RRC state independent measurement

Abstract

A method and apparatus for reporting stored measurement results is provided. a wireless device receives a measurement configuration from a network. The wireless device receives a release message from the network, wherein the release message includes information informing that the measurement configuration is maintained. The wireless device performs a cell reselection based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

Description

RRC STATE INDEPENDENT MEASUREMENT

[0001] The present disclosure relates to RRC state independent measurement.

[0002] 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communications. Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity. The 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.

[0003] Work has started in international telecommunication union (ITU) and 3GPP to develop requirements and specifications for new radio (NR) systems. 3GPP has to identify and develop the technology components needed for successfully standardizing the new RAT timely satisfying both the urgent market needs, and the more long-term requirements set forth by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process. Further, the NR should be able to use any spectrum band ranging at least up to 100 GHz that may be made available for wireless communications even in a more distant future.

[0004] The NR targets a single technical framework addressing all usage scenarios, requirements and deployment scenarios including enhanced mobile broadband (eMBB), massive machine-type-communications (mMTC), ultra-reliable and low latency communications (URLLC), etc. The NR shall be inherently forward compatible.

[0005] In an aspect, a method performed by a wireless device adapted to operate is provided. The method comprises receiving a measurement configuration from a network. The method comprises receiving a release message from the network, wherein the release message includes information informing that the measurement configuration is maintained. The method comprises performing a cell reselection based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

[0006] FIG. 1 shows an example of a communication system to which implementations of the present disclosure are applied.

[0007] FIG. 2 shows an example of wireless devices to which implementations of the present disclosure are applied.

[0008] FIG. 3 shows an example of UE to which implementations of the present disclosure are applied.

[0009] FIGS. 4 and 5 show an example of protocol stacks in a 3GPP based wireless communication system to which implementations of the present disclosure are applied.

[0010] FIG. 6 shows a frame structure in a 3GPP based wireless communication system to which implementations of the present disclosure are applied.

[0011] FIG. 7 shows a data flow example in the 3GPP NR system to which implementations of the present disclosure are applied.

[0012] FIG. 8 shows an example of a method performed by a wireless device to which implementations of the present disclosure are applied.

[0013] FIG. 9 shows an example of a method performed by a base station to which implementations of the present disclosure are applied.

[0014] FIG. 10 shows an example of utilizing a measurement configuration to perform cell (re)selection to which implementations of the present disclosure are applied.

[0015] The following techniques, apparatuses, and systems may be applied to a variety of wireless multiple access systems. Examples of the multiple access systems include a Code Division Multiple Access (CDMA) system, a Frequency Division Multiple Access (FDMA) system, a Time Division Multiple Access (TDMA) system, an Orthogonal Frequency Division Multiple Access (OFDMA) system, a Single Carrier Frequency Division Multiple Access (SC-FDMA) system, and a Multi Carrier Frequency Division Multiple Access (MC-FDMA) system. CDMA may be embodied through radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be embodied through radio technology such as Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data rates for GSM Evolution (EDGE). OFDMA may be embodied through radio technology 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 a part of a 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 employs OFDMA in Downlink (DL) and SC-FDMA in Uplink (UL). Evolution of 3GPP LTE includes LTE-Advanced (LTE-A), LTE-A Pro, and / or 5G New Radio (NR).

[0016] For convenience of description, implementations of the present disclosure are mainly described in regards 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 3GPP based wireless communication system are applicable to other mobile communication systems.

[0017] For terms and technologies which are not specifically described among the terms of and technologies employed in the present disclosure, the wireless communication standard documents published before the present disclosure may be referenced.

[0018] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, "A or B" in the present disclosure may be interpreted as "A and / or B". For example, "A, B or C" in the present disclosure may mean "only A", "only B", "only C", or "any combination of A, B and C".

[0019] In the present disclosure, slash ( / ) or comma (,) may mean "and / or". For example, "A / B" may mean "A and / or B". Accordingly, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B or C".

[0020] 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 same as "at least one of A and B".

[0021] 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".

[0022] Also, parentheses 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, "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when shown as "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0023] Technical features that are separately described in one drawing in the present disclosure may be implemented separately or simultaneously.

[0024] Although not limited thereto, various descriptions, functions, procedures, suggestions, methods and / or operational flowcharts of the present disclosure disclosed herein can be applied to various fields requiring wireless communication and / or connection (e.g., 5G) between devices.

[0025] Hereinafter, the present disclosure will be described in more detail with reference to drawings. 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 unless otherwise indicated.

[0026] FIG. 1 shows an example of a communication system to which implementations of the present disclosure is applied.

[0027] The 5G usage scenarios shown in FIG. 1 are only exemplary, and the technical features of the present disclosure can be applied to other 5G usage scenarios which are not shown in FIG. 1.

[0028] Three main requirement categories for 5G include (1) a category of enhanced mobile broadband (eMBB), (2) a category of massive machine type communication (mMTC), and (3) a category of ultra-reliable and low latency communications (URLLC).

[0029] Referring to FIG. 1, the communication system 1 includes wireless devices 100a to 100f, base stations (BSs) 200, and a network 300. Although FIG. 1 illustrates a 5G network as an example of the network of the communication system 1, the implementations of the present disclosure are not limited to the 5G system, and can be applied to the future communication system beyond the 5G system.

[0030] The BSs 200 and the network 300 may be implemented as wireless devices and a specific wireless device may operate as a BS / network node with respect to other wireless devices.

[0031] The wireless devices 100a to 100f represent devices performing communication using radio access technology (RAT) (e.g., 5G new RAT (NR)) or LTE) and may be referred to as communication / radio / 5G devices. The wireless devices 100a to 100f may include, without being limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a hand-held device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, the vehicles may include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. The vehicles may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an AR / VR / Mixed Reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. The hand-held device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or a smartglasses), and a computer (e.g., a notebook). The home appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include a sensor and a smartmeter.

[0032] In the present disclosure, the wireless devices 100a to 100f may be called user equipments (UEs). A UE may include, for example, a cellular phone, a smartphone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle having an autonomous traveling function, a connected car, an 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 / environment device, a device related to a 5G service, or a device related to a fourth industrial revolution field.

[0033] The wireless devices 100a to 100f may be connected to the network 300 via the BSs 200. An 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 beyond-5G network. Although the wireless devices 100a to 100f may communicate with each other through the BSs 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BSs 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). The IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0034] Wireless communication / connections 150a, 150b and 150c may be established between the wireless devices 100a to 100f and / or between wireless device 100a to 100f and BS 200 and / or between BSs 200. Herein, the wireless communication / connections 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. The wireless devices 100a to 100f and the BSs 200 / the wireless devices 100a to 100f may transmit / receive radio signals to / from each other through the wireless communication / connections 150a, 150b and 150c. For example, the wireless communication / connections 150a, 150b and 150c may transmit / receive signals through various physical channels. To this end, at least a part of various configuration information configuring processes, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, and resource mapping / de-mapping), and resource allocating processes, for transmitting / receiving radio signals, may be performed based on the various proposals of the present disclosure.

[0035] NR supports multiples numerologies (and / or multiple Sub-Carrier Spacings (SCS)) to support various 5G services. For example, if SCS is 15 kHz, wide area can be supported in traditional cellular bands, and if SCS is 30 kHz / 60 kHz, dense-urban, lower latency, and wider carrier bandwidth can be supported. If SCS is 60 kHz or higher, bandwidths greater than 24.25 GHz can be supported to overcome phase noise.

[0036] The NR frequency band may be defined as two types of frequency range, i.e., Frequency Range 1 (FR1) and Frequency Range 2 (FR2). The numerical value of the frequency range may be changed. For example, the frequency ranges of the two types (FR1 and FR2) may be as shown in Table 1 below. For ease of explanation, in the frequency ranges used in the NR system, FR1 may mean “sub 6 GHz range”, FR2 may mean “above 6 GHz range,”and may be referred to as millimeter Wave (mmW).

[0037] Frequency Range designationCorresponding frequency rangeSubcarrier SpacingFR1450MHz - 6000MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0038] As mentioned above, the numerical value of the frequency range of the NR system may be changed. For example, FR1 may include a frequency band of 410MHz to 7125MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed band. Unlicensed bands may be used for a variety of purposes, for example for communication for vehicles (e.g., autonomous driving).

[0039] Frequency Range designationCorresponding frequency rangeSubcarrier SpacingFR1410MHz - 7125MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0040] Here, the radio communication technologies implemented in the wireless devices in the present disclosure may include narrowband internet-of-things (NB-IoT) technology for low-power communication as well as LTE, NR and 6G. For example, NB-IoT technology may be an example of low power wide area network (LPWAN) technology, may be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the above-mentioned names. Additionally and / or alternatively, the radio communication technologies implemented in the wireless devices in the present disclosure may communicate based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and be called by various names such as enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented in at least one of the 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-mentioned names. Additionally and / or alternatively, the radio communication technologies implemented in the wireless devices in the present disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN which take into account low-power communication, and may not be limited to the above-mentioned names. For example, ZigBee technology may generate personal area networks (PANs) associated with small / low-power digital communication based on various specifications such as IEEE 802.15.4 and may be called various names.

[0041] FIG. 2 shows an example of wireless devices to which implementations of the present disclosure are applied.

[0042] In FIG. 2, The first wireless device 100 and / or the second wireless device 200 may be implemented in various forms according to use cases / services. For example, {the first wireless device 100 and the second wireless device 200} may correspond to at least one of {the wireless device 100a to 100f and the BS 200}, {the wireless device 100a to 100f and the wireless device 100a to 100f} and / or {the BS 200 and the BS 200} of FIG. 1. The first wireless device 100 and / or the second wireless device 200 may be configured by various elements, devices / parts, and / or modules.

[0043] The first wireless device 100 may include at least one transceiver, such as a transceiver 106, at least one processing chip, such as a processing chip 101, and / or one or more antennas 108.

[0044] The processing chip 101 may include at least one processor, such a processor 102, and at least one memory, such as a memory 104. Additional and / or alternatively, the memory 104 may be placed outside of the processing chip 101.

[0045] The processor 102 may control the memory 104 and / or the transceiver 106 and may be adapted to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts described in the present disclosure. For example, the processor 102 may process information within the memory 104 to generate first information / signals and then transmit radio signals including the first information / signals through the transceiver 106. The processor 102 may receive radio signals including second information / signals through the transceiver 106 and then store information obtained by processing the second information / signals in the memory 104.

