Method and apparatus for high-based mobility in wireless communication system

Abstract

Methods and apparatus for height-based mobility in a wireless communication system are provided. The wireless device receives information about a mobility configuration associated with the altitude range; a current height of the wireless device is monitored. Based on the current height of the wireless device being within the height range, the wireless device evaluates at least one condition for mobility based on the mobility configuration. The wireless device performs a movement to a target cell among the one or more candidate target cells based on the evaluation. The mobility configuration includes information about one or more candidate target cells.

Description

Technical Field

[0001] The present disclosure relates to methods and apparatus for altitude-based mobility in a wireless communication system. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology that allows high-speed packet communications. Many solutions have been proposed for the LTE goal, including those aimed at reducing user and supplier costs, improving service quality, and expanding and improving coverage and system capacity. As upper layer requirements, 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of frequency bands, simple structure, open interfaces, and appropriate power consumption of terminals.

[0003] The International Telecommunication Union (ITU) and 3GPP have begun work on developing requirements and specifications for New Radio (NR) systems. 3GPP must identify and develop the technical components required for successful standardization of new RATs that will meet both urgent market needs and longer-term requirements set forth by the ITU Radiocommunication Sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process in a timely manner. In addition, NR should be able to use any spectrum band up to at least the 100 GHz range that can be used for wireless communications even in the more distant future.

[0004] The goal of NR is to be 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), etc. NR should be inherently forward compatible. Summary of the invention

[0005] Technical issues

[0006] As the altitude of aerial UEs increases, they experience line-of-sight propagation conditions to more cells, making distant cells more visible to them. As a result, aerial UEs will receive interference from more cells in the downlink and cause interference to more cells in the uplink. In addition, aerial coverage becomes segmented at higher altitudes. Typically, when the main lobe points to the ground, the ground UE is served by the nearest network. In contrast, aerial UEs are served by side lobes of neighboring networks that are located far away from the aerial UE. Therefore, a distant network may become the serving network, and the cell coverage may not be continuous.

[0007] When an aerial UE flies across multiple cells at a specific altitude and direction, the quality of its serving cell will fluctuate at a specific frequency based on network evaluation. An aerial UE can see multiple cells with similar signal strengths, which makes it difficult to select a suitable cell based solely on cell quality (such as RSRP and RSRQ). Especially in the case of conditional mobility (such as conditional handover (CHO) and conditional PSCell addition / change (CPAC)), if an aerial UE detects more neighbor cells, the UE may perform cell changes more frequently. This results in more signaling overhead for air interference, and the network may perform more handover preparations for neighbor cells for CHO / CPAC.

[0008] Therefore, there is a need for research on height-based mobility in wireless communication systems.

[0009] Technical Solution

[0010] In one aspect, a method performed by a wireless device in a wireless communication system is provided. The method includes the following steps: receiving information about a mobility configuration associated with an altitude range; monitoring a current altitude of the wireless device; evaluating at least one condition for mobility based on the mobility configuration within the altitude range based on the current altitude of the wireless device; and performing mobility to a target cell among one or more candidate target cells based on the evaluation, wherein the mobility configuration includes information about the one or more candidate target cells.

[0011] In another aspect, a device for implementing the above method is provided.

[0012] Beneficial Effects

[0013] The present disclosure may have various beneficial effects.

[0014] According to some embodiments of the present disclosure, a wireless device may efficiently perform conditional mobility according to an altitude-based mobility configuration.

[0015] For example, depending on the UE's altitude, the UE may perform reselection to a suitable cell (eg, a UAV-specific cell or a nearby cell) or perform conditional mobility to a suitable cell.

[0016] In other words, the UE may reselect a suitable cell (eg, a UAV-specific cell or a nearby cell) or perform conditional mobility to the suitable cell according to the altitude.

[0017] For example, by selecting candidate target cells based on the height of the wireless device, it can perform efficient mobility (eg, CHO and / or CPAC).

[0018] For example, the wireless device may save resources by preventing mobility to unsuitable cells.

[0019] According to some embodiments of the present disclosure, a wireless network system may provide an efficient solution for altitude-based mobility.

[0020] The advantageous effects that can be obtained by the specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be various technical effects that a person of ordinary skill in the relevant field can understand and / or derive from the present disclosure. Therefore, the specific effects of the present 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 the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0022] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0023] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0024] Figure 4 Another example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0025] Figure 5 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0026] Figure 6 and Figure 7 An example of a protocol stack in a 3GPP-based wireless communication system to which an implementation of the present disclosure is applied is shown.

[0027] Figure 8 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0028] Fig. 9 An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0029] Fig.10 An example of a method for altitude-based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0030] Fig.11 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0031] Fig.12 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0032] Fig.13 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0033] Fig.14 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0034] Fig.15 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0035] Fig.16 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0036] Fig.17 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0037] Fig.18 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0038] Fig.19 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0039] Fig. 20 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0040] Fig.21 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0041] Fig. 22 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0042] Fig.23 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0043] Fig.24An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0044] Fig.25 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0045] Fig.26 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0046] Fig. 27 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0047] Fig.28 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0048] Fig.29 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0049] Fig.30 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0050] Fig.31 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0051] Fig.32 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0052] Fig.33 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0053] Fig.34 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0054] Fig.35 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0055] Fig.36An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0056] Fig.37 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0057] The following techniques, devices and systems can be applied to various 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 by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE adopts OFDMA in DL and SC-FDMA in UL. LTE-Advanced (LTE-A) is an evolved version of 3GPP LTE.

[0058] For ease of description, the implementation of the present disclosure is mainly described with respect to a 3GPP-based wireless communication system. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP-based wireless communication system, aspects of the present disclosure that are not limited to a 3GPP-based wireless communication system are applicable to other mobile communication systems.

[0059] For terms and techniques not specifically described in the terms and techniques adopted in the present disclosure, reference may be made to wireless communication standard documents issued prior to the present disclosure.

[0060] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0061] In the present disclosure, a slash ( / ) or a comma (,) may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0062] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, the expression "at least one of A or B" or "at least one of A and / or B" in the present disclosure may be interpreted as being the same as "at least one of A and B".

[0063] In addition, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "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".

[0064] In addition, the brackets used in the present disclosure may mean "for example". In detail, when it is shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, in the present disclosure, "control information" is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when it is shown as "control information (ie, PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0065] The technical features described separately in one figure in the present disclosure can be implemented separately or simultaneously.

[0066] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods and / or operational flowcharts of the present disclosure disclosed herein may be applied to various fields requiring wireless communication and / or connection between devices (e.g., 5G).

[0067] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings. Unless otherwise specified, the same reference numerals in the following drawings and / or descriptions may refer to the same and / or corresponding hardware blocks, software blocks and / or functional blocks.

[0068] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0069] exist Figure 1 The 5G usage scenarios shown in the present disclosure are only exemplary, and the technical features of the present disclosure may be applied to Figure 1 Other 5G usage scenarios shown in .

[0070] The three main demand categories for 5G include: (1) enhanced mobile broadband (eMBB) category, (2) massive machine type communication (mMTC) category, and (3) ultra-reliable and low-latency communication (URLLC) category.

[0071] Some use cases may require multiple categories for optimization, and other use cases may focus on only one key performance indicator (KPI). 5G supports such various use cases using a flexible and reliable approach.

[0072] eMBB goes far beyond basic mobile Internet access and covers rich two-way work and media and entertainment applications in the cloud and augmented reality. Data is one of the core driving forces of 5G, and in the 5G era, dedicated voice services may not be provided for the first time. In 5G, it is expected that voice will be simply processed as an application using a data connection provided by the communication system. The main reason for increasing business capacity is due to the increase in content size and the increase in the number of applications requiring high data transfer rates. As more and more devices are connected to the Internet, streaming services (audio and video), conversational video, and mobile Internet access will be more widely used. Many of these applications require a connection that is always on in order 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 that accelerates the growth of uplink data transfer rates. 5G is also used for remote work in the cloud. When using a tactile interface, 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 that increases the demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere including high mobility environments such as trains, vehicles and airplanes. Other use cases are augmented reality for entertainment and information search. In this case, augmented reality requires very low latency and instantaneous data capacity.

[0073] Additionally, one of the most anticipated 5G use cases involves the ability to smoothly connect embedded sensors in all fields, i.e., mMTC. It is expected that the number of potential Internet of Things (IoT) devices will reach 204 billion by 2020. Industrial IoT is one of the categories that performs a major role in enabling smart cities, asset tracking, smart utilities, agriculture, and security infrastructure through 5G.

[0074] URLLC includes remote control and ultra-reliable / available low-latency links over the main infrastructure that will transform new services in industry (such as autonomous vehicles). The level of reliability and latency is necessary to control smart grids, automate industry, enable robotics, and control and adjust drones.

[0075] 5G is a means of providing streams estimated to be hundreds of megabits per second to gigabits per second, and can complement fiber to the home (FTTH) and cable-based broadband (or DOCSIS). Such fast speeds are needed to deliver TV at a resolution of 4K or more (6K, 8K and more), as well as virtual reality and augmented reality. Virtual reality (VR) and augmented reality (AR) applications include almost immersive sports games. Specific applications may require special network configurations. For example, for VR games, game companies need to merge core servers into the network operator's edge network servers to minimize latency.

[0076] It is expected that cars, together with many use cases for mobile communications for vehicles, are new and important motivating forces in 5G. For example, the entertainment of passengers requires high simultaneous capacity and mobile broadband with high mobility. This is because future users continue to expect high-quality connections, regardless of their location and speed. Another use case in the automotive field is the AR dashboard. The AR dashboard enables the driver to identify objects in the dark in addition to the objects seen from the front window, and displays the distance to the object and the movement of the object by overlapping the information told by the driver. In the future, the wireless module realizes the communication between vehicles, the information exchange between the vehicle and the supporting infrastructure, and the information exchange between the vehicle and other connected devices (e.g., devices accompanied by pedestrians). The safety system guides the alternative route of the behavior so that the driver can drive more safely, thereby 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 the driver will only focus on abnormal traffic that the vehicle cannot recognize. The technical requirements of self-driving vehicles require ultra-low latency and ultra-high reliability, so that traffic safety is increased to a level that cannot be achieved by humans.

[0077] Smart cities and smart homes / buildings, referred to as smart societies, will be embedded in high-density wireless sensor networks. Distributed networks of smart sensors will identify conditions for cost and energy efficient maintenance of cities or homes. Similar configurations can be performed for corresponding homes. All temperature sensors, window and heating controllers, burglar alarms and home appliances are wirelessly connected. Many of these sensors are typically low in data transfer rate, power and cost. However, certain types of devices may require real-time HD video to perform monitoring.

[0078] The consumption and distribution of energy, including heat or gas, is distributed at a higher level, making it necessary to automatically control the distribution sensor network. Smart grids collect information and use digital information and communication technologies to connect sensors to each other, so as to act according to the collected information. Since this information can include the behavior of supply companies and consumers, smart grids can improve the distribution of fuels such as electricity by methods with efficiency, reliability, economic feasibility, production sustainability and automation. Smart grids can also be considered as another sensor network with low latency.

[0079] Mission-critical applications (e.g., e-health) are one of the 5G use cases. The health section includes many applications that can enjoy the benefits of mobile communications. Communication systems can support telemedicine that provides clinical treatment in remote locations. Telemedicine can help reduce barriers to distance and improve access to medical services that are not continuously available in remote rural areas. Telemedicine is also used to perform important treatments and save lives in emergency situations. Wireless sensor networks based on mobile communications can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

[0080] Wireless and mobile communications are becoming increasingly important in the field of industrial applications. Cabling is expensive in terms of installation and maintenance. Therefore, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity in many industrial fields. However, in order to achieve this replacement, wireless connections need to be established with latency, reliability and capacity similar to cables, and the management of wireless connections needs to be simplified. When it comes to connecting to 5G, low latency and very low error probability are new requirements.

[0081] Logistics and freight tracking are important use cases for mobile communications, which allow inventory and packages to be tracked anywhere using location-based information systems. The use cases for logistics and freight tracking typically require low data rates but require location information with wide range and reliability.

[0082] Reference Figure 1 , the communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Figure 1 A 5G network is illustrated as an example of a network of the communication system 1, but implementations of the present disclosure are not limited to the 5G system and may be applied to future communication systems other than the 5G system.

[0083] BS 200 and network 300 may be implemented as wireless devices, and a specific wireless device may operate as a BS / network node relative to other wireless devices.

[0084] The wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or LTE), and may be referred to as communication / wireless / 5G devices. The wireless devices 100a to 100f may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing communication between vehicles. A vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an AR / VR / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart tablets, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters.

[0085] In the present disclosure, the wireless devices 100a to 100f may be referred to as user equipment (UE). For example, the UE may include a cellular phone, a smart phone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a plate-shaped personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle with an autonomous driving function, a connected car, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a Fintech device (or a financial device), a security device, a weather / environmental device, a device related to 5G services, or a device related to the fourth industrial evolution field.

[0086] A UAV may be, for example, an aerial vehicle that is piloted by wireless control signals without a human on board.

[0087] VR devices may include, for example, devices for realizing objects or backgrounds of a virtual world. AR devices may include, for example, devices realized by connecting objects or backgrounds of a virtual world to objects or backgrounds of a real world. MR devices may include, for example, devices realized by merging objects or backgrounds of a virtual world into objects or backgrounds of a real world. Hologram devices may include, for example, devices for realizing a 360-degree stereoscopic image by recording and reproducing stereoscopic information, which uses the interference phenomenon of light generated when two lasers meet, which is called holographic imaging.

[0088] Public safety devices may include, for example, image relay devices or image devices wearable on a user's body.

[0089] MTC devices and IoT devices may be devices that do not require direct human intervention or manipulation, for example. For example, MTC devices and IoT devices may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0090] The medical device may be, for example, a device for the purpose of diagnosing, treating, alleviating, curing or preventing a disease. For example, the medical device may be a device for the purpose of diagnosing, treating, alleviating or correcting an injury or harm. For example, the medical device may be a device for the purpose of inspecting, replacing or modifying a structure or function. For example, the medical device may be a device for the purpose of regulating pregnancy. For example, the medical device may include a device for treatment, a device for operation, a device for (in vitro) diagnosis, a hearing aid or a device for surgery.

