Execution conditions for multiple types of conditional mobility

Abstract

Methods and apparatus are provided for execution conditions for multiple types of conditional mobility. A wireless device receives a conditional configuration for a target cell from a network. The conditional configuration includes configuration parameters for the target cell, and the configuration parameters include i) a configuration of the target cell, ii) a first execution condition for adding CPA for the conditional primary and secondary cell PSCell, and iii) a second execution condition for changing CPC for the conditional PSCell. Based on whether the PSCell is configured, the wireless device selects one execution condition from the first execution condition and the second execution condition, and applies a configuration of the target cell satisfying the one execution condition.

Description

Technical Field

[0001] The present disclosure relates to execution conditions for various types of conditional mobility. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology for implementing high-speed packet communications. Many solutions have been proposed for the LTE goal, including those aimed at reducing user and provider costs, improving service quality, and expanding and improving coverage and system capacity. 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 as higher-level requirements.

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

[0004] NR targets 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 low latency communications (URLLC), etc. NR should be inherently forward compatible.

[0005] Conditional Handover (CHO) is a new solution that aims to improve the mobility robustness of mobile terminals. In CHO, instead of preparing one target cell as in the conventional case, multiple candidate target cells are prepared in advance in the network, which enables the handover command to be sent to the mobile terminal earlier than in a normal handover when the radio conditions are still good, rather than when the conditions start to deteriorate as in a conventional handover.

[0006] The concept of CHO may be applied to conditional primary secondary cell (PSCell) addition (CPA) and / or conditional PSCell change (CPC). Summary of the invention

[0007] In one aspect, a method performed by a wireless device adapted to operate in a wireless communication system is provided. The method comprises the following steps: receiving a conditional configuration for a target cell from a network. The conditional configuration comprises configuration parameters for the target cell, and the configuration parameters comprise i) the configuration of the target cell, ii) a first execution condition for adding a CPA for a conditional primary and secondary cell (PSCell), and iii) a second execution condition for changing CPC for the conditional PSCell. The method comprises the following steps: selecting an execution condition from the first execution condition and the second execution condition based on whether the PSCell is configured, and applying the configuration of the target cell that satisfies the one execution condition.

[0008] In another aspect, a device for implementing the above method is provided.

[0009] Beneficial Effects

[0010] The present disclosure may have various beneficial effects.

[0011] For example, the UE may use CPA configuration for CPC after PSCell addition, thereby reducing the network signaling required for CPC configuration.

[0012] The beneficial effects that can be obtained by the specific embodiments of the present disclosure are not limited to the beneficial effects listed above. For example, there are 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 effects explicitly described herein, but can include various effects that can be understood or derived from the technical features of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0014] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0015] Figure 3 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0016] Figure 4 and Figure 5 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.

[0017] Figure 6 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0018] Figure 7An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0019] Figure 8 An example of a CPA process to which an implementation of the present disclosure is applied is shown.

[0020] Fig. 9 An example of a method performed by a wireless device to which an implementation of the present disclosure is applied is shown.

[0021] Fig.10 An example of a method executed by a base station to which an implementation of the present disclosure is applied is shown.

[0022] Fig.11 An example of UE operation to which an implementation of the present disclosure is applied is shown.

[0023] Fig.12 An example of a process of applying an implementation of the present disclosure is shown. DETAILED DESCRIPTION

[0024] The following techniques, devices and systems can be applied to various wireless multiple access systems. Examples of these 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 Rate for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (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 the downlink (DL) and SC-FDMA in the uplink (UL). The evolutions of 3GPP LTE include LTE Advanced (LTE-A), LTE-A Pro and / or 5G New Radio (NR).

[0025] For ease of description, the embodiments of the present disclosure are 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.

[0026] 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.

[0027] 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".

[0028] 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".

[0029] 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".

[0030] 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".

[0031] 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 "PDDCH" 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".

[0032] The technical features described separately in one figure in the present disclosure can be implemented separately or simultaneously.

[0033] Although not limited to this, 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).

[0034] 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.

[0035] Figure 1 An example of a communication system to which an embodiment of the present disclosure is applied is shown.

[0036] 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 .

[0037] 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.

[0038] 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 the embodiments of the present disclosure are not limited to the 5G system and may be applied to future communication systems other than the 5G system.

[0039] 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.

[0040] The wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G 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 Internet of Things (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 augmented reality (AR) / virtual reality (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.

[0041] 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 field of the fourth industrial revolution.

[0042] 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., sidelink 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., sensors) or other wireless devices 100a to 100f.

[0043] 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 may be performed based on various proposals of the present disclosure.

[0044] NR supports multiple parameter sets (and / or multiple subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15kHz, wide areas can be supported in traditional cellular bands, and if the SCS is 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. If the SCS is 60kHz or higher, bandwidths greater than 24.25GHz can be supported to overcome phase noise.

[0045] The NR frequency band may be defined as two types of frequency ranges, namely, frequency range 1 (FR1) and frequency range 2 (FR2). The numerical values ​​of the frequency ranges may be changed. For example, the two types of frequency ranges (FR1 and FR2) may be as shown in Table 1 below. For ease of explanation, in the frequency range used in the NR system, FR1 may mean "a range below 6 GHz", FR2 may mean "a range above 6 GHz", and may be referred to as millimeter wave (mmW).

[0046] [Table 1]

[0047] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0048] As mentioned above, the value of the frequency range of the NR system can be changed. For example, FR1 may include 410 MHz to 7125 MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or above. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or above included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes, for example, communication of vehicles (e.g., autonomous driving).

[0049] [Table 2]

[0050] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0051] Here, the radio communication technology implemented in the wireless device in the present disclosure may include narrowband IoT (NB-IoT) technology for low-power communication as well as LTE, NR and 6G. For example, NB-IoT technology may be an example of a 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 names mentioned above. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may be based on LTE-M technology for communication. For example, LTE-M technology may be an example of LPWAN technology and is referred to as various names such as enhanced MTC (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 considering low-power communication, and may not be limited to the names mentioned above. For example, ZigBee technology may generate a personal area network (PAN) associated with small / low-power digital communication based on various specifications such as IEEE 802.15.4, and may be referred to as various names.

