Method and device for operating radio resource in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates beyond a 4G communication system such as LTE. A method performed by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may comprise the operations of: transmitting, to a base station, medium access control (MAC) control elements (CEs) for activating cellular communication and radio resource sharing (RRS) between heterogeneous radio access technologies (RATs), the cellular communication and the RRS using the same band; receiving, from the base station, a radio resource control (RRC) reconfiguration message including a parameter set for the cellular communication and the RRS between the heterogeneous RATs; and transmitting an RRC reconfiguration complete message to the base station in response to the RRC reconfiguration message.

Description

Method and device for operating wireless resources in a wireless communication system

[0001] The present disclosure relates to a method for operating radio resources to support cellular communication and heterogeneous RAT (radio access technology) in a wireless communication system.

[0002] Looking back at the evolution of wireless communication over successive generations, technologies have primarily been developed for human-facing services such as voice, multimedia, and data. With the commercialization of 5G (5th-generation) communication systems, an explosive increase in connected devices is expected to be connected to communication networks. Examples of networked objects include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction equipment, and factory equipment. Mobile devices are expected to evolve into diverse form factors, including augmented reality glasses, virtual reality headsets, and holographic devices. In the 6th-generation (6G) era, efforts are being made to develop improved 6G communication systems to connect hundreds of billions of devices and objects and provide diverse services. For this reason, 6G communication systems are often referred to as "beyond 5G."

[0003] The 6G communication system, expected to be realized around 2030, will have a maximum transmission speed of terabytes per second (i.e., 1,000 gigabits per second) and a wireless latency of 100 microseconds (μsec). In other words, compared to 5G, the transmission speed in a 6G communication system will be 50 times faster, while the wireless latency will be reduced to one-tenth.

[0004] To achieve these high data rates and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz band (e.g., from 95 gigahertz (GHz) to 3 terahertz (THz)). Compared to the millimeter wave (mmWave) band introduced in 5G, the terahertz band is expected to experience more severe path loss and atmospheric absorption, making it more crucial to ensure signal reach, or coverage, in this band. Key technologies to ensure coverage include radio frequency (RF) components, antennas, new waveforms that offer better coverage than OFDM (orthogonal frequency division multiplexing), beamforming, and multiple antenna transmission technologies such as massive multiple-input and multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas. In addition, new technologies such as metamaterial-based lenses and antennas, high-dimensional spatial multiplexing using orbital angular momentum (OAM), and reconfigurable intelligent surfaces (RIS) are being discussed to improve the coverage of terahertz band signals.

[0005] In addition, in order to improve frequency efficiency and system network, 6G communication systems are developing full duplex technology that utilizes the same frequency resources at the same time for uplink and downlink; network technology that integrates satellites and high-altitude platform stations (HAPS); network structure innovation technology that supports mobile base stations and enables optimization and automation of network operation; dynamic spectrum sharing technology through collision avoidance based on spectrum usage prediction; AI-based communication technology that utilizes artificial intelligence (AI) from the design stage and internalizes end-to-end AI support functions to realize system optimization; and next-generation distributed computing technology that realizes services with complexity that exceeds the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources (mobile edge computing (MEC), cloud, etc.). In addition, efforts are being made to further strengthen connectivity between devices, further optimize networks, promote softwareization of network entities, and increase the openness of wireless communications through the design of new protocols to be used in 6G communication systems, the implementation of hardware-based security environments, the development of mechanisms for the safe use of data, and the development of technologies for maintaining privacy.

[0006] Research and development of these 6G communication systems are expected to enable a new level of hyper-connected experience (the next hyper-connected experience) through the hyper-connectivity of 6G communication systems, which encompass not only connections between things but also connections between people and things. Specifically, 6G communication systems are expected to enable services such as truly immersive extended reality (Truly Immersive XR), high-fidelity mobile holograms, and digital replicas. Furthermore, services such as remote surgery, industrial automation, and emergency response, which are provided through 6G communication systems through enhanced security and reliability, will find application in diverse fields such as industry, medicine, automobiles, and home appliances.

[0007] Meanwhile, the need for a method of operating radio resources to support cellular communication and heterogeneous radio access technology (RAT) in the same band is emerging.