[0046] The memory 104 may be operably connectable to the processor 102. The memory 104 may store various types of information and / or instructions. The memory 104 may store a firmware and / or a software code 105 which implements codes, commands, and / or a set of commands that, when executed by the processor 102, perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. For example, the firmware and / or the software code 105 may implement instructions that, when executed by the processor 102, perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. For example, the firmware and / or the software code 105 may control the processor 102 to perform one or more protocols. For example, the firmware and / or the software code 105 may control the processor 102 to perform one or more layers of the radio interface protocol.

[0047] Herein, the processor 102 and the memory 104 may be a part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each of the transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be interchangeably used with Radio Frequency (RF) unit(s). In the present disclosure, the first wireless device 100 may represent a communication modem / circuit / chip.

[0048] The second wireless device 200 may include at least one transceiver, such as a transceiver 206, at least one processing chip, such as a processing chip 201, and / or one or more antennas 208.

[0049] The processing chip 201 may include at least one processor, such a processor 202, and at least one memory, such as a memory 204. Additional and / or alternatively, the memory 204 may be placed outside of the processing chip 201.

[0050] The processor 202 may control the memory 204 and / or the transceiver 206 and may be adapted to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts described in the present disclosure. For example, the processor 202 may process information within the memory 204 to generate third information / signals and then transmit radio signals including the third information / signals through the transceiver 206. The processor 202 may receive radio signals including fourth information / signals through the transceiver 106 and then store information obtained by processing the fourth information / signals in the memory 204.

[0051] The memory 204 may be operably connectable to the processor 202. The memory 204 may store various types of information and / or instructions. The memory 204 may store a firmware and / or a software code 205 which implements codes, commands, and / or a set of commands that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. For example, the firmware and / or the software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. For example, the firmware and / or the software code 205 may control the processor 202 to perform one or more protocols. For example, the firmware and / or the software code 205 may control the processor 202 to perform one or more layers of the radio interface protocol.

[0052] Herein, the processor 202 and the memory 204 may be a part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each of the transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be interchangeably used with RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0053] Hereinafter, hardware elements of the wireless devices 100 and 200 will be described more specifically. One or more protocol layers may be implemented by, without being limited to, one or more processors 102 and 202. For example, the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as Physical (PHY) layer, Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, and Service Data Adaptation Protocol (SDAP) layer). The one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs), one or more Service Data Unit (SDUs), messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. The one or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure and provide the generated signals to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive the signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and acquire the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure.

[0054] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The 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 the one or more processors 102 and 202. For example, the one or more processors 102 and 202 may be configured by a set of a communication control processor, an Application Processor (AP), an Electronic Control Unit (ECU), a Central Processing Unit (CPU), a Graphic Processing Unit (GPU), and a memory control processor.

[0055] The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. 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, non-volatile memory, hard drive, register, cash memory, computer-readable storage medium, and / or combinations thereof. The one or more memories 104 and 204 may be located at the interior and / or exterior of 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 connection.

[0056] The one or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels, mentioned in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure, to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels, mentioned in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure, from one or more other devices. For example, the one or more transceivers 106 and 206 may be connected to the one or more processors 102 and 202 and transmit and receive radio signals. For example, the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. The one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.

[0057] The one or more transceivers 106 and 206 may be connected to the one or more antennas 108 and 208. Additionally and / or alternatively, the one or more transceivers 106 and 206 may include one or more antennas 108 and 208. The 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, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure, through the one or more antennas 108 and 208. In the present disclosure, the one or more antennas 108 and 208 may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).

[0058] The one or more transceivers 106 and 206 may convert received user data, control information, radio signals / channels, etc., from RF band signals into baseband signals in order to process 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 the base band signals into the 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 can up-convert OFDM baseband signals to OFDM signals by 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 OFDM signals at a carrier frequency and down-convert the OFDM signals into OFDM baseband signals by their (analog) oscillators and / or filters under the control of the one or more processors 102 and 202.

[0059] Although not shown in FIG. 2, the wireless devices 100 and 200 may further include additional components. The additional components 140 may be variously configured according to types 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., audio I / O port, video I / O port), a driving 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 a wired or wireless connection.

[0060] In the implementations of the present disclosure, a UE may operate as a transmitting device in UL and as a receiving device in DL. In the implementations of the present disclosure, a BS may operate as a receiving device in UL and as a transmitting device in DL. Hereinafter, for convenience of description, it is mainly assumed that the first wireless device 100 acts as the UE, and the second wireless device 200 acts as the BS. For example, the processor(s) 102 connected to, mounted on or launched in the first wireless device 100 may be adapted to perform the UE behavior according to an implementation of the present disclosure or control the transceiver(s) 106 to perform the UE behavior according to an implementation of the present disclosure. The processor(s) 202 connected to, mounted on or launched in the second wireless device 200 may be adapted to perform the BS behavior according to an implementation of the present disclosure or control the transceiver(s) 206 to perform the BS behavior according to an implementation of the present disclosure.

[0061] In the present disclosure, a BS is also referred to as a node B (NB), an eNode B (eNB), or a gNB.

[0062] FIG. 3 shows an example of a UE to which implementations of the present disclosure are applied.

[0063] Referring to FIG. 3, a UE 100 may correspond to the first wireless device 100 of FIG. 2.

[0064] A 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 Identification Module (SIM) card 145, a speaker 146, and a microphone 147.

[0065] The processor 102 may be adapted to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. The processor 102 may be adapted to control one or more other components of the UE 100 to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in the present disclosure. Layers of the radio interface protocol may be implemented in the processor 102. The processor 102 may include ASIC, other chipset, logic circuit and / or data processing device. The processor 102 may be an application processor. The processor 102 may include at least one of DSP, CPU, GPU, a modem (modulator and demodulator). An example of the processor 102 may be found in SNAPDRAGONTMseries of processors made by QUALCOMM®, EXYNOSTMseries of processors made by SAMSUNG®, A series of processors made by APPLE®, HELIOTMseries of processors made by MEDIATEK®, ATOMTMseries of processors made by INTEL® or a corresponding next generation processor.

[0066] The memory 104 is operatively coupled with 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 device. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, etc.) that perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts 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 external to the processor 102 in which case those can be communicatively coupled to the processor 102 via various means as is known in the art.

[0067] The transceiver 106 is operatively coupled with the processor 102, and transmits and / or receives a radio signal. The transceiver 106 includes a transmitter and a receiver. The transceiver 106 may include baseband circuitry to process radio frequency signals. The transceiver 106 controls the one or more antennas 108 to transmit and / or receive a radio signal.

[0068] The power management module 141 manages power for the processor 102 and / or the transceiver 106. The battery 142 supplies power to the power management module 141.

[0069] The display 143 outputs results processed by the processor 102. The keypad 144 receives inputs to be used by the processor 102. The keypad 144 may be shown on the display 143.

[0070] The SIM card 145 is an　integrated circuit　that is intended to　securely store the　International Mobile Subscriber Identity　(IMSI) number and its related　key, which are used to identify and authenticate subscribers on　mobile telephony　devices (such as　mobile phones　and　computers). It is also possible to store contact information on many SIM cards.

[0071] The speaker 146 outputs sound-related results processed by the processor 102. The microphone 147 receives sound-related inputs to be used by the processor 102.

[0072] FIGS. 4 and 5 show an example of protocol stacks in a 3GPP based wireless communication system to which implementations of the present disclosure are applied.

[0073] In particular, FIG. 4 illustrates an example of a radio interface user plane protocol stack between a UE and a BS and FIG. 5 illustrates an example of a radio interface control plane protocol stack between a UE and a BS. The control plane refers to a path through which control messages used to manage call by a UE and a network are transported. The user plane refers to a path through which data generated in an application layer, for example, voice data or Internet packet data are transported. Referring to FIG. 4, the user plane protocol stack may be divided into Layer 1 (i.e., a PHY layer) and Layer 2. Referring to FIG. 5, the control plane protocol stack may be divided into Layer 1 (i.e., a PHY layer), Layer 2, Layer 3 (e.g., an RRC layer), and a Non-Access Stratum (NAS) layer. Layer 1, Layer 2 and Layer 3 are referred to as an Access Stratum (AS).

[0074] In the 3GPP LTE system, the Layer 2 is split into the following sublayers: MAC, RLC, and PDCP. In the 3GPP NR system, the Layer 2 is split into the following sublayers: MAC, RLC, PDCP and SDAP. The PHY layer offers to the MAC sublayer transport channels, the MAC sublayer offers to the RLC sublayer logical channels, the RLC sublayer offers to the PDCP sublayer RLC channels, the PDCP sublayer offers to the SDAP sublayer radio bearers. The SDAP sublayer offers to 5G core network Quality of Service (QoS) flows.

[0075] In the 3GPP NR system, the main services and functions of the MAC sublayer include: mapping between logical channels and transport channels; multiplexing / de-multiplexing of MAC SDUs belonging to one or different logical channels into / from Transport Blocks (TB) delivered to / from the physical layer on transport channels; scheduling information reporting; error correction through Hybrid Automatic Repeat reQuest (HARQ) (one HARQ entity per cell in case of Carrier Aggregation (CA)); priority handling between UEs by means of dynamic scheduling; priority handling between logical channels of one UE by means of logical channel prioritization; padding. A single MAC entity may support multiple numerologies, transmission timings and cells. Mapping restrictions in logical channel prioritization control which numerology(ies), cell(s), and transmission timing(s) a logical channel can use.

[0076] Different kinds of data transfer services are offered by MAC. To accommodate different kinds of data transfer services, multiple types of logical channels are defined, i.e., each supporting transfer of a particular type of information. Each logical channel type is defined by what type of information is transferred. Logical channels are classified into two groups: control channels and traffic channels. Control channels are used for the transfer of control plane information only, and traffic channels are used for the transfer of user plane information only. Broadcast Control Channel (BCCH) is a downlink logical channel for broadcasting system control information, Paging Control Channel (PCCH) is a downlink logical channel that transfers paging information, system information change notifications and indications of ongoing Public Warning Service (PWS) broadcasts, Common Control Channel (CCCH) is a logical channel for transmitting control information between UEs and network and used for UEs having no RRC connection with the network, and Dedicated Control Channel (DCCH) is a point-to-point bi-directional logical channel that transmits dedicated control information between a UE and the network and used by UEs having an RRC connection. Dedicated Traffic Channel (DTCH) is a point-to-point logical channel, dedicated to one UE, for the transfer of user information. A DTCH can exist in both uplink and downlink. In downlink, the following connections between logical channels and transport channels exist: BCCH can be mapped to Broadcast Channel (BCH); BCCH can be mapped to Downlink Shared Channel (DL-SCH); PCCH can be mapped to 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 uplink, the following connections between logical channels and transport channels exist: CCCH can be mapped to Uplink Shared Channel (UL-SCH); DCCH can be mapped to UL-SCH; and DTCH can be mapped to UL-SCH.

