Methods and apparatus for reporting enhanced early measurement results in next-generation mobile communication systems

Abstract

This disclosure relates to fifth-generation (5G) or sixth-generation (6G) communication systems for supporting higher data rates. A method performed by a terminal in a wireless communication system. The method includes: receiving a Radio Resource Control (RRC) release message including measurement configuration information from a base station; entering an RRC idle state or an RRC inactive state based on the RRC release message; receiving system information from the base station, the system information including information indicating whether the terminal performs measurements while camped in a cell and reports measurement availability in the case of establishing or resuming a connection in the cell; performing measurements based on the measurement configuration information in the RRC idle state or the RRC inactive state; performing an RRC connection procedure with the base station; receiving a User Equipment (UE) information request message including a request for verified measurements from the base station; and sending a UE information response message including verified measurements to the base station.

Description

Technical Field

[0001] This disclosure relates to the operation of user equipment (UE) and base stations in mobile communication systems. More specifically, this disclosure relates to methods and apparatus for transmitting enhanced early measurement results. Background Technology

[0002] Fifth-generation (5G) mobile communication technology defines wide bandwidths to enable high transmission rates and new services, and can be implemented not only in "sub-6GHz" bands such as 3.5GHz, but also in "above-6GHz" bands including 28GHz and 39GHz, known as millimeter waves (mmWave). Furthermore, sixth-generation (6G) mobile communication technology (called "super 5G systems") is being considered in terahertz bands (e.g., the 95GHz to 3THz band) to achieve transmission rates fifty times faster than 5G and ultra-low latency one-tenth that of 5G.

[0003] In the initial stages of 5G mobile communication technology, to support and meet the performance requirements of services related to enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive machine-type communication (mMTC), ongoing standardization is underway regarding the following aspects: beamforming and massive multiple-input multiple-output (MIMO) to mitigate radio wave path loss and increase radio wave transmission distance in millimeter waves; parameter sets for dynamic operation of millimeter wave resources and time slot formats (e.g., operating multiple subcarrier spacings); initial access technologies to support multi-beam transmission and broadband; definition and operation of bandwidth portions (BWP); new channel coding methods such as low-density parity-check (LDPC) codes for high-capacity data transmission and polar codes for highly reliable transmission of control information; layer 2 (L2) preprocessing; and network slicing for providing dedicated networks tailored to specific services.

[0004] Currently, given the services that 5G mobile communication technology needs to support, discussions are underway regarding improvements and performance enhancements to the initial 5G mobile communication technology, and physical layer standardization has been implemented for technologies such as: Vehicle-to-Everything (V2X), used to assist autonomous vehicles in making driving decisions based on vehicle location and status information sent by the vehicle and to enhance user convenience; New Radio Unlicensed (NR-U), designed to comply with various regulatory requirements in unlicensed frequency bands; New Radio (NR) UE power saving; Non-Terrestrial Network (NTN), used to ensure UE-satellite direct communication coverage in areas where communication with terrestrial networks is unavailable; and positioning.

[0005] Furthermore, standardization is underway in the wireless interface architecture / protocol domain for technologies such as: Industrial Internet of Things (IIoT) for supporting new services through interoperability and convergence with other industries; Integrated Access and Backhaul (IAB) for providing nodes for network service area extension by supporting wireless backhaul and access links in an integrated manner; mobility enhancements including conditional handover and Dual Active Protocol Stack (DAPS) handover; and two-step random access (RACH for NR) for simplifying random access procedures. Standardization is also underway in the system architecture / service domain for technologies such as: 5G baseline architectures (e.g., service-based architectures or service-based interfaces) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for UE location-based reception services.

[0006] If this 5G mobile communication system is commercialized, the already exponentially growing number of connected devices will connect to the communication network, and therefore, enhanced functionality and performance of the 5G mobile communication system, as well as integrated operation of connected devices, are expected to be necessary. To this end, new research related to extended reality (XR) has been arranged to efficiently support augmented reality (AR), virtual reality (VR), mixed reality (MR), etc., by leveraging artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication, while improving 5G performance and reducing complexity.

[0007] Furthermore, this development of 5G mobile communication systems will not only serve as the foundation for developing new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, full-dimensional MIMO (FD-MIMO), multi-antenna transmission technologies such as array antennas and massive MIMO, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using orbital angular momentum (OAM), and reconfigurable smart surfaces (RIS), but will also serve as the foundation for developing full-duplex technologies to improve the frequency efficiency of 6G mobile communication technology and improve system networks, AI-based communication technologies to achieve system optimization and internalize end-to-end AI support functions by leveraging satellites and artificial intelligence (AI) from the design stage, and next-generation distributed computing technologies to achieve services with complexity exceeding the operational capabilities of UEs by utilizing ultra-high-performance communication and computing resources.

[0008] The above information is presented as background information only to aid in understanding this disclosure. No determination or assertion is made regarding whether any of the above content can be used as prior art with respect to this disclosure. Summary of the Invention

[0009] Technical issues

[0010] The aspects of this disclosure will at least address the aforementioned problems and / or disadvantages, and provide at least the following advantages. Therefore, one aspect of this disclosure is to provide apparatus and methods for efficiently providing measurement reports in a communication system.

[0011] Other aspects will be set forth in part in the description which follows, and will also become apparent from the description, or may be learned by practice of the embodiments presented.

[0012] Solution to the problem

[0013] According to one aspect of this disclosure, a method performed by a terminal is provided. The method includes: receiving a Radio Resource Control (RRC) release message including measurement configuration information from a base station; entering an RRC idle state or an RRC inactive state based on the RRC release message; receiving system information from the base station, the system information including information indicating whether the terminal performs measurements while camped in a cell and reports measurement availability in the case of establishing or resuming a connection in the cell; performing measurements based on the measurement configuration information in the RRC idle state or the RRC inactive state; performing an RRC connection procedure with the base station; receiving a User Equipment (UE) information request message including a request for verified measurements from the base station; and sending a UE information response message including verified measurements to the base station.

[0014] According to another aspect of this disclosure, a method performed by a base station is provided. The method includes: sending a Radio Resource Control (RRC) release message including measurement configuration information to a terminal; based on the RRC release message, sending system information to the terminal in an RRC idle state or an RRC inactive state, the system information including information indicating whether the terminal performs measurements while camped in a cell and reporting measurement availability in the case of establishing or resuming a connection in the cell; performing an RRC connection procedure with the terminal; sending a User Equipment (UE) Information Request message including a request for verified measurements to the terminal; and receiving a UE Information Response message including verified measurements from the terminal.

[0015] According to another aspect of this disclosure, a terminal is provided. The terminal includes: a transceiver and a controller connected to the transceiver, wherein the controller is configured to receive a Radio Resource Control (RRC) release message including measurement configuration information from a base station; enter an RRC idle state or an RRC inactive state based on the RRC release message; receive system information from the base station, the system information including information indicating whether the terminal performs measurements while camped in a cell and reports measurement availability in the event of establishing or resuming a connection in the cell; perform measurements based on the measurement configuration information in the RRC idle state or RRC inactive state; perform an RRC connection procedure with the base station; receive a User Equipment (UE) Information Request message including a request for verified measurements from the base station; and send a UE Information Response message including verified measurements to the base station.

[0016] According to another aspect of this disclosure, a base station is provided. The base station includes a transceiver and a controller connected to the transceiver, wherein the controller is configured to send a Radio Resource Control (RRC) release message including measurement configuration information to a terminal; send system information to a terminal in an RRC idle state or an RRC inactive state based on the RRC release message, the system information including information indicating whether the terminal performs measurements while camped in a cell and reporting measurement availability in the event of establishing or resuming a connection in the cell; perform an RRC connection procedure with the terminal; send a User Equipment (UE) Information Request message including a request for verified measurements to the terminal; and receive a UE Information Response message including verified measurements from the terminal.

[0017] Beneficial effects of the invention

[0018] According to embodiments of this disclosure, measurement reports can be efficiently executed in a communication system.

