Method and apparatus for autonomous change of dormant bandwidth part in wireless communication system

Abstract

A method and apparatus for autonomous change of dormant bandwidth part in a wireless communication system are provided. A wireless device configures a cell group including a specific cell on which a PUCCH is configured. The wireless device activates a dormant BWP of the specific cell as an active BWP of the specific cell, wherein no PDCCH is configured on the dormant BWP. The wireless device switches the active BWP of the specific cell from the dormant BWP to another BWP when a scheduling request procedure is triggered, wherein at least one PDCCH is configured on the another BWP.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for autonomous changing of dormant bandwidth portions in a wireless communication system. Background Art

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

[0003] The International Telecommunication Union (ITU) and 3GPP have begun developing requirements and specifications for New Radio (NR) systems. 3GPP must identify and develop the technical components necessary for the successful standardization of new RATs that will meet both immediate market needs and the longer-term requirements outlined by the ITU Radiocommunication Sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process. Furthermore, NR should be able to use any spectrum band available for wireless communications in the more distant future, at least up to 100 GHz.

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

[0005] NR is a technology that operates over a very wide frequency band compared to LTE. To support flexible broadband operation, NR has the following design principles that differ from LTE in terms of broadband support.

[0006] - The network and user equipment (UE) may have different capabilities in supporting bandwidth.

[0007] - The downlink and uplink bandwidth capabilities supported by the UE may be different.

[0008] -The bandwidth capabilities supported by each UE can be different, so that UEs supporting different bandwidths can coexist in one network band.

[0009] - In order to reduce the power consumption of UE, different bandwidths can be configured for UE according to the service load status of UE, etc.

[0010] To meet the above design principles, in addition to the existing LTE carrier aggregation (CA), NR introduces the concept of bandwidth part (BWP). Summary of the Invention

[0011] Technical Problem

[0012] A dormant SCell can be supported in NR. Similarly to SCell, a dormant bandwidth part can be supported in NR. A dormant bandwidth part can be proposed to reduce UE battery consumption. For example, a dormant bandwidth part can not support PDCCH. That is, when a dormant bandwidth part is an active bandwidth part, a wireless device can not monitor PDCCH.

[0013] If a dormant bandwidth part is activated for all cells belonging to a cell group (e.g., a master cell group (MCG) or a secondary cell group (SCG)), a wireless device can not perform PDCCH monitoring for the cell group. Then, the wireless device can minimize power consumption required for PDCCH monitoring.

[0014] Although a cell group is in a dormant state (e.g., a dormant bandwidth part is activated for all cells belonging to the cell group), it can be necessary to trigger a scheduling request for the cell group so that necessary uplink data (e.g., an RRC message) can be transmitted.

[0015] In this case, even if a scheduling request is triggered for the cell group, since the wireless device does not monitor PDCCH for all cells belonging to the cell group, the wireless device cannot acquire an uplink grant to transmit uplink data.

[0016] Therefore, research into autonomous change of a dormant bandwidth part in a wireless communication system is needed.

[0017] Solution to Problem

[0018] In an aspect, a method performed by a wireless device in a wireless communication system is provided. The wireless device configures a cell group including a specific cell on which a physical uplink control channel (PUCCH) is configured. The wireless device activates a dormant bandwidth part (BWP) of the specific cell as an active BWP of the specific cell, wherein no physical downlink control channel (PDCCH) is configured on the dormant BWP. Upon triggering a scheduling request procedure, the wireless device switches the active BWP of the specific cell from the dormant BWP to another BWP, wherein at least one PDCCH is configured on the other BWP.

[0019] In another aspect, a device for implementing the above-described method is provided.

[0020] Advantageous Effects of Invention

[0021] The present disclosure can have various advantageous effects.

[0022] According to some embodiments of the present disclosure, a wireless device may efficiently perform autonomous switching of a dormant bandwidth portion.

[0023] For example, when all cells belonging to a cell group are in a dormant state for power saving, a wireless device may transmit necessary uplink (UL) data (eg, a UL RRC message) by autonomously changing an active bandwidth portion.

[0024] According to some embodiments of the present disclosure, a wireless communication system may efficiently provide a solution for using a dormant bandwidth portion by applying autonomous changes of the dormant bandwidth portion.

[0025] For example, even if all cells belonging to a cell group are in a dormant state, the network can receive necessary uplink (UL) data (eg, UL RRC message) by applying an autonomous bandwidth portion change of the dormant bandwidth portion.

[0026] The advantageous effects that can be obtained by the specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be various technical effects that a person of ordinary skill in the relevant art can understand and / or deduce based on the present disclosure. Therefore, the specific effects of the present disclosure are not limited to those explicitly described herein, but can include various effects that can be understood or derived from the technical features of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0028] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0029] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0030] Figure 4 Another example of a wireless device to which implementations of the present disclosure are applied is shown.

[0031] Figure 5 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0032] Figure 6 and Figure 7 An example of a protocol stack in a 3GPP-based wireless communication system to which implementations of the present disclosure are applied is shown.

[0033] Figure 8 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0034] Figure 9An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0035] Figure 10 An example of a bandwidth part (BWP) configuration to which an implementation of the present disclosure is applied is shown.

[0036] Figure 11 Examples of continuous BWP and non-continuous BWP to which implementations of the present disclosure are applied are shown.

[0037] Figure 12 An example of multiple BWPs to which implementations of the present disclosure are applied is shown.

[0038] Figure 13 An example of a method for autonomous change of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure is shown.

[0039] Figure 14 An example of a method for autonomous change of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0040] The following techniques, devices, and systems can be applied to various wireless multiple access systems. Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems. CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE adopts OFDMA in DL and SC-FDMA in UL. LTE-Advanced (LTE-A) is an evolved version of 3GPP LTE.

[0041] For ease of description, the implementation of the present disclosure will be primarily described with respect to a 3GPP-based wireless communication system. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP-based wireless communication system, aspects of the present disclosure that are not limited to 3GPP-based wireless communication systems are applicable to other mobile communication systems.

[0042] For terms and techniques not specifically described in the terms and techniques adopted in the present disclosure, reference may be made to wireless communication standard documents issued prior to the present disclosure.

[0043] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B, or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0044] In the present disclosure, a slash ( / ) or a comma (,) may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0045] In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, the expression “at least one of A or B” or “at least one of A and / or B” in the present disclosure may be interpreted as being the same as “at least one of A and B”.

[0046] 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.”

[0047] In addition, the brackets used in the present disclosure may mean "for example". In detail, when "control information (PDCCH)" is shown, "PDCCH" may be proposed as an example of "control information". In other words, in the present disclosure, "control information" is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when "control information (i.e., PDCCH)" is shown, "PDCCH" may be proposed as an example of "control information".

[0048] The technical features described separately in one figure in this disclosure can be implemented separately or simultaneously.

[0049] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods and / or operational flowcharts of the present disclosure disclosed herein may be applied to various fields requiring wireless communication and / or connectivity between devices (e.g., 5G).

[0050] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings. Unless otherwise specified, the same reference numerals in the following drawings and / or descriptions may refer to the same and / or corresponding hardware blocks, software blocks and / or functional blocks.

[0051] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0052] exist Figure 1 The 5G usage scenarios shown in the present disclosure are only exemplary, and the technical features of the present disclosure can be applied to Figure 1 Other 5G usage scenarios shown in .

[0053] The three main demand categories for 5G include: (1) enhanced mobile broadband (eMBB) category, (2) massive machine type communication (mMTC) category, and (3) ultra-reliable and low-latency communication (URLLC) category.

[0054] Some use cases may require multiple categories for optimization, while others may focus on just one key performance indicator (KPI). 5G supports such a variety of use cases using a flexible and reliable approach.

[0055] eMBB goes far beyond basic mobile internet access and covers rich two-way work and media and entertainment applications in the cloud and augmented reality. Data is one of the core driving forces of 5G, and for the first time in the 5G era, dedicated voice services may not be provided. In 5G, voice is expected to be simply processed as an application using the data connection provided by the communication system. The main reasons for the increase in service capacity are the increase in content size and the increase in the number of applications requiring high data transmission rates. As more and more devices connect to the internet, streaming services (audio and video), conversational video, and mobile internet access will become more widely used. Many of these applications require always-on connectivity to push real-time information and alerts to users. Cloud storage and applications are rapidly increasing in mobile communication platforms and can be applied to both work and entertainment. Cloud storage is a special use case that is accelerating the growth of uplink data transmission rates. 5G is also used for remote work in the cloud. When using tactile interfaces, 5G requires much lower end-to-end latency to maintain a good user experience. Entertainment, such as cloud gaming and video streaming, is another core element that is increasing the demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including in highly mobile environments such as trains, cars, and airplanes. Another use case is augmented reality for entertainment and information search. In this case, augmented reality requires very low latency and instantaneous data capacity.

[0056] Furthermore, one of the most anticipated 5G use cases involves the ability to seamlessly connect embedded sensors across all fields, known as mMTC. It is expected that the number of potential Internet of Things (IoT) devices will reach 204 billion by 2020. Industrial IoT is one of the key categories that will play a major role in enabling smart cities, asset tracking, smart utilities, agriculture, and security infrastructure through 5G.

[0057] URLLC, which includes remote control and ultra-reliable / available low-latency links over the primary infrastructure, will transform new industrial services (such as autonomous vehicles). This level of reliability and latency is necessary to control smart grids, automate industry, enable robotics, and control and coordinate drones.

[0058] 5G is a means of providing streams estimated to be hundreds of megabits per second to gigabits per second, and can supplement fiber to the home (FTTH) and cable-based broadband (or DOCSIS). Such fast speeds are needed to deliver TV with a resolution of 4K or more (6K, 8K and more), as well as virtual reality and augmented reality. Virtual reality (VR) and augmented reality (AR) applications include almost immersive sports games. Specific applications may require special network configurations. For example, for VR games, game companies need to merge core servers into the network operator's edge network servers to minimize latency.

[0059] Automobiles, along with their numerous use cases for mobile communications, are expected to be a significant new driver for 5G. For example, passenger entertainment will require high simultaneous capacity and mobile broadband with high mobility. This is because future users will continue to expect high-quality connectivity, regardless of their location and speed. Another use case in the automotive sector is augmented reality (AR) dashboards. AR dashboards allow drivers to identify objects in the dark, in addition to those visible through the front window, and display distance to and movement of objects by overlaying information spoken to the driver. In the future, wireless modules will enable communication between vehicles, information exchange between vehicles and supporting infrastructure, and information exchange between vehicles and other connected devices (e.g., devices accompanying pedestrians). Safety systems will guide alternative routes, enabling drivers to drive more safely and thus reducing the risk of accidents. The next stage will be remotely controlled or autonomous vehicles. This requires extremely high reliability and very fast communication between autonomous vehicles and between vehicles and infrastructure. In the future, autonomous vehicles will perform all driving activities, and drivers will only focus on unusual traffic events that the vehicle cannot identify. The technical requirements for autonomous vehicles require ultra-low latency and ultra-high reliability, increasing traffic safety to a level that cannot be achieved by humans.

[0060] Smart cities and smart homes / buildings, often referred to as smart societies, will be embedded in high-density wireless sensor networks. Distributed networks of smart sensors will identify conditions for cost- and energy-efficient maintenance in cities or homes. Similar configurations can be implemented for corresponding homes. All temperature sensors, window and heating controls, burglar alarms, and household appliances will be wirelessly connected. Many of these sensors are typically low in terms of data transmission rate, power, and cost. However, certain types of devices may require real-time HD video for monitoring.

[0061] The consumption and distribution of energy, including heat and gas, is becoming increasingly distributed, necessitating the automated control of distribution sensor networks. Smart grids collect information and use digital information and communication technologies to connect sensors to each other, thereby acting upon this information. Because this information can include the behavior of both supply companies and consumers, smart grids can improve the distribution of fuels such as electricity through methods that enhance efficiency, reliability, economic viability, sustainable production, and automation. Smart grids can also be considered another sensor network with low latency.

[0062] Mission-critical applications (e.g., e-health) are one of the 5G use cases. The health sector includes many applications that can benefit from mobile communications. Communication systems can support telemedicine, which provides clinical treatment in remote locations. Telemedicine can help reduce the barriers of distance and improve access to medical services that are not continuously available in remote rural areas. Telemedicine is also used to perform important treatments and save lives in emergency situations. Wireless sensor networks based on mobile communications can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

[0063] Wireless and mobile communications are becoming increasingly important in industrial applications. Cabling is expensive to install and maintain. Therefore, the potential to replace cables with reconfigurable wireless links presents an attractive opportunity in many industrial sectors. However, to achieve this replacement, wireless connections must have similar latency, reliability, and capacity to cables, and their management must be simplified. When it comes to 5G connectivity, low latency and a very low probability of error are new requirements.