[0077] The RLC sublayer supports three transmission modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). The RLC configuration is per logical channel with no dependency on numerologies and / or transmission durations. In the 3GPP NR system, the main services and functions of the RLC sublayer depend on the transmission mode and include: transfer of upper layer PDUs; sequence numbering independent of the one 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 SDU (AM and UM); duplicate detection (AM only); RLC SDU discard (AM and UM); RLC re-establishment; protocol error detection (AM only).

[0078] 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); transfer of user data; reordering and duplicate detection; in-order delivery; PDCP PDU routing (in case of split bearers); retransmission of PDCP SDUs; ciphering, deciphering and integrity protection; PDCP SDU discard; PDCP re-establishment and data recovery for RLC AM; PDCP status reporting for RLC AM; duplication of PDCP PDUs 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; transfer of control plane data; reordering and duplicate detection; in-order delivery; duplication of PDCP PDUs and duplicate discard indication to lower layers.

[0079] In the 3GPP NR system, the main services and functions of SDAP include: mapping between a QoS flow and a data radio bearer; marking QoS Flow ID (QFI) in both DL and UL packets. A single protocol entity of SDAP is configured for each individual PDU session.

[0080] 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 5G Core network (5GC) or Next-Generation Radio Access Network (NG-RAN); establishment, maintenance and release of an RRC connection between the UE and NG-RAN; security functions including key management; establishment, configuration, maintenance and release of Signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs); mobility functions (including: handover and context transfer, UE cell selection and reselection and control of cell selection and reselection, inter-RAT mobility); QoS management functions; UE measurement reporting and control of the reporting; detection of and recovery from radio link failure; NAS message transfer to / from NAS from / to UE.

[0081] FIG. 6 shows a frame structure in a 3GPP based wireless communication system to which implementations of the present disclosure are applied.

[0082] The frame structure shown in FIG. 6 is purely exemplary and the number of subframes, the number of slots, and / or the number of symbols in a frame may be variously changed. In the 3GPP based wireless communication system, OFDM numerologies (e.g., SCS, Transmission Time Interval (TTI) duration) may be differently configured between a plurality of cells aggregated for one UE. For example, if a UE is configured with different SCSs for cells aggregated for the cell, an (absolute time) duration of a time resource (e.g., a subframe, a slot, or a TTI) including the same number of symbols may be different among the aggregated cells. Herein, symbols may include OFDM symbols (or Cyclic Prefix (CP)-OFDM symbols), SC-FDMA symbols (or Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbols).

[0083] Referring to FIG. 6, downlink and uplink transmissions are organized into frames. Each frame has Tf= 10ms duration. Each frame is divided into two half-frames, where each of the half-frames has 5ms duration. Each half-frame consists of 5 subframes, where the duration Tsfper subframe is 1ms. Each subframe is divided into slots and the number of slots in a subframe depends on a subcarrier spacing. Each slot includes 14 or 12 OFDM symbols based on a CP. In a normal CP, each slot includes 14 OFDM symbols and, in an extended CP, each slot includes 12 OFDM symbols. The numerology is based on exponentially scalable subcarrier spacing △f = 2u*15 kHz.

[0084] Table 3 shows the number of OFDM symbols per slot Nslotsymb, the number of slots per frame Nframe,uslot, and the number of slots per subframe Nsubframe,uslotfor the normal CP, according to the subcarrier spacing Δf= 2u*15 kHz.

[0085] uNslotsymbNframe,uslotNsubframe,uslot01410111420221440431480841416016

[0086] Table 4 shows the number of OFDM symbols per slot Nslotsymb, the number of slots per frame Nframe,uslot, and the number of slots per subframe Nsubframe,uslotfor the extended CP, according to the subcarrier spacing △f = 2u*15 kHz.

[0087] uNslotsymbNframe,uslotNsubframe,uslot212404

[0088] A slot includes plural symbols (e.g., 14 or 12 symbols) in the time domain. For each numerology (e.g., subcarrier spacing) and carrier, a resource grid of Nsize,ugrid,x*NRBscsubcarriers and Nsubframe,usymbOFDM symbols is defined, starting at Common Resource Block (CRB) Nstart,ugridindicated by higher-layer signaling (e.g., RRC signaling), where Nsize,ugrid,xis the number of Resource Blocks (RBs) in the resource grid and the subscript x is DL for downlink and UL for uplink. NRBscis the number of subcarriers per RB. In the 3GPP based wireless communication system, NRBscis 12 generally. There is one resource grid for a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL). The carrier bandwidth Nsize,ugridfor subcarrier spacing configuration u is given by the higher-layer parameter (e.g., RRC parameter). Each element in the resource grid for the antenna port p and the subcarrier spacing configuration u is referred to as a Resource Element (RE) and one complex symbol may be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l representing a symbol location relative to a reference point in the time domain. In the 3GPP based wireless communication system, an RB is defined by 12 consecutive subcarriers in the frequency domain.

[0089] In the 3GPP NR system, RBs are classified into CRBs and Physical Resource Blocks (PRBs). CRBs are numbered from 0 and upwards in the frequency domain for subcarrier spacing configuration u. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u coincides with 'point A' which serves as a common reference point for resource block grids. In the 3GPP NR system, PRBs are defined within a BandWidth Part (BWP) and numbered from 0 to NsizeBWP,i-1, where i is the number of the bandwidth part. The relation between the physical resource block nPRBin the bandwidth part i and the common resource block nCRBis as follows: nPRB= nCRB+ NsizeBWP,i, where NsizeBWP,iis the common resource block where bandwidth part starts relative to CRB 0. The BWP includes a plurality of consecutive RBs. A carrier may include a maximum of N (e.g., 5) BWPs. A UE may be configured with one or more BWPs on a given component carrier. Only one BWP among BWPs configured to the UE can active at a time. The active BWP defines the UE's operating bandwidth within the cell's operating bandwidth.

[0090] In the present disclosure, the term "cell" may refer to a geographic area to which one or more nodes provide a communication system, or refer to radio resources. A "cell" as a geographic area may be understood as coverage within which a node can provide service using a carrier and a "cell" as radio resources (e.g., time-frequency resources) is associated with bandwidth which is a frequency range configured by the carrier. The "cell" associated with the radio resources is defined by a combination of downlink resources and uplink resources, for example, a combination of a DL Component Carrier (CC) and a UL CC. The cell may be configured by downlink resources only, or may be configured by downlink resources and uplink resources. Since DL coverage, which is a range within which the node is capable of transmitting a valid signal, and UL coverage, which is a range within which the node is capable of receiving the valid signal from the UE, depends upon a carrier carrying the signal, the coverage of the node may be associated with coverage of the "cell" of radio resources used by the node. Accordingly, the term "cell" may be used to represent service coverage of the node sometimes, radio resources at other times, or a range that signals using the radio resources can reach with valid strength at other times.

[0091] In CA, two or more CCs are aggregated. A UE may simultaneously receive or transmit on one or multiple CCs depending on its capabilities. CA is supported for both contiguous and non-contiguous CCs. When CA is configured, the UE only has one RRC connection with the network. At RRC connection establishment / re-establishment / handover, one serving cell provides the NAS mobility information, and at RRC connection re-establishment / handover, one serving cell provides the security input. This cell is referred to as the Primary Cell (PCell). The PCell is a cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure. Depending on UE capabilities, Secondary Cells (SCells) can be configured to form together with the PCell a set of serving cells. An SCell is a cell providing additional radio resources on top of Special Cell (SpCell). The configured set of serving cells for a UE therefore always consists of one PCell and one or more SCells. For Dual Connectivity (DC) operation, the term SpCell refers to the PCell of the Master Cell Group (MCG) or the Primary SCell (PSCell) of the Secondary Cell Group (SCG). An SpCell supports Physical Uplink Control Channel (PUCCH) transmission and contention-based random access, and is always activated. The MCG is a group of serving cells associated with a master node, comprised of the SpCell (PCell) and optionally one or more SCells. The SCG is the subset of serving cells associated with a secondary node, comprised of the PSCell and zero or more SCells, for a UE configured with DC. For a UE in RRC_CONNECTED not configured with CA / DC, there is only one serving cell comprised of the PCell. For a UE in RRC_CONNECTED configured with CA / DC, the term "serving cells" is used to denote the set of cells comprised of the SpCell(s) and all SCells. In DC, two MAC entities are configured in a UE: one for the MCG and one for the SCG.

[0092] FIG. 7 shows a data flow example in the 3GPP NR system to which implementations of the present disclosure are applied.

[0093] Referring to FIG. 7, "RB" denotes a radio bearer, and "H" denotes a header. Radio bearers are categorized into two groups: DRBs for user plane data and SRBs for control plane data. The MAC PDU is transmitted / received using radio resources through the PHY layer to / from an external device. The MAC PDU arrives to the PHY layer in the form of a transport block.

[0094] In the PHY layer, the uplink transport channels UL-SCH and Random Access Channel (RACH) are mapped to their physical channels Physical Uplink Shared Channel (PUSCH) and Physical Random Access Channel (PRACH), respectively, and the downlink transport channels DL-SCH, BCH and PCH are mapped to Physical Downlink Shared Channel (PDSCH), Physical Broadcast Channel (PBCH) and PDSCH, respectively. In the PHY layer, Uplink Control Information (UCI) is mapped to PUCCH, and Downlink Control Information (DCI) is mapped to Physical Downlink Control Channel (PDCCH). A MAC PDU related to UL-SCH is transmitted by a UE via a PUSCH based on an UL grant, and a MAC PDU related to DL-SCH is transmitted by a BS via a PDSCH based on a DL assignment.

[0095] Hereinafter, technical features related to cell selection and reselection are described. Section 5.2 of 3GPP TS 38.304 V17.6.0 may be referred.

[0096] UE shall perform measurements for cell selection and reselection purposes as specified in TS 38.133 [8].

[0097] When evaluating Srxlev and Squal of non-serving cells for reselection evaluation purposes, the UE shall use parameters provided by the serving cell and for the final check on cell selection criterion, the UE shall use parameters provided by the target cell for cell reselection.

