Method and apparatus for cell reselection based on stored configuration

Abstract

A method and apparatus for cell reselection based on stored configuration are provided. A wireless device receives a conditional mobility configuration including information for an execution condition related to a target cell. The wireless device enters an RRC_IDLE state or an RRC_INACTIVE state. The wireless device evaluates whether the execution condition related to the target cell is satisfied. The wireless device reselects the target cell based on the execution condition being satisfied.

Description

Technical Field

[0001] This disclosure relates to a method and apparatus for cell reselection based on stored configurations. Background Technology

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology that enables high-speed packet communication. Many proposals have been put forward for LTE objectives, including those aimed at reducing costs for users and vendors, improving quality of service, and expanding and improving coverage and system capacity. As upper-layer requirements, 3GPP LTE needs to reduce cost per bit, increase service availability, allow flexible use of frequency bands, have a simple architecture, open interfaces, and appropriate power consumption for terminals.

[0003] The International Telecommunication Union (ITU) and 3GPP have begun developing requirements and specifications for New Radio (NR) systems. 3GPP must identify and develop the technical components necessary for the successful standardization of the new RAT (Radio Access Technology) to meet both urgent market demands and the longer-term requirements outlined in the ITU Radiocommunication Sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process. Furthermore, NR should be able to utilize any spectrum band, at least up to 100 GHz, that can be used for wireless communication even in the more distant future.

[0004] The goal of NR is a single technology framework that addresses all use cases, requirements, and deployment scenarios, including enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), ultra-reliable and low-latency communications (URLLC), and more. NR should be inherently backward compatible. Summary of the Invention

[0005] Technical issues

[0006] Under RRC_IDLE / INACTIVE, the UE autonomously selects the target cell to camp on based on the measurement results. The network can control the mobility of the UE under RRC_IDLE / INACTIVE through system information settings and transmission frequency priority, but it cannot be configured individually for each UE.

[0007] Although frequency priority can be provided via dedicated signaling, the frequency priority is also limited by the fact that it cannot be updated when the UE is in RRC_IDLE / INACTIVE.

[0008] Therefore, it is necessary to study cell reselection based on the stored configuration.

[0009] Solution to the problem

[0010] In one aspect, a method is provided. The method includes: receiving, by a wireless device, a conditional mobility configuration from a network including information regarding execution conditions associated with a target cell; entering a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state by the wireless device; evaluating, by the wireless device, whether the execution conditions associated with the target cell are met; and reselecting the target cell by the wireless device based on the satisfaction of the execution conditions.

[0011] In another aspect, an apparatus for implementing the above method is provided.

[0012] Beneficial effects of the invention

[0013] This disclosure can have various beneficial effects.

[0014] According to some embodiments of this disclosure, a wireless device can efficiently perform cell reselection based on stored configurations.

[0015] For example, the network can enhance its ability to control the mobility of wireless devices under RRC_IDLE / INACTIVE and can more actively enable wireless devices to switch to RRC_INACTIVE.

[0016] For example, a wireless device can move to and reside in a cell suitable for the ongoing session that the wireless device has or a cell suitable for the capabilities of the UE.

[0017] For example, by using the CHO setting to perform cell reselection, wireless devices can efficiently perform mobility in inactive or idle states.

[0018] According to some embodiments of this disclosure, a wireless communication system can provide an efficient solution for cell reselection based on stored configurations.

[0019] The beneficial effects that can be obtained through specific embodiments of this disclosure are not limited to those listed above. For example, various technical effects may exist that can be understood and / or derived by those skilled in the art based on this disclosure. Therefore, the specific effects of this disclosure are not limited to those explicitly described herein, but may include various effects that can be understood or derived from the technical features of this disclosure. Attached Figure Description

[0020] Figure 1 An example of a communication system that applies the implementation of this disclosure is shown.

[0021] Figure 2 An example of a wireless device that applies the implementation of this disclosure is shown.

[0022] Figure 3 An example of a wireless device that applies the implementation of this disclosure is shown.

[0023] Figure 4 Another example of a wireless device that applies the implementation of this disclosure is shown.

[0024] Figure 5 An example of a UE that applies the implementation of this disclosure is shown.

[0025] Figure 6 and Figure 7 An example of a protocol stack in a 3GPP-based wireless communication system applying the implementation of this disclosure is shown.

[0026] Figure 8 The frame structure in a 3GPP-based wireless communication system applying the implementation of this disclosure is shown.

[0027] Figure 9 An example of a data flow in a 3GPP NR system applying the implementation of this disclosure is shown.

[0028] Figure 10 Examples of methods for cell reselection based on stored configurations, according to some embodiments of the present disclosure, are shown.

[0029] Figure 11 An example of cell reselection based on pre-configured conditions is shown.

[0030] Figure 12 An example of cell reselection based on pre-configured conditions is shown. Detailed Implementation

[0031] The following technologies, devices, and systems can be applied to a variety of wireless multiple access systems. Examples of multiple access systems include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Multi-Carrier Frequency Division Multiple Access (MC-FDMA) systems. CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM), Universal Packet Radio Service (GPRS), or Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in DL and SC-FDMA in UL. LTE-Advanced (LTE-A) is an evolution of 3GPP LTE.

[0032] For ease of description, the implementation of this disclosure is primarily described with respect to 3GPP-based wireless communication systems. However, the technical features of this disclosure are not limited thereto. For example, although the following detailed description is based on a mobile communication system corresponding to a 3GPP-based wireless communication system, the aspects of this disclosure that are not limited to 3GPP-based wireless communication systems are applicable to other mobile communication systems.

[0033] For terms and techniques used in this disclosure that are not specifically described in this disclosure, please refer to wireless communication standards documents published prior to this disclosure.

[0034] In this disclosure, "A or B" may mean "A only", "B only", or "both A and B". In other words, in this disclosure, "A or B" can be interpreted as "A and / or B". For example, in this disclosure, "A, B or C" may mean "A only", "B only", "C only", or "any combination of A, B and C".

[0035] In this disclosure, a forward slash ( / ) or a comma (,) can mean "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0036] In this disclosure, "at least one of A and B" can mean "only A", "only B" or "both A and B". Furthermore, the expressions "at least one of A or B" or "at least one of A and / or B" in this disclosure can be interpreted as the same as "at least one of A and B".

[0037] Additionally, in this disclosure, "at least one of A, B, and C" may mean "A only", "B only", "C only" or "any combination of A, B, and C". Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0038] Additionally, the brackets used in this disclosure may mean "for example". Specifically, when shown as "Control Information (PDCCH)", "PDCCH" can be cited as an example of "Control Information". In other words, "Control Information" in this disclosure is not limited to "PDCCH", and "PDCCH" can be cited as an example of "Control Information". Furthermore, even when shown as "Control Information (i.e., PDCCH)", "PDCCH" can be cited as an example of "Control Information".

[0039] The technical features described individually in a single figure in this disclosure can be implemented individually or simultaneously.

[0040] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods and / or operation flowcharts disclosed herein can be applied to various fields requiring wireless communication and / or connectivity between devices (e.g., 5G).

[0041] In the following description, this disclosure will be described in more detail with reference to the accompanying drawings. Unless otherwise stated, the same reference numerals in the following drawings and / or description may refer to the same and / or corresponding hardware blocks, software blocks and / or functional blocks.

[0042] Figure 1 An example of a communication system that applies the implementation of this disclosure is shown.

[0043] exist Figure 1 The 5G use cases shown are merely exemplary, and the technical features of this disclosure can be applied to scenarios not described herein. Figure 1 Other 5G use cases are shown in the diagram.

[0044] The three main demand categories for 5G include: (1) enhanced mobile broadband (eMBB), (2) massive machine-type communications (mMTC), and (3) ultra-reliable and low-latency communications (URLLC).

[0045] Some use cases may require multiple categories for optimization, while others can focus on just one key performance indicator (KPI). 5G supports such a wide variety of use cases using flexible and reliable methods.

[0046] eMBB goes far beyond basic mobile internet access and covers a wealth of two-way work, media, and entertainment applications in the cloud and augmented reality. Data is one of the core driving forces of 5G, and for the first time in the 5G era, dedicated voice services may not be provided. In 5G, voice is expected to be simply processed as an application using the data connection provided by the communication system. The main reason for the increased service capacity is the increase in content size and the increase in the number of applications requiring high data transmission rates. As more and more devices connect to the internet, streaming services (audio and video), conversational video, and mobile internet access will be used more widely. These many applications require always-on connectivity to push real-time information and alerts to users. Cloud storage and applications are rapidly increasing in mobile communication platforms and can be applied to both work and entertainment. Cloud storage is a special use case for accelerating the growth of uplink data transmission rates. 5G is also used for remote work in the cloud. When using haptic interfaces, 5G requires much lower end-to-end latency to maintain a good user experience. Entertainment, such as cloud gaming and video streaming, is another core element increasing the demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including in highly mobile environments such as trains, vehicles, and airplanes. Other use cases include augmented reality for entertainment and information retrieval. In this case, augmented reality requires very low latency and instantaneous data capacity.

[0047] Additionally, one of the most anticipated 5G use cases involves the ability to seamlessly connect embedded sensors across all sectors, namely mMTC. The number of potential Internet of Things (IoT) devices is expected to reach 204 billion by 2020. Industrial IoT is one of the key categories performing key roles in enabling smart cities, asset tracking, smart utilities, agriculture, and security infrastructure through 5G.

[0048] URLLC encompasses new services that will transform industry, such as autonomous vehicles, through remote control of the main infrastructure and ultra-reliable / available low-latency links. Levels of reliability and latency are essential for controlling smart grids, automating industry, enabling robotics, and controlling and adapting drones.

[0049] 5G is the means to deliver streams assessed at hundreds of megabits per second to gigabits per second and can complement fiber-to-the-home (FTTH) and wired broadband (or DOCSIS). Such speeds are needed to deliver TVs at 4K or higher resolutions (6K, 8K, and more), as well as virtual reality and augmented reality. Virtual reality (VR) and augmented reality (AR) applications include almost immersive motion games. Specific applications may require special network configurations. For example, for VR games, game companies need to integrate their core servers into the network operator's edge network servers to minimize latency.

[0050] The automotive industry, along with numerous use cases for mobile communications in vehicles, is expected to be a significant new driving force in 5G. For example, passenger entertainment requires high concurrent capacity and highly mobile broadband. This is because future users continue to expect high-quality connectivity regardless of their location and speed. Another use case in the automotive sector is AR dashboards. AR dashboards allow drivers to identify objects in the dark in addition to those seen through the front window, displaying distances and movement of objects by overlaying information spoken to the driver. In the future, wireless modules will enable communication between vehicles, information exchange between vehicles and supporting infrastructure, and information exchange between vehicles and other connected devices, such as pedestrian-accompanied devices. Safety systems will guide alternative routes, allowing drivers to drive more safely and thus reducing the risk of accidents. The next stage will be remotely controlled or self-driving vehicles. This requires very high reliability and very fast communication between different self-driving vehicles and between vehicles and infrastructure. In the future, self-driving vehicles will perform all driving activities, and drivers will only focus on abnormal traffic that the vehicle cannot recognize. The technological requirements for self-driving vehicles necessitate ultra-low latency and ultra-high reliability, increasing traffic safety to levels that cannot be achieved by humans.

[0051] Smart cities and smart homes / buildings, touted as part of a smart society, will be embedded in high-density wireless sensor networks. These distributed networks of smart sensors will identify conditions for cost- and energy-efficient maintenance in cities or homes. Similar configurations can be implemented for specific homes. All temperature sensors, window and heating controllers, burglar alarms, and home appliances will be wirelessly connected. Many of these sensors are typically low in terms of data transmission rates, power consumption, and cost. However, certain types of devices may require real-time HD video for monitoring.

[0052] The consumption and distribution of energy, including heat and gases, at a higher level necessitates automated control of distribution sensor networks. Smart grids collect information and use digital information and communication technologies to connect sensors to each other, thereby enabling actions based on the collected information. Because this information can include the behavior of supply companies and consumers, smart grids can improve the distribution of fuels such as electricity through methods that are efficient, reliable, economically feasible, production sustainable, and automated. Smart grids can also be considered as another type of sensor network with low latency.

[0053] Mission-critical applications, such as e-health, are one of the use cases for 5G. The health component includes many applications that can benefit from mobile communications. Communication systems can support telemedicine, enabling the delivery of clinical care in remote locations. Telemedicine can help reduce barriers of distance and improve access to healthcare services that are not readily available in remote rural areas. Telemedicine is also used to administer vital treatments and save lives in emergency situations. Mobile communication-based wireless sensor networks can provide remote monitoring and sensing of parameters such as heart rate and blood pressure.