[0064] Logistics and freight tracking are important use cases for mobile communications, allowing inventory and packages to be tracked anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates but require location information with wide range and reliability.

[0065] Reference Figure 1 , the communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Figure 1 A 5G network is illustrated as an example of the network of the communication system 1 , but implementations of the present disclosure are not limited to the 5G system and may be applied to future communication systems other than the 5G system.

[0066] BS 200 and network 300 may be implemented as wireless devices, and certain wireless devices may operate as BSs / network nodes relative to other wireless devices.

[0067] Wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or LTE) and may be referred to as communication / wireless / 5G devices. Wireless devices 100a to 100f may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of performing communication between vehicles. A vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include AR / VR / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices can include smartphones, smart tablets, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., laptops). Home appliances can include TVs, refrigerators, and washing machines. IoT devices can include sensors and smart meters.

[0068] In the present disclosure, wireless devices 100a to 100f may be referred to as user equipment (UE). For example, UE may include 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 tablet-shaped personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle with an autonomous driving function, a connected car, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a Fintech device (or a financial device), a security device, a weather / environmental device, a device related to 5G services, or a device related to the fourth industrial evolution field.

[0069] A UAV may be, for example, an aerial vehicle that is piloted by wireless control signals without a human on board.

[0070] VR devices may include, for example, devices for realizing objects or backgrounds in a virtual world. AR devices may include, for example, devices that realize this by connecting objects or backgrounds in a virtual world to objects or backgrounds in the real world. MR devices may include, for example, devices that realize this by merging objects or backgrounds in a virtual world into objects or backgrounds in the real world. Hologram devices may include, for example, devices for realizing 360-degree stereoscopic images by recording and reproducing stereoscopic information, which uses the interference phenomenon of light generated when two lasers meet, known as holographic imaging.

[0071] Public safety devices may include, for example, image relay devices or image devices wearable on a user's body.

[0072] MTC devices and IoT devices may be devices that do not require direct human intervention or manipulation, for example, and may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0073] A medical device may be, for example, a device used for the purpose of diagnosing, treating, alleviating, curing, or preventing a disease. For example, a medical device may be a device used for the purpose of diagnosing, treating, alleviating, or correcting an injury or damage. For example, a medical device may be a device used for the purpose of inspecting, replacing, or modifying a structure or function. For example, a medical device may be a device used for the purpose of regulating pregnancy. For example, a medical device may include a device for treatment, a device for operation, a device for (in vitro) diagnosis, a hearing aid, or a device for surgery.

[0074] The safety device may be, for example, a device installed to prevent possible danger and maintain safety. For example, the safety device may be a camera, a closed-circuit TV (CCTV), a recorder, or a black box.

[0075] Fintech devices may be devices that can provide financial services such as mobile payments, for example. For example, Fintech devices may include payment devices or point-of-sale (POS) systems.

[0076] Weather / environmental devices may include, for example, devices for monitoring or predicting weather / environmental conditions.

[0077] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using 3G networks, 4G (e.g., LTE) networks, 5G (e.g., NR) networks, and beyond 5G networks. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through BS 200 / network 300. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0078] Wireless communication / connection 150a, 150b, and 150c can be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS 200 and / or between BSs 200. Herein, the wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication (or device-to-device (D2D) communication) 150b, inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)), etc. Wireless devices 100a to 100f and BS 200 / wireless devices 100a to 100f can transmit / receive radio signals to / from each other through wireless communication / connection 150a, 150b, and 150c. For example, wireless communication / connection 150a, 150b, and 150c can transmit / receive signals through various physical channels. To this end, at least a part of various configuration information configuration procedures, various signal processing procedures (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation procedures for transmitting / receiving radio signals can be performed based on various proposals of the disclosure.

[0079] Here, the radio communication technology implemented in the wireless device in the disclosure can include a narrowband Internet of Things (NB-IoT) technology for low-power communication as well as LTE, NR, and 6G. For example, the NB-IoT technology can be an example of a low-power wide-area network (LPWAN) technology, can be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and can not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the disclosure can communicate based on an LTE-M technology. For example, the LTE-M technology can be an example of a LPWAN technology, and can be referred to as various names such as enhanced machine type communication (eMTC). For example, the LTE-M technology can be implemented in at least one of various specifications such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, and can not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the disclosure can include at least one of ZigBee, Bluetooth, and / or LPWAN considering low-power communication, and can not be limited to the above names. For example, the ZigBee technology can generate a personal area network (PAN) associated with small / low-power digital communication based on various specifications such as IEEE 802.15.4, and can be referred to as various names.

[0080] Figure 2An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0081] Reference Figure 2 , the first wireless device 100 and the second wireless device 200 can transmit / receive radio signals to / from an external device through various RATs (eg, LTE and NR). Figure 2 In the example, {first wireless device 100 and second wireless device 200} may correspond to the attached Figure 1 At least one of {wireless devices 100a to 100f and BS200}, {wireless devices 100a to 100f and wireless devices 100a to 100f} and / or {BS200 and BS200}.

[0082] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may also include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in this disclosure. For example, the processor 102 may process information within the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including commands for executing part or all of the processes controlled by the processor 102 or for executing the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in this disclosure. In this document, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each of the transceivers 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this disclosure, the first wireless device 100 may represent a communication modem / circuit / chip.

[0083] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in this disclosure. For example, the processor 202 may process information within the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including commands for executing part or all of the processes controlled by the processor 202 or for executing the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts described in this disclosure. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each of the transceivers 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0084] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described more specifically. One or more protocol layers can be implemented by, but are not limited to, one or more processors 102 and 202. For example, the one or more processors 102 and 202 can implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). The one or more processors 102 and 202 can generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) 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 can generate 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 can generate signals (e.g., baseband signals) including 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, and provide the generated signals to the one or more transceivers 106 and 206. The one or more processors 102 and 202 can receive 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.

[0085] The one or more processors 102 and 202 can be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The one or more processors 102 and 202 can 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) can be included in the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure can be implemented using firmware or software, and the firmware or software can be configured to include modules, processes, or functions. The firmware or software configured to perform the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure can be included in the one or more processors 102 and 202, or stored in the one or more memories 104 and 204, so as to be driven by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in the present disclosure can be implemented using firmware or software in the form of codes, commands, and / or command sets.

[0086] The one or more memories 104 and 204 can be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104 and 204 can be configured by read-only memory (ROM), random access memory (RAM), electrically programmable read only memory (EPROM), flash memory, a hard disk drive, a register, a cache memory, a computer readable storage medium, and / or a combination thereof. The one or more memories 104 and 204 can be located inside and / or outside the one or more processors 102 and 202. The one or more memories 104 and 204 can be connected to the one or more processors 102 and 202 by various techniques such as wired or wireless connections.

[0087] One or more transceivers 106 and 206 can transmit user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in this disclosure to one or more other devices. One or more transceivers 106 and 206 can receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in this disclosure from one or more other devices. For example, one or more transceivers 106 and 206 can be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can receive user data, control information, or radio signals from one or more other devices.

[0088] One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and the one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure through the one or more antennas 108 and 208. In the present disclosure, the one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0089] One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals in order to process received user data, control information, radio signals / channels, etc. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed using one or more processors 102 and 202, from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, under the control of processors 102 and 202, transceivers 106 and 206 may up-convert an OFDM baseband signal to a carrier frequency using their (analog) oscillators and / or filters, and transmit the up-converted OFDM signal at the carrier frequency. Transceivers 106 and 206 may receive an OFDM signal at a carrier frequency and, under the control of processors 102 and 202, down-convert the OFDM signal to an OFDM baseband signal using their (analog) oscillators and / or filters.

[0090] In implementations of the present disclosure, a UE may operate as a transmitting device in the uplink (UL) and as a receiving device in the downlink (DL). In implementations of the present disclosure, a base station (BS) may operate as a receiving device in the UL and as a transmitting device in the DL. Hereinafter, for ease of description, it is primarily assumed that the first wireless device 100 acts as a UE and the second wireless device 200 acts as a base station (BS). For example, the processor 102 connected to, installed on, or activated in the first wireless device 100 may be configured to perform UE behavior according to implementations of the present disclosure, or to control the transceiver 106 to perform UE behavior according to implementations of the present disclosure. The processor 202 connected to, installed on, or activated in the second wireless device 200 may be configured to perform BS behavior according to implementations of the present disclosure, or to control the transceiver 206 to perform BS behavior according to implementations of the present disclosure.

[0091] In this disclosure, a BS is also referred to as a Node B (NB), an eNodeB (eNB), or a gNB.

[0092] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0093] The wireless device may be implemented in various forms depending on the use case / service (see Figure 1 ).

[0094] Reference Figure 3 , the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 2 One or more processors 102 and 202 and / or Figure 2 One or more memories 104 and 204. For example, the transceiver 114 may include Figure 2 One or more transceivers 106 and 206 and / or Figure 2The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of each of the wireless devices 100 and 200. For example, the control unit 120 can control the electrical / mechanical operation of each of the wireless devices 100 and 200 based on the program / code / command / information stored in the memory unit 130. The control unit 120 can transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface via the communication unit 110, or store information received from the outside (e.g., other communication devices) through a wireless / wired interface in the memory unit 130 via the communication unit 110.

[0095] The additional component 140 may be configured differently depending on the type of the wireless devices 100 and 200. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit (e.g., an audio I / O port, a video I / O port), a driving unit, and a computing unit. The wireless devices 100 and 200 may be configured in the form of, but not limited to, robots ( Figure 1 100a), vehicle ( Figure 1 100b-1 and 100b-2), XR devices ( Figure 1 100c), handheld device ( Figure 1 100d), household appliances ( Figure 1 100e), IoT devices ( Figure 1 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, Fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 1 400), BSS( Figure 1 The wireless devices 100 and 200 may be implemented in the form of a mobile or fixed location, depending on the use case / service.

[0096] exist Figure 3In the wireless devices 100 and 200, the various elements, components, units / parts, and / or modules in their entirety may be connected to each other via a wired interface, or at least a portion thereof may be wirelessly connected via the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected via a wired interface, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected via the communication unit 110. Each element, component, unit / part, and / or module within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a group of one or more processors. As an example, the control unit 120 may be configured by a group of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory unit 130 may be configured by RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0097] Figure 4 Another example of a wireless device to which implementations of the present disclosure are applied is shown.

[0098] Reference Figure 4 , the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 may be configured by various elements, components, units / portions and / or modules.

[0099] First wireless device 100 may include at least one transceiver, such as transceiver 106, and at least one processing chip, such as processing chip 101. Processing chip 101 may include at least one processor, such as processor 102, and at least one memory, such as memory 104. Memory 104 may be operably connected to processor 102. Memory 104 may store various types of information and / or instructions. Memory 104 may store software code 105 that, when executed by processor 102, implements instructions for performing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in this disclosure. For example, software code 105 may implement instructions for performing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in this disclosure, when executed by processor 102. For example, software code 105 may control processor 102 to execute one or more protocols. For example, software code 105 may control processor 102 to execute one or more layers of a radio interface protocol.

[0100] The second wireless device 200 may include at least one transceiver, such as transceiver 206, and at least one processing chip, such as processing chip 201. Processing chip 201 may include at least one processor, such as processor 202, and at least one memory, such as memory 204. Memory 204 may be operably connected to processor 202. Memory 204 may store various types of information and / or instructions. Memory 204 may store software code 205 that, when executed by processor 202, implements instructions for performing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in this disclosure. For example, software code 205 may implement instructions for performing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in this disclosure, when executed by processor 202. For example, software code 205 may control processor 202 to execute one or more protocols. For example, software code 205 may control processor 202 to execute one or more layers of a wireless interface protocol.

[0101] Figure 5 An example of a UE to which an implementation of the present disclosure is applied is shown.

[0102] Reference Figure 5 , UE 100 may correspond to the attached Figure 2 The first wireless device 100 and / or Figure 4 The first wireless device 100 is configured to:

[0103] UE 100 includes a processor 102 , memory 104 , a transceiver 106 , one or more antennas 108 , a power management module 110 , a battery 1112 , a display 114 , a keypad 116 , a subscriber identity module (SIM) card 118 , a speaker 120 , and a microphone 122 .

[0104] The processor 102 may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure. The processor 102 may be configured to control one or more other components of the UE 100 to implement the descriptions, functions, processes, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure. The layers of the radio interface protocol may be implemented in the processor 102. The processor 102 may include an ASIC, other chipsets, logic circuits, and / or data processing devices. The processor 102 may be an application processor. The processor 102 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (modulator and demodulator). Examples of the processor 102 may be found at SNAPDRAGON MANUFACTURED TM series processors, Manufactured by EXYNOSTM series of processors, manufactured by Intel®, manufactured by Intel®, TM series of processors, manufactured by Intel®, TM series of processors or a corresponding next generation processor.