[0008] The present disclosure proposes a method for enabling coexistence between cellular communication and heterogeneous radio access technology (RAT) in the same band.

[0009] According to one embodiment, a method of a user equipment (UE) in a wireless communication system may include: transmitting, to a base station, medium access control (MAC) control elements (CE) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band; receiving, from the base station, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT; and transmitting, to the base station, an RRC reconfiguration complete message in response to the RRC reconfiguration message.

[0010] According to one embodiment, a method of a base station in a wireless communication system may include receiving, from a user equipment (UE), medium access control (MAC) control elements (CE) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band; transmitting, to the UE, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT; and receiving, from the UE, an RRC reconfiguration complete message in response to the RRC reconfiguration message.

[0011] According to one embodiment, in a wireless communication system, a user equipment (UE) may include a transceiver; and a control unit. The control unit may control to transmit, to a base station, medium access control (MAC) control elements (CEs) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band, to receive, from the base station, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT, and to transmit, to the base station, an RRC reconfiguration complete message in response to the RRC reconfiguration message.

[0012] According to one embodiment, in a wireless communication system, a base station includes a transceiver; and a control unit. The control unit may receive, from a user equipment (UE), medium access control (MAC) control elements (CEs) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band, and control to transmit, to the UE, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT, and receive, in response to the RRC reconfiguration message, an RRC reconfiguration completion message from the UE.

[0013] The method and device according to the embodiment of the present disclosure can enable coexistence between cellular communication and heterogeneous radio access technology (RAT) in the same band.

[0014] The method and device according to the embodiment of the present disclosure can reduce power consumption without performance degradation when running an application having periodic uplink traffic characteristics.

[0015] FIG. 1 is a diagram illustrating the structure of a wireless communication system according to an embodiment of the present invention.

[0016] FIG. 2 is a diagram showing a wireless protocol structure in an LTE system according to an embodiment of the present invention.

[0017] FIG. 3 is a diagram showing a wireless protocol structure of a next-generation mobile communication system according to an embodiment of the present invention.

[0018] FIG. 4 illustrates an example of an environment in which communications using a licensed band and communications using an unlicensed band coexist according to an embodiment of the present invention.

[0019] FIG. 5 illustrates an example of a DRX method that can temporarily disable cellular communication according to an embodiment of the present invention.

[0020] FIG. 6 is a diagram for explaining the operation of a UE and a base station using DRX in cellular communication according to an embodiment of the present invention.

[0021] FIG. 7 is a diagram for explaining parameters defined for wireless resource sharing between heterogeneous RATs according to an embodiment of the present invention.

[0022] FIG. 8 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to one embodiment of the present invention.

[0023] FIG. 9 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0024] FIG. 10 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0025] FIG. 11 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0026] FIG. 12 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0027] FIG. 13 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0028] FIG. 14 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0029] FIG. 15 is a block diagram illustrating a UE according to embodiments of the present invention.

[0030] FIG. 16 is a block diagram illustrating a base station according to embodiments of the present invention.

[0031] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the attached drawings. It should be noted that, where possible, identical components are represented by identical reference numerals throughout the attached drawings. Furthermore, detailed descriptions of well-known functions and configurations that may obscure the gist of the present disclosure will be omitted.

[0032] In describing the embodiments in this specification, descriptions of technical details that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to avoid obscuring the gist of the present disclosure by omitting unnecessary explanations and to convey the gist more clearly.

[0033] For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted. Furthermore, the dimensions of each component do not entirely reflect its actual size. Identical or corresponding components in each drawing are assigned the same reference numbers.

[0034] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

[0035] At this time, it will be understood that each block of the processing flow diagrams and combinations of the flow diagrams can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flow diagram block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flow diagram block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0036] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0037] Here, the term '~ unit' used in the present embodiment means software or hardware components such as FPGA (field programmable gate array) or ASIC (application specific integrated circuit), and the '~ unit' performs certain roles. However, the '~ unit' is not limited to software or hardware. The '~ unit' may be configured to be on an addressable storage medium and may be configured to play one or more processors. Accordingly, as an example, the '~ unit' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. Additionally, components and '~parts' may be implemented to regenerate one or more CPUs within a device or secure multimedia card.