[0098] The NAS can control the RAT(s) in which the cell selection should be performed, for instance by indicating RAT(s) associated with the selected PLMN, and by maintaining a list of forbidden registration area(s) and a list of equivalent PLMNs. The UE shall select a suitable cell based on RRC_IDLE or RRC_INACTIVE state measurements and cell selection criteria.

[0099] In order to expedite the cell selection process, stored information for several RATs, if available, may be used by the UE.

[0100] When camped on a cell, the UE shall regularly search for a better cell according to the cell reselection criteria. If a better cell is found, that cell is selected. The change of cell may imply a change of RAT. Details on performance requirements for cell reselection can be found in TS 38.133 [8].

[0101] The NAS is informed if the cell selection and reselection result in changes in the received system information relevant for NAS.

[0102] For normal service, the UE shall camp on a suitable cell, monitor control channel(s) of that cell so that the UE can:

[0103] 1> receive system information from the PLMN or SNPN; and

[0104] 2> receive registration area information from the PLMN or SNPN, e.g., tracking area information; and

[0105] 2> receive other AS and NAS Information; and

[0106] 1> if registered:

[0107] 2> receive paging and notification messages from the PLMN or SNPN; and

[0108] 2> initiate transfer to Connected mode.

[0109] For cell selection in multi-beam operations, measurement quantity of a cell is up to UE implementation.

[0110] For cell reselection in multi-beam operations, including inter-RAT reselection from E-UTRA to NR, the measurement quantity of this cell is derived amongst the beams corresponding to the same cell based on SS / PBCH block as follows:

[0111] 1> ifnrofSS-BlocksToAverage (maxRS-IndexCellQualin E-UTRA) is not configured inSIB2 / SIB4(SIB24in E-UTRA); or

[0112] 1> ifabsThreshSS-BlocksConsolidation(threshRS-Indexin E-UTRA) is not configured inSIB2 / SIB4(SIB24in E-UTRA); or

[0113] 1> if the highest beam measurement quantity value is below or equal toabsThreshSS-BlocksConsolidation(threshRS-Indexin E-UTRA):

[0114] 2> derive a cell measurement quantity as the highest beam measurement quantity value, where each beam measurement quantity is described in TS 38.215

[0011] .

[0115] 1> else:

[0116] 2> derive a cell measurement quantity as the linear average of the power values of up tonrofSS-BlocksToAverage(maxRS-IndexCellQualin E-UTRA) of highest beam measurement quantity values aboveabsThreshSS-BlocksConsolidation(threshRS-Indexin E-UTRA).

[0117] NOTE: If both suitable cell(s) and suitable L2 U2N Relay UE(s) (as specified in TS 38.331 [3]) are available, it is up to L2 U2N Remote UE's implementation to select either a suitable cell or a suitable L2 U2N Relay UE.

[0118] Cell selection is performed by one of the following two procedures:

[0119] a) Initial cell selection (no prior knowledge of which RF channels are NR frequencies):

[0120] 1. The UE shall scan all RF channels in the NR bands according to its capabilities to find a suitable cell.

[0121] 2. On each frequency, the UE need only search for the strongest cell, except for operation with shared spectrum channel access where the UE may search for the next strongest cell(s).

[0122] 3. Once a suitable cell is found, this cell shall be selected.

[0123] b) Cell selection by leveraging stored information:

[0124] 1. This procedure requires stored information of frequencies and optionally also information on cell parameters from previously received measurement control information elements or from previously detected cells.

[0125] 2. Once the UE has found a suitable cell, the UE shall select it.

[0126] 3. If no suitable cell is found, the initial cell selection procedure in a) shall be started.

[0127] NOTE: Priorities between different frequencies or RATs provided to the UE by system information or dedicated signalling are not used in the cell selection process.

[0128] For cell reselection absolute priorities of different NR frequencies or inter-RAT frequencies may be provided to the UE in the system information, in theRRCReleasemessage, or by inheriting from another RAT at inter-RAT cell (re)selection. In the case of system information, an NR frequency or inter-RAT frequency may be listed without providing a priority (i.e. the fieldcellReselectionPriorityis absent for that frequency). If any fields withcellReselectionPriorityornsag-CellReselectionPriorityare provided in dedicated signalling, the UE shall ignore any fields withcellReselectionPriorityandnsag-CellReselectionPriorityprovided in system information.

[0129] When UE is in camped normally state, if it supports slice-based cell reselection and has received the network slice(s) and NSAG information from NAS to be used for cell reselection, UE shall derive reselection priorities according to clause 5.2.4.11.

[0130] NOTE 00: UE derives reselection priorities according to clause 5.2.4.11 also in case SIB16 (see TS 38.331 [3]) is not broadcast in the camped cell.

[0131] If UE is in camped on any cell state, UE shall only apply the priorities provided by system information from current cell, and the UE preserves priorities provided by dedicated signalling anddeprioritisationReqreceived inRRCReleaseunless specified otherwise. When the UE in camped normally state, has only dedicated priorities other than for the current frequency, the UE shall consider the current frequency to be the lowest priority frequency (i.e. lower than any of the network configured values). When the HSDN capable UE is in High-mobility state, the UE shall always consider the HSDN cells to be the highest priority (i.e., higher than any other network configured priorities). When the HSDN capable UE is not in High-mobility state, the UE shall always consider HSDN cells to be the lowest priority (i.e., lower than any other network configured priorities). If the UE is configured to perform both NR sidelink communication and V2X sidelink communication, the UE may consider the frequency providing both NR sidelink communication configuration and V2X sidelink communication configuration to be the highest priority. If the UE is configured to perform NR sidelink communication and not perform V2X communication, the UE may consider the frequency providing NR sidelink communication configuration to be the highest priority. If the UE is configured to perform V2X sidelink communication and not perform NR sidelink communication, the UE may consider the frequency providing V2X sidelink communication configuration to be the highest priority.

[0132] NOTE 0a: The frequency only providing the anchor frequency configuration should not be prioritized for V2X service during cell reselection, as specified in TS 38.331[3].

[0133] NOTE 0b: When UE is configured to perform NR sidelink communication or V2X sidelink communication performs cell reselection, it may consider the frequencies providing the intra-carrier and inter-carrier configuration have equal priority in cell reselection.

[0134] NOTE 0c: The prioritization among the frequencies which UE considers to be the highest priority frequency is left to UE implementation unless otherwise stated.

[0135] NOTE 0d: The UE is configured to perform V2X sidelink communication or NR sidelink communication, if it has the capability and is authorized for the corresponding sidelink operation.

[0136] NOTE 0e: When UE is configured to perform both NR sidelink communication and V2X sidelink communication, but cannot find a frequency which can provide both NR sidelink communication configuration and V2X sidelink communication configuration, UE may consider the frequency providing either NR sidelink communication configuration or V2X sidelink communication configuration to be the highest priority.

[0137] NOTE 0f: Void.

[0138] The UE shall only perform cell reselection evaluation for NR frequencies and inter-RAT frequencies that are given in system information and for which the UE has a priority provided.

[0139] If the MBS broadcast capable UE is receiving or interested to receive an MBS broadcast service(s) and can only receive this MBS broadcast service(s) by camping on a frequency on which it is provided, the UE may consider that frequency to be the highest priority during the MBS broadcast session as specified in TS 38.300 [2] as long as the two following conditions are fulfilled:

[0140] 1) SIB1 scheduling information of the cell reselected by the UE due to frequency prioritization for MBS contains SIB20;

[0141] 2) Either:

[0142] - One or more MBS FSAI(s) of that frequency is indicated in SIB21 of the serving cell and the same MBS FSAI(s) is also indicated for this MBS broadcast service in MBS User Service Description (USD) as specified in TS 26.346

[0020] , or

[0143] - SIB21 is not provided in the serving cell and that frequency is included in the USD of this service, or

[0144] - SIB21 is provided in the serving cell but does not provide the frequency mapping for the concerned service, and that frequency is included in the USD of this service.

[0145] NOTE 0g: It is up to UE implementation which frequency to select, when the USD provides multiple frequencies for the service the UE is interested in.

[0146] If the MBS broadcast capable UE is receiving or interested to receive an MBS broadcast service, the UE may consider cell reselection candidate frequencies at which it cannot receive the MBS broadcast service to be of the lowest priority during the MBS broadcast session as specified in TS 38.300 [2], as long as SIB1 scheduling information of the cell contains SIB20 on the MBS frequency which the UE monitors and as long as the condition 2) above is fulfilled for the serving cell.

[0147] NOTE 0h: Example scenarios in which such down-prioritisation may be needed include the cases where camping is not possible for the UE on the MBS broadcast frequency (e.g. the MBS broadcast frequency belongs to a PLMN different from UE's registered PLMN) while the UE can receive the MBS broadcast service when camped on another frequency than the MBS broadcast frequency or current frequency.

[0148] NOTE 0i: The frequency prioritization for MBS broadcast, NR sidelink communication, or V2X sidelink communication may override the re-selection priorities for slice-based cell reselection.

[0149] In case UE receivesRRCReleasewithdeprioritisationReq, UE shall consider current frequency and stored frequencies due to the previously receivedRRCReleasewithdeprioritisationReqor all the frequencies of NR to be the lowest priority frequency (i.e. lower than any of the network configured values) while T325 is running irrespective of camped RAT. The UE shall delete the storeddeprioritisationrequest(s) when a PLMN selection or SNPN selection is performed on request by NAS (TS 23.122 [9]).

[0150] NOTE 1: UE should search for a higher priority layer for cell reselection as soon as possible after the change of priority. The minimum related performance requirements specified in TS 38.133 [8] are still applicable.

[0151] NOTE 1a: The UE does not consider MBS broadcast, NR sidelink communication or V2X sidelink communication functionality to replace cell reselection priorities caused by HSDN ordeprioritisationReqfunctionality.

[0152] The UE shall delete priorities provided by dedicated signalling when:

[0153] - the UE enters a different RRC state; or

[0154] - the optional validity time of dedicated priorities (T320) expires; or

[0155] - the UE receives anRRCReleasemessage with the fieldcellReselectionPrioritiesabsent; or

[0156] - a PLMN selection or SNPN selection is performed on request by NAS (TS 23.122 [9]).

[0157] NOTE 2: Equal priorities between RATs are not supported.

[0158] The UE shall not consider any exclude-listed cells as candidate for cell reselection.

[0159] The UE shall consider only the allow-listed cells, if configured, as candidates for cell reselection.

[0160] The UE in RRC_IDLE state shall inherit the priorities provided by dedicated signalling and the remaining validity time (i.e. T320 in NR and E-UTRA), if configured, at inter-RAT cell (re)selection.