[0054] Wireless and mobile communications are becoming increasingly important in industrial applications. Cabling is costly in terms of installation and maintenance. Therefore, the possibility of replacing cables with reconfigurable radio links presents an attractive opportunity in many industrial sectors. However, to achieve this replacement, wireless connections need to have similar latency, reliability, and capacity to cables, and simplified management of wireless connections is required. When connecting to 5G, low latency and a very low error probability become new requirements.

[0055] Logistics and freight tracking are important use cases for mobile communications, allowing inventory and packages to be tracked anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates but demand location information with wide coverage and reliability.

[0056] Reference Figure 1 The communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Although Figure 1 An example of a 5G network as a network of communication system 1 is illustrated, but the implementation of this disclosure is not limited to 5G systems and can be applied to future communication systems other than 5G systems.

[0057] BS 200 and network 300 can be implemented as wireless devices, and a particular wireless device can operate as a BS / network node relative to other wireless devices.

[0058] Wireless devices 100a to 100f represent devices that use radio access technology (RAT) (e.g., 5G New RAT (NR) or LTE) to perform communication, and may be referred to as communication / wireless / 5G devices. Wireless devices 100a to 100f may include, but are not limited to, robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, IoT devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. Vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include AR / VR / mixed reality (MR) devices and may be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters.

[0059] In this disclosure, wireless devices 100a to 100f may be referred to as user equipment (UE). For example, a UE may include a cellular phone, smartphone, laptop computer, digital broadcasting terminal, personal digital assistant (PDA), portable multimedia player (PMP), navigation system, tablet PC, ultrabook, vehicle, vehicle with autonomous driving capability, connected car, UAV, AI module, robot, AR device, VR device, MR device, hologram device, public safety device, MTC device, IoT device, medical device, Fintech device (or financial device), security device, weather / environment device, device related to 5G services, or device related to the Fourth Industrial Revolution.

[0060] UAVs can be, for example, aircraft that are driven by wireless control signals without any human passengers.

[0061] VR devices may include, for example, means for realizing objects or backgrounds in a virtual world. AR devices may include, for example, means for connecting objects or backgrounds in a virtual world to objects or backgrounds in the real world. MR devices may include, for example, means for incorporating objects or backgrounds in a virtual world into objects or backgrounds in the real world. Holographic devices may include, for example, means for realizing 360-degree stereoscopic images by recording and reproducing stereoscopic information, which utilizes the interference phenomenon of light generated when two lasers, known as holographic imaging, meet.

[0062] Public safety devices may include, for example, image relay devices or image devices that can be worn on a user's body.

[0063] MTC devices and IoT devices can be, for example, devices that do not require direct human intervention or manipulation. For example, MTC devices and IoT devices can include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0064] Medical devices can be, for example, devices used for the purpose of diagnosing, treating, alleviating, curing, or preventing disease. For example, a medical device can be a device used for the purpose of diagnosing, treating, alleviating, or correcting an injury or lesion. For example, a medical device can be a device used for the purpose of examining, replacing, or modifying a structure or function. For example, a medical device can be a device used for regulating pregnancy. For example, medical devices can include devices for treatment, devices for operation, devices for (in vitro) diagnosis, hearing aids, or devices for surgery.

[0065] Safety devices can be, for example, devices installed to prevent potential hazards and maintain safety. Safety devices can be cameras, closed-circuit television (CCTV), recorders, or black boxes.

[0066] FinTech devices can be, for example, devices capable of providing financial services such as mobile payments. For instance, FinTech devices can include payment devices or point-of-sale (POS) systems.

[0067] Weather / environment devices may include, for example, devices for monitoring or predicting weather / environment.

[0068] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using 3G networks, 4G (e.g., LTE) networks, 5G (e.g., NR) networks, and super 5G networks. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without going through BS 200 / network 300 (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0069] Wireless communication / connections 150a, 150b, and 150c can be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS 200 and / or between BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication (or device-to-device (D2D) communication) 150b, and inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)). Wireless devices 100a to 100f and BS 200 / wireless devices 100a to 100f can transmit / receive radio signals to each other via wireless communication / connections 150a, 150b, and 150c. For example, wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. Therefore, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed based on various proposals of this disclosure.

[0070] Here, the radio communication technologies implemented in the wireless devices of this disclosure may include narrowband Internet of Things (NB-IoT) technologies for low-power communication, as well as LTE, NR, and 6G. For example, NB-IoT technology may be an example of low-power wide-area network (LPWAN) technology, implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the aforementioned names. Additionally and / or alternatively, the radio communication technologies implemented in the wireless devices of this disclosure may communicate based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as enhanced machine-type communication (eMTC). For example, LTE-M technology may be implemented in at least one of various specifications such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine-type communication, and / or 7) LTE M, and may not be limited to the aforementioned names. Additionally and / or alternatively, the radio communication technology implemented in the wireless devices of this disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN, which are considered low-power communication technologies, and may not be limited to the names mentioned above. For example, ZigBee technology may be based on various specifications such as IEEE 802.15.4 to generate personal area networks (PANs) associated with small / low-power digital communication, and may be referred to by various names.

[0071] Figure 2An example of a wireless device that applies the implementation of this disclosure is shown.

[0072] Reference Figure 2 The first wireless device 100 and the second wireless device 200 can transmit / receive radio signals to / from external devices via various RATs (e.g., LTE and NR). Figure 2 In this context, {the first wireless device 100 and the second wireless device 200} can correspond to the attached... Figure 1 At least one of {wireless devices 100a to 100f and BS 200}, {wireless devices 100a to 100f and wireless devices 100a to 100f} and / or {BS 200 and BS 200}.

[0073] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in this disclosure. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information related to the operation of the processors 102. For example, the memories 104 may store commands for performing part or all of the processes controlled by the processors 102, or software code for performing the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in this disclosure. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each of transceivers 106 may include a transmitter and / or a receiver. Transceivers 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, first wireless device 100 may represent a communication modem / circuit / chip.

[0074] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in this disclosure. For example, the processors 202 may process information in the memories 204 to generate a third message / signal, and then transmit a radio signal including the third message / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth message / signal via the transceivers 206, and then store the information obtained by processing the fourth message / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information related to the operation of the processors 202. For example, the memories 204 may store software code including commands for performing part or all of the processes controlled by the processors 202 or for performing the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in this disclosure. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each of transceivers 206 may include a transmitter and / or a receiver. Transceivers 206 may be used interchangeably with RF units. In this disclosure, second wireless device 200 may represent a communication modem / circuit / chip.

[0075] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers can be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 can implement one or more layers (e.g., functional layers such as the Physical (PHY) layer, Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, and Service Data Adaptive Protocol (SDAP) layer). Based on the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure, one or more processors 102 and 202 can generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs). One or more processors 102 and 202 can generate messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206, and acquire PDUs, SDUs, messages, control information, data, or information in accordance with the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure.

[0076] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to perform the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure may be included in one or more processors 102 and 202, or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, suggestions, methods and / or operation flowcharts disclosed in this disclosure may be implemented in the form of firmware or software in the form of code, commands and / or sets of commands.

[0077] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured using read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0078] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed herein to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed herein from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.

[0079] One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed herein via one or more antennas 108 and 208. In this disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0080] One or more transceivers 106 and 206 can convert received radio signals / channels, etc., from RF band signals to baseband signals for processing received user data, control information, radio signals / channels, etc. One or more transceivers 106 and 206 can also convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, transceivers 106 and 206, under the control of processors 102 and 202, can up-convert OFDM baseband signals to a carrier frequency using their (analog) oscillators and / or filters, and transmit the up-converted OFDM signal at the carrier frequency. Transceivers 106 and 206 can receive OFDM signals at the carrier frequency and, under the control of processors 102 and 202, down-convert OFDM signals to OFDM baseband signals using their (analog) oscillators and / or filters.

[0081] In the implementation of this disclosure, the UE can operate as a transmitting device in the uplink (UL) and as a receiving device in the downlink (DL). In the implementation of this disclosure, the BS can operate as a receiving device in the UL and as a transmitting device in the DL. For ease of description, it is primarily assumed below that the first wireless device 100 acts as the UE and the second wireless device 200 acts as the BS. For example, a processor 102 connected to, installed on, or started in the first wireless device 100 can be configured to perform UE actions according to the implementation of this disclosure, or to control the transceiver 106 to perform UE actions according to the implementation of this disclosure. A processor 202 connected to, installed on, or started in the second wireless device 200 can be configured to perform BS actions according to the implementation of this disclosure, or to control the transceiver 206 to perform BS actions according to the implementation of this disclosure.

[0082] In this disclosure, BS is also referred to as Node B (NB), eNodeB (eNB), or gNB.

[0083] Figure 3 An example of a wireless device that applies the implementation of this disclosure is shown.

[0084] Wireless devices can be implemented in various forms depending on the use case / service (see reference). Figure 1 ).

[0085] Reference Figure 3 Wireless devices 100 and 200 can correspond to Figure 2 The wireless devices 100 and 200 can be configured from various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 2 One or more processors 102 and 202 and / or Figure 2 One or more memories 104 and 204. For example, transceiver 114 may include... Figure 2 One or more transceivers 106 and 206 and / or Figure 2One or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory unit 130, and add-on components 140, and controls the overall operation of each of wireless devices 100 and 200. For example, control unit 120 can control the electrical / mechanical operation of each of wireless devices 100 and 200 based on programs / code / commands / information stored in memory unit 130. Control unit 120 can transmit information stored in memory unit 130 to an external source (e.g., other communication device) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication device) via wireless / wired interface in memory unit 130 via communication unit 110.

[0086] The add-on component 140 can be configured differently depending on the type of wireless devices 100 and 200. For example, the add-on component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit (e.g., an audio I / O port, a video I / O port), a drive unit, and a computing unit. Wireless devices 100 and 200 can be, but are not limited to, robots ( Figure 1 100a), vehicles ( Figure 1 100b-1 and 100b-2), XR device ( Figure 1 100c), handheld device ( Figure 1 100d), home appliances ( Figure 1 100e), IoT devices ( Figure 1 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, Fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 1 400), BSS ( Figure 1 This can be achieved in the form of wireless devices 100 and 200, network nodes, etc. Wireless devices 100 and 200 can be used in mobile or fixed locations depending on the usage example / service.

[0087] exist Figure 3In wireless devices 100 and 200, the various elements, components, units / parts, and / or modules as a whole can be connected to each other via a wired interface, or at least a portion thereof can be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired connected, and control unit 120 and first units (e.g., 130 and 140) can be wirelessly connected via communication unit 110. Each element, component, unit / part, and / or module within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured by a group of one or more processors. As an example, control unit 120 may be configured by a group of communication control processors, application processors (APs), electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory unit 130 may be configured with RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0088] Figure 4 Another example of a wireless device that applies the implementation of this disclosure is shown.

[0089] Reference Figure 4 Wireless devices 100 and 200 can correspond to Figure 2 The wireless devices 100 and 200 can be configured from various elements, components, units / parts and / or modules.

[0090] The first wireless device 100 may include at least one transceiver, such as transceiver 106, and at least one processing chip, such as processing chip 101. Processing chip 101 may include at least one processor, such as processor 102, and at least one memory, such as memory 104. Memory 104 may be operatively connected to processor 102. Memory 104 may store various types of information and / or instructions. Memory 104 may store software code 105, which implements instructions that, when executed by processor 102, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. For example, software code 105 may implement instructions that, when executed by processor 102, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. For example, software code 105 may control processor 102 to execute one or more protocols. For example, software code 105 may control processor 102 to execute one or more layers of a radio interface protocol.

[0091] The second wireless device 200 may include at least one transceiver, such as transceiver 206, and at least one processing chip, such as processing chip 201. Processing chip 201 may include at least one processor, such as processor 202, and at least one memory, such as memory 204. Memory 204 may be operatively connected to processor 202. Memory 204 may store various types of information and / or instructions. Memory 204 may store software code 205, which implements instructions that, when executed by processor 202, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. For example, software code 205 may implement instructions that, when executed by processor 202, execute the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. For example, software code 205 may control processor 202 to execute one or more protocols. For example, software code 205 may control processor 202 to execute one or more layers of a wireless interface protocol.

[0092] Figure 5 An example of a UE that applies the implementation of this disclosure is shown.

[0093] Reference Figure 5 UE 100 can correspond to Figure 2 The first wireless device 100 and / or Figure 4 The first wireless device 100.

[0094] The UE 100 includes a processor 102, a memory 104, a transceiver 106, one or more antennas 108, a power management module 110, a battery 1112, a display 114, a keyboard 116, a subscriber identification module (SIM) card 118, a speaker 120, and a microphone 122.