[0038] In embodiments of the present disclosure, a base station is an entity that performs resource allocation of a terminal, and may be at least one of a gNode B, a gNB, an eNode B, an eNB, a Node B, a BS, a radio access unit, a base station controller, or a node on a network. In addition, the base station may be a network entity including at least one of an IAB-donor (Integrated Access and Backhaul - donor), which is a gNB that provides network access to terminal(s) through a network of backhaul and access links in an NR system, and an IAB-node, which is a radio access network (RAN) node that supports NR access link(s) to the terminal(s) and supports NR backhaul links to the IAB-donor or another IAB-node. A terminal may be wirelessly connected through an IAB-node and may transmit and receive data with an IAB-donor connected to at least one IAB-node through a backhaul link.

[0039] In addition, the terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smartphone, a computer, or various devices capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although the LTE or LTE-A system may be described below as an example, the embodiments of the present disclosure may also be applied to other communication systems having a similar technical background or channel type. For example, the fifth generation mobile communication technology (5G, new radio, NR) or 6G developed after LTE-A may be included here, and the 5G or 6G below may also be a concept that includes existing LTE, LTE-A, and other similar services. In addition, the present disclosure may be applied to other communication systems with some modifications within a scope that does not significantly deviate from the scope of the present disclosure at the discretion of a person having skilled technical knowledge.

[0040] Terms used in the following description to refer to signals, channels, control information, network entities, and device components are provided for convenience of explanation. Furthermore, terms used in the following description to identify nodes, messages, interfaces between network entities, and various pieces of information are provided for convenience of explanation. Therefore, the present disclosure is not limited to the terms described below, and other terms having equivalent technical meanings may be used.

[0041] Additionally, while this disclosure describes various embodiments using terminology used in certain communication standards (e.g., 3rd Generation Partnership Project (3GPP)), these are merely illustrative examples. The various embodiments of this disclosure can be easily modified and applied to other communication systems.

[0042] FIG. 1 is a diagram illustrating the structure of a wireless communication system according to an embodiment of the present invention.

[0043] FIG. 1 illustrates an example in which a plurality of base stations and user equipment (UE) move and change the base station to which they are connected in a mobile communication system to which embodiments of the present invention are applied.

[0044] The base stations (1-20, 1-30) may be connected to some of the surrounding base stations, and the base stations (1-20, 1-30) may be connected to a mobile communication core network (CN: Core Network) (1-40) such as an Evolved Packet Core (EPC) or a 5G Core Network (5GC) or a 6G network.

[0045] The radio access technology of the base stations (1-20, 1-30) may be LTE, NR, Wi-Fi, 6G, etc., and is not limited to one example. For example, the base stations (1-20, 1-30) may be mobile communication base stations unrelated to the radio access technology.

[0046] A terminal (1-10) can receive mobile communication services by being connected to a base station, and as the terminal (1-10) moves, the base station to which it is connected can change, and through a handover (HO;: Handover, or handoff) procedure, the terminal (1-10) can receive mobile communication services without interruption. In one example of Fig. 1, the terminal (1-10) is connected to a base station (1-20), and then through a handover, the terminal can disconnect from the base station (1-20) and connect to a new base station (1-30).

[0047] FIG. 2 is a diagram showing a wireless protocol structure in an LTE system according to an embodiment of the present invention.

[0048] Referring to FIG. 2, the wireless protocol of the LTE system consists of PDCP (Packet Data Convergence Protocol 2-110, 2-210), RLC (Radio Link Control 2-120, 2-220), and MAC (Medium Access Control 2-130, 2-230) in the terminal (2-100) and the base station (2-200), respectively. The components of the wireless protocol may be referred to as layers, entities, or devices.

[0049] PDCP (Packet Data Convergence Protocol) (2-110, 2-210) is responsible for operations such as IP header compression / decompression. The main functions of PDCP are summarized as follows.