[0161] NOTE 3: The network may assign dedicated cell reselection priorities for frequencies not configured by system information.

[0162] Following rules are used by the UE to limit needed measurements:

[0163] - If the serving cell fulfils Srxlev> SIntraSearchPand Squal > SIntraSearchQ:

[0164] - IfdistanceThreshandreferenceLocationare broadcasted in SIB19, and if UE supports location-based measurement initiation and has obtained its location information:

[0165] - If the distance between UE and the serving cell reference locationreferenceLocationis shorter thandistanceThresh, the UE may not perform intra-frequency measurements;

[0166] - Else, the UE shall perform intra-frequency measurements;

[0167] - Else, the UE may not perform intra-frequency measurements;

[0168] - Else, the UE shall perform intra-frequency measurements.

[0169] - The UE shall apply the following rules for NR inter-frequencies and inter-RAT frequencies which are indicated in system information and for which the UE has priority provided as defined in 5.2.4.1:

[0170] - For a NR inter-frequency or inter-RAT frequency with a reselection priority higher than the reselection priority of the current NR frequency, the UE shall perform measurements of higher priority NR inter-frequency or inter-RAT frequencies according to TS 38.133 [8].

[0171] - For a NR inter-frequency with an equal or lower reselection priority than the reselection priority of the current NR frequency and for inter-RAT frequency with lower reselection priority than the reselection priority of the current NR frequency:

[0172] - If the serving cell fulfils Srxlev > SnonIntraSearchPand Squal > SnonIntraSearchQ:

[0173] - IfdistanceThreshandreferenceLocationare broadcasted in SIB19, and if UE supports location-based measurement initiation and has obtained its UE location information:

[0174] - If the distance between UE and the serving cell reference locationreferenceLocationis shorter thandistanceThresh, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0175] - Else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8];

[0176] - Else, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0177] - Else,the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8].

[0178] - If the UE supports relaxed measurement andrelaxedMeasurementis present inSIB2, the UE may further relax the needed measurements, as specified in clause 5.2.4.9.

[0179] If thet-Serviceof the serving cell is present in SIB19, and if UE supports time-based measurement initiation, the UE shall perform intra-frequency, inter-frequency or inter-RAT measurements before the t-Service, regardless of the distance between UE and the serving cell reference location or whether the serving cell fulfils Srxlev > SIntraSearchPand Squal > SIntraSearchQ, or Srxlev > SnonIntraSearchPand Squal > SnonIntraSearchQ, The exact time to start measurement beforet-Serviceis up to UE implementation. UE shall perform measurements of higher priority NR inter-frequency or inter-RAT frequencies according to TS 38.133 [8] regardless of the remaining service time of the serving cell (i.e. time remaining untilt-Service).

[0180] NOTE: When evaluating the distance between UE and the serving cell reference location, it's up to UE implementation to obtain UE location information.

[0181] Hereinafter, technical features related to measurement configuration are described. Sections 5.5.1 of 3GPP TS 38.331 v17.5.0 may be referred.

[0182] The network may configure an RRC_CONNECTED UE to perform measurements. The network may configure the UE to report them in accordance with the measurement configuration or perform conditional reconfiguration evaluation in accordance with the conditional reconfiguration. The measurement configuration is provided by means of dedicated signalling i.e. using the RRCReconfiguration or RRCResume.

[0183] The network may configure the UE to perform the following types of measurements:

[0184] - NR measurements;

[0185] - Inter-RAT measurements of E-UTRA frequencies;

[0186] - Inter-RAT measurements of UTRA-FDD frequencies;

[0187] - NR sidelink measurements of L2 U2N Relay UEs.

[0188] The network may configure the UE to report the following measurement information based on SS / PBCH block(s):

[0189] - Measurement results per SS / PBCH block;

[0190] - Measurement results per cell based on SS / PBCH block(s);

[0191] - SS / PBCH block(s) indexes.

[0192] The network may configure the UE to report the following measurement information based on CSI-RS resources:

[0193] - Measurement results per CSI-RS resource;

[0194] - Measurement results per cell based on CSI-RS resource(s);

[0195] - CSI-RS resource measurement identifiers.

[0196] The network may configure the UE to perform the following types of measurements for NR sidelink and V2X sidelink:

[0197] - CBR measurements.

[0198] The network may configure the UE to report the following CLI measurement information based on SRS resources:

[0199] - Measurement results per SRS resource;

[0200] - SRS resource(s) indexes.

[0201] The network may configure the UE to report the following CLI measurement information based on CLI-RSSI resources:

[0202] - Measurement results per CLI-RSSI resource;

[0203] - CLI-RSSI resource(s) indexes.

[0204] The network may configure the UE to report the following Rx-Tx time difference measurement information based on CSI-RS for tracking or PRS:

[0205] - UE Rx-Tx time difference measurement result.

[0206] The measurement configuration includes the following parameters:

[0207] 1. Measurement objects: A list of objects on which the UE shall perform the measurements.

[0208] - For intra-frequency and inter-frequency measurements a measurement object indicates the frequency / time location and subcarrier spacing of reference signals to be measured. Associated with this measurement object, the network may configure a list of cell specific offsets, a list of 'exclude-listed' cells and a list of 'allow-listed' cells. Exclude-listed cells are not applicable in event evaluation or measurement reporting. Allow-listed cells are the only ones applicable in event evaluation or measurement reporting.

[0209] - The measObjectId of the MO which corresponds to each serving cell is indicated by servingCellMO within the serving cell configuration.

[0210] - For inter-RAT E-UTRA measurements a measurement object is a single E-UTRA carrier frequency. Associated with this E-UTRA carrier frequency, the network can configure a list of cell specific offsets and a list of 'exclude-listed' cells. Exclude-listed cells are not applicable in event evaluation or measurement reporting.

[0211] - For inter-RAT UTRA-FDD measurements a measurement object is a set of cells on a single UTRA-FDD carrier frequency.

[0212] - For NR sidelink measurements of L2 U2N Relay UEs, a measurement object is a single NR sidelink frequency to be measured.

[0213] - For CBR measurement of NR sidelink communication, a measurement object is a set of transmission resource pool(s) on a single carrier frequency for NR sidelink communication.

[0214] - For CBR measurement of NR sidelink discovery, a measurement object is a set of discovery dedicated resource pool(s) or transmission resource pool(s) also used for NR sidelink discovery on a single carrier frequency for NR sidelink discovery.

[0215] - For CLI measurements a measurement object indicates the frequency / time location of SRS resources and / or CLI-RSSI resources, and subcarrier spacing of SRS resources to be measured.

[0216] 2. Reporting configurations: A list of reporting configurations where there can be one or multiple reporting configurations per measurement object. Each measurement reporting configuration consists of the following:

[0217] - Reporting criterion: The criterion that triggers the UE to send a measurement report. This can either be periodical or a single event description.

[0218] - RS type: The RS that the UE uses for beam and cell measurement results (SS / PBCH block or CSI-RS).

[0219] - Reporting format: The quantities per cell and per beam that the UE includes in the measurement report (e.g. RSRP) and other associated information such as the maximum number of cells and the maximum number beams per cell to report.

[0220] In case of conditional reconfiguration, each configuration consists of the following:

[0221] - Execution criteria: The criteria the UE uses for conditional reconfiguration execution.

[0222] - RS type: The RS that the UE uses for obtaining beam and cell measurement results (SS / PBCH block-based or CSI-RS-based), used for evaluating conditional reconfiguration execution condition.

[0223] 3. Measurement identities: For measurement reporting, a list of measurement identities where each measurement identity links one measurement object with one reporting configuration. By configuring multiple measurement identities, it is possible to link more than one measurement object to the same reporting configuration, as well as to link more than one reporting configuration to the same measurement object. The measurement identity is also included in the measurement report that triggered the reporting, serving as a reference to the network. For conditional reconfiguration triggering, one measurement identity links to exactly one conditional reconfiguration trigger configuration. And up to 2 measurement identities can be linked to one conditional reconfiguration execution condition.

[0224] 4. Quantity configurations: The quantity configuration defines the measurement filtering configuration used for all event evaluation and related reporting, and for periodical reporting of that measurement. For NR measurements, the network may configure up to 2 quantity configurations with a reference in the NR measurement object to the configuration that is to be used. In each configuration, different filter coefficients can be configured for different measurement quantities, for different RS types, and for measurements per cell and per beam.

[0225] 5. Measurement gaps: Periods that the UE may use to perform measurements.

[0226] A UE in RRC_CONNECTED maintains a measurement object list, a reporting configuration list, and a measurement identities list according to signalling and procedures in this specification. The measurement object list possibly includes NR measurement object(s), CLI measurement object(s), inter-RAT objects, and L2 U2N Relay objects. Similarly, the reporting configuration list includes NR, inter-RAT, and L2 U2N Relay reporting configurations. Any measurement object can be linked to any reporting configuration of the same RAT type. Some reporting configurations may not be linked to a measurement object. Likewise, some measurement objects may not be linked to a reporting configuration.

[0227] The measurement procedures distinguish the following types of cells:

[0228] 1. The NR serving cell(s) - these are the SpCell and one or more SCells.

[0229] 2. Listed cells - these are cells listed within the measurement object(s).

[0230] 3. Detected cells - these are cells that are not listed within the measurement object(s) but are detected by the UE on the SSB frequency(ies) and subcarrier spacing(s) indicated by the measurement object(s).

[0231] For NR measurement object(s), the UE measures and reports on the serving cell(s) / serving Relay UE (for L2 U2N Remote UE), listed cells and / or detected cells. For inter-RAT measurements object(s) of E-UTRA, the UE measures and reports on listed cells and detected cells and, for RSSI and channel occupancy measurements, the UE measures and reports on the configured resources on the indicated frequency. For inter-RAT measurements object(s) of UTRA-FDD, the UE measures and reports on listed cells. For CLI measurement object(s), the UE measures and reports on configured measurement resources (i.e. SRS resources and / or CLI-RSSI resources). For L2 U2N Relay object(s), the UE measures and reports on the serving NR cell(s), as well as the discovered L2 U2N Relay UEs.

[0232] Whenever the procedural specification, other than contained in clause 5.5.2, refers to a field it concerns a field included in the VarMeasConfig unless explicitly stated otherwise i.e. only the measurement configuration procedure covers the direct UE action related to the received measConfig.

[0233] In NR-DC, the UE may receive two independent measConfig:

[0234] - a measConfig, associated with MCG, that is included in the RRCReconfiguration message received via SRB1; and

[0235] - a measConfig, associated with SCG, that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1.