[0091] The safety device may be, for example, a device installed to prevent possible danger and maintain safety. For example, the safety device may be a camera, a closed-circuit TV (CCTV), a recorder, or a black box.

[0092] Fintech devices may be devices that can provide financial services such as mobile payments, for example. For example, Fintech devices may include payment devices or point-of-sale (POS) systems.

[0093] Weather / environmental devices may include, for example, devices for monitoring or predicting weather / environmental conditions.

[0094] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, and a super 5G network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS 200 / network 300. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0095] Wireless communication / connection 150a, 150b, and 150c may be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS200 and / or between BS200. In this document, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication (or device-to-device (D2D) communication) 150b, inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)), etc. Wireless devices 100a to 100f and BS200 / wireless devices 100a to 100f may send / receive radio signals to each other through wireless communication / connection 150a, 150b, and 150c. For example, wireless communication / connection 150a, 150b, and 150c may send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0096] Here, the radio communication technology implemented in the wireless device in the present disclosure may include narrowband Internet of Things (NB-IoT) technology 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, which may be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present 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 as 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 above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN considered as low-power communication, and may not be limited to the above names. For example, ZigBee technology may generate a personal area network (PAN) associated with small / low-power digital communication based on various specifications such as IEEE802.15.4, and may be referred to as various names.

[0097] Figure 2An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0098] Reference Figure 2 , the first wireless device 100 and the second wireless device 200 can transmit / receive radio signals to / from an external device through various RATs (eg, LTE and NR). Figure 2 In the example, {the first wireless device 100 and the second wireless device 200} may correspond to the attached Figure 1 At least one of {wireless devices 100a to 100f and BS200}, {wireless devices 100a to 100f and wireless devices 100a to 100f} and / or {BS200 and BS200}.

[0099] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in the present disclosure. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in the present disclosure. In this document, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each of the transceivers 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, the first wireless device 100 may represent a communication modem / circuit / chip.

[0100] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in the present disclosure. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts described in the present disclosure. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each of the transceivers 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0101] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). According to the description, function, process, suggestion, method, and / or operation flowchart disclosed in the present disclosure, one or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs). One or more processors 102 and 202 may generate messages, control information, data, or information according to the description, function, process, suggestion, method, and / or operation flowchart disclosed in the present disclosure. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, function, process, suggestion, method, and / or operational flowchart disclosed in the present disclosure, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, function, process, suggestion, method, and / or operational flowchart disclosed in the present disclosure.

[0102] 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 operational flow charts disclosed in the present 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 execute the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present 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 operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of codes, commands and / or command sets.

[0103] 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, codes, instructions, and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of 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 by various technologies such as wired or wireless connections.

[0104] One or more transceivers 106 and 206 can send user data, control information and / or radio signals / channels mentioned in the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure to one or more other devices. One or more transceivers 106 and 206 can receive user data, control information and / or radio signals / channels mentioned in the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106 and 206 can be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can receive user data, control information or radio signals from one or more other devices.

[0105] 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 operational flow charts disclosed in the present disclosure through one or more antennas 108 and 208. In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0106] One or more transceivers 106 and 206 can convert the received radio signal / channel, etc. from the RF band signal to the baseband signal in order to process the received user data, control information, radio signal / channel, etc. One or more transceivers 106 and 206 can convert the user data, control information, radio signal / channel, etc. processed by one or more processors 102 and 202 from the baseband signal to the RF band signal. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, transceivers 106 and 206 can up-convert the OFDM baseband signal to the carrier frequency through their (analog) oscillators and / or filters under the control of processors 102 and 202, and send the up-converted OFDM signal of the carrier frequency. Transceivers 106 and 206 can receive the OFDM signal of the carrier frequency, and down-convert the OFDM signal to the OFDM baseband signal through their (analog) oscillators and / or filters under the control of processors 102 and 202.

[0107] In an implementation of the present disclosure, a UE may operate as a transmitting device in an uplink (UL) and as a receiving device in a downlink (DL). In an implementation of the present disclosure, a BS may operate as a receiving device in an UL and as a transmitting device in a DL. Hereinafter, for the convenience of description, it is mainly assumed that the first wireless device 100 acts as a UE and the second wireless device 200 acts as a BS. For example, a processor 102 connected to the first wireless device 100, installed on the first wireless device 100, or started in the first wireless device 100 may be configured to perform UE behavior according to an implementation of the present disclosure, or control the transceiver 106 to perform UE behavior according to an implementation of the present disclosure. A processor 202 connected to the second wireless device 200, installed on the second wireless device 200, or started in the second wireless device 200 may be configured to perform BS behavior according to an implementation of the present disclosure, or control the transceiver 206 to perform BS behavior according to an implementation of the present disclosure.

[0108] In the present disclosure, the BS is also referred to as a Node B (NB), an eNodeB (eNB) or a gNB.

[0109] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0110] The wireless device may be implemented in various forms depending on the use case / service (see Figure 1 ).

[0111] Reference Figure 3 , the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 of the present invention may be configured by 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, the transceiver 114 may include Figure 2 One or more transceivers 106 and 206 and / or Figure 2The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of each of the wireless devices 100 and 200. For example, the control unit 120 may control the electrical / mechanical operation of each of the wireless devices 100 and 200 based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface via the communication unit 110, or store information received from the outside (e.g., other communication devices) through a wireless / wired interface in the memory unit 130 via the communication unit 110.

[0112] The additional component 140 may be configured differently depending on the type of the wireless device 100 and 200. For example, the additional 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 driving unit, and a computing unit. The wireless device 100 and 200 may be in the form of, but not limited to, a robot ( Figure 1 100a), vehicles ( Figure 1 100b-1 and 100b-2), XR devices ( Figure 1 100c), handheld device ( Figure 1 100d), household appliances ( Figure 1 100e), IoT devices ( Figure 1 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, Fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 1 400), BSS( Figure 1 The wireless devices 100 and 200 may be implemented in the form of a wireless device 200 , a network node, etc. The wireless devices 100 and 200 may be used in a mobile or fixed location depending on the usage example / service.

[0113] exist Figure 3In the wireless devices 100 and 200, the entirety of the various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least a portion thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected by wire, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. Each element, component, unit / part and / or module within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a group of one or more processors. As an example, the 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, the memory unit 130 may be configured by RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0114] Figure 4 Another example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0115] Reference Figure 4 , the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 may be configured by various elements, components, units / portions and / or modules.

[0116] The first wireless device 100 may include at least one transceiver such as a transceiver 106, and at least one processing chip such as a processing chip 101. The processing chip 101 may include at least one processor such as a processor 102 and at least one memory such as a memory 104. The memory 104 may be operably connected to the processor 102. The memory 104 may store various types of information and / or instructions. The memory 104 may store software code 105, which implements instructions for executing the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure when executed by the processor 102. For example, the software code 105 may implement instructions for executing the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure when executed by the processor 102. For example, the software code 105 may control the processor 102 to execute one or more protocols. For example, the software code 105 may control the processor 102 to execute one or more layers of the radio interface protocol.

[0117] The second wireless device 200 may include at least one transceiver such as the transceiver 206 and at least one processing chip such as the processing chip 201. The processing chip 201 may include at least one processor such as the processor 202 and at least one memory such as the memory 204. The memory 204 may be operably connected to the processor 202. The memory 204 may store various types of information and / or instructions. The memory 204 may store software code 205, which implements instructions for executing the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure when executed by the processor 202. For example, the software code 205 may implement instructions for executing the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure when executed by the processor 202. For example, the software code 205 may control the processor 202 to execute one or more protocols. For example, the software code 205 may control the processor 202 to execute one or more layers of the wireless interface protocol.

[0118] Figure 5 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0119] Reference Figure 5 , UE 100 may correspond to the attached Figure 2 The first wireless device 100 and / or Figure 4 A first wireless device 100 is provided.

[0120] 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 keypad 116 , a subscriber identity module (SIM) card 118 , a speaker 120 , and a microphone 122 .

[0121] The processor 102 may be configured to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in the present disclosure. The processor 102 may be configured to control one or more other components of the UE 100 to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in the present disclosure. The layers of the radio interface protocol may be implemented in the processor 102. The processor 102 may include an ASIC, other chipsets, logic circuits and / or data processing devices. The processor 102 may be an application processor. The processor 102 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem (modulator and demodulator). Examples of the processor 102 can be found at MANUFACTURED BY SNAPDRAGON TM Series processors, Manufactured by EXYNOSTM Series processors, A series processors manufactured by Made by HELIO TM Series processors, ATOM manufactured TM series processors or corresponding to the next generation processors.

[0122] The memory 104 is operatively coupled to the processor 102 and stores a variety of information to operate the processor 102. The memory 104 may include ROM, RAM, flash memory, memory card, storage medium, and / or other storage devices. When the embodiment is implemented in software, the techniques described herein may be implemented with modules (e.g., processes, functions, etc.) that execute the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. The modules may be stored in the memory 104 and executed by the processor 102. The memory 104 may be implemented within the processor 102 or outside the processor 102, in which case the memory 104 may be communicatively coupled to the processor 102 via various means known in the art.

[0123] The transceiver 106 is operatively coupled to the processor 102 and transmits and / or receives radio signals. The transceiver 106 includes a transmitter and a receiver. The transceiver 106 may include a baseband circuit for processing radio frequency signals. The transceiver 106 controls one or more antennas 108 to transmit and / or receive radio signals.

[0124] The power management module 110 manages power to the processor 102 and / or the transceiver 106. The battery 112 provides power to the power management module 110.

[0125] The display 114 outputs the result processed by the processor 102. The keypad 116 receives input to be used by the processor 102. The keypad 116 may be displayed on the display 114.

[0126] The SIM card 118 is an integrated circuit designed to securely store an International Mobile Subscriber Identity (IMSI) number and its associated keys, which are used to identify and authenticate subscribers on mobile telephony devices such as mobile phones and computers. Contact information can also be stored on many SIM cards.

[0127] Speaker 120 outputs sound related results processed by processor 102. Microphone 122 receives sound related input to be used by processor 102.

[0128] Figure 6 and Figure 7 An example of a protocol stack in a 3GPP-based wireless communication system to which an implementation of the present disclosure is applied is shown.

[0129] Specifically, Figure 6 An example of a radio interface user plane protocol stack between a UE and a 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 a path through which control messages for managing calls made between a UE and a network are transmitted. The user plane refers to a path through which data generated in an application layer (e.g., voice data or Internet packet data) is transmitted. Figure 6 , the user plane protocol stack can be divided into layer 1 (ie, PHY layer) and layer 2. Figure 7 , the control plane protocol stack can be divided into layer 1 (ie, PHY layer), layer 2, layer 3 (eg, RRC layer), and non-access stratum (NAS) layer. Layer 1, layer 2, and layer 3 are called access stratum (AS).

[0130] In the 3GPP LTE system, Layer 2 is separated into the following sublayers: MAC, RLC, and PDCP. In the 3GPP NR system, 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) flows to the 5G core network.

[0131] 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 transport blocks (TBs) delivered to / from the physical layer on the transport channel; scheduling information reporting; error correction through hybrid automatic repeat request (HARQ) (one HARQ entity per cell in the case of carrier aggregation (CA); priority handling between UEs through dynamic scheduling; priority handling between logical channels of one UE through logical channel prioritization; padding. A single MAC entity can support multiple parameter sets, transmission timings, and cells. The mapping restrictions in the logical channel prioritization control which parameter set(s), cell, and transmission timing can be used by the logical channel.

[0132] MAC provides different kinds of data transmission services. In order to accommodate different kinds of data transmission services, multiple types of logical channels are defined, that is, each logical channel supports the transmission of a specific type of information. Each logical channel type is defined by what type of information is transmitted. Logical channels are divided into two groups: control channels and traffic channels. Control channels are used only for the transmission of control plane information, and traffic channels are used only for the transmission of user plane information. The broadcast control channel (BCCH) is a downlink logical channel for broadcasting system control information, the paging control channel (PCCH) is a downlink logical channel for transmitting paging information, system information change notifications, and indications of ongoing public warning services (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 that do not have an RRC connection with the network, and the dedicated control channel (DCCH) is a point-to-point bidirectional logical channel used by UEs with RRC connections 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 one UE for transmitting user information. DTCH can exist in both the uplink and downlink. In the downlink, there are the following connections 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, there are the following connections 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.

[0133] The RLC sublayer supports three transmission modes: transparent mode (TM), unacknowledged mode (UM) and acknowledged mode (AM). The RLC configuration is per logical channel without dependency 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: delivery of upper layer PDUs; sequence numbering independent of sequence numbering in PDCP (UM and AM); error correction through ARQ (AM only); segmentation (AM and UM) and re-segmentation (AM only) of RLC SDUs; reassembly of SDUs (AM and UM); duplicate detection (AM only); RLC SDU discard (AM and UM); RLC re-establishment; protocol error detection (AM).

[0134] 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-sequence delivery; PDCP PDU routing (in the case of split bearers); retransmission of PDCP SDU; ciphering, deciphering and integrity protection; PDCP SDU discard; PDCP re-establishment and data recovery for RLC AM; PDCP status report for RLC AM; duplication of PDCP PDU and duplicate discard indication to lower layers. The main services and functions of the PDCP sublayer for the control plane include: sequence numbering; ciphering, deciphering and integrity protection; transmission of control plane data; reordering and duplicate detection; in-sequence delivery; duplication of PDCP PDU and duplicate discard indication to lower layers.

[0135] In 3GPP NR system, the main services and functions of SDAP include: mapping between QoS flows and data radio bearers; marking QoS flow ID (QFI) in both DL and UL packets. A single protocol entity of SDAP is configured for each individual PDU session.

[0136] In the 3GPP NR system, the main services and functions of the RRC sublayer include: broadcast of system information related to AS and NAS; paging initiated by 5GC or NG-RAN; establishment, maintenance and release of RRC connection between UE and NG-RAN; security functions including key management; establishment, configuration, maintenance and release of signaling radio bearers (SRBs) and data radio bearers (DRBs); mobility functions (including: handover and context transfer, UE cell selection and reselection and control of cell selection and reselection, inter-RAT mobility); QoS management functions; UE measurement reporting and control of reporting; detection and recovery of radio link failures; NAS message transmission from UE to NAS / from NAS to UE.

