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WO2024258149A1 - Procédé et appareil de configuration de mobilité conditionnelle dans un système de communication sans fil - Google Patents

Procédé et appareil de configuration de mobilité conditionnelle dans un système de communication sans fil Download PDF

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Publication number
WO2024258149A1
WO2024258149A1 PCT/KR2024/007968 KR2024007968W WO2024258149A1 WO 2024258149 A1 WO2024258149 A1 WO 2024258149A1 KR 2024007968 W KR2024007968 W KR 2024007968W WO 2024258149 A1 WO2024258149 A1 WO 2024258149A1
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WIPO (PCT)
Prior art keywords
candidate
pcell
pscell
conditional
conditional mobility
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English (en)
Inventor
Sangwon Kim
Sunghoon Jung
Hongsuk Kim
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink

Definitions

  • the present disclosure relates to a method and apparatus for conditional mobility configuration in a wireless communication system.
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communications.
  • 3GPP 3rd generation partnership project
  • LTE long-term evolution
  • Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity.
  • the 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.
  • ITU international telecommunication union
  • NR new radio
  • 3GPP has to identify and develop the technology components needed for successfully standardizing the new RAT timely satisfying both the urgent market needs, and the more long-term requirements set forth by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process.
  • ITU-R ITU radio communication sector
  • IMT international mobile telecommunications
  • the NR should be able to use any spectrum band ranging at least up to 100 GHz that may be made available for wireless communications even in a more distant future.
  • the NR targets a single technical framework addressing all usage scenarios, requirements and deployment scenarios including enhanced mobile broadband (eMBB), massive machine-type-communications (mMTC), ultra-reliable and low latency communications (URLLC), etc.
  • eMBB enhanced mobile broadband
  • mMTC massive machine-type-communications
  • URLLC ultra-reliable and low latency communications
  • the NR shall be inherently forward compatible.
  • SCG Primary Secondary Cell Group
  • PSCell PSCell
  • CPAC conditional handover
  • the execution condition for CHO including CPAC consists of an execution condition associated with candidate Primary Cell (PCell) and an execution condition associated with candidate PSCell. If the CHO including CPC is configured, the UE execute the conditional handover when the execution condition for CHO including CPAC is met, that is, when both the execution condition associated with candidate PCell and the execution condition associated with the candidate PSCell are met.
  • UE For a candidate PCell, UE can be configured with both CHO without CPAC (i.e. conditional handover configuration not including conditional PSCell addition/change) and CHO including CPAC. If the execution condition for CHO without CPAC and the execution condition for CHO including CPAC are met simultaneously, the UE may execute CHO without CPAC.
  • CPAC conditional handover configuration not including conditional PSCell addition/change
  • the CHO without CPAC may or may not include secondary cell group (SCG) configuration. If the CHO without CPAC include SCG configuration, since the SCG is blindly added upon conditional handover, the quality of the SCG is not guaranteed. If the CHO without CPAC doesn't include the SCG configuration, the UE cannot use SCG upon conditional handover. Therefore, if the execution condition for CHO without CPAC and the execution condition for CHO including CPAC are met simultaneously, it is better for UE to execute CHO including CPAC so that the UE can add a qualified SCG upon conditional handover.
  • SCG secondary cell group
  • a method performed by a wireless device in a wireless communication system comprises: receiving information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary Secondary Cell Group (SCG) Cells (PSCells); based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists: - performing the conditional mobility for the candidate PCell and the candidate PSCell; and based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility does not exist: - performing the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • PCells Primary Cells
  • SCG Primary Secondary Cell Group
  • the wireless device can use qualified SCG upon conditional handover by applying an SCG which satisfies the execution condition.
  • conditional mobility can be performed using the SCG configuration.
  • the wireless communication system could provide an efficient solution for handling the conditional mobility configuration.
  • FIG. 2 shows an example of wireless devices to which implementations of the present disclosure is applied.
  • FIG. 3 shows an example of a wireless device to which implementations of the present disclosure is applied.
  • FIG. 4 shows another example of wireless devices to which implementations of the present disclosure is applied.
  • FIG. 5 shows an example of UE to which implementations of the present disclosure is applied.
  • FIGS. 6 and 7 show an example of protocol stacks in a 3GPP based wireless communication system to which implementations of the present disclosure is applied.
  • FIG. 8 shows a frame structure in a 3GPP based wireless communication system to which implementations of the present disclosure is applied.
  • FIG. 9 shows a data flow example in the 3GPP NR system to which implementations of the present disclosure is applied.
  • FIG. 10 shows an example of measurement reporting to which implementations of the present disclosure is applied.
  • FIGS. 11a, 11b, and 11c show an example of a conditional SN change procedure initiated by SN.
  • FIG. 12 shows an example of a method for conditional mobility configuration in a wireless communication system, according to some embodiments of the present disclosure.
  • FIG. 13 shows an example for prioritization of conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 14 shows an example for prioritizing conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 15 shows an example for handling conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 16 shows an example of ConditionalReconfiguration information element.
  • FIG. 17 shows an example of CondReconfigToAddModList information element.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • MC-FDMA multicarrier frequency division multiple access
  • CDMA may be embodied through radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
  • TDMA may be embodied through radio technology such as global system for mobile communications (GSM), general packet radio service (GPRS), or enhanced data rates for GSM evolution (EDGE).
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • EDGE enhanced data rates for GSM evolution
  • OFDMA may be embodied through radio technology such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or evolved UTRA (E-UTRA).
  • IEEE institute of electrical and electronics engineers
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • E-UTRA evolved UTRA
  • UTRA is a part of a universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA.
  • 3GPP LTE employs OFDMA in DL and SC-FDMA in UL.
  • LTE-advanced (LTE-A) is an evolved version of 3GPP LTE.
  • implementations of the present disclosure are mainly described in regards to a 3GPP based wireless communication system.
  • the technical features of the present disclosure are not limited thereto.
  • the following detailed description is given based on a mobile communication system corresponding to a 3GPP based wireless communication system, aspects of the present disclosure that are not limited to 3GPP based wireless communication system are applicable to other mobile communication systems.
  • a or B may mean “only A”, “only B”, or “both A and B”.
  • a or B in the present disclosure may be interpreted as “A and/or B”.
  • A, B or C in the present disclosure may mean “only A”, “only B”, “only C”, or "any combination of A, B and C”.
  • slash (/) or comma (,) may mean “and/or”.
  • A/B may mean “A and/or B”.
  • A/B may mean "only A”, “only B”, or “both A and B”.
  • A, B, C may mean "A, B or C”.
  • At least one of A and B may mean “only A”, “only B” or “both A and B”.
  • the expression “at least one of A or B” or “at least one of A and/or B” in the present disclosure may be interpreted as same as “at least one of A and B”.
  • At least one of A, B and C may mean “only A”, “only B”, “only C”, or “any combination of A, B and C”.
  • 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”.
  • parentheses used in the present disclosure may mean “for example”.
  • control information PDCCH
  • PDCCH control information
  • PDCCH control information
  • PDCCH control information
  • FIG. 1 shows an example of a communication system to which implementations of the present disclosure is applied.
  • the 5G usage scenarios shown in FIG. 1 are only exemplary, and the technical features of the present disclosure can be applied to other 5G usage scenarios which are not shown in FIG. 1.
  • Three main requirement categories for 5G include (1) a category of enhanced mobile broadband (eMBB), (2) a category of massive machine type communication (mMTC), and (3) a category of ultra-reliable and low latency communications (URLLC).
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC ultra-reliable and low latency communications
  • Partial use cases may require a plurality of categories for optimization and other use cases may focus only upon one key performance indicator (KPI).
  • KPI key performance indicator
  • eMBB far surpasses basic mobile Internet access and covers abundant bidirectional work and media and entertainment applications in cloud and augmented reality.
  • Data is one of 5G core motive forces and, in a 5G era, a dedicated voice service may not be provided for the first time.
  • voice will be simply processed as an application program using data connection provided by a communication system.
  • Main causes for increased traffic volume are due to an increase in the size of content and an increase in the number of applications requiring high data transmission rate.
  • a streaming service (of audio and video), conversational video, and mobile Internet access will be more widely used as more devices are connected to the Internet.
  • Cloud storage and applications are rapidly increasing in a mobile communication platform and may be applied to both work and entertainment.
  • the cloud storage is a special use case which accelerates growth of uplink data transmission rate.
  • 5G is also used for remote work of cloud. When a tactile interface is used, 5G demands much lower end-to-end latency to maintain user good experience.
  • Entertainment for example, cloud gaming and video streaming, is another core element which increases demand for mobile broadband capability. Entertainment is essential for a smartphone and a tablet in any place including high mobility environments such as a train, a vehicle, and an airplane.
  • Other use cases are augmented reality for entertainment and information search. In this case, the augmented reality requires very low latency and instantaneous data volume.
  • one of the most expected 5G use cases relates a function capable of smoothly connecting embedded sensors in all fields, i.e., mMTC. It is expected that the number of potential Internet-of-things (IoT) devices will reach 204 hundred million up to the year of 2020.
  • An industrial IoT is one of categories of performing a main role enabling a smart city, asset tracking, smart utility, agriculture, and security infrastructure through 5G.
  • URLLC includes a new service that will change industry through remote control of main infrastructure and an ultra-reliable/available low-latency link such as a self-driving vehicle.
  • a level of reliability and latency is essential to control a smart grid, automatize industry, achieve robotics, and control and adjust a drone.
  • 5G is a means of providing streaming evaluated as a few hundred megabits per second to gigabits per second and may complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS). Such fast speed is needed to deliver TV in 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.
  • a specific application program may require a special network configuration. For example, for VR games, gaming companies need to incorporate a core server into an edge network server of a network operator in order to minimize latency.
  • Automotive is expected to be a new important motivated force in 5G together with many use cases for mobile communication for vehicles. For example, entertainment for passengers requires high simultaneous capacity and mobile broadband with high mobility. This is because future users continue to expect connection of high quality regardless of their locations and speeds.
  • Another use case of an automotive field is an AR dashboard.
  • the AR dashboard causes a driver to identify an object in the dark in addition to an object seen from a front window and displays a distance from the object and a movement of the object by overlapping information talking to the driver.