[0050] - Header compression and decompression (ROHC only)

[0051] - User data transfer function

[0052] - In-sequence delivery of upper layer PDUs at PDCP re-establishment procedure for RLC AM

[0053] - Order reordering function (For split bearers in DC (only support for RLC AM): PDCP PDU routing for transmission and PDCP PDU reordering for reception)

[0054] - Duplicate detection of lower layer service data units (SDUs) at PDCP re-establishment procedure for RLC AM

[0055] - Retransmission function (Retransmission of PDCP SDUs at handover and, for split bearers in DC, of ​​PDCP PDUs at PDCP data-recovery procedure, for RLC AM)

[0056] - Encryption and decryption functions (Ciphering and deciphering)

[0057] - Timer-based SDU discard in uplink.

[0058] Radio Link Control (RLC) (2-120, 2-220) reconfigures PDCP PDUs (Packet Data Units) to an appropriate size and performs ARQ operations, etc. The main functions of RLC are summarized as follows.

[0059] - Data transfer function (Transfer of upper layer PDUs)

[0060] - ARQ function (Error Correction through ARQ (only for AM data transfer))

[0061] - Concatenation, segmentation and reassembly of RLC SDUs (only for UM and AM data transfer)

[0062] - Re-segmentation of RLC data PDUs (only for AM data transfer)

[0063] - Reordering of RLC data PDUs (only for UM and AM data transfer)

[0064] - Duplicate detection (only for UM and AM data transfer)

[0065] - Error detection function (Protocol error detection (only for AM data transfer))

[0066] - RLC SDU discard function (RLC SDU discard (only for UM and AM data transfer))

[0067] - RLC re-establishment function

[0068] MAC (2-130, 2-230) connects to multiple RLC layer devices configured in a single terminal, and multiplexes RLC PDUs into MAC PDUs and demultiplexes RLC PDUs from MAC PDUs. The main functions of MAC are summarized as follows.

[0069] - Mapping function (Mapping between logical channels and transport channels)

[0070] - Multiplexing and demultiplexing function (Multiplexing / demultiplexing of MAC SDUs belonging to one or different logical channels into / from transport blocks (TB) delivered to / from the physical layer on transport channels)

[0071] - Scheduling information reporting function

[0072] - HARQ function (Error correction through HARQ)

[0073] - Priority handling between logical channels of one UE

[0074] - Priority handling between UEs by means of dynamic scheduling

[0075] - MBMS service identification function

[0076] - Transport format selection function

[0077] - Padding function

[0078] The physical layer (2-140, 2-240) performs the operation of channel coding and modulating upper layer data, converting it into OFDM symbols and transmitting it over a wireless channel, or demodulating OFDM symbols received over a wireless channel and performing channel decoding to transmit them to the upper layer.

[0079] FIG. 3 is a diagram showing a wireless protocol structure of a next-generation mobile communication system according to an embodiment of the present invention.

[0080] Referring to FIG. 3, the wireless protocol of the next-generation mobile communication system is composed of NR SDAP (service data application protocol) (3-110, 3-210), NR PDCP (3-120, 3-220), NR RLC (3-130, 3-230), and NR MAC (3-140, 3-240) in the terminal (3-100) and the NR base station (3-200), respectively. The components of the wireless protocol may be referred to as layers, entities, or devices.

[0081] Key features of NR SDAP (3-110, 3-210) may include some of the following:

[0082] - Transfer of user plane data

[0083] - Mapping function between QoS flow and data bearer for both DL and UL

[0084] - QoS flow ID marking function for both uplink and downlink (marking QoS flow ID in both DL and UL packets)

[0085] - Ability to map relective QoS flow to data bearer for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0086] For the above SDAP layer device, the terminal can be configured by an RRC (radio resource control) message for each PDCP layer device, each bearer, or each logical channel, whether to use the header of the SDAP layer device or whether to use the function of the SDAP layer device, and when the SDAP header is configured, the terminal can be instructed to update or reset the QoS flow of the uplink and downlink and the mapping information for the data bearer by a 1-bit indicator for NAS QoS reflection configuration (NAS reflective QoS) and a 1-bit indicator for AS QoS reflection configuration (AS reflective QoS) in the SDAP header. The SDAP header can include QoS flow ID information indicating QoS. The QoS information can be used as data processing priority, scheduling information, etc. to support a smooth service.