[0095] Processor 102 may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. Processor 102 may be configured to control one or more other components of UE 100 to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed in this disclosure. A layer of the radio interface protocol may be implemented in processor 102. Processor 102 may include an ASIC, other chipsets, logic circuitry, and / or data processing means. Processor 102 may be an application processor. Processor 102 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (modulator and demodulator). Examples of processor 102 can be found in Qualcomm... ® Manufacturing SNAPDRAGON TM Series processors, Samsung ®EXYNOS manufactured TM Series processors, Apple ® A-series processors manufactured by MediaTek ® HELIO manufactured TM Series processors, Intel ® Manufactured ATOM TM This series of processors or the corresponding next-generation processors.

[0096] Memory 104 is operatively coupled to processor 102 and stores various information to operate processor 102. Memory 104 may include ROM, RAM, flash memory, memory card, storage medium, and / or other storage devices. When the implementation is software-based, the techniques described herein can be implemented using modules (e.g., processes, functions, etc.) that perform the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed herein. Modules may be stored in memory 104 and executed by processor 102. Memory 104 may be implemented within or outside processor 102, in which case memory 104 may be communicatively coupled to processor 102 via various means known in the art.

[0097] Transceiver 106 is operatively coupled to processor 102 and transmits and / or receives radio signals. Transceiver 106 includes a transmitter and a receiver. Transceiver 106 may include baseband circuitry for processing radio frequency signals. Transceiver 106 controls one or more antennas 108 to transmit and / or receive radio signals.

[0098] The power management module 110 manages the power of the processor 102 and / or transceiver 106. The battery 112 supplies power to the power management module 110.

[0099] Display 114 outputs the results processed by processor 102. Keyboard 116 receives input to be used by processor 102. Keyboard 16 can be displayed on display 114.

[0100] The SIM 118 is an integrated circuit designed to securely store the International Mobile Subscriber Identity (IMSI) number and its associated keys, used for identifying and authenticating subscribers on mobile devices such as mobile phones and computers. Contact information can also be stored on many SIM cards.

[0101] Speaker 120 outputs sound-related results processed by processor 102. Microphone 122 receives sound-related inputs to be used by processor 102.

[0102] Figure 6 and Figure 7An example of a protocol stack in a 3GPP-based wireless communication system applying the implementation of this disclosure is shown.

[0103] Specifically, Figure 6 An example of the user plane protocol stack for the radio interface between the UE and the BS is illustrated, and Figure 7 An example of a radio interface control plane protocol stack between a UE and a BS is illustrated. The control plane refers to the path through which control messages used to manage calls made by the UE and the network are transmitted. The user plane refers to the path through which data generated in the application layer (e.g., voice data or Internet packet data) is transmitted. See reference... Figure 6 The user plane protocol stack can be divided into Layer 1 (i.e., the PHY layer) and Layer 2. (See reference...) Figure 7 The control plane protocol stack can be divided into Layer 1 (i.e., the PHY layer), Layer 2, Layer 3 (e.g., the RRC layer), and the Non-Access Layer (NAS). Layers 1, 2, and 3 are referred to as the Access Layer (AS).

[0104] In 3GPP LTE systems, Layer 2 is separated into the following sublayers: MAC, RLC, and PDCP. In 3GPP NR systems, Layer 2 is separated into the following sublayers: MAC, RLC, PDCP, and SDAP. The PHY layer provides transport channels to the MAC sublayer, the MAC sublayer provides logical channels to the RLC sublayer, the RLC sublayer provides RLC channels to the PDCP sublayer, and the PDCP sublayer provides radio bearers to the SDAP sublayer. The SDAP sublayer provides Quality of Service (QoS) streams to the 5G core network.

[0105] In the 3GPP NR system, the main services and functions of the MAC sublayer include: mapping between logical channels and transport channels; multiplexing / demultiplexing MAC SDUs belonging to one or different logical channels to / from the transport channel to the physical layer / from the physical layer to transport blocks (TBs); scheduling information reporting; error correction via Hybrid Automatic Repeat Request (HARQ) (one HARQ entity per cell in the case of carrier aggregation (CA); priority handling between UEs via dynamic scheduling; priority handling between logical channels of a UE via logical channel priority ordering; and padding. A single MAC entity can support multiple parameter sets, transmission timings, and cells. Mapping constraints in logical channel priority ordering control which parameter set(s), cell(s), and transmission timing(s) a logical channel(s) can use.

[0106] MAC provides different types of data transmission services. To accommodate these different services, various types of logical channels are defined, each supporting the transmission of a specific type of information. Each logical channel type is defined by the type of information being transmitted. Logical channels are divided into two groups: control channels and traffic channels. Control channels are used only for transmitting control plane information, while traffic channels are used only for transmitting user plane information. The Broadcast Control Channel (BCCH) is a downlink logical channel used for broadcasting system control information. The Paging Control Channel (PCCH) is a downlink logical channel that transmits paging information, system information change notifications, and indications of ongoing Public Warning Service (PWS) broadcasts. The Common Control Channel (CCCH) is a logical channel used to send control information between the UE and the network and is used by UEs without an RRC connection to the network. The Dedicated Control Channel (DCCH) is a point-to-point bidirectional logical channel used by UEs with an RRC connection to send dedicated control information between the UE and the network. The Dedicated Traffic Channel (DTCH) is a point-to-point logical channel dedicated to a single UE for transmitting user information. DTCHs can exist in both the uplink and downlink. In the downlink, the following connections exist between logical channels and transport channels: BCCH can be mapped to the broadcast channel (BCH); BCCH can be mapped to the downlink shared channel (DL-SCH); PCCH can be mapped to the paging channel (PCH); CCCH can be mapped to DL-SCH; DCCH can be mapped to DL-SCH; and DTCH can be mapped to DL-SCH. In the uplink, the following connections exist between logical channels and transport channels: CCCH can be mapped to the uplink shared channel (UL-SCH); DCCH can be mapped to UL-SCH; and DTCH can be mapped to UL-SCH.

[0107] The RLC sublayer supports three transmission modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). RLC configuration is per logical channel and is not dependent on parameter sets and / or transmission duration. In 3GPP NR systems, the main services and functions of the RLC sublayer depend on the transmission mode and include: transmission of upper-layer PDUs; sequence numbering independent of sequence numbering in PDCP (UM and AM); error correction via ARQ (AM only); RLC SDU segmentation (AM and UM) and re-segmentation (AM only); SDU reassembly (AM and UM); duplicate detection (AM only); RLC SDU discarding (AM and UM); RLC re-establishment; and protocol error detection (AM only).

[0108] In the 3GPP NR system, the main services and functions of the PDCP sublayer for the user plane include: sequence numbering; header compression and decompression using robust header compression (ROHC); transmission of user data; reordering and duplicate detection; in-order delivery; PDCP PDU routing (in the case of separate bearers); retransmission of PDCP SDUs; encryption, decryption, and integrity protection; PDCP SDU discarding; PDCP re-establishment and data recovery for RLC AM; PDCP status reporting for RLC AM; and PDCP PDU duplication and duplicate discarding indication to lower layers. The main services and functions of the PDCP sublayer for the control plane include: sequence numbering; encryption, decryption, and integrity protection; transmission of control plane data; reordering and duplicate detection; in-order delivery; and PDCP PDU duplication and duplicate discarding indication to lower layers.

[0109] In the 3GPP NR system, the main services and functions of SDAP include: mapping between QoS flows and data radio bearers; and marking QoS flow IDs (QFIs) in both DL and UL packets. A single protocol entity for SDAP is configured for each individual PDU session.

[0110] In the 3GPP NR system, the main services and functions of the RRC sublayer include: broadcasting system information related to AS and NAS; paging initiated by 5GC or NG-RAN; establishment, maintenance, and release of RRC connections between UE and NG-RAN; security functions including key management; establishment, configuration, maintenance, and release of signaling radio bearers (SRB) and data radio bearers (DRB); mobility functions (including: handover and context delivery, UE cell selection and reselection, and control of cell selection and reselection, and inter-RAT mobility); QoS management functions; UE measurement reporting and control of reports; detection and recovery of radio link failures; and NAS message delivery from UE to NAS / from NAS to UE.

[0111] Figure 8 The frame structure in a 3GPP-based wireless communication system applying the implementation of this disclosure is shown.

[0112] Figure 8The frame structure shown is merely exemplary, and the number of subframes, the number of time slots, and / or the number of symbols in a frame can vary. In 3GPP-based wireless communication systems, OFDM parameter sets (e.g., subcarrier spacing (SCS), transmission time interval (TTI) durations) can be configured differently across multiple cells aggregated for a UE. For example, if the UE is configured with different SCSs for cells aggregated for cell aggregation, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) comprising the same number of symbols can be different across the aggregated cells. In this document, symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0113] Reference Figure 8 Downlink and uplink transmissions are organized into frames. Each frame has a T f =10ms duration. Each frame is divided into two half-frames, each half-frame having a duration of 5ms. Each half-frame consists of 5 subframes, where the duration T of each subframe is... sf It is 1ms. Each subframe is divided into time slots, and the number of time slots in a subframe depends on the subcarrier spacing. Each time slot includes 14 or 12 OFDM symbols based on the cyclic prefix (CP). In normal CP, each time slot includes 14 OFDM symbols, and in extended CP, each time slot includes 12 OFDM symbols. The parameter set is based on an exponentially scalable subcarrier spacing Δf = 2. u 15kHz.

[0114] Table 1 shows the results based on subcarrier spacing Δf = 2. u The number N of OFDM symbols per time slot at 15 kHz slot symb The number of time slots N in each frame frame,u slot And the number of time slots N for each subframe of a normal CP. subframe,u slot .

[0115] [Table 1]

[0116] Table 2 shows the results based on subcarrier spacing Δf = 2. u The number N of OFDM symbols per time slot at 15 kHz slot symb The number of time slots N in each frame frame,uslot And the number of time slots N for each subframe of the extended CP. subframe,u slot .

[0117] [Table 2]

[0118] A time slot comprises multiple symbols (e.g., 14 or 12 symbols) in the time domain. For each parameter set (e.g., subcarrier spacing) and carrier, a common resource block (CRB) N is generated from the signaling of higher layers (e.g., RRC signaling). start,u grid Initially, N was defined. size,u grid,x N RB sc Subcarriers and N subframe,u symb A resource grid of N OFDM symbols, where N size,u grid,x This represents the number of resource blocks (RBs) in the resource grid, where the subscript x represents the downlink DL and the uplink UL. N RB sc N is the number of subcarriers in each RB. In 3GPP-based wireless communication systems, N RB sc Typically, it is 12. For a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL), there exists a resource grid. The carrier bandwidth N for the subcarrier spacing configuration u is... size,u grid Given by higher-layer parameters (e.g., RRC parameters). Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and a complex symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l representing the symbol position relative to a reference point in the time domain. In 3GPP-based wireless communication systems, RBs are defined by 12 consecutive subcarriers in the frequency domain.

[0119] In 3GPP NR systems, Resource Blocks (RBs) are classified into CRBs and Physical Resource Blocks (PRBs). CRBs are numbered upwards from 0 in the frequency domain for subcarrier spacing configuration u. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u coincides with "point A," which serves as the common reference point for the resource block grid. In 3GPP NR systems, PRBs are defined within the Bandwidth Part (BWP) and numbered from 0 to N. size BWP,i -1 is the number, where i is the number of the bandwidth section. The physical resource block n within bandwidth section i... PRBWith public resource block n CRB The relationship between n is as follows: PRB =n CRB +N size BWP,i , where N size BWP,i The bandwidth portion is the common resource block starting relative to CRB 0. A BWP comprises multiple consecutive RBs. A carrier can include up to N (e.g., 5) BWPs. A UE can be configured with one or more BWPs on a given component carrier. Only one BWP can be active at a time among the BWPs configured for the UE. The active BWP is defined within the UE's operating bandwidth of the cell.

[0120] NR bands can be defined as two types of frequency ranges, namely FR1 and FR2. The numerical values ​​of the frequency ranges can be varied. For example, the frequency ranges of the two types (FR1 and FR2) can be shown in Table 3 below. For ease of explanation, in the frequency ranges used in NR systems, FR1 can represent "below 6 GHz range", FR2 can represent "above 6 GHz range", and can be referred to as millimeter wave (mmW).

[0121] [Table 3]

[0122] As mentioned above, the frequency range of the NR system can be varied. For example, FR1 can include a frequency band from 410 MHz to 7125 MHz, as shown in Table 4 below. That is, FR1 can include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or greater. For example, the 6 GHz (or 5850, 5900, 5925 MHz, etc.) or greater frequency band included in FR1 can include unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes, such as for vehicle communications (e.g., autonomous driving).