[0137] Figure 8 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0138] Figure 8The frame structure shown in is merely exemplary, and the number of subframes, the number of time slots, and / or the number of symbols in a frame may vary. In a 3GPP-based wireless communication system, OFDM parameter sets (e.g., subcarrier spacing (SCS), transmission time interval (TTI) duration) may be configured differently between multiple cells aggregated for one UE. For example, if the UE is configured with different SCSs for cells aggregated for the cell, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) including the same number of symbols may be different among the aggregated cells. In this article, the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0139] Reference Figure 8 , downlink and uplink transmissions are organized into frames. Each frame has T f = 10ms duration. Each frame is divided into two half-frames, where each half-frame has a duration of 5ms. Each half-frame includes 5 sub-frames, where the duration of each sub-frame is T sf is 1 ms. Each subframe is divided into slots, and the number of slots in a subframe depends on the subcarrier spacing. Each slot includes 14 or 12 OFDM symbols based on a cyclic prefix (CP). In a normal CP, each slot includes 14 OFDM symbols, and in an extended CP, each slot includes 12 OFDM symbols. The parameter set is based on an exponentially scalable subcarrier spacing Δf=2 u *15kHz.

[0140] Table 1 shows the subcarrier spacing according to Δf=2 u *N is the number of OFDM symbols per time slot of 15kHz slot symb , the number of time slots per frame N frame，u slot , and the number of time slots N per subframe for normal CP subframe,u slot .

[0141] [Table 1]

[0142] u <![CDATA[N slot symb ]]> <![CDATA[N frame，u slot ]]> <![CDATA[N subffame，u slot ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0143] Table 2 shows the subcarrier spacing Δf=2 u *N is the number of OFDM symbols per time slot of 15kHz slot symb , the number of time slots per frame N frame，u slot , and the number of time slots N per subframe for the extended CPsubframe,u slot .

[0144] [Table 2]

[0145] u <![CDATA[N slot symb ]]> <![CDATA[N frame，u slot ]]> <![CDATA[N subframe，u slot ]]> 2 12 40 4

[0146] A slot includes a plurality of 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 indicated by higher layer signaling (e.g., RRC signaling) is allocated. start，u grid To begin, we define N size,u grid，x *N RB sc subcarriers and N subframe，u symb OFDM symbol resource grid, where N size,u grid，x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for the downlink and UL for the uplink. N RB sc is the number of subcarriers per RB. In 3GPP-based wireless communication systems, N RB sc Typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL), there is one resource grid. The carrier bandwidth N for subcarrier spacing configuration u size,u grid Given by high-level 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 one 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 1 representing the symbol position relative to a reference point in the time domain.

[0147] In 3GPP-based wireless communication systems, an RB is defined by 12 consecutive subcarriers in the frequency domain. In 3GPP NR systems, 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 CRB0 for subcarrier spacing configuration u coincides with "point A" used as a common reference point for the resource block grid. In 3GPP NR systems, PRBs are defined within bandwidth parts (BWPs) and are numbered from 0 to N. size BWP,i -1 numbering, where i is the number of the bandwidth part. Physical resource block n in bandwidth part i PRB With common resource block n CRB The relationship between them is as follows:PRB =n CRB +N size BWP,i , where N size BWP,i It is a common resource block where the bandwidth part starts relative to CRB 0. A BWP includes 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 activated at a time among the BWPs configured for a UE. The active BWP defines the operating bandwidth of the UE within the operating bandwidth of the cell.

[0148] The NR frequency band may be defined as two types of frequency ranges, namely, FR1 and FR2. The numerical values ​​of the frequency ranges may vary. For example, the two types of frequency ranges (FR1 and FR2) may be as shown in Table 3 below. For ease of explanation, in the frequency range used in the NR system, FR1 may mean "sub-6 GHz range", FR2 may mean "above 6 GHz range" and may be referred to as millimeter wave (mmW).

[0149] [Table 3]

[0150] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz-6000MHz 15,30,60kHz FR2 24250MHz-52600MHz 60,120,240kHz

[0151] As described above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 may include a frequency band of 410 MHz to 7125 MHz, as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed frequency band. The unlicensed frequency band may be used for various purposes, such as for communication of vehicles (e.g., autonomous driving).

[0152] [Table 4]

[0153] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15,30,60kHz FR2 24250MHz-52600MHz 60,120,240kHz

[0154] In the present disclosure, the term "cell" may refer to a geographical area where one or more nodes provide a communication system or to a radio resource. "Cell" as a geographical area can be understood as a coverage range in which a node can provide services using a carrier, and "cell" as a radio resource (e.g., time-frequency resource) is associated with a bandwidth, which is a frequency range configured by a carrier. A "cell" associated with a radio resource is defined by a combination of downlink resources and uplink resources (e.g., a combination of DL component carriers (CCs) and ULCCs). A cell may be configured only by downlink resources, or may be configured by downlink resources and uplink resources. Since the DL coverage (which is the range in which a node can send a valid signal) and the UL coverage (which is the range in which a node can receive a valid signal from a UE) depend on the carrier carrying the signal, the coverage of a node may be associated with the coverage of a "cell" of a radio resource used by the node. Therefore, the term "cell" may be used to sometimes represent the service coverage of a node, to represent a radio resource at other times, or to represent the range in which a signal using a radio resource can reach with effective strength at other times.

[0155] In CA, two or more CCs are aggregated. The UE can receive or transmit on one or more CCs simultaneously according to its capabilities. CA is supported for both continuous CCs and non-contiguous CCs. When CA is configured, the UE has only one RRC connection with the network. When the RRC connection is established / reestablished / switched, one serving cell provides NAS mobility information, and when the RRC connection is reestablished / switched, one serving cell provides security input. This cell is called the primary cell (PCell). PCell is a cell operating on the primary frequency, where the UE performs an initial connection establishment process or initiates a connection reestablishment process. Depending on the UE capabilities, the secondary cell (SCell) can be configured to form a set of serving cells together with the PCell. SCell is a cell that provides additional radio resources on top of a special cell (PCell). Therefore, the set of configured serving cells for the UE always consists of one PCell and one or more SCells. For dual connection (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). SpCell supports PUCCH transmission and contention-based random access and is always activated. MCG is a set of serving cells associated with the master node, which includes SpCell (PCell) and optionally one or more SCells. For UEs configured with DC, SCG is a subset of serving cells associated with the secondary node, which includes PSCell and zero or more SCells. For UEs in RRC_CONNECTED that are not configured with CA / DC, there is only one serving cell consisting of PCell. For UEs in RRC_CONNECTED that are configured with CA / DC, the term "serving cell" is used to refer to the set of cells consisting of SpCell and all SCells. In DC, two MAC entities are configured in the UE: one for MCG and one for SCG.

[0156] Fig. 9 An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0157] Reference Fig. 9 , "RB" means radio bearer, and "H" means header. Radio bearers are classified into two groups: DRB for user plane data and SRB for control plane data. MAC PDU is transmitted / received to / from an external device through the PHY layer using radio resources. MAC PDU arrives at the PHY layer in the form of a transport block.

[0158] In the PHY layer, uplink transport channels UL-SCH and RACH are mapped to their physical channels PUSCH and PRACH, respectively, and 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 physical PUCCH, and downlink control information (DCI) is mapped to PDCCH. MAC PDU related to UL-SCH is sent by UE via PUSCH based on UL grant, and MAC PDU related to DL-SCH is sent by BS via PDSCH based on DL assignment.

[0159] In the following, technical features related to the flight path are described. Reference may be made to sections 5.3.3.4, 5.5.4.16, 5.5.4.17, 5.6.5.3 and part of 6.2.2 of 3GPP TS 36.331 v16.6.0.

[0160] Operations related to reception of an RRCConnectionSetup by a UE are described.

[0161] The UE shall:

[0162] 1> Set the content of the RRCConnectionSetupComplete message as follows:

[0163] 2> If the UE is connected to the EPC:

[0164] 3>Except NB-IoT:

[0165] 4> mobilityState is included and set to the mobility state of the UE just before entering the RRC_CONNECTED state;

[0166] 4> If the UE has flight path information available:

[0167] 5>Include flightPathInfoAvailable;

[0168] Describes operations related to the reception of a UEInformationRequest message.

[0169] 1>Except NB-IoT, if the flightPathInfoReq field is present and the UE has available flight path information:

[0170] 2> Include flightPathInfoReport and set it to include a list of waypoints along the flight path;

[0171] 2>If includeTimeStamp is set to true:

[0172] 3> If this information is available at the UE, the field timeStamp is set to the time the UE aims to arrive at each waypoint;

[0173] Technical features related to the UEInformationRequest message are described. UEInformationRequest is a command used by the E-UTRAN to retrieve information from the UE.

[0174] For example, the signaling radio bearer for UEInformationRequest may include SRB1. The RLC-Service Access Point (SAP) for UEInformationRequest may include AM. The logical channel for UEInformationRequest may include DCCH. The direction for UEInformationRequest may be E-UTRAN to UE.

[0175] UEInformationRequest may include information about flightPathInfoReq (eg, FlightPathInfoReportConfig) and / or information about nonCriticalExtension.

[0176] Technical features related to the UEInformationResponse message are described. For example, the UEInformationResponse message is used by the UE to transmit information requested by the E-UTRAN.

[0177] For example, the signaling radio bearer for UEInformationResponse may include SRB1 or SRB2 (when logged measurement information is included). The RLC-SAP for UEInformationResponse may include AM. The logical channel for UEInformationResponse may include DCCH. The direction for UEInformationResponse may be UE to E-UTRAN.

[0178] For example, the UEInformationResponse message may include a flightPathInfoReport. For example, the flightPathInfoReport may include information about one or more flightPaths and / or one or more wayPointLocations.

[0179] Technical features related to LocationInfo are described. For example, the IE LocationInfo is used to convey detailed location information available at the UE to correlate measurements with the UE location information.

[0180] For example, the LocationInfo information element may include verticalVelocityInfo including information about verticalVelocity and verticalVelocityAndUncertainty.

[0181] For example, verticalVelocityAndUncertainty may include information about a parameter verticalVelocityAndUncertainty that corresponds to horizontalWithVerticalVelocityAndUncertainty.The first / leftmost bit of the first octet contains the most significant bit.

[0182] For example, verticalVelocity may include information about a parameter verticalVelocity that corresponds to horizontalWithVerticalVelocity.The first / leftmost bit of the first octet contains the most significant bit.

[0183] The UE operation related to event H1 (UE altitude in the air is above a threshold) is described.

[0184] The UE shall:

[0185] 1> When the condition H1-1 specified below is met, the entry condition for the event is considered to be met;

[0186] 1> When the following specified conditions H1-2 are met, the exit condition for the event is considered to be met;

[0187] Inequality H1-1 (entry condition)

[0188] Ms-Hys>Thresh+Offset

[0189] Inequality H1-2 (leave condition)

[0190] Ms+Hys<Thresh+Offset

[0191] The variables in the formula are defined as follows:

[0192] Ms is the UE altitude in the air, without taking any offset into account.

[0193] Hys is the hysteresis parameter for this event (ie, h1-Hysteresis as defined in ReportConfigEUTRA).

[0194] Thresh is the reference threshold parameter for this event given in MeasConfig (ie, heightThreshRef as defined in MeasConfig).

[0195] Offset is the offset value with respect to heightThreshRef to obtain the absolute threshold for this event. (i.e. h1-ThresholdOffset as defined in ReportConfigEUTRA)

[0196] Ms is expressed in meters.

[0197] Thresh is expressed in the same units as Ms.

[0198] UE operations related to event H2 (UE altitude in the air is below a threshold) are described.

[0199] The UE shall:

[0200] 1> When the condition H2-1 specified below is met, the entry condition for the event is considered to be met;

[0201] 1> When the condition H2-2 specified below is met, the exit condition for the event is considered to be met;

[0202] Inequality H2-1 (entry condition)

[0203] Ms+Hys<Thresh+Offset

[0204] Inequality H2-2 (leave condition)

[0205] Ms-Hys>Thresh+Offset

[0206] The variables in the formula are defined as follows:

[0207] Ms is the UE altitude in the air, without taking any offset into account.

[0208] Hys is the hysteresis parameter for this event (ie, h2-Hysteresis as defined in ReportConfigEUTRA).

[0209] Thresh is the reference threshold parameter for this event given in MeasConfig (ie, heightThreshRef as defined in MeasConfig).

[0210] Offset is the offset value with respect to heightThreshRef to obtain the absolute threshold for this event. (i.e. h2-ThresholdOffset as defined in ReportConfigEUTRA)

[0211] Ms is expressed in meters.

[0212] Thresh is expressed in the same units as Ms.

[0213] In the following, technical features related to over-the-air UE communication are described. Reference may be made to a part of section 23.17 of 3GPP TS 36.300 v16.5.0.

[0214] E-UTRAN based mechanisms for providing LTE connectivity to over-the-air capable UEs are supported via the following functions:

[0215] -Subscription based over-the-air UE identification and authentication.

[0216] - Altitude reporting based on the event that the UE's altitude has crossed a network configured reference altitude threshold.

[0217] - Interference detection based on measurement reports, which are triggered when the number of configured cells (ie, greater than 1) simultaneously meets the triggering criteria.

[0218] -Signaling of flight path information from UE to E-UTRAN.

[0219] - Position information report, including horizontal and vertical speed of the UE.

[0220] [Subscription-based identification of over-the-air UE capabilities]

[0221] The support of over-the-air UE functions is stored in the user's subscription information in the HSS. The HSS transmits this information to the MME during the attach, service request and tracking area update procedures.

[0222] The subscription information may be provided from the MME to the eNB via the S1AP Initial Context Setup Request during the Attach, Tracking Area Update and Service Request procedures. Additionally, for X2-based handovers, the source eNodeB may include the subscription information in the X2-AP Handover Request message to the target eNodeB.

[0223] For intra-MME and inter-MME S1 based handover, the MME provides subscription information to the target eNB after the handover procedure.