[0052] Figure 2 An example of a wireless device to which an embodiment of the present disclosure is applied is shown.

[0053] exist Figure 2 In the embodiment, the first wireless device 100 and / or the second wireless device 200 may be implemented in various forms according to the usage / service. For example, {the first wireless device 100 and the second wireless device 200} may correspond to 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}. The first wireless device 100 and / or the second wireless device 200 may be configured by various elements, devices / components and / or modules.

[0054] The first wireless device 100 may include at least one transceiver, such as the transceiver 106 ; at least one processing chip, such as the processing chip 101 ; and / or one or more antennas 108 .

[0055] The processing chip 101 may include at least one processor, such as the processor 102, and at least one memory, such as the memory 104. Additionally and / or alternatively, the memory 104 may be placed outside the processing chip 101.

[0056] The processor 102 may control the memory 104 and / or the transceiver 106 and may be adapted to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts described in the present disclosure. For example, the processor 102 may process the information in the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal through the transceiver 106. The processor 102 may receive a radio signal including a second information / signal through the transceiver 106 and then store information obtained by processing the second information / signal in the memory 104.

[0057] 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 firmware and / or software code 105 that implements codes, commands, and / or sets of commands that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 105 may implement instructions that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 105 may control the processor 102 to execute one or more protocols. For example, the firmware and / or software code 105 may control the processor 102 to execute one or more layers of a radio interface protocol.

[0058] 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 send 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.

[0059] The second wireless device 200 may include at least one transceiver, such as the transceiver 206 ; at least one processing chip, such as the processing chip 201 ; and / or one or more antennas 208 .

[0060] 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. Additionally and / or alternatively, the memory 204 may be placed outside the processing chip 201.

[0061] The processor 202 may control the memory 204 and / or the transceiver 206 and may be adapted to implement the descriptions, functions, processes, suggestions, methods and / or operational flow charts 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.

[0062] 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 firmware and / or software code 205 that implements codes, commands, and / or sets of commands that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the firmware and / or software code 205 may control the processor 202 to execute one or more protocols. For example, the firmware and / or software code 205 may control the processor 202 to execute one or more layers of a radio interface protocol.

[0063] In this document, 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 send 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.

[0064] Hereinafter, 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 physical (PHY), layer, medium access control (MAC) layer, radio link control (RLC) layer, packet data convergence protocol (PDCP) layer, radio resource control (RRC) layer, and service data adaptation protocol (SDAP) layer). One or more processors 102 and 202 may generate one or more protocol data units (PDUs), one or more service data units (SDUs), messages, control information, data, or information according to the descriptions, functions, processes, suggestions, methods, and / or operation flow charts disclosed in the present disclosure. The 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, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure.

[0065] 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. For example, one or more processors 102 and 202 may be configured by a collection of a communication control processor, an application processor (AP), an electronic control unit (ECU), a central processing unit (CPU), a graphics processing unit (GPU), and a memory control processor. 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.

[0066] The one or more memories 104 and 204 may be configured by random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EPROM), flash memory, volatile memory and non-volatile memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. The one or more memories 104 and 204 may be located inside and / or outside the one or more processors 102 and 202. The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as wired or wireless connections.

[0067] One or more transceivers 106 and 206 may 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 may 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 may 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 may perform control so that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.

[0068] One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208. Additionally and / or alternatively, one or more transceivers 106 and 206 may include one or more antennas 108 and 208. One or more transceivers 106 and 206 may be adapted 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. In the present disclosure, one or more antennas 108 and 208 may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0069] The one or more transceivers 106 and 206 may convert received user data, control information, radio signals / channels, etc. from RF band signals to baseband signals so as to process the received user data, control information, radio signals / channels, etc. using the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert the user data, control information, radio signals / channels, etc. processed using the one or more processors 102 and 202 from baseband signals to RF band signals. To this end, the one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, the one or more transceivers 106 and 206 may up-convert OFDM baseband signals to OFDM signals through their (analog) oscillators and / or filters under the control of the one or more processors 102 and 202 and transmit the up-converted OFDM signals at the carrier frequency. The one or more transceivers 106 and 206 may receive an OFDM signal at a carrier frequency and down-convert the OFDM signal to an OFDM baseband signal through their (analog) oscillators and / or filters under the control of the one or more processors 102 and 202 .

[0070] Although in Figure 2 140 , but the wireless devices 100 and 200 may further include additional components. The additional components 140 may be configured differently depending on the type of the wireless devices 100 and 200. For example, the additional components 140 may include at least one of a power unit / battery, an input / output (I / O) device (e.g., an audio I / O port, a video I / O port), a drive device, and a computing device. The additional components 140 may be coupled to the one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0071] In an embodiment of the present disclosure, a UE may operate as a transmitting device in UL and as a receiving device in DL. In an embodiment of the present disclosure, a BS may operate as a receiving device in UL and as a transmitting device in DL. In the following, for the convenience of description, it is mainly assumed that the first wireless device 100 is a UE and the second wireless device 200 is a BS. For example, the processor 102 connected to, installed on, or started in the first wireless device 100 may be suitable for executing the UE behavior according to the embodiment of the present disclosure or controlling the transceiver 106 to execute the UE behavior according to the embodiment of the present disclosure. The processor 202 connected to, installed on, or started in the second wireless device 200 may be suitable for executing the BS behavior according to the embodiment of the present disclosure or controlling the transceiver 206 to execute the BS behavior according to the embodiment of the present disclosure.

[0072] In this disclosure, a BS is also referred to as a Node B (NB), an eNode B (eNB), or a gNB.

[0073] Figure 3 An example of a UE to which an embodiment of the present disclosure is applied is shown.