[0087] The main functions of NR PDCP (3-120, 3-220) may include some of the following functions:

[0088] Header compression and decompression (ROHC only)

[0089] - User data transfer function

[0090] - In-sequence delivery of upper layer PDUs

[0091] - Out-of-sequence delivery of upper layer PDUs

[0092] - PDCP PDU reordering for reception

[0093] - Duplicate detection of lower layer SDUs

[0094] - Retransmission function (Retransmission of PDCP SDUs)

[0095] - Encryption and decryption functions (Ciphering and deciphering)

[0096] - Timer-based SDU discard in uplink.

[0097] The reordering function of the NR PDCP device above refers to a function of reordering PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number), and may include a function of transmitting data to an upper layer in the reordered order, or may include a function of transmitting data directly without considering the order, may include a function of recording lost PDCP PDUs by reordering the order, may include a function of performing a status report on lost PDCP PDUs to the transmitting side, and may include a function of requesting retransmission of lost PDCP PDUs.

[0098] Key features of NR RLC (3-130, 3-230) may include some of the following:

[0099] - Data transfer function (Transfer of upper layer PDUs)

[0100] - In-sequence delivery of upper layer PDUs

[0101] - Out-of-sequence delivery of upper layer PDUs

[0102] - ARQ function (Error Correction through ARQ)

[0103] - Concatenation, segmentation and reassembly of RLC SDUs

[0104] - Re-segmentation of RLC data PDUs

[0105] - Reordering of RLC data PDUs

[0106] - Duplicate detection function

[0107] - Protocol error detection

[0108] - RLC SDU discard function

[0109] - RLC re-establishment function

[0110] The in-sequence delivery function of the NR RLC device above refers to the function of sequentially transmitting RLC SDUs received from a lower layer to an upper layer, and may include a function of reassembling and transmitting RLC SDUs when an RLC SDU is originally received divided into multiple RLC SDUs, may include a function of reordering received RLC PDUs based on RLC SN (sequence number) or PDCP SN (sequence number), may include a function of recording lost RLC PDUs by reordering the sequence, may include a function of performing a status report on lost RLC PDUs to the transmitting side, may include a function of requesting retransmission of lost RLC PDUs, may include a function of sequentially transmitting only RLC SDUs up to the lost RLC SDU to an upper layer when there is a lost RLC SDU, or may include a function of sequentially transmitting all RLC SDUs received before the timer starts when a predetermined timer expires even when there is a lost RLC SDU. or, if a predetermined timer has expired, even if there are lost RLC SDUs, it may include a function to sequentially deliver all RLC SDUs received up to the upper layer.

[0111] In addition, the RLC PDUs may be processed in the order in which they are received (in the order of arrival, regardless of the order of the sequence number, SN) and delivered to the PDCP device out of order (out-of-sequence delivery). In addition, if the received RLC PDU is a segment, the segments stored in the buffer or to be received later may be received, reconstructed into a single complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and the function may be performed in the NR MAC layer or replaced with a multiplexing function of the NR MAC layer.

[0112] The out-of-sequence delivery function of the NR RLC device above refers to the function of directly delivering RLC SDUs received from a lower layer to an upper layer regardless of the order, and may include a function of reassembling and delivering RLC SDUs when an original RLC SDU is received divided into multiple RLC SDUs, and may include a function of storing and arranging the RLC SN or PDCP SN of received RLC PDUs to record lost RLC PDUs.

[0113] NR MAC (3-140, 3-240) can be connected to multiple NR RLC layer devices configured in one terminal, and the main functions of NR MAC can include some of the following functions.

[0114] - Mapping function (Mapping between logical channels and transport channels)

[0115] - Multiplexing / demultiplexing of MAC SDUs

[0116] - Scheduling information reporting function

[0117] - HARQ function (Error correction through HARQ)

[0118] - Priority handling between logical channels of one UE

[0119] - Priority handling between UEs by means of dynamic scheduling

[0120] - MBMS service identification function

[0121] - Transport format selection function

[0122] - Padding function

[0123] The NR PHY layer (3-150, 3-250) can perform operations such as channel coding and modulating upper layer data, converting it into OFDM symbols and transmitting it over a wireless channel, or demodulating OFDM symbols received over a wireless channel and performing channel decoding to transmit them to a higher layer.