[0019] Other aspects, advantages, and salient features of this disclosure will become apparent to those skilled in the art from the following detailed description of various embodiments disclosed in conjunction with the accompanying drawings. Attached Figure Description

[0020] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1a The structure of a Long Term Evolution (LTE) system according to an embodiment of the present disclosure is shown;

[0022] Figure 1b The radio protocol structure of an LTE system according to an embodiment of the present disclosure is shown;

[0023] Figure 1c The structure of a next-generation mobile communication system according to an embodiment of the present disclosure is shown;

[0024] Figure 1d A radio protocol structure for a next-generation mobile communication system according to an embodiment of the present disclosure is shown;

[0025] Figure 1e This is a flowchart illustrating the operation of a user equipment (UE) in RRC idle mode (RRC_IDLE) storing and reporting early measurement results according to relevant technologies;

[0026] Figure 1f This is a flowchart illustrating the operation of a UE in RRC inactive mode (RRC_INACTIVE) storing and reporting early measurement results according to relevant technologies;

[0027] Figure 1g This is a flowchart illustrating the operation of a base station enabling a UE to perform enhanced early measurement results in a next-generation mobile communication system according to embodiments of the present disclosure;

[0028] Figure 1h This is a flowchart illustrating operation according to an embodiment of the present disclosure, wherein a UE configured to perform enhanced early measurements in a next-generation mobile communication system sends an indicator to a base station indicating the presence or absence of a result value of the measurement, or an indicator or information indicating that the measurement should continue;

[0029] Figure 1i This is a block diagram illustrating the internal structure of a UE according to an embodiment of the present disclosure; and

[0030] Figure 1j This is a block diagram illustrating the configuration of a novel radio (NR) base station according to an embodiment of the present disclosure.

[0031] Throughout the accompanying drawings, it should be noted that the same reference numerals are used to depict the same or similar elements, features, and structures. Detailed Implementation

[0032] The following description with reference to the accompanying drawings is intended to aid in a full understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. It includes various specific details to aid understanding, but these are considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Additionally, for clarity and brevity, descriptions of well-known functions and structures may be omitted.

[0033] The terms and words used in the following description and claims are not limited to their literal meaning, but are used by the inventors only to enable a clear and consistent understanding of this disclosure. Therefore, those skilled in the art should understand that the following description of various embodiments of this disclosure is for illustrative purposes only and is not intended to limit the scope of this disclosure as defined by the appended claims and their equivalents.

[0034] It should be understood that, unless the context clearly specifies otherwise, the singular forms “a,” “an,” and “the” include plural indicators. Thus, for example, a reference to “component surface” includes a reference to one or more such surfaces.

[0035] In the following description, for ease of description, terms for identifying access nodes, referring to network entities, referring to messages, referring to interfaces between network entities, referring to various types of identification information, etc., are used illustratively. Therefore, this disclosure is not limited to the terms described below, and other terms that refer to subjects with equivalent technical meanings may also be used.

[0036] In the following description, for ease of description, the terms and names defined in the 3GPP LTE standard will be used. However, this disclosure is not limited to these terms and names and can be applied in the same manner to systems conforming to other standards. In this disclosure, for ease of description, the term "evolved Node B (eNB)" may be used interchangeably with the term "next-generation Node B (gNB)". That is, a base station described as "eNB" may refer to "gNB".

[0037] It should be understood that the boxes in each flowchart and the combination of flowcharts can be executed by one or more computer programs including instructions. The entirety of one or more computer programs can be stored in a single memory device, or one or more computer programs can be divided into different parts stored in multiple different memory devices.

[0038] Any function or operation described herein can be processed by a processor or a combination of processors. A processor or a combination of processors is circuitry that performs processing and includes circuitry such as an application processor (AP, e.g., a central processing unit (CPU)), a communication processor (CP, e.g., a modem), a graphics processing unit (GPU), a neural processing unit (NPU) (e.g., an artificial intelligence (AI) chip), a Wi-Fi chip, a Bluetooth® chip, a global positioning system (GPS) chip, a near field communication (NFC) chip, a connectivity chip, a sensor controller, a touch controller, a fingerprint sensor controller, a display driver integrated circuit (IC), an audio CODEC (codec) chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system-on-a-chip (SoC), an IC, etc.

[0039] Figure 1a The structure of an LTE system according to an embodiment of the present disclosure is shown.

[0040] refer to Figure 1a As shown, the radio access network of the LTE system includes next-generation base stations (Evolved Node B, hereinafter referred to as ENB, Node B, or base station) 1a-05, 1a-10, 1a-15, and 1a-20, Mobility Management Entity (MME) 1a-25, and Service Gateway (S-GW) 1a-30. User equipment (hereinafter referred to as UE or terminal) 1a-35 accesses the external network through ENB 1a-05 to 1a-20 and S-GW 1a-30.

[0041] exist Figure 1aIn the LTE system, ENBs 1a-05 to 1a-20 each correspond to a conventional Node B in the Universal Mobile Telecommunications System (UMTS). The ENB connects to UE 1a-35 via a radio channel and performs a more complex role than a conventional Node B. In the LTE system, since all user services, including real-time services such as Voice over Internet Protocol (VoIP) via the Internet Protocol, are served through a shared channel, a device is needed to collect state information (such as the UE's buffer state, available transmit power state, and channel state) and perform scheduling accordingly. ENBs 1-05 to 1-20 serve as this device. Typically, one ENB controls multiple cells. For example, to achieve a transmission rate of 100 Mbps, the LTE system uses Orthogonal Frequency Division Multiplexing (OFDM) as the radio access technology in a bandwidth of, for example, 20 MHz. Furthermore, the LTE system employs an Adaptive Modulation and Coding (AMC) scheme to determine the modulation scheme and channel coding rate based on the UE's channel state. The S-GW 1a-30 is a device that provides data bearers and generates or removes data bearers under the control of the MME 1a-25. The MME is a device responsible for various control functions and UE mobility management functions, and is connected to multiple base stations.

[0042] Figure 1b The radio protocol structure of an LTE system according to an embodiment of the present disclosure is shown.

[0043] refer to Figure 1b The radio protocols of the LTE system include Packet Data Convergence Protocol (PDCP) 1b-05 or 1b-40, Radio Link Control (RLC) 1b-10 or 1b-35, and Media Access Control (MAC) 1b-15 or 1b-30 on each of the UE and ENB sides. PDCP 1b-05 or 1b-40 is responsible for operations such as Internet Protocol (IP) header compression / reconstruction. The main functions of PDCP are summarized below.

[0044] - Header compression and decompression: Robust header compression only (ROHC)

[0045] -Transmit user data

[0046] - In the PDCP re-establishment procedure of RLC Acknowledgment Mode (AM), upper-layer protocol data units (PDUs) are delivered sequentially.

[0047] - For split bearers in dual connectivity (DC) (RLC AM only): PDCP PDU routing for transmission and PDCP PDU reordering for reception.

[0048] - Repeatedly detect the lower-layer service data unit (SDU) during the PDCP reconstruction procedure of RLC AM.

[0049] - Retransmit PDCP SDU during handover, and for split bearers in the DC, retransmit PDCP PDU in the PDCP data recovery procedure for RLC AM.

[0050] - Encryption and decryption

[0051] - Timer-based SDU dropping in the uplink

[0052] Radio Link Control (RLC) 1b-10 or 1b-35 reconfigures PDCP Protocol Data Units (PDUs) to an appropriate size to perform Automatic Repeat Request (ARQ) operations. The main functions of the RLC are summarized below.

[0053] -Transmit upper-layer PDU

[0054] - Error correction via ARQ (for AM data transmission only)

[0055] - Cascading, segmentation, and reassembly of RLC SDUs (for Unacknowledged Mode (UM) and AM data transfer only)

[0056] - Resegmentation of RLC data PDUs (for AM data transmission only)

[0057] - Reordering of RLC data PDUs (for UM and AM data transfer only)

[0058] - Duplicate detection (only for UM and AM data transmission)

[0059] - Protocol error detection (for AM data transmission only)

[0060] -RLC SDU discard (only for UM and AM data transfer)

[0061] -RLC Reconstruction

[0062] The MAC 1b-15 or 1b-30 connects to several RLC layer devices configured in a single terminal and performs operations such as multiplexing RLCPDUs to MAC PDUs and demultiplexing MAC PDUs to RLC PDUs. The main functions of the MAC are summarized below.

[0063] Mapping between logical channels and transport channels

[0064] - Multiplexing MAC SDUs belonging to one or different logical channels into a transport block (TB) delivered to the physical layer on the transport channel / Demultiplexing MAC SDUs belonging to one or different logical channels from a transport block (TB) delivered from the physical layer on the transport channel.