[0074] refer to Figure 3 , UE 100 may correspond to Figure 2 A first wireless device 100 is provided.

[0075] UE 100 includes a processor 102 , a memory 104 , a transceiver 106 , one or more antennas 108 , a power management module 141 , a battery 142 , a display 143 , a keypad 144 , a subscriber identity module (SIM) card 145 , a speaker 146 , and a microphone 147 .

[0076] 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 DSP, a CPU, a GPU, a modem (modulator and demodulator). Examples of the processor 102 may be found at MANUFACTURED BY SNAPDRAGON TM Series processors, Manufactured by EXYNOS TM Series processors, A series processors manufactured by Made by HELIO TM Series processors, ATOM manufactured TM series processors or the corresponding next-generation processors.

[0077] The memory 104 is operably 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 technology described herein can 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 can be stored in the memory 104 and executed by the processor 102. The memory 104 can be implemented within the processor 102 or outside the processor 102, in which case the memory 104 can be communicatively coupled to the processor 102 via various means known in the art.

[0078] The transceiver 106 is operably 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.

[0079] The power management module 141 manages the power of the processor 102 and / or the transceiver 106. The battery 142 supplies power to the power management module 141.

[0080] The display 143 outputs the result processed by the processor 102. The keyboard 144 receives input to be used by the processor 102. The keyboard 144 may be shown on the display 143.

[0081] The SIM card 145 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.

[0082] The speaker 146 outputs sound related results processed by the processor 102. The microphone 147 receives sound related input to be used by the processor 102.

[0083] Figure 4 and Figure 5 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.

[0084] Specifically, Figure 4 An example of a radio interface user plane protocol stack between a UE and a BS is illustrated, and Figure 5An 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 4 , the user plane protocol stack can be divided into layer 1 (ie, PHY layer) and layer 2. Figure 5 , 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).

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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).

[0089] 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.

[0090] 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.

[0091] 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 the 5G core network (5GC) or the next generation radio access network (NG-RAN); establishment, maintenance and release of the RRC connection between the UE and the 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.

[0092] Figure 6 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0093] Figure 6The 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., 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 a cyclic prefix (CP)-OFDM symbol), an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0094] Reference Figure 6 , downlink and uplink transmissions are organized into frames. Each frame has T f =10 ms Each frame is divided into two half-frames, each half-frame has 5 ms Duration. Each half frame consists of 5 subframes, where the duration of each subframe is T sf is 1ms. 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 the 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.

[0095] Table 3 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 normal CP subframe,u slot .

[0096] [Table 3]

[0097] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe，u slot ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0098] Table 4 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 slotand the number of slots N per subframe for the extended CP subframe，u slot .

[0099] [Table 4]

[0100] u <![CDATA[ / slot symb ]]> <![CDATA[N frame，u slot ]]> <![CDATA[N subframe，u slot ]]> 2 12 40 4

[0101] 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.

[0102] 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 CRB 0 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 nCRB 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.

[0103] 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 UL CCs). 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 that carries 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.

[0104] 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 physical uplink control channel (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.

[0105] Figure 7 An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0106] Reference Figure 7 , "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.

[0107] In the PHY layer, the uplink transport channel UL-SCH and the random access channel (RACH) are mapped to their physical channels, the physical uplink shared channel (PUSCH) and the physical random access channel (PRACH), respectively, and the downlink transport channels DL-SCH, BCH and PCH are mapped to the physical downlink shared channel (PDSCH), the physical broadcast channel (PBCH) and the PDSCH, respectively. In the PHY layer, the uplink control information (UCI) is mapped to the physical PUCCH, and the downlink control information (DCI) is mapped to the physical downlink control channel (PDCCH). The MAC PDU related to the UL-SCH is sent by the UE via the PUSCH based on the UL grant, and the MAC PDU related to the DL-SCH is sent by the BS via the PDSCH based on the DL assignment.

[0108] Conditional PSCell addition (CPA) is described.

[0109] The Secondary Node (SN) Addition procedure is initiated by the Master Node (MN) and is used to establish a UE context at the SN to facilitate provision of resources from the SN to the UE. For bearers requiring SCG radio resources, the procedure is used to add at least the initial SCG serving cell of the SCG. The procedure can also be used to configure SN terminated MCG bearers (where SCG configuration is not required). In the case of CPA, the procedure can be used for CPA configuration and CPA execution.

[0110] Figure 8 An example of a CPA process to which an implementation of the present disclosure is applied is shown.

[0111] 1. MN decides to configure CPA for the UE. The MN requests the target candidate SN to allocate resources for one or more specific PDU sessions / QoS flows indicating QoS flow characteristics (QoS flow level QoS parameters, PDU session level transport network layer (TNL) address information, and PDU session level network slice information), and provides the candidate SN with an upper limit on the number of PSCells. In addition, for bearers that require SCG radio resources, the MN indicates the requested SCG configuration information (including the entire UE capabilities and UE capability coordination results). In this case, the MN also provides the MN recommended candidate cells via the latest measurement results so that the SN selects and configures the SCG cell. The MN can request the SN to allocate radio resources for split SRB operations. In NR-DC, the MN always provides all required security information to the SN (even if no SN terminated bearer is established) to enable SRB3 to be established based on the SN decision.

[0112] 2. If the radio resource management (RRM) entity in the SN is able to accommodate the resource request, it allocates the corresponding transport network resources and the corresponding radio resources according to the bearer type option, and provides the prepared PSCell ID to the MN. For bearers that require SCG radio resources, the SN triggers UE random access so that synchronization of the SN radio resource configuration can be performed. Within the list of cells indicated in the measurement results indicated by the MN, the SN decides the list of PSCells to be prepared, and for each prepared PSCell, the SN decides other SCG SCells, and provides the MN with the new corresponding SCG radio resource configuration in the NR RRC configuration message (RRCReconfiguration***) contained in the SN add request confirmation message. The target SN can accept or reject each of the candidate cells proposed by the MN, that is, it cannot generate any alternative candidates.