[0224] [Altitude-based reporting for airborne UE communications]

[0225] An aerial UE can be configured with event-based altitude reporting. When the altitude of an aerial UE is above or below a configured threshold, the UE sends an altitude report. If configured, the report contains both altitude and position.

[0226] [Interference Detection and Mitigation for Over-the-Air UE Communications]

[0227] For interference detection, an airborne UE may be configured with RRM events A3, A4 or A5, which trigger a measurement report when the individual (per cell) RSRP values ​​for a configured number of cells meet the configured event. If configured, the report contains the RRM results and location.

[0228] For interference mitigation, over-the-air UEs may be configured with a dedicated UE-specific α parameter for PUSCH power control.

[0229] [Flight Path Information Report]

[0230] The E-UTRAN may request the UE to report flight path information consisting of multiple waypoints defined as 3D positions. If the flight path information is available at the UE, the UE reports up to the configured number of waypoints. The report may also include a timestamp for each waypoint if configured in the request and if available at the UE.

[0231] [Position reporting for airborne UE communications]

[0232] If configured, the location information for airborne UE communications may include horizontal and vertical speeds. The location information may be included in RRM reports and altitude reports.

[0233] In the following, technical features related to conditional mobility are described. Reference may be made to a part of section 5.3.5.13 of 3GPP TS 38.331 v17.0.0.

[0234] The network configures one or more candidate target SpCells to the UE in conditional reconfiguration. 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 condition. The network provides configuration parameters for the target SpCell in the ConditionalReconfiguration IE.

[0235] The UE performs the following actions based on the received ConditionalReconfiguration IE:

[0236] 1> If ConditionalReconfiguration contains condReconfigToRemoveList:

[0237] 2>Execute the conditional reconfiguration removal process;

[0238] 1> If ConditionalReconfiguration contains condReconfigToAddModList:

[0239] 2>Perform conditional reconfiguration addition / modification;

[0240] [Conditional reconfiguration removed]

[0241] The UE shall:

[0242] 1> For each condReconfigId value included in condReconfigToRemoveList that is part of the current UE conditional reconfiguration in VarConditionalReconfig:

[0243] 2> Remove the entry with matching condReconfigId from VarConditionalReconfig;

[0244] NOTE: If condReconfigToRemoveList includes any condReconfigId value that is not part of the current UE configuration, the UE does not consider the message to be erroneous.

[0245] [Conditional reconfiguration additions / modifications]

[0246] For each condReconfigId received in the condReconfigToAddModList IE, the UE shall:

[0247] 1> If an entry with a matching condReconfigId exists in condReconfigToAddModList within VarConditionalReconfig:

[0248] 2> If the entries in condReconfigToAddModList include condExecutionCond or condExecutionCondSCG;

[0249] 3>Replace condExecutionCond or condExecutionCondSCG in VarConditionalReconfig with the value received for that condReconfigId;

[0250] 2> If the entries in condReconfigToAddModList include condRRCReconfig;

[0251] 3>Replace condRRCReconfig in VarConditionalReconfig with the value received for this condReconfigId;

[0252] 1> Otherwise:

[0253] 2> Add a new entry for the condReconfigId in VarConditionalReconfig;

[0254] 1>Perform conditional reconfiguration evaluation;

[0255] [Conditional reconfiguration evaluation]

[0256] The UE shall:

[0257] 1>For each condReconfigId in VarConditionalReconfig:

[0258] 2> If the RRCReconfiguration in condRRCReconfig includes a masterCellGroup with reconfigurationWithSync, the cell having a physical cell identity matching the value indicated in ServingCellConfigCommon included in reconfigurationWithSync in the masterCellGroup in the received condRRCReconfig is considered as an applicable cell;

[0259] 2> If the RRCReconfiguration in condRRCReconfig includes a secondaryCellGroup with reconfigurationWithSync, the cell having a physical cell identity matching the value indicated in ServingCellConfigCommon included in reconfigurationWithSync in the secondaryCellGroup in the received condRRCReconfig is considered an applicable cell;

[0260] 2> If condExecutionCondSCG is configured:

[0261] 3> In the rest of the process, each measId indicated in condExecutionCondSCG is treated as a measId in the VarMeasConfig associated with the SCG measConfig;

[0262] 2>If condExecutionCond is configured:

[0263] 3> If it is configured via SRB3 or configured via SRB1 in nr-SCG or in nr-SecondaryCellGroupConfig:

[0264] 4> In the rest of the process, each measId indicated in condExecutionCond is treated as a measId in the VarMeasConfig associated with SCGmeasConfig;

[0265] 3>Otherwise:

[0266] 4> In the rest of the process, each measId indicated in condExecutionCond is treated as a measId in the VarMeasConfig associated with MCGmeasConfig;

[0267] 2> For each measId included in the measIdList within the VarMeasConfig indicated in the condExecutionCond or condExecutionCondSCG associated with condReconfigId:

[0268] 3> if condEventId is associated with condEventT1, and if the entry conditions applicable to the event associated with condReconfigId (i.e., the event corresponding to the condEventId of the corresponding condTriggerConfig within VarConditionalReconfig) are met for the applicable cell; or

[0269] 3> if condEventId is associated with condEventD1, and if the entry conditions for the event are met for the applicable cell during the corresponding timeToTrigger defined for the event associated with condReconfigId in VarConditionalReconfig (i.e., the event corresponding to condEventId of the corresponding condTriggerConfig in VarConditionalReconfig); or

[0270] 3> If condEventId is associated with condEventA3, condEventA4, or condEventA5, and if, after layer 3 filtering during the corresponding timeToTrigger defined within VarConditionalReconfig for that event associated with condReconfigId (i.e., the event corresponding to the condEventId of the corresponding condTriggerConfig within VarConditionalReconfig), the entry conditions applicable to that event are met for the applicable cells for all measurements:

[0271] 4> It is considered that the event associated with the measId is satisfied;

[0272] 3> If the measId for the event associated with condReconfigId has been modified; or

[0273] 3> if condEventId is associated with condEventT1, and if the leaving condition applicable to the event associated with condReconfigId (i.e., the event corresponding to the condEventId of the corresponding condTriggerConfig within VarConditionalReconfig) is met for the applicable cell; or

[0274] 3> if condEventId is associated with condEventD1, and if during the corresponding timeToTrigger defined in VarConditionalReconfig for the event associated with condReconfigId (i.e., the event corresponding to condEventId of the corresponding condTriggerConfig in VarConditionalReconfig), the leaving condition applicable to the event is satisfied for the applicable cell; or

[0275] 3> If condEventId is associated with condEventA3, condEventA4, or condEventA5, and if, after layer 3 filtering during the corresponding timeToTrigger defined within VarConditionalReconfig for the event associated with condReconfigId (i.e., the event corresponding to the condEventId of the corresponding condTriggerConfig within VarConditionalReconfig), the leave condition applicable to the event is met for the applicable cell for all measurements:

[0276] 4> The event associated with the measId is considered not to be satisfied;

[0277] 2> If the events associated with all measIds in the condTriggerConfig for the target candidate cell in the stored condRRCReconfig are met:

[0278] 3> The target candidate cell associated with the condReconfigId in the stored condRRCReconfig is regarded as the triggering cell;

[0279] 3>Initiate conditional reconfiguration execution;

[0280] Up to 2 MeasIds can be configured for each condReconfigId. The conditional reconfiguration events of the 2 MeasIds can have the same or different event conditions, trigger quantities, trigger times, and trigger thresholds.

[0281] [Evaluation of conditional reconfiguration of inter-SN CPC initiated by SN for EN-DC]

[0282] The UE shall:

[0283] 1>For each condReconfigId in VarConditionalReconfig:

[0284] 1> In the rest of the process, each measId indicated in the IE of the CondReconfigExecCondSN contained in the triggerConditionSN is treated as a measId in the VarMeasConfig associated with the SCG measConfig;

[0285] 1> For each measId included in the measIdList within the VarMeasConfig indicated in the CondReconfigExecCondSN contained in the triggerConditionSN associated with the condReconfigurationId:

[0286] 2> If, after layer 3 filtering performed during the corresponding timeToTrigger defined for the event associated with the measId, the entry conditions applicable to the event associated with the measId are met for the applicable cell for all measurements:

[0287] 3> The event is considered to be satisfied;

[0288] 2>If the measId for the event has been modified; or

[0289] 2> If, after layer 3 filtering performed during the corresponding timeToTrigger defined for the event associated with the measId, the leaving condition applicable to the event associated with the measId is met for the applicable cell for all measurements:

[0290] 3> The event associated with the measId is considered not to be satisfied;

[0291] 1> If the trigger conditions for all events associated with the measId indicated in the IE of CondReconfigExecCondSN contained in triggerConditionSN are met:

[0292] 2> The target cell candidate associated with the condReconfigurationId in the RRCReconfiguration message contained in the nr-SecondaryCellGroupConfig in the RRCConnectionReconfiguration message contained in the stored condReconfigurationToApply is regarded as the triggering cell;

[0293] 2>Initiate conditional reconfiguration execution;

[0294] If multiple NR cells are triggered in the conditional reconfiguration execution, which NR cell is selected for execution based on the UE implementation (for example, the UE selects one of the triggered cells considering the beam and beam quality).

[0295] [Conditional reconfiguration execution]

[0296] The UE shall:

[0297] 1> If there is more than one triggering cell:

[0298] 2> Select one of the triggering cells as the selected cell for conditional reconfiguration execution;

[0299] 1> Otherwise:

[0300] 2> Treat the triggering cell as the selected cell for conditional reconfiguration execution;

[0301] 1>Select cells for conditional reconfiguration:

[0302] 2> Apply the stored condRRCReconfig of the selected cell and perform the action;

[0303] If multiple NR cells are triggered in the conditional reconfiguration execution, which NR cell is selected for execution based on the UE implementation (for example, the UE selects one of the triggered cells considering the beam and beam quality).

[0304] In the following, technical features related to the cell reselection evaluation process are described. Reference may be made to a part of section 5.2.4 of 3GPP TS 38.331 v17.0.0.

[0305] Cell reselection evaluation process

[0306] [Reselect priority handling]

[0307] The absolute priority of different NR frequencies or inter-RAT frequencies may be provided to the UE in system information, in the RRCRelease message, or by inheritance from another RAT at the inter-RAT cell (reselection). In the case of system information, NR frequencies or inter-RAT frequencies may be listed without providing a priority (i.e., the field cellReselectionPriority does not exist for that frequency). If any field with cellReselectionPriority is provided in dedicated signaling, the UE shall ignore any field with cellReselectionPriority and any slice reselection information provided in the system information. If slice reselection information is provided in dedicated signaling, the UE shall ignore the slice reselection information provided in the system information.

[0308] If the UE is in normal camp state and the UE supports slice-based cell reselection, the UE shall derive the reselection priority.

[0309] If the UE resides in any cell state, the UE shall only apply the priority provided by the system information from the current cell, unless otherwise specified, and the UE retains the priority provided by the dedicated signaling and the deprioritisationReq received in the RRCRelease. When the UE in the normal resident state has only dedicated priorities other than the current frequency, the UE shall regard the current frequency as the lowest priority frequency (i.e., lower than any network configured value). When a UE with HSDN capability is in a high mobility state, the UE shall always consider the HSDN cell to have the highest priority (i.e., higher than the priority configured by any other network). When a UE with HSDN capability is not in a high mobility state, the UE shall always consider the HSDN cell to have the lowest priority (i.e., lower than the priority configured by any other network). If the UE is configured to perform both NR sidelink communication and V2X sidelink communication, the UE may regard the frequency that provides both the NR sidelink communication configuration and the V2X sidelink communication configuration as having the highest priority. If the UE is configured to perform NR sidelink communication and not perform V2X communication, the UE may regard the frequency that provides the NR sidelink communication configuration as having the highest priority. If the UE is configured to perform V2X sidelink communication and not to perform NR sidelink communication, the UE may consider the frequency providing the V2X sidelink communication configuration as having the highest priority.

[0310] Frequencies that only provide anchor frequency configuration should not be prioritized for V2X services during cell reselection.

[0311] When a UE configured to perform NR sidelink communication or V2X sidelink communication performs cell reselection, frequencies providing intra-carrier and inter-carrier configurations may be considered to have equal priority in the cell reselection.

[0312] The prioritization among the frequencies that the UE considers to be the highest priority frequencies depends on the UE implementation.

[0313] If the UE has the capability and is authenticated for the corresponding sidelink operation, the UE is configured to perform V2X sidelink communication or NR sidelink communication.

[0314] When the UE is configured to perform both NR sidelink communication and V2X sidelink communication but cannot find a frequency that can provide both NR sidelink communication configuration and V2X sidelink communication configuration, the UE may consider the frequency that provides either the NR sidelink communication configuration or the V2X sidelink communication configuration as having the highest priority.

[0315] The UE is configured with a dedicated cell reselection priority or a slice or slice group specific frequency priority in the RRCRelease message.

[0316] The UE shall perform cell reselection evaluation only for NR frequencies and inter-RAT frequencies that are given in the system information and for which the UE has priority provided.

[0317] If a UE with MBS broadcast capability is receiving or is interested in receiving an MBS broadcast service and can only receive the MBS broadcast service by camping on its provided frequency, the UE may consider the frequency as having the highest priority during the MBS broadcast session as long as the following two conditions are met:

[0318] 1) SIB20 is provided by the cell that the UE reselects due to frequency prioritization for MBS;

[0319] 2) Any of the following:

[0320] - one or more MBS FSAIs for that frequency are indicated in the SIB21 of the serving cell, and the same MBS FSAI is also indicated for that MBS broadcast service in the MBS User Service Description (USD), or

[0321] - SIB21 is not provided in the serving cell and the frequency is included in the USD of the service, or

[0322] - SIB21 is set in the serving cell but does not provide frequency mapping for the related service, and the frequency is included in the USD of the service.

[0323] How the information in the USD is used to determine whether / how to perform frequency prioritization for a specific frequency / frequencies included in the USD depends on the UE implementation.

[0324] If a UE with MBS broadcast capability is receiving or is interested in receiving MBS broadcast services, the UE may consider cell reselection candidate frequencies at which it is unable to receive MBS broadcast services as having the lowest priority during the MBS broadcast session, as long as the cells on the MBS frequencies monitored by the UE provide SIB20 and as long as the above condition 2) is met for the serving cell.