[0065] - Scheduling Information Report

[0066] Error correction via Hybrid Automatic Repeat Request (HARQ)

[0067] Priority processing between logical channels of a UE

[0068] - Prioritization among UEs is performed through dynamic scheduling.

[0069] - Multimedia Broadcast / Multicast Service (MBMS) identifier

[0070] -Transmission format selection

[0071] -filling

[0072] Physical layer 1b-20 or 1b-25 performs channel coding and modulation of upper-layer data to obtain OFDM symbols and deliver them via radio channels, or demodulates OFDM symbols received via radio channels, performs channel decoding, and delivers them to the upper layer.

[0073] Figure 1c The structure of a next-generation mobile communication system according to an embodiment of the present disclosure is shown.

[0074] refer to Figure 1c The radio access network for next-generation mobile communication systems (hereinafter referred to as NR or 5G) includes next-generation base stations (new radio nodes B, hereinafter referred to as NR gNB or NR base stations) 1c-10 and new radio core network (NR CN) 1c-05. User terminals (new radio user equipment, hereinafter referred to as NR UE or NR terminal) 1c-15 access external networks via NR gNB 1c-10 and NRCN 1c-05.

[0075] exist Figure 1cIn this context, NR gNB 1c-10 corresponds to the Evolved Node B (eNB) of a traditional LTE system. NR gNB 1c-10 connects to NR UE 1c-15 via a radio channel (i.e., Radio Access 1c-20) and offers superior service compared to a traditional Node B. In next-generation mobile communication systems, since all user services, including real-time services such as Voice over IP (VoIP) via the Internet Protocol, are served through shared channels, a device is needed to collect state information (such as buffer status, available transmit power status, and the UE's channel state) and perform scheduling accordingly; NR gNB 1c-10 serves as this device. Typically, one NR gNB controls multiple cells. To achieve ultra-high-speed data transmission exceeding current LTE, next-generation mobile communication systems can have bandwidths wider than the current maximum bandwidth, employing Orthogonal Frequency Division Multiplexing (OFDM) as the radio access technology, and further integrating beamforming technology. Furthermore, next-generation mobile communication systems employ an Adaptive Modulation and Coding (AMC) scheme to determine the modulation scheme and channel coding rate based on the UE's channel state. The NR CN 1c-05 performs functions such as mobility support, bearer configuration, and quality of service (QoS) configuration. The NRCN is responsible for various control functions and UE mobility management functions, and connects to multiple base stations. Furthermore, the next-generation mobile communication system can interoperate with existing LTE systems, and the NR CN connects to the MME 1c-25 via a network interface. The MME connects to the eNB 1c-30, which serves as an existing base station.

[0076] Figure 1d A radio protocol structure for a next-generation mobile communication system according to an embodiment of the present disclosure is shown.

[0077] Figure 1d The radio protocol structure of the next-generation mobile communication system to which this disclosure applies is shown.

[0078] refer to Figure 1d The radio protocols for next-generation mobile communication systems include NR SDAP 1d-01 or 1d-45, NR PDCP 1d-05 or 1d-40, NR RLC 1d-10 or 1d-35, and NR MAC 1d-15 or 1d-30 on each of the UE and NR base station sides.

[0079] The main functions of NR SDAP 1d-01 or 1d-45 may include the following.

[0080] -Transmit user plane data

[0081] - Mapping between QoS flows and Data Radio Bearers (DRBs) for both downlink (DL) and uplink (UL).

[0082] - Mark QoS flow IDs in both DL and UL groups

[0083] - Reflection QoS flow to DRB mapping for UL SDAP PDU

[0084] Regarding SDAP layer devices, the UE can be configured via RRC messages to use the SDAP layer device header or to use the SDAP layer device functionality for each PDCP layer device, each bearer, or each logical channel. If the SDAP header is configured, a 1-bit indicator for Non-Access Stratum (NAS) QoS reflection configuration (NAS reflected QoS) and a 1-bit indicator for AS QoS reflection configuration (AS reflected QoS) can be included in the SDAP header. This allows the UE to update or reconfigure the mapping information for uplink and downlink QoS flows and data bearers. The SDAP header can include QoS flow ID information indicating QoS. QoS information can be used for data processing priority, scheduling information, etc., to smoothly support service.

[0085] The main functions of NR PDCP 1d-05 or 1d-40 may include some of the following functions.

[0086] -Header compression and decompression: ROHC only

[0087] -Transmit user data

[0088] - Sequential delivery of upper-layer PDUs

[0089] -Disordered delivery of upper-layer PDUs

[0090] - Reordering of received PDCP PDUs

[0091] -Duplicate detection of lower-level SDUs

[0092] -PDCP SDU retransmission

[0093] - Encryption and decryption

[0094] - Timer-based SDU dropping in the uplink

[0095] Reordering in an NR PDCP device refers to the function of reordering PDCP PDUs received from the lower layer according to the order based on the PDCP sequence number (SN). It may include the function of transmitting data to the upper layer in the rearranged order, the function of transmitting data directly without considering the order, the function of rearranging the order to record lost PDCP PDUs, the function of reporting the status of lost PDCP PDUs to the transmission side, or the function of requesting the retransmission of lost PDCP PDUs.

[0096] The main functions of NR RLC 1d-10 or 1d-35 may include some of the following functions.

[0097] -Transmit upper-layer PDU

[0098] - Sequential delivery of upper-layer PDUs

[0099] -Disordered delivery of upper-layer PDUs

[0100] -Error correction via ARQ

[0101] Cascading, segmentation, and reassembly of RLC SDUs

[0102] - Resegmentation of RLC data PDUs

[0103] - RLC data PDU reordering

[0104] -Duplicate detection

[0105] -Protocol error detection

[0106] -RLC SDU discard

[0107] -RLC Reconstruction

[0108] The sequential delivery of NR RLC devices refers to the function of sequentially delivering RLC SDUs received from the lower layer to the upper layer. This may include functions such as reassembling and transmitting the reassembled RLC SDUs if an original RLC SDU is split into several RLC SDUs and then received; functions such as rearranging received RLC PDUs by referencing the RLC sequence number (SN) or PDCP sequence number (SN); functions such as reordering to record lost RLC PDUs; functions such as reporting the status of lost RLC PDUs to the transmission side; functions such as requesting retransmission of lost RLC PDUs; functions such as sequentially transmitting only RLC SDUs preceding the lost RLC SDU to the upper layer if a lost RLC SDU exists; functions such as sequentially transmitting all RLC SDUs received before the timer starts, even if a lost RLC SDU exists, if a predetermined timer has expired; or functions such as sequentially transmitting all RLC SDUs received up to the current timer to the upper layer, even if a lost RLC SDU exists, if a predetermined timer has expired. Additionally, the sequential delivery capability of the NR RLC device may include the ability to process RLC PDUs in the order of reception (regardless of sequence number order, but in the order of arrival) and deliver them to the PDCP device regardless of order (out-of-order delivery), and may include the ability to receive segments stored in a buffer or to be received later in the case of fragmentation, reconfigure them into a complete RLC PDU, process them, and deliver them to the PDCP device. The NR RLC layer may not include concatenation functionality, which may be performed in the NR MAC layer or replaced by multiplexing functionality of the NR MAC layer.

[0109] Out-of-order delivery of NR RLC devices refers to the function of immediately delivering RLC SDUs received from lower layers to upper layers regardless of order. This may include the function of reassembling and delivering multiple RLC SDUs that are divided from a single original RLC SDU if received. It may also include the function of storing the RLC SN or PDCP SN of the received RLC PDUs and recording any lost RLC PDUs as a result of the reordering.

[0110] NR MAC 1d-15 or 1d-30 can connect to multiple NR RLC layer devices configured in a UE, and the main functions of NR MAC can include the following.

[0111] Mapping between logical channels and transport channels

[0112] - MAC SDU multiplexing / demultiplexing

[0113] - Scheduling Information Report

[0114] - Error correction via HARQ

[0115] Priority processing between logical channels of a UE

[0116] - Prioritization among UEs is performed through dynamic scheduling.