[0113] 3. The MN sends an RRC reconfiguration message (RRCReconfiguration*) to the UE, which includes the CPA configuration (i.e., a list of RRC reconfiguration** messages) and associated execution conditions, wherein the RRC reconfiguration** message contains the RRCReconfiguration*** and possible MCG configurations received from the candidate SN. In addition, the RRC reconfiguration message (RRCReconfiguration*) may also include the current MCG update configuration, for example, to configure the required conditional measurements.

[0114] 4. The UE applies the RRC configuration (in RRCReconfiguration*) excluding the CPA configuration, stores the CPA configuration and replies to the MN with an RRC Reconfiguration Complete message (RRCReconfigurationComplete*) without any NR SN RRC Response message. In case the UE cannot comply with (part of) the configuration included in the RRC Reconfiguration* message, it performs a Reconfiguration Failure procedure.

[0115] 4a.UE starts to evaluate the execution conditions. If the execution conditions of a candidate PSCell are met, the UE applies the RRC reconfiguration message (RRCReconfiguration**) corresponding to the selected candidate PSCell, and sends the MN RRC reconfiguration completion message (RRCReconfigurationComplete**) (including the NR RRC reconfiguration completion message (RRCReconfigurationComplete***) for the selected candidate PSCell) and the selected PSCell information to the MN.

[0116] 5. The MN notifies the SN via the SN reconfiguration complete message (including the RRCReconfigurationComplete*** message) that the UE has successfully completed the reconfiguration process. If configured, the MN sends an SN release request message to cancel the CPA in other target candidate SNs.

[0117] 6. The UE performs synchronization towards the selected PSCell indicated in the RRC Reconfiguration ** message. The order in which the UE sends the MNRRC Reconfiguration Complete ** message and performs the Random Access procedure towards the SCG is not defined. A successful completion of the RRC Connection Reconfiguration procedure does not require a successful RA procedure towards the SCG.

[0118] Conditional PSCell changes (CPCs) are described.

[0119] CPC is defined as a PSCell change executed by the UE when the execution conditions are met. The UE starts evaluating the execution conditions when receiving the CPC configuration and stops evaluating the execution conditions once the PSCell change is triggered. Intra-SN CPC without MN participation and inter-SN CPC initiated by MN or SN are supported.

[0120] The following principles apply to CPC.

[0121] -CPC configuration includes the configuration and execution conditions of CPC candidate PSCells, and may include MN configuration for inter-SN CPC.

[0122] - The execution conditions may include one or two trigger conditions (CPC events A3 / A5). Only a single reference signal (RS) type is supported, and up to two different trigger quantities (e.g., reference signal received power (RSRP) and reference signal received quality (RSRQ), RSRP and signal-to-noise plus interference ratio (SINR), etc.) may be configured simultaneously to evaluate the CPC execution conditions of a single candidate PSCell.

[0123] - Before any CPC execution conditions are met, upon receiving a PSCell Change Command or PCell Change Command, the UE performs the PSCell Change Procedure or PCell Change Procedure independently of any previously received CPC configuration. Upon successful completion of the PSCell Change Procedure or PCell Change Procedure, the UE releases all stored CPC configurations.

[0124] -While executing CPC, the UE does not need to continue evaluating the execution conditions of other candidate PSCells.

[0125] - Upon successful execution of the CPC procedure, the UE releases all stored CPC configurations.

[0126] -When releasing the SCG, the UE releases the stored CPC configuration.

[0127] CPC configuration in Handover (HO) command, PSCell Change command, or Conditional Reconfiguration is not supported.

[0128] Even if the UE is configured with CPA for more than one neighbor cell, once one of the neighbor cells is added as a PSCell, the CPA configuration for the other neighbor cells may no longer be useful. If the target cell is the same, the CPA configuration and CPC configuration are expected to be almost the same except for the execution conditions. However, for PSCell changes, the network may need to configure CPC separately for the same neighbor cell after the PSCell is added.

[0129] According to an implementation of the present disclosure, a UE may select an execution condition set between two execution condition sets configured for conditional mobility based on whether the UE is configured with a PSCell. The first execution condition set may be used to determine whether to perform a PSCell addition, and the second execution condition set may be used to determine whether to perform a PSCell change. When an execution condition belonging to the selected set is met, the UE may perform conditional mobility.

[0130] More specifically, in order to reuse the CPA configuration for CPC after PSCell addition, the execution conditions for CPA and CPC can be configured together in the conditional reconfiguration. For example, the execution conditions for CPA and CPC can be configured together in CondReconfigToAddMod. Then, this conditional reconfiguration can be used for CPA again after SN release.

[0131] Since CPC cannot be executed when SCG is not configured, if the execution conditions for CPA and CPC are configured together in conditional reconfiguration, the UE can evaluate only the CPA execution condition when SCG is not configured. In addition, if SCG has been configured, the UE can evaluate only the CPC execution condition.

[0132] The following figures are created to explain the specific embodiments of the present disclosure. The names of specific devices or the names of specific signals / messages / fields shown in the figures are provided by way of example, so the technical features of the present disclosure are not limited to the specific names used in the following figures.

[0133] Fig. 9 An example of a method performed by a wireless device to which an implementation of the present disclosure is applied is shown.

[0134] At step S900, the method includes receiving a conditional configuration for a target cell from a network. The conditional configuration includes configuration parameters for the target cell. The configuration parameters include i) configuration of the target cell, ii) a first execution condition for CPA, and iii) a second execution condition for CPC.

[0135] In step S910 , the method includes selecting an execution condition from a first execution condition and a second execution condition based on whether a PSCell is configured.

[0136] At step S920, the method includes evaluating an execution condition of the target cell.

[0137] At step S930 , the method includes applying the configuration of the target cell that satisfies the one execution condition.