[0325] In the event that the UE receives a RRCRelease with deprioritisationReq, the UE shall treat the current frequency and the frequencies stored due to a previously received RRCRelease with deprioritisationReq or all frequencies of the NR as the lowest priority frequencies (i.e., lower than any network configured value) while T325 is running regardless of the RAT in which it is camped. The UE shall delete the stored deprioritization request when performing PLMN selection or SNPN selection at the request of NAS.

[0326] The UE shall search for a higher priority layer for cell reselection as soon as possible after the priority change. The minimum relevant performance requirements still apply.

[0327] The UE shall delete the priority level provided by dedicated signalling in the following cases:

[0328] - The UE enters a different RRC state; or

[0329] - the optional validity time (T320) of the dedicated priority level has expired; or

[0330] - The UE receives a RRCRelease message in which the cellReselectionPriorities field is missing; or

[0331] -Perform PLMN selection or SNPN selection based on the request of NAS.

[0332] Equal priority between RATs is not supported.

[0333] The UE shall not consider any cells in the exclusion list as candidates for cell reselection.

[0334] If configured, the UE shall only consider cells in the allowed list as candidates for cell reselection.

[0335] A UE in RRC_IDLE state shall inherit the priority and remaining validity time (i.e. T320 in NR and E-UTRA) provided by dedicated signalling upon inter-RAT cell (re)selection (if configured).

[0336] The network may assign dedicated cell reselection priorities for frequencies not configured by system information.

[0337] [Measurement rules for cell reselection]

[0338] The UE uses the following rules to limit the required measurements:

[0339] - If the serving cell satisfies Srxlev>S IntraSearchP and Squal>S IntraSearchQ :

[0340] - If distanceThresh is broadcasted in SIBxx and if the UE supports location based measurement initiation and has valid UE location information:

[0341] - If the distance between the UE and the serving cell reference location is shorter than distanceThresh, the UE may choose not to perform intra-frequency measurements;

[0342] - Otherwise, the UE shall perform intra-frequency measurements;

[0343] - Otherwise, the UE may choose not to perform intra-frequency measurements;

[0344] - Otherwise, the UE shall perform intra-frequency measurements.

[0345] - The UE shall apply the following rules to the inter-NR frequencies and inter-RAT frequencies indicated in the system information and for which the UE has priority:

[0346] - For an inter-NR frequency or inter-RAT frequency with a reselection priority higher than the reselection priority of the current NR frequency, the UE shall perform measurement of the higher priority inter-NR frequency or inter-RAT frequency.

[0347] - For inter-NR frequencies with a reselection priority equal to or lower than the reselection priority of the current NR frequency, and for inter-RAT frequencies with a reselection priority lower than the reselection priority of the current NR frequency:

[0348] - If the serving cell satisfies Srxlev>S IntraSearchP and Squal>S IntraSearchQ :

[0349] - If distanceThresh is broadcasted in SIBxx and if the UE supports location based measurement initiation and has valid UE location information:

[0350] - If the distance between the UE and the serving cell reference location is shorter than distanceThresh, the UE may choose not to perform measurements on inter-NR frequency cells with the same or lower priority or inter-RAT frequency cells with lower priority;

[0351] - Otherwise, the UE shall perform measurements on inter-NR frequency cells with equal or lower priority or on inter-RAT frequency cells with lower priority;

[0352] - Otherwise, the UE may choose not to perform measurements on inter-NR frequency cells with equal or lower priority or inter-RAT frequency cells with lower priority;

[0353] - Otherwise, the UE shall perform measurements on inter-NR frequency cells with equal or lower priority or on inter-RAT frequency cells with lower priority.

[0354] - If the UE supports relaxed measurements and relaxedMeasurement exists in SIB2, the UE may further relax the required measurements.

[0355] If there is t-Service for the serving cell in SIB19, the UE shall start performing intra-frequency, inter-frequency or inter-RAT measurements before t-Service regardless of the distance between the UE and the serving cell reference position or whether the serving cell satisfies Srxlev>SIntraSearchP and Squal>SIntraSearchQ or Srxlev>SnonIntraSearchP and Squal>SnonIntraSearchQ, and the exact time to start measurements before t-Service depends on the UE implementation. The UE shall perform measurements of inter-NR frequencies or inter-RAT frequencies with higher priority regardless of the remaining service time of the serving cell.

[0356] When evaluating the distance between the UE and the serving cell reference location, the UE location information may be available depending on the UE implementation.

[0357] [UE mobility status]

[0358] If the parameter (T CRmax 、N CR_H 、N CR_M , T CRmaxHyst and cellEquivalentSize), then determine the UE mobility state.

[0359] Status detection criteria:

[0360] Normal mobility state guidelines:

[0361] - If the time period T CRmax The number of cell reselections during the period is less than N CR_M .

[0362] Medium mobility state guidelines:

[0363] - If the time period T CRmax The number of cell reselections during the period is greater than or equal to N CR_M But less than or equal to N CR_H .

[0364] High Mobility State Criteria:

[0365] - If the time period TCRmax The number of cell reselections during the period is greater than N CR_H .

[0366] The UE shall not consider consecutive reselections of a cell where it reselects again immediately after one reselection for the mobility state detection criteria.If the UE is capable of HSDN and cellEquivalentSize is configured, the UE shall count the number of cell reselections for that cell as the cellEquivalentSize configured for that cell.

[0367] State transition:

[0368] The UE shall:

[0369] - If criteria for a high mobility state is detected:

[0370] -Enter high mobility state.

[0371] - Else if criteria for medium mobility state are detected:

[0372] -Enter medium mobility state.

[0373] - Otherwise if in time period T CRmaxHyst No criteria for medium or high mobility states were detected during:

[0374] -Enter normal mobility state.

[0375] If the UE is in a high mobility state or a medium mobility state, the UE shall apply speed dependent scaling rules.

[0376] [Scaling rules]

[0377] The UE shall apply the following scaling rules:

[0378] - If both medium and high mobility states are not detected:

[0379] - No scaling is applied.

[0380] - If a high mobility state is detected:

[0381] - If broadcast in system information, "For Q hyst The speed-dependent scaling factor of sf-High and Q hyst Addition;

[0382] -For NR cells, if broadcast in system information, Treselection NR Multiply by "for Treselection NR sf-High of the speed-dependent scaling factor "

[0383] - For EUTRA cells, if broadcast in the system information, Treselection EUTRA Multiply by "for Treselection EUTRA The speed-dependent scaling factor of sf-High.

[0384] - If medium mobility state is detected:

[0385] - If broadcast in system information, "For Q hyst The velocity-dependent scaling factor of sf-Medium and Q hyst Addition;

[0386] -For NR cells, if broadcast in system information, Treselection NR Multiply by "for Treselection NR The speed-dependent scaling factor of sf-Medium;

[0387] - For EUTRA cells, if broadcast in the system information, Treselection EUTRA Multiply by "for Treselection EUTRA The velocity-dependent scaling factor of sf-Medium.

[0388] Before applying scaling to any Treselection RAT In the case of a % parameter, the UE shall round up the result to the nearest second after all scaling.

[0389] [Cells with cell reservation, access restrictions or not suitable for normal stay]

[0390] For the highest ranked cell (including the serving cell) according to the cell reselection criteria, and for the best cell according to the absolute priority reselection criteria, the UE shall check whether access is restricted.

[0391] If this cell and other cells must be excluded from the candidate list, the UE shall not consider these cells and other cells as candidates for cell reselection. This restriction will be removed when the highest ranked cell changes.

[0392] If the highest ranked cell or the best cell according to the absolute priority reselection rule is an unsuitable intra-frequency or inter-frequency cell due to one or more of the following reasons:

[0393] - the cell belongs to a PLMN which is not indicated as being equivalent to the registered PLMN, or

[0394] - the cell is a CAG cell belonging to a PLMN that is identical to the registered PLMN but does not have a CAG-ID that is present in the allowed CAG list of the broadcasting UE, or

[0395] - the cell is not a CAG cell and the CAG-only indication in the UE is set, or

[0396] - the cell does not belong to a SNPN that is equal to the SNPN registered or selected by the UE in SNPN access mode,

[0397] The UE shall not consider this cell, and for operation in the licensed spectrum, shall not consider other cells on the same frequency as candidates for reselection for a maximum of 300 seconds.

[0398] For operation with shared spectrum channel access, when the highest ranked cell or best cell is not a candidate for reselection as per the previous paragraph, the UE SHOULD continue to consider other cells on the same frequency for cell reselection, however, if the second highest ranked cell on that frequency is also not suitable due to one or more of the reasons stated above, the UE MAY consider that frequency as the lowest priority for a maximum of 300 seconds.

[0399] If the highest ranked cell or best cell according to the absolute priority reselection rule is an intra-frequency or inter-frequency cell that is unsuitable because it is part of the "List of 5GS prohibited TAs for roaming", the UE should not consider this cell and other cells on the same frequency as candidates for reselection for a maximum of 300 seconds.

[0400] If the highest ranked cell or the best cell according to the absolute priority reselection rule is an unsuitable inter-RAT cell due to being part of the "list of prohibited TAs for roaming" or belonging to a PLMN that is not indicated as equivalent to the registered PLMN, the UE shall not consider this cell and other cells on the same frequency as candidates for reselection for a maximum of 300 seconds.

[0401] If the UE enters any state for cell selection, any restrictions shall be removed. If the UE is redirected under NR control to a frequency for which the timer is running, the restrictions for that frequency shall be removed.

[0402] [Inter-NR frequency and inter-RAT cell reselection criteria]

[0403] If threshServingLowQ is broadcasted in the system information and more than 1 second has elapsed since the UE camped on the current serving cell, cell reselection to a cell on an NR frequency or inter-RAT frequency with higher priority than the serving frequency shall be performed if:

[0404] -Treselection in time interval RAT During this period, the cell with higher priority NR or EUTRAN RAT / frequency satisfies Squal>Thresh X,HighQ

[0405] Otherwise, cell reselection to a cell on an NR frequency or inter-RAT frequency with a higher priority than the serving frequency shall be performed if:

[0406] -Treselection in time interval RAT During this period, the cell with higher priority RAT / frequency satisfies Srxlev>Thresh X,HighP ;as well as

[0407] - More than 1 second has passed since the UE camped on the current serving cell.

[0408] Cell reselection to cells on equal priority NR frequencies should be based on the ranking for intra-frequency cell reselection.

[0409] If threshServingLowQ is broadcasted in the system information and more than 1 second has elapsed since the UE camped on the current serving cell, cell reselection to a cell on an NR frequency or inter-RAT frequency with a lower priority than the serving frequency shall be performed if:

[0410] -Treselection in time interval RAT During this period, the serving cell meets Squal <Thresh Serving,LowQ And the cells with lower priority NR or EUTRAN RAT / frequency satisfy Squal>Thresh X,LowQ

[0411] Otherwise, cell reselection to a cell on an NR frequency or inter-RAT frequency with a lower priority than the serving frequency shall be performed if:

[0412] -Treselection in time interval RAT During this period, the serving cell meets Srxlev <Thresh Serving,LowP And the cells with lower priority RAT / frequency satisfy Srxlev>Thresh X,LowP ;as well as

[0413] - More than 1 second has passed since the UE camped on the current serving cell.

[0414] For UEs performing slice-based cell reselection, if a cell meets the above criteria for cell reselection based on frequency and slice group reselection priority, but the cell does not support slice groups, the UE shall re-derive the reselection priority for the frequency by considering the slice groups supported by the cell (instead of the slice groups corresponding to the NR frequency). This reselection priority will be used until the highest ranked cell changes in frequency, or a new slice or slice group priority is received from NAS. The UE shall ensure that the above cell reselection criteria are met based on the newly derived priorities.

[0415] If multiple cells of different priorities meet the cell reselection criteria, cell reselection to a higher priority RAT / frequency will take precedence over a lower priority RAT / frequency.

[0416] If more than one cell meets the above criteria, the UE shall reselect a cell as follows:

[0417] - if the highest priority frequency is an NR frequency, the highest ranked cell among the cells on the highest priority frequency that meets the criteria;

[0418] - If the highest priority frequency is from another RAT, the strongest cell among the cells on the highest priority frequency that meets the criteria for that RAT.

[0419] [Intra-frequency and equal-priority inter-frequency cell reselection criteria]

[0420] The cell ranking criterion R for the serving cell s and R for neighboring cells n It is defined by:

[0421] R s =Q meas,s +Q hyst -Qoffset temp

[0422] R n =Q meas,n -Q offset -Qoffset temp

[0423] [Table 5]

[0424]

[0425] The UE shall perform a ranking of all cells that satisfy the cell selection criterion S. It shall derive Q meas,n and Q meas,s The average RSRP results are used to calculate the R value to rank the cells according to the R criteria specified above.

[0426] If rangeToBestCell is not configured, the UE shall perform cell reselection to the highest ranked cell if that cell is found to be unsuitable.

[0427] If rangeToBestCell is configured, the UE shall perform cell reselection to the cell with the highest number of beams above the threshold (i.e., absThreshSS-BlocksConsolidation) among the cells whose R value is within rangeToBestCell of the highest ranked cell. If there are multiple such cells, the UE shall perform cell reselection to the highest ranked cell among them if that cell is found to be unsuitable.

[0428] In all cases, the UE shall reselect a new cell only if the following conditions are met:

[0429] -Treselection in time interval RAT During this period, the new cell is preferred over the serving cell according to the cell reselection criteria specified above;

[0430] - More than 1 second has passed since the UE camped on the current serving cell.

[0431] If rangeToBestCell is configured but absThreshSS-BlocksConsolidation is not configured on an NR frequency, the UE considers that there is one beam above the threshold for each cell on that frequency.

[0432] [Inter-RAT cell reselection in RRC_INACTIVE state]

[0433] For a UE in the RRC_INACTIVE state, upon cell reselection to another RAT, the UE transitions from RRC_INACTIVE to RRC_IDLE and performs actions.