[0117] -MBMS service identifier

[0118] -Transmission format selection

[0119] -filling

[0120] The NR PHY layer 1d-20 or 1d-25 can perform channel coding and modulation operations on upper-layer data to obtain OFDM symbols and deliver them via radio channels, or demodulate OFDM symbols received via radio channels, perform channel decoding, and deliver them to the upper layer.

[0121] Figure 1e This is a flowchart illustrating the operation of a UE in RRC idle mode (RRC_IDLE) storing and reporting early measurement results according to relevant technologies.

[0122] refer to Figure 1e UE 1e-01 can be in RRC connection mode (RRC_CONNECTED) by establishing an RRC connection with NR base station 1e-02 (operation 1e-05).

[0123] In Operation 1e-10, UE 1e-01 in RRC connection mode can receive an RCRelease message from NR base station 1e-02. The RCRelease message may contain measIdleConfig, which contains early measurement configuration (idle / inactive measurement configuration). measConfig may contain at least one of the following information.

[0124] -measIdleCarrierListNR: A list of NR carriers for which early measurements (idle / inactive measurements) are performed in RRC idle mode or RRC inactive mode (RRC_INACTIVE). Each NR carrier may contain at least one of the following information.

[0125]

[0126] -measIdleCarrierListEUTRA: A list of E-UTRA carriers for which measurements are performed in RRC idle mode. Each E-UTRA carrier may contain at least one of the following information.

[0127]

[0128] -measIdleDuration: The duration value (T331 timer value) for performing early measurements in RRC idle mode or RRC inactive mode.

[0129] -validityAreaList: A list of frequencies for which the UE is requested to perform early measurements in RRC idle mode or RRC inactive mode and / or a list of cells for each frequency.

[0130] A UE in RRC connection mode can apply the measIdleConfig contained in the RRCRelease message. For example, when configured to establish measIdleConfig,

[0131] The UE can store the received measIdleDuration in VarMeasIdleConfig. Additionally, the UE can drive the T331 timer based on the measIdleDuration value.

[0132] - If measIdleConfig contains measIdleCarrierListNR, the UE can store the received measIdleCarrierListNR in VarMeasIdleConfig.

[0133] - If measIdleConfig contains measIdleCarrierListEUTRA, the UE can store the received measIdleCarrierListEUTRA in VarMeasIdleConfig.

[0134] - If measIdleConfig contains validityAreaList, the UE can store the received validityAreaList in VarMeasIdleConfig.

[0135] In Operation 1e-15, a UE in RRC connected mode can switch to RRC idle mode (RRC_IDLE).

[0136] In Operation 1e-20, a UE in RRC idle mode can obtain system information to camp on the appropriate NR cell 1e-02. Additionally, the UE can obtain or update its idle / inactive measurement configuration (measIdleConfigSIB) via system information broadcast by the cell. Furthermore, the system information may include indicators (idleModeMeasurementNR, which indicates that a UE configured for NR idle / inactive measurements should perform measurements while camped in that cell and report the availability of these measurements when establishing or restoring a connection to the appropriate cell) indicating whether the UE needs to perform idle / inactive measurements and instructing the UE to report the availability of these measurements when establishing or restoring a connection in that cell.

[0137] In Operation 1e-25, a UE in RRC idle mode can perform idle / inactive measurements. Specifically, a UE in RRC idle mode can perform idle / inactive measurements while the T331 timer is running, and the specific UE operation is as follows.

[0138] 1> Perform the measurement according to the following requirements:

[0139] 2> If VarMeasIdleConfig includes measIdleCarrierListEUTRA, and SIB1 includes idleModeMeasurementsEUTRA:

[0140] 3> For each entry in measIdleCarrierListEUTRA within VarMeasIdleConfig:

[0141] 4> If the UE supports NE-DC between the serving carrier and the carrier frequency indicated by the carrierFreqEUTRA in the corresponding entry:

[0142] 5> Perform measurements at the carrier frequency and bandwidth indicated by the carrierFreq and allowedMeasBandwidth in the corresponding entries;

[0143] 5> If reportQuantitiesEUTRA is set to rsrq:

[0144] 6> Consider RSRQ as a sorting parameter;

[0145] 5> Otherwise:

[0146] 6> Consider RSRP as a sorting metric;

[0147] 5> If measCellListEUTRA is included:

[0148] 6> Consider the cells identified by each entry in measCellListEUTRA for measurement reports applicable to idle / inactive modes;

[0149] 5> Otherwise:

[0150] 6> Based on the sorting quantity, consider up to maxCellMeasIdle of the strongest cells identified as suitable for idle / inactive measurement reports;

[0151] 5> For all cells applicable to idle / inactive measurement reports, export the measurement results for the quantities indicated by reportQuantitiesEUTRA;

[0152] 5> The derived measurement results, as indicated by reportQuantitiesEUTRA within measReportIdleEUTRA, are stored in VarMeasIdleReport in descending order of sorting amount, meaning the best cells are included first, as follows:

[0153] 6> If qualityThresholdEUTRA is configured:

[0154] 7> Includes measurement results from cells whose RSRP / RSRQ measurement results are higher than the values ​​provided in qualityThresholdEUTRA, applicable to idle / inactive measurement reports;

[0155] 6> Otherwise:

[0156] 7> Includes measurement results from all cells applicable to idle / inactive measurement reports;

[0157] 2> If VarMeasIdleConfig includes measIdleCarrierListNR, and SIB1 includes idleModeMeasurementsNR:

[0158] 3> For each entry in measIdleCarrierListNR within VarMeasIdleConfig containing ssb-MeasConfig:

[0159] 4> If the UE supports carrier aggregation or NR-DC between the serving carrier and the carrier frequency and subcarrier spacing indicated by the corresponding entries in the `carrierFreq` and `ssbSubCarrierSpacing` fields:

[0160] 5> Perform measurements at the carrier frequency and subcarrier spacing indicated by the carrierFreq and ssbSubCarrierSpacing in the corresponding entries;

[0161] 5> If reportQuantities is set to rsrq:

[0162] 6> Consider RSRQ as a cell ranking parameter;

[0163] 5> Otherwise:

[0164] 6> Consider RSRP as a cell ranking parameter;

[0165] 5> If measCellListNR is included:

[0166] 6> Consider each cell identified in measCellListNR as applicable to idle / inactive measurement reports;

[0167] 5> Otherwise:

[0168] 6> Based on the sorting quantity, consider up to maxCellMeasIdle of the strongest cells identified as suitable for idle / inactive measurement reports;

[0169] 5> For all cells applicable to idle / inactive measurement reports, and for serving cells, export cell measurement results for the measurements indicated by reportQuantities;

[0170] 5> Store the derived cell measurement results for the serving cell within measResultServingCell in measReportIdleNR, as indicated by reportQuantities, in VarMeasIdleReport;

[0171] 5> The derived cell measurement results from reportQuantitiesEUTRA for cells applicable to idle / inactive measurement reports within measReportIdleEUTRA are stored in VarMeasIdleReport in descending order of cell sorting quantity, i.e., the best cells are included first, as follows:

[0172] 6> If qualityThreshold is configured:

[0173] 7> Includes measurement results from cells whose RSRP / RSRQ measurement results are higher than the value provided in qualityThreshold, applicable to idle / inactive measurement reports;

[0174] 6> Otherwise:

[0175] 7> Includes measurement results from all cells applicable to idle / inactive measurement reports;

[0176] 5> If beamMeasConfigIdle is included in the associated entry in measIdleCarrierListNR, then for each cell in the measurement results:

[0177] 6> For each measurement indicated in reportQuantityRS-IndexesNR, derive the beam measurement based on the SS / PBCH block as described in TS 38.215 [9];

[0178] 6> If reportQuantityRS-Indexes is set to rsrq:

[0179] 7> Consider RSRQ as a beam sequencing quantity;

[0180] 6> Otherwise:

[0181] 7> Consider RSRP as a beam sequencing parameter;

[0182] 6> Configure resultsSSB-Indexes to be sorted in descending order by beam sorting amount, including up to maxNrofRS-IndexesToReport SS / PBCH block indexes, as follows:

[0183] 7> Includes the index associated with the beam with the best sort size, and if absThreshSS-BlocksConsolidation is included, includes the remaining beams with sort sizes higher than absThreshSS-BlocksConsolidation.