[0105] The memory 104 is operatively coupled with the processor 102 and stores various information to operate the processor 102. The memory 104 can include ROM, RAM, flash memory, a memory card, a storage medium and / or other storage devices. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the description, the function, the procedure, the suggestion, the method and / or the operational flow 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 in the processor 102 or external to the processor 102 in which case the memory 104 can be communicatively coupled to the processor 102 via various means as is known in the art.

[0106] The transceiver 106 is operatively coupled with the processor 102 and transmits and / or receives radio signals. The transceiver 106 includes a transmitter and a receiver. The transceiver 106 can include a baseband circuit for processing radio frequency signals. The transceiver 106 controls the one or more antennas 108 for transmitting and / or receiving radio signals.

[0107] The power management module 110 manages power of the processor 102 and / or the transceiver 106. The battery 112 supplies power to the power management module 110.

[0108] The display 114 outputs results processed by the processor 102. The keypad 116 receives inputs to be used by the processor 102. The keypad 116 can be displayed on the display 114.

[0109] The SIM card 118 is an integrated circuit 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 telecommunication devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards.

[0110] The speaker 120 outputs sound-related results processed by the processor 102. The microphone 122 receives sound-related inputs to be used by the processor 102.

[0111] Figure 6 and Figure 7 An example of a protocol stack in a 3GPP-based wireless communication system to which implementations of the present disclosure are applied is illustrated.

[0112] Specifically, Figure 6 illustrates an example of a radio interface user plane protocol stack between a UE and a BS, and Figure 7 An example of a radio interface control plane protocol stack between a UE and a BS is illustrated. The control plane refers to a path through which control messages for managing calls between the UE and the network are transmitted. The user plane refers to a path through which data generated in the application layer (for example, voice data or Internet packet data) is transmitted. Figure 6 , the user plane protocol stack can be divided into layer 1 (ie, PHY layer) and layer 2. Figure 7 , the control plane protocol stack can be divided into layer 1 (ie, PHY layer), layer 2, layer 3 (eg, RRC layer) and non-access stratum (NAS) layer. Layer 1, layer 2 and layer 3 are called access stratum (AS).

[0113] In 3GPP LTE systems, Layer 2 is divided into the following sublayers: MAC, RLC, and PDCP. In 3GPP NR systems, Layer 2 is divided into the following sublayers: MAC, RLC, PDCP, and SDAP. The PHY layer provides transport channels to the MAC sublayer, the MAC sublayer provides logical channels to the RLC sublayer, the RLC sublayer provides RLC channels to the PDCP sublayer, and the PDCP sublayer provides radio bearers to the SDAP sublayer. The SDAP sublayer provides Quality of Service (QoS) flows to the 5G core network.

[0114] In 3GPP NR systems, the main services and functions of the MAC sublayer include: mapping between logical channels and transport channels; multiplexing / demultiplexing MAC SDUs belonging to one or different logical channels onto / from transport blocks (TBs) 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 the case of carrier aggregation (CA); priority handling between UEs through dynamic scheduling; priority handling between logical channels of a UE through logical channel prioritization; and padding. A single MAC entity can support multiple parameter sets, transmission timings, and cells. Mapping restrictions in logical channel prioritization control which parameter set(s), cell, and transmission timing can be used by a logical channel.

[0115] The MAC offers different kinds of data transfer services. To accommodate the different kinds of data transfer services, multiple types of logical channels are defined, i.e. each logical channel supports the transfer of a certain type of information. Each logical channel type is defined by what type of information is transferred. The 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 the 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 the network and used by UEs that have not established an 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. 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.

[0116] The RLC sublayer supports three transmission modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). RLC configuration is per logical channel without dependency on numerologies and / or transmission durations. In 3GPP NR systems, 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 SDUs (AM and UM); duplicate detection (AM only); RLC SDU discard (AM and UM); RLC re-establishment; protocol error detection (AM).

[0117] 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); delivery of user data; reordering and duplicate detection; in-sequence delivery; PDCP PDU routing (in the 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; PDCP PDU duplication 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; delivery of control plane data; reordering and duplicate detection; in-sequence delivery; PDCP PDU duplication and duplicate discard indication to lower layers.

[0118] In 3GPP NR systems, the main services and functions of SDAP include: mapping between QoS flows and data radio bearers; marking QoS flow IDs (QFIs) in both DL and UL packets. A single protocol entity of SDAP is configured for each individual PDU session.

[0119] In the 3GPP NR system, the main services and functions of the RRC sublayer include: broadcast of system information related to AS and NAS; paging initiated by 5GC or NG-RAN; establishment, maintenance and release of RRC connections between UE and NG-RAN; security functions including key management; establishment, configuration, maintenance and release of signaling radio bearers (SRBs) and data radio bearers (DRBs); mobility functions (including handover and context transfer, UE cell selection and reselection and control of cell selection and reselection, and inter-RAT mobility); QoS management functions; UE measurement reporting and control of reporting; detection and recovery of radio link failures; and NAS message transmission from UE to NAS / from NAS to UE.

[0120] Figure 8 The frame structure in a 3GPP-based wireless communication system to which the implementation of the present disclosure is applied is shown.

[0121] Figure 8The frame structure shown in is merely exemplary, and the number of subframes, the number of time slots, and / or the number of symbols in a frame may vary. In a 3GPP-based wireless communication system, OFDM parameter sets (e.g., subcarrier spacing (SCS), transmission time interval (TTI) duration) may be configured differently between multiple cells aggregated for one UE. For example, if a UE is configured with different SCSs for cells aggregated for a cell, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) comprising the same number of symbols may be different among the aggregated cells. In this document, the symbols may include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbols).

[0122] Reference Figure 8 , downlink and uplink transmissions are organized into frames. Each frame has T f = 10ms duration. Each frame is divided into two half-frames, where each half-frame has a duration of 5ms. Each half-frame includes 5 sub-frames, where the duration of each sub-frame is T sf is 1 ms. Each subframe is divided into slots, and the number of slots in a subframe depends on the subcarrier spacing. Each slot includes 14 or 12 OFDM symbols based on the cyclic prefix (CP). In normal CP, each slot includes 14 OFDM symbols, and in extended CP, each slot includes 12 OFDM symbols. The parameter set is based on an exponentially scalable subcarrier spacing Δf=2 u *15kHz.

[0123] Table 1 shows the subcarrier spacing Δf=2 u *N, the number of OFDM symbols per time slot of 15 kHz slot symb , the number of time slots per frame N frame,u slot , and the number of slots N per subframe for normal CP subframe,u slot .

[0124] [Table 1]

[0125] u <![CDATA[N slot symb ]]> <![CDATA[N frame，u slot ]]> <![CDATA[N subframe,u slot ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0126] Table 2 shows the subcarrier spacing Δf=2 u *N, the number of OFDM symbols per time slot of 15 kHz slot symb , the number of time slots per frame N frame,u slot , and the number of slots N per subframe for the extended CPsubframe,u slot .

[0127] [Table 2]

[0128] u N slot symb ]]> <![CDATA[N frame,u slot ]]> N subfame，u slot ]]> 2 12 40 4

[0129] A slot includes multiple symbols (e.g., 14 or 12 symbols) in the time domain. For each parameter set (e.g., subcarrier spacing) and carrier, a common resource block (CRB) N is allocated from the CRBs indicated by higher layer signaling (e.g., RRC signaling). start,u grid To begin, define N size,u grid,x *N RB sc subcarriers and N subframe,u symb OFDM symbol resource grid, where N size,u grid,x N is the number of resource blocks (RBs) in the resource grid, with the subscript x being DL for the downlink and UL for the uplink. RB sc is the number of subcarriers per RB. In 3GPP-based wireless communication systems, N RB sc Typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL), there is one resource grid. The carrier bandwidth N for subcarrier spacing configuration u is size,u grid Given by higher-layer parameters (e.g., RRC parameters). Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and one complex symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l representing the symbol position relative to a reference point in the time domain.

[0130] In 3GPP-based wireless communication systems, an RB is defined by 12 consecutive subcarriers in the frequency domain. In 3GPP NR systems, RBs are classified into CRBs and physical resource blocks (PRBs). CRBs are numbered upwards from 0 in the frequency domain for subcarrier spacing configuration u. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u coincides with "point A", which is used as a common reference point for the resource block grid. In 3GPP NR systems, PRBs are defined within a bandwidth part (BWP) and are numbered from 0 to N. size BWP,i -1 numbering, where i is the number of the bandwidth part. Physical resource block n in bandwidth part i PRB With public resource block n CRB The relationship between them is as follows:PRB =n CRB +N size BWP,i , where N size BWP,i A BWP is a common resource block that begins with CRB 0. A BWP consists of multiple contiguous RBs. A carrier can include up to N (e.g., 5) BWPs. A UE can be configured with one or more BWPs on a given component carrier. Of the BWPs configured for a UE, only one can be active at a time. The active BWP defines the UE's operating bandwidth within the cell's operating bandwidth.

[0131] The NR frequency band can be defined as two types of frequency ranges, namely, FR1 and FR2. The numerical values ​​of the frequency ranges can be changed. For example, the two types of frequency ranges (FR1 and FR2) can be shown in Table 3 below. For ease of explanation, in the frequency range used in the NR system, FR1 can represent "sub-6 GHz range", FR2 can represent "above 6 GHz range" and can be called millimeter wave (mmW).

[0132] [Table 3]

[0133] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz-6000MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0134] As described above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 can include a frequency band of 410 MHz to 7125 MHz, as shown in Table 4 below. That is, FR1 can include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or larger. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or larger included in FR1 can include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes, such as for communication in vehicles (e.g., autonomous driving).

[0135] [Table 4]

[0136] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0137] In the present disclosure, the term "cell" may refer to a geographical area in which one or more nodes provide a communication system or to a radio resource. A "cell" as a geographical area may be understood as a coverage area within which a node can provide services using a carrier, and a "cell" as a radio resource (e.g., a time-frequency resource) is associated with a bandwidth, which is a frequency range configured by a carrier. A "cell" associated with a radio resource is defined by a combination of downlink resources and uplink resources (e.g., a combination of a DL component carrier (CC) and a UL CC). A cell may be configured only by downlink resources, or by downlink resources and uplink resources. Since the DL coverage (which is the range within which a node can send a valid signal) and the UL coverage (which is the range within which a node can receive a valid signal from a UE) depend on the carrier carrying the signal, the coverage of a node may be associated with the coverage of a "cell" of the radio resource used by the node. Therefore, the term "cell" may be used to sometimes refer to the service coverage of a node, to refer to a radio resource at other times, or to refer to the range within which a signal using a radio resource can reach with effective strength at other times.

[0138] In CA, two or more CCs are aggregated. The UE can receive or transmit on one or more CCs simultaneously depending on its capabilities. CA is supported for both contiguous CCs and non-contiguous CCs. When CA is configured, the UE has only one RRC connection with the network. During RRC connection establishment / reestablishment / handover, one serving cell provides NAS mobility information, and during RRC connection reestablishment / handover, one serving cell provides security input. This cell is called a primary cell (PCell). A PCell is a cell operating on the primary frequency, where the UE performs the initial connection establishment process or initiates a connection reestablishment process. Depending on the UE capabilities, a secondary cell (SCell) can be configured to form a set of serving cells together with the PCell. An SCell is a cell that provides additional radio resources on top of a special cell (PCell). Therefore, the set of configured serving cells for a UE always consists of one PCell and one or more SCells. For dual connectivity (DC) operation, the term "PCell" refers to the PCell of a primary cell group (MCG) or the primary SCell (PSCell) of a secondary cell group (SCG). SpCell supports PUCCH transmission and contention-based random access and is always activated. MCG is a set of serving cells associated with the master node, which includes SpCell (PCell) and optionally one or more SCells. For UEs configured with DC, SCG is a subset of serving cells associated with the secondary node, which includes PSCell and zero or more SCells. For UEs in RRC_CONNECTED that are not configured with CA / DC, there is only one serving cell consisting of PCell. For UEs in RRC_CONNECTED that are configured with CA / DC, the term "serving cell" is used to refer to the set of cells consisting of SpCell and all SCells. In DC, two MAC entities are configured in the UE: one for MCG and one for SCG.

[0139] Figure 9 An example of data flow in a 3GPP NR system to which an implementation of the present disclosure is applied is shown.

[0140] Reference Figure 9 "RB" stands for radio bearer, and "H" stands for header. Radio bearers are categorized into two groups: DRBs for user plane data and SRBs for control plane data. MAC PDUs are transmitted and received to and from external devices via the PHY layer using radio resources. MAC PDUs arrive at the PHY layer in the form of transport blocks.