  • a wireless module enables communication between vehicles, information exchange between a vehicle and supporting infrastructure, and information exchange between a vehicle and other connected devices (e.g., devices accompanied by a pedestrian).
  • a safety system guides alternative courses of a behavior so that a driver may drive more safely drive, thereby lowering the danger of an accident.
  • the next stage will be a remotely controlled or self-driven vehicle. This requires very high reliability and very fast communication between different self-driven vehicles and between a vehicle and infrastructure. In the future, a self-driven vehicle will perform all driving activities and a driver will focus only upon abnormal traffic that the vehicle cannot identify.
  • Technical requirements of a self-driven vehicle demand ultra-low latency and ultra-high reliability so that traffic safety is increased to a level that cannot be achieved by human being.
  • a smart city and a smart home/building mentioned as a smart society will be embedded in a high-density wireless sensor network.
  • a distributed network of an intelligent sensor will identify conditions for costs and energy-efficient maintenance of a city or a home. Similar configurations may be performed for respective households. All of temperature sensors, window and heating controllers, burglar alarms, and home appliances are wirelessly connected. Many of these sensors are typically low in data transmission rate, power, and cost. However, real-time HD video may be demanded by a specific type of device to perform monitoring.
  • the smart grid collects information and connects the sensors to each other using digital information and communication technology so as to act according to the collected information. Since this information may include behaviors of a supply company and a consumer, the smart grid may improve distribution of fuels such as electricity by a method having efficiency, reliability, economic feasibility, production sustainability, and automation.
  • the smart grid may also be regarded as another sensor network having low latency.
  • Mission critical application is one of 5G use scenarios.
  • a health part contains many application programs capable of enjoying benefit of mobile communication.
  • a communication system may support remote treatment that provides clinical treatment in a faraway place. Remote treatment may aid in reducing a barrier against distance and improve access to medical services that cannot be continuously available in a faraway rural area. Remote treatment is also used to perform important treatment and save lives in an emergency situation.
  • the wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as heart rate and blood pressure.
  • Wireless and mobile communication gradually becomes important in the field of an industrial application.
  • Wiring is high in installation and maintenance cost. Therefore, a possibility of replacing a cable with reconstructible wireless links is an attractive opportunity in many industrial fields.
  • it is necessary for wireless connection to be established with latency, reliability, and capacity similar to those of the cable and management of wireless connection needs to be simplified. Low latency and a very low error probability are new requirements when connection to 5G is needed.
  • Logistics and freight tracking are important use cases for mobile communication that enables inventory and package tracking anywhere using a location-based information system.
  • the use cases of logistics and freight typically demand low data rate but require location information with a wide range and reliability.
  • the communication system 1 includes wireless devices 100a to 100f, base stations (BSs) 200, and a network 300.
  • FIG. 1 illustrates a 5G network as an example of the network of the communication system 1, the implementations of the present disclosure are not limited to the 5G system, and can be applied to the future communication system beyond the 5G system.
  • the BSs 200 and the network 300 may be implemented as wireless devices and a specific wireless device may operate as a BS/network node with respect to other wireless devices.
  • the wireless devices 100a to 100f represent devices performing communication using radio access technology (RAT) (e.g., 5G new RAT (NR)) or LTE) and may be referred to as communication/radio/5G devices.
  • RAT radio access technology
  • the wireless devices 100a to 100f may include, without being limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a hand-held device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device/server 400.
  • the vehicles may include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles.
  • the vehicles may include an unmanned aerial vehicle (UAV) (e.g., a drone).
  • UAV unmanned aerial vehicle
  • the XR device may include an AR/VR/Mixed Reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc.
  • the hand-held device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or a smartglasses), and a computer (e.g., a notebook).
  • the home appliance may include a TV, a refrigerator, and a washing machine.
  • the IoT device may include a sensor and a smartmeter.
  • the wireless devices 100a to 100f may be called user equipments (UEs).
  • a UE may include, for example, a cellular phone, a smartphone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle having an autonomous traveling function, a connected car, an UAV, an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a FinTech device (or a financial device), a security device, a weather/environment device, a device related to a 5G service, or a device related to a fourth industrial revolution field.
  • PDA personal digital assistant
  • PMP portable multimedia player
  • PC slate personal computer
  • tablet PC a tablet PC
  • ultrabook a vehicle, a vehicle having an autonomous
  • the UAV may be, for example, an aircraft aviated by a wireless control signal without a human being onboard.
  • the VR device may include, for example, a device for implementing an object or a background of the virtual world.
  • the AR device may include, for example, a device implemented by connecting an object or a background of the virtual world to an object or a background of the real world.
  • the MR device may include, for example, a device implemented by merging an object or a background of the virtual world into an object or a background of the real world.
  • the hologram device may include, for example, a device for implementing a stereoscopic image of 360 degrees by recording and reproducing stereoscopic information, using an interference phenomenon of light generated when two laser lights called holography meet.
  • the public safety device may include, for example, an image relay device or an image device that is wearable on the body of a user.
  • the MTC device and the IoT device may be, for example, devices that do not require direct human intervention or manipulation.
  • the MTC device and the IoT device may include smartmeters, vending machines, thermometers, smartbulbs, door locks, or various sensors.
  • the medical device may be, for example, a device used for the purpose of diagnosing, treating, relieving, curing, or preventing disease.
  • the medical device may be a device used for the purpose of diagnosing, treating, relieving, or correcting injury or impairment.
  • the medical device may be a device used for the purpose of inspecting, replacing, or modifying a structure or a function.
  • the medical device may be a device used for the purpose of adjusting pregnancy.
  • the medical device may include a device for treatment, a device for operation, a device for (in vitro) diagnosis, a hearing aid, or a device for procedure.
  • the weather/environment device may include, for example, a device for monitoring or predicting a weather/environment.
  • the wireless devices 100a to 100f may be connected to the network 300 via the BSs 200.
  • An AI technology may be applied to the wireless devices 100a to 100f and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300.
  • the network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, and a beyond-5G network.
  • the wireless devices 100a to 100f may communicate with each other through the BSs 200/network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BSs 200/network 300.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V)/vehicle-to-everything (V2X) communication).
  • the IoT device e.g., a sensor
  • the IoT device may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.
  • the wireless communication/connections 150a, 150b and 150c may transmit/receive signals through various physical channels.
  • various configuration information configuring processes e.g., channel encoding/decoding, modulation/demodulation, and resource mapping/de-mapping
  • resource allocating processes for transmitting/receiving radio signals, may be performed based on the various proposals of the present disclosure.
  • FIG. 2 shows an example of wireless devices to which implementations of the present disclosure is applied.
  • a first wireless device 100 and a second wireless device 200 may transmit/receive radio signals to/from an external device through a variety of RATs (e.g., LTE and NR).
  • RATs e.g., LTE and NR
  • ⁇ the first wireless device 100 and the second wireless device 200 ⁇ may correspond to at least one of ⁇ the wireless device 100a to 100f and the BS 200 ⁇ , ⁇ the wireless device 100a to 100f and the wireless device 100a to 100f ⁇ and/or ⁇ the BS 200 and the BS 200 ⁇ of FIG. 1.
  • the first wireless device 100 may include one or more processors 102 and one or more memories 104 and additionally further include one or more transceivers 106 and/or one or more antennas 108.
  • the processor(s) 102 may control the memory(s) 104 and/or the transceiver(s) 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure.
  • the processor(s) 102 may process information within the memory(s) 104 to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver(s) 106.
  • the processor(s) 102 may receive radio signals including second information/signals through the transceiver(s) 106 and then store information obtained by processing the second information/signals in the memory(s) 104.
  • the memory(s) 104 may be connected to the processor(s) 102 and may store a variety of information related to operations of the processor(s) 102.
  • the memory(s) 104 may store software code including commands for performing a part or the entirety of processes controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure.
  • the processor(s) 202 may receive radio signals including fourth information/signals through the transceiver(s) 106 and then store information obtained by processing the fourth information/signals in the memory(s) 204.
  • the memory(s) 204 may be connected to the processor(s) 202 and may store a variety of information related to operations of the processor(s) 202.
  • the memory(s) 204 may store software code including commands for performing a part or the entirety of processes controlled by the processor(s) 202 or for performing the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure.
  • the processor(s) 202 and the memory(s) 204 may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR).
  • the transceiver(s) 206 may be connected to the processor(s) 202 and transmit and/or receive radio signals through one or more antennas 208.
  • Each of the transceiver(s) 206 may include a transmitter and/or a receiver.
  • the transceiver(s) 206 may be interchangeably used with RF unit(s).
  • the second wireless device 200 may represent a communication modem/circuit/chip.
  • One or more protocol layers may be implemented by, without being limited to, one or more processors 102 and 202.
  • the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as physical (PHY) layer, media access control (MAC) layer, radio link control (RLC) layer, packet data convergence protocol (PDCP) layer, radio resource control (RRC) layer, and service data adaptation protocol (SDAP) layer).
  • layers e.g., functional layers such as physical (PHY) layer, media access control (MAC) layer, radio link control (RLC) layer, packet data convergence protocol (PDCP) layer, radio resource control (RRC) layer, and service data adaptation protocol (SDAP) layer).
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • the one or more processors 102 and 202 may generate one or more protocol data units (PDUs) and/or one or more service data unit (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 may 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 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure and provide the generated signals to the one or more transceivers 106 and 206.
  • the one or more processors 102 and 202 may receive the signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and acquire the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers.
  • the one or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • firmware or software may be implemented using firmware or software and the firmware or software may be configured to include the modules, procedures, or functions.
  • Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may 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, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and/or a set of commands.
  • the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and/or commands.
  • the one or more memories 104 and 204 may be configured by read-only memories (ROMs), random access memories (RAMs), electrically erasable programmable read-only memories (EPROMs), flash memories, hard drives, registers, cash memories, computer-readable storage media, and/or combinations thereof.
  • the one or more memories 104 and 204 may be located at the interior and/or exterior of the one or more processors 102 and 202.
  • the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as wired or wireless connection.
  • the one or more transceivers 106 and 206 may transmit user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure, to one or more other devices.
  • the one or more transceivers 106 and 206 may receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure, from one or more other devices.
  • the one or more transceivers 106 and 206 may be connected to the one or more processors 102 and 202 and transmit and receive radio signals.