[0184] 6> If includeBeamMeasurements is set to true:

[0185] 7> Includes beam measurement results indicated by reportQuantityRS-Indexes;

[0186] In other words, the above operation allows a UE in RRC idle mode to store early measurement results (idle / inactive measurement results) in VarMeasIdleReport, and NR measurement results (measReportIdleNR) and / or EUTRA measurement results (measReportIdleEUTRA) can be stored in VarMeasIdleReport.

[0187] In Operation 1e-30, a UE in RRC idle mode can initiate a procedure (RRC connection establishment procedure) to establish an RRC connection with NR base station 1e-02. Specifically, in Operation 1e-35, the UE can send an RRC connection establishment request message (RRCSetupRequest) to the base station.

[0188] In Operation 1e-40, the base station can send an RRC connection establishment message (RRCSetup) to the UE. Upon receiving the RRC connection establishment message, the UE can apply the RRC connection establishment message and switch to RRC connection mode (Operation 1e-41).

[0189] In Operation 1e-45, a UE in RRC connection mode can send an RRC connection establishment complete message (RRCSetupComplete) to the NR base station. The RRC connection establishment complete message may contain the following information.

[0190] -idleMeasAvailable: An indicator that early measurement results exist in RRC idle mode or RRC inactive mode.

[0191] In Operation 1e-50, the base station can send a UEInformationRequest message to the UE in RRC Connected Mode. The UEInformationRequest message may include an indicator (idleModeMeasurementReq) indicating the reporting of early measurement results measured in RRC Idle Mode or RRC Inactive Mode.

[0192] In Operation 1e-55, a UE in RRC connected mode that has received a UEInformationRequest message can respond by sending a UEInformationResponse message to the NR base station. The UEInformationResponse message can contain early measurement results measured in RRC idle mode or RRC inactive mode. Early measurement results can refer to measResultIdleEUTRA and / or measResultIdleNR.

[0193] In Operation 1e-60, the base station can send an RRC connection reconfiguration message (RRCReconfiguration) to the UE in RRC connection mode. In other words, based on the information received in Operation 1e-55, the base station can add an SCell or SCG to the UE.

[0194] In Operation 1e-65, a UE in RRC connection mode can apply the received RRC connection reconfiguration message and send an RRC connection reconfiguration complete message (RRCReconfigurationComplete) to the base station.

[0195] According to this disclosure, the UE performs early measurements when it is in RRC idle mode and stores the associated measurement values ​​in UE variables. In other words, the UE is characterized in that it does not perform early measurements after the procedure for initiating RRC connection establishment has been executed.

[0196] Figure 1f This is a flowchart illustrating the operation of a UE in RRC inactive mode (RRC_INACTIVE) storing and reporting early measurement results according to relevant technologies.

[0197] refer to Figure 1f UE 1f-01 can be in RRC connection mode (RRC_CONNECTED) by establishing an RRC connection with NR base station 1f-02 (operation 1f-05).

[0198] In operation 1f-10, UE 1f-01 in RRC connection mode can receive an RRCLease message from NR base station 1f-02. This message may contain suspend configuration information (suspendConfig) and measIdleConfig containing early measurement configuration (idle / inactive measurement configuration). measConfig may contain at least one of the following information.

[0199] -measIdleCarrierListNR: A list of NR carriers for which early measurements (idle / inactive measurements) are performed in RRC idle mode or RRC inactive mode (RRC_INACTIVE). Each NR carrier may contain at least one of the following information.

[0200]

[0201] -measIdleCarrierListEUTRA: A list of E-UTRA carriers for which measurements are performed in RRC idle mode. Each E-UTRA carrier may contain at least one of the following information.

[0202]

[0203] -measIdleDuration: The duration value (T331 timer value) for performing early measurements in RRC idle mode or RRC inactive mode.

[0204] -validityAreaList: A list of frequencies for which the UE is requested to perform early measurements in RRC idle mode or RRC inactive mode and / or a list of cells for each frequency.

[0205] A UE in RRC connection mode can apply the measIdleConfig contained in the RRCRelease message. For example, when configured to establish measIdleConfig,

[0206] The UE can store the received measIdleDuration in VarMeasIdleConfig. Additionally, the UE can drive the T331 timer based on the measIdleDuration value.

[0207] - If measIdleConfig contains measIdleCarrierListNR, the UE can store the received measIdleCarrierListNR in VarMeasIdleConfig.

[0208] - If measIdleConfig contains measIdleCarrierListEUTRA, the UE can store the received measIdleCarrierListEUTRA in VarMeasIdleConfig.

[0209] - If measIdleConfig contains validityAreaList, the UE can store the received validityAreaList in VarMeasIdleConfig.

[0210] In Operation 1f-15, a UE in RRC connected mode can switch to RRC inactive mode (RRC_INACTIVE).

[0211] In Operation 1f-20, a UE in RRC inactive mode can obtain system information to camp on the appropriate NR cell 1f-02. Furthermore, the UE can obtain or update its idle / inactive measurement configuration (measIdleConfigSIB) via system information broadcast by the cell. Additionally, the system information may include indicators (idleModeMeasurementNR, which indicates that a UE configured for NR idle / inactive measurements should perform measurements while camped in that cell and report the availability of those measurements when establishing or restoring a connection to the appropriate cell) indicating whether the UE needs to perform idle / inactive measurements and instructing the UE to report the availability of those measurements when establishing or restoring a connection in that cell.

[0212] In Operation 1f-25, a UE in RRC inactive mode can perform idle / inactive measurements. Specifically, a UE in RRC inactive mode can perform idle / inactive measurements while the T331 timer is running, and the specific UE operation is as follows.

[0213] 1> Perform the measurement according to the following requirements:

[0214] 2> If VarMeasIdleConfig includes measIdleCarrierListEUTRA, and SIB1 includes idleModeMeasurementsEUTRA:

[0215] 3> For each entry in measIdleCarrierListEUTRA within VarMeasIdleConfig:

[0216] 4> If the UE supports NE-DC between the serving carrier and the carrier frequency indicated by the carrierFreqEUTRA in the corresponding entry:

[0217] 5> Perform measurements at the carrier frequency and bandwidth indicated by the carrierFreq and allowedMeasBandwidth in the corresponding entries;

[0218] 5> If reportQuantitiesEUTRA is set to rsrq:

[0219] 6> Consider RSRQ as a sorting parameter;

[0220] 5> Otherwise:

[0221] 6> Consider RSRP as a sorting metric;

[0222] 5> If measCellListEUTRA is included:

[0223] 6> Consider the cells identified by each entry in measCellListEUTRA for measurement reports applicable to idle / inactive modes;

[0224] 5> Otherwise:

[0225] 6> Based on the sorting quantity, consider up to maxCellMeasIdle of the strongest cells identified as suitable for idle / inactive measurement reports;

[0226] 5> For all cells applicable to idle / inactive measurement reports, export the measurement results for the quantities indicated by reportQuantitiesEUTRA;

[0227] 5> The derived measurement results, as indicated by reportQuantitiesEUTRA within measReportIdleEUTRA, are stored in VarMeasIdleReport in descending order of sorting amount, meaning the best cells are included first, as follows:

[0228] 6> If qualityThresholdEUTRA is configured:

[0229] 7> Includes measurement results from cells whose RSRP / RSRQ measurement results are higher than the values ​​provided in qualityThresholdEUTRA, applicable to idle / inactive measurement reports;

[0230] 6> Otherwise:

[0231] 7> Includes measurement results from all cells applicable to idle / inactive measurement reports;

[0232] 2> If VarMeasIdleConfig includes measIdleCarrierListNR, and SIB1 includes idleModeMeasurementsNR:

[0233] 3> For each entry in measIdleCarrierListNR within VarMeasIdleConfig containing ssb-MeasConfig:

[0234] 4> If the UE supports carrier aggregation or NR-DC between the serving carrier and the carrier frequency and subcarrier spacing indicated by the corresponding entries in the `carrierFreq` and `ssbSubCarrierSpacing` fields:

[0235] 5> Perform measurements at the carrier frequency and subcarrier spacing indicated by the carrierFreq and ssbSubCarrierSpacing in the corresponding entries;

[0236] 5> If reportQuantities is set to rsrq:

[0237] 6> Consider RSRQ as a cell ranking parameter;