[0236] In this case, the UE maintains two independent VarMeasConfig and VarMeasReportList, one associated with each measConfig, and independently performs all the procedures in clause 5.5 for each measConfig and the associated VarMeasConfig and VarMeasReportList, unless explicitly stated otherwise.

[0237] The configurations related to CBR measurements are only included in the measConfig associated with MCG.

[0238] The configurations related to Rx-Tx time difference measurement are only included in the measConfig associated with MCG.

[0239] In the RRC Connected state, the network may configure a dedicated measurement configuration for the UE. For example, the network may configure a dedicated measurement configuration according to the UE's specific situation, such as its mobility status, location, data usage, etc. Then the UE may perform measurements based on the dedicated measurement configuration.

[0240] On the other hand, in the RRC Idle / Inactive state, the UE may perform measurements based on common system information. This configuration may not reflect the UE's specific situation. Even though the network may configure UE-specific cell reselection-related settings, these may only include priority-related configurations. If there is ongoing data and the UE transitions to the inactive state, the measurement targets and the best cell determination may differ according to common system information, unlike in the RRC Connected state where the settings are based on the UE's situation. As a result, during reconnection, there may be an increase in UE context and data-related inter-node signaling due to unexpected cell changes. Additionally, it may become more challenging to perform seamless handover or reselection.

[0241] Additionally, considering the power consumption of the UE, AI / ML may not be utilized as a UE-sided model during the RRC Idle / Inactive state. In a scenario where there is ongoing data, and AI may be used for predictive RRM use cases, if the network configures target cells and conditions based on predictive measurements, the UE may perform general cell reselection during the idle / inactive state without reflecting the predictive measurement-based content. This may reduce the effectiveness of AI utilization considering the UE's situation.

[0242] For this purpose, NW may transmit frequency information related to specific AI / ML functionalities / models by configuring broadcast information such as SIB4. However, broadcast information may not be used to dynamically configure a specific UE. Although conventionally RRC release messages containing priority information may be utilized to configure specific frequencies with priority at the time of release, this cannot be controlled per AI / ML function / model and the valid time per AI / ML function is difficult to apply.

[0243] According to implementations of the present disclosure, a method of RRC state independent measurement is provided. The network may indicate to utilize the measurement configuration (e.g., configured in the RRC connected state) for cell reselection during RRC idle / inactive state. According to this indication, the UE may apply the measurement configuration for the cell reselection, e.g., when determining the target frequency and / or cell.

[0244] The following drawings are created to explain specific embodiments of the present disclosure. The names of the specific devices or the names of the specific signals / messages / fields shown in the drawings are provided by way of example, and thus the technical features of the present disclosure are not limited to the specific names used in the following drawings.

[0245] An embodiment of the present disclosure related to a specific drawing described below may be combined with various embodiments of the present disclosure related to other drawings, and some descriptions, functions, procedures, proposals, methods and / or operations of the embodiment may be omitted.

[0246] FIG. 8 shows an example of a method performed by a wireless device to which the implementations of the present disclosure are applied.

[0247] In step S800, the method comprises receiving a measurement configuration from a network.

[0248] In step S810, the method comprises receiving a release message from the network. The release message includes information informing that the measurement configuration is maintained.

[0249] In step S820, the method comprises performing a cell reselection based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

[0250] In some implementations, the receiving the measurement configuration may be performed while in a radio resource control (RRC) connected state.

[0251] In some implementations, the information may inform that the measurement configuration configured in the RRC connected state is maintained in an RRC idle state and / or RRC inactive state.

[0252] In some implementations, that the measurement configuration is maintained may comprise that the measurement configuration is not removed and / or released in the RRC idle state and / or the RRC inactive state.

[0253] In some implementations, the measurement configuration may be associated with a functionality and / or a model.

[0254] In some implementations, the functionality and / or the model may be related to an Artificial Intelligence (AI) / Machine Learning (ML) operation.

[0255] In some implementations, the measurement configuration may be linked to a specific ID related to the functionality and / or the model.

[0256] In some implementations, the specific ID may be an associated ID related to association between the measurement configuration and / the functionality and / or the model.

[0257] In some implementations, the information may further inform that the functionality and / or the model is maintained.

[0258] In some implementations, the wireless device may transition from the RRC connected state to an idle / inactive state after receiving the release message.

[0259] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results based on the measurement configuration; and performing, by the wireless device, the cell reselection based on the measurement results.

[0260] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration and performing, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a report condition included in the measurement configuration.

[0261] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration and performing, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria.

[0262] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells indicated system information; and re-ordering, by the wireless device, cell priorities of the frequencies and / or cells, by the wireless device, based on the measurement configuration; and performing, by the wireless device, the cell reselection to a cell based on the re-ordered cell priorities.

[0263] In some implementations, a frequency and / or cell included in the measurement configuration may have a higher priority than a frequency and / or a cell included in the system information.

[0264] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells included in i) system information and / or ii) the measurement configuration and performing the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria and / or a report condition included in the measurement configuration.

[0265] In some implementations, the method may further comprise: maintaining, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration while a valid time is not expired, after performing the cell reselection.

[0266] In some implementations, the method may further comprise: removing and / or releasing, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration, upon expiry of the valid time.

[0267] In some implementations, the method may further comprise: removing and / or releasing, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration after performing the cell reselection.

[0268] In some implementations, the wireless device may communicate with at least one of a mobile device, a network, and / or an autonomous vehicle other than the wireless device.

[0269] Furthermore, the wireless device may be implemented by the first wireless device 100 shown in FIG. 2, and / or the UE 100 shown in FIG. 3.

[0270] More specifically, the wireless device comprises at least one transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions. Operations performed based on the instructions being executed by the at least one processor are as follows.

[0271] The wireless device receives a measurement configuration from a network.

[0272] The wireless device receives a release message from the network. the release message includes information informing that the measurement configuration is maintained.

[0273] The wireless device performs a cell reselection based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

[0274] In some implementations, the receiving the measurement configuration may be performed while in a radio resource control (RRC) connected state.

[0275] In some implementations, the information may inform that the measurement configuration configured in the RRC connected state is maintained in an RRC idle state and / or RRC inactive state.

[0276] In some implementations, that the measurement configuration is maintained may comprise that the measurement configuration is not removed and / or released in the RRC idle state and / or the RRC inactive state.

[0277] In some implementations, the measurement configuration may be associated with a functionality and / or a model.

[0278] In some implementations, the functionality and / or the model may be related to an Artificial Intelligence (AI) / Machine Learning (ML) operation.

[0279] In some implementations, the measurement configuration may be linked to a specific ID related to the functionality and / or the model.

[0280] In some implementations, the specific ID may be an associated ID related to association between the measurement configuration and / the functionality and / or the model.

[0281] In some implementations, the information may further inform that the functionality and / or the model is maintained.

[0282] In some implementations, the wireless device may transition from the RRC connected state to an idle / inactive state after receiving the release message.

[0283] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results based on the measurement configuration; and performing, by the wireless device, the cell reselection based on the measurement results.

[0284] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration and performing, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a report condition included in the measurement configuration.

[0285] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration and performing, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria.

[0286] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells indicated system information; and re-ordering, by the wireless device, cell priorities of the frequencies and / or cells, by the wireless device, based on the measurement configuration; and performing, by the wireless device, the cell reselection to a cell based on the re-ordered cell priorities.

[0287] In some implementations, a frequency and / or cell included in the measurement configuration may have a higher priority than a frequency and / or a cell included in the system information.

[0288] In some implementations, performing of the cell reselection based on the measurement configuration may comprise: deriving, by the wireless device, measurement results of frequencies and / or cells included in i) system information and / or ii) the measurement configuration and performing the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria and / or a report condition included in the measurement configuration.

[0289] In some implementations, the wireless device may further: maintain, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration while a valid time is not expired, after performing the cell reselection.

[0290] In some implementations, the wireless device may further: remove and / or release, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration, upon expiry of the valid time.

[0291] In some implementations, the wireless device may further: remove and / or release, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration after performing the cell reselection.

[0292] In some implementations, the wireless device may communicate with at least one of a mobile device, a network, and / or an autonomous vehicle other than the wireless device.

[0293] Furthermore, the method described above in FIG. 8 may be performed by control of a processing apparatus. The processing apparatus may be implemented by the processor 102 included in the first wireless device 100 shown in FIG. 2 and / or the processor 102 included in the UE 100 shown in FIG. 3.

[0294] More specifically, the processing apparatus comprises at least one processor that is integrated with a wireless device, and at least one memory comprising processor-executable instructions stored thereon that are configured to cause the at least one processor to perform the method described in FIG. 8.

[0295] Furthermore, the method described above in FIG. 8 may be performed by a software code 105 stored in the memory 104 included in the first wireless device 100 shown in FIG. 2.

[0296] The technical features of the present disclosure may be embodied directly in hardware, in a software executed by a processor, or in a combination of the two. For example, a method performed by a wireless device in a wireless communication may be implemented in hardware, software, firmware, or any combination thereof. For example, a software may reside in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable disk, a CD-ROM, or any other storage medium.

[0297] Some example of storage medium may be coupled to the processor such that the processor can read information from the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. For other example, the processor and the storage medium may reside as discrete components.

[0298] The computer-readable medium may include a tangible and non-transitory computer-readable storage medium.

[0299] For example, non-transitory computer-readable media may include RAM such as Synchronous DRAM (SDRAM), ROM, Non-Volatile RAM (NVRAM), EEPROM, flash memory, magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures. Non-transitory computer-readable media may also include combinations of the above.

[0300] In addition, the method described herein may be realized at least in part by a computer-readable communication medium that carries or communicates code in the form of instructions or data structures and that can be accessed, read, and / or executed by a computer.

[0301] More specifically, a non-transitory Computer-Readable Medium (CRM) stores instructions that, based on being executed by at least one processor, perform the method described in FIG. 8.

[0302] FIG. 9 shows an example of a method performed by a base station to which implementations of the present disclosure are applied.

[0303] In step S900, the method comprises transmitting a measurement configuration to a wireless device.

[0304] In step S910, the method comprises transmitting a release message to the wireless device. The release message includes information informing that the measurement configuration is maintained. a cell reselection is performed based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

[0305] Furthermore, the method in perspective of the base station described above in FIG. 9 may be performed by the second wireless device 200 shown in FIG. 2.

[0306] More specifically, the base station comprises at least one transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions. Operations performed based on the instructions being executed by the at least one processor are as follows.

[0307] The base station transmits a measurement configuration to a wireless device.