[0123] [Table 4]

[0124] In this disclosure, the term "cell" can refer to a geographical area in which one or more nodes provide a communication system or to a radio resource. A "cell" as a geographical area can be understood as the coverage area within which a node can provide services using a carrier, and a "cell" as a radio resource (e.g., a time-frequency resource) is associated with bandwidth, which is a frequency range configured by a carrier. A "cell" associated with a radio resource is defined by a combination of downlink and uplink resources (e.g., a combination of DL component carriers (CC) and UL CC). A cell can be configured by downlink resources only, or it can be configured by both downlink and uplink resources. Since DL coverage (which is the range within which a node can transmit a valid signal) and UL coverage (which is the range within which a node can receive a valid signal from a UE) depend on the carrier carrying the signal, a node's coverage area can be associated with the coverage area of ​​the "cell" of the radio resources used by the node. Therefore, the term "cell" can be used to sometimes refer to the service coverage area of ​​a node, at other times to a radio resource, or at other times to the range within which a signal using a radio resource can reach with effective strength.

[0125] In CA, two or more CCs are aggregated. A UE can receive or transmit on one or more CCs simultaneously, depending on its capabilities. CA is supported for both continuous and non-continuous CCs. When CA is configured, the UE has only one RRC connection with the network. During RRC connection establishment / re-establishment / handover, one serving cell provides NAS mobility information, and during RRC connection re-establishment / handover, one serving cell provides security input. This cell is called the primary cell (PCell). The PCell is the cell operating on the primary frequency, where the UE performs the initial connection establishment procedure or initiates the connection re-establishment procedure. Depending on the UE's capabilities, secondary cells (SCells) can be configured to form a set of serving cells together with the PCell. An SCell is a cell that provides additional radio resources above a special cell (PCell). Therefore, the set of serving cells configured for a UE always consists of one PCell and one or more SCells. For dual connectivity (DC) operation, the term "PCell" refers to the PCell of the primary cell group (MCG) or the primary SCell (PSCell) of the secondary cell group (SCG). The SpCell supports PUCCH transmission and contention-based random access and is always active. The MCG is the set of serving cells associated with the primary node, comprising the SpCell (PCell) and optionally one or more SCells. For a UE with a DC configured, the SCG is a subset of serving cells associated with the secondary node, comprising the PSCell and zero or more SCells. For a UE in RRC_CONNECTED without a CA / DC configured, only one serving cell consisting of PCells exists. For a UE in RRC_CONNECTED with a CA / DC configured, the term "serving cell" is used to refer to the set of cells consisting of the SpCell and all SCells. In the DC, two MAC entities are configured in the UE: one for the MCG and one for the SCG.

[0126] Figure 9 An example of a data flow in a 3GPP NR system applying the implementation of this disclosure is shown.

[0127] Reference Figure 9 “RB” indicates a radio bearer, and “H” indicates a header. Radio bearers are classified into two groups: DRBs for user plane data and SRBs for control plane data. MAC PDUs are sent / received to / from external devices via the PHY layer using radio resources. MAC PDUs arrive at the PHY layer in the form of transport blocks.

[0128] In the PHY layer, the uplink transport channels UL-SCH and RACH are mapped to their respective physical channels PUSCH and PRACH, and the downlink transport channels DL-SCH, BCH, and PCH are mapped to PDSCH, PBCH, and PDSCH, respectively. In the PHY layer, uplink control information (UCI) is mapped to the physical PUCCH, and downlink control information (DCI) is mapped to the PDCCH. MAC PDUs associated with UL-SCH are transmitted by the UE via PUSCH based on UL authorization, and MAC PDUs associated with DL-SCH are transmitted by the BS via PDSCH based on DL assignment.

[0129] The technical features related to conditional reconfiguration are described below. Refer to the sections in 3GPP TS38.331 v17.2.0 for details.

[0130] In conditional reconfiguration, the network configures the UE using one or more candidate target SpCells. The UE evaluates the conditions of each configured candidate target SpCell. The UE applies the conditional reconfiguration associated with one of the target SpCells that meets the associated execution conditions. Conditional Reconfiguration IE provides configuration parameters for the target SpCell.

[0131] In NR-DC, the UE can receive two independent signals. conditionalReconfiguration : - The conditional reconfiguration associated with MCG, which is included in the data received via SRB1. RRCReconfiguration In the message; and - Associated with SCG conditionalReconfiguration It is included in the data received via SRB3. RRCReconfiguration In the message, or alternatively, included in the message received via SRB1 RRCReconfiguration In the message RRCReconfiguration In the message.

[0132] in this case: - UE maintains two independent VarConditionalReconfig One with each conditionalReconfiguration Related; - Unless otherwise explicitly stated, the UE performs independently for each conditionalReconfiguration and related VarConditionalReconfig All processes; - UE execution and image measConfig Associated with the same cell group VarConditionalReconfig The process.

[0133] UE based on received Conditional Reconfiguration IE performs the following actions: 1> If Conditional Reconfiguration Include condReconfigToRemoveList : 2> Execute the condition reconfiguration removal process; 1> If Conditional Reconfiguration Include condReconfigToAddModList : 2> Reconfigure execution conditions (add / modify)

[0134] Condition reconfiguration: add / modify

[0135] For in condReconfigToAddModList Each received in IE condReconfigId UE should: 1> If there is a match condReconfigId The entries exist VarConditionalReconfig within condReconfigToAddModList middle: 2> If condReconfigToAddModList The entries include condExecutionCond or condExecutionCondSCG ; 3> Use targeted methods condReconfigId Replace the received value VarConditionalReconfig within condExecutionCond or condExecutionCondSCG ; 2> If condReconfigToAddModList The entries include condRRCReconfig ; 3> Use targeted methods condReconfigId Replace the received value VarConditionalReconfig within condRRCReconfig ; 1> Otherwise: 2> In VarConditionalReconfig Add internal targeting condReconfigId New entry; 1> Execution condition reconfiguration assessment; Condition reconfiguration assessment UE should: 1> For VarConditionalReconfig Each of the inside condReconfigId : 2> If condRRCReconfig within RRCReconfiguration Includes reconfigurationWithSync of masterCellGroup : 3> Will have the same as the received condRRCReconfig In masterCellGroup within reconfigurationWithSync Included ServingCellConfigCommon Cells whose physical cell identifiers match the values ​​indicated in the middle are considered applicable cells; 2> Otherwise if condRRCReconfig within RRCReconfiguration Includes reconfigurationWithSync of secondaryCellGroup : 3> Will have the same as the received condRRCReconfig within secondaryCellGroup within reconfigurationWithSync Included in ServingCellConfigCommon Cells whose physical cell identifiers match the values ​​indicated in the middle are considered applicable cells; 2> If configured condExecutionCondSCG : 3> In the remainder of the process, condExecutionCondSCG Each indicated in measId Considered as being related to SCG measConfig Related VarMeasConfig In measId ; 2> If configured condExecutionCond : 3> If configured via SRB3 or via SRB1 nr-SCG Internal configuration or nr- SecondaryCellGroupConfig Internal configuration: 4> In the remainder of the process, condExecutionCond Each indicated in measId Considered as being related to SCG measConfig Related VarMeasConfig In measId ; 3> Otherwise: 4> In the remainder of the process, condExecutionCond Each indicated in measId Considered to be related to MCG measConfig Related VarMeasConfig In measId ; 2> Regarding condReconfigId Related condExecutionCond or condExecutionCondSCG The instructions in the middle VarMeasConfig within measIdList Each included measId : 3> If condEventId and condEventT1 Related, and if applicable to condReconfigId The associated event (i.e., with) VarConditionalReconfig The corresponding inside condTriggerConfig of condEventId The entry conditions for the corresponding event are met for the applicable cell; or 3> If condEventId and condEventD1 Related, and if applicable to condReconfigId The associated event (i.e., with) VarConditionalReconfig The corresponding inside condTriggerConfig of condEventId The entry conditions for the corresponding event are in VarConditionalReconfig The corresponding event is defined internally. timeToTrigger During this period, the requirements for the applicable communities are met; or 3> If condEventId and condEventA3 , condEventA4 or condEventA5 Related, and if applicable to condReconfigId The associated event (i.e., with) VarConditionalReconfig The corresponding inside condTriggerConfig of condEventId The entry conditions for the corresponding event are for... VarConditionalReconfig The corresponding event is defined internally. timeToTrigger All measurements performed during the Layer 3 filtering process are satisfied for the applicable cells: 4> Will be with this measId The associated event is considered to be satisfied; 3> If targeting and condReconfigId The related event measId It has been modified; or 3> If condEventId and condEventT1 Related, and if applicable to condReconfigId The associated event (i.e., with) VarConditionalReconfig The corresponding within condTriggerConfig of condEventId The departure conditions (corresponding events) are met for the applicable cell; or 3> If condEventId and condEventD1 Related, and if applicable to condReconfigId The associated event (i.e., with) VarConditionalReconfig The corresponding inside condTriggerConfig of condEventId The conditions for leaving the corresponding event are in VarConditionalReconfig The corresponding event is defined internally. timeToTrigger During this period, the requirements for the applicable communities are met; or 3> If condEventId and condEventA3 , condEventA4 or condEventA5 Related, and if with condReconfigId The associated one applies to this event (i.e., with) VarConditionalReconfig The corresponding inside condTriggerConfig of condEventId The corresponding event) departure conditions are for in VarConditionalReconfig The inner part is the corresponding definition for this event. timeToTrigger All measurements performed during the Layer 3 filtering process are satisfied for the applicable cells: 4> Will be with this measId The associated event is considered unsatisfied; 2> If it is related to the stored condRRCReconfig Target candidate cells within condTriggerConfig All inside measId The associated event was satisfied: 3> Will be with this condReconfigId Related stored condRRCReconfig The target candidate cell within is considered the trigger cell; 3> Initiate execution by reconfiguring the conditions; - Can be targeted at each condReconfigId Up to 2 configurations MeasId 2 MeasId The conditions for reconfiguring events can have the same or different event conditions, trigger amounts, trigger times, and trigger thresholds.

[0136] Conditional reconfiguration assessment of inter-SN CPC initiated by EN-DC

[0137] UE should: 1> For VarConditionalReconfiguration Each of them condReconfigurationId : 2> For those included in c ondReconfigurationId Related triggerConditionSN In CondReconfigExecCondSCG The instructions in the middle VarMeasConfig within measIdList Each included measId : 3> If applicable to this measId The entry conditions for the associated event are for the event related to that... measId The corresponding event defined by the associated event timeToTrigger All measurements performed during the Layer 3 filtering process are satisfied for the applicable cells: 4> Consider the event as satisfied; 3> If regarding this event measId It has been modified; or 3> If applicable to this measId The associated departure condition for this event is for the purpose of... measId The corresponding event defined by the associated event timeToTrigger All measurements performed during the Layer 3 filtering process are satisfied for the applicable cells: 4> Will be with this measId The associated event is considered unsatisfied; 2> If contained in triggerConditionSN In CondReconfigExecCondSCG The instructions in the middle measId The triggering conditions for all related events are met: 3> Included in the stored data and condReconfigurationId Related condReconfigurationToApply In RRCConnectionReconfiguration In the message nr- SecondaryCellGroupConfig Included RRCReconfiguration The target cell candidate in the message is considered the triggering cell; 3> Initiate execution by reconfiguring the conditions; Conditional reconfiguration execution UE should: 1> If there is more than one triggering cell: 2> Select one of the triggering cells as the selected cell for conditional reconfiguration execution; 1> Otherwise: 2> Treat the triggering cell as the selected cell for conditional reconfiguration execution; 1> For the selected cell where conditional reconfiguration is performed: 2> Apply the stored data of the selected cell condRRCReconfig And perform the aforementioned action; - If multiple NR cells are triggered during conditional reconfiguration execution, the selection of which cell to use (e.g., the UE considers beam and beam quality to select one of the triggering cells for execution) depends on the UE implementation scheme.

[0138] SCG Activation

[0139] When starting the program, the UE should: 1> If the UE is configured with SCG after receiving the message initiating the procedure: 2> If the UE was configured to deactivate an SCG before receiving the message initiating the procedure: 3> Treat SCG as activated; 3> Resume radio link detection on the SCG if it was previously stopped; 3> Instruct the lower layer to resume beam fault detection on PSCell if it was previously stopped; 3> Indicate to lower layers that SCG is activated.