[0138] In some implementations, a first execution condition may be selected for an execution condition based on a non-configured PSCell. In other words, when a PSCell is not configured, a first execution condition may be selected for an execution condition. For example, evaluating an execution condition of a target cell may include determining whether to perform CPA based on a first execution condition selected for an execution condition. For example, applying the configuration of the target cell may include performing CPA using a target cell that satisfies the first execution condition. For example, the first execution condition may be considered valid, and the second execution condition may be considered invalid. For example, only the first execution condition selected for an execution condition may be evaluated, and the second execution condition not selected for an execution condition may not be evaluated.

[0139] In some implementations, a second execution condition may be selected for an execution condition based on the configuration of the PSCell. In other words, when the PSCell is configured, a second execution condition may be selected for an execution condition. For example, evaluating an execution condition of a target cell may include determining whether to perform CPC based on a second execution condition selected for an execution condition. For example, applying the configuration of the target cell may include performing CPC using a target cell that satisfies the second execution condition. For example, the second execution condition may be considered valid and the first execution condition may be considered invalid. For example, only the second execution condition selected for an execution condition may be evaluated, and the first execution condition not selected for an execution condition may not be evaluated.

[0140] In some implementations, the first execution condition may include at least one of CondEvent A4 or CondEvent B1.

[0141] In some implementations, the second execution condition may include at least one of CondEvent A3 or CondEvent A5.

[0142] In some implementations, the first execution condition may belong to a first execution condition set.

[0143] In some implementations, the second execution condition may belong to a second execution condition set.

[0144] In some implementations, a wireless device may be connected to both a master node (MN) and a secondary node (SN) in dual connectivity (DC). A master cell group (MCG) including a primary cell (PCell) and optionally one or more SCells may be associated with a MN. A secondary cell group (SCG) including a PSCell and optionally one or more SCells may be associated with a SN.

[0145] In some implementations, the wireless device may communicate with at least one of a mobile device other than the wireless device, a network, and / or an autonomous vehicle.

[0146] In addition, the above Fig. 9 The method described in the angle of the wireless device can be obtained by Figure 2 The first wireless device 100 and / or Figure 3 The UE 100 shown is used for execution.

[0147] The wireless device includes at least one transceiver, at least one processor, and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions, the instructions being executed based on execution by the at least one processor Fig. 9 The method described in .

[0148] More specifically, the wireless device receives a conditional configuration for a target cell from a network. The conditional configuration includes configuration parameters for the target cell. The configuration parameters include i) configuration of the target cell, ii) a first execution condition for CPA, and iii) a second execution condition for CPC.

[0149] The wireless device selects an execution condition from among the first execution condition and the second execution condition based on whether the PSCell is configured.

[0150] The wireless device evaluates an execution condition of the target cell.

[0151] The wireless device applies the configuration of the target cell that satisfies the one execution condition.

[0152] In some implementations, a first execution condition may be selected for an execution condition based on a non-configured PSCell. In other words, when a PSCell is not configured, a first execution condition may be selected for an execution condition. For example, evaluating an execution condition of a target cell may include determining whether to perform CPA based on a first execution condition selected for an execution condition. For example, applying the configuration of the target cell may include performing CPA using a target cell that satisfies the first execution condition. For example, the first execution condition may be considered valid, and the second execution condition may be considered invalid. For example, only the first execution condition selected for an execution condition may be evaluated, and the second execution condition not selected for an execution condition may not be evaluated.

[0153] In some implementations, a second execution condition may be selected for an execution condition based on the configuration of the PSCell. In other words, when the PSCell is configured, a second execution condition may be selected for an execution condition. For example, evaluating an execution condition of a target cell may include determining whether to perform CPC based on a second execution condition selected for an execution condition. For example, applying the configuration of the target cell may include performing CPC using a target cell that satisfies the second execution condition. For example, the second execution condition may be considered valid and the first execution condition may be considered invalid. For example, only the second execution condition selected for an execution condition may be evaluated, and the first execution condition not selected for an execution condition may not be evaluated.

[0154] In some implementations, the first execution condition may include at least one of CondEvent A4 or CondEvent B1.

[0155] In some implementations, the second execution condition may include at least one of CondEvent A3 or CondEvent A5.

[0156] In some implementations, the first execution condition may belong to a first execution condition set.

[0157] In some implementations, the second execution condition may belong to a second execution condition set.

[0158] In some implementations, a wireless device may be connected to both a MN and a SN in a DC. An MCG including a PCell and optionally one or more SCells may be associated with a MN. An SCG including a PSCell and optionally one or more SCells may be associated with a SN.

[0159] In addition, the above Fig. 9 The method of describing the angle of the wireless device can be included in Figure 2 The processor 102 in the first wireless device 100 shown controls and / or controls the Figure 3 The processor 102 in the UE 100 shown controls the execution.

[0160] A processing device adapted to control a wireless device includes at least one processor and at least one memory operatively connectable to the at least one processor. The at least one processor is adapted to execute Fig. 9 The method described in .

[0161] In addition, the above Fig. 9 The method of describing the angle of the wireless device may be stored in a Figure 2 The first wireless device 100 is shown to be executed by software code 105 in the memory 104.

[0162] The technical features of the present disclosure may be implemented directly 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 RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, removable disk, CD-ROM, or any other storage medium.

[0163] Some examples of storage media can be connected to a processor so that the processor can read information from the storage medium. 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.

[0164] The computer-readable medium may include tangible and non-transitory computer-readable storage media.

[0165] For example, non-transitory computer-readable media may include RAM (e.g., synchronous DRAM (SDRAM)), ROM, non-volatile RAM (NVRAM), EEPROM, flash memory, magnetic or optical data storage media, or any other media that can be used to store instructions or data structures. Non-transitory computer-readable media may also include combinations of the above items.

[0166] 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 can be accessed, read, and / or executed by a computer.

[0167] According to some implementations of the present disclosure, a non-transitory computer readable medium (CRM) stores instructions that are executed by at least one processor. Fig. 9The method described in .