[0141] In the PHY layer, the uplink transport channels UL-SCH and RACH are mapped to their physical channels PUSCH and PRACH, respectively, and the downlink transport channels DL-SCH, BCH and PCH are mapped to PDSCH, PBCH and PDSCH, respectively. In the PHY layer, uplink control information (UCI) is mapped to the physical PUCCH, and downlink control information (DCI) is mapped to the PDCCH. The MAC PDU associated with the UL-SCH is sent by the UE via the PUSCH based on the UL grant, and the MAC PDU associated with the DL-SCH is sent by the BS via the PDSCH based on the DL assignment.

[0142] In the following, waveforms, parameter sets, and frame structures are described. Reference may be made to Section 5.1 of 3GPP TS 38.300 v15.7.0.

[0143] The downlink transmission waveform is a conventional OFDM with a cyclic prefix. The uplink transmission waveform is a conventional OFDM with a cyclic prefix, where the transform precoding function that performs DFT spreading can be disabled or enabled.

[0144] The parameter set is based on an exponentially scalable subcarrier spacing ∆f = 2 u *15kHz, where μ={0,1,3,4} for PSS, SSS and PBCH, and μ={0,1,2,3} for other channels. Normal CP is supported for all subcarrier spacings, and extended CP is supported for μ=2.

[0145] Twelve consecutive subcarriers form a physical resource block (PRB), and a carrier supports a maximum of 275 PRBs.

[0146] Table 5 shows the supported transmission parameter sets.

[0147] [Table 5]

[0148] u <![CDATA[△f=2 u *15kHz]]> cyclic prefix Support for data Support for synchronization 0 15 normal yes yes 1 30 normal yes yes 2 60 Normal, Extended yes no 3 120 normal yes yes 4 240 normal no yes

[0149] A UE may be configured with one or more bandwidth parts on a given component carrier, of which only one may be active at a time. The active bandwidth part defines the UE's operating bandwidth within the cell's operating bandwidth. For initial access, and until the UE configuration in the cell is received, the initial bandwidth part detected from the system information is used.

[0150] Downlink and uplink transmissions are organized into frames of 10ms duration, consisting of ten 1ms subframes. Each frame is divided into two equally sized half-frames, each with five subframes. The slot duration is 14 symbols in normal CP and 12 symbols in extended CP, and scales with time as a function of the subcarrier spacing used, so there is always an integer number of slots in a subframe.

[0151] Timing Advance TA is used to adjust the uplink frame timing relative to the downlink frame timing.

[0152] Hereinafter, a physical downlink control channel is described.

[0153] The Physical Downlink Control Channel (PDCCH) can be used to schedule DL transmissions on the PDSCH and UL transmissions on the PUSCH. The Downlink Control Information (DCI) on the PDCCH includes:

[0154] - Downlink assignment containing at least Hybrid ARQ information, modulation and coding format, and resource allocation related to DL-SCH;

[0155] - Uplink scheduling grant containing at least Hybrid ARQ information, modulation and coding format, and resource allocation related to UL-SCH.

[0156] In addition to scheduling, PDCCH can also be used for:

[0157] - Activation and deactivation of configured PUSCH transmissions with configured grants;

[0158] -Activation and deactivation of PDSCH semi-persistent transmission;

[0159] - Informing one or more UEs of the timeslot format;

[0160] - Informing one or more UEs of the PRBs and OFDM symbols, which the UEs may assume do not have transmissions intended for them;

[0161] -Transmission of TPC commands for PUCCH and PUSCH;

[0162] - Transmission of one or more TPC commands for SRS transmission of one or more UEs;

[0163] - Switching the active bandwidth portion of the UE;

[0164] -Initiate random access procedure.

[0165] A UE monitors a set of PDCCH candidates in configured monitoring occasions in one or more configured control resource sets (CORESETs) according to a corresponding search space configuration.

[0166] A CORESET consists of a set of PRBs with a time duration of 1 to 3 OFDM symbols. Resource elements groups (REGs) and control channel elements (CCEs) are defined within a CORESET, each consisting of a set of REGs. A control channel is formed by an aggregation of CCEs. Different code rates of a control channel are realized by aggregating different numbers of CCEs. Interleaved and non-interleaved CCE-to-REG mapping is supported in a CORESET.

[0167] Polar coding is used for PDCCH.

[0168] Each resource element group carrying a PDCCH carries its own DMRS.

[0169] QPSK modulation is used for PDCCH.

[0170] In the following, bandwidth parts are described. Reference can be made to section 4.4.5 of 3GPP TS 38.211 V15.7.0.

[0171] A bandwidth part is a subset of contiguous common resource blocks in a bandwidth part for a given parameter set on a given carrier.

[0172] A UE can be configured with up to four bandwidth parts in the downlink, where a single downlink bandwidth part is active at a given time. It is not expected that the UE receives PDSCH, PDCCH, or CSI-RS (except for RRM) outside of the active bandwidth part.

[0173] A UE can be configured with up to four bandwidth parts in the uplink, where a single uplink bandwidth part is active at a given time. If a UE is configured with a supplementary uplink, the UE can additionally be configured with up to four bandwidth parts in the supplementary uplink, where a single supplementary uplink bandwidth part is active at a given time. The UE shall not transmit PUSCH or PUCCH outside of the active bandwidth part. For an active cell, the UE shall not transmit SRS outside of the active bandwidth part.

[0174] Figure 10 An example of a bandwidth part (BWP) configuration to which implementations of the present disclosure apply is shown.

[0175] Reference is made to Figure 10, a BWP consists of a set of contiguous physical resource blocks (PRBs). The bandwidth (BW) of a BWP cannot exceed the component carrier (CC) BW configured for the UE. The BWP BW needs to be at least as large as the BW of a synchronization signal (SS) block, but a BWP may or may not contain SS blocks. Each BWP is associated with a specific parameter set (i.e., subcarrier spacing (SCS) and cyclic prefix (CP) type). Therefore, a BWP is also a means to reconfigure a UE with a specific parameter set.

[0176] like Figure 10 As shown in the right figure, the network can configure multiple BWPs for the UE via radio resource control (RRC) signaling, and multiple BWPs can overlap in frequency. The granularity of BWP configuration is one PRB. For each serving cell, DL and UL BWPs are separated and independently configured for paired spectrum, and up to four BWPs can be configured for DL ​​and UL respectively. For unpaired spectrum, DL BWP and UL BWP are jointly configured as a pair, and up to four pairs can be configured. Up to four UL BWPs can also be configured for the supplementary UL (SUL).

[0177] Figure 11 Examples of continuous BWP and non-continuous BWP to which implementations of the present disclosure are applied are shown.

[0178] Reference Figure 11 For serving cell measurements, a UE may be configured with multiple BWPs, either consecutively or discontinuously. To derive the quality of the serving cell, the UE measures only the configured BWPs, rather than all BWPs belonging to the serving cell.

[0179] Each configured DL BWP includes at least one Control Resource Set (CORESET) with a UE-Specific Search Space (USS). The USS is a search space used by the UE to monitor possible receptions of control information destined for the UE. In the primary carrier, at least one of the configured DL BWPs includes a CORESET with a Common Search Space (CSS). The CSS is a search space used by the UE to monitor possible receptions of control information that is common to all UEs or destined for a specific UE. If the CORESET of the active DL BWP is not configured with a CSS, the UE does not need to monitor it. Note that the UE is expected to receive and transmit only within the frequency range configured for the active BWP with the relevant parameter set. However, there are exceptions. The UE can perform Radio Resource Management (RRM) measurements or transmit Sounding Reference Signals (SRS) outside of its active BWP via measurement gaps.

[0180] Figure 12 An example of multiple BWPs to which implementations of the present disclosure are applied is shown.

[0181] Reference Figure 12 Three BWPs can be configured. The first BWP can span a 40 MHz band and can apply a 15 kHz subcarrier spacing. The second BWP can span a 10 MHz band and can apply a 15 kHz subcarrier spacing. The third BWP can span a 20 MHz band and can apply a 60 kHz subcarrier spacing. The UE can configure at least one of the three BWPs as an active BWP and can perform UL and / or DL data communication through the active BWP.

[0182] BWPs are also a tool to switch the set of operating parameters of the UE. The set of parameters of a DL BWP configuration is used at least for the physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), and the corresponding demodulation RS (DMRS). Similarly, the set of parameters of a UL BWP configuration is used at least for the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH), and the corresponding DMRS. On the other hand, it is noted that there are limitations on the configuration of the set of parameters at least in early releases of NR. That is, the same set of parameters should be used within the same PUCCH group including both DL and UL.

[0183] With bandwidth adaptation (BA), the receive and transmit bandwidth of a UE does not have to be as large as the cell bandwidth and can be adjusted: the width can be commanded to change (e.g., shrink during periods of low activity to save power); the location can be moved in the frequency domain (e.g., to increase scheduling flexibility); and the subcarrier spacing can be commanded to change (e.g., to allow different services). A subset of the total cell bandwidth of a cell is called a bandwidth part (BWP), and BA is achieved by configuring a UE with BWPs and telling the UE which of the configured BWPs is the current active BWP.

[0184] Referring to Figure 12 , three different BWPs are configured:

[0185] - BWP1, width of 40 MHz and subcarrier spacing of 15 kHz;

[0186] - BWP2, width of 10 MHz and subcarrier spacing of 15 kHz;

[0187] - BWP3, width of 20 MHz and subcarrier spacing of 60 kHz.

[0188] In the following, bandwidth part (BWP) operation is described. Reference can be made to section 5.15 of 3GPP TS 38.321 v15.8.0.

[0189] A serving cell can be configured with one or more BWPs.

[0190] BWP switching of the serving cell is used to activate the inactive BWP and deactivate the active BWP at one time. BWP switching is controlled by the PDCCH indicating the downlink assignment or uplink grant, by the bwp-InactivityTimer, by RRC signaling, or by the MAC entity itself when the random access procedure is initiated. When RRC (re)configuration of firstActiveDownlinkBWP-Id and / or firstActiveUplinkBWP-Id is performed for the SpCell or when the SCell is activated, the DL BWP and / or ULBWP indicated by firstActiveDownlinkBWP-Id and / or firstActiveUplinkBWP-Id, respectively, are active without receiving a PDCCH indicating a downlink assignment or uplink grant. The active BWP of the serving cell is indicated by RRC or PDCCH. For unpaired spectrum, the DL BWP is paired with the UL BWP, and BWP switching is common to both UL and DL.

[0191] For each activated serving cell configured with a BWP, the MAC entity shall:

[0192] 1> If BWP is activated:

[0193] 2> Send on UL-SCH on BWP;

[0194] 2> If PRACH timing is configured, it is sent on RACH on BWP;

[0195] 2> Monitor PDCCH on BWP;

[0196] 2> Send PUCCH on BWP (if configured);

[0197] 2> Report the CSI of BWP;

[0198] 2>Send SRS on BWP (if configured);

[0199] 2> Receive DL-SCH on BWP;

[0200] 2> (Re)initialize any suspended configured uplink grants of configured grant type 1 on the active BWP according to the stored configuration (if any) and start in symbol

[0201] 1> If BWP is disabled:

[0202] 2> Not transmit on UL-SCH on BWP;

[0203] 2> Not sending on RACH on BWP;

[0204] 2>Do not monitor PDCCH on BWP;

[0205] 2> Do not send PUCCH on BWP;

[0206] 2> CSI of BWP is not reported;

[0207] 2> Do not send SRS on BWP;

[0208] 2> Do not receive DL-SCH on BWP;

[0209] 2> Clear any configured downlink assignments and configured uplink grants of configured grant type 2 on the BWP;

[0210] 2>Suspend any configured uplink grants of configured grant type 1 on the inactive BWP.

[0211] After initiating a random access procedure on a serving cell, and after selecting a carrier for performing the random access procedure, the MAC entity shall, for the selected carrier of the serving cell:

[0212] 1> If no PRACH timing is configured for the active UL BWP:

[0213] 2> Switch the active UL BWP to the BWP indicated by initialUplinkBWP;

[0214] 2> If the serving cell is SpCell:

[0215] 3> Switch the active DL BWP to the BWP indicated by initialDownlinkBWP.

[0216] 1> Otherwise:

[0217] 2> If the serving cell is SpCell:

[0218] 3> If the active DL BWP does not have the same bwp-Id as the active UL BWP:

[0219] 4> Switch the active DL BWP to a DL BWP with the same bwp-Id as the active UL BWP.

[0220] 1> Stop the bwp-InactivityTimer associated with the active DL BWP of this serving cell if it is running.

[0221] 1> If the serving cell is SCell:

[0222] 2> Stop the bwp-InactivityTimer associated with the SpCell's active DL BWP if it is running.