  • the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices.
  • the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.
  • the one or more transceivers 106 and 206 may convert received radio signals/channels, etc., from RF band signals into baseband signals in order to process received user data, control information, radio signals/channels, etc., using the one or more processors 102 and 202.
  • the one or more transceivers 106 and 206 may convert the user data, control information, radio signals/channels, etc., processed using the one or more processors 102 and 202 from the base band signals into the RF band signals.
  • the one or more transceivers 106 and 206 may include (analog) oscillators and/or filters.
  • the transceivers 106 and 206 can up-convert OFDM baseband signals to a carrier frequency by their (analog) oscillators and/or filters under the control of the processors 102 and 202 and transmit the up-converted OFDM signals at the carrier frequency.
  • the transceivers 106 and 206 may receive OFDM signals at a carrier frequency and down-convert the OFDM signals into OFDM baseband signals by their (analog) oscillators and/or filters under the control of the transceivers 102 and 202.
  • a UE may operate as a transmitting device in uplink (UL) and as a receiving device in downlink (DL).
  • a BS may operate as a receiving device in UL and as a transmitting device in DL.
  • the first wireless device 100 acts as the UE
  • the second wireless device 200 acts as the BS.
  • the processor(s) 102 connected to, mounted on or launched in the first wireless device 100 may be configured to perform the UE behavior according to an implementation of the present disclosure or control the transceiver(s) 106 to perform the UE behavior according to an implementation of the present disclosure.
  • the processor(s) 202 connected to, mounted on or launched in the second wireless device 200 may be configured to perform the BS behavior according to an implementation of the present disclosure or control the transceiver(s) 206 to perform the BS behavior according to an implementation of the present disclosure.
  • a BS is also referred to as a node B (NB), an eNode B (eNB), or a gNB.
  • NB node B
  • eNB eNode B
  • gNB gNode B
  • FIG. 3 shows an example of a wireless device to which implementations of the present disclosure is applied.
  • the wireless device may be implemented in various forms according to a use-case/service (refer to FIG. 1).
  • wireless devices 100 and 200 may correspond to the wireless devices 100 and 200 of FIG. 2 and may be configured by various elements, components, units/portions, and/or modules.
  • each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140.
  • the communication unit 110 may include a communication circuit 112 and transceiver(s) 114.
  • the communication circuit 112 may include the one or more processors 102 and 202 of FIG. 2 and/or the one or more memories 104 and 204 of FIG. 2.
  • the transceiver(s) 114 may include the one or more transceivers 106 and 206 of FIG.
  • the control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140 and controls overall operation of each of the wireless devices 100 and 200. For example, the control unit 120 may control an electric/mechanical operation of each of the wireless devices 100 and 200 based on programs/code/commands/information stored in the memory unit 130.
  • the control unit 120 may transmit the information stored in the memory unit 130 to the exterior (e.g., other communication devices) via the communication unit 110 through a wireless/wired interface or store, in the memory unit 130, information received through the wireless/wired interface from the exterior (e.g., other communication devices) via the communication unit 110.
  • the additional components 140 may be variously configured according to types of the wireless devices 100 and 200.
  • the additional components 140 may include at least one of a power unit/battery, input/output (I/O) unit (e.g., audio I/O port, video I/O port), a driving unit, and a computing unit.
  • I/O input/output
  • the wireless devices 100 and 200 may be implemented in the form of, without being limited to, the robot (100a of FIG. 1), the vehicles (100b-1 and 100b-2 of FIG. 1), the XR device (100c of FIG. 1), the hand-held device (100d of FIG. 1), the home appliance (100e of FIG. 1), the IoT device (100f of FIG.
  • the wireless devices 100 and 200 may be used in a mobile or fixed place according to a use-example/service.
  • the entirety of the various elements, components, units/portions, and/or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface or at least a part thereof may be wirelessly connected through the communication unit 110.
  • the control unit 120 and the communication unit 110 may be connected by wire and the control unit 120 and first units (e.g., 130 and 140) may be wirelessly connected through the communication unit 110.
  • Each element, component, unit/portion, and/or module within the wireless devices 100 and 200 may further include one or more elements.
  • the control unit 120 may be configured by a set of one or more processors.
  • control unit 120 may be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphical processing unit, and a memory control processor.
  • the memory 130 may be configured by a RAM, a DRAM, a ROM, a flash memory, a volatile memory, a non-volatile memory, and/or a combination thereof.
  • wireless devices 100 and 200 may correspond to the wireless devices 100 and 200 of FIG. 2 and may be configured by various elements, components, units/portions, and/or modules.
  • the first wireless device 100 may include at least one transceiver, such as a transceiver 106, and at least one processing chip, such as a processing chip 101.
  • the processing chip 101 may include at least one processor, such a processor 102, and at least one memory, such as a memory 104.
  • the memory 104 may be operably connectable to the processor 102.
  • the memory 104 may store various types of information and/or instructions.
  • the memory 104 may store a software code 105 which implements instructions that, when executed by the processor 102, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the software code 105 may implement instructions that, when executed by the processor 102, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the software code 105 may control the processor 102 to perform one or more protocols.
  • the software code 105 may control the processor 102 may perform one or more layers of the radio interface protocol.
  • the second wireless device 200 may include at least one transceiver, such as a transceiver 206, and at least one processing chip, such as a processing chip 201.
  • the processing chip 201 may include at least one processor, such a processor 202, and at least one memory, such as a memory 204.
  • the memory 204 may be operably connectable to the processor 202.
  • the memory 204 may store various types of information and/or instructions.
  • the memory 204 may store a software code 205 which implements instructions that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the software code 205 may control the processor 202 to perform one or more protocols.
  • the software code 205 may control the processor 202 may perform one or more layers of the radio interface protocol.
  • FIG. 5 shows an example of UE to which implementations of the present disclosure is applied.
  • a UE 100 may correspond to the first wireless device 100 of FIG. 2 and/or the first wireless device 100 of FIG. 4.
  • a UE 100 includes a processor 102, a memory 104, a transceiver 106, one or more antennas 108, a power management module 110, a battery 1112, a display 114, a keypad 116, a subscriber identification module (SIM) card 118, a speaker 120, and a microphone 122.
  • SIM subscriber identification module
  • the processor 102 may be configured to implement the descriptions, functions, procedures, 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, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • Layers of the radio interface protocol may be implemented in the processor 102.
  • the processor 102 may include ASIC, other chipset, logic circuit and/or data processing device.
  • the processor 102 may be an application processor.
  • the processor 102 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem (modulator and demodulator).
  • DSP digital signal processor
  • CPU central processing unit
  • GPU graphics processing unit
  • modem modulator and demodulator
  • processor 102 may be found in SNAPDRAGON TM series of processors made by Qualcomm ® , EXYNOS TM series of processors made by Samsung ® , A series of processors made by Apple ® , HELIO TM series of processors made by MediaTek ® , ATOM TM series of processors made by Intel ® or a corresponding next generation processor.
  • the memory 104 is operatively coupled with the processor 102 and stores a variety of information to operate the processor 102.
  • the memory 104 may include ROM, RAM, flash memory, memory card, storage medium and/or other storage device.
  • modules e.g., procedures, functions, etc.
  • the modules can be stored in the memory 104 and executed by the processor 102.
  • the memory 104 can be implemented within the processor 102 or external to the processor 102 in which case those can be communicatively coupled to the processor 102 via various means as is known in the art.
  • the transceiver 106 is operatively coupled with the processor 102, and transmits and/or receives a radio signal.
  • the transceiver 106 includes a transmitter and a receiver.
  • the transceiver 106 may include baseband circuitry to process radio frequency signals.
  • the transceiver 106 controls the one or more antennas 108 to transmit and/or receive a radio signal.
  • the display 114 outputs results processed by the processor 102.
  • the keypad 116 receives inputs to be used by the processor 102.
  • the keypad 16 may be shown on the display 114.
  • the SIM card 118 is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards.
  • IMSI international mobile subscriber identity
  • 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.
  • FIGS. 6 and 7 show an example of protocol stacks in a 3GPP based wireless communication system to which implementations of the present disclosure is applied.
  • FIG. 6 illustrates an example of a radio interface user plane protocol stack between a UE and a BS
  • FIG. 7 illustrates an example of a radio interface control plane protocol stack between a UE and a BS.
  • the control plane refers to a path through which control messages used to manage call by a UE and a network are transported.
  • the user plane refers to a path through which data generated in an application layer, for example, voice data or Internet packet data are transported.
  • the user plane protocol stack may be divided into Layer 1 (i.e., a PHY layer) and Layer 2.
  • the control plane protocol stack may be divided into Layer 1 (i.e., a PHY layer), Layer 2, Layer 3 (e.g., an RRC layer), and a non-access stratum (NAS) layer.
  • Layer 1 i.e., a PHY layer
  • Layer 2 e.g., an RRC layer
  • NAS non-access stratum
  • Layer 1 Layer 2 and Layer 3 are referred to as an access stratum (AS).
  • the Layer 2 is split into the following sublayers: MAC, RLC, and PDCP.
  • the Layer 2 is split into the following sublayers: MAC, RLC, PDCP and SDAP.
  • the PHY layer offers to the MAC sublayer transport channels, the MAC sublayer offers to the RLC sublayer logical channels, the RLC sublayer offers to the PDCP sublayer RLC channels, the PDCP sublayer offers to the SDAP sublayer radio bearers.
  • the SDAP sublayer offers to 5G core network quality of service (QoS) flows.
  • QoS quality of service
  • the main services and functions of the MAC sublayer include: mapping between logical channels and transport channels; multiplexing/de-multiplexing of MAC SDUs belonging to one or different logical channels into/from transport blocks (TB) delivered to/from the physical layer on transport channels; scheduling information reporting; error correction through hybrid automatic repeat request (HARQ) (one HARQ entity per cell in case of carrier aggregation (CA)); priority handling between UEs by means of dynamic scheduling; priority handling between logical channels of one UE by means of logical channel prioritization; padding.
  • HARQ hybrid automatic repeat request
  • a single MAC entity may support multiple numerologies, transmission timings and cells. Mapping restrictions in logical channel prioritization control which numerology(ies), cell(s), and transmission timing(s) a logical channel can use.
  • MAC Different kinds of data transfer services are offered by MAC.