[0238] 5> Otherwise:

[0239] 6> Consider RSRP as a cell ranking parameter;

[0240] 5> If measCellListNR is included:

[0241] 6> Consider each cell identified in measCellListNR as applicable to idle / inactive measurement reports;

[0242] 5> Otherwise:

[0243] 6> Based on the sorting quantity, consider up to maxCellMeasIdle of the strongest cells identified as suitable for idle / inactive measurement reports;

[0244] 5> For all cells applicable to idle / inactive measurement reports, and for serving cells, export cell measurement results for the measurements indicated by reportQuantities;

[0245] 5> Store the derived cell measurement results for the serving cell within measResultServingCell in measReportIdleNR, as indicated by reportQuantities, in VarMeasIdleReport;

[0246] 5> The derived cell measurement results from reportQuantitiesEUTRA for cells applicable to idle / inactive measurement reports within measReportIdleEUTRA are stored in VarMeasIdleReport in descending order of cell sorting quantity, i.e., the best cells are included first, as follows:

[0247] 6> If qualityThreshold is configured:

[0248] 7> Includes measurement results from cells whose RSRP / RSRQ measurement results are higher than the value provided in qualityThreshold, applicable to idle / inactive measurement reports;

[0249] 6> Otherwise:

[0250] 7> Includes measurement results from all cells applicable to idle / inactive measurement reports;

[0251] 5> If beamMeasConfigIdle is included in the associated entry in measIdleCarrierListNR, then for each cell in the measurement results:

[0252] 6> For each measurement indicated in reportQuantityRS-IndexesNR, derive the beam measurement based on the SS / PBCH block as described in TS 38.215 [9];

[0253] 6> If reportQuantityRS-Indexes is set to rsrq:

[0254] 7> Consider RSRQ as a beam sequencing quantity;

[0255] 6> Otherwise:

[0256] 7> Consider RSRP as a beam sequencing parameter;

[0257] 6> Configure resultsSSB-Indexes to be sorted in descending order by beam sorting amount, including up to maxNrofRS-IndexesToReport SS / PBCH block indexes, as follows:

[0258] 7> Includes the index associated with the beam with the best sort size, and if absThreshSS-BlocksConsolidation is included, includes the remaining beams with sort sizes higher than absThreshSS-BlocksConsolidation.

[0259] 6> If includeBeamMeasurements is set to true:

[0260] 7> Includes beam measurement results indicated by reportQuantityRS-Indexes;

[0261] In other words, the above operation allows a UE in RRC inactive mode to store early measurement results (idle / inactive measurement results) in VarMeasIdleReport, and NR measurement results (measReportIdleNR) and / or EUTRA measurement results (measReportIdleEUTRA) can be stored in VarMeasIdleReport.

[0262] In Operation 1f-30, a UE in RRC inactive mode can initiate a procedure (RRC connection restoration procedure) to restore the RRC connection with NR base station 1f-02. Specifically, in Operation 1f-35, the UE can send an RRC connection restoration request message (RRCResumeRequest or RCResumeRequest1) to the base station.

[0263] In Operation 1f-40, the base station can send an RRC connection restoration message (RRCResume) to the UE. The RRC connection restoration message may include an indicator (idleModeMeasurementReq) that indicates the reporting of early measurement results measured in RRC idle mode or RRC inactive mode. Upon receiving the RRC restoration establishment message, the UE can apply the RRC restoration establishment message and switch to RRC connection mode (Operation 1f-41).

[0264] In Operation 1f-45, a UE in RRC connection mode can send an RRC recovery complete message (RRCResumeComplete) to the NR base station. The RRC connection recovery complete message may include at least one of the following information.

[0265] - The RRC connection recovery completion message can include early measurement results measured in RRC idle mode or RRC inactive mode. Early measurement results can refer to measResultIdleEUTRA and / or measResultIdleNR.

[0266] - In the absence of the idleModeMeasurementReq indicator, when there are early measurement results measured in RRC idle mode or RRC inactive mode, the RRC connection recovery message may include the idleMeasAvailable indicator. In this case, the base station can retrieve the early measurement results from the UE according to the above embodiments.

[0267] In Operation 1f-50, the base station can send an RRC connection reconfiguration message (RRCReconfiguration) to the UE in RRC connection mode. In other words, based on the information received in Operation 1f-45, the base station can add an SCell or SCG to the UE.

[0268] In Operation 1f-55, a UE in RRC connection mode can apply the received RRC connection reconfiguration message and send an RRC connection reconfiguration complete message (RRCReconfigurationComplete) to the base station.

[0269] According to this disclosure, the UE performs early measurements when it is in RRC inactive mode and stores the associated measurement values ​​in UE variables. In other words, once the procedure for initiating the restoration of the RRC connection is executed, early measurements are no longer performed.

[0270] Figure 1g This is a flowchart illustrating the operation of a base station enabling a UE to perform enhanced early measurement results in a next-generation mobile communication system according to embodiments of the present disclosure.

[0271] refer to Figure 1g UE 1g-01 can be in RRC connection mode (RRC_CONNECTED) by establishing an RRC connection with NR base station 1g-02 (operation 1g-05).

[0272] In Operation 1g-10, the UE can send a UE Capability Information message to the base station. This operation can follow the embodiments described above. Furthermore, this message may include at least one of the following information.

[0273] - The UE capability information message may include capability information that enables early measurements to be performed during or even after the execution of the RRC connection establishment or RRC recovery procedure, storing the associated early measurement results, and reporting them to the base station. In this disclosure, the execution (performance) of early measurements during or even after the execution of the RRC connection establishment or RRC recovery procedure may be referred to as enhanced early measurement.

[0274] ■According to this disclosure, enhanced early measurements can be performed only in frequency range 2 (FR 2). Of course, enhanced early measurements can be supported regardless of FR.

[0275] - This message may include information about whether the enhanced early measurement capabilities support the capability to create new validity areas.

[0276] ■ A new effective area can refer to information about the area where enhanced early measurements should be performed. For example, a new effective area may refer to the following information.

[0277] ◆ Indicates the frequency information of FR2 (e.g., Absolute Radio Channel Number (ARFCN)).

[0278] ◆List of available cells for each frequency mentioned above

[0279] ●If a list of cells for the corresponding frequency exists, this can indicate that enhanced early measurements should be performed on all cells in the indicated frequency.

[0280] ●If a cell list for the corresponding frequency exists, this can indicate that enhanced early measurements should only be performed for the cell list configured in the indicated frequency.

[0281] In operation 1g-15, UE 1g-01 in RRC connection mode can receive an RRCRelease message from NR base station 1g-02. This operation can follow the embodiments described above. Furthermore, the message may include the enhanced early measurement configuration described above, which may refer to configuration information including at least one of the following.

[0282] -Information regarding the frequency at which enhanced early measurements should be performed

[0283] ■ Frequency information may include only frequency information for FR2, or it may include all frequency information regardless of FR. This information may be included in an RRC disconnect message separate from the earlier measurement configuration (idle / inactive measurement configuration) described above.

[0284] -Information regarding the new validation area where enhanced early measurements should be performed.

[0285] ■ Frequency information may include information about the areas where the UE should perform enhanced early measurements, and can be specifically configured as follows.

[0286] ◆ Indicates the frequency information of FR2 (e.g., Absolute Radio Channel Number (ARFCN)).

[0287] ●Of course, any frequency information can be included, regardless of the FR.

[0288] ◆List of available cells for each frequency mentioned above

[0289] ● In the absence of a list of cells for the corresponding frequency, this can indicate that enhanced early measurements should be performed on all cells in the indicated frequency.

[0290] ●If a cell list exists in the corresponding frequency, this can indicate that enhanced early measurements should only be performed for the cell list configured in the indicated frequency.

[0291] When configuring enhanced early measurement via RRC disconnect message, the base station according to this disclosure can configure new effective area information for the UE. Because not all cells in a specific frequency support enhanced early measurement, and there may be cells in the UE that the base station has not quickly established SCells or SCGs operating in that specific frequency, the advantage is that by configuring new effective area information, the UE may not unnecessarily need to perform enhanced early measurement, and the base station may not need to receive enhanced early measurement results from the UE.