[0223] 1> Perform the random access procedure on the active DLBWP of the SpCell and the active UL BWP of this serving cell.

[0224] If the MAC entity receives a PDCCH for BWP switching of the serving cell, the MAC entity shall:

[0225] 1> if there is no ongoing random access procedure associated with the serving cell; or

[0226] 1> If, upon receipt of this PDCCH addressed to the C-RNTI, an ongoing random access procedure associated with this serving cell is successfully completed:

[0227] 2> Perform BWP switching to the BWP indicated by PDCCH.

[0228] If the MAC entity receives a PDCCH for BWP switching of a serving cell while a random access procedure associated with the serving cell is in progress in the MAC entity, then, in addition to the PDCCH reception for BWP switching addressed to the C-RNTI for successful random access procedure completion (in this case, the UE should perform BWP switching to the BWP indicated by the PDCCH), whether to switch the BWP or ignore the PDCCH for BWP switching depends on the UE implementation. Upon receiving a PDCCH for BWP switching other than successful contention resolution, if the MAC entity decides to perform BWP switching, the MAC entity should stop the ongoing random access procedure and initiate a random access procedure after performing the BWP switching; if the MAC decides to ignore the PDCCH for BWP switching, the MAC entity should continue the ongoing random access procedure on the serving cell.

[0229] While a random access procedure related to a serving cell is being performed in the MAC entity, upon receiving RRC (re)configuration for BWP switching of the serving cell, the MAC entity shall stop the ongoing random access procedure and initiate a random access procedure after performing BWP switching.

[0230] The MAC entity shall, for each activated serving cell configured with bwp-InactivityTimer:

[0231] 1> If defaultDownlinkBWP-Id is configured and the active DL BWP is not the BWP indicated by defaultDownlinkBWP-Id; or

[0232] 1> If defaultDownlinkBWP-Id is not configured and the active DL BWP is not initialDownlinkBWP:

[0233] 2> if a PDCCH indicating a downlink assignment or uplink grant addressed to a C-RNTI or CS-RNTI is received on an active BWP; or

[0234] 2> If a PDCCH indicating a downlink assignment or uplink grant addressed to a C-RNTI or CS-RNTI is received for an active BWP; or

[0235] 2> If a MAC PDU is sent in a configured uplink grant or a MAC PDU is received in a configured downlink assignment:

[0236] 3> if there is no ongoing random access procedure associated with the serving cell; or

[0237] 3> If, upon receipt of this PDCCH addressed to the C-RNTI, an ongoing random access procedure associated with this serving cell is successfully completed:

[0238] 4> Start or restart the bwp-InactivityTimer associated with the active DL BWP.

[0239] 2> If the bwp-InactivityTimer associated with the active DL BWP expires:

[0240] 3>If defaultDownlinkBWP-Id is configured:

[0241] 4> Perform BWP handover to the BWP indicated by defaultDownlinkBWP-Id.

[0242] 3> Otherwise:

[0243] 4>Execute BWP switch to initialDownlinkBWP.

[0244] If a random access procedure is initiated on an SCell, both the SCell and the SpCell are associated with the random access procedure.

[0245] 1> If PDCCH for BWP switching is received and the MAC entity switches the active DL BWP:

[0246] 2> If defaultDownlinkBWP-Id is configured and the MAC entity switches to a DL BWP that is not indicated by defaultDownlinkBWP-Id; or

[0247] 2> If defaultDownlinkBWP-Id is not configured and the MAC entity switches to a DL BWP that is not initialDownlinkBWP:

[0248] 3> Start or restart the bwp-InactivityTimer associated with the active DL BWP.

[0249] Hereinafter, a scheduling request is described.

[0250] A Scheduling Request (SR) is used to request UL-SCH resources for a new transmission.

[0251] The MAC entity can be configured with zero, one, or more SR configurations. An SR configuration consists of a set of PUCCH resources for SR across different BWPs and cells. For logical channels, each BWP is configured with at most one PUCCH resource for SR.

[0252] Each SR configuration corresponds to one or more logical channels. Each logical channel can be mapped to zero or one SR configuration, which is configured by RRC. The SR configuration of the logical channel that triggered the BSR (if such a configuration exists) is considered to be the SR configuration corresponding to the triggered SR.

[0253] The RRC configures the following parameters for the scheduling request process:

[0254] -sr-ProhibitTimer (configured per SR);

[0255] -sr-TransMax (per SR configuration).

[0256] The following UE variables are used in the scheduling request procedure:

[0257] -SR_COUNTER (per SR configuration).

[0258] If an SR is triggered and there is no other SR pending corresponding to the same SR configuration, the MAC entity shall set the SR_COUNTER of the corresponding SR configuration to 0.

[0259] When an SR is triggered, it shall be considered pending until it is canceled. All pending SRs triggered before MAC PDU assembly shall be canceled and each corresponding sr-ProhibitTimer shall be stopped when a MAC PDU is sent that includes a Long BSR MAC CE or a Short BSR MAC CE containing the buffer status up to and including the last event that triggered a BSR before MAC PDU assembly. When the UL grant can accommodate all pending data available for transmission, all pending SRs shall be canceled and each corresponding sr-ProhibitTimer shall be stopped.

[0260] Only the PUCCH resources on the BWP that are active at the time of the SR transmission opportunity are considered valid.

[0261] As long as at least one SR is pending, the MAC entity shall, for each pending SR:

[0262] 1> If the MAC entity does not configure valid PUCCH resources for the pending SR:

[0263] 2>Initiate a random access procedure on the SpCell and cancel the pending SR.

[0264] 1> Otherwise, for the SR configuration corresponding to the pending SR:

[0265] 2> when the MAC entity configures an SR transmission opportunity on a valid PUCCH resource for SR; and 2> if the sr-ProhibitTimer is not running at the SR transmission opportunity; and

[0266] 2> If the PUCCH resource of the SR transmission opportunity does not overlap with the measurement gap; and

[0267] 2> If the PUCCH resources of the SR transmission opportunity do not overlap with the UL-SCH resources:

[0268] 3>If SR_COUNTER <sr-TransMax:

[0269] 4>Increment SR_COUNTER by 1;

[0270] 4> Instruct the physical layer to signal SR on a valid PUCCH resource for SR;

[0271] 4>Start sr-ProhibitTimer.

[0272] 3> Otherwise:

[0273] 4> Notify RRC to release PUCCH for all serving cells;

[0274] 4> inform RRC to release SRS for all serving cells;

[0275] 4> clear any configured downlink assignments and uplink grants;

[0276] 4> clear any PUSCH resources configured for semi-persistent CSI reporting;

[0277] 4> initiate a random access procedure on SpCell and cancel all pending SRs.

[0278] When the MAC entity has more than one valid PUCCH resource for an SR transmission occasion overlapping, which one to select for the SR to signal depends on the UE implementation.

[0279] If more than one individual SR triggers an instruction from the MAC entity to the PHY layer to signal an SR on the same valid PUCCH resource, the SR_COUNTER of the relevant SR configuration is only incremented once.

[0280] Since a pending SR for which no valid PUCCH resource is configured is initiated by the MAC entity prior to MAC PDU assembly, the MAC entity can stop an ongoing random access procedure, if any. Such a random access procedure can be stopped when the MAC PDU is transmitted using an UL grant other than the one provided by the random access response or when the UL grant can accommodate all pending data available for transmission, and the PDU includes a BSR MAC CE containing up to (and including) the last event that triggered a BSR prior to the MAC PDU assembly.

[0281] In the following, buffer status reporting will be described.

[0282] The MAC entity shall:

[0283] 1> if the buffer status reporting procedure determines that at least one BSR has been triggered and not cancelled:

[0284] 2> if UL-SCH resources are available for new transmissions and, as a result of logical channel prioritization, the UL-SCH resources can accommodate the BSR MAC CE plus its subheader:

[0285] 3> instruct the multiplexing and assembly procedure to generate the BSR MAC CE;

[0286] 3> start or restart the periodicBSR-Timer, unless all generated BSRs are long or short truncated BSRs;

[0287] 3>Start or restart retxBSR-Timer.

[0288] 2> If regular BSR is triggered and logicalChannelSR-DelayTimer is not running:

[0289] 3> if there are no UL-SCH resources available for new transmission; or

[0290] 3> If the MAC entity is configured with a configured uplink grant and a regular BSR is triggered for a logical channel with logicalChannelSR-Mask set to false; or

[0291] 3> If the UL-SCH resources available for new transmission do not satisfy the LCP mapping restrictions configured for the logical channel that triggered the BSR:

[0292] 4>Trigger scheduling request.

[0293] Hereinafter, operations related to the dormant state are described. Reference may be made to Sections 7.5, 7.6, and 11.2 of 3GPP TS 36.300 v16.0.0 and Section 5.3 of 3GPP TS 36.331 v15.8.0.

[0294] Carrier aggregation is described.

[0295] When Carrier Access Control (CA) is configured, the UE has only one RRC connection with the network. During RRC connection establishment / reestablishment / handover, one serving cell provides NAS mobility information (e.g., TAI), and during RRC connection reestablishment / handover, one serving cell provides security input. This cell is called the primary cell (PCell). In the downlink, the carrier corresponding to the PCell is the downlink primary component carrier (DL PCC), and in the uplink, it is the uplink primary component carrier (UL PCC).

[0296] Depending on UE capabilities, a secondary cell (SCell) can be configured to form a group of serving cells together with the PCell. In the downlink, the carrier corresponding to the SCell is the downlink secondary component carrier (DL SCC), and in the uplink it is the uplink secondary component carrier (UL SCC).

[0297] Therefore, a UE's configured set of serving cells always consists of one PCell and one or more SCells:

[0298] - For each SCell, the UE's use of uplink resources in addition to downlink resources is configurable (thus, the number of configured DL SCCs is always greater than or equal to the number of UL SCCs, and an SCell cannot be configured for uplink resources only);

[0299] -SCell can be configured to start in deactivated, dormant or activated mode;

[0300] -From the UE's perspective, each uplink resource belongs to only one serving cell;

[0301] -The number of configurable serving cells depends on the aggregation capability of the UE;

[0302] - PCell can be changed only through the handover procedure (i.e., with security key change and, unless RACH-less HO is configured, with RACH procedure);

[0303] -PCell is used for PUCCH transmission;

[0304] -If DC is not configured, an additional PUCCH, PUCCH SCell, can be configured on the SCell;

[0305] - Unlike SCell, PCell cannot be deactivated or placed in dormant SCell state;

[0306] - Re-establishment is triggered when the PCell experiences RLF instead of when the SCell experiences RLF;

[0307] -NAS information is obtained from PCell.

[0308] SCell reconfiguration, addition, and removal can be performed via RRC. In intra-LTE handovers, RRC can also add, remove, or reconfigure SCells for use with the target PCell. When adding a new SCell, dedicated RRC signaling is used to transmit all required system information for the SCell. That is, in connected mode, the UE does not need to obtain broadcast system information directly from the SCell. In addition to dedicated SCell configurations, generic configurations applicable to multiple SCells can also be provided.

[0309] When configuring PUCCH SCells, RRC configures the mapping of each serving cell to either the primary or secondary PUCCH group, i.e., for each SCell, whether the PCell or the PUCCH SCell is used for transmission of ACK / NAK and CSI reports. A PUCCH SCell cannot be dormant.

[0310] Dual connectivity is described.

[0311] In DC, a UE's configured set of serving cells consists of two subsets: a Primary Cell Group (MCG) containing the serving cells of the MeNB and a Secondary Cell Group (SCG) containing the serving cells of the SeNB.

[0312] When the UE is configured with CA in MCG, the same principle applies to MCG.

[0313] For SCG, the following principles apply:

[0314] - At least one cell in the SCG has a configured UL CC, and one of them (named PSCell) is configured with PUCCH resources;

[0315] -When SCG is configured, there is always at least one SCG bearer or one split bearer;

[0316] - When a physical layer problem or random access problem is detected on the PSCell, or the maximum number of RLC retransmissions associated with the SCG has been reached, or when an access problem is detected on the PSCell during an SCG change (T307 expires), or when the maximum transmission timing difference between CGs is exceeded:

[0317] -Do not trigger the RRC connection re-establishment process;

[0318] - Stop all UL transmissions towards all cells of the SCG;

[0319] -MeNB is notified by UE of SCG failure type;

[0320] - For split bearers, DL data transmission on the MeNB is maintained.

[0321] -For split bearers, only RLC AM bearers can be configured;

[0322] -Similar to PCell, PSCell cannot be deactivated and cannot be in dormant SCell state;

[0323] Describes the activation / deactivation mechanism.