[0140] SCG Deactivation

[0141] When starting the program, the UE should: 1> Treat SCG as deactivated; 1> Indicate to the lower layer that the SCG is deactivated; 1> If bfd-and-RLM Set to true: 2> Perform radio link monitoring on the SCG; 2> Instruct the lower layer to perform beam fault detection on the PSCell; 1> Otherwise: 2> Stop radio link monitoring on the SCG; 2> Instruct the lower layer to stop beam fault detection on the PSCell; 2> Stop timer T310 for this cell group if it is running; 2> Stop timer T312 for this cell group if it is running; 2> Reset counters N310 and N311; 1> If the UE is in RRC_CONNECTED state and the SCG is activated before receiving the message initiating the procedure: 2> If SRB3 is in RRCReconfiguration or RRCConnectionReconfiguration The reception was configured beforehand, and SRB3 will not be based on the information included in the configuration. RRCReconfiguration or RRCConnectionReconfiguration In RadioBearerConfig Released: 3> The PDCP entity that triggers SRB3 executes SDU discard; 3> Recreate the RLC entity of SRB3.

[0142] SCG activation without SN message

[0143] When initiating this process, the UE should: 1> If SCG is executing the procedure that invokes this clause RRCReconfiguration Message or E-UTRA RRCConnectionReconfiguration Message reception was deactivated beforehand: 2> Treat SCG as activated; 2> Indicate to the lower layer that the SCG is activated; 2> Resume radio link monitoring on the SCG if it was previously stopped; 2> Instruct the lower layer to resume beam fault detection on PSCell if it was previously stopped; 2> If the process of executing the invocation of this clause is received RRCReconfiguration Message or E-UTRA RRCConnectionReconfiguration Before the news bfd-and-RLM Not configured as true; or 2> If the lower layer indicates that a random access procedure is required for SCG activation: 3> Initiate a random access procedure on PSCell.

[0144] The technical features related to cell reselection are described below. Refer to the sections in 3GPP TS 38.304v17.6.0 for details.

[0145] For the purposes of cell selection and reselection, the UE will perform measurements.

[0146] When evaluating the Srxlev and Squal of a non-serving cell for cell reselection purposes, the UE will use the parameters provided by the serving cell, and for the final check of the cell selection criteria, the UE will use the parameters provided by the target cell for cell reselection.

[0147] The NAS can control the RAT that should be performed during cell selection, for example, by indicating the RAT associated with the selected PLMN, and by maintaining a list of prohibited registration areas and a list of equivalent PLMNs. The UE should select an appropriate cell based on RRC_IDLE or RRC_INACTIVE state measurements and cell selection criteria.

[0148] To expedite the cell selection process, the UE can use stored information for multiple RATs (if available).

[0149] When camped on a cell, the UE will systematically search for a better cell based on cell reselection criteria. If a better cell is found, it will be selected. A change in cell may mean a change in the RAT (Range Attempt).

[0150] If cell selection and reselection result in changes to the received NAS-related system information, the NAS is notified.

[0151] For normal service, the UE should camp on a suitable cell and monitor the cell's control channel, enabling the UE to: - Receive system information from PLMN or SNPN; and - Receive registration area information, such as tracking area information, from the PLMN or SNPN; and - Receive additional AS and NAS information; and - If you have already registered: - Receive paging and notification messages from the PLMN or SNPN; and - Initiate a transition to connection mode.

[0152] For cell selection in multi-beam operation, the cell measurement depends on the UE implementation scheme.

[0153] For cell reselection in multi-beam operations, including inter-RAT reselection from E-UTRA to NR, the following derives the cell measurements in the beam corresponding to the same cell based on the SS / PBCH block: - if nrofSS-BlocksToAverage (in E-UTRA) maxRS-IndexCellQual Not configured in SIB2 / SIB4 (in E-UTRA) SIB24 (in) or - if absThreshSS-BlocksConsolidation (in E-UTRA) threshRS-index Not configured in SIB2 / SIB4 (in E-UTRA) SIB24 (in) or - If the highest beam measurement value is lower than or equal to at absThreshSS-BlocksConsolidation (in E-UTRA) threshRS-index ): - Derive the cell measurement value to the highest beam measurement value.

[0154] - Otherwise: - Deriving cell measurements as higher than absThreshSS-BlocksConsolidation (in E-UTRA) threshRS-index The highest beam measurement value is as high as nrofSS-BlocksToAverage (in E-UTRA) maxRS-IndexCellQual The linear average of the power values.

[0155] Community selection process

[0156] Cell selection is performed through one of the following two processes: a) Initial cell selection (previously unknown which RF channel has NR frequencies): 1. The UE will scan all RF channels in the NR band according to its capabilities to find a suitable cell.

[0157] 2. At each frequency, the UE only needs to search for the strongest cell, except when accessing the shared spectrum channel, in which the UE can search for the second strongest cell.

[0158] 3. Once you find a suitable neighborhood, you should choose that neighborhood.

[0159] b) Cell selection using stored information: 1. This process requires the stored frequency information, and optionally also information about cell parameters from previously received measurement control information elements or from previously detected cells.

[0160] 2. Once the UE has found a suitable cell, the UE will select it.

[0161] 3. If no suitable cell is found, the initial cell selection process in a) should be started.

[0162] - Priorities between different frequencies or RATs provided to the UE via system information or dedicated signaling are not used during the cell selection process.

[0163] The cell selection criterion S is satisfied under the following conditions: Srxlev > 0 and Squal > 0 in: Srxlev = Q rxlevmeas – (Q rxlevmin + Q rxlevminoffset )– P compensation - Q offsettemp Squal = Q qualmeas – (Q qualmin + Q qualminoffset ) - Q offsettemp Table 5 shows the parameters used for cell selection criteria.

[0164] [Table 5]

[0165] The value Q is notified by the signal. rxlevminoffset and Q qualminoffset The S-criteria of a cell are evaluated as a result of a periodic search of a higher-priority PLMN, and are only applied when the UE is normally camped in the VPLMN. During this periodic search of the higher-priority PLMN, the UE can use parameter values ​​stored from different cells of that higher-priority PLMN to check the S-criteria of the cell.

[0166] Priority handling for reselection

[0167] The absolute priority of different NR frequencies or RAT frequencies can be found in the system information. RRCRelease The message is provided to the UE either in the context of the message or through inheritance from another RAT during inter-RAT cell (re)selection. In the case of system information, NR frequencies or inter-RAT frequencies can be listed without prioritization (i.e., if no field exists for that frequency). cellReselectionPriority If a special signaling is provided with cellReselectionPriority or nsag-CellReselectionPriority If any field is provided in the system information, the UE should ignore it. cellReselectionPriority and nsag-CellReselectionPriority Any field.

[0168] When the UE is in normal camping state, if it supports slice-based cell reselection and has received the network slice and NSAG information to be used for cell reselection from the NAS, the UE will deduce the reselection priority.

[0169] - UE is still there SIB16 Determine the priority of reselection without broadcasting within the residential area.

[0170] If UE is in Reside in any cell In this state, the UE should only apply the priority provided by the system information from the current cell, and the UE should retain the priority information provided by the system information from the current cell. RRCRelease Received in deprioritisationReq The priority provided by dedicated signaling, unless otherwise specified. When a UE in normal camping state has only dedicated priorities other than the current frequency, the UE should consider the current frequency as the lowest priority frequency (i.e., lower than any network configuration value). When a UE with HSDN capability is in a high mobility state, the UE will always consider the HSDN cell as the highest priority (i.e., higher than the priority of any other network configuration). When a UE with HSDN capability is not in a high mobility state, the UE will always consider the HSDN cell as the lowest priority (i.e., lower than the priority of any other network configuration). If the UE is configured to perform both NR sidelink communication and V2X sidelink communication, the UE may consider the frequency providing both NR sidelink communication and V2X sidelink communication configurations as the highest priority. If the UE is configured to perform NR sidelink communication but not V2X communication, the UE may consider the frequency providing V2X sidelink communication configuration as the highest priority. If the UE is configured to perform V2X sidelink communication but not NR sidelink communication, the UE may consider the frequency providing V2X sidelink communication configuration as the highest priority.

[0171] During cell reselection, frequencies that only provide anchor frequency configurations should not be prioritized for V2X services.

[0172] - When a UE is configured to perform cell reselection for NR sidelink communication or V2X sidelink communication, the UE may consider providing intra-carrier and inter-carrier frequencies with the same priority during cell reselection.

[0173] - The priority order among frequencies that the UE considers to be of the highest priority is determined by the UE implementation scheme, unless otherwise stated.

[0174] - If the UE is capable and authorized to perform the corresponding sidelink operation, the UE is configured to perform V2X sidelink communication or NR sidelink communication.

[0175] - When a UE is configured to perform both NR sidelink communication and V2X sidelink communication, but a frequency that can provide both NR sidelink communication configuration and V2X sidelink communication configuration cannot be found, the UE may consider the frequency that provides either NR sidelink communication configuration or V2X sidelink communication configuration to be of the highest priority.

[0176] The UE will only perform cell reselection assessment for NR frequencies and RAT frequencies that are given in the system information and for which the UE has the provided priority.

[0177] If a UE with MBS broadcast capability is receiving or interested in receiving MBS broadcast services, and can only receive these services via a frequency that provides such services and is residing on it, then the UE can consider that frequency to have the highest priority during an MBS broadcast session if the following two conditions are met: 1) The SIB1 scheduling information of the cell reselected by the UE due to frequency prioritization for MBS includes SIB20; 2) Or: - Indicate one or more MBS FSAIs for that frequency in the SIB21 of the serving cell, and also indicate the same MBS FSAI for the MBS broadcast service in the MBS User Service Description (USD), or - SIB21 is not provided in the serving cell and the frequency is included in the USD of the service, or - SIB21 is provided in the serving cell but not for frequency mapping of the associated service, and the frequency is included in the USD of the service.

[0178] When the USD offers multiple frequencies for services of interest to the UE, the choice of which frequency to use depends on the UE implementation plan.

[0179] If a UE with MBS broadcast capability is receiving or interested in receiving MBS broadcast services, then as long as the SIB1 scheduling information of the cell contains SIB20 on the MBS frequency monitored by the UE and as long as condition 2 above is met for the serving cell, the UE can regard the cell reselection candidate frequency that it cannot receive MBS broadcast services during the MBS broadcast session as having the lowest priority.

[0180] - Exemplary scenarios that may require this de-priority include the following: the UE cannot camp on the MBS broadcast frequency (e.g., the MBS broadcast frequency belongs to a different PLMN than the UE's registered PLMN), but the UE can receive MBS broadcast services while camping on a frequency other than the MBS broadcast frequency or the current frequency.

[0181] Frequency prioritization for MBS broadcast, NR sidelink communication, or V2X sidelink communication can override reselection prioritization for slice-based cell reselection.

[0182] When the UE receives a deprioritisationReq of RRCRelease In this case, the UE should transfer the previously received data with... deprioritisationReq of RRCRelease The stored frequencies and the current frequency or all frequencies of the NR are considered the lowest priority frequencies (i.e., lower than any network configuration value), while the T325 is running, regardless of the residing RAT. When performing PLMN selection or SNPN selection according to the NAS request, the UE will delete the stored depriority request.

[0183] - The UE should search for a higher priority stratum for cell reselection as soon as possible after a priority change. The minimum relevant performance requirements still apply.

[0184] - The UE does not consider MBS broadcast, NR sidelink communication, or V2X sidelink communication functions to replace those provided by HSDN or deprioritisationReq Priority of cell reselection caused by request function.

[0185] The UE should remove the priority provided by dedicated signaling in the following situations: - The UE enters different RRC states; or - The optional validity period for the dedicated priority (T320) has expired; or - UE receives a field that does not exist cellReselectionPriorities of RRCRelease Message; or - Perform PLMN selection or SNPN selection based on the NAS's request.

[0186] - Equal priority between RATs is not supported.

[0187] The UE should not consider any of the listed excluded cells as candidates for cell reselection.

[0188] If the listed allowed cells are configured, the UE should only consider them as candidates for cell reselection.

[0189] UEs in RRC_IDLE state should inherit the priority and remaining validity time provided by dedicated signaling (i.e., T320 in NR and E-UTRA) during inter-RAT cell (re)selection (if configured).

[0190] - The network can assign dedicated cell reselection priorities for frequencies that are not configured by system information.

[0191] Community reselection assessment process - reselection priority handling

[0192] The absolute priority of different NR frequencies or RAT frequencies can be found in the system information. RRCRelease The message is provided to the UE either in the context of the message or through inheritance from another RAT during inter-RAT cell (re)selection. In the case of system information, NR frequencies or inter-RAT frequencies can be listed without prioritization (i.e., if no field exists for that frequency). cellReselectionPriority If a special signaling is provided with cellReselectionPriority or nsag-CellReselectionPriority If any field is provided in the system information, the UE should ignore it. cellReselectionPriority and nsag-CellReselectionPriority Any field.

[0193] When the UE is in normal camping state, if it supports slice-based cell reselection and has received the network slice and NSAG information to be used for cell reselection from the NAS, the UE will deduce the reselection priority.

[0194] - The UE can also deduce the reselection priority when SIB16 is not broadcast in the camped cell.