[0434] [Reselection priority for slice-based cell reselection]

[0435] The UE derives the reselection priority for slice-based cell reselection by using:

[0436] - a list of prioritized slice groups provided by NAS in priority order,

[0437] - per-frequency sliceInformation with sliceSpecificCellReselectionPriority per slice group if system information and / or dedicated signaling is provided,

[0438] - cellReselectionPriority per frequency provided in system information and / or dedicated signaling.

[0439] The UE considers that the NR frequency supports slice groups if the following occurs:

[0440] -NR frequency is included in sliceInformation and indicates support for a slice group.

[0441] The UE considers that a cell on the NR frequency supports slice groups if:

[0442] -NR frequency is included in sliceInformation and supports the slice group; and

[0443] - the cell is listed in sliceAllowCellListNR (if provided in the system information and / or dedicated signalling of the serving cell); or

[0444] - The cell is not listed in sliceExcludeCellListNR (if provided in the system information and / or dedicated signaling of the serving cell).

[0445] The UE shall derive the reselection priority for slice-based cell reselection according to the following rules:

[0446] - A frequency supporting at least one prioritized slice group received from the NAS has a higher reselection priority than a frequency not supporting a prioritized slice group.

[0447] - Frequencies supporting at least one slice group are prioritized in the order of priority provided by the NAS for the highest prioritized slice group for that frequency.

[0448] - Among the frequencies supporting the same highest prioritized slice group, the frequencies are prioritized in the order of their per-slice-group sliceSpecificCellReselectionPriority.

[0449] - A frequency that supports prioritized slice groups and indicates sliceSpecificCellReselectionPriority per slice group has a higher reselection priority than a frequency that supports the prioritized slice groups but does not indicate sliceSpecificCellReselectionPriority per slice group.

[0450] - does not support prioritizing the frequencies of slice groups in the order of their cellReselectionPriority;

[0451] In addition, as the altitude of aerial UEs increases, they experience line-of-sight propagation conditions to more cells, making distant cells more visible to them. As a result, aerial UEs will receive interference from more cells in the downlink and cause interference to more cells in the uplink. In addition, aerial coverage becomes segmented at higher altitudes. Typically, when the main lobe points to the ground, the ground UE is served by the nearest network. In contrast, aerial UEs are served by side lobes of neighboring networks that are located far away from the aerial UE. Therefore, a distant network may become the serving network, and the cell coverage may not be continuous.

[0452] When an aerial UE flies across multiple cells at a specific altitude and direction, the quality of its serving cell will fluctuate at a specific frequency based on network evaluation. An aerial UE can see multiple cells with similar signal strengths, which makes it difficult to select a suitable cell based solely on cell quality (such as RSRP and RSRQ). Especially in the case of conditional mobility (e.g., conditional handover (CHO) and conditional PSCell addition / change (CPAC)), if an aerial UE detects more neighbor cells, the UE may perform cell changes more frequently. This results in more signaling overhead for air interference, and the network may perform more handover preparations for neighbor cells for CHO / CPAC.

[0453] Therefore, there is a need for research on height-based mobility in wireless communication systems.

[0454] Hereinafter, a method for altitude-based mobility in a wireless communication system according to some embodiments of the present disclosure will be described with reference to the following drawings.

[0455] The following figures are created to explain the specific embodiments of the present disclosure. The names of the specific devices or the names of the specific signals / messages / fields shown in the figures are provided by way of example, and therefore the technical features of the present disclosure are not limited to the specific names used in the following figures. Here, the wireless device may be referred to as a user equipment (UE).

[0456] Fig.10 An example of a method for altitude-based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0457] Specifically, Fig.10 An example of a method performed by a wireless device in a wireless communication system is shown.

[0458] In step S1001 , the wireless device may receive information about a mobility configuration associated with an altitude range.

[0459] For example, the mobility configuration may be a configuration for a conditional handover (CHO), a conditional PSCell addition / change (CPAC), a cell selection procedure, and / or a cell reselection procedure.

[0460] For example, the information about the mobility configuration may include information about a height range to which the mobility configuration applies. For example, the information about the height range may include information about a maximum height, a minimum height, and / or a height boundary.

[0461] For example, the mobility configuration may include information about one or more candidate target cells. When the wireless device is within the altitude range, the one or more candidate target cells may be valid. For example, the one or more candidate target cells may be candidates for CHO, CPAC, cell, cell selection process, and / or cell reselection process.

[0462] For example, the information about the mobility configuration may include information about candidate target cells and information about altitude ranges in which the candidate target cells are valid for mobility.

[0463] For example, the altitude range may be set for each candidate target cell or for each group of one or more candidate target cells.

[0464] For example, the altitude range may be configured per cell, per frequency and / or per radio access technology (RAT).

[0465] In step S1002 , the wireless device may monitor the current altitude of the wireless device.

[0466] For example, the wireless device may determine a current altitude range among a plurality of altitude ranges based on the altitude of the wireless device.

[0467] The wireless device may apply a configuration associated with the current altitude range. For example, the configuration associated with the current altitude range may include a measurement configuration.

[0468] For example, when the current altitude range is different from the previous altitude range, the wireless device may apply the measurement configuration associated with the current altitude range. In other words, after changing the altitude range of the wireless device, the wireless device may apply the configuration associated with the current altitude range.

[0469] In step S1003 , based on the current altitude of the wireless device being within the altitude range, the wireless device may evaluate at least one condition for mobility based on the mobility configuration.

[0470] For example, the mobility may be conditional handover (CHO) and / or conditional PSCell addition / change (CPAC). In this case, when the wireless device is within the altitude range, the wireless device may determine whether at least one condition for CHO and / or CPAC is met. If at least one condition is met, the wireless device may perform CHO and / or CPAC as in step S1004.

[0471] For example, the mobility may be a cell selection process and / or a cell reselection process. In this case, when the wireless device is within the altitude range, the wireless device may determine whether at least one condition for cell selection and / or cell reselection is met. If at least one condition is met, the wireless device may perform cell selection and / or cell reselection as in step S1004. For example, the wireless device may select or reselect a target cell. The wireless device may camp on the target cell.

[0472] In step S1004 , the wireless device may perform mobility to a target cell among one or more candidate target cells based on the evaluation.

[0473] For example, when the wireless device evaluates that a target cell satisfies at least one condition, the wireless device may perform mobility to the target cell.

[0474] For example, when the wireless device evaluates that two or more target cells satisfy at least one condition, the wireless device may determine one target cell among the two or more target cells based on the mobility configuration. The wireless device may perform mobility to the determined target cell.

[0475] According to some embodiments of the present disclosure, the information about the mobility configuration may include information about a first cell group of candidate target cells associated with a first height range and a second cell group of candidate target cells associated with a second height range.

[0476] Based on the current altitude of the wireless device being within the first altitude range, the wireless device may determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying the at least one condition for mobility, the wireless device may perform mobility to a cell included in the first cell group.

[0477] Based on the current height of the wireless device being within the first height range, the wireless device may determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying at least one condition for mobility, the wireless device may perform mobility to a cell included in the second cell group.

[0478] For example, at least one cell may be included in both the first cell group and the second cell group.

[0479] In addition, for example, at least one cell may be included in only one of the first cell group and the second cell group.

[0480] According to some embodiments of the present disclosure, a wireless device may communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0481] For example, the wireless device is a mobile device capable of vertical movement.

[0482] In the following, some embodiments of a method for altitude-based mobility in a wireless communication system are described.

[0483] The network may configure the allowed height for the target cell where reselection or conditional mobility may be performed. There are three options for configuring the allowed height.

[0484] 1) The height may indicate the maximum height at which the cell is allowed to reselect or perform conditional mobility.

[0485] 2) The height may indicate the minimum height at which the cell is allowed to reselect or perform conditional mobility.

[0486] 3) The altitude may indicate the altitude boundary at which reselection is allowed or conditional mobility is performed.

[0487] The target cell given for the allowed height may be indicated per cell, per frequency or per RAT.

[0488] The allowed height may be set for each target cell, or may be set by grouping several target cells.

[0489] 1) The allowed height is configured per cell / frequency / RAT.

[0490] 2) The allowed height is configured per group of several cells / frequencies / RATs.

[0491] If the cell / frequency / RAT is not configured with an allowed height, then

[0492] 1) The cell / frequency / RAT may not be available in airplane mode, or

[0493] 2) Cells / frequencies / RATs will be available at any altitude.

[0494] The UE may perform reselection or conditional mobility for an allowed cell / frequency / RAT at the current altitude. There are some examples.

[0495] According to some embodiments of the present disclosure, a wireless device may receive a first configuration including mobility condition parameters. The mobility condition parameters may include cell reselection related parameters. The mobility condition parameters may include CHO related parameters, which include at least mobility execution and target cell configuration.

[0496] The wireless device may receive a second configuration including altitude information and applicable target cell information. The altitude information may indicate a list of altitude ranges. The applicable target cell information may indicate one or more target cells applicable within a given altitude range. The applicable target cells for a given range may be indicated per cell, per frequency, or per RAT.

[0497] The wireless device may determine a current altitude. If the target cell is considered applicable at the current altitude, the wireless device may evaluate the mobility condition about the target cell based on the first configuration. Based on the second configuration, if the target cell is applicable to an altitude range including the current altitude, the target cell may be considered applicable.

[0498] Fig.11 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0499] Specifically, Fig.11 The case of conditional mobility with a minimum altitude threshold is illustrated.

[0500] exist Fig.11 In the example, a minimum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0501] (1) On the ground, the UE evaluates cell C for conditional mobility.

[0502] (2) When the UE is in the flight mode in the air, the UE stops evaluating cell C for conditional mobility and removes cell C from the evaluation list for conditional mobility.

[0503] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE adds cell A to the evaluation list for conditional mobility and starts evaluating cell A.

[0504] (4) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE adds cell B to the evaluation list for conditional mobility and starts evaluating cell B.

[0505] Fig.12An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0506] Specifically, Fig.12 The case of conditional mobility with a minimum altitude threshold is illustrated.

[0507] exist Fig.12 In the example, the minimum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0508] (1) On the ground, the UE evaluates cell C for conditional mobility.

[0509] (2) When the airborne UE is at an altitude higher than the allowed altitude for cell A, the UE starts evaluating cell A for conditional mobility and adds cell A to the evaluation list for conditional mobility.

[0510] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE adds cell B to the evaluation list for conditional mobility and starts evaluating cell B.

[0511] Fig.13 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0512] Specifically, Fig.13 The case of conditional mobility with a minimum altitude threshold is illustrated.

[0513] exist Fig.13 In the example, a minimum allowed altitude is configured for conditional mobility. That is, it affects all cells / frequencies / RATs configured for conditional mobility. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0514] (1) On the ground, the UE does not evaluate conditional mobility.

[0515] (2) When the airborne UE is at an altitude higher than the allowed altitude for conditional mobility, the UE adds cell A, cell B, and cell C to the evaluation list for the conditional list and starts evaluating cell A, cell B, and cell C.

[0516] Fig.14 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0517] Specifically, Fig.14 The case of conditional mobility with a minimum altitude threshold is illustrated.

[0518] exist Fig.14 In the example, the minimum allowed altitude is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0519] (1) On the ground, the UE evaluates cell A for conditional mobility.

[0520] (2) When the UE is in the flight mode in the air, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0521] (3) When the airborne UE is at an altitude higher than the allowed altitude of the group (cell B / cell C) for conditional mobility, the UE adds cell B and cell C to the evaluation list for conditional mobility and starts evaluating cell B and cell C.

[0522] Fig.15 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0523] Specifically, Fig.15 The case of conditional mobility with a minimum altitude threshold is illustrated.

[0524] exist Fig.15 In the example, the minimum allowed height is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any height. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0525] (1) On the ground, the UE evaluates cell A for conditional mobility.

[0526] (2) When the airborne UE is at an altitude higher than the allowed altitude of the group (cell B / cell C) for conditional mobility, the UE adds cell A, cell B and cell C to the evaluation list for conditional mobility and starts evaluating cell A, cell B and cell C.

[0527] Fig.16 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0528] Specifically, Fig.16 The case of conditional mobility with a maximum altitude threshold is illustrated.

[0529] exist Fig.16 In the example, the maximum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0530] (1) On the ground, the UE evaluates cell A, cell B, and cell C for conditional mobility.

[0531] (2) When the UE is in the flight mode in the air, the UE stops evaluating cell C for conditional mobility and removes cell C from the evaluation list for conditional mobility.

[0532] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0533] (4) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE stops evaluating cell B for conditional mobility and removes cell B from the evaluation list for conditional mobility.

[0534] Fig.17 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0535] Specifically, Fig.17 The case of conditional mobility with a maximum altitude threshold is illustrated.

[0536] exist Fig.17 In the example, the maximum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0537] (1) On the ground, the UE evaluates cell A, cell B, and cell C for conditional mobility.

[0538] (2) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0539] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE stops evaluating cell B for conditional mobility and removes cell B from the evaluation list for conditional mobility.

[0540] Fig.18 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0541] Specifically, Fig.18 The case of conditional mobility with a maximum altitude threshold is illustrated.

[0542] exist Fig.18 In the example, the maximum allowed altitude is configured for conditional mobility. That is, it affects all cells / frequencies / RATs configured for conditional mobility. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0543] (1) On the ground, the UE evaluates cell A, cell B, and cell C for conditional mobility.

[0544] (2) When the airborne UE is at an altitude higher than the allowed altitude for conditional mobility, the UE stops evaluating cell A, cell B, and cell C for conditional mobility and removes cell A, cell B, and cell C from the evaluation list for conditional mobility.

[0545] Fig.19 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0546] Specifically, Fig.19 The case of conditional mobility with a maximum altitude threshold is illustrated.

[0547] exist Fig.19 In the example, the minimum allowed altitude is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0548] (1) On the ground, the UE evaluates cell A, cell B, and cell C for conditional mobility.

[0549] (2) When the UE is in the flight mode in the air, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0550] (3) When the airborne UE is located at an altitude higher than the allowed altitude of the group (cell B / cell C) for conditional mobility, the UE stops evaluating cell B and cell C for conditional mobility and removes cell B and cell C from the evaluation list for conditional mobility.

[0551] Fig. 20 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0552] Specifically, Fig. 20 The case of conditional mobility with a maximum altitude threshold is illustrated.