  • multiple types of logical channels are defined, i.e., each supporting transfer of a particular type of information.
  • Each logical channel type is defined by what type of information is transferred.
  • Logical channels are classified into two groups: control channels and traffic channels. Control channels are used for the transfer of control plane information only, and traffic channels are used for the transfer of user plane information only.
  • Broadcast control channel is a downlink logical channel for broadcasting system control information
  • PCCH paging control channel
  • PCCH is a downlink logical channel that transfers paging information
  • common control channel CCCH
  • DCCH dedicated control channel
  • DTCH Dedicated traffic channel
  • a DTCH can exist in both uplink and downlink.
  • 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.
  • PCCH downlink shared channel
  • CCCH can be mapped to DL-SCH
  • DCCH can be mapped to DL-SCH
  • DTCH can be mapped to DL-SCH.
  • the RLC sublayer supports three transmission modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged node (AM).
  • the RLC configuration is per logical channel with no dependency on numerologies and/or transmission durations.
  • the main services and functions of the RLC sublayer depend on the transmission mode and include: transfer of upper layer PDUs; sequence numbering independent of the one in PDCP (UM and AM); error correction through ARQ (AM only); segmentation (AM and UM) and re-segmentation (AM only) of RLC SDUs; reassembly of SDU (AM and UM); duplicate detection (AM only); RLC SDU discard (AM and UM); RLC re-establishment; protocol error detection (AM only).
  • the main services and functions of the PDCP sublayer for the control plane include: sequence numbering; ciphering, deciphering and integrity protection; transfer of control plane data; reordering and duplicate detection; in-order delivery; duplication of PDCP PDUs and duplicate discard indication to lower layers.
  • 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 an RRC connection between the UE and NG-RAN; security functions including key management; establishment, configuration, maintenance and release of signaling radio bearers (SRBs) and data radio bearers (DRBs); mobility functions (including: handover and context transfer, UE cell selection and reselection and control of cell selection and reselection, inter-RAT mobility); QoS management functions; UE measurement reporting and control of the reporting; detection of and recovery from radio link failure; NAS message transfer to/from NAS from/to UE.
  • SRBs signaling radio bearers
  • DRBs data radio bearers
  • mobility functions including: handover and context transfer, UE cell selection and reselection and control of cell selection and reselection, inter-RAT mobility
  • QoS management functions UE measurement reporting and control of the reporting; detection of and recovery from radio link failure; NAS
  • OFDM numerologies e.g., subcarrier spacing (SCS), transmission time interval (TTI) duration
  • SCCS subcarrier spacing
  • TTI transmission time interval
  • symbols may include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbols).
  • Each frame is divided into two half-frames, where each of the half-frames has 5ms duration.
  • Each half-frame consists of 5 subframes, where the duration T sf per subframe is 1ms.
  • Each subframe is divided into slots and the number of slots in a subframe depends on a subcarrier spacing.
  • Each slot includes 14 or 12 OFDM symbols based on a cyclic prefix (CP). In a normal CP, each slot includes 14 OFDM symbols and, in an extended CP, each slot includes 12 OFDM symbols.
  • n PRB n CRB + N size BWP,i , where N size BWP,i is the common resource block where bandwidth part starts relative to CRB 0.
  • the BWP includes a plurality of consecutive RBs.
  • a carrier may include a maximum of N (e.g., 5) BWPs.
  • a UE may be configured with one or more BWPs on a given component carrier. Only one BWP among BWPs configured to the UE can active at a time. The active BWP defines the UE's operating bandwidth within the cell's operating bandwidth.
  • the NR frequency band may be defined as two types of frequency range, i.e., FR1 and FR2.
  • the numerical value of the frequency range may be changed.
  • the frequency ranges of the two types may be as shown in Table 3 below.
  • FR1 may mean "sub 6 GHz range”
  • FR2 may mean “above 6 GHz range”
  • mmW millimeter wave
  • the term "cell” may refer to a geographic area to which one or more nodes provide a communication system, or refer to radio resources.
  • a “cell” as a geographic area may be understood as coverage within which a node can provide service using a carrier and a "cell” as radio resources (e.g., time-frequency resources) is associated with bandwidth which is a frequency range configured by the carrier.
  • the "cell” associated with the radio resources is defined by a combination of downlink resources and uplink resources, for example, a combination of a DL component carrier (CC) and a UL CC.
  • the cell may be configured by downlink resources only, or may be configured by downlink resources and uplink resources.
  • the coverage of the node may be associated with coverage of the "cell" of radio resources used by the node. Accordingly, the term "cell" may be used to represent service coverage of the node sometimes, radio resources at other times, or a range that signals using the radio resources can reach with valid strength at other times.
  • CA two or more CCs are aggregated.
  • a UE may simultaneously receive or transmit on one or multiple CCs depending on its capabilities.
  • CA is supported for both contiguous and non-contiguous CCs.
  • the UE When CA is configured, the UE only has one RRC connection with the network.
  • one serving cell At RRC connection establishment/re-establishment/handover, one serving cell provides the NAS mobility information, and at RRC connection re-establishment/handover, one serving cell provides the security input.
  • This cell is referred to as the primary cell (PCell).
  • the PCell is a cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure.
  • secondary cells can be configured to form together with the PCell a set of serving cells.
  • An SCell is a cell providing additional radio resources on top of special cell (SpCell).
  • the configured set of serving cells for a UE therefore always consists of one PCell and one or more SCells.
  • the term SpCell refers to the PCell of the master cell group (MCG) or the primary SCell (PSCell) of the secondary cell group (SCG).
  • MCG master cell group
  • PSCell primary SCell
  • SCG secondary cell group
  • An SpCell supports PUCCH transmission and contention-based random access, and is always activated.
  • the MCG is a group of serving cells associated with a master node, comprised of the SpCell (PCell) and optionally one or more SCells.
  • Section 5.5 of 3GPP TS 38.331 v17.2.0 may be referred.
  • the network may configure the UE to perform the following types of measurements:
  • the network may configure the UE to report the following measurement information based on SS/PBCH block(s):
  • the network may configure the UE to report the following measurement information based on CSI-RS resources:
  • the network may configure the UE to perform the following types of measurements for NR sidelink and V2X sidelink:
  • the network may configure the UE to report the following CLI measurement information based on SRS resources:
  • the network may configure the UE to report the following CLI measurement information based on CLI-RSSI resources:
  • the network may configure the UE to report the following Rx-Tx time difference measurement information based on CSI-RS for tracking or PRS:
  • the measurement configuration includes the following parameters:
  • Measurement objects A list of objects on which the UE shall perform the measurements.
  • a measurement object indicates the frequency/time location and subcarrier spacing of reference signals to be measured.
  • the network may configure a list of cell specific offsets, a list of 'exclude-listed' cells and a list of 'allow-listed' cells. Exclude-listed cells are not applicable in event evaluation or measurement reporting. Allow-listed cells are the only ones applicable in event evaluation or measurement reporting.
  • the measObjectId of the MO which corresponds to each serving cell is indicated by servingCellMO within the serving cell configuration.
  • a measurement object is a single E-UTRA carrier frequency.
  • the network can configure a list of cell specific offsets and a list of 'exclude-listed' cells. Exclude-listed cells are not applicable in event evaluation or measurement reporting.
  • a measurement object is a set of cells on a single UTRA-FDD carrier frequency.
  • a measurement object is a single NR sidelink frequency to be measured.
  • a measurement object is a set of transmission resource pool(s) on a single carrier frequency for NR sidelink communication.
  • a measurement object is a set of discovery dedicated resource pool(s) or transmission resource pool(s) also used for NR sidelink discovery on a single carrier frequency for NR sidelink discovery.
  • a measurement object indicates the frequency/time location of SRS resources and/or CLI-RSSI resources, and subcarrier spacing of SRS resources to be measured.
  • Reporting configurations A list of reporting configurations where there can be one or multiple reporting configurations per measurement object.
  • Each measurement reporting configuration consists of the following:
  • the criterion that triggers the UE to send a measurement report This can either be periodical or a single event description.
  • - RS type The RS that the UE uses for beam and cell measurement results (SS/PBCH block or CSI-RS).
  • the quantities per cell and per beam that the UE includes in the measurement report e.g. RSRP
  • other associated information such as the maximum number of cells and the maximum number beams per cell to report.
  • each configuration consists of the following:
  • Execution criteria The criteria the UE uses for conditional reconfiguration execution.
  • - RS type The RS that the UE uses for obtaining beam and cell measurement results (SS/PBCH block-based or CSI-RS-based), used for evaluating conditional reconfiguration execution condition.
  • Measurement identities For measurement reporting, a list of measurement identities where each measurement identity links one measurement object with one reporting configuration. By configuring multiple measurement identities, it is possible to link more than one measurement object to the same reporting configuration, as well as to link more than one reporting configuration to the same measurement object.
  • the measurement identity is also included in the measurement report that triggered the reporting, serving as a reference to the network.
  • conditional reconfiguration triggering one measurement identity links to exactly one conditional reconfiguration trigger configuration. And up to 2 measurement identities can be linked to one conditional reconfiguration execution condition.
  • Quantity configurations The quantity configuration defines the measurement filtering configuration used for all event evaluation and related reporting, and for periodical reporting of that measurement.
  • the network may configure up to 2 quantity configurations with a reference in the NR measurement object to the configuration that is to be used. In each configuration, different filter coefficients can be configured for different measurement quantities, for different RS types, and for measurements per cell and per beam.
  • a UE in RRC_CONNECTED maintains a measurement object list, a reporting configuration list, and a measurement identities list according to signalling and procedures in this specification.
  • the measurement object list possibly includes NR measurement object(s), CLI measurement object(s), inter-RAT objects, and L2 U2N Relay objects.
  • the reporting configuration list includes NR, inter-RAT, and L2 U2N Relay reporting configurations. Any measurement object can be linked to any reporting configuration of the same RAT type. Some reporting configurations may not be linked to a measurement object. Likewise, some measurement objects may not be linked to a reporting configuration.
  • the measurement procedures distinguish the following types of cells:
  • the NR serving cell(s) - these are the SpCell and one or more SCells.
  • Detected cells these are cells that are not listed within the measurement object(s) but are detected by the UE on the SSB frequency(ies) and subcarrier spacing(s) indicated by the measurement object(s).