[0324] To enable reasonable UE battery consumption when configuring CA, an activation / deactivation mechanism for SCells is supported (i.e. activation / deactivation does not apply to PCell). When an SCell is deactivated, the UE does not need to receive the corresponding PDCCH or PDSCH, cannot transmit in the corresponding uplink, and does not need to perform CQI measurements. Conversely, when an SCell is in active state, the UE shall receive PDSCH and PDCCH (if the UE is configured to monitor PDCCH from this SCell) and is expected to be able to perform CQI measurements. To enable faster CQI reporting, a temporary CQI reporting period (referred to as short CQI period) can be supported during SCell activation. E-UTRAN ensures that SCells of a secondary PUCCH group shall not be activated or dormant when the PUCCH SCell is deactivated. E-UTRAN ensures that SCells mapped to a PUCCH SCell are deactivated before the PUCCH SCell is changed or removed.

[0325] To enable faster transition to active state, a dormant state for SCells is supported (i.e. not PCell or PSCell). When an SCell is in dormant state, the UE does not need to receive the corresponding PDCCH or PDSCH, cannot transmit in the corresponding uplink, but needs to perform CQI measurements. A PUCCH SCell cannot be in dormant state.

[0326] The activation / deactivation mechanism is based on a combination of MAC control elements and a deactivation timer. The MAC control element carries a bitmap for activation and deactivation of SCells: bits set to 1 indicate activation of the corresponding SCell, while bits set to 0 indicate deactivation. Using the bitmap, SCells can be activated and deactivated individually, and a single activation / deactivation command can activate / deactivate a subset of SCells. One deactivation timer is maintained per SCell, but a common value is configured by RRC per UE.

[0327] State transitions to / from the dormant SCell state use MAC control elements.

[0328] In reconfiguration without mobility control information:

[0329] - SCells added to the serving cell set are initially either "deactivated", "dormant" or "activated";

[0330] - SCells remaining in the serving cell set (unchanged or reconfigured) do not change their activation state ("activated", "deactivated" or "dormant").

[0331] In reconfiguration with mobility control information (i.e. handover):

[0332] - the SCell is "deactivated", "dormant" or "activated".

[0333] In DC, the serving cells of the MCG except the PCell can be activated / deactivated only by MAC control elements received on the MCG, while the serving cells of the SCG except the PSCell can be activated / deactivated only by MAC control elements received on the SCG. The MAC entity applies the bitmap to the relevant cells of the MCG or SCG. The PSCell in the SCG is always activated like the PCell (i.e. the deactivation timer is not applied to the PSCell). Each SCell maintains a deactivation timer except for the PUCCH SCell, but each CG is configured by RRC with a common value.

[0334] The reception (handover) by the UE of the RRCConnectionReconfiguration including mobilityControlInfo is described.

[0335] 1> for each SCell configured for the UE except the PSCell:

[0336] 2> if the received RRCConnectionReconfiguration message includes sCellState for the SCell and indicates activation:

[0337] 3> configure lower layers to consider the SCell in activated state;

[0338] 2> else if the received RRCConnectionReconfiguration message includes sCellState for the SCell and indicates dormant:

[0339] 3> configure lower layers to consider the SCell in dormant state;

[0340] 2> else:

[0341] 3> configure lower layers to consider the SCell in deactivated state.

[0342] The SCell addition / modification is described.

[0343] The UE shall:

[0344] 1> for each sCellIndex value included in sCellToAddModList or sCellToAddModListSCG (which is not part of the current UE configuration (SCell addition)):

[0345] 2> add an SCell corresponding to cellIdentification according to both radioResourceConfigCommonSCell and radioResourceConfigDedicatedSCell included in sCellToAddModList or sCellToAddModListSCG;

[0346] 2> if sCellState is configured for the SCell and indicates activated:

[0347] 3> configure lower layers to consider that the SCell is in activated state;

[0348] 2> else if sCellState is configured for the SCell and indicates dormant:

[0349] 3> configure lower layers to consider that the SCell is in dormant state.

[0350] As described above, a dormant SCell can be supported in NR. Similarly to the SCell, a dormant bandwidth part can be proposed in NR. The dormant bandwidth part can be applied to reduce UE battery consumption. For example, the dormant bandwidth part can not support PDCCH. That is, when the dormant bandwidth part is activated, the wireless device can not monitor the PDCCH.

[0351] If the dormant bandwidth part is activated for all cells belonging to a cell group (e.g., a master cell group (MCG) or a secondary cell group (SCG)), the wireless device can not perform PDCCH monitoring for the cell group. Then, the wireless device can minimize the power consumption required for PDCCH monitoring.

[0352] Although the cell group is in a dormant state (e.g., the dormant bandwidth part is activated for all cells belonging to the cell group), it can still be necessary to trigger a scheduling request for the cell group so that necessary uplink data (e.g., an RRC message) can be transmitted.

[0353] In this case, even if the scheduling request is triggered for the cell group, since the wireless device does not monitor the PDCCH for all cells belonging to the cell group, the wireless device cannot acquire an uplink grant to transmit the uplink data.

[0354] Therefore, research into autonomous change of a dormant bandwidth part in a wireless communication system is needed.

[0355] Hereinafter, a method for autonomous change of a dormant bandwidth part in a wireless communication system according to some embodiments of the present disclosure will be described with reference to the following drawings.

[0356] The following drawings are created to explain the specific embodiments of the present disclosure. The names of specific apparatuses or the names of 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. In this document, a wireless device can be referred to as a user equipment (UE).

[0357] Figure 13 An example of a method for autonomous change of a dormant bandwidth part in a wireless communication system according to some embodiments of the present disclosure is illustrated.

[0358] In particular, Figure 13 An example of a method performed by a wireless device is illustrated.

[0359] In step S1301, the wireless device can configure a cell group including a specific cell on which a physical uplink control channel (PUCCH) is configured.

[0360] For example, the wireless device can establish dual connectivity with the network. For example, the wireless device can be configured with a master cell group (MCG) and a secondary cell group (SCG) by the network. For example, the cell group can be a master cell group (MCG) or a secondary cell group (SCG) in dual connectivity.

[0361] According to some embodiments of the present disclosure, the cell group can be an SCG.

[0362] For example, the specific cell can be a primary SCell (PSCell) or a PUCCH SCell. The PSCell and the PUCCH SCell can be included in the SCG. The PSCell and the PUCCH SCell can be configured with at least one PUCCH.

[0363] For example, one additional PUCCH can be configured on an SCell, and the SCell can be referred to as a PUCCH SCell.

[0364] According to some embodiments of the present disclosure, the wireless device can select the specific cell among the SCG.

[0365] For example, cells 1, 2, 3, and 4 can belong to the SCG, and a PDCCH can be configured for cells 1, 2, and 3. In this case, the wireless device can select cell 1, 2, or 3 as the specific cell.

[0366] According to some embodiments of the present disclosure, the specific cell can be set by the network for each cell group.

[0367] According to some embodiments of the present disclosure, the specific cell may be more than one cell. If there is more than one specific cell, the wireless device may change the active bandwidth portion of more than one cell in the following steps. For example, the wireless device may change the active bandwidth portion of all cells in the SCG from a dormant bandwidth portion to another bandwidth portion.

[0368] In step S1302, the wireless device may activate a dormant bandwidth part (BWP) of a specific cell as an active BWP of the specific cell. A physical downlink control channel (PDCCH) may not be configured on the dormant BWP.

[0369] In other words, the wireless device may determine or designate a dormant bandwidth part (BWP) of a specific cell that is not configured with a PDCCH as an active BWP of the specific cell.

[0370] For example, the dormant bandwidth portion can be activated by BWP switching. BWP switching can be controlled by (1) a PDCCH indicating a downlink assignment or uplink grant; (2) a bwp-Inactivity Timer; (3) RRC signaling; and / or (4) the MAC entity itself when initiating a random access procedure. When activating a dormant BWP, the wireless device may not need to monitor the PDCCH of the corresponding cell.

[0371] In other words, when the dormant BWP of a specific cell is activated, the wireless device may skip monitoring of the PDCCH on the specific cell because there is no PDCCH on the dormant BWP of the specific cell.

[0372] According to some embodiments of the present disclosure, the cell group may be an SCG, and the wireless device may activate each dormant BWP of the PSCell and the PUCCH SCell as an active BWP, respectively.

[0373] According to some embodiments of the present disclosure, the wireless device may activate each dormant BWP of all cells belonging to a cell group as an active BWP, respectively.

[0374] According to some embodiments of the present disclosure, the wireless device may activate each dormant BWP of all cells configured with PUCCH in a cell group as an active BWP.

[0375] According to some embodiments of the present disclosure, if no PDCCH is configured for the active bandwidth portion of a cell, the wireless device may consider the cell to be a dormant cell or in a dormant state.

[0376] For example, if the corresponding SpCell (eg, PCell or PSCell) is in a dormant state, the wireless device may consider the cell group to be in a dormant state.

[0377] For example, if all cells belonging to a cell group are in a dormant state, the wireless device may consider the cell group to be in a dormant state. For example, the wireless device may determine whether a cell group is in a dormant state based solely on activated serving cells. If all activated serving cells belonging to a cell group are in a dormant state, the wireless device may consider the cell group to be in a dormant state.

[0378] In step S1303 , the wireless device may trigger a scheduling request procedure for a cell group.

[0379] During the scheduling request procedure, the wireless device may send a scheduling request to the network via the PUCCH configured on a specific cell.

[0380] For example, the wireless device may send a scheduling request to the network before switching the active BWP of a specific cell. In this case, the PUCCH may be configured on the dormant BWP of the specific cell.

[0381] For example, the wireless device may send a scheduling request to the network after switching the active BWP of a specific cell. In this case, the PUCCH may be configured on another BWP of the specific cell.

[0382] According to some embodiments of the present disclosure, a scheduling request may be triggered for a dormant cell group. In other words, a scheduling request may be triggered in a MAC entity corresponding to a cell group in a dormant state.

[0383] In step S1304, the wireless device may switch the active BWP of a specific cell from the dormant BWP to another BWP when the scheduling request procedure is triggered. At least one PDCCH may be configured on the other BWP.

[0384] For example, after switching the active BWP of a specific cell, the wireless device may monitor at least one PDCCH configured on another BWP of the specific cell.

[0385] For example, the wireless device may acquire uplink resources via at least one PDCCH configured on another BWP of a specific cell in response to a scheduling request procedure.

[0386] For example, another BWP may be an initial BWP. For example, the initial BWP may be a BWP used for initial access. For example, the initial BWP may be detected from system information. For example, the initial BWP may be referred to as BWP-Id=0.

[0387] For example, another BWP may be a default BWP. For example, the default BWP may be a BWP used when a BWP inactivity timer expires. For example, the wireless device may use an initial BWP as the default BWP.

[0388] For example, the network may predefine another BWP.

[0389] According to some embodiments of the present disclosure, a wireless device may perform switching based on each activated BWP of all cells configured with at least one PUCCH in a cell group as a dormant BWP.

[0390] For example, a cell configured with at least one PUCCH may be able to send scheduling requests to the network. Since all cells capable of sending scheduling requests do not monitor the PDCCH in a dormant state, the wireless device cannot receive uplink resources in response to the scheduling request. In this case, by performing a BWP handover on a specific cell, the wireless device can monitor the PDCCH on another BWP in the specific cell and obtain uplink resources via the PDCCH on the other BWP in the specific cell.

[0391] According to some embodiments of the present disclosure, the wireless device may determine that the cell group is in a dormant state based on each activated BWP of all cells belonging to the cell group being a dormant BWP. For example, the wireless device may perform handover based on the determination that the SCG is in a dormant state.

[0392] In other words, the wireless device may perform handover based on each activated BWP of all cells belonging to the SCG being a dormant BWP, respectively.

[0393] For example, if all cells belonging to a cell group do not monitor the PDCCH in a dormant state, the wireless device cannot receive uplink resources in response to a scheduling request. In this case, by performing a BWP handover on a specific cell, the wireless device can monitor the PDCCH on another BWP of the specific cell and acquire uplink resources via the PDCCH on the other BWP of the specific cell.

[0394] According to some embodiments of the present disclosure, a wireless device may communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0395] Figure 14 An example of a method for autonomous change of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure is shown.

[0396] According to the present disclosure, the UE may autonomously change the active bandwidth part from a bandwidth part not configured with a PDCCH to another bandwidth part configured with a PDCCH when a scheduling request is triggered.

[0397] For example, the UE may autonomously change the active bandwidth portion from the dormant bandwidth portion to the non-dormant bandwidth portion based on the triggering of the scheduling request.

[0398] For example, the UE may send a scheduling request before or after changing the active bandwidth portion.

[0399] For example, the UE may monitor the PDCCH after sending a scheduling request to acquire uplink resources on the new active bandwidth portion configured with the PDCCH.

[0400] Reference Figure 14 In step S1401, the UE may activate a bandwidth portion not configured with a PDCCH for all cells belonging to a cell group.