[0168] Fig.10 An example of a method executed by a base station to which an implementation of the present disclosure is applied is shown.

[0169] At step S1000 , the method includes requesting a target candidate SN to allocate resources.

[0170] At step S1010 , the method includes receiving a new corresponding SCG radio resource configuration from at least one of the target candidate SNs.

[0171] At step S1020, the method includes sending a conditional configuration for the target cell to the wireless device. The conditional configuration includes configuration parameters for the target cell. The configuration parameters include i) configuration of the target cell, ii) a first execution condition for CPA, and iii) a second execution condition for CPC.

[0172] Based on whether the PSCell is configured, an execution condition is selected from the first execution condition and the second execution condition, and the configuration of the target cell that meets the one execution condition is applied.

[0173] In some implementations, the first execution condition may be selected for one execution condition based on the PSCell not being configured. In other words, when the PSCell is not configured, the first execution condition may be selected for one execution condition.

[0174] In some implementations, a second execution condition may be selected for one execution condition based on the PSCell being configured. In other words, when the PSCell is configured, a second execution condition may be selected for one execution condition.

[0175] In some implementations, the first execution condition may include at least one of CondEvent A4 or CondEvent B1.

[0176] In some implementations, the second execution condition may include at least one of CondEvent A3 or CondEvent A5.

[0177] In some implementations, the base station may be a MN in a DC.

[0178] In addition, the above Fig.10 The method described in the base station angle can be obtained by Figure 2 The second wireless device 200 is shown to perform.

[0179] The base station includes at least one transceiver, at least one processor, and at least one memory, the at least one memory being operatively connectable to the at least one processor and storing instructions, the instructions being executed based on execution by the at least one processor Fig.10 The method described in .

[0180] More specifically, the base station requests the target candidate SN to allocate resources.

[0181] The base station receives a new corresponding SCG radio resource configuration from at least one of the target candidate SNs.

[0182] The base station sends a conditional configuration for the target cell to the wireless device. The conditional configuration includes configuration parameters for the target cell. The configuration parameters include i) configuration of the target cell, ii) a first execution condition for CPA, and iii) a second execution condition for CPC.

[0183] Based on whether the PSCell is configured, an execution condition is selected from the first execution condition and the second execution condition, and the configuration of the target cell that meets the one execution condition is applied.

[0184] In some implementations, the first execution condition may be selected for one execution condition based on the PSCell not being configured. In other words, when the PSCell is not configured, the first execution condition may be selected for one execution condition.

[0185] In some implementations, a second execution condition may be selected for one execution condition based on the PSCell being configured. In other words, when the PSCell is configured, a second execution condition may be selected for one execution condition.

[0186] In some implementations, the first execution condition may include at least one of CondEvent A4 or CondEvent B1.

[0187] In some implementations, the second execution condition may include at least one of CondEvent A3 or CondEvent A5.

[0188] In some implementations, the base station may be a MN in a DC.

[0189] Fig.11 An example of UE operation to which an implementation of the present disclosure is applied is shown.

[0190] In step S1100 , the UE receives conditional mobility configuration for a target cell from the network.

[0191] For example, the conditional mobility configuration may include at least one of the following items: a configuration parameter for a target cell, at least one first execution condition, and at least one second execution condition.

[0192] For example, the execution condition set may include one or more execution conditions. At least one first execution condition may belong to the first execution condition set. At least one second execution condition may belong to the second execution condition set.

[0193] For example, each execution condition configured in the conditional mobility configuration may belong to the first execution condition set or the second execution condition set.

[0194] For example, the execution conditions belonging to the first execution condition set may be used to evaluate the target cell indicated in the conditional mobility configuration for CPA. That is, the execution conditions belonging to the first execution condition set may be used to determine whether to use the target cell indicated in the conditional mobility configuration to perform CPA.

[0195] For example, the execution conditions belonging to the second execution condition set may be used to evaluate the target cell indicated in the conditional mobility configuration for CPC. That is, the execution conditions belonging to the second execution condition set may be used to determine whether to use the target cell indicated in the conditional mobility configuration to perform CPC.

[0196] For example, the execution condition belonging to the first execution condition set may be CondEvent A4 or CondEvent B1. The execution condition belonging to the second execution condition set may be CondEvent A3 or CondEvent A5.

[0197] For example, CondEvent A3 means that the conditional reconfiguration candidate becomes better than the PCell / PSCell by an offset. CondEvent A4 means that the conditional reconfiguration candidate becomes better than an absolute threshold. CondEvent A5 means that the PCell / PSCell becomes worse than an absolute threshold of 1, and the conditional reconfiguration candidate becomes better than another absolute threshold of 2.

[0198] For example, the network configures one or more candidate target special cells (SpCells) to the UE in conditional reconfiguration. The network provides configuration parameters for the target SpCell in the ConditionalReconfiguration IE.

[0199] If ConditionalReconfiguration contains condReconfigToAddModList, the UE performs conditional reconfiguration addition / modification.

[0200] For each condReconfigId received in the condReconfigToAddModList IE, the UE may:

[0201] 1> If an entry with a matching condReconfigId exists in condReconfigToAddModList within VarConditionalReconfig:

[0202] 2> If the entries in condReconfigToAddModList include condExecutionCond or condExecutionCondSCG;

[0203] 3>Replace condExecutionCond or condExecutionCondSCG in VarConditionalReconfig with the value received for that condReconfigId;

[0204] 2> If the entries in condReconfigToAddModList include condRRCReconfig;

[0205] 3>Replace condRRCReconfig in VarConditionalReconfig with the value received for this condReconfigId;

[0206] 1> Otherwise:

[0207] 2> Add a new entry for the condReconfigId in VarConditionalReconfig;

[0208] In step S1110 , the UE selects an execution condition set between a first execution condition set and a second execution condition set based on whether a PSCell is configured.