[0553] exist Fig. 20 In the example, the minimum allowed height is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any height. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0554] (1) On the ground, the UE evaluates cell A, cell B, and cell C for conditional mobility.

[0555] (2) When the airborne UE is located at an altitude higher than the allowed altitude of the group (cell B / cell C) for conditional mobility, the UE stops evaluating cell B and cell C for conditional mobility and removes cell B and cell C from the evaluation list for conditional mobility.

[0556] Fig.21 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0557] Specifically, Fig.21 The case of conditional mobility with a high degree of bounds is illustrated.

[0558] exist Fig.21 In the example, the maximum allowed altitude and minimum allowed altitude are configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0559] (1) On the ground, the UE evaluates cell C for conditional mobility.

[0560] (2) When the UE is in the flight mode in the air, the UE stops evaluating cell C for conditional mobility and removes cell C from the evaluation list for conditional mobility.

[0561] (3) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell A, the UE adds cell A to the evaluation list for conditional mobility and starts evaluating cell A.

[0562] (4) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell A, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0563] (5) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell B, the UE adds cell B to the evaluation list for conditional mobility and starts evaluating cell B.

[0564] (6) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell B, the UE stops evaluating cell B for conditional mobility and removes cell B from the evaluation list for conditional mobility.

[0565] Fig. 22 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0566] Specifically, Fig. 22 The case of conditional mobility with a high degree of bounds is illustrated.

[0567] exist Fig. 22 In the example, the maximum allowed altitude and minimum allowed altitude are configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0568] (1) On the ground, the UE evaluates cell C for conditional mobility.

[0569] (2) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell A, the UE adds cell A to the evaluation list for conditional mobility and starts evaluating cell A for conditional mobility.

[0570] (3) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell A, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility.

[0571] (4) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell B, the UE adds cell B to the evaluation list for conditional mobility and starts evaluating cell B.

[0572] (5) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE stops evaluating cell B for conditional mobility and removes cell B from the evaluation list for conditional mobility.

[0573] Fig.23 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0574] Specifically, Fig.23 The case of conditional mobility with a high degree of bounds is illustrated.

[0575] exist Fig.23 In the example, the maximum allowed altitude and minimum allowed altitude are configured for conditional mobility. That is, it affects all cells / frequencies / RATs configured for conditional mobility. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0576] (1) On the ground, the UE does not evaluate conditional mobility.

[0577] (2) When the airborne UE is at an altitude higher than the minimum allowed altitude for conditional mobility, the UE adds cell A, cell B and cell C to the evaluation list for conditional mobility and starts evaluating cell A, cell B and cell C.

[0578] (3) When the airborne UE is at an altitude higher than the maximum allowed altitude for conditional mobility, the UE stops evaluating cell A, cell B and cell C for conditional mobility and removes cell A, cell B and cell C from the evaluation list for conditional mobility.

[0579] Fig.24 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0580] Specifically, Fig.24 The case of conditional mobility with a high degree of bounds is illustrated.

[0581] exist Fig.24 In the example, the maximum allowed altitude and the minimum allowed altitude are configured to group several cells / frequencies / RATs among cells of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0582] (1) On the ground, the UE evaluates cell A for conditional mobility.

[0583] (2) When the UE is in the flight mode while in the air, the UE stops evaluating cell A for conditional mobility and removes cell A from the evaluation list for conditional mobility because cell A is not available in the flight mode.

[0584] (3) When the airborne UE is at an altitude higher than the minimum allowed altitude of the group (cell B / cell C) for conditional mobility, the UE adds cell B and cell C to the evaluation list for conditional mobility and starts evaluating cell B and cell C.

[0585] (4) When the airborne UE is at an altitude higher than the maximum allowed altitude of the group (cell B / cell C) for conditional mobility, the UE stops evaluating cell B and cell C for conditional mobility and removes cell B and cell C from the evaluation list for conditional mobility.

[0586] Fig.25 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0587] Specifically, Fig.25 The case of conditional mobility with a high degree of bounds is illustrated.

[0588] exist Fig.25 In the example, the maximum allowed altitude and the minimum allowed altitude are configured to group multiple cells / frequencies / RATs among cells of conditional mobility. If the cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0589] (1) On the ground, the UE evaluates cell A for conditional mobility.

[0590] (2) When the airborne UE is at an altitude higher than the minimum allowed altitude of the group (cell B / cell C) for conditional mobility, the UE adds cell B and cell C to the evaluation list for conditional mobility and starts evaluating cell B and cell C.

[0591] (3) When the airborne UE is at an altitude higher than the maximum allowed altitude of the group (cell B / cell C) for conditional mobility, the UE stops evaluating cell B and cell C for conditional mobility and removes cell B and cell C from the evaluation list for conditional mobility.

[0592] Fig.26 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0593] Specifically, Fig.26 The case of reselection with a minimum height threshold is illustrated.

[0594] exist Fig.26 In the example, a minimum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0595] (1) On the ground, the UE evaluates cell C for reselection.

[0596] (2) When the UE is in flight mode, the UE cannot reselect to cell C.

[0597] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE may reselect to cell A based on the reselection criteria.

[0598] (4) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE may reselect to cell B based on the reselection criteria.

[0599] Fig. 27 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0600] Specifically, Fig. 27 The case of reselection with a minimum height threshold is illustrated.

[0601] exist Fig. 27 In the example, the minimum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0602] (1) On the ground, the UE evaluates cell C for reselection.

[0603] (2) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE may reselect to cell A based on the reselection criteria.

[0604] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE may reselect to cell B based on the reselection criteria.

[0605] Fig.28 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0606] Specifically, Fig.28 The case of reselection with a minimum height threshold is illustrated.

[0607] exist Fig.28 In the example, the minimum allowed altitude is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0608] (1) On the ground, the UE evaluates cell A for reselection.

[0609] (2) When the UE is in flight mode, the UE cannot reselect to cell A.

[0610] (3) When the airborne UE is located at an altitude higher than the allowed altitude for the reselected group (cell B / cell C), the UE may reselect cell B or cell C based on the reselection criteria.

[0611] Fig.29 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0612] Specifically, Fig.29 The case of reselection with a minimum height threshold is illustrated.

[0613] exist Fig.29 In the example, the minimum allowed height is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any height. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0614] (1) On the ground, the UE evaluates cell C for reselection.

[0615] (2) When the airborne UE is located at an altitude higher than the allowed altitude for the reselected group (cell B / cell C), the UE may reselect cell A, cell B, or cell C based on the reselection criteria.

[0616] Fig.30 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0617] Specifically, Fig.30 The case of reselection with a maximum height threshold is illustrated.

[0618] exist Fig.30In the example, the maximum allowed altitude is configured for each cell / frequency / RAT. If the altitude is not configured for a cell / frequency / RAT, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0619] (1) On the ground, the UE evaluates cell A, cell B, and cell C for reselection.

[0620] (2) When the UE is in flight mode, the UE cannot reselect to cell C.

[0621] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE cannot reselect to cell A.

[0622] (4) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE cannot reselect to cell B.

[0623] Fig.31 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0624] Specifically, Fig.31 The case of reselection with a maximum height threshold is illustrated.

[0625] exist Fig.31 In the example, the maximum allowed altitude is configured for each cell / frequency / RAT. If no altitude is configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0626] (1) On the ground, the UE evaluates cell A, cell B, and cell C for reselection.

[0627] (2) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE cannot reselect to cell A.

[0628] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE cannot reselect to cell B.

[0629] Fig.32 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0630] Specifically, Fig.32 The case of reselection with a maximum height threshold is illustrated.

[0631] exist Fig.32In the example, the minimum allowed altitude is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0632] (1) On the ground, the UE evaluates cell A, cell B, and cell C for reselection.

[0633] (2) When the UE is in flight mode, the UE cannot reselect to cell A.

[0634] (3) When the airborne UE is located at an altitude higher than the allowed altitude for the reselected group (cell B / cell C), the UE cannot reselect to cell B and cell C.

[0635] Fig.33 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0636] Specifically, Fig.33 The case of reselection with a maximum height threshold is illustrated.

[0637] exist Fig.33 In the example, the minimum allowed height is configured to group multiple cells / frequencies / RATs among cells / frequencies / RATs of conditional mobility. If a cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any height. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0638] (1) On the ground, the UE evaluates cell A, cell B, and cell C for reselection.

[0639] (2) When the airborne UE is located at an altitude higher than the allowed altitude for the reselected group (cell B / cell C), the UE cannot reselect to cell B and cell C.

[0640] Fig.34 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0641] Specifically, Fig.34 The case of reselection with a height boundary is illustrated.

[0642] exist Fig.34In the example, the maximum allowed altitude and minimum allowed altitude are configured for each cell / frequency / RAT. If no altitude is configured for a cell / frequency / RAT, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0643] (1) On the ground, the UE evaluates cell C for reselection.

[0644] (2) When the UE is in flight mode, the UE cannot reselect to cell C.

[0645] (3) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell A, the UE may reselect to cell A based on the reselection criteria.

[0646] (4) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell A, the UE cannot reselect to cell A.

[0647] (5) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell B, the UE may reselect to cell B based on the reselection criteria.

[0648] (6) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell B, the UE cannot reselect to cell B.

[0649] Fig.35 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0650] Specifically, Fig.35 The case of reselection with a height boundary is illustrated.

[0651] exist Fig.35 In the example, the maximum allowed altitude and minimum allowed altitude are configured for each cell / frequency / RAT. If no altitude is configured for a cell / frequency / RAT, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with frequency or RAT based on network configuration.

[0652] (1) On the ground, the UE evaluates cell C for reselection.

[0653] (2) When the airborne UE is located at an altitude higher than the maximum allowed altitude for cell A, the UE may reselect to cell A based on reselection criteria.

[0654] (3) When the airborne UE is located at an altitude higher than the allowed altitude for cell A, the UE cannot reselect to cell A.

[0655] (4) When the airborne UE is located at an altitude higher than the minimum allowed altitude for cell B, the UE may reselect to cell B based on the reselection criteria.

[0656] (5) When the airborne UE is located at an altitude higher than the allowed altitude for cell B, the UE cannot reselect to cell B.

[0657] Fig.36 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0658] Specifically, Fig.36 The case of reselection with a height boundary is illustrated.

[0659] exist Fig.36 In the example, the maximum allowed altitude and the minimum allowed altitude are configured to group multiple cells / frequencies / RATs among the cells / frequencies / RATs of conditional mobility. If the cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is not available in flight mode. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0660] (1) On the ground, the UE evaluates cell A for reselection.

[0661] (2) When the UE is in flight mode, the UE cannot reselect to cell A.

[0662] (3) When the airborne UE is located at an altitude higher than the minimum allowed altitude of the group (cell B / cell C) for reselection, the UE may reselect cell B or cell C based on the reselection criteria.

[0663] (4) When the airborne UE is located at an altitude higher than the maximum allowed altitude of the group (cell B / cell C) for reselection, the UE cannot reselect to cell B and cell C.

[0664] Fig.37 An example of a method for altitude procedure based mobility in a wireless communication system according to some embodiments of the present disclosure is shown.

[0665] Specifically, Fig.37 The case of reselection with a height boundary is illustrated.

[0666] exist Fig.37 In the example, the maximum allowed altitude and the minimum allowed altitude are configured to group multiple cells / frequencies / RATs among the cells / frequencies / RATs of conditional mobility. If the cell / frequency / RAT is not configured with a group, the cell / frequency / RAT is available at any altitude. This example is for a cell. It can be replaced with a frequency or RAT based on the network configuration.

[0667] (1) On the ground, the UE evaluates cell A for conditional mobility.

[0668] (2) When the airborne UE is located at an altitude higher than the minimum allowed altitude of the group (cell B / cell C) for reselection, the UE may reselect cell B or cell C based on the reselection criteria.

[0669] (3) When the airborne UE is located at an altitude higher than the maximum allowed altitude of the group (cell B / cell C) for reselection, the UE cannot reselect to cell B and cell C.

[0670] Figures 10 to 37 Some of the detailed steps in the specific steps shown in the example may not be necessary steps and may be omitted. Figures 10 to 37 In addition to the steps shown, other steps may be added, and the order of the steps may be changed. Some of the above steps may have their own technical meanings.

[0671] Hereinafter, a device for high-speed mobility in a wireless communication system according to some embodiments of the present disclosure will be described. In this document, the device may be Figure 2 , Figure 3 and Figure 5 A wireless device (100 or 200) in.

[0672] For example, the wireless device may perform the above method. Detailed descriptions overlapping with the above content may be simplified or omitted.

[0673] Reference Figure 5 , the wireless device 100 may include a processor 102 , a memory 104 , and a transceiver 106 .

[0674] According to some embodiments of the present disclosure, the processor 102 may be configured to be operatively coupled with the memory 104 and the transceiver 106 .

[0675] The processor 102 may be configured to control the transceiver 106 to receive information about a mobility configuration associated with an altitude range. The processor 102 may be configured to monitor a current altitude of the wireless device. The processor 102 may be configured to evaluate at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range. The processor 102 may be configured to perform mobility to a target cell among one or more candidate target cells based on the evaluation. The mobility configuration may include information about the one or more candidate target cells.

[0676] For example, mobility may include conditional handover (CHO) and / or conditional PSCell addition / change (CPAC).

[0677] For example, the step of performing mobility to the target cell may include: selecting or reselecting the target cell; and camping on the target cell.

[0678] For example, the information about the mobility configuration may include information about the altitude range to which the mobility configuration is applicable.

[0679] For example, information about the altitude range may include information about a maximum altitude, a minimum altitude, and / or altitude boundaries.

[0680] For example, the information about the mobility configuration may include information about candidate target cells and information about altitude ranges in which the candidate target cells are valid for mobility.

[0681] For example, the altitude range may be set for each candidate target cell or for each group of one or more candidate target cells.

[0682] For example, the altitude range may be configured per cell, per frequency and / or per radio access technology (RAT).

[0683] According to some embodiments of the present disclosure, the information about the mobility configuration may include information about a first cell group of candidate target cells associated with a first height range and a second cell group of candidate target cells associated with a second height range.

[0684] Based on the current height of the wireless device being within the first height range, the processor 102 may be configured to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying at least one condition for mobility, the processor 102 may be configured to perform mobility to a cell included in the first cell group.