[0195] If UE is in Reside in any cell In this state, the UE should only apply the priority provided by the system information from the current cell, and the UE should retain the priority information provided by the system information from the current cell. RRCRelease Received in deprioritisationReq The priority provided by dedicated signaling, unless otherwise specified. When a UE in normal camping state has only dedicated priorities other than the current frequency, the UE should consider the current frequency as the lowest priority frequency (i.e., lower than any network configuration value). When a UE with HSDN capability is in a high mobility state, the UE will always consider the HSDN cell as the highest priority (i.e., higher than the priority of any other network configuration). When a UE with HSDN capability is not in a high mobility state, the UE will always consider the HSDN cell as the lowest priority (i.e., lower than the priority of any other network configuration). If the UE is configured to perform both NR sidelink communication and V2X sidelink communication, the UE may consider the frequency providing both NR sidelink communication and V2X sidelink communication configurations as the highest priority. If the UE is configured to perform NR sidelink communication but not V2X communication, the UE may consider the frequency providing V2X sidelink communication configuration as the highest priority. If the UE is configured to perform V2X sidelink communication but not NR sidelink communication, the UE may consider the frequency providing V2X sidelink communication configuration as the highest priority.

[0196] The UE will only perform cell reselection assessment for NR frequencies and RAT frequencies that are given in the system information and for which the UE has the provided priority.

[0197] If a UE with MBS broadcast capability is receiving or interested in receiving MBS broadcast services, and can only receive these services via a frequency that provides such services and is residing on it, then the UE can consider that frequency to have the highest priority during an MBS broadcast session if the following two conditions are met: 1) The SIB1 scheduling information of the cell reselected by the UE due to frequency prioritization for MBS includes SIB20; 2) Or: - Indicate one or more MBS FSAIs for that frequency in the SIB21 of the serving cell, and also indicate the same MBS FSAI for the MBS broadcast service in the MBS User Service Description (USD), or - SIB21 is not provided in the serving cell and the frequency is included in the USD of the service, or - SIB21 is provided in the serving cell but not for the relevant service frequency mapping, and the frequency is included in the USD of the service.

[0198] When the USD offers multiple frequencies for services of interest to the UE, the choice of which frequency to use depends on the UE implementation plan.

[0199] If a UE with MBS broadcast capability is receiving or interested in receiving MBS broadcast services, then as long as the SIB1 scheduling information of the cell contains SIB20 on the MBS frequency monitored by the UE and as long as condition 2 above is met for the serving cell, the UE can regard the cell reselection candidate frequency that it cannot receive MBS broadcast services during the MBS broadcast session as having the lowest priority.

[0200] - Exemplary scenarios that may require this de-priority include the following: the UE cannot camp on the MBS broadcast frequency (e.g., the MBS broadcast frequency belongs to a different PLMN than the UE's registered PLMN), but the UE can receive MBS broadcast services when camping on a frequency other than the MBS broadcast frequency or the current frequency.

[0201] Frequency prioritization for MBS broadcast, NR sidelink communication, or V2X sidelink communication can override reselection priorities for slice-based cell reselection.

[0202] When the UE receives a deprioritisationReq of RRCRelease In this case, the UE should transfer the previously received data with... deprioritisationReqof RRCRelease The stored frequency and the current frequency or all frequencies of the NR are considered the lowest priority frequency (i.e., lower than any network configuration value), while the T325 is running, regardless of the RAT. When performing PLMN selection or SNPN selection according to the NAS request, the UE will delete the stored down-priority request.

[0203] - The UE should search for a higher priority stratum for cell reselection as soon as possible after a priority change. The minimum relevant performance requirements still apply.

[0204] - The UE does not consider MBS broadcast, NR sidelink communication, or V2X sidelink communication functions to replace those provided by HSDN or deprioritisationReq Priority of cell reselection caused by request function.

[0205] The UE should remove the priority provided by the dedicated signaling in the following situations: - The UE enters different RRC states; or - The optional validity period for the dedicated priority (T320) has expired; or - UE receives a field that does not exist cellReselectionPriorities of RRCRelease Message; or - Perform PLMN selection or SNPN selection based on NAS request.

[0206] - Equal priority between RATs is not supported.

[0207] The UE should not consider any of the listed excluded cells as candidates for cell reselection.

[0208] If the listed allowed cells are configured, the UE should only consider them as candidates for cell reselection.

[0209] UEs in the RRC_IDLE state should inherit the priority and remaining validity time provided by dedicated signaling (i.e., T320 in NR and E-UTRA) during inter-RAT cell (re)selection (if configured).

[0210] In-frequency and inter-frequency cell reselection criteria for equal priority frequencies

[0211] Cell ranking criteria R for serving cells s and R used for neighboring cells n Defined by the following formula:

[0212] Table 6 shows the parameters used for cell ranking criteria.

[0213] [Table 6]

[0214] The UE will sort all cells that meet the cell selection criterion S.

[0215] Q should be derived meas,n and Q meas,s The R value is calculated using the average RSRP result, and the cells are ranked according to the R criteria specified above.

[0216] Normal stay status

[0217] This state applies to both RRC_IDLE and RRC_INACTIVE states.

[0218] During normal operation, the UE should perform the following tasks: - According to SIB1 The information broadcast in the middle is used to monitor the paging channel of the cell; - Monitor short messages sent via P-RNTI on DCI; - Monitor relevant system information; - Perform necessary measurements for the community reselection assessment process; - Perform the cell reselection evaluation process in the following situations / triggers: 1) Triggered internally by the UE to meet performance requirements; 2) When the information regarding the BCCH used in the cell reselection assessment process has been modified.

[0219] 3) When the network slice and / or NSAG information received from the NAS changes.

[0220] Cell selection during transition to RRC_IDLE or RRC_INACTIVE state

[0221] Received RRCRelease When the message switches the UE to RRC_IDLE or RRC_INACTIVE, the UE should then... redirectedCarrierInfo (If included) RRCRelease (In the message) It attempts to camp on a suitable cell. If the UE cannot find a suitable cell, it is allowed to camp on any suitable cell of the indicated RAT. If RRCRelease The message does not contain redirectedCarrierInfo If no suitable cell is found based on the above, the UE will attempt to select a suitable cell on the NR carrier. If no suitable cell is found, the UE will use the stored information to perform cell selection in order to find a suitable cell to camp on.

[0222] When UE from Reside in any cell When the state transitions to RRC_CONNECTED and then returns to RRC_IDLE, the UE should, according to...redirectedCarrierInfo (If included) RRCRelease (In the message) It attempts to camp on an acceptable cell. If the UE cannot find an acceptable cell, it is allowed to camp on any acceptable cell of the indicated RAT. If RRCRelease The message does not contain redirectedCarrierInfo If no acceptable cell is found based on the above, the UE, not in SNPN access mode, will continue searching for a cell in NR frequency. Any cell selection The search will continue for an acceptable cell in any PLMN under the specified condition. If no acceptable cell is found based on the above, the UE in SNPN access mode will continue searching for cells in PLMN. Any cell selection Acceptable cells for any SNPN state.

[0223] Any cell selection status

[0224] This state applies to the RRC_IDLE and RRC_INACTIVE states. In this state, the UE will perform a cell selection procedure to find a suitable cell. If the cell selection procedure fails to find a suitable cell after a complete scan of all frequency bands and all RATs supported by the UE, the UE not in SNPN access mode will attempt to find an acceptable cell for any PLMN it wants to camp on, trying all RATs supported by the UE, and prioritizing high-quality cells. If the cell selection procedure fails to find a suitable cell after a complete scan of all frequency bands supported by the UE, the UE in SNPN access mode will attempt to find an acceptable cell for any SNPN it wants to camp on.

[0225] UEs not camped on any cell will remain in this state.

[0226] Status of residing in any community

[0227] This state applies only to the RRC_IDLE state. In this state, the UE should perform the following tasks: - Monitor short messages sent via P-RNTI on DCI; - Monitor relevant system information; - Perform necessary measurements for the community reselection assessment process; - Perform the cell reselection evaluation process in the following situations / triggers: 1) Triggered internally by the UE to meet performance requirements; 2) When the information regarding the BCCH used in the cell reselection assessment process has been modified.

[0228] - Periodically attempt to find a suitable cell, trying all frequencies of all RATs supported by the UE. If a suitable cell is found, the UE will move to it.Normal residence state.

[0229] - If the UE supports voice services, the UE is not in SNPN access mode, and the current cell does not support fields such as those in SIB1. ims-EmergencySupport If an IMS emergency call is indicated and no suitable cell is found, the UE will perform cell selection / reselection to an acceptable cell that supports emergency calls in any supported RAT, regardless of the priority provided in the system information from the current cell.

[0230] - If the UE supports voice services, the UE is in SNPN access mode, and the current cell does not support fields such as those in SIB1. imsEmergencySupportForSNPN If an IMS emergency call is indicated for any SNPN and no suitable cell is found, the UE will perform cell selection / reselection to an acceptable cell of any available SNPN that supports emergency calls.

[0231] Meanwhile, UEs in RRC_IDLE / INACTIVE autonomously select the target cell to camp on based on measurement results. The network can control the mobility of UEs in RRC_IDLE / INACTIVE by setting system information and transmitting frequency priority, but it cannot be configured individually for each UE.

[0232] Although frequency priority can be provided via dedicated signaling, it also has the limitation that it cannot be updated when the UE is in RRC_IDLE / INACTIVE.

[0233] Therefore, it is necessary to study cell reselection based on the stored configuration.

[0234] In the following description, a method for cell reselection based on stored configurations according to some embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0235] The following figures were created to illustrate specific embodiments of this disclosure. The names of specific devices or signals / messages / fields shown in the figures are provided by way of example, and therefore the technical features of this disclosure are not limited to the specific names used in the following figures. Here, a wireless device may be referred to as a user equipment (UE).

[0236] Figure 10 Examples of methods for cell reselection based on stored configurations, according to some embodiments of the present disclosure, are shown.

[0237] Specifically, Figure 10 An example of a method performed by a wireless device in a wireless communication system is shown.

[0238] In step S1001, the wireless device may receive a conditional mobility configuration from the network, which includes information about the execution conditions associated with the target cell.

[0239] For example, conditional mobility configuration may include information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

[0240] For example, execution conditions related to the target cell can be configured for conditional mobility in the RRC_CONNECTED state. For example, based on the fulfillment of execution conditions, the radio device can execute conditional mobility while in the RRC_CONNECTED state.

[0241] For example, conditional mobility may include at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility (LTM).

[0242] For example, conditional mobility configuration can be sent via system information messages or RRC release messages.

[0243] In step S1002, the wireless device may enter the Radio Resource Control (RRC) _IDLE state or the RRC _INACTIVE state.

[0244] For example, a radio device can select a serving cell when entering the RRC_IDLE or RRC_INACTIVE state. When entering the RRC_IDLE or RRC_INACTIVE state, the radio device can camp on the serving cell.

[0245] For example, the execution conditions related to the target cell may include conditions related to the measurement results for the target cell. For instance, conditions related to the measurement results for the target cell may be satisfied when the measurement results for the target cell are equal to or greater than a threshold and / or the measurement results for the serving cell.

[0246] For example, the measurement results may include measurements of reference signal received power (RSRP), reference signal received quality (RSRQ), and / or signal-to-interference-plus-noise ratio (SINR).

[0247] In step S1003, the wireless device may assess whether the execution conditions related to the target cell are met.

[0248] For example, when in the RRC_IDLE or RRC_INACTIVE state, the wireless device can assess whether the execution conditions related to the target cell are met.

[0249] According to some embodiments of this disclosure, the wireless device can receive a first indicator from the network, which indicates whether the conditional mobility configuration is valid in the RRC_IDLE or RRC_INACTIVE state. Based on the first indicator, the wireless device can determine whether the conditional mobility configuration is valid or invalid in the RRC_IDLE or RRC_INACTIVE state.

[0250] For example, when in the RRC_IDLE or RRC_INACTIVE state, the wireless device can evaluate the execution conditions included in the conditional mobility configuration based on whether the conditional mobility configuration is valid. If the conditional mobility configuration is not valid, the wireless device may not evaluate the execution conditions included in the conditional mobility configuration when in the RRC_IDLE or RRC_INACTIVE state.

[0251] According to some embodiments of this disclosure, the wireless device can receive a second indicator from the network, which indicates whether to evaluate execution conditions related to the target cell in the RRC_IDLE or RRC_INACTIVE state. That is, the second indicator can indicate whether each execution condition is valid in the RRC_IDLE or RRC_INACTIVE state.

[0252] For example, conditional mobility configuration may include a first execution condition and a second execution condition for the target cell. A second indicator may indicate that the first execution condition is valid and the second condition is invalid when in the RRC_IDLE or RRC_INACTIVE state. When in the RRC_IDLE or RRC_INACTIVE state, the radio device may evaluate only the first execution condition for the target cell.