[0209] For example, if an execution condition set for CPA and another execution condition set for CPC are configured in the conditional mobility configuration, the UE may select the execution condition set based on whether the PSCell is configured. For example, if the UE is not configured with a PSCell, the UE may select the execution condition for CPA. For example, if the UE is configured with a PSCell, the UE may select the execution condition for CPC.

[0210] For example, the UE may consider the selected execution condition set as valid and the unselected execution condition set as invalid. For example, if the UE is not configured with a PSCell, the UE may consider the execution condition for CPA as valid and the execution condition for CPC as invalid. For example, if the UE is configured with a PSCell, the UE may consider the execution condition for CPC as valid and the execution condition for CPA as invalid.

[0211] Alternatively, if the execution condition for CPA and the execution condition for CPC are configured in the conditional mobility configuration, the UE may only regard the execution condition for CPA as valid. The UE may discard the execution condition for CPA and maintain other configurations except the execution condition for CPA after adding the PSCell.

[0212] Alternatively, for conditional mobility, if an execution condition for CPA and an execution condition for CPC are configured, when the UE is not configured with a PSCell, the UE may consider that the conditional mobility is for CPA.

[0213] Alternatively, for conditional mobility, if an execution condition for CPA and an execution condition for CPC are configured, when the UE is configured with a PSCell, the UE may consider that the conditional mobility is for CPC.

[0214] At step S1120, the UE determines whether to use the selected execution condition set to perform conditional mobility. That is, the UE uses the selected execution condition set to evaluate the target cell.

[0215] For example, if an execution condition for CPA is selected, the UE may use the execution condition for CPA to determine whether to execute CPA.For example, if an execution condition for CPC is selected, the UE may use the execution condition for CPC to determine whether to execute CPC.

[0216] For example, the UE may evaluate the selected set of execution conditions and may not evaluate the unselected execution conditions. For example, if an execution condition for CPA is selected, the UE may evaluate the execution condition for CPA and may not evaluate the execution condition for CPC. For example, if an execution condition for CPC is selected, the UE may evaluate the execution condition for CPC and may not evaluate the execution condition for CPA.

[0217] For example, the UE may only evaluate the valid execution conditions to decide whether to perform conditional mobility.

[0218] For example, the UE may evaluate the conditions of each configured candidate target SpCell. The UE may:

[0219] 1>For each condReconfigId in VarConditionalReconfig:

[0220] 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;

[0221] 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;

[0222] 2> If condExecutionCondSCG is configured:

[0223] 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;

[0224] 2>If condExecutionCond is configured:

[0225] 3> If it is configured via SRB3 or configured via SRB1 in nr-SCG or in nr-SecondaryCellGroupConfig:

[0226] 4> In the rest of the process, each measId indicated in condExecutionCond is treated as a measId in the VarMeasConfig associated with SCGmeasConfig;

[0227] 3>Otherwise:

[0228] 4> In the rest of the process, each measId indicated in condExecutionCond is treated as a measId in the VarMeasConfig associated with MCGmeasConfig;

[0229] 2> For each measId included in the measIdList within the VarMeasConfig indicated in the condExecutionCond or condExecutionCondSCG associated with condReconfigId:

[0230] 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

[0231] 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

[0232] 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:

[0233] 4> It is considered that the event associated with the measId is satisfied;

[0234] 3> If the measId for the event associated with condReconfigId has been modified; or

[0235] 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

[0236] 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

[0237] 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:

[0238] 4> The event associated with the measId is considered not to be satisfied;

[0239] 2> If the events associated with all measIds in the condTriggerConfig for the target candidate cell in the stored condRRCReconfig are met:

[0240] 3> The target candidate cell associated with the condReconfigId in the stored condRRCReconfig is regarded as the triggering cell;

[0241] In step S1130 , the UE performs conditional mobility to the target cell.

[0242] For example, if the selected execution condition set is satisfied, the UE may perform conditional mobility corresponding to the selected execution condition set.

[0243] For example, if the execution condition for CPA is selected and satisfied, the UE may perform CPA.For example, if the execution condition for CPC is selected and satisfied, the UE may perform CPC.

[0244] For example, the UE may apply a conditional reconfiguration associated with one of the target SpCells that satisfies the associated execution condition. The UE may:

[0245] 1> If there is more than one triggering cell:

[0246] 2> Select one of the triggering cells as the selected cell for conditional reconfiguration execution;

[0247] 1> Otherwise:

[0248] 2> Treat the triggering cell as the selected cell for conditional reconfiguration execution;

[0249] 1> For the selected cell executed for conditional reconfiguration:

[0250] 2> Apply the stored condRRCReconfig of the selected cell;

[0251] Fig.12 An example of a process of applying an implementation of the present disclosure is shown.

[0252] exist Fig.12 In the example, the UE is not currently configured with a PSCell and receives two conditional mobility configurations from a serving cell.

[0253] At step S1200 , the UE receives a first conditional mobility configuration for cell 1. The first conditional mobility configuration includes an execution condition for CPA and an execution condition for CPC, and the mobility target cell is cell 1.

[0254] At step S1202, the UE receives a second conditional mobility configuration for cell 2. The second conditional mobility configuration includes an execution condition for CPA and an execution condition for CPC, and the mobility target cell is cell 2.

[0255] In step S1210, since the UE is not configured with a PSCell, the UE considers that only the execution condition for CPA is valid among the two conditional mobility configurations.

[0256] At steps S1220 and S1222 , the UE determines whether execution conditions for CPA are satisfied for the mobility target cells (ie, cell 1 and cell 2 ).

[0257] In step S1230, the execution condition for CPA indicated in the first conditional mobility configuration is met. The UE adds cell 1 as a PSCell.

[0258] At step S1240, since the UE is configured with a PSCell, the UE considers that only the execution condition for CPC is valid in the second conditional mobility configuration. The UE determines whether the execution condition for CPC is satisfied for the mobility target cell (ie, cell 2).

[0259] The present disclosure may have various beneficial effects.