[0292] Figure 1h This is a flowchart illustrating operation according to an embodiment of the present disclosure, wherein a UE configured to perform enhanced early measurements in a next-generation mobile communication system sends an indicator to a base station indicating the presence or absence of a result value of the measurement, or an indicator or information indicating that the measurement should continue.

[0293] refer to Figure 1h UE 1h-01 can be in RRC connection mode (RRC_CONNECTED) by establishing an RRC connection with NR base station 1h-02.

[0294] During operation 1h-10, the UE can send a UE Capability Information message to the base station. This operation can follow the above-described embodiments.

[0295] During operation 1h-15, UE 1h-01 in RRC connection mode can receive RRCRelease messages from NR base station 1h-02. This operation can follow the above-described embodiment.

[0296] During operation 1h-20, the UE can apply the received RRC Release message and switch to RRC Idle mode (RRC_IDLE) or RRC Inactive mode (RRC_INACTIVE).

[0297] During operation 1h-25, the UE can obtain system information currently broadcast by the serving cell. The system information may include at least one of the following.

[0298] - The indicator (enhancedidleModeMeasurementsNR) indicates whether the UE needs to perform enhanced early measurements and instructs the UE to report the enhanced early measurements performed when establishing or restoring an RRC connection to the corresponding cell.

[0299] - The UE can perform frequency information enhancement for early measurements (enhancedmeasIdleConfigSIB).

[0300] During operation 1h-30, the UE can perform enhanced early measurements. For reference, this operation can be performed independently of the T331 timer, and the specific operation can follow the above-described embodiments. Furthermore, if the UE fails to derive a valid result value, the measurement execution can continue during or after the RRC connection establishment or RRC recovery procedure.

[0301] During operation 1h-35, the UE can initiate an RRC connection establishment or RRC connection restoration procedure to establish or restore an RRC connection with base station 1h-02. Conversely, if the UE fails to derive a valid result value for the frequency / cell instructing the UE to perform enhanced early measurements, the UE can continue to perform enhanced early measurements. The RRC connection establishment or RRC connection restoration procedure can follow the above embodiments, and this document only describes the differences from the above embodiments.

[0302] During operation 1h-40, UE 1h-01, which has been switched to RRC connection mode, can send an RRC connection establishment complete message (RRCSetupComplete) or an RRC connection recovery complete message (RRCResumeComplete) to base station 1h-02. In this disclosure, the message includes at least one of the following.

[0303] - If the UE has a valid result value obtained by performing enhanced early measurements on one or more frequencies / cells, an indicator indicating that the UE has a valid result value (enhancedidleMeasAvailable) can be included in the message.

[0304] - When the UE continues to perform enhanced early measurements on one or more frequencies / cells (i.e., performing further measurements because no valid result value is derived), an indicator indicating that enhanced early measurements are continuing can be included in the message.

[0305] ■The UE may send cell information or in-frequency cell information related to the cell for which enhanced early measurements are expected to continue, along with an indicator. For reference, this information may be limited to RRC connection restoration completion messages where no security issues exist.

[0306] In operation 1h-45, base station 1h-02 can send a UEInformationRequest message to UE 1h-01 in RRC connection mode. The UEInformationRequest message may include an indicator (enhancedidleModeMeasurementReq) indicating the reporting of enhanced early measurement results.

[0307] During operation 1h-50, a UE that has received a UEInformationRequest message may, in response, send a UEInformationResponse message to the base station. This message may include information about the enhanced measurement results obtained via at least one of the following methods (i.e., any combination of the following methods may be performed, or only one of the following methods may be performed).

[0308] Method 1: If a valid enhanced early measurement result (enhancedMeasResultIdEnr) exists, the enhanced early measurement result can be included in the message. In this case, even if only one valid result value exists, that value can be included in the message. Alternatively, the message can include all valid result values ​​after all results have been exported.

[0309] Method 2: When the UE continues to perform enhanced early measurements on one or more frequencies or cells, an indicator indicating that enhanced early measurements are continuing (enhancedidleMeasOngoing) can be included in the message. The absence of the indicator may mean that the UE is no longer performing enhanced early measurements, or it may mean that all valid enhanced early measurement results are included in the message.

[0310] - Method 3: When the UE continues to perform enhanced early measurements on one or more frequencies or cells, the timing information used to perform the measurements can be included in the message.

[0311] - Method 4: When the UE continues to perform enhanced early measurements on one or more frequencies or cells, information about those frequencies or cells is included in the message.

[0312] Once the UE has successfully transmitted the enhanced early measurement results by including information about the enhanced early measurement results in the message, the UE can release the information about the enhanced early measurement results. The UE can release only the enhanced early measurement results sent to the base station, or it can release all stored enhanced early measurement results and stop performing enhanced early measurements after operation 1h-50.

[0313] During operation 1h-55, the base station can send an RRC message (e.g., an RRC connection reconfiguration message (RRCReconfiguration)) to the UE in RRC connection mode. Operation 1h-55 can be performed before operation 1h-45. In this disclosure, enhanced early measurement can be stopped and information about enhanced early measurement can be released upon receiving a first RRC connection reconstruction message, or after receiving a UEInformationRequest message containing enhancedidleModeMeasurementReq, or when a predetermined RRC message explicitly includes an indicator to stop performing enhanced early measurement.

[0314] Figure 1i The internal structure of a UE according to an embodiment of the present disclosure is shown.

[0315] refer to Figure 1i The UE includes a radio frequency (RF) processor 1i-10, a baseband processor 1i-20, a storage device 1i-30, and a controller 1i-40.

[0316] The RF processor 1i-10 performs functions for transmitting and receiving signals via a wireless channel, such as frequency band conversion and signal amplification. In other words, the RF processor 1i-10 up-converts the baseband signal provided by the baseband processor 1i-20 into an RF band signal and transmits it via an antenna, and down-converts the RF band signal received via the antenna back into a baseband signal. For example, the RF processor 1i-10 includes a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. Figure 1iOnly one antenna is shown in the diagram, but the UE may include multiple antennas. Furthermore, the RF processor 1i-10 may include multiple RF chains. Additionally, the RF processor 1i-10 can perform beamforming. For beamforming, the RF processor 1i-10 can adjust the phase and amplitude of each signal transmitted and received through multiple antennas or antenna elements. Furthermore, the RF processor can perform MIMO and can receive multiple layers while performing MIMO operation.

[0317] The baseband processor 1i-20 performs conversion functions between baseband signals and bit strings according to the system's physical layer specifications. For example, when transmitting data, the baseband processor 1i-20 encodes and modulates the transmitted bit stream to generate complex symbols. Furthermore, when receiving data, the baseband processor 1i-20 demodulates and decodes the baseband signal provided from the RF processor 1i-10 to recover the received bit stream. For example, in the case of an Orthogonal Frequency Division Multiplexing (OFDM) scheme, when transmitting data, the baseband processor 1i-20 generates complex symbols by encoding and modulating the transmitted bit stream, maps the complex symbols to subcarriers, and then configures the OFDM symbols by performing an Inverse Fast Fourier Transform (IFFT) operation and inserting a cyclic prefix (CP). In addition, when receiving data, the baseband processor 1i-20 can divide the baseband signal provided by the RF processor 1i-10 into OFDM symbol units, recover the signal mapped to the subcarrier by performing a Fast Fourier Transform (FFT) operation, and then reconstruct the received bit stream by performing demodulation and decoding.

[0318] As described above, the baseband processor 1i-20 and the RF processor 1i-10 can transmit and receive signals. Therefore, the baseband processor 1i-20 and the RF processor 1i-10 can be referred to as a transmitter, receiver, transceiver, or communicator. At least one of the baseband processor 1i-20 and the RF processor 1i-10 may include multiple communication modules to support different wireless access technologies. Furthermore, at least one of the baseband processor 1i-20 and the RF processor 1i-10 may include different communication modules configured to process signals in different frequency bands. For example, different wireless access technologies include wireless LAN (e.g., IEEE 802.11), cellular networks (e.g., LTE), etc. Additionally, different frequency bands may include ultra-high frequency (SHF) bands (e.g., 2.NRHz or NRHz) and millimeter wave (e.g., 60GHz) bands.

[0319] Storage 1i-30 can store data such as basic programs, application programs, and configuration information for UE operation. Specifically, storage 1i-30 can store information related to a second access node performing wireless communication using a second wireless access technology. Storage 1i-30 can provide the stored data upon request from controller 1i-40.

