of operators in situations where 4G, 5G, and 6G cells coexist.

[0143] (4) Other implementation methods

[0144] The above describes the embodiments, but the present invention is not limited to the embodiments described therein, and various modifications and improvements can be made, which will be obvious to those skilled in the art.

[0145] For example, in the above embodiments, CHO and LTM were used as examples, but the same action can be applied to any technology that enables UE-led cell migration without relying on instructions from the network. Furthermore, in the above embodiments, the coexistence of 4G, 5G, and 6G cells was described, but other RAT cells can also coexist, and it is also possible for any of the 4G, 5G, and 6G cells to not coexist.

[0146] Furthermore, in the above description, the terms configure, activate, update, indicate, enable, specify, and select can be interchanged. Similarly, the terms link, associate, correspond, and map can be interchanged, as can allocate, assign, monitor, and map.

[0147] Furthermore, specific, dedicated, UE specific, and UE dedicated can be used interchangeably. Similarly, common, shared, group-common, UE common, and UE shared can also be used interchangeably.

[0148] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0149] In addition, the block structure diagram used in the description of the above embodiments ( Figure 3 The diagram illustrates blocks organized by function. These functional blocks (components) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can be implemented by combining software with one or more of the aforementioned devices.

[0150] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, the functional block (structural part) that performs the sending function is called the transmitting unit or transmitter. In short, as mentioned above, there are no particular limitations on the implementation method.

[0151] Furthermore, the aforementioned gNB100 and UE200 (the device) can also function as a computer for processing the wireless communication method disclosed herein. Figure 8 This is a diagram illustrating an example of the hardware structure of the device. (As shown...) Figure 8As shown, the device can also be configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0152] Additionally, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of this device can be configured as either a device comprising one or more of the illustrated components, or a device without any components.

[0153] The functional blocks of the device (refer to) Figure 3 This can be achieved through any hardware element or combination of hardware elements of the computer device.

[0154] Furthermore, the functions of the device are implemented by reading predetermined software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls communication of communication device 1004 or controls at least one of reading and writing data in memory 1002 and storage device 1003.

[0155] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc.

[0156] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one direction of memory 1002 in the storage device 1003 and the communication device 1004, and performs various processes accordingly. The program is used to cause the computer to perform at least a portion of the actions described in the above embodiments. Moreover, the various processes described above can be executed by one processor 1001, or by two or more processors 1001 simultaneously or sequentially. The processor 1001 can also be implemented using more than one chip. Furthermore, the program can also be transmitted from a network via a telecommunications line.

[0157] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of the following: read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and random access memory (RAM). The memory 1002 may be referred to as a register, cache memory, main memory (main storage device), etc. The memory 1002 may store programs (program code), software modules, etc., capable of executing the methods involved in one embodiment of this disclosure.

[0158] Storage device 1003 is a computer-readable recording medium, and may be composed of at least one of the following: optical discs such as CD-ROM (Compact Disc ROM), hard disk drives, floppy disks, magneto-optical discs (e.g., compact discs, digital multipurpose discs, Blu-ray discs), smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. Storage device 1003 may also be referred to as an auxiliary storage device. The aforementioned recording medium may, for example, be a database, server, or other suitable media that includes at least one of memory 1002 and storage device 1003.

[0159] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. For example, it may also be called a network device, network controller, network card, communication module, etc.

[0160] The communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0161] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0162] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured using a single bus or different buses can be used between each device.

[0163] Furthermore, the device can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field-programmable gate array (FPGA), which can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0164] Furthermore, the notification of information is not limited to the forms / implementations described in this disclosure, and other methods may also be used. For example, the notification of information may also be implemented through 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. In addition, RRC signaling may also be referred to as RRC message, for example, it may be an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0165] The various forms / implementations described in this disclosure can also be applied to systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x being, for example, an integer or a decimal), 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 (registered trademark)), IEEE The system may include at least one of 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), other suitable systems, and next-generation systems based on these systems. Alternatively, multiple systems may be combined (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) for application.

[0166] The processing procedures, timing, and flow of the various forms / implementations described in this disclosure may be changed in order, provided there is no contradiction. For example, the elements of various steps are indicated using an illustrative order in the methods described in this disclosure, but are not limited to the specific order indicated.

[0167] In this disclosure, certain actions performed by the base station are sometimes also performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having a base station, it is obvious that various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes besides the base station (e.g., considering an MME or S-GW, but not limited to these). The above illustration depicts a case where there is only one other network node besides the base station, but it can also be a combination of multiple other network nodes (e.g., an MME and an S-GW).