[0124] Recently, the UK's Office of Communications (Ofcom) has begun a movement to designate certain unlicensed bands (for example, the 1.2 GHz band from 5.925 GHz to 7.125 GHz) as licensed bands in certain areas. This is intended to supplement the existing insufficient cellular bands and support broadband communications. Since these bands overlap with channels used by other wireless communication technologies such as Wi-Fi 6E and UWB (Ultra-Wide Band), cellular communications will need to coexist with them. For example, the 6 GHz band could be licensed and allocated to cellular operators. For example, the 6 GHz band could be allocated as a licensed band only in certain cities / areas (e.g., downtown), and the 6 GHz licensed band could be set to be used only outdoors.

[0125] FIG. 4 illustrates an example of an environment in which communications using a licensed band and communications using an unlicensed band coexist according to an embodiment of the present invention.

[0126] Referring to FIG. 4, a wireless communication system (400) may include a Cellular-over-Wi-Fi region (410) that operates a specific band (e.g., 6 GHz) as a licensed band, an Unlicensed region (420) in which cellular cannot access a specific band (e.g., 6 GHz) and Wi-Fi and UWB communications are available, and a Coexistence region (430) in which cellular, Wi-Fi, and UWB communications can all coexist in a specific band (e.g., 6 GHz).

[0127] The Cellular-over-Wi-Fi area (410) allows wireless technologies such as Wi-Fi communication and UWB communication to be used only indoors, and unlike existing LTE-U and NR-U in cellular communication, electronic devices can access wireless resources without requiring LBT (Listen-Before-Talk).

[0128] The coexistence area (430) (or gray zone) can be a place where cellular communication, Wi-Fi communication, and UWB communication can all coexist, but when using cellular communication, electronic devices can access wireless resources by performing LBT in the same way as existing LTE-U and NR-U.

[0129] Meanwhile, the terminal (or electronic device) may perform a Wi-Fi scan periodically (e.g., every 800 milliseconds out of 4 seconds) to support multimedia services. However, to maximize internal antenna space, the terminal may perform cellular communication or Wi-Fi communication through an antenna covering the 5 to 8.25 GHz band. In this case, the terminal cannot perform cellular communication and Wi-Fi communication simultaneously, and since UWB communication also uses the same band, simultaneous use may not be possible to avoid internal interference within the terminal.

[0130] For a terminal (or electronic device) to operate multiple radio access technologies (RATs) simultaneously, flexible switching and operation policies between the multiple RATs are required. In particular, operations such as Wi-Fi scanning and UWB ranging must be performed with high priority for the convenience of terminal users. Therefore, temporary deactivation of cellular communication may be required during these operations.

[0131] Flexible antenna usage policies within terminals (or electronic devices) may be required in the 5-8 GHz band. For example, while a terminal is performing Wi-Fi scanning or UWB ranging in the 5-7 GHz band, cellular communication in the 6 GHz band may be unavailable. In this case, a method is needed to (dis)enable cellular communication in the 6 GHz band upon terminal request.

[0132] In one embodiment, a terminal may be configured with Discontinuous Reception (DRX) to temporarily disable wireless usage in a cellular network. In one embodiment, the terminal may perform heterogeneous RAT communication through RAT switching during a period other than the drx-onDuration period.

[0133] FIG. 5 illustrates an example of a DRX method that can temporarily disable cellular communication according to an embodiment of the present invention.

[0134] In FIG. 5, a terminal (or electronic device) can utilize DRX (Discontinuous Reception) technology as a method for temporarily disabling cellular communication. DRX may refer to a function in which a terminal periodically checks whether there is a Physical Downlink Control Channel (PDCCH) transmitted (or assigned) to itself, performs communication if there is a PDCCH transmitted (or assigned) to itself, and disables wireless communication and enters a low-power mode if there is no PDCCH.

[0135] Referring to FIG. 5, drx-SlotOffset, drx-onDurationTimer, drx-InactivityTimer, and offDuration can be set periodically according to the DRX cycle.