[0401] For example, there may be no PDCCH to monitor for a cell group.

[0402] For example, a bandwidth portion that is not configured with a PDCCH may be a dormant bandwidth portion. The dormant bandwidth portion may be at least one bandwidth portion among a plurality of configured bandwidth portions (e.g., four bandwidth portions). The dormant bandwidth portion may be pre-configured. The dormant bandwidth portion may be activated by a BWP switching, which is controlled by a PDCCH indicating a downlink assignment or uplink grant, by a bwp-InactivityTimer, by RRC signaling, or by the MAC entity itself when initiating a random access procedure. Once the dormant bandwidth portion is activated, the UE may not need to monitor the PDCCH of the corresponding cell.

[0403] For example, no PDCCH may be configured for the dormant bandwidth portion. If the dormant bandwidth portion is activated, there may be no PDCCH to be monitored for the corresponding cell.

[0404] For example, if no PDCCH is configured for the active bandwidth portion of a cell, the UE may consider the cell to be in a dormant state (eg, a dormant cell).

[0405] For example, if the corresponding SpCell (eg, PCell or PSCell) is in a dormant state, the UE may consider the cell group to be in a dormant state. For example, no PDCCH is configured for the active bandwidth portion of the corresponding SpCell.

[0406] For example, if all cells belonging to a cell group are in a dormant state, the UE may consider that the cell group is in a dormant state.

[0407] For example, the UE may determine whether a cell group is in a dormant state based only on activated serving cells. If all activated serving cells belonging to a cell group are in a dormant state, the UE may consider the cell group to be in a dormant state.

[0408] In step S1402, the UE may trigger a scheduling request for a cell group.

[0409] A scheduling request can be triggered for the dormant cell group. For example, the scheduling request can be triggered in the MAC entity corresponding to the cell group in the dormant state.

[0410] In step S1403, the UE can autonomously change the active bandwidth part of a specific cell belonging to the cell group to another bandwidth part configured with PDCCH.

[0411] If a scheduling request is triggered in the dormant cell group, the UE can autonomously change the active bandwidth part of a specific cell belonging to the cell group (e.g., a bandwidth part not configured with PDCCH) to another bandwidth part configured with PDCCH.

[0412] In other words, the UE can deactivate the current active bandwidth part (e.g., a bandwidth part not configured with PDCCH) and activate another bandwidth part configured with PDCCH. For example, the UE can perform BWP switching from the current downlink active bandwidth part (e.g., a downlink bandwidth part not configured with PDCCH) to another downlink bandwidth part configured with PDCCH for a specific cell.

[0413] According to some embodiments of the disclosure, the UE can also perform UL BWP switching if there is no PUCCH configured for the active UL BWP. If a scheduling request is triggered in the dormant cell group, the UE can perform BWP switching from the current uplink active bandwidth part (e.g., an uplink bandwidth part not configured with PUCCH) to another uplink bandwidth part configured with PUCCH for a specific cell.

[0414] A specific cell belonging to the dormant cell group can be selected in the following ways.

[0415] For example, the specific cell can be the SpCell of the cell group. For example, if the dormant cell group is a secondary cell group, the specific cell can be the PSCell. In this case, the UE can change the active bandwidth part of the SpCell of the cell group.

[0416] For example, the specific cell can be selected by the UE among the cells belonging to the cell group. For example, cells 1, 2, 3, 4 belong to the dormant cell group, and PDCCH is configured for cells 1, 2, 3, then the UE can select cell 1, 2, or 3 as the specific cell and change the active bandwidth part of the selected cell.

[0417] For example, the specific cell can be set by the network for each cell group. In this case, the UE can change the active bandwidth part of the cell designated by the network.

[0418] For example, the specific cell may be more than one cell. If there is more than one specific cell, the UE may change the active bandwidth portion of more than one cell. For example, the UE may change the active bandwidth portion of all cells belonging to the cell group.

[0419] You can select another bandwidth portion to activate in several ways.

[0420] For example, the new active bandwidth part may be the initial bandwidth part. In this case, the UE may change the active bandwidth part of a specific cell to the initial bandwidth part. The initial bandwidth part may be the bandwidth part used for initial access. The initial bandwidth part may be detected from system information. The initial bandwidth part may be referred to as BWP-Id = 0. For example, the UE may switch the active DL BWP to the BWP indicated by initialDownlinkBWP. The UE may switch the active UL BWP to the BWP indicated by initialUplinkBWP.

[0421] For example, the new active bandwidth part may be a default bandwidth part. In this case, the UE may change the active bandwidth part of a specific cell to the default bandwidth part. The default bandwidth part may be the bandwidth part used when the BWP inactivity timer expires. The UE may use the initial bandwidth part as the default bandwidth part. For example, the UE may switch the active DL BWP to the BWP indicated by defaultDownlinkBWP.

[0422] For example, the UE may select one DL bandwidth part among the DL bandwidth parts configured with the PDCCH and change the DL active bandwidth part to the selected DL bandwidth part.

[0423] For example, the UE may select one UL bandwidth part among the UL bandwidth parts configured with the PUCCH and change the UL active bandwidth part to the selected UL bandwidth part.

[0424] For example, the network may predefine a DL bandwidth portion with PDCCH and / or a UL bandwidth portion with PUCCH. In this case, the UE may change the active bandwidth portion to the predefined bandwidth portion.

[0425] Hereinafter, an example of a bandwidth part (BWP) operation performed by a wireless device for autonomously changing a dormant bandwidth part according to some embodiments of the present disclosure may be described.

[0426] A serving cell may be configured with one or more BWPs.

[0427] BWP switching of the serving cell is used to activate an inactive BWP and deactivate an active BWP at once. BWP switching is controlled by the PDCCH indicating a downlink assignment or uplink grant, by the bwp-InactivityTimer, by RRC signaling, or by the MAC entity itself when initiating a random access procedure or triggering a scheduling request.

[0428] When RRC (re)configuration of firstActiveDownlinkBWP-Id and / or firstActiveUplinkBWP-Id is performed for the SpCell or when the SCell is activated, the DL BWP and / or UL BWP indicated by firstActiveDownlinkBWP-Id and / or firstActiveUplinkBWP-Id, respectively, are active in the absence of a PDCCH indicating a downlink assignment or uplink grant. The active BWP of the serving cell is indicated by RRC or PDCCH. For unpaired spectrum, the DL BWP is paired with the UL BWP, and BWP switching is common to both UL and DL.

[0429] When initiating the scheduling request process, for SpCell, the MAC entity shall:

[0430] 1> If no PDCCH is configured for the active DL BWP:

[0431] 2>Switch the active DL BWP to the BWP indicated by initialDownlinkBWP;

[0432] 1> If PUCCH is not configured for the active UL BWP:

[0433] 2>Switch the active UL BWP to the BWP indicated by initialUplinkBWP;

[0434] Hereinafter, a device for autonomously changing a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure will be described. In this context, the device may be Figure 2 、 Figure 3 and Figure 5 A wireless device (100 or 200) in.

[0435] For example, the wireless device may perform Figure 13 and Figure 14 Detailed descriptions that overlap with the above may be simplified or omitted.

[0436] Reference Figure 5 , the wireless device 100 may include a processor 102 , a memory 104 , and a transceiver 106 .

[0437] According to some embodiments of the present disclosure, the processor 102 may be configured to be operably coupled with the memory 104 and the transceiver 106 .

[0438] The processor 102 may be configured to configure a cell group including a specific cell on which a physical uplink control channel (PUCCH) is configured. The processor 102 may be configured to activate a dormant bandwidth part (BWP) of the specific cell as an active BWP for the specific cell, wherein no physical downlink control channel (PDCCH) is configured on the dormant BWP. The processor 102 may be configured to trigger a scheduling request procedure for the cell group. The processor 102 may be configured to switch the active BWP of the specific cell from the dormant BWP to another BWP, wherein at least one PDCCH is configured on the other BWP, when the scheduling request procedure is triggered.

[0439] According to some embodiments of the present disclosure, the cell group may be a secondary cell group (SCG), and the specific cell may be a primary SCell (PSCell) or a PUCCH SCell, where the PSCell and the PUCCH SCell are included in the SCG.

[0440] In this case, the processor 102 may be configured to activate each dormant BWP of the PSCell and the PUCCH SCell as an active BWP, respectively.

[0441] According to some embodiments of the present disclosure, switching may be performed based on each activated BWP of all cells configured with at least one PUCCH in a cell group being a dormant BWP.

[0442] According to some embodiments of the present disclosure, the scheduling request procedure may include sending a scheduling request to the network via a PUCCH configured on a specific cell.

[0443] For example, the PUCCH may be configured on a dormant BWP of a specific cell, and a scheduling request may be sent to the network before switching the active BWP of the specific cell.

[0444] For other examples, the PUCCH may be configured on another BWP of a specific cell, and the scheduling request may be sent to the network after switching the active BWP of the specific cell.

[0445] According to some embodiments of the present disclosure, the processor 102 may be configured to monitor at least one PDCCH configured on another BWP of the specific cell after switching the active BWP of the specific cell.

[0446] For example, the processor 102 may be configured to acquire uplink resources via at least one PDCCH configured on another BWP of a specific cell in response to a scheduling request procedure.

[0447] According to some embodiments of the present disclosure, the processor 102 may be configured to skip monitoring of the PDCCH on a specific cell while activating a dormant BWP of the specific cell.

[0448] According to some embodiments of the present disclosure, the processor 102 may be configured to determine that the cell group is in the dormant state based on each activated BWP of all cells belonging to the cell group being a dormant BWP.

[0449] For example, handover may be performed based on a determination that a cell group is in a dormant state.

[0450] According to some embodiments of the present disclosure, the other BWP may be an initial BWP and / or a default BWP.

[0451] According to some embodiments of the present disclosure, the processor 102 may be configured to communicate with at least one of a user device other than a wireless device, a network, or an autonomous vehicle.

[0452] Hereinafter, a processor of a wireless device for autonomous change of a sleep bandwidth portion in a wireless communication system according to some embodiments of the present disclosure will be described.

[0453] The processor may be configured to control a wireless device to configure a cell group, the cell group including a specific cell on which a physical uplink control channel (PUCCH) is configured. The processor may be configured to control the wireless device to activate a dormant bandwidth part (BWP) of the specific cell as an active BWP for the specific cell, wherein no physical downlink control channel (PDCCH) is configured on the dormant BWP. The processor may be configured to control the wireless device to trigger a scheduling request procedure for the cell group. The processor may be configured to control the wireless device to switch the active BWP of the specific cell from the dormant BWP to another BWP, wherein at least one PDCCH is configured on the other BWP, when the scheduling request procedure is triggered.

[0454] According to some embodiments of the present disclosure, the cell group may be a secondary cell group (SCG), and the specific cell may be a primary SCell (PSCell) or a PUCCH SCell, where the PSCell and the PUCCH SCell are included in the SCG.

[0455] In this case, the processor may be configured to control the wireless device to activate each dormant BWP of the PSCell and the PUCCH SCell as an active BWP, respectively.

[0456] According to some embodiments of the present disclosure, switching may be performed based on each activated BWP of all cells configured with at least one PUCCH in a cell group being a dormant BWP.

[0457] According to some embodiments of the present disclosure, the scheduling request procedure may include sending a scheduling request to the network via a PUCCH configured on a specific cell.

[0458] For example, the PUCCH may be configured on a dormant BWP of a specific cell, and a scheduling request may be sent to the network before switching the active BWP of the specific cell.

[0459] For example, the PUCCH may be configured on another BWP of a specific cell, and a scheduling request may be sent to the network after switching the active BWP of the specific cell.

[0460] According to some embodiments of the present disclosure, the processor may be configured to control the wireless device to monitor at least one PDCCH configured on another BWP of the specific cell after switching the active BWP of the specific cell.

[0461] For example, the processor may be configured to control the wireless device to acquire uplink resources via at least one PDCCH configured on another BWP of a specific cell in response to a scheduling request procedure.

[0462] According to some embodiments of the present disclosure, the processor may be configured to control the wireless device to skip monitoring of the PDCCH on a specific cell while activating a dormant BWP of the specific cell.

[0463] According to some embodiments of the present disclosure, the processor may be configured to control the wireless device to determine that the cell group is in the dormant state based on each activated BWP of all cells belonging to the cell group being a dormant BWP.

[0464] For example, handover may be performed based on a determination that a cell group is in a dormant state.

[0465] According to some embodiments of the present disclosure, the other BWP may be an initial BWP and / or a default BWP.

[0466] According to some embodiments of the present disclosure, the processor may be configured to control the wireless device to communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0467] Hereinafter, a non-transitory computer-readable medium having stored thereon a plurality of instructions for autonomous changing of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure will be described.