[0168] It can output information and signals (information, etc.) from a higher (or lower) level to a lower (or higher) level. It can also be input or output through multiple network nodes.

[0169] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0170] The determination can be made by the value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparing numerical values ​​(e.g., comparing with a predetermined value).

[0171] The various forms / implementations described in this disclosure can be used individually or in combination, and can be switched depending on the execution. Furthermore, the notification of predetermined information (e.g., a "It is X" notification) is not limited to being explicit, but can also be implicit (e.g., not being notified of the predetermined information).

[0172] Software, whether called software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0173] In addition, software, commands, information, etc., can be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0174] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., that may be involved in the above description as a whole can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0175] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as carrier frequency, cell, frequency carrier, etc.

[0176] The terms “system” and “network” as used in this disclosure are used interchangeably.

[0177] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources can be indicated using indexes.

[0178] The names used for the parameters described above are non-limiting in any respect. Furthermore, the formulas, etc., using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any appropriate name, and therefore the various names assigned to these channels and information elements are non-limiting in any respect.

[0179] In this disclosure, the terms "Base Station (BS)," "wireless base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Sometimes, terms such as macro cell, small cell, femtocell, and picocell are also used to refer to base stations.

[0180] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through the base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0181] Terms such as “cell” or “sector” refer to a portion or the entire coverage area of ​​at least one of the base stations and base station subsystems that provide communication services within that coverage area.

[0182] In this disclosure, the base station sending information to the terminal can also be replaced by the base station instructing the terminal on information-based control / actions.

[0183] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably.

[0184] For mobile stations, those skilled in the art sometimes also use the following terms: 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 terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0185] At least one of the base station and mobile station can also be referred to as a transmitting device, receiving device, communication device, etc. Furthermore, at least one of the base station and mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object with an arbitrary speed of movement. It also includes situations where the mobile body is stationary. Examples of mobile bodies include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, Drone (registered trademark), multi-rotor helicopters, quadcopter helicopters, balloons, and objects mounted on them. Additionally, the mobile body can also be a mobile body that moves autonomously based on operating commands. It can be a means of transportation (e.g., car, airplane), a mobile body that moves unmanned (e.g., drone, autonomous vehicle), or a robot (humanized or unmanned). Furthermore, at least one of the base station and mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0186] Furthermore, the base station in this disclosure can also be replaced by a mobile station (user terminal, hereinafter the same). For example, various forms / implementations of this disclosure can also be applied to structures that replace communication between the base station and the mobile station with communication between multiple mobile stations (e.g., also referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the structure can also be configured such that the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" can also be replaced with terms corresponding to communication between terminals (e.g., "side"). For example, uplink channel, downlink channel, etc. can also be replaced with side channel (or side link).

[0187] Similarly, the mobile station in this disclosure can be replaced by a base station. In this case, the base station can also be configured to have the functions of a mobile station.

[0188] A radio frame can consist of one or more frames in the time domain. Each frame in the time domain is called a subframe. A subframe can also consist of one or more time slots in the time domain. A subframe can have a fixed duration (e.g., 1 ms) independent of the parameter set (numerology).

[0189] A parameter set can be communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set can represent at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, and specific windowing processing performed by the transceiver in the time domain.

[0190] In the time domain, a time slot can be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can be a time unit based on a set of parameters.

[0191] A time slot can contain multiple mini-time slots. Each mini-time slot can consist of one or more symbols in the time domain. Additionally, a mini-time slot can also be called a sub-time slot. A mini-time slot can consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (or PUSCH) mapping type B.

[0192] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can each be referred to by other corresponding names.

[0193] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., symbols 1-13), or a period longer than 1ms. In addition, the unit representing TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0194] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (bandwidth, transmit power, etc. available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0195] The Time Interval (TTI) can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a processing unit such as scheduling or link adaptation. Furthermore, when a TTI is given, the actual time interval (e.g., the number of symbols) that the transmission block, code block, codeword, etc., are mapped to can be shorter than that TTI.

[0196] Furthermore, when a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can become the minimum time unit for scheduling. Additionally, the number of time slots (mini-time slots) constituting this minimum time unit for scheduling can also be controlled.

[0197] A TTI with a duration of 1ms can also be called a normal TTI (TTI in LTE Rel.8-12), a regular TTI, a long TTI, a regular subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0198] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be understood as a TTI with a duration of more than 1ms, and a short TTI (e.g., a shortened TTI, etc.) can be understood as a TTI with a duration of less than a long TTI but more than 1ms.