  • the UE measures and reports on the serving cell(s)/serving Relay UE (for L2 U2N Remote UE), listed cells and/or detected cells.
  • the UE measures and reports on listed cells and detected cells and, for RSSI and channel occupancy measurements, the UE measures and reports on the configured resources on the indicated frequency.
  • the UE measures and reports on listed cells.
  • the UE measures and reports on configured measurement resources (i.e. SRS resources and/or CLI-RSSI resources).
  • L2 U2N Relay object(s) the UE measures and reports on the serving NR cell(s), as well as the discovered L2 U2N Relay UEs.
  • the UE may receive two independent measConfig :
  • a measConfig associated with SCG, that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1.
  • the UE maintains two independent VarMeasConfig and VarMeasReportList , one associated with each measConfig , and independently performs all the procedures in clause 5.5 for each measConfig and the associated VarMeasConfig and VarMeasReportList , unless explicitly stated otherwise.
  • the configurations related to CBR measurements are only included in the measConfig associated with MCG.
  • the configurations related to Rx-Tx time difference measurement are only included in the measConfig associated with MCG.
  • the UE shall:
  • An RRC_CONNECTED UE shall derive cell measurement results by measuring one or multiple beams associated per cell as configured by the network. For all cell measurement results, except for RSSI, and CLI measurement results in RRC_CONNECTED, the UE applies the layer 3 filtering, before using the measured results for evaluation of reporting criteria, measurement reporting or the criteria to trigger conditional reconfiguration execution.
  • the network can configure RSRP, RSRQ, SINR, RSCP or EcN0 as trigger quantity.
  • the network can configure SRS-RSRP or CLI-RSSI as trigger quantity.
  • reporting quantities can be any combination of quantities (i.e.
  • reporting quantities can be either SRS-RSRP or CLI-RSSI.
  • the network can configure up to 2 quantities, both using same RS type.
  • the UE does not apply the layer 3 filtering to derive the CBR measurements.
  • the UE does not apply the layer 3 filtering to derive the Rx-Tx time difference measurements.
  • the network may also configure the UE to report measurement information per beam (which can either be measurement results per beam with respective beam identifier(s) or only beam identifier(s)). If beam measurement information is configured to be included in measurement reports, the UE applies the layer 3 beam filtering. On the other hand, the exact L1 filtering of beam measurements used to derive cell measurement results is implementation dependent.
  • Event A1 (Serving becomes better than threshold)
  • Event A2 (Serving becomes worse than threshold)
  • Event A5 (SpCell becomes worse than threshold1 and neighbour becomes better than threshold2)
  • Event B1 (Inter RAT neighbour becomes better than threshold)
  • Event B2 (PCell becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2)
  • Event C1 (The NR sidelink channel busy ratio is above a threshold)
  • Event C2 (The NR sidelink channel busy ratio is below a threshold)
  • Event X1 (Serving L2 U2N Relay UE becomes worse than threshold1 and NR Cell becomes better than threshold2)
  • Event X2 (Serving L2 U2N Relay UE becomes worse than threshold)
  • Event Y2 (Candidate L2 U2N Relay UE becomes better than threshold)
  • FIG. 10 shows an example of measurement reporting to which implementations of the present disclosure is applied.
  • This procedure is to transfer measurement results from the UE to the network.
  • the UE shall initiate this procedure only after successful AS security activation.
  • the UE shall set the measResults within the MeasurementReport message as follows:
  • measResultServingCell within measResultServingMOList to include RSRP, RSRQ and the available SINR of the serving cell, derived based on the rsType included in the reportConfig that triggered the measurement report;
  • measResultServingCell within measResultServingMOList to include RSRP, RSRQ and the available SINR of the serving cell, derived based on SSB;
  • measResultServingCell within measResultServingMOList to include RSRP, RSRQ and the available SINR of the serving cell, derived based on CSI-RS;
  • reportConfig associated with the measId that triggered the measurement reporting includes reportQuantityRS -Indexes and maxNrofRS -IndexesToReport :
  • each serving cell configured with servingCellMO include beam measurement information according to the associated reportConfig ;
  • reportConfig associated with the measId that triggered the measurement reporting includes reportAddNeighMeas :
  • measResultBestNeighCell within measResultServingMOList to include the physCellId and the available measurement quantities based on the reportQuantityCell and rsType indicated in reportConfig of the non-serving cell corresponding to the concerned measObjectNR with the highest measured RSRP if RSRP measurement results are available for cells corresponding to this measObjectNR , otherwise with the highest measured RSRQ if RSRQ measurement results are available for cells corresponding to this measObjectNR , otherwise with the highest measured SINR;
  • reportConfig associated with the measId that triggered the measurement reporting includes reportQuantityRS -Indexes and maxNrofRS -IndexesToReport:
  • Section 5.5.13 of 3GPP TS 38.331 v17.2.0 may be referred.
  • the network configures the UE with one or more candidate target SpCells in the conditional reconfiguration.
  • the UE evaluates the condition of each configured candidate target SpCell.
  • the UE applies the conditional reconfiguration associated with one of the target SpCells which fulfils associated execution condition.
  • the network provides the configuration parameters for the target SpCell in the ConditionalReconfiguration IE.
  • the UE may receive two independent conditionalReconfiguration :
  • conditionalReconfiguration associated with MCG that is included in the RRCReconfiguration message received via SRB1;
  • conditionalReconfiguration associated with SCG, that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1.
  • the UE maintains two independent VarConditionalReconfig , one associated with each conditionalReconfiguration ;
  • the UE independently performs all the procedures for each conditionalReconfiguration and the associated VarConditionalReconfig , unless explicitly stated otherwise;
  • the UE performs the procedures for the VarConditionalReconfig associated with the same cell group like the measConfig .
  • the UE performs the following actions based on a received ConditionalReconfiguration IE:
  • the UE shall:
  • Up to 2 MeasId can be configured for each condReconfigId .
  • the conditional reconfiguration event of the 2 MeasId may have the same or different event conditions, triggering quantity, time to trigger, and triggering threshold.
  • the UE shall:
  • the UE shall:
  • UE implementation which one to select, e.g. the UE considers beams and beam quality to select one of the triggered cells for execution.
  • the UE Upon initiating the procedure, the UE shall:
  • the UE Upon initiating the procedure, the UE shall:
  • the UE Upon initiating the procedure, the UE shall:
  • 3GPP TS 37.340 v17.3.0 may be referred.
  • the SN initiated conditional SN change procedure is used for CPC configuration and CPC execution.
  • the SN initiated conditional SN change procedure may also be initiated by the source SN, to modify the existing CPC configuration, or to trigger the release of the candidate SN by cancellation of all the prepared PSCells at the candidate SN and releasing the CPC related UE context at the candidate SN.
  • FIGS. 11a, 11b, and 11c show an example of a conditional SN change procedure initiated by SN.
  • FIGS. 11a, 11b, and 11c illustrate an example of signalling flow for the conditional SN Change initiated by the SN:
  • the source SN initiates the conditional SN change procedure by sending the SN Change Required message, which contains a CPC initiation indication.
  • the message also contains candidate node ID(s) and may include the SCG configuration (to support delta configuration), and contains the measurements results which may include cells that are not CPC candidates.
  • the message also includes a list of proposed PSCell candidates recommended by the source SN, including execution conditions, the upper limit for the number of PSCells that can be prepared by each candidate SN, and may also include the SCG measurement configurations for CPC (e.g. measurement ID(s) to be used for CPC).
  • the MN requests each candidate SN(s) to allocate resources for the UE by means of the SN Addition procedure(s), indicating the request is for CPAC, and the measurements results which may include cells that are not CPC candidates received from the source SN to the candidate SN, and indicating a list of proposed PSCell candidates received from the source SN, but not including execution conditions.
  • the candidate SN decides the list of PSCell(s) to prepare (considering the maximum number indicated by the MN) and, for each prepared PSCell, the candidate SN decides SCG SCells and provides the new corresponding SCG radio resource configuration to the MN in an NR RRCReconfiguration** message contained in the SgNB Addition Request Acknowledge message. If data forwarding is needed, the candidate SN provides data forwarding addresses to the MN.
  • the candidate SN includes the indication of full or delta RRC configuration, and the list of prepared PSCell IDs to the MN.
  • the candidate SN can either accept or reject each of the candidate cells suggested by the source SN, i.e., it cannot configure any alternative candidates.
  • the MN may indicate the candidate PSCells accepted by each candidate SN to the source SN via SN Modification Request message before it configures the UE, e.g., when not all candidate PSCells were accepted by the candidate SN(s). If the MN does not send such indication, step 4 and 5 are skipped. If requested, the source SN sends an SN Modification Request Acknowledge message and if needed, provides an updated measurement configurations and/or the execution conditions to the MN.
  • the MN sends to the UE an RRCReconfiguration message including the CPC configuration, i.e. a list of RRCReconfiguration* messages and associated execution conditions, in which each RRCReconfiguration* message contains the SCG configuration in the RRCReconfiguration** message received from the candidate SN in step 3 and possibly an MCG configuration.
  • the RRCReconfiguration message can also include an updated MCG configuration, as well as the NR RRCReconfiguration*** message generated by the source SN, e.g., to configure the required conditional measurements.
  • the UE applies the RRCReconfiguration message received in step 6, stores the CPC configuration and replies to the MN with an RRCReconfigurationComplete message, which can include an NR RRCReconfigurationComplete*** message. In case the UE is unable to comply with (part of) the configuration included in the RRCReconfiguration message, it performs the reconfiguration failure procedure.
  • the MN informs the source SN with the SN RRCReconfigurationComplete *** message via SN Change Confirm message. If step 4 and 5 are skipped, the MN will indicate the candidate PSCells accepted by each candidate SN to the source SN in the SN Change Confirm message.
  • the MN sends the SN Change Confirm message towards the source SN to indicate that CPC is prepared, and in such case the source SN continues providing user data to the UE. If early data forwarding is applied, the MN informs the source SN the data forwarding addresses as received from the candidate SN(s), the source SN, if applicable, together with the Early Status Transfer procedure, starts early data forwarding.
  • the PDCP SDU forwarding may take place during early data forwarding.
  • the MN includes a list of Target SN ID and list of data forwarding addresses to the source SN.