[0253] According to some embodiments of this disclosure, the wireless device can evaluate execution conditions only when the conditional mobility configuration is valid.

[0254] For example, a wireless device can start a validity timer when entering the RRC_IDLE or RRC_INACTIVE state. The wireless device can consider the conditional mobility configuration to be valid in the RRC_IDLE or RRC_INACTIVE state only while the validity timer is running. Upon expiration of the validity timer, the wireless device can consider the conditional mobility configuration to be invalid in the RRC_IDLE or RRC_INACTIVE state.

[0255] For example, based on the fact that the wireless device is in a valid region, the wireless device may consider the conditional mobility configuration to be valid in the RRC_IDLE or RRC_INACTIVE state. For example, the wireless device may receive information related to the valid region from the network. For example, the valid region may be associated with each conditional mobility configuration.

[0256] In step S1004, the wireless device may reselect the target cell based on the fulfillment of the execution conditions.

[0257] For example, a wireless device can reside on a target cell.

[0258] For example, when in the RRC_IDLE or RRC_INACTIVE state, the radio device can perform conditional cell reselection by selecting a target cell based on the conditional mobility configuration. For example, when in the RRC_IDLE or RRC_INACTIVE state, the radio device can perform conditional cell reselection by selecting a target cell based on the fulfillment of execution conditions.

[0259] According to some embodiments of this disclosure, a wireless device may (i) perform a conditional cell reselection process based on a conditional mobility configuration and / or (ii) perform a cell reselection process (e.g., a normal cell reselection process) based on cell reselection criteria.

[0260] For example, a radio device may perform only one of the following: (i) a conditional cell reselection procedure and (ii) a normal cell reselection procedure. A radio device may perform a normal cell reselection procedure based on cell reselection criteria only when the conditional mobility configuration is not valid. When the conditional mobility configuration is valid, the radio device may perform a conditional cell reselection procedure.

[0261] For example, a wireless device can simultaneously perform (i) a conditional cell reselection process and (ii) a normal cell reselection process. For instance, the wireless device can evaluate cell reselection criteria for normal cell reselection and execution conditions for the conditional cell reselection process. In other words, the wireless device can perform the cell reselection process based on cell reselection criteria, while simultaneously evaluating execution conditions related to the target cell.

[0262] According to some embodiments of this disclosure, the wireless device can communicate with at least one of a user device, a network, or an autonomous vehicle, other than the wireless device itself.

[0263] The technical features of cell reselection based on the stored configuration are described below.

[0264] Cell reselection based on pre-configured conditions: If the pre-configured reselection conditions associated with the target cell are met, the UE in RRC_IDLE / INACTIVE performs a cell reselection to the target cell.

[0265] The pre-configured reselection criteria include at least the quality of neighboring cells (=target cell), for example, neighboring cell quality is better than serving cell quality. Neighboring / serving cell quality is a measurement result of neighboring / serving cells, such as RSRP, RSRQ, or SINR.

[0266] More than one pre-configured reselection condition may be associated with the target cell. In this case, if one of the pre-configured reselection conditions associated with the target cell is met, the UE performs cell reselection to the target cell. Alternatively, if all the pre-configured reselection conditions associated with the target cell are met, the UE performs cell reselection to the target cell.

[0267] Information about the target cell and the pre-configured reselection conditions associated with the target cell can be sent via broadcast signaling (e.g., via system information).

[0268] Information about the target cell and the pre-configured reselection conditions associated with the target cell can be sent via dedicated signaling (e.g., via an RRC release message).

[0269] Information about the target cell may include the cell identifier and frequency.

[0270] Reuse the execution conditions for the RRC_CONNECTED mobility configuration: The execution conditions configured for conditional RRC_CONNECTED mobility (e.g., conditional RRC reconfiguration, conditional handover, or conditional LTM) and information about the target cell can be used for cell reselection based on pre-configured conditions.

[0271] If a UE is configured to use a conditional RRC_CONNECTED mobility setting for cell reselection based on pre-configured conditions, the UE uses the execution conditions included in the configuration regarding the conditional RRC_CONNECTED mobility setting as the pre-configured reselection conditions under RRC_IDLE / INACTIVE. That is, if the execution conditions are met, the UE in RRC_IDLE / INACTIVE performs cell reselection to the target cell associated with the execution conditions.

[0272] The first indicator can be configured by the network and is associated with the configuration regarding conditional RRC_CONNECTED mobility.

[0273] If the first indicator exists or is set to the first value, the UE in RRC_IDLE / INACTIVE evaluates the execution conditions associated with the first indicator, and when the execution conditions are met, performs cell reselection to the target cell associated with the execution conditions.

[0274] If the first indicator is absent or set to the second value, the UE in RRC_IDLE / INACTIVE does not evaluate the execution conditions associated with the first indicator.

[0275] The second indicator can be configured by the network, for example, when the RRC connection is released or suspended.

[0276] When the second indicator is used in conjunction with the first indicator, the first indicator indicates whether each configuration for conditional RRC_CONNECTED mobility is valid for cell reselection under RRC_IDLE / INACTIVE.

[0277] If the second indicator exists or is set to the first value, the UE evaluation in RRC_IDLE / INACTIVE includes the execution condition in the valid configuration of the condition RRC_CONNECTED mobility, and when the execution condition is met, cell reselection to the target cell associated with that execution condition is performed.

[0278] If the second indicator is absent or set to the second value, the UE in RRC_IDLE / INACTIVE does not evaluate any execution conditions.

[0279] Validity of conditional cell reselection: The validity timer can be configured based on pre-configured reselection conditions. The UE starts the validity timer when entering RRC_IDLE / INACTIVE, or receives the validity timer from the network. While the validity timer is running, if the pre-configured reselection conditions associated with the validity timer are met, the UE performs cell reselection to the target cell associated with the pre-configured reselection conditions. When the validity timer expires, the UE does not use the corresponding pre-configured reselection conditions for cell reselection.

[0280] The validity area can be configured based on pre-configured reselection conditions. When the UE is within the validity area, if the pre-configured reselection conditions are met, the UE performs cell reselection to the target cell associated with the pre-configured reselection conditions. When the UE is outside the validity area, the UE does not use the corresponding pre-configured reselection conditions for cell reselection.

[0281] If the UE has valid pre-configured reselection conditions, the UE performs an evaluation of the pre-configured reselection conditions, i.e., whether the pre-configured reselection conditions are met.

[0282] Coexistence with traditional neighborhood re-election: Alt1: A UE in RRC_IDLE / INACTIVE state can be in two different states. The first state is a cell reselection state based on pre-configured conditions. In this state, the UE performs cell reselection based on pre-configured conditions, but not normal cell reselection. Normal cell reselection is a cell reselection process performed based on cell ranking criteria and reselection priority. The second state is a normal cell reselection state. In this state, the UE performs normal cell reselection, but not conditional cell reselection.

[0283] The change in a UE's state from RRC_IDLE / INACTIVE depends on the status of the validity timer or validity area configured by the network. If the validity timer is running, or if the UE is within the validity area, the UE is in a cell reselection state based on pre-configured conditions. If the validity timer is not running, or if the UE is outside the validity area, the UE is in a normal cell reselection state.

[0284] Alt2: Even when evaluating pre-configured cell reselection conditions, the UE performs a normal cell reselection process.

[0285] Figure 11 An example of cell reselection based on pre-configured conditions is shown.

[0286] In step S1101, the first UE in RRC_CONNECTED state receives conditional LTM configuration from cell 0. For the LTM target cells (i.e., cell 1 and cell 2), the execution conditions are configured as follows: - Condition #1: The target cell becomes better than the serving cell.

[0287] - Condition #2: The target cell becomes better than the threshold.

[0288] The UE performs the evaluation of conditions #1 and #2 for cell 1 and cell 2 respectively.

[0289] In step S1102, condition #1 is met, that is, the measurement result of cell 1 becomes higher than the measurement result of the serving cell, so the UE performs a handover to cell 1.

[0290] In step S1103, the UE receives an RRC release message with a pending configuration and enters the RRC_INACTIVE state. The RRC release message also indicates that the LTM execution conditions can be used for cell reselection based on pre-configured conditions under RRC_INACTIVE.

[0291] In step S1104, condition #2 is met, that is, the measurement result of cell 2 becomes higher than the threshold, so the UE performs cell reselection to cell 2.

[0292] Figure 12 An example of cell reselection based on pre-configured conditions is shown.

[0293] Specifically, Figure 12 An example of a method performed by a wireless device in a wireless communication system is shown.

[0294] In step S1201, the wireless device may receive a conditional mobility configuration that includes execution conditions and information about a target cell associated with the execution conditions, wherein the execution conditions include at least the target cell quality.

[0295] In step S1202, the wireless device may enter the RRC_IDLE state or the RRC_INACTIVE state.

[0296] In step S1203, the wireless device can assess whether the execution conditions are met.

[0297] In step S1204, if the execution conditions are met, the wireless device can perform cell reselection to the target cell associated with the execution conditions.

[0298] exist Figure 10 , Figure 11 and Figure 12 Some of the detailed steps shown in the examples may not be necessary and can be omitted. Besides... Figure 10 , Figure 11 and Figure 12 In addition to the steps shown, other steps may be added, and the order of the steps may be changed. Some of the steps described above may have their own technical significance.

[0299] In the following sections, an apparatus for performing cell reselection based on stored configurations, according to some embodiments of the present disclosure, will be described. Here, the apparatus may be... Figure 2 , Figure 3 , Figure 5 and Figure 10 Wireless devices (100 or 200) in the middle.

[0300] For example, a wireless device can perform the above method. Detailed explanations that overlap with the above may be simplified or omitted.

[0301] Reference Figure 5 The wireless device 100 may include a processor 102, a memory 104, and a transceiver 106.

[0302] According to some embodiments of this disclosure, processor 102 may be configured to be operatively coupled to memory 104 and transceiver 106.

[0303] For example, a wireless device may include at least one transceiver, at least one processor, and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions that perform operations based on execution by the at least one processor.

[0304] The operation includes: receiving a conditional mobility configuration from the network, including information on execution conditions related to a target cell; entering a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state; evaluating whether the execution conditions related to the target cell are met; and reselecting the target cell based on the met execution conditions.

[0305] For example, the operation also includes selecting a serving cell when entering the RRC_IDLE state or the RRC_INACTIVE state.

[0306] For example, the execution conditions related to the target cell include conditions related to the measurement results of the target cell.

[0307] For example, conditional mobility configuration includes information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

[0308] For example, execution conditions associated with the target cell are configured for conditional mobility in the RRC_CONNECTED state.

[0309] For example, conditional mobility includes at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility (LTM).

[0310] For example, the operation further includes: receiving a first indicator from the network, the first indicator informing whether the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

[0311] For example, the operation further includes: receiving a second indicator from the network, the second indicator indicating whether to evaluate execution conditions related to the target cell when in the RRC_IDLE state or the RRC_INACTIVE state.

[0312] For example, the operation further includes: starting a validity timer when entering the RRC_IDLE state or the RRC_INACTIVE state, wherein the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state when the validity timer is running.

[0313] For example, conditional mobility configuration is valid in the RRC_IDLE or RRC_INACTIVE state, based on the fact that the wireless device is in the valid area.

[0314] For example, the operation further includes performing a cell reselection process based on cell reselection criteria only when the conditional mobility configuration is not valid.

[0315] For example, the operation further includes performing a cell reselection process based on cell reselection criteria when the wireless device evaluates the execution conditions related to the target cell.

[0316] For example, conditional mobility configuration can be sent via system information messages or RRC release messages.

[0317] For example, the processor may be adapted to communicate with at least one of user equipment, a network, or an autonomous vehicle, other than a wireless device.

[0318] In the following, a processor for a wireless device for cell reselection based on a stored configuration, according to some embodiments of the present disclosure, will be described.

[0319] The processor may be adapted to control wireless devices to perform operations.

[0320] The operation includes: receiving a conditional mobility configuration from the network including information on execution conditions associated with a target cell; entering a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state; evaluating whether the execution conditions associated with the target cell are met; and reselecting the target cell based on the satisfaction of the execution conditions.

[0321] For example, the operation also includes selecting a serving cell when entering the RRC_IDLE state or the RRC_INACTIVE state.

[0322] For example, the execution conditions related to the target cell include conditions related to the measurement results of the target cell.

[0323] For example, conditional mobility configuration includes information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

[0324] For example, execution conditions associated with the target cell are configured for conditional mobility in the RRC_CONNECTED state.

[0325] For example, conditional mobility includes at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility (LTM).