[0260] For example, the UE may use CPA configuration for CPC after PSCell addition, thereby reducing the network signaling required for CPC configuration.

[0261] The beneficial effects obtained by the specific examples of this specification are not limited to the effects listed above. For example, there may be a variety of technical effects that can be understood or derived from this specification by a person of ordinary skill in the art. 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.

[0262] The claims in this disclosure can be combined in various ways. For example, the technical features in the method claims of this disclosure can be combined to be implemented or performed in a device, and the technical features in the device claims can be combined to be implemented or performed in a method. In addition, the technical features in the method claims and the device claims can be combined to be implemented or performed in a device. In addition, the technical features in the method claims and the device claims can 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 adapted to operate in a wireless communication system, the method comprising the steps of: Receive conditional configuration for the target cell from the network, The conditional configuration includes configuration parameters for the target cell, and The configuration parameters include i) the configuration of the target cell, ii) a first execution condition for adding a CPA to a conditional primary and secondary cell PSCell, and iii) a second execution condition for changing the CPC to the conditional PSCell; selecting an execution condition from the first execution condition and the second execution condition based on whether the PSCell is configured; evaluating the one execution condition of the target cell; and The configuration of the target cell that satisfies the one execution condition is applied.

2. The method according to claim 1, wherein: Based on the PSCell not being configured, the first execution condition is selected for the one execution condition.

3. The method according to claim 2, wherein: The step of evaluating the one execution condition of the target cell includes determining whether to perform the CPA based on selecting the first execution condition for the one execution condition.

4. The method according to claim 2, wherein: The step of applying the configuration of the target cell comprises performing the CPA using the target cell satisfying the first execution condition.

5. The method according to claim 2, wherein: The first execution condition is considered valid and the second execution condition is considered invalid.

6. The method according to claim 2, wherein: Only the first execution condition selected for the one execution condition is evaluated, and the second execution condition not selected for the one execution condition is not evaluated.

7. The method according to any one of claims 1 to 6, wherein: Based on configuring the PSCell, the second execution condition is selected for the one execution condition.

8. The method according to claim 7, wherein: The step of evaluating the one execution condition of the target cell includes determining whether to perform the CPC based on selecting the second execution condition for the one execution condition.

9. The method according to claim 7, wherein: The step of applying the configuration of the target cell comprises performing the CPC using the target cell satisfying the second execution condition.

10. The method according to claim 7, wherein: The second execution condition is considered to be valid and the first execution condition is considered to be invalid.

11. The method according to claim 7, wherein: Only the second execution condition selected for the one execution condition is evaluated, and the first execution condition not selected for the one execution condition is not evaluated.

12. The method according to any one of claims 1 to 11, wherein: The first execution condition includes at least one of CondEventA4 or CondEvent B1.

13. The method according to any one of claims 1 to 12, wherein: The second execution condition includes at least one of CondEventA3 or CondEvent A5.

14. The method according to any one of claims 1 to 13, wherein: The first execution condition belongs to a first execution condition set.

15. The method according to any one of claims 1 to 14, wherein: The second execution condition belongs to a second execution condition set.

16. The method according to any one of claims 1 to 15, wherein: The wireless device is connected to both the master node MN and the secondary node SN in dual connectivity DC.

17. The method according to claim 16, wherein: A primary cell group MCG including a primary cell PCell and optionally one or more SCells is associated with the MN.

18. The method according to claim 16, wherein: A secondary cell group SCG including the PSCell and optionally one or more SCells is associated with the SN.

19. The method according to any one of claims 1 to 18, wherein: The wireless device communicates with at least one of a mobile device other than the wireless device, a network, and / or an autonomous vehicle.

20. A wireless device adapted to operate in a wireless communication system, the wireless device comprising: at least one transceiver; at least one processor; as well as At least one memory, the at least one memory being operatively connectable to the at least one processor and storing instructions, the instructions being executed by the at least one processor to perform the method according to any one of claims 1 to 19.

21. A processing device adapted to control a wireless device in a wireless communication system, the processing device comprising: at least one processor; as well as at least one memory operatively connectable to the at least one processor, Wherein, the at least one processor is adapted to perform the method according to any one of claims 1 to 19.

22. A non-transitory computer readable medium (CRM) storing instructions for executing, upon being executed by at least one processor, the method according to any one of claims 1 to 19.

23. A method performed by a base station adapted to operate in a wireless communication system, the method comprising the steps of: Requesting the target candidate secondary node SN to allocate resources; receiving a new corresponding secondary cell group SCG radio resource configuration from at least one of the target candidate SNs; sending a conditional configuration for a target cell to a wireless device, The conditional configuration includes configuration parameters for the target cell. The configuration parameters include i) the configuration of the target cell, ii) a first execution condition for adding a CPA to a conditional primary and secondary cell PSCell, and iii) a second execution condition for changing the CPC to the conditional PSCell; wherein an execution condition is selected from the first execution condition and the second execution condition based on whether the PSCell is configured, and Therein, the configuration of the target cell that satisfies the one execution condition is applied.

24. The method according to claim 23, wherein: Based on the PSCell not being configured, the first execution condition is selected for the one execution condition.

25. The method according to claim 23 or 24, wherein: Based on configuring the PSCell, the second execution condition is selected for the one execution condition.

26. The method according to any one of claims 23 to 25, wherein: The first execution condition includes at least one of CondEvent A4 or CondEvent B1.

27. The method according to any one of claims 22 to 26, wherein: The second execution condition includes at least one of CondEvent A3 or CondEvent A5.

28. The method according to any one of claims 22 to 27, wherein: The base station is a master node MN in the dual-connection DC.

29. A base station adapted to operate in a wireless communication system, the base station comprising: at least one transceiver; at least one processor; as well as At least one memory, the at least one memory being operatively connectable to the at least one processor and storing instructions, the instructions performing the method according to any one of claims 23 to 28 upon being executed by the at least one processor.

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