  • the Xn-U Address Indication procedure may further be invoked to indicate to the source SN to stop already initiated early data forwarding for some PDCP SDUs if they are no longer subject to data forwarding due to the modification or cancellation of the prepared conditional PSCell change.
  • the source SN may send the SN Modification Required message to trigger an update of CPC execution condition and/or corresponding SCG measurement configuration for CPC.
  • the MN reconfigures the UE and in step 9c the UE responds with RRCReconfigurationComplete , similarly as in steps 6 and 7.
  • the UE starts evaluating the execution conditions. If the execution condition of one candidate PSCell is satisfied, the UE applies RRCReconfiguration* message corresponding to the selected candidate PSCell, and sends an RRCReconfigurationComplete * message, including an RRCReconfigurationComplete** message for the selected candidate PSCell, and information enabling the MN to identify the SN of the selected candidate PSCell.
  • the MN triggers the MN initiated SN Release procedure to inform the source SN to stop providing user data to the UE, and triggers the Xn-U Address Indication procedure to inform the source SN the address of the SN of the selected candidate PSCell and if applicable, starts late data forwarding.
  • the MN informs the SN of the selected candidate PSCell via SN Reconfiguration Complete message, including the SN RRCReconfigurationComplete** message.
  • the MN sends the SN Release Request message(s) to cancel CPC in the other candidate SN(s), if configured.
  • the other candidate SN(s) acknowledges the release request.
  • the UE synchronizes to the PSCell indicated in the RRCReconfiguration* message applied in step 10.
  • the source SN sends the SN Status Transfer message, which the MN sends then to the SN of the selected candidate PSCell, if needed.
  • data forwarding from the source SN takes place. It may be initiated as early as the source SN receives the data forwarding address related information from the MN.
  • the source SN sends the Secondary RAT Data Usage Report message to the MN and includes the data volumes delivered to and received from the UE.
  • the order the SN sends the Secondary RAT Data Usage Report message and performs data forwarding with MN/target SN is not defined.
  • the SN may send the report when the transmission of the related QoS flow is stopped.
  • a PDU Session path update procedure is triggered by the MN.
  • the source SN Upon reception of the UE Context Release message, the source SN releases radio and C-plane related resources associated to the UE context. Any ongoing data forwarding may continue.
  • serving cell change is triggered by L3 measurements and is done by RRC signalling triggered Reconfiguration with Synchronisation for change of PCell and PSCell, as well as release add for SCells when applicable. All cases involve complete L2 (and L1) resets, leading to longer latency, larger overhead and longer interruption time than beam switch mobility.
  • L1/L2 mobility enhancements is to enable a serving cell change via L1/L2 signalling, in order to reduce the latency, overhead and interruption time.
  • Rel-18 should specify mechanisms for CHO and MR-DC to be configured simultaneously. However, this alone may not be sufficient to optimise MR-DC mobility, as the radio link quality of the conditionally-configured PSCell may not be good enough or may not be the best candidate PSCell when the UE accesses the target PCell, and this may impact the UE throughput. To mitigate this throughput impact, Rel-18 CHO+MRDC can consider CHO including target MCG and multiple candidate SCGs for CPC/CPA.
  • FR2 specific enhancements are not precluded, if any.
  • the procedure of L1/L2 based inter-cell mobility are applicable to the following scenarios:
  • Source and target cells may be synchronized or non-synchronized
  • a harmonized RRC modelling approach for objectives 1 and 2 could be considered to minimize the workload in RAN2 .
  • RAN4 will coordinate in due course with RAN2 to start the work.
  • the execution condition for CHO including CPAC consists of an execution condition associated with candidate PCell and an execution condition associated with candidate PSCell. If the CHO including CPC is configured, the UE execute the conditional handover when the execution condition for CHO including CPAC is met, that is, when both the execution condition associated with candidate PCell and the execution condition associated with the candidate PSCell are met.
  • UE For a candidate PCell, UE can be configured with both CHO without CPAC (i.e. conditional handover configuration not including conditional PSCell addition/change) and CHO including CPAC. If the execution condition for CHO without CPAC and the execution condition for CHO including CPAC are met simultaneously, the UE may execute CHO without CPAC.
  • CPAC conditional handover configuration not including conditional PSCell addition/change
  • the CHO without CPAC may or may not include SCG configuration. If the CHO without CPAC include SCG configuration, since the SCG is blindly added upon conditional handover, the quality of the SCG is not guaranteed. If the CHO without CPAC doesn't include the SCG configuration, the UE cannot use SCG upon conditional handover. Therefore, if the execution condition for CHO without CPAC and the execution condition for CHO including CPAC are met simultaneously, it is better for UE to execute CHO including CPAC so that the UE can add a qualified SCG upon conditional handover.
  • a wireless device may be referred to as a user equipment (UE).
  • UE user equipment
  • FIG. 12 shows an example of a method for conditional mobility configuration in a wireless communication system, according to some embodiments of the present disclosure.
  • FIG. 12 shows an example of a method performed by a wireless device in a wireless communication system.
  • a wireless device may receive information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary SCG Cells (PSCells).
  • PCells Primary Cells
  • PSCells Primary SCG Cells
  • the wireless device may receive a radio resource control (RRC) reconfiguration message from the network.
  • RRC radio resource control
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may be included in the RRC reconfiguration message.
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may include (i) information related to one or more execution conditions for the one or more candidate PCells and (ii) information related to one or more execution conditions for the one or more candidate PSCells.
  • each execution condition may be included in a conditional reconfiguration.
  • the conditional reconfiguration may include (i) an execution condition, (ii) a conditional reconfiguration ID, and (iii) an RRC reconfiguration.
  • the wireless device may evaluate a conditional reconfiguration related to the conditional mobility for one or more candidate PCells and one or more candidate PSCells.
  • the wireless device may perform measurements for the one or more candidate PCells and the one or more candidate PSCells to evaluate the conditional reconfiguration.
  • the wireless device may receive, from a network, a conditional reconfiguration for a conditional handover for a PCell with a conditional PSCell addition or change for a PSCell.
  • the conditional reconfiguration may be related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell.
  • the wireless device may receive, from a network, a conditional reconfiguration only for a conditional handover for a PCell without a conditional PSCell addition or change for a PSCell.
  • the conditional reconfiguration may be related to a candidate PCell.
  • a wireless device may perform the conditional mobility for the candidate PCell and the candidate PSCell.
  • the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility may include (i) a candidate PCell satisfying an execution condition for the candidate PCell and (ii) a PSCell related to the candidate PCell satisfying an execution condition for the candidate PSCell.
  • conditional mobility for the candidate PCell and the candidate PSCell may include (i) a conditional handover for the candidate PCell and (ii) a conditional PSCell addition or change for the candidate PSCell.
  • the wireless device may prioritize a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility over at least one conditional mobility configuration related to a single candidate PCell or a single candidate PSCell.
  • the wireless device may select a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility among multiple conditional mobility configurations.
  • the wireless device may apply a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility.
  • a wireless device may perform the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • the wireless device may be in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
  • UE selects one CHO configuration to execute based on whether the CHO configuration is "CHO with CPAC" or "CHO without CPAC".
  • UE prioritizes the "CHO with CPAC” over the "CHO without CPAC", i.e., deprioritizes the "CHO without CPAC".
  • UE selects one CHO configuration to execute among prioritized CHO configurations.
  • CHO with CPAC configuration consists of candidate PCell configuration, CHO condition, candidate PSCell configuration, and CPAC (i.e., CPA or CPC) condition.
  • the execution condition of the CHO with CPAC consists of CHO condition and CPAC condition. UE considers the execution condition is met only when both CHO condition and CPAC condition are met. If both CHO condition and CPAC condition indicated in the CHO with CPAC configuration are met, the UE executes the CHO and CPAC in accordance with the CHO with CPAC configuration. If CHO condition in the CHO with CPAC configuration is met but CPAC condition in the CHO with CPAC configuration is not met, UE takes no action with regard to the CHO with CPAC configuration, i.e., doesn't execute the CHO.
  • CHO without CPAC configuration includes CHO execution condition only and does not include CPAC execution condition.
  • the UE executes the CHO in accordance with the CHO without CPAC configuration.
  • UE prioritizes CHO with CPAC configurations over CHO without CPAC configuration.
  • 3-CHO configurations are configured as follow:
  • the UE prioritizes the CHO configuration #2 and #3 over #1. That is, UE selects one between CHO configuration #2 and #3 to execute.
  • the candidate PSCell priority can be considered to select one CHO configuration. If the priority of each candidate PSCell is configured by network, UE selects a CHO with CPAC configuration associated with the highest priority.
  • Different candidate PCell may have different priority. If the first execution condition of CHO for the first candidate PCell and the second execution condition of CHO for the second candidate PCell are met at the same time, the UE selects one CHO configuration associated with the highest candidate PCell priority among CHO configurations for which the corresponding execution condition is met, and executes CHO according to the selected CHO configuration.
  • UE selects one CHO configuration to execute based on whether the CHO configuration is CHO with CPAC or CHO without CPAC.
  • FIG. 13 shows an example for prioritization of conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 13 shows an example of a method performed by a UE in a wireless communication system.
  • step S1301 UE may receive CHO configuration from network.
  • UE receives a first conditional mobility configuration which is as follows:
  • the first conditional mobility configuration includes a configuration on a first candidate PCell and a first execution condition associated with the first candidate PCell.
  • the first conditional mobility configuration does not include execution condition for PSCell.
  • the first conditional mobility configuration may or may include a configuration on candidate PSCell.
  • the UE executes the conditional mobility according to the first conditional mobility configuration, i.e. applies the configuration on the first candidate PCell and the candidate PSCell, if configured.
  • the execution condition associated with the first candidate PCell may be condEvent A3, condEvent A4 or condEvent A5.
  • UE receives a second conditional mobility configuration which is as follows:
  • the second conditional mobility configuration includes a configuration on the first candidate PCell and a candidate PSCell, and a second execution condition associated with the first candidate PCell and the candidate PSCell.
  • the second execution condition consists of an execution condition associated with the first candidate PCell and an execution condition associated with the candidate PSCell. UE considers the second execution condition is met, if both the execution condition associated with the first candidate PCell and the execution condition associated with the candidate PSCell are met.