[0326] For example, the operation further includes: receiving a first indicator from the network, the first indicator informing whether the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

[0327] For example, the operation further includes: receiving a second indicator from the network, the second indicator indicating whether to evaluate execution conditions related to the target cell when in the RRC_IDLE state or the RRC_INACTIVE state.

[0328] For example, the operation further includes: starting a validity timer when entering the RRC_IDLE state or the RRC_INACTIVE state, wherein the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state when the validity timer is running.

[0329] For example, conditional mobility configuration is valid in the RRC_IDLE or RRC_INACTIVE state, based on the fact that the wireless device is in the valid area.

[0330] For example, the operation further includes performing a cell reselection process based on cell reselection criteria only when the conditional mobility configuration is not valid.

[0331] For example, the operation further includes performing a cell reselection process based on cell reselection criteria when the wireless device evaluates the execution conditions related to the target cell.

[0332] For example, conditional mobility configuration can be sent via system information messages or RRC release messages.

[0333] For example, the processor can be adapted to control the wireless device to communicate with at least one of the following: a user device, a network, or an autonomous vehicle, other than the wireless device.

[0334] In the following, a non-transitory computer-readable medium having stored thereon a plurality of instructions for cell reselection based on the stored configuration, according to some embodiments of the present disclosure, will be described.

[0335] According to some embodiments of this disclosure, the technical features of this disclosure can be directly implemented in hardware, in software executed by a processor, or a combination of both. For example, a method executed by a wireless device in wireless communication can be implemented in hardware, software, firmware, or any combination thereof. For example, software can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other storage medium.

[0336] Some examples of storage media are coupled to a processor, allowing the processor to read information from the storage media. Alternatively, the storage media can be integrated into the processor. The processor and storage media can reside in an ASIC. In another example, the processor and storage media can reside as discrete components.

[0337] Computer-readable media can include tangible and non-transitory computer-readable storage media.

[0338] For example, non-transitory computer-readable media may include random access memory (RAM) such as synchronous dynamic random access memory (SDRAM), read-only memory (ROM), non-volatile random access memory (NVRAM), electrically erasable programmable read-only memory (EEPROM), FLASH memory, magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures. Non-transitory computer-readable media may also include combinations of the above.

[0339] Furthermore, the methods described herein can be implemented at least in part by a computer-readable communication medium that carries or conveys code in the form of instructions or data structures and can be accessed, read, and / or executed by a computer.

[0340] According to some embodiments of this disclosure, a plurality of instructions are stored on a non-transitory computer-readable medium. The stored instructions can be executed by a processor of a wireless device. The stored instructions cause the wireless device to perform operations.

[0341] The operation includes: receiving a conditional mobility configuration from the network, including information on execution conditions associated with a target cell; entering a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state; evaluating whether the execution conditions associated with the target cell are met; and reselecting the target cell based on the satisfaction of the execution conditions.

[0342] For example, the operation also includes selecting a serving cell when entering the RRC_IDLE state or the RRC_INACTIVE state.

[0343] For example, the execution conditions related to the target cell include conditions related to the measurement results of the target cell.

[0344] For example, conditional mobility configuration includes information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

[0345] For example, execution conditions associated with the target cell are configured for conditional mobility in the RRC_CONNECTED state.

[0346] For example, conditional mobility includes at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility (LTM).

[0347] For example, the operation further includes: receiving a first indicator from the network, the first indicator informing whether the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

[0348] For example, the operation further includes: receiving a second indicator from the network, the second indicator indicating whether to evaluate execution conditions related to the target cell when in the RRC_IDLE state or the RRC_INACTIVE state.

[0349] For example, the operation further includes: starting a validity timer when entering the RRC_IDLE state or the RRC_INACTIVE state, wherein the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state when the validity timer is running.

[0350] For example, conditional mobility configuration is valid in the RRC_IDLE or RRC_INACTIVE state, based on the fact that the wireless device is in the valid area.

[0351] For example, the operation further includes performing a cell reselection process based on cell reselection criteria only when the conditional mobility configuration is invalid.

[0352] For example, the operation further includes performing a cell reselection process based on cell reselection criteria when the wireless device evaluates the execution conditions related to the target cell.

[0353] For example, conditional mobility configuration can be sent via system information messages or RRC release messages.

[0354] For example, the stored instructions can enable the wireless device to communicate with at least one of a user device, a network, or an autonomous vehicle, other than the wireless device itself.

[0355] In the following, a method for cell reselection based on stored configuration, performed by a base station (BS) according to some embodiments of the present disclosure, will be described.

[0356] The method includes: sending a conditional mobility configuration to a radio device including information on execution conditions associated with a target cell, wherein the radio device enters a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state, wherein the radio device evaluates whether the execution conditions associated with the target cell are met; and wherein the radio device reselects the target cell based on the satisfaction of the execution conditions.

[0357] In the following, a base station (BS) for cell reselection based on a stored configuration, according to some embodiments of the present disclosure, will be described.

[0358] A BS may include a transceiver, a memory, and a processor that is operatively coupled to the transceiver and the memory.

[0359] The processor is adapted to control the transceiver to send a conditional mobility configuration, including information about execution conditions associated with the target cell, to the radio device. The radio device enters a Radio Resource Control (RRC)_IDLE state or an RRC_INACTIVE state. The radio device evaluates whether the execution conditions associated with the target cell are met. The radio device reselects the target cell based on the satisfaction of the execution conditions.

[0360] This disclosure can have various beneficial effects.

[0361] According to some embodiments of this disclosure, a wireless device can effectively perform cell reselection based on stored configurations.

[0362] For example, the network can enhance its ability to control the mobility of wireless devices in RRC_IDLE / INACTIVE and can more actively enable wireless devices to switch to RRC_INACTIVE.

[0363] For example, a wireless device can move to and camp on a cell suitable for the ongoing session that the wireless device has or on a cell suitable for the UE's capabilities.

[0364] For example, by using the CHO setting to perform cell reselection, wireless devices can efficiently perform mobility in inactive or idle states.

[0365] According to some embodiments of this disclosure, a wireless communication system can provide an efficient solution for cell reselection based on stored configurations.

[0366] The beneficial effects that can be obtained through specific embodiments of this disclosure are not limited to those listed above. For example, there may be various technical effects that can be understood and / or deduced from this disclosure by those skilled in the art. Therefore, the specific effects of this disclosure are not limited to those explicitly described herein, but may include various effects that can be understood or deduced from the technical features of this disclosure.

[0367] The claims in this disclosure can be combined in various ways. For example, the technical features in the method claims of this disclosure can be combined to implement or perform in a device, and the technical features in the device claims can be combined to implement or perform in a method. Furthermore, the technical features in the method claims and device claims can be combined to implement or perform in a device. Other implementations are within the scope of the appended claims.

Claims

1. A method, the method comprising: Conditional mobility configuration received from the network by the wireless device, including information about the execution conditions related to the target cell; The wireless device enters the Radio Resource Control (RRC)_IDLE state or the RRC_INACTIVE state. The wireless device evaluates whether the execution conditions related to the target cell are met. as well as The wireless device reselects the target cell based on the fulfillment of the execution conditions.

2. The method according to claim 1, wherein, The method further includes: When entering the RRC_IDLE state or the RRC_INACTIVE state, the wireless device selects the serving cell.

3. The method according to claim 1, in, The execution conditions associated with the target cell include conditions related to the measurement results for the target cell.

4. The method according to claim 1, in, The conditional mobility configuration includes information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

5. The method according to claim 1, in, The execution conditions associated with the target cell are configured for conditional mobility in the RRC_CONNECTED state.

6. The method according to claim 5, in, The conditional mobility includes at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility LTM.

7. The method according to claim 1, wherein, The method further includes: The wireless device receives a first indicator from the network, the first indicator informing whether the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

8. The method according to claim 1, wherein, The method further includes: The wireless device receives a second indicator from the network, the second indicator indicating whether to evaluate the execution conditions related to the target cell when in the RRC_IDLE state or the RRC_INACTIVE state.

9. The method according to claim 1, wherein, The method further includes: Upon entering the RRC_IDLE state or the RRC_INACTIVE state, the wireless device starts a validity timer. Specifically, when the validity timer is running, the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

10. The method according to claim 1, in, The conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state, provided that the wireless device is in a valid region.

11. The method according to claim 1, wherein, The method further includes: The cell reselection process is performed by the radio device based on cell reselection criteria only when the conditional mobility configuration is not valid.

12. The method according to claim 1, wherein, The method further includes: When the wireless device evaluates the execution conditions related to the target cell, the wireless device performs the cell reselection process based on cell reselection criteria.

13. The method according to claim 1, in, The conditional mobility configuration is sent via a system information message or an RRC release message.

14. The method according to claim 1, in, The wireless device communicates with at least one of the following: user equipment, network, or autonomous vehicle, in addition to the wireless device itself.

15. A wireless device, the wireless device comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connectable to the at least one processor and storing instructions that perform operations based on execution by the at least one processor, the operations including: Receive conditional mobility configuration from the network, including information about the execution conditions related to the target cell; Enter Radio Resource Control (RRC) state_IDLE or RRC_INACTIVE; Assess whether the execution conditions associated with the target cell are met; and The target cell is reselected based on the fulfillment of the execution conditions.

16. The wireless device according to claim 15, wherein, The operation also includes: Select a serving cell when entering the RRC_IDLE state or the RRC_INACTIVE state.

17. The wireless device according to claim 15, in, The execution conditions associated with the target cell include conditions related to the measurement results for the target cell.

18. The wireless device according to claim 15, in, The conditional mobility configuration includes information related to the cell identifier of the target cell and information related to one or more frequencies of the target cell.

19. The wireless device according to claim 15, in, The execution conditions associated with the target cell are configured for conditional mobility in the RRC_CONNECTED state.

20. The wireless device according to claim 19, in, The conditional mobility includes at least one of (i) conditional RRC reconfiguration, (ii) conditional switching, and / or (iii) conditional layer-triggered mobility LTM.

21. The wireless device according to claim 15, wherein, The operation also includes: A first indicator is received from the network, which informs whether the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

22. The wireless device according to claim 15, wherein, The operation also includes: A second indicator is received from the network, the second indicator indicating whether to evaluate the execution conditions related to the target cell when in the RRC_IDLE state or the RRC_INACTIVE state.

23. The wireless device according to claim 15, wherein, The operation also includes: A validity timer is started when entering the RRC_IDLE state or the RRC_INACTIVE state. Specifically, when the validity timer is running, the conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state.

24. The wireless device according to claim 15, in, The conditional mobility configuration is valid in the RRC_IDLE state or the RRC_INACTIVE state, provided that the wireless device is in a valid region.

25. The wireless device according to claim 15, wherein, The operation also includes: The cell reselection process is performed only when the conditional mobility configuration is not valid, based on the cell reselection criteria.

26. The wireless device according to claim 15, wherein, The operation also includes: When the wireless device evaluates the execution conditions related to the target cell, it performs a cell reselection process based on cell reselection criteria.

27. The wireless device according to claim 15, in, The conditional mobility configuration is sent via a system information message or an RRC release message.

28. The wireless device according to claim 15, in, The wireless device communicates with at least one of the following: user equipment, network, or autonomous vehicle, in addition to the wireless device itself.

29. A processor for a wireless device in a wireless communication system, wherein, The processor is adapted to control the wireless device to perform operations, including: Receive conditional mobility configuration from the network, including information about the execution conditions related to the target cell; Enter Radio Resource Control (RRC) state_IDLE or RRC_INACTIVE; Assess whether the execution conditions associated with the target cell are met; and The target cell is reselected based on the fulfillment of the execution conditions.

30. A non-transitory computer-readable medium storing a plurality of instructions, which, when executed by a processor of a wireless device, cause the wireless device to perform operations, the operations including: Receive conditional mobility configuration from the network, including information about the execution conditions related to the target cell; Enter Radio Resource Control (RRC) state_IDLE or RRC_INACTIVE; Assess whether the execution conditions associated with the target cell are met; and The target cell is reselected based on the fulfillment of the execution conditions.

31. A method comprising: The base station sends a conditional mobility configuration, including information about the execution conditions related to the target cell, to the wireless device. The wireless device enters either the Radio Resource Control (RRC)_IDLE state or the RRC_INACTIVE state. The wireless device evaluates whether the execution conditions related to the target cell are met; and The wireless device reselects the target cell based on the fulfillment of the execution conditions.

32. A base station, the base station comprising: transceiver; Memory; as well as At least one processor, operatively coupled to the transceiver and the memory, and adapted to: Send a conditional mobility configuration, including information about the execution conditions related to the target cell, to the wireless device; The wireless device enters either the Radio Resource Control (RRC)_IDLE state or the RRC_INACTIVE state. The wireless device evaluates whether the execution conditions related to the target cell are met; and The wireless device reselects the target cell based on the fulfillment of the execution conditions.

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