[0136] drx-SlotOffset can indicate at which slot in each DRX cycle drx-onDurationTimer will start.

[0137] In drx-onDurationTimer, the terminal can turn on the radio and check for the presence of a PDCCH. If the PDCCH is not present in drx-onDurationTimer, the terminal can disable the radio and enter low-power mode immediately after drx-onDurationTimer ends.

[0138] If the drx-onDurationTimer checks that a PDCCH exists, the terminal can receive control information within the PDCCH and check whether there is data scheduled to be transmitted to it during the drx-InactivityTimer period. If there is data scheduled for it, the terminal receives the data. If there is no data scheduled, the terminal can wait until the drx-InactivityTimer ends, disable the radio, and enter low-power mode.

[0139] According to one embodiment, the terminal may generate and / or transmit an RRC UE Assistance Information message including DRX preference values ​​as shown in Table 1 below to inform the base station of the DRX parameter values ​​(onDuration, offDuration, LongCycle, etc.) desired by the terminal.

[0140] DRX-Preference ::= SEQUENCE { preferredDRX-InactivityTimer ENUMERATED { ms0, ms1, ms2, ms3, ms4, ms5, ms6, ms8, ms10, ms20, ms30, ms40, ms50, ms60, ms80, ms100, ms200, ms300, ms500, ms750, ms1280, ms1920, ms2560, spare9, spare8, spare7, spare6, spare5, spare4, spare3, spare2, spare1} OPTIONAL, preferredDRX-LongCycle ENUMERATED { ms10, ms20, ms32, ms40, ms60, ms64, ms70, ms80, ms128, ms160, ms256, ms320, ms512, ms640, ms1024, ms1280, ms2048, ms2560, ms5120, ms10240, spare12, spare11, spare10, spare9, spare8, spare7, spare6, spare5, spare4, spare3, spare2, spare1} OPTIONAL, preferredDRX-ShortCycle ENUMERATED { ms2, ms3, ms4, ms5, ms6, ms7, ms8, ms10, ms14, ms16, ms20, ms30, ms32, ms35, ms40, ms64, ms80, ms128, ms160, ms256, ms320, ms512, ms640, spare9, spare8, spare7, spare6, spare5, spare4, spare3, spare2, spare1} OPTIONAL, preferredDRX-ShortCycleTimer INTEGER (1..16) OPTIONAL}

[0141] In one embodiment, the terminal can set the radio interval required for Wi-Fi scanning or UWB scanning as the offDuration of DRX. In this case, while the cellular device temporarily enters DRX mode (radio disabled), the terminal can perform Wi-Fi or UWB operations in the same band without interference, and the cellular device can also maintain the connection without RLF (Radio Link Failure).

[0142] FIG. 6 is a diagram for explaining the operation of a UE and a base station using DRX in cellular communication according to an embodiment of the present invention.

[0143] Referring to FIG. 6, in operation 601, the UE (610) can transmit and / or receive packet data to and from the MAC layer (650) of the base station (eNB or gNB) (640) through the MAC layer (630).

[0144] In operation 603, the UE (610) may transmit UE assistance information to the RRC layer (660) of the base station (640) through the RRC (radio resource control) layer (620). In operation 605, the base station (640) may transmit an RRC Reconfiguration message including parameters regarding DRX-preference to the RRC layer (620) of the UE (610) through the RRC layer (660).

[0145] However, the base station (640) does not necessarily need to use the parameters transmitted as UE assistance information, and even if there is a Wi-Fi scan or UWB scan time period desired by the UE (610), the base station (640) may not be able to guarantee it. If the offDuration period of the DRX desired by the UE (610) and the offDuration period of the DRX indicated by the base station (640) do not match, communication problems may occur due to strong interference between cellular communication and communication of different RATs overlapping, and unusable antennas.

[0146] In addition, although the number of times that a Wi-Fi scan or UWB scan must be repeatedly performed can be set, DRX cannot take this number into account, so additional overhead may occur in which the UE (610) must later transmit UE Assistance information to the base station (640) to request DRX parameter reset. Even if the UE (610) transmits UE Assistance information, the base station (640) may not perform DRX reset using the UE Assistance information value as is.