[0199] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0200] Furthermore, the temporal domain of an RB can include one or more symbols, or it can be the length of a time slot, a mini-time slot, a subframe, or a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0201] In addition, one or more RBs can also be called Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0202] Furthermore, a resource block can consist of one or more resource elements (REs). For example, 1 RE can be a radio resource area with 1 subcarrier and 1 symbol.

[0203] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a given carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0204] A BWP can include a UL BWP and a DL BWP. One or more BWPs can be set for a UE within a single carrier.

[0205] At least one of the configured BWPs can be active, and it is not assumed that the UE will transmit or receive predetermined signals / channels outside of an active BWP. Furthermore, the terms "cell," "carrier," etc., used in this disclosure can be replaced with "BWP."

[0206] The structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc., can be varied in many ways.

[0207] The terms “connected,” “coupled,” or any variations thereof are intended to indicate any direct or indirect connection or combination between two or more elements, including cases where there is one or more intermediate elements between the two elements that are “connected” or “coupled.” The combination or connection between elements can be physical, logical, or a combination of these. For example, “access” can be used instead of “connected.” In the context of this disclosure, it can be understood that two elements are “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible regions) to “connect” or “couple” to each other.

[0208] The reference signal can be simply called the Reference Signal (RS), or, depending on the standard applied, the pilot.

[0209] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise expressly stated. In other words, the word "based on" means both "based on only" and "based on at least".

[0210] Alternatively, the "unit" in the structure of the above devices can be replaced with "section", "circuit", "equipment", etc.

[0211] Any reference to elements using the designations "first," "second," etc., as used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first or second element does not imply that only two elements can be used there, or that the first element must precede the second element in some form.

[0212] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," imply inclusion. Furthermore, the term "or" as used in this disclosure does not refer to XOR.

[0213] In this disclosure, for example, in cases where articles are added through translation, such as in English (e.g., a, an, and the), this disclosure may also include cases where the noun following these articles is in a plural form.

[0214] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" or "determining" may include situations where judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), or ascertaining are considered as "determining" or "determining." Furthermore, "determining" or "determining" may include situations where receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in memory) are considered as "determining" or "determining." Additionally, "determining" or "determining" may include situations where resolving, selecting, choosing, establishing, or comparing are considered as "determining" or "determining." That is, "judgment" and "decision" can include situations where certain actions are regarded as having been "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0215] In this disclosure, the phrase "A and B are different" can mean "A and B are not the same." Furthermore, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0216] Figure 9 An example of the structure of vehicle 2001 is shown. For example... Figure 9 As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gear shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013.

[0217] The drive unit 2002 may consist of, for example, an engine, a motor, or a hybrid power system of an engine and a motor.

[0218] The steering unit 2003 includes at least a steering wheel (also called a steering wheel) configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0219] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021-2027 of the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0220] The signals from various sensors 2021 to 2028 include current signals from current sensor 2021 that senses the current of the motor, speed signals of the front and rear wheels obtained by speed sensor 2022, air pressure signals of the front and rear wheels obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal input signals obtained by accelerator pedal sensor 2029, brake pedal input signals obtained by brake pedal sensor 2026, gear lever operation signals obtained by gear lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0221] The Information Service Unit 2012 consists of various devices such as a car navigation system, audio system, speakers, television, and radio, which provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information obtained from external devices via communication modules 2013, etc., to provide various multimedia information and multimedia services to the occupants of vehicle 1.

[0222] The Information Services Department 2012 may include input devices (such as keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from external sources, and may also include output devices (such as monitors, speakers, LEDs, touch panels, etc.) that implement output to external sources.

[0223] The Driver Assistance System 2030 comprises various devices used to prevent accidents or reduce driver workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyroscope systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the Driver Assistance System 2030 transmits and receives various information via the communication module 2013 to achieve driver assistance or autonomous driving functions.

[0224] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 1 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 2028 in the vehicle 2001 via the communication port 2033.

[0225] The communication module 2013, controlled by the microprocessor 2031 of the electronic control unit 2010, is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can be, for example, base stations, mobile stations, etc.

[0226] The communication module 2013 can also wirelessly transmit at least one of the signals input to the electronic control unit 2010 from the various sensors 2021-2028, the information obtained based on those signals, and the information obtained via the information service unit 2012 based on input from an external source (user) to an external device. The electronic control unit 2010, the various sensors 2021-2028, and the information service unit 2012 can also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 can contain information based on the aforementioned inputs.