[0468] According to some embodiments of the present disclosure, the technical features of the present disclosure may be implemented directly in hardware, in software executed by a processor, or in a combination of the two. For example, a method performed by a wireless device in wireless communication may be implemented in hardware, software, firmware, or any combination thereof. For example, the software may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other storage medium.

[0469] Some examples of storage media are coupled to a processor so that the processor can read information from the storage media. In an alternative embodiment, the storage medium can be integrated into the processor. The processor and storage medium can reside in an ASIC. For other examples, the processor and storage medium can reside as discrete components.

[0470] Computer-readable media may include tangible and non-transitory computer-readable storage media.

[0471] For example, non-transitory computer-readable media may include random access memory (RAM) such as synchronous dynamic random access memory (SDRAM), read-only memory (ROM), non-volatile random access memory (NVRAM), electrically erasable programmable read-only memory (EEPROM), FLASH memory, magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures. Non-transitory computer-readable media may also include combinations of the foregoing.

[0472] Furthermore, the methods described herein may be implemented at least in part by a computer-readable communication medium that carries or communicates code in the form of instructions or data structures and that can be accessed, read, and / or executed by a computer.

[0473] According to some embodiments of the present disclosure, a non-transitory computer-readable medium stores a plurality of instructions, and the stored plurality of instructions may be executed by a processor of a wireless device.

[0474] The stored instructions may cause the wireless device to configure a cell group including a specific cell on which a physical uplink control channel (PUCCH) is configured. The stored instructions may cause the wireless device to activate a dormant bandwidth part (BWP) of the specific cell as an active BWP for the specific cell, wherein no physical downlink control channel (PDCCH) is configured on the dormant BWP. The stored instructions may cause the wireless device to trigger a scheduling request procedure for the cell group. The stored instructions may cause the wireless device to switch the active BWP of the specific cell from the dormant BWP to another BWP, wherein at least one PDCCH is configured on the other BWP, when the scheduling request procedure is triggered.

[0475] According to some embodiments of the present disclosure, the cell group may be a secondary cell group (SCG), and the specific cell may be a primary SCell (PSCell) or a PUCCH SCell, where the PSCell and the PUCCH SCell are included in the SCG.

[0476] In this case, the stored multiple instructions may enable the wireless device to activate each dormant BWP of the PSCell and PUCCH SCell as an active BWP, respectively.

[0477] According to some embodiments of the present disclosure, switching may be performed based on each activated BWP of all cells configured with at least one PUCCH in a cell group being a dormant BWP.

[0478] According to some embodiments of the present disclosure, the scheduling request procedure may include sending a scheduling request to the network via a PUCCH configured on a specific cell.

[0479] For example, the PUCCH may be configured on a dormant BWP of a specific cell, and a scheduling request may be sent to the network before switching the active BWP of the specific cell.

[0480] For example, the PUCCH may be configured on another BWP of a specific cell, and a scheduling request may be sent to the network after switching the active BWP of the specific cell.

[0481] According to some embodiments of the present disclosure, after switching the active BWP of a specific cell, the stored plurality of instructions may cause the wireless device to monitor at least one PDCCH configured on another BWP of the specific cell.

[0482] For example, the stored plurality of instructions may enable the wireless device to acquire uplink resources via at least one PDCCH configured on another BWP of a specific cell in response to a scheduling request procedure.

[0483] According to some embodiments of the present disclosure, the stored plurality of instructions may enable the wireless device to skip monitoring of the PDCCH on a specific cell while activating a dormant BWP for the specific cell.

[0484] According to some embodiments of the present disclosure, the stored plurality of instructions may enable the wireless device to determine that the cell group is in a dormant state based on each activated BWP of all cells belonging to the cell group being a dormant BWP.

[0485] For example, handover may be performed based on a determination that a cell group is in a dormant state.

[0486] According to some embodiments of the present disclosure, the other BWP may be an initial BWP and / or a default BWP.

[0487] According to some embodiments of the present disclosure, the stored plurality of instructions may enable the wireless device to communicate with at least one of a user device other than the wireless device, a network, or an autonomous vehicle.

[0488] Hereinafter, a method for autonomous change of a dormant bandwidth part in a wireless communication system, performed by a base station (BS) according to some embodiments of the present disclosure, will be described.

[0489] The BS may receive a scheduling request from a wireless device in a scheduling request procedure.

[0490] Hereinafter, a base station (BS) for autonomous change of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure will be described.

[0491] The BS may include a transceiver, a memory, and a processor operatively coupled to the transceiver and the memory.

[0492] The processor may be configured to control the transceiver to receive a scheduling request from the wireless device via the PUCCH on the first BWP. The processor may be configured to control the transceiver to send uplink resources to the wireless device via the PDCCH on the second BWP in response to the scheduling request.

[0493] According to some embodiments of the present disclosure, the first BWP may be a dormant BWP that is not configured with a PDCCH. In this case, the second BWP may be a non-dormant BWP on which at least one PDCCH is configured. For example, the wireless device may perform an autonomous BWP switch from the first BWP to the second BWP.

[0494] According to some embodiments of the present disclosure, the first BWP and the second BWP may be non-dormant BWPs on which at least one PDCCH is configured. For example, the first BWP may be the same as the second BWP. For example, the wireless device may perform autonomous BWP switching before sending a scheduling request.

[0495] Hereinafter, a method for autonomous change of a dormant bandwidth part in a wireless communication system, performed by a base station (BS) according to some embodiments of the present disclosure, will be described.

[0496] The BS may receive a scheduling request from the wireless device via the PUCCH on the first BWP. The BS may send uplink resources to the wireless device via the PDCCH on the second BWP in response to the scheduling request.

[0497] According to some embodiments of the present disclosure, the first BWP may be a dormant BWP that is not configured with a PDCCH. In this case, the second BWP may be a non-dormant BWP on which at least one PDCCH is configured. For example, the wireless device may perform an autonomous BWP switch from the first BWP to the second BWP.

[0498] According to some embodiments of the present disclosure, the first BWP and the second BWP may be non-dormant BWPs on which at least one PDCCH is configured. For example, the first BWP may be the same as the second BWP. For example, the wireless device may perform autonomous BWP switching before sending a scheduling request.

[0499] Hereinafter, a base station (BS) for autonomous change of a dormant bandwidth portion in a wireless communication system according to some embodiments of the present disclosure will be described.

[0500] The BS may include a transceiver, a memory, and a processor operatively coupled to the transceiver and the memory.

[0501] The processor may be configured to control the transceiver to receive a scheduling request from the wireless device via the PUCCH on the first BWP. The processor may be configured to control the transceiver to send uplink resources to the wireless device via the PDCCH on the second BWP in response to the scheduling request.

[0502] The present disclosure may have various advantageous effects.

[0503] According to some embodiments of the present disclosure, a wireless device may efficiently perform autonomous switching of a dormant bandwidth portion.

[0504] For example, when all cells belonging to a cell group are in a dormant state for power saving, a wireless device may transmit necessary uplink (UL) data (eg, a UL RRC message) by autonomously changing an active bandwidth portion.

[0505] According to some embodiments of the present disclosure, a wireless communication system may efficiently provide a solution for using a dormant bandwidth portion by applying autonomous changes of the dormant bandwidth portion.

[0506] For example, even if all cells belonging to a cell group are in a dormant state, the network can receive necessary uplink (UL) data (eg, UL RRC message) by applying an autonomous bandwidth portion change of the dormant bandwidth portion.

[0507] The advantageous effects that can be obtained by the specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be various technical effects that can be understood and / or derived from the present disclosure by a person of ordinary skill in the relevant art. Therefore, the specific effects of the present disclosure are not limited to those explicitly described herein, but may include various effects that can be understood or derived from the technical features of the present disclosure.

[0508] The claims in this disclosure may be combined in various ways. For example, the technical features in the method claims of this disclosure may be combined to be implemented or performed in a device, and the technical features in the device claims may be combined to be implemented or performed in a method. Furthermore, the technical features in the method claims and the device claims may be combined to be implemented or performed in a device. Furthermore, the technical features in the method claims and the device claims may be combined to be implemented or performed in a method. Other implementations are within the scope of the appended claims.

Claims

1. A method comprising the following steps: configuring, by a wireless device, dual connectivity with a primary cell group and a secondary cell group, wherein the secondary cell group includes a specific cell, an uplink control channel is configured on the specific cell, and wherein the specific cell is a primary cell in the secondary cell group; activating, by the wireless device, a first bandwidth portion of the specific cell as an active bandwidth portion of the specific cell, wherein a downlink control channel is not configured on the first bandwidth portion; skipping, by the wireless device, monitoring of a downlink control channel on the specific cell when the first bandwidth portion of the specific cell is activated; triggering, by the wireless device, a scheduling request process corresponding to the secondary cell group; When triggering the scheduling request process, the wireless device determines that the secondary cell group is in a dormant state based on no downlink control channel being configured for each activated bandwidth portion of all cells belonging to the secondary cell group; selecting, by the wireless device, a second bandwidth portion of the specific cell, on which at least one downlink control channel and the uplink control channel are configured; performing, by the wireless device, an autonomous bandwidth portion switching of the active bandwidth portion from the first bandwidth portion to the second bandwidth portion by deactivating the first bandwidth portion and activating the second bandwidth portion based on a determination that the secondary cell group is in the dormant state; After the autonomous handover, the wireless device sends a scheduling request for the secondary cell group to a network via the uplink control channel configured on the second bandwidth part of the specific cell; monitoring, by the wireless device, the at least one downlink control channel configured for the second bandwidth portion of the particular cell; and In response to the scheduling request, at least one uplink resource is acquired by the wireless device from the network via the at least one downlink control channel configured on the second bandwidth portion of the specific cell.

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

3. A wireless device, comprising: transceiver; Memory; as well as at least one processor operatively coupled to the transceiver and the memory, and configured to perform operations comprising: configuring dual connectivity with a primary cell group and a secondary cell group, wherein the secondary cell group includes a specific cell, an uplink control channel is configured on the specific cell, and wherein the specific cell is a primary cell in the secondary cell group; activating a first bandwidth portion of the specific cell as an active bandwidth portion of the specific cell, wherein a downlink control channel is not configured on the first bandwidth portion; skipping monitoring of a downlink control channel on the specific cell when the first bandwidth part of the specific cell is activated; triggering a scheduling request process corresponding to the secondary cell group; determining, when triggering the scheduling request procedure, that the secondary cell group is in a dormant state based on no downlink control channel being configured for each activated bandwidth portion of all cells belonging to the secondary cell group; selecting a second bandwidth portion of the specific cell, on which at least one downlink control channel and the uplink control channel are configured; performing, based on determining that the secondary cell group is in the dormant state, an autonomous bandwidth portion switching of the active bandwidth portion from the first bandwidth portion to the second bandwidth portion by deactivating the first bandwidth portion and activating the second bandwidth portion; After the autonomous handover, sending a scheduling request for the secondary cell group to a network via the uplink control channel configured on the second bandwidth part of the specific cell; monitoring the at least one downlink control channel configured for the second bandwidth portion of the specific cell; and In response to the scheduling request, at least one uplink resource is acquired from the network via the at least one downlink control channel configured on the second bandwidth part of the specific cell.

4. A non-transitory computer-readable medium having stored thereon a plurality of instructions that, when executed by a processor of a wireless device, cause the wireless device to perform operations comprising: configuring dual connectivity with a primary cell group and a secondary cell group, wherein the secondary cell group includes a specific cell, an uplink control channel is configured on the specific cell, and wherein the specific cell is a primary cell in the secondary cell group; activating a first bandwidth portion of the specific cell as an active bandwidth portion of the specific cell, wherein a downlink control channel is not configured on the first bandwidth portion; skipping monitoring of a downlink control channel on the specific cell when the first bandwidth part of the specific cell is activated; triggering a scheduling request process corresponding to the secondary cell group; determining, when triggering the scheduling request procedure, that the secondary cell group is in a dormant state based on no downlink control channel being configured for each activated bandwidth portion of all cells belonging to the secondary cell group; selecting a second bandwidth portion of the specific cell, on which at least one downlink control channel and the uplink control channel are configured; performing, based on determining that the secondary cell group is in the dormant state, an autonomous bandwidth portion switching of the active bandwidth portion from the first bandwidth portion to the second bandwidth portion by deactivating the first bandwidth portion and activating the second bandwidth portion; After the autonomous handover, sending a scheduling request for the secondary cell group to a network via the uplink control channel configured on the second bandwidth part of the specific cell; monitoring the at least one downlink control channel configured for the second bandwidth portion of the specific cell; and In response to the scheduling request, at least one uplink resource is acquired from the network via the at least one downlink control channel configured on the second bandwidth part of the specific cell.

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