[0685] Based on the current height of the wireless device being within the first height range, the processor 102 may be configured to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying at least one condition for mobility, the processor 102 may be configured to perform mobility to a cell included in the second cell group.

[0686] For example, the wireless device may be a mobile device capable of vertical movement.

[0687] For example, the processor 102 may be configured to control the transceiver 106 to communicate with at least one of a user device other than the wireless apparatus, a network, or an autonomous vehicle.

[0688] Hereinafter, a processor for a wireless device based on high mobility in a wireless communication system according to some embodiments of the present disclosure will be described.

[0689] The processor may be configured to control the wireless device to receive information about a mobility configuration associated with an altitude range. The processor may be configured to control the wireless device to monitor a current altitude of the wireless device. The processor may be configured to control the wireless device to evaluate at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range. The processor may be configured to control the wireless device to perform mobility to a target cell among one or more candidate target cells based on the evaluation. The mobility configuration may include information about the one or more candidate target cells.

[0690] For example, mobility may include conditional handover (CHO) and / or conditional PSCell addition / change (CPAC).

[0691] For example, the step of performing mobility to the target cell may include: selecting or reselecting the target cell; and camping on the target cell.

[0692] For example, the information about the mobility configuration may include information about the altitude range to which the mobility configuration is applicable.

[0693] For example, information about the altitude range may include information about a maximum altitude, a minimum altitude, and / or an altitude boundary.

[0694] For example, the information about the mobility configuration may include information about the candidate target cells and information about the altitude ranges in which the candidate target cells are valid for mobility.

[0695] For example, the altitude range may be set for each candidate target cell or for each group of one or more candidate target cells.

[0696] For example, the altitude range may be configured per cell, per frequency and / or per radio access technology (RAT).

[0697] According to some embodiments of the present disclosure, the information about the mobility configuration may include information about a first cell group of candidate target cells associated with a first height range and a second cell group of candidate target cells associated with a second height range.

[0698] Based on the current altitude of the wireless device being within the first altitude range, the processor may be configured to control the wireless device to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying the at least one condition for mobility, the processor may be configured to control the wireless device to perform mobility to a cell included in the first cell group.

[0699] Based on the current altitude of the wireless device being within the first altitude range, the processor may be configured to control the wireless device to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying the at least one condition for mobility, the processor may be configured to control the wireless device to perform mobility to a cell included in the second cell group.

[0700] For example, the wireless device may be a mobile device capable of vertical movement.

[0701] For example, the processor may be configured to control the wireless device to communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0702] Hereinafter, a non-transitory computer-readable medium having stored thereon a plurality of instructions for altitude-based mobility in a wireless communication system according to some embodiments of the present disclosure will be described.

[0703] According to some embodiments of the present disclosure, the technical features of the present disclosure may be directly implemented in hardware, in software executed by a processor, or in a combination of the two. For example, a method performed by a wireless device in wireless communication may be implemented in hardware, software, firmware, or any combination thereof. For example, the software may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other storage medium.

[0704] Some examples of storage media are coupled to a processor so that the processor can read information from the storage media. In an alternative, the storage medium can be integrated into the processor. The processor and the storage medium can reside in an ASIC. For another example, the processor and the storage medium can reside as discrete components.

[0705] The computer-readable medium may include tangible and non-transitory computer-readable storage media.

[0706] 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 foregoing.

[0707] Additionally, the methods described herein may be implemented at least in part by a computer-readable communication medium that carries or communicates code in the form of instructions or data structures and that can be accessed, read, and / or executed by a computer.

[0708] According to some embodiments of the present disclosure, a plurality of instructions are stored on a non-transitory computer-readable medium, and the plurality of stored instructions may be executed by a processor of a wireless device.

[0709] The stored plurality of instructions may cause the wireless device to receive information about a mobility configuration associated with an altitude range. The stored plurality of instructions may cause the wireless device to monitor a current altitude of the wireless device. The stored plurality of instructions may cause the wireless device to evaluate at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range. The stored plurality of instructions may cause the wireless device to perform mobility to a target cell among one or more candidate target cells based on the evaluation. The mobility configuration may include information about the one or more candidate target cells.

[0710] For example, mobility may include conditional handover (CHO) and / or conditional PSCell addition / change (CPAC).

[0711] For example, the step of performing mobility to the target cell may include: selecting or reselecting the target cell; and camping on the target cell.

[0712] For example, the information about the mobility configuration may include information about the altitude range to which the mobility configuration is applicable.

[0713] For example, information about the altitude range may include information about a maximum altitude, a minimum altitude, and / or altitude boundaries.

[0714] For example, the information about the mobility configuration may include information about candidate target cells and information about altitude ranges in which the candidate target cells are valid for mobility.

[0715] For example, the altitude range may be set for each candidate target cell or for each group of one or more candidate target cells.

[0716] For example, the altitude range may be configured per cell, per frequency and / or per radio access technology (RAT).

[0717] According to some embodiments of the present disclosure, the information about the mobility configuration may include information about a first cell group of candidate target cells associated with a first height range and a second cell group of candidate target cells associated with a second height range.

[0718] Based on the current altitude of the wireless device being within the first altitude range, the stored plurality of instructions may cause the wireless device to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying the at least one condition for mobility, the stored plurality of instructions may cause the wireless device to perform mobility to a cell included in the first cell group.

[0719] Based on the current altitude of the wireless device being within the first altitude range, the stored plurality of instructions may cause the wireless device to determine whether at least one condition for mobility is satisfied only for the first cell group. Based on satisfying the at least one condition for mobility, the stored plurality of instructions may cause the wireless device to perform mobility to a cell included in the second cell group.

[0720] For example, the wireless device may be a mobile device capable of vertical movement.

[0721] For example, the stored plurality of instructions may cause the wireless device to communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0722] Hereinafter, a method for altitude-based mobility in a wireless communication system performed by a base station (BS) according to some embodiments of the present disclosure will be described.

[0723] The BS may provide the wireless device with information about a mobility configuration associated with the altitude range. The mobility configuration may include information about one or more candidate target cells. The information about the mobility configuration may include information about the altitude range to which the mobility configuration applies.

[0724] Hereinafter, a base station (BS) for altitude-based mobility in a wireless communication system according to some embodiments of the present disclosure will be described.

[0725] The BS may include a transceiver, a memory, and a processor operatively coupled to the transceiver and the memory.

[0726] The processor may be configured to control the transceiver to provide information about a mobility configuration associated with an altitude range to the wireless device. The mobility configuration may include information about one or more candidate target cells. The information about the mobility configuration may include information about an altitude range to which the mobility configuration applies.

[0727] The present disclosure may have various beneficial effects.

[0728] According to some embodiments of the present disclosure, a wireless device may efficiently perform conditional mobility according to an altitude-based mobility configuration.

[0729] For example, depending on the UE's altitude, the UE may perform reselection of a suitable cell (eg, a UAV-specific cell or a nearby cell) or perform conditional mobility to a suitable cell.

[0730] In other words, the UE may reselect a suitable cell (eg, a UAV-specific cell or a nearby cell) or perform conditional mobility to a suitable cell according to the altitude.

[0731] For example, by selecting candidate target cells based on the height of the wireless device, it can perform efficient mobility (eg, CHO and / or CPAC).

[0732] For example, the wireless device may save resources by preventing mobility to unsuitable cells.

[0733] According to some embodiments of the present disclosure, a wireless network system may provide an efficient solution for altitude-based mobility.

[0734] The advantageous effects that can be obtained by the specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be various technical effects that can be understood by a person skilled in the relevant art and / or derived from the present disclosure. Therefore, the specific effects of the present 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 the present disclosure.

[0735] The claims in this disclosure may be combined in various ways. For example, the technical features in the method claims of this disclosure may be combined to be implemented or performed in a device, and the technical features in the device claims may be combined to be implemented or performed in a method. In addition, the technical features in the method claims and the device claims may be combined to be implemented or performed in a device. In addition, the technical features in the method claims and the device claims may be combined to be implemented or performed in a method. Other implementations are within the scope of the appended claims.

Claims

1. A method performed by a wireless device in a wireless communication system, the method The following steps are involved: receiving information regarding a mobility configuration associated with an altitude range; monitoring a current altitude of the wireless device; evaluating at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range; and performing mobility to a target cell among one or more candidate target cells based on the evaluation, The mobility configuration includes information about the one or more candidate target cells.

2. The method according to claim 1, in, The mobility includes conditional switching of CHO and / or conditional PSCell addition / change of CPAC.

3. The method according to claim 1, in, The steps to perform mobility to a target cell include: Selecting or reselecting the target cell; and Camp on the target cell.

4. The method according to claim 1, in, The information about the mobility configuration comprises information about the altitude range for which the mobility configuration is applicable.

5. The method according to claim 4, in, The information about the altitude range comprises information about a maximum altitude, a minimum altitude and / or an altitude boundary.

6. The method according to claim 1, in, The information about the mobility configuration includes information about candidate target cells and information about altitude ranges in which the candidate target cells are valid for the mobility.

7. The method according to claim 1, in, The altitude range is set for each candidate target cell or for each group of one or more candidate target cells.

8. The method according to claim 1, in, The altitude range is configured per cell, per frequency and / or per radio access technology RAT.

9. The method according to claim 1, in, The information about the mobility configuration includes information about a first cell group of candidate target cells associated with a first height range and a second cell group of candidate target cells associated with a second height range.

10. The method according to claim 9, in, The method further comprises the following steps: Based on the current altitude of the wireless device being within the first altitude range, it is determined whether at least one condition for mobility is satisfied only for the first cell group.

11. The method according to claim 10, in, The method further comprises the following steps: The mobility to a cell included in the first cell group is performed based on satisfying the at least one condition for the mobility.

12. The method according to claim 9, in, The method further comprises the following steps: Based on the current altitude of the wireless device being within the first altitude range, it is determined whether at least one condition for mobility is satisfied only for the first cell group.

13. The method according to claim 12, in, The method further comprises the following steps: The mobility to a cell included in the second cell group is performed based on satisfying the at least one condition for the mobility.

14. The method according to claim 1, in, The wireless device is a mobile device capable of vertical movement.

15. The method according to claim 1, in, The wireless device communicates with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

16. A wireless device in a wireless communication system, the wireless device include: Transceiver; Memory; as well as at least one processor operatively coupled to the transceiver and the memory and adapted to: controlling the transceiver to receive information regarding a mobility configuration associated with an altitude range; monitoring a current altitude of the wireless device; evaluating at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range; and performing mobility to a target cell among one or more candidate target cells based on the evaluation, The mobility configuration includes information about the one or more candidate target cells.

17. The wireless device according to claim 16, in, The mobility includes conditional switching of CHO and / or conditional PSCell addition / change of CPAC.

18. The wireless device according to claim 16, in, The steps to perform mobility to a target cell include: Selecting or reselecting the target cell; and Camp on the target cell.

19. The wireless device according to claim 16, in, The information about the mobility configuration comprises information about the altitude range for which the mobility configuration is applicable.

20. The wireless device according to claim 19, in, The information about the altitude range comprises information about a maximum altitude, a minimum altitude and / or an altitude boundary.

21. The wireless device according to claim 16, in, The information about the mobility configuration includes information about candidate target cells and information about altitude ranges in which the candidate target cells are valid for the mobility.

22. The wireless device according to claim 16, in, The altitude range is set for each candidate target cell or for each group of one or more candidate target cells.

23. The wireless device according to claim 16, in, The altitude range is configured per cell, per frequency and / or per radio access technology RAT.

24. The wireless device according to claim 16, in, The information about the mobility configuration includes information about a first cell group of candidate target cells associated with a first altitude range and a second cell group of candidate target cells associated with a second altitude range.

25. The wireless device according to claim 24, in, The at least one processor is further adapted to: Based on the current altitude of the wireless device being within the first altitude range, it is determined whether at least one condition for mobility is satisfied only for the first cell group.

26. The wireless device according to claim 25, in, The at least one processor is further adapted to: Mobility to a cell included in the first cell group is performed based on satisfying the at least one condition for the mobility.

27. The wireless device according to claim 24, in, The at least one processor is further adapted to: Based on the current altitude of the wireless device being within the first altitude range, it is determined whether at least one condition for mobility is satisfied only for the first cell group.

28. The wireless device according to claim 27, in, The at least one processor is further adapted to: Mobility to a cell included in the second cell group is performed based on satisfying the at least one condition for the mobility.

29. The wireless device according to claim 16, in, The wireless device is a mobile device capable of vertical movement.

30. The wireless device of claim 16, in, The wireless device communicates with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

31. A processor for a wireless device in a wireless communication system, in, The processor is configured to control the wireless device to perform operations including: receiving information regarding a mobility configuration associated with an altitude range; monitoring a current altitude of the wireless device; Based on the current altitude of the wireless device being within the altitude range, evaluating at least one condition for mobility based on the mobility configuration; and performing mobility to a target cell among one or more candidate target cells based on the evaluation, The mobility configuration includes information about the one or more candidate target cells.

32. A non-transitory computer readable medium storing a plurality of instructions, the plurality of instructions, when executed by a processor of a wireless device, causing the wireless device to perform operations, the operations include: receiving information regarding a mobility configuration associated with an altitude range; monitoring a current altitude of the wireless device; evaluating at least one condition for mobility based on the mobility configuration based on the current altitude of the wireless device being within the altitude range; as well as performing mobility to a target cell among one or more candidate target cells based on the evaluation, The mobility configuration includes information about the one or more candidate target cells.

33. A method performed by a base station in a wireless communication system, the method The following steps are involved: providing information about a mobility configuration associated with an altitude range to a wireless device, wherein the mobility configuration includes information about one or more candidate target cells, and The information about the mobility configuration includes information about the altitude range to which the mobility configuration is applicable.

34. A base station in a wireless communication system, the base station include: Transceiver; Memory; as well as a processor operatively coupled to the transceiver and the memory and adapted to: providing information about a mobility configuration associated with an altitude range to a wireless device, wherein the mobility configuration includes information about one or more candidate target cells, and The information about the mobility configuration includes information about the altitude range to which the mobility configuration is applicable.

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