  • the UE executes the conditional mobility according to the second conditional mobility configuration, i.e. applies the configuration on the first candidate PCell and the candidate PSCell.
  • the execution condition associated with the first candidate PCell may be condEvent A3, condEvent A4 or condEvent A5.
  • the execution condition associated with the candidate PSCell may be condEvent A3, condEvent A4 or condEvent A5.
  • step S1302 UE may evaluate whether the configured execution condition is met or not.
  • UE performs measurements on the first candidate PCell and candidate PSCell. UE evaluates whether the first execution condition and the second execution condition are met based on the measurement results of the first candidate PCell and the candidate PSCell.
  • step S1303 UE may determine which CHO configuration to execute.
  • the UE executes the conditional mobility according to the first conditional mobility configuration. If the second execution condition is met first, the UE executes the conditional mobility according to the second conditional mobility configuration.
  • the UE executes the conditional mobility according to the second conditional mobility configuration.
  • UE applies the configuration on the first candidate PCell and the candidate PSCell included in the second conditional mobility configuration.
  • the UE prioritizes the second conditional mobility configuration over the first conditional mobility configuration.
  • conditional mobility configurations are prioritized, the UE selects one among them and executes conditional mobility according to the selected conditional mobility configuration.
  • FIG. 14 shows an example for prioritizing conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 14 shows an example of a method performed by a wireless device in a wireless communication system.
  • the wireless device may receive a first conditional mobility configuration including a configuration on a first candidate PCell and a first execution condition associated with the first candidate PCell.
  • the wireless device may receive a second conditional mobility configuration including a configuration on the first candidate PCell and a candidate PSCell, and a second execution condition associated with the first candidate PCell and the candidate PSCell.
  • the second execution condition consists of a condition associated with the first candidate PCell and a condition associated with the candidate PSCell.
  • step S1403 the wireless device may evaluate whether the first execution condition is met and evaluate whether the second execution condition is met.
  • step S1404 if the first execution condition and the second execution condition are met at the same time, the wireless device may execute the conditional mobility according to the second conditional mobility configuration.
  • the wireless device may apply the configuration on the first candidate PCell and the candidate PSCell in the second conditional mobility configuration.
  • FIG. 15 shows an example for handling conditional mobility configuration according to some embodiments of the present disclosure.
  • FIG. 15 shows an example of a method performed by a UE in a wireless communication system.
  • step S1501 the UE may receive a conditional reconfiguration from a network.
  • the network configures the UE with one or more candidate target SpCells in the conditional reconfiguration.
  • the UE evaluates the condition of each configured candidate target SpCell.
  • the UE applies the conditional reconfiguration associated with one of the target SpCells which fulfils associated execution condition.
  • the network can also configure the UE with one or more candidate target PCells associated with one or more candidate target PSCells.
  • the UE evaluates the conditions for the candidate target PCells and the associated candidate target PSCells in parallel and applies a target configuration that include PCell and PSCell for which the associated execution conditions are fullfiled.
  • the network provides multiple conditional configurations for the same candidate target PCell, i.e., each configuration contains one MCG configuration (for the same candidate target PCell) and one SCG configuration (for one of the multiple associated candidate PSCells).
  • the network may also provide a complementary CHO only configuration, i.e., there is execution condition only for candidate PCell.
  • the network provides the configuration parameters for the target SpCell(s) in the condRRCReconfig .
  • the UE may receive two independent conditionalReconfiguration :
  • conditionalReconfiguration associated with MCG that is included in the RRCReconfiguration message received via SRB1;
  • conditionalReconfiguration associated with SCG, that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1.
  • the UE maintains two independent VarConditionalReconfig , one associated with each conditionalReconfiguration ;
  • the UE independently performs all the procedures for each conditionalReconfiguration and the associated VarConditionalReconfig , unless explicitly stated otherwise;
  • the UE performs the procedures in clause 5.5 for the VarConditionalReconfig associated with the same cell group like the measConfig .
  • the VarConditionalReconfig is associated with the SCG.
  • VarConditionalReconfig is associated with the MCG.
  • step S1502 the UE may evaluate the conditional reconfiguration.
  • the UE shall:
  • up to 2 MeasId can be configured for each condReconfigId , if condExecutionCondPSCell is not configured .
  • the conditional reconfiguration event of the 2 MeasId may have the same or different event conditions, triggering quantity, time to trigger, and triggering threshold.
  • up to 2 MeasId can be configured for condExecutionCond and up to 2 MeasId can be configured for condExecutionCondPSCell for each condReconfigId .
  • step S1503 the UE may execute the conditional reconfiguration.
  • the UE shall:
  • UE implementation which one to select, e.g. the UE considers beams and beam quality to select one of the triggered cells for execution.
  • conditional reconfiguration may be included in a radio resource control (RRC) reconfiguration message.
  • RRC radio resource control
  • the IE ConditionalReconfiguration is used to add, modify and release the configuration of conditional reconfiguration.
  • FIG. 16 shows an example of ConditionalReconfiguration information element.
  • the UE shall perform conditional reconfiguration if selected cell is a target candidate cell and it is the first cell selection after failure.
  • condReconfigToAddModList List of the configuration of candidate SpCells to be added or modified for CHO, CPA or CPC.
  • - securityCellSetId This field is used to determine whether UE should perform security update when conditional reconfiguration containing subsequentCondReconfig is executed.
  • servingSecurityCellSetId This field identifies the security cell set for serving PSCell.
  • - sk-counterConfiguration Includes a list of sk-Counter from which the UE should select the sk-counter used to derive S-KgNB for inter-SN subsequent CPAC. If this field is configured, the network shall not configure the field sk-Counter within the RRCReconfiguration message for conditional reconfiguration execution for subsequent CPAC.
  • the field is optional present, Need R, if the UE is configured with at least a candidate SpCell for CHO. Otherwise the field is not present.
  • the field is mandatory present upon the initial conditional reconfiguration, generated by the MN, which includes at least one inter-SN candidate PSCell supporting subsequent CPAC.
  • the field is absent for any conditional reconfiguration generated by the SN. Otherwise, the field is optional, need M.
  • FIG. 17 shows an example of CondReconfigToAddModList information element.
  • the IE CondReconfigToAddModList concerns a list of conditional reconfigurations to add or modify, with for each entry the condReconfigId and the associated fields.
  • the CondReconfigToAddModList may include information related to condReconfigId, condExecutionCond, condRRCReconfig, condRRCReconfig, condExecutionCondPSCell, and/or subsequentCondReconfig.
  • condExecutionCond The execution condition that needs to be fulfilled in order to trigger the execution of a conditional reconfiguration for CHO, CPA, intra-SN CPC without MN involvement, or MN initiated inter-SN CPC.
  • 2 triggering events Meas Ids
  • the network ensures that both refer to the same measObject.
  • the network configures at most one from condEventD1, condEventD2 or condEventT1 for the same candidate cell.
  • the network only indicates MeasId(s) associated with condEventA4.
  • intra-SN CPC the network only indicates MeasId(s) associated with condEventA3 or condEventA5.
  • condExecutionCondPSCell The execution condition that needs to be fulfilled for the associated PSCell in order to trigger the execution of a conditional reconfiguration for CHO with candidate SCG(s).
  • the Meas Ids refer to the measConfig associated with the MCG.
  • network ensures that both refer to the same measObject. The network only indicates MeasId(s) associated with condEventA4.
  • condExecutionCondSCG Contains execution condition that needs to be fulfilled in order to trigger the execution of a conditional reconfiguration for SN initiated inter-SN CPC.
  • the Meas Ids refer to the measConfig associated with the SCG.
  • 2 triggering events Meas Ids
  • the network ensures that both refer to the same measObject.
  • the network For each condReconfigId, the network always configures either condExecutionCond or condExecutionCondSCG (not both).
  • the network only indicates MeasId(s) associated with condEventA3 or condEventA5.
  • condRRCReconfig The RRCReconfiguration message to be applied when the condition(s) are fulfilled.
  • the RRCReconfiguration message contained in condRRCReconfig cannot contain the field conditionalReconfiguration or the field daps-Config.
  • - subsequentCondReconfig Contains the execution conditions that need to be fulfilled in order to trigger the execution of a subsequent CPAC. If the field is configured, the configuration of candidate PSCells for subsequent CPAC is supported. The subsequent execution condition is used for conditional reconfiguration evaluation for other candidate cells when the RRCReconfiguration message contained in condRRCReconfig has been applied.
  • - subsequentCondExecutionCondSCG Contains execution condition that needs to be fulfilled in order to trigger the execution of a conditional reconfiguration for SN initiated inter-SN subsequent CPAC, SN initiated intra-SN subsequent CPAC with MN involvement, or MN initiated inter-SN subsequent CPAC.
  • the Meas Ids refer to the measConfig associated with the SCG.
  • condReconfigAdd The field is mandatory present when a condReconfigId is being added. Otherwise the field is optional, need M.
  • the field is optionally present, need M, when the conditional reconfiguration includes at least one candidate PSCell supporting subsequent CPAC. Otherwise, the field is absent, need R.
  • the apparatus may be a wireless device (100 or 200) in FIGS. 2, 3, and 5.
  • a wireless device may perform methods described above.
  • the detailed description overlapping with the above-described contents could be simplified or omitted.
  • a wireless device 100 may include a processor 102, a memory 104, and a transceiver 106.
  • the processor 102 may be configured to be coupled operably with the memory 104 and the transceiver 106.
  • the wireless device may include at least one transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations.
  • the processor 102 may be adapted to control the transceiver 106 to receive information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary Secondary Cell Group (SCG) Cells (PSCells). Based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists, the processor 102 may be adapted to perform the conditional mobility for the candidate PCell and the candidate PSCell.
  • PCells Primary Cells
  • SCG Primary Secondary Cell Group
  • the processor 102 may be adapted to perform the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility may include (i) a candidate PCell satisfying an execution condition for the candidate PCell and (ii) a PSCell related to the candidate PCell satisfying an execution condition for the candidate PSCell.
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may be included in a radio resource control (RRC) reconfiguration message.
  • RRC radio resource control
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may include (i) information related to one or more execution conditions for the one or more candidate PCells and (ii) information related to one or more execution conditions for the one or more candidate PSCells.