[0308] the base station transmits a release message to the wireless device. The release message includes information informing that the measurement configuration is maintained. a cell reselection is performed based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.

[0309] FIG. 10 shows an example of utilizing a measurement configuration to perform cell (re)selection to which implementations of the present disclosure are applied.

[0310] Step S1000: The network configures measurement related configuration in connected state.

[0311] In this step, the network may configure measurement related configuration in connected state.

[0312] (1) The measurement related configuration may include measurement object related configuration.

[0313] 1) For example, the measurement object related configuration may include frequency / band information.

[0314] 2) For example, the measurement object related configuration may include resource / resource set information in time / frequency / spatial domain.

[0315] - resource information may include downlink radio resource related information, such as Synchronization signal block (SSB), Channel state information reference signal (CSI-RS). Each resource / resource set may have a resource / resource set ID

[0316] 3) For example, the measurement object related configuration may include cell / cell list information associated with frequency / band information and / or resource / resource set information.

[0317] (2) The measurement related configuration may include report related configuration. For example, the report related configuration may include at least one of the following information.

[0318] 1) report type (periodic or event-triggered)

[0319] 2) report condition. e.g., A1-A6 handover event

[0320] 3) report periodicity

[0321] 4) report amount

[0322] (3) The measurement related configuration may include SSB and / or radio resource with purpose of radio link monitoring, e.g., Radio Link Failure and Beam failure. For example, the radio resource with purpose of radio link monitoring may include at least one of SSB and / or CSI-RS.

[0323] (4) The measurement related configuration may include SSB and / or radio resource with purpose of channel measurement, e.g., CSI-RS report with PMI / RI / CQI, L1-RSRP, etc. For example, the radio resource with purpose of channel measurement may include at least one of SSB and / or CSI-RS.

[0324] (5) The measurement related configuration may be associated with AI / ML functionality and / or AI / ML model. Each measurement related configuration or a set of measurement related configuration may be mapped to AI / ML functionality and / or AI / ML model.

[0325] 1) It can be explicitly configured with a specific AI / ML functionality and / or AI / ML model.

[0326] 2) It can be implicitly configured with an ID, e.g., associated ID.

[0327] (6) The measurement related configuration may be associated with a specific state of network or UE, e.g., NW / UE energy saving state.

[0328] Step S1010: The network releases the connection with an indication to maintain the current measurement configuration.

[0329] In this step, the network may release the connection with an indication (i) to maintain the current measurement related configuration configured in connected state and / or (ii) to maintain a specific AI / ML functionality and / or AI / ML model.

[0330] For example, the indication may link to a specific ID related to the specific AI / ML functionality and / or AI / ML model.

[0331] For example, the indication may link to an associated ID.

[0332] For example, the indication may link to a specific measurement ID or measurement object.

[0333] For example, the indication may link a specific state, e.g., network / UE energy saving state.

[0334] For example, the indication may include a valid time window.

[0335] (1) Valid time window may consist of starting time and / or end time, or a specific time interval.

[0336] (2) One or more Valid time window may be configured.

[0337] 1) Valid time window can be associated with a specific functionality / model or a set of specific functionalities / models

[0338] 2) Valid time window can be associated with an associated ID or a set of associated IDs

[0339] 3) Valid time window can be associated with measurement id or measurement object

[0340] 4) Valid time window can be associated with a specific state

[0341] Step S1020: The UE utilizes the measurement configuration to perform cell (re)selection.

[0342] (1) The UE may maintain the AI / ML functionality and / or AI / ML model associated with the indication received in step S1010.

[0343] 1) Maintaining may not mean that the UE operates the AI / ML related operation in RRC idle / inactive state, i.e., the UE may not perform AI / ML operation.

[0344] 2) The UE may maintain the configuration related to AI / ML functionality and / or AI / ML model, i.e., not remove / release the configuration.

[0345] (2) The UE may maintain the measurement configuration associated with the indication received in step S1010.

[0346] (3) The UE may utilize the measurement configuration to perform cell (re)selection.

[0347] Hereinafter, various implementations of the present disclosure related to performing cell (re)selection based on the measurement configuration are described in below.

[0348] (1)Implementation 1

[0349] According to Implementation 1 of the present disclosure, the UE may not perform cell (re)selection based on a common system information. The UE may measure frequencies based on measurement configuration.

[0350] 1)Implementation 1-1

[0351] The UE may measure frequencies / cells based on measurement object and report condition. If the measurement results of a cell satisfy the report condition, the UE may perform cell (re)selection to the cell.

[0352] 2)Implementation 1-2

[0353] The UE may measure frequencies / cells based on measurement object. If the measurement results of a cell satisfy the cell reselection criteria, the UE may perform cell (re)selection.

[0354] (2)Implementation 2

[0355] According to Implementation 2 of the present disclosure, the UE may perform cell(re)selection based on a common system information and measurement configuration.

[0356] 1)Implementation 2-1

[0357] The UE may re-order cell priorities based on the measurement configuration.

[0358] For example, if a frequency is included in measurement object in measurement configuration, that frequency takes priority over other frequencies that are not configured in the measurement configuration.

[0359] 2)Implementation 2-2

[0360] The UE may perform cell (re)selection based on the common system information. Separately, the UE may evaluate measurement results based on the measurement configuration.

[0361] For example, for a cell, if cell reselection criteria based on system information are satisfied or report conditions based on measurement configuration are satisfied, the UE may perform cell (re)selection to the cell.

[0362] The UE may perform cell reselection based on measurement configuration optionally. If one or more of following is satisfied, the UE may perform cell reselection based on the common system information.

[0363] When there is no suitable cell for cell reselection, the UE may stop the cell reselection based on the measurement configuration; and / or

[0364] The UE may apply the measurement configuration during the valid time window, if configured

[0365] -When the valid time is expired, the UE may stop cell reselection based on measurement configuration

[0366] -When the valid time is expired, the UE may perform cell reselection based on broadcast information

[0367] -When the valid time is expired, the UE may deactivate the AI / ML functionality and / or AI / ML model. The UE may remove / release the configuration of corresponding AI / ML functionality and / or AI / ML model.

[0368] If the UE performs reselection to a cell, the UE may maintain the (i) measurement configuration and / or (ii) AI / ML functionality and / or AI / ML model related configuration if the valid time is not expired, i.e. the timer for valid time is running after UE performs mobility.

[0369] -(i) The operation based on maintained configuration can be applied only if the settings received from the new cell include the frequency for which priority is to be applied. That is, priority may be applied only among frequencies within new broadcast information received from a new cell.; or

[0370] -(ii) The UE may apply the previous configuration on top of the new cell's settings. In other words, the operation based on previous configuration can be applied even if the settings received from the new cell do not include the measurement object(frequency) for which priority is to be applied.

[0371] Alternatively, the UE may remove / release (i) measurement related configuration and / or (ii) AI / ML functionality and / or AI / ML model related configuration upon performing mobility.

[0372] If the UE re-transits to RRC connected state within the valid time, UE may expire / stop the valid time and maintain / apply (i) measurement related configuration and / or (ii) AI / ML functionality and / or AI / ML model related configuration. The UE may re-perform AI / ML functionality and / or AI / ML model related operation if that operation has been stopped / paused in RRC idle / inactive state.

[0373] For example, according to the Implementation1-2 / 2-1 of the present disclosure described above, reselection priorities handling may be as follows.

[0374] Absolute priorities of different NR frequencies or inter-RAT frequencies may be provided to the UE in the system information, in the RRCRelease message, or by inheriting from another RAT at inter-RAT cell (re)selection. In the case of system information, an NR frequency or inter-RAT frequency may be listed without providing a priority (i.e. the field cellReselectionPriority is absent for that frequency). If any fields with cellReselectionPriority or nsag-CellReselectionPriority are provided in dedicated signalling, the UE shall ignore any fields with cellReselectionPriority and nsag-CellReselectionPriority provided in system information.

[0375] When UE is in camped normally state, if it supports slice-based cell reselection and has received the network slice(s) and NSAG information from NAS to be used for cell reselection, UE shall derive reselection priorities according to clause 5.2.4.11.

[0376] NOTE 00: UE derives reselection priorities according to clause 5.2.4.11 also in case SIB16 (see TS 38.331 [3]) is not broadcast in the camped cell.

[0377] If UE is in camped on any cell state, UE shall only apply the priorities provided by system information from current cell, and the UE preserves priorities provided by dedicated signalling and deprioritisationReq received in RRCRelease unless specified otherwise. If UE is configured with maintainMeasConfig received in RRCRelease, the UE may consider the frequency providing measurement configuration to be the highest priority. When the UE in camped normally state, has only dedicated priorities other than for the current frequency, the UE shall consider the current frequency to be the lowest priority frequency (i.e. lower than any of the network configured values). When the HSDN capable UE is in High-mobility state, the UE shall always consider the HSDN cells to be the highest priority (i.e., higher than any other network configured priorities). When the HSDN capable UE is not in High-mobility state, the UE shall always consider HSDN cells to be the lowest priority (i.e., lower than any other network configured priorities). If the UE is configured to perform both NR sidelink communication and V2X sidelink communication, the UE may consider the frequency providing both NR sidelink communication configuration and V2X sidelink communication configuration to be the highest priority. If the UE is configured to perform NR sidelink communication and not perform V2X communication, the UE may consider the frequency providing NR sidelink communication configuration to be the highest priority. If the UE is configured to perform V2X sidelink communication and not perform NR sidelink communication, the UE may consider the frequency providing V2X sidelink communication configuration to be the highest priority. If the UE is configured to perform ranging / sidelink positioning, the UE may consider the frequency providing ranging / sidelink positioning configuration to be the highest priority.

[0378] For example, according to the Implementation1-1 of the present disclosure described above, measurement rules for cell re-selection may be as follows.

[0379] Following rules are used by the UE to limit needed measurements:

[0380] -If UE has been configured with maintainMeasConfig received in RRCRelease, the UE may perform measurement of intra-frequency cells or inter-frequency cells based on measurement configuration according to TS 38.331.

[0381] -Else,

[0382] -If the serving cell fulfils Srxlev > SIntraSearchP and Squal > SIntraSearchQ:

[0383] -If distanceThresh and referenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN quasi-Earth-fixed system and has obtained its location information:

[0384] -If the distance between UE and the serving cell reference location referenceLocation is shorter than distanceThresh, the UE may not perform intra-frequency measurements;

[0385] -Else, the UE shall perform intra-frequency measurements;

[0386] -else if distanceThresh and movingReferenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN Earth-moving system and has obtained its location information:

[0387] -if the distance between UE's location and the serving cell reference location determined based on movingReferenceLocation is shorter than distanceThresh, the UE may not perform intra-frequency measurements;

[0388] -else, the UE shall perform intra-frequency measurements;

[0389] -Else, the UE may not perform intra-frequency measurements;

[0390] -Else, the UE shall perform intra-frequency measurements.