[0320] The controller 1i-40 can control the overall operation of the UE. For example, the controller 1i-40 transmits and receives signals via the baseband processor 1i-20 and the RF processor 1i-10. Furthermore, the controller 1i-40 can record and retrieve data from the storage device 1i-30. For this purpose, the controller 1i-40 may include at least one processor. For example, the controller 1i-40 includes a communication processor (CP) 1i-42 that performs control for communication and an application processor (AP) that controls higher-level functions such as applications.

[0321] Figure 1j This is a block diagram illustrating the configuration of an NR base station according to an embodiment of the present disclosure.

[0322] refer to Figure 1j The base station includes an RF processor 1j-10, a baseband processor 1j-20, a backhaul communicator 1j-30, a storage device 1j-40, and a controller 1j-50.

[0323] The RF processor 1j-10 performs functions for transmitting and receiving signals via a wireless channel, such as frequency band conversion and signal amplification. In other words, the RF processor 1j-10 up-converts the baseband signal provided by the baseband processor 1j-20 into an RF band signal and transmits it via an antenna, and down-converts the RF band signal received via the antenna back into a baseband signal. For example, the RF processor 1j-10 includes a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. Figure 1j Only one antenna is shown in the diagram, but the first access node may include multiple antennas. Furthermore, the RF processor 1j-10 may include multiple RF chains. Additionally, the RF processor 1j-10 can perform beamforming. For beamforming, the RF processor 1j-10 can adjust the phase and amplitude of each signal transmitted and received through multiple antennas or antenna elements. The RF processor can perform down-MIMO operation by transmitting one or more layers.

[0324] The baseband processor 1j-20 performs the conversion function between baseband signals and bit strings according to the physical layer specification of the first radio access technology. For example, when transmitting data, the baseband processor 1j-20 encodes and modulates the transmitted bit stream to generate complex symbols. Furthermore, when receiving data, the baseband processor 1j-20 demodulates and decodes the baseband signal provided from the RF processor 1j-10 to recover the received bit stream. For example, in the case of an OFDM scheme, when transmitting data, the baseband processor 1j-20 generates complex symbols by encoding and modulating the transmitted bit stream, maps the complex symbols to subcarriers, and then configures the OFDM symbols by performing an IFFT operation and inserting CP. Furthermore, when receiving data, the baseband processor 1j-20 can divide the baseband signal provided from the RF processor 1j-10 into OFDM symbol units, recover the signal mapped to the subcarriers by performing an FFT operation, and then reconstruct the received bit stream by performing demodulation and decoding. As described above, the baseband processor 1j-20 and the RF processor 1j-10 can transmit and receive signals. Therefore, the baseband processor 1j-20 and the RF processor 1j-10 can be referred to as a transmitter, a receiver, a transceiver, a communicator, or a wireless communicator.

[0325] The backhaul communicator 1j-30 provides an interface for performing communication with other nodes in the network. In other words, the backhaul communicator 1j-30 converts the bit stream sent from the primary base station to another node (e.g., a secondary base station, the core network, etc.) into a physical signal, and converts the physical signal received from another node into a bit stream.

[0326] Storage 1j-40 can store data such as basic programs, application programs, and configuration information for the operation of the main base station. Specifically, storage 1j-40 can store information about bearers assigned to accessing UEs, measurement results reported by accessing UEs, etc. Additionally, storage 1j-40 can store information that serves as the basis for determining whether to provide or terminate multiple connections to the UE. Furthermore, storage 1j-40 provides the stored data according to requests from controller 1j-50.

[0327] The controller 1j-50 can control the overall operation of the main base station. For example, the controller 1j-50 can send and receive signals via the baseband processor 1j-20 and the RF processor 1j-10 or via the backhaul communicator 1j-30. Furthermore, the controller 1j-50 can record and retrieve data from the storage device 1j-40. For this purpose, the controller 1j-50 may include at least one processor 1j-52.

[0328] While this disclosure has been shown and described with reference to various embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Receive a Radio Resource Control (RRC) release message from the base station, which includes measurement configuration information; Based on the RRC release message, it enters the RRC idle state or the RRC inactive state; The system information received from the base station includes information indicating whether the terminal performs measurements while camped on the cell and reports measurement availability when a connection is established or restored in the cell; Measurements are performed based on measurement configuration information when the RRC is idle or inactive. Execute the RRC connection procedure with the base station; Receive a User Equipment (UE) Information Request message from the base station, which includes a request for verified measurements; and Send a response message to the base station containing verified UE information.

2. The method according to claim 1, further comprising: If the UE information response message is successfully sent, the measurement results are discarded.

3. The method according to claim 1, in, The execution of the RRC connection procedure also includes sending an RRC establishment complete message or an RRC recovery complete message, and The RRC establishment completion message or the RRC recovery completion message includes information indicating that the terminal has available measurement results.

4. The method according to claim 1, wherein, The measurement configuration information includes at least one of the following: a carrier list associated with New Radio (NR), a carrier list associated with Long Term Evolution (LTE), duration information, and a frequency list.

5. A method performed by a base station in a wireless communication system, the method comprising: Send a Radio Resource Control (RRC) release message to the terminal, including measurement configuration information; Based on the RRC release message, system information is sent to terminals in the RRC idle state or RRC inactive state. The system information includes information indicating whether to perform measurements while the terminal is camped on the cell and to report measurement availability when a connection is established or restored in the cell. Execute the RRC connection procedure with the terminal; Sends a User Equipment (UE) Information Request message to the terminal, including a request for verified measurements; and Receive a response message from the terminal that includes verified measurement UE information.

6. The method according to claim 5, in, The execution of the RRC connection procedure also includes receiving an RRC establishment complete message or an RRC recovery complete message, and The RRC establishment completion message or the RRC recovery completion message includes information indicating that the terminal has available measurement results.

7. The method according to claim 5, wherein, The measurement configuration information includes at least one of the following: a carrier list associated with New Radio (NR), a carrier list associated with Long Term Evolution (LTE), duration information, and a frequency list.

8. A terminal in a wireless communication system, the terminal comprising: transceiver; and The controller, which is connected to the transceiver, The controller is configured as follows: Receive a Radio Resource Control (RRC) release message from the base station, which includes measurement configuration information. Based on the RRC release message, it enters the RRC idle state or the RRC inactive state. The system information received from the base station includes information indicating whether the terminal performs measurements while camped on the cell and reporting measurement availability when a connection is established or restored in the cell. Measurements are performed based on measurement configuration information when the RRC is idle or inactive. Execute the RRC connection procedure with the base station. Receives a User Equipment (UE) Information Request message from the base station, including a request for verified measurements, and Send a response message to the base station containing verified UE information.

9. The terminal according to claim 8, wherein, The controller is also configured to discard the measurement results if the UE information response message is successfully sent.

10. The terminal according to claim 8, in, The controller is also configured to send an RRC establishment complete message or an RRC recovery complete message, and The RRC establishment completion message or the RRC recovery completion message includes information indicating that the terminal has available measurement results.

11. The terminal according to claim 8, wherein, The measurement configuration information includes at least one of the following: a carrier list associated with New Radio (NR), a carrier list associated with Long Term Evolution (LTE), duration information, and a frequency list.

12. A base station in a wireless communication system, the base station comprising: transceiver; and The controller, which is connected to the transceiver, The controller is configured as follows: Send a Radio Resource Control (RRC) release message, including measurement configuration information, to the terminal. Based on the RRC release message, system information is sent to terminals in the RRC idle state or RRC inactive state. The system information includes information indicating whether to perform measurements while the terminal is camped on the cell and to report measurement availability when a connection is established or restored in the cell. Execute the RRC connection procedure with the terminal. Send a User Equipment (UE) Information Request message to the terminal, including a request for verified measurements, and Receive a response message from the terminal that includes verified measurement UE information.

13. The base station according to claim 12, in, The controller is configured to receive an RRC establishment complete message or an RRC recovery complete message, and The RRC establishment completion message or the RRC recovery completion message includes information indicating that the terminal has available measurement results.

14. The base station according to claim 12, wherein, The measurement configuration information includes at least one of the following: a carrier list associated with New Radio (NR), a carrier list associated with Long Term Evolution (LTE), duration information, and a frequency list.

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