[0147] In operation 607, the UE (610) may transmit a MAC Reconfiguration message to the MAC layer (620) through the RRC layer (620). According to one embodiment, the UE (610) may share radios between different RATs.

[0148] In operation 609, the base station (640) may transmit an RRC Reconfiguration message including release information (releaseDRX-preferenceConfig) for DRX preference settings to the RRC layer (620) of the UE (610) through the RRC layer (660).

[0149] In operation 611, the UE (610) can transmit a MAC Reconfiguration message to the MAC layer (630) through the RRC layer (620).

[0150] In operation 613, the UE (610) can transmit and / or receive packet data to and from the MAC layer (650) of the base station (640) through the MAC layer (630).

[0151] In operation 615, the UE (610) may transmit UE Assistance information to the RRC layer (660) of the base station (640) through the RRC layer (620). In operation 617, the base station (640) may transmit an RRC Reconfiguration message including parameters regarding DRX-preference to the RRC layer (620) of the UE (610) through the RRC layer (660).

[0152] In operation 619, the UE (610) may transmit a MAC Reconfiguration message to the MAC layer (630) through the RRC layer (620). According to one embodiment, the UE (610) may share radios between different RATs.

[0153] In operation 621, the UE (610) can receive scheduling information via PDCCH from the MAC layer (650) of the base station (640) via the MAC layer (630). In operation 623, the UE (610) can transmit and / or receive packet data to and from the MAC layer (650) of the base station (640) via the MAC layer (630).

[0154] The present invention proposes a method and procedure for flexibly operating cellular (LTE, 5G, 6G) and heterogeneous RATs using the same band. By guaranteeing a terminal's cellular inactivity period, which DRX cannot guarantee, the terminal can provide services using other heterogeneous RATs within the guaranteed period. Furthermore, it can be utilized as a free DRX concept that allows the terminal to request and receive guarantees, which can be utilized for terminal energy conservation and heat control.

[0155] The present invention provides a definition of an Inter-RAT RRS MAC CE including an RRS parameter set and an RRC Connection Reconfiguration message including an RRS parameter set, and a T timer for managing time related to RRS, in order to flexibly operate radio resource sharing (RRS) between cellular and heterogeneous RATs using the same band (new frequency bands such as 6 GHz and FR6). RRS , T PROHIBIT We propose a signaling procedure utilizing the definition, the above message and the timer.

[0156] The method according to embodiments of the present invention can guarantee an inactive period of a terminal that could not be guaranteed in DRX, and the terminal can perform Wi-Fi Scan, UWB ranging, etc. in a specific band (e.g., 6 GHz band) within the guaranteed period. The method according to embodiments of the present invention can support free DRX requested from the UE side.

[0157] FIG. 7 is a diagram for explaining parameters defined for wireless resource sharing between heterogeneous RATs according to an embodiment of the present invention.

[0158] Referring to FIG. 7, four parameters, rrs-startSubframe, rrs-onDurationTimer, rrs-offDurationTimer, and rrs-numberOfCycles, can be defined as an RRS parameter set for radio resource sharing (RRS) between heterogeneous RATs.

[0159] rrs-startSubframe indicates the first SFN (System Frame Number) where RRS operation is performed, and from this time, a total of rrs-numberOfCycles(=N) RRS cycles can start. At the starting slot of each cycle, the cellular radio is disabled for RRS during rrs-onDurationTimer, and the operation of a heterogeneous RAT can be activated. After that, RRS is disabled during rrs-offDurationTimer, and the cellular radio is enabled, so that communication can be performed. In other words, rrs-offDurationTimer is a full cellular communication period (ms) without RRS operation, rrs-onDurationTimer is a cellular communication disabled period for RRS operation, and rrs-numberOfCycles (= N) can be the number of times the RRS operation is performed.

[0160] The RRS parameter set can be included in an Inter-RAT RRS MAC CE or RRC Connection Reconfiguration message. In this case, in addition to the RRS parameter set, the typeNumber field can be included for RRS activation / modification / deactivation. For example, a typeNumber of 0 can indicate RRS activation, 1 can indicate RRS parameter