[0391] -The UE shall apply the following rules for NR inter-frequencies and inter-RAT frequencies which are indicated in system information and for which the UE has priority provided as defined in 5.2.4.1:

[0392] -For a NR inter-frequency or inter-RAT frequency with a reselection priority higher than the reselection priority of the current NR frequency, the UE shall perform measurements of higher priority NR inter-frequency or inter-RAT frequencies according to TS 38.133 [8].

[0393] -For a NR inter-frequency with an equal or lower reselection priority than the reselection priority of the current NR frequency and for inter-RAT frequency with lower reselection priority than the reselection priority of the current NR frequency:

[0394] -If the serving cell fulfils Srxlev > SnonIntraSearchP and Squal > SnonIntraSearchQ:

[0395] -If distanceThresh and referenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN quasi-Earth-fixed system and has obtained its UE location information:

[0396] -If the distance between UE and the serving cell reference location referenceLocation is shorter than distanceThresh, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0397] -Else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8];

[0398] -else if distanceThresh and movingReferenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN Earth-moving system and has obtained its location information:

[0399] -if the distance between UE's location and the serving cell reference location determined based on movingReferenceLocation is shorter than distanceThresh, the UE may not perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0400] - else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8];

[0401] - Else, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0402] - Else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8].

[0403] - If the UE supports relaxed measurement and relaxedMeasurement is present in SIB2, the UE may further relax the needed measurements, as specified in clause 5.2.4.9.

[0404] - For UE camping on NTN cell, if the UE supports skipping TN measurement, and the UE has obtained its location information, and if coverageAreaInfoList and tn-AreaIdList are broadcast in system information, the UE may not perform measurements of a TN frequency when UE is not in the coverage of that frequency provided via tn-AreaIdList, regardless of the frequency priority.

[0405] For example, according to the Implementation2-2 of the present disclosure described above, measurement rules for cell re-selection may be as follows.

[0406] Following rules are used by the UE to limit needed measurements:

[0407] -If the serving cell fulfils Srxlev > SIntraSearchP and Squal > SIntraSearchQ:

[0408] -If distanceThresh and referenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN quasi-Earth-fixed system and has obtained its location information:

[0409] -If the distance between UE and the serving cell reference location referenceLocation is shorter than distanceThresh, the UE may not perform intra-frequency measurements;

[0410] -Else, the UE shall perform intra-frequency measurements;

[0411] -else if distanceThresh and movingReferenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN Earth-moving system and has obtained its location information:

[0412] -if the distance between UE's location and the serving cell reference location determined based on movingReferenceLocation is shorter than distanceThresh, the UE may not perform intra-frequency measurements;

[0413] -else, the UE shall perform intra-frequency measurements;

[0414] -Else, the UE may not perform intra-frequency measurements;

[0415] -Else, the UE shall perform intra-frequency measurements.

[0416] -The UE shall apply the following rules for NR inter-frequencies and inter-RAT frequencies which are indicated in system information and for which the UE has priority provided as defined in 5.2.4.1:

[0417] -For a NR inter-frequency or inter-RAT frequency with a reselection priority higher than the reselection priority of the current NR frequency, the UE shall perform measurements of higher priority NR inter-frequency or inter-RAT frequencies according to TS 38.133 [8].

[0418] -For a NR inter-frequency with an equal or lower reselection priority than the reselection priority of the current NR frequency and for inter-RAT frequency with lower reselection priority than the reselection priority of the current NR frequency:

[0419] -If the serving cell fulfils Srxlev > SnonIntraSearchP and Squal > SnonIntraSearchQ:

[0420] -If distanceThresh and referenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN quasi-Earth-fixed system and has obtained its UE location information:

[0421] -If the distance between UE and the serving cell reference location referenceLocation is shorter than distanceThresh, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0422] -Else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8];

[0423] -else if distanceThresh and movingReferenceLocation are broadcasted in SIB19, and if UE supports location-based measurement initiation for NTN Earth-moving system and has obtained its location information:

[0424] -if the distance between UE's location and the serving cell reference location determined based on movingReferenceLocation is shorter than distanceThresh, the UE may not perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0425] -else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8];

[0426] -Else, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority;

[0427] -Else, the UE shall perform measurements of NR inter-frequency cells of equal or lower priority, or inter-RAT frequency cells of lower priority according to TS 38.133 [8].

[0428] -If the UE supports relaxed measurement and relaxedMeasurement is present in SIB2, the UE may further relax the needed measurements, as specified in clause 5.2.4.9.

[0429] -For UE camping on NTN cell, if the UE supports skipping TN measurement, and the UE has obtained its location information, and if coverageAreaInfoList and tn-AreaIdList are broadcast in system information, the UE may not perform measurements of a TN frequency when UE is not in the coverage of that frequency provided via tn-AreaIdList, regardless of the frequency priority.

[0430] -If UE has been configured with maintainMeasConfig received in RRCRelease, the UE may perform measurement of intra-frequency cells or inter-frequency cells based on measurement configuration according to TS 38.331.

[0431] The present disclosure may have various advantageous effects.

[0432] For example, by maintaining the same measurement settings, the UE can ensure a more seamless transition between connected and idle / inactive states, leading to quicker and more reliable handovers and cell reselections. The UE can also quickly reselect the best cell based on the most recent and consistent measurement data, reducing the time it takes to reconnect when moving back to the connected state.

[0433] For example, during transitioning RRC state, the AI / ML functionality / model can be effectively activated / deactivated without additional signal.

[0434] Advantageous effects which can be obtained through specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be a variety of technical effects that a person having ordinary skill in the related art can understand and / or derive from the present disclosure. Accordingly, the specific effects of the present disclosure are not limited to those explicitly described herein, but may include various effects that may be understood or derived from the technical features of the present disclosure.

[0435] Claims in the present disclosure can be combined in a various way. For instance, technical features in method claims of the present disclosure can be combined to be implemented or performed in an apparatus, and technical features in apparatus claims can be combined to be implemented or performed in a method. Further, technical features in method claim(s) and apparatus claim(s) can be combined to be implemented or performed in an apparatus. Further, technical features in method claim(s) and apparatus claim(s) can be combined to be implemented or performed in a method. Other implementations are within the scope of the following claims.

Claims

1.A method comprising:receiving, by a wireless device, a measurement configuration from a network;receiving, by the wireless device, a release message from the network, wherein the release message includes information informing that the measurement configuration is maintained; andperforming, by the wireless device, a cell reselection based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.2.The method of claim 1, wherein the receiving the measurement configuration is performed while in a radio resource control (RRC) connected state.3.The method of claim 2, wherein the information informs that the measurement configuration configured in the RRC connected state is maintained in an RRC idle state and / or RRC inactive state.4.The method of claim 3, wherein that the measurement configuration is maintained comprises that the measurement configuration is not removed and / or released in the RRC idle state and / or the RRC inactive state.5.The method of claim 1,wherein the measurement configuration is associated with a functionality and / or a model.6.The method of claim 5, wherein the functionality and / or the model is related to an Artificial Intelligence (AI) / Machine Learning (ML) operation.7.The method of claim 5, wherein the measurement configuration is linked to a specific ID related to the functionality and / or the model.8.The method of claim 7, wherein the specific ID is an associated ID related to association between the measurement configuration and / the functionality and / or the model.9.The method of claim 5, wherein the information further informs that the functionality and / or the model is maintained.10.The method of claim 1, wherein the wireless device transitions from the RRC connected state to an idle / inactive state after receiving the release message.11.The method of claim 1, wherein performing of the cell reselection based on the measurement configuration comprises:deriving, by the wireless device, measurement results based on the measurement configuration; andperforming, by the wireless device, the cell reselection based on the measurement results.12.The method of claim 1, wherein performing of the cell reselection based on the measurement configuration comprises:deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration; andperforming, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a report condition included in the measurement configuration.13.The method of claim 1, wherein performing of the cell reselection based on the measurement configuration comprises:deriving, by the wireless device, measurement results of frequencies and / or cells related to a measurement object included in the measurement configuration; andperforming, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria.14.The method of claim 1, wherein performing of the cell reselection based on the measurement configuration comprises:deriving, by the wireless device, measurement results of frequencies and / or cells indicated in system information; andre-ordering, by the wireless device, cell priorities of the frequencies and / or cells based on the measurement configuration; andperforming, by the wireless device, the cell reselection to a cell based on the re-ordered cell priorities.15.The method of claim 14, wherein a frequency and / or cell included in the measurement configuration has a higher priority than a frequency and / or a cell included in the system information.16.The method of claim 1, wherein performing of the cell reselection based on the measurement configuration comprises:deriving, by the wireless device, measurement results of frequencies and / or cells included in i) system information and / or ii) the measurement configuration; andperforming, by the wireless device, the cell reselection to a cell for which the measurement results satisfy a cell reselection criteria and / or a report condition included in the measurement configuration.17.The method of claim 1, wherein the method further comprises:maintaining, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration while a valid time is not expired, after performing the cell reselection.18.The method of claim 17, wherein the method further comprises:removing and / or releasing, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration, upon expiry of the valid time.19.The method of claim 1, wherein the method further comprises:removing and / or releasing, by the wireless device, the (i) measurement configuration and / or (ii) functionality and / or model related configuration after performing the cell reselection.20.The method of any claims 1 to 19, wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.21.A wireless device comprising:at least one transceiver;at least one processor; andat least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform the method of any claims 1 to 21.22.A processing apparatus, adapted to control a wireless device, comprising:at least one processor; andat least one memory operably connectable to the at least one processor,wherein the at least one processor is adapted to perform the method of any claims 1 to 21.23.A non-transitory Computer Readable Medium (CRM) storing instructions that, based on being executed by at least one processor, perform the method of any claims 1 to 21.24.A method comprising:transmitting, by a base station, a measurement configuration to a wireless device;transmitting, by the base station, a release message to the wireless device, wherein the release message includes information informing that the measurement configuration is maintained,wherein a cell reselection is performed based on the measurement configuration, which is maintained based on the information informing that the measurement configuration is maintained.25.A base station comprising:at least one transceiver;at least one processor; andat least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform the method of claim 24.

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