[0227] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) sent from external devices and displays it on the information service unit 2012 provided by the vehicle. The information service unit 2012 can also be referred to as an output unit for outputting information (for example, outputting information to devices such as displays and speakers based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH). In addition, the communication module 2013 stores various information received from external devices in a memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axles 2009, sensors 2021 to 2028, etc., provided by the vehicle 2001 based on the information stored in the memory 2032.

[0228] (Postscript)

[0229] The above disclosure can also be expressed as follows. A first feature is a terminal comprising: a receiving unit that receives measurement settings including an indication of priority; a control unit that controls the measurement order of multiple candidate cells based on the priority; and a transmitting unit that transmits a measurement report to a network containing measurement results measured according to the measurement order.

[0230] The second feature is a terminal comprising: a receiving unit that receives system information including an indication of priority; a control unit that controls the measurement order of multiple candidate cells based on the priority; and a transmitting unit that transmits a measurement report to the network containing measurement results measured according to the measurement order.

[0231] The third feature is that, in the first or second feature, the sending unit sends the measurement report with higher priority to the network earlier than the measurement report with lower priority.

[0232] The fourth feature is that, in the first to third features, the control unit controls the measurement sequence based on the different priorities for each wireless access technology.

[0233] The fifth feature is that, in the first to fourth features, the control unit controls the measurement sequence based on the priority that varies for each frequency band.

[0234] The sixth feature is that, in the first to fifth features, the receiving unit receives the measurement settings including the instruction associated with either a measurement identifier or a measurement object, and the control unit controls the measurement sequence based on the measurement identifier or the measurement object associated with the instruction.

[0235] Label Explanation

[0236] 10 Wireless Communication Systems

[0237] 20 NG-RAN

[0238] 100 gNB

[0239] 200 UE

[0240] 210 Wireless Signal Transceiver Unit

[0241] 220 Enlarged Section

[0242] 230 Modulation and Demodulation Section

[0243] 240 Control Signal & Reference Signal Processing Unit

[0244] 250 Encoding / Decoding Unit

[0245] 260 Data Transceiver Department

[0246] 270 Control Department

[0247] 1001 processor

[0248] 1002 Memory

[0249] 1003 Storage device

[0250] 1004 Communication device

[0251] 1005 Input Device

[0252] 1006 Output Device

[0253] 1007 bus

[0254] Vehicle 2001

[0255] 2002 Drive Unit

[0256] 2003 Steering Unit

[0257] 2004 Accelerator Pedal

[0258] 2005 Brake Pedal

[0259] 2006 gearshift lever

[0260] Front wheels around 2007

[0261] 2008 rear wheels (left and right)

[0262] 2009 axle

[0263] 2010 Electronic Control Department

[0264] 2012 Information Service Department

[0265] 2013 Communication Module

[0266] 2021 Current Sensor

[0267] 2022 Speed ​​Sensor

[0268] 2023 Barometric Pressure Sensor

[0269] 2024 vehicle speed sensor

[0270] 2025 Accelerometer

[0271] 2026 Brake Pedal Sensor

[0272] 2027 Gearshift sensor

[0273] 2028 Object Detection Sensor

[0274] 2029 Accelerator Pedal Sensor

[0275] 2030 Driver Assistance Systems Department

[0276] 2031 microprocessor

[0277] 2032 Memory (ROM, RAM)

[0278] 2033 Communication Port

Claims

1. A terminal, comprising: The receiving unit receives measurement settings that include an indication of priority; A control unit, which controls the measurement order of multiple candidate cells based on the aforementioned priority; and The transmitting unit sends a measurement report to the network containing the measurement results measured in the order stated in the measurement.

2. A terminal, comprising: The receiving unit receives system information containing an indication of priority; A control unit, which controls the measurement order of multiple candidate cells based on the aforementioned priority; and The transmitting unit sends a measurement report to the network containing the measurement results measured in the order stated in the measurement.

3. The terminal according to claim 1 or 2, wherein, The sending unit sends the measurement report with higher priority to the network earlier than the measurement report with lower priority.

4. The terminal according to claim 1 or 2, wherein, The control unit controls the measurement sequence based on the different priorities for each wireless access technology.

5. The terminal according to claim 1 or 2, wherein, The control unit controls the measurement sequence based on the different priorities for each frequency band.

6. The terminal according to claim 1, wherein, The receiving unit receives the measurement settings, including the instruction associated with either the measurement identifier or the measurement object. The control unit controls the measurement sequence based on the measurement identifier or the measurement object associated with the indication.

Images