  • the processor 102 may be adapted to evaluate a conditional reconfiguration related to the conditional mobility for one or more candidate PCells and one or more candidate PSCells.
  • the processor 102 may be adapted to perform measurements for the one or more candidate PCells and the one or more candidate PSCells.
  • conditional mobility for the candidate PCell and the candidate PSCell may include (i) a conditional handover for the candidate PCell and (ii) a conditional PSCell addition or change for the candidate PSCell.
  • the processor 102 may be adapted to prioritize a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility over at least one conditional mobility configuration related to a single candidate PCell or a single candidate PSCell.
  • the processor 102 may be adapted to select a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility among multiple conditional mobility configurations.
  • the processor 102 may be adapted to apply a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility.
  • the processor 102 may be adapted to control the transceiver 106 to receive, from a network, a conditional reconfiguration for a conditional handover for a PCell with a conditional PSCell addition or change for a PSCell.
  • the processor 102 may be adapted to control the transceiver 106 to receive, from a network, a conditional reconfiguration only for a conditional handover for a PCell without a conditional PSCell addition or change for a PSCell.
  • the processor 102 may be adapted to be in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
  • the processor may be adapted to control the wireless device to receive information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary Secondary Cell Group (SCG) Cells (PSCells). Based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists, the processor may be adapted to control the wireless device to perform the conditional mobility for the candidate PCell and the candidate PSCell.
  • PCells Primary Cells
  • SCG Primary Secondary Cell Group
  • the processor may be adapted to control the wireless device to perform the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility may include (i) a candidate PCell satisfying an execution condition for the candidate PCell and (ii) a PSCell related to the candidate PCell satisfying an execution condition for the candidate PSCell.
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may be included in a radio resource control (RRC) reconfiguration message.
  • RRC radio resource control
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may include (i) information related to one or more execution conditions for the one or more candidate PCells and (ii) information related to one or more execution conditions for the one or more candidate PSCells.
  • the processor may be adapted to control the wireless device to evaluate a conditional reconfiguration related to the conditional mobility for one or more candidate PCells and one or more candidate PSCells.
  • the processor may be adapted to control the wireless device to perform measurements for the one or more candidate PCells and the one or more candidate PSCells.
  • conditional mobility for the candidate PCell and the candidate PSCell may include (i) a conditional handover for the candidate PCell and (ii) a conditional PSCell addition or change for the candidate PSCell.
  • the processor may be adapted to control the wireless device to prioritize a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility over at least one conditional mobility configuration related to a single candidate PCell or a single candidate PSCell.
  • the processor may be adapted to control the wireless device to select a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility among multiple conditional mobility configurations.
  • the processor may be adapted to control the wireless device to apply a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility.
  • the processor may be adapted to control the wireless device to receive, from a network, a conditional reconfiguration for a conditional handover for a PCell with a conditional PSCell addition or change for a PSCell.
  • the processor may be adapted to control the wireless device to receive, from a network, a conditional reconfiguration only for a conditional handover for a PCell without a conditional PSCell addition or change for a PSCell.
  • the processor may be adapted to control the wireless device to be in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
  • non-transitory computer-readable medium has stored thereon a plurality of instructions for conditional mobility configuration in a wireless communication system, according to some embodiments of the present disclosure, will be described.
  • the technical features of the present disclosure could be embodied directly in hardware, in a software executed by a processor, or in a combination of the two.
  • a method performed by a wireless device in a wireless communication may be implemented in hardware, software, firmware, or any combination thereof.
  • a software may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other storage medium.
  • storage medium is coupled to the processor such that the processor can read information from the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the processor and the storage medium may reside as discrete components.
  • the computer-readable medium may include a tangible and non-transitory computer-readable storage medium.
  • 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.
  • RAM random access memory
  • SDRAM synchronous dynamic random access memory
  • ROM read-only memory
  • NVRAM non-volatile random access memory
  • EEPROM electrically erasable programmable read-only memory
  • FLASH memory magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures.
  • Non-transitory computer-readable media may also include combinations of the above.
  • the method described herein may be realized at least in part by a computer-readable communication medium that carries or communicates code in the form of instructions or data structures and that can be accessed, read, and/or executed by a computer.
  • a non-transitory computer-readable medium has stored thereon a plurality of instructions.
  • the stored a plurality of instructions may be executed by a processor of a wireless device.
  • the stored a plurality of instructions may cause the wireless device to receive information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary Secondary Cell Group (SCG) Cells (PSCells). Based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists, the stored a plurality of instructions may cause the wireless device to perform the conditional mobility for the candidate PCell and the candidate PSCell.
  • PCells Primary Cells
  • SCG Primary Secondary Cell Group
  • the stored a plurality of instructions may cause the wireless device to perform the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility may include (i) a candidate PCell satisfying an execution condition for the candidate PCell and (ii) a PSCell related to the candidate PCell satisfying an execution condition for the candidate PSCell.
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may be included in a radio resource control (RRC) reconfiguration message.
  • RRC radio resource control
  • the information related to conditional mobility for one or more candidate PCells and one or more candidate PSCells may include (i) information related to one or more execution conditions for the one or more candidate PCells and (ii) information related to one or more execution conditions for the one or more candidate PSCells.
  • the stored a plurality of instructions may cause the wireless device to evaluate a conditional reconfiguration related to the conditional mobility for one or more candidate PCells and one or more candidate PSCells.
  • the stored a plurality of instructions may cause the wireless device to perform measurements for the one or more candidate PCells and the one or more candidate PSCells.
  • conditional mobility for the candidate PCell and the candidate PSCell may include (i) a conditional handover for the candidate PCell and (ii) a conditional PSCell addition or change for the candidate PSCell.
  • the stored a plurality of instructions may cause the wireless device to prioritize a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility over at least one conditional mobility configuration related to a single candidate PCell or a single candidate PSCell.
  • the stored a plurality of instructions may cause the wireless device to select a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility among multiple conditional mobility configurations.
  • the stored a plurality of instructions may cause the wireless device to apply a conditional mobility configuration related to the pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility.
  • the stored a plurality of instructions may cause the wireless device to receive, from a network, a conditional reconfiguration for a conditional handover for a PCell with a conditional PSCell addition or change for a PSCell.
  • the stored a plurality of instructions may cause the wireless device to receive, from a network, a conditional reconfiguration only for a conditional handover for a PCell without a conditional PSCell addition or change for a PSCell.
  • the stored a plurality of instructions may cause the wireless device to be in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
  • BS base station
  • the BS may transmit, to a wireless device, information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary SCG Cells (PSCells). For example, based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists, the wireless device performs the conditional mobility for the candidate PCell and the candidate PSCell. For other example, based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility does not exist, the wireless device performs the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • PCells Primary Cells
  • PSCells Primary SCG Cells
  • BS base station
  • the BS may include a transceiver, a memory, and a processor operatively coupled to the transceiver and the memory.
  • the processor may be adapted to control the transceiver to transmit, to a wireless device, information related to conditional mobility for one or more candidate Primary Cells (PCells) and one or more candidate Primary SCG Cells (PSCells). For example, based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility exists, the wireless device performs the conditional mobility for the candidate PCell and the candidate PSCell. For other example, based on that a pair of a candidate PCell and a candidate PSCell related to the candidate PCell satisfying each execution condition for the conditional mobility does not exist, the wireless device performs the conditional mobility for a candidate PCell or a candidate PSCell which fulfills an execution condition.
  • PCells Primary Cells
  • PSCells Primary SCG Cells
  • the present disclosure can have various advantageous effects.
  • the wireless device could efficiently handle the conditional mobility configuration by prioritizing the CHO with CPAC over the CHO without CPAC.
  • the wireless device can use qualified SCG upon conditional handover by applying an SCG which satisfies the execution condition.
  • conditional mobility can be performed using the SCG configuration.
  • the wireless communication system could provide an efficient solution for handling the conditional mobility configuration.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de configuration de mobilité conditionnelle dans un système de communication sans fil. Le procédé mis en œuvre par un dispositif sans fil consiste à : recevoir des informations relatives à la mobilité conditionnelle pour une ou plusieurs PCells candidates et une ou plusieurs PSCells candidates ; sur la base du fait qu'une paire d'une PCell candidate et d'une PSCell candidate associée à la PCell candidate satisfaisant chaque condition d'exécution pour la mobilité conditionnelle existe : réaliser la mobilité conditionnelle pour la PCell candidate et la PSCell candidate ; et sur la base du fait qu'une paire d'une PCell candidate et d'une PSCell candidate associée à la PCell candidate satisfaisant chaque condition d'exécution pour la mobilité conditionnelle n'existe pas : réaliser la mobilité conditionnelle pour une PCell candidate ou une PSCell candidate qui remplit une condition d'exécution.
PCT/KR2024/007968 2023-06-12 2024-06-11 Procédé et appareil de configuration de mobilité conditionnelle dans un système de communication sans fil Pending WO2024258149A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230097891A1 (en) * 2020-04-09 2023-03-30 Zte Corporation System and method for mobility enhancements

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US20230097891A1 (en) * 2020-04-09 2023-03-30 Zte Corporation System and method for mobility enhancements

Non-Patent Citations (4)

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Title
CATT: "RRC running CR for CHO including target MCG and candidate SCGs", 3GPP DRAFT; R2-2304928, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 2, no. Incheon, Korea; 20230522 - 20230526, 12 May 2023 (2023-05-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052371381 *
HONGSUK KIM, LG ELECTRONICS: "Simultaneous Evaluation for CHO and CPAC", 3GPP DRAFT; R2-2306430; TYPE DISCUSSION; NR_MOB_ENH2-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Incheon, KR; 20230522 - 20230526, 12 May 2023 (2023-05-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052315642 *
WEIWEI WANG, SAMSUNG: "Considerations on CHO with CPA/CPC", 3GPP DRAFT; R2-2305010; TYPE DISCUSSION; NR_MOB_ENH2-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Incheon, KR; 20230522 - 20230526, 12 May 2023 (2023-05-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052314236 *
YI GUO, INTEL CORPORATION: "Discussion on CHO including candidate SCGs", 3GPP DRAFT; R2-2302751; TYPE DISCUSSION; NR_MOB_ENH2-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20230417 - 20230426, 7 April 2023 (2023-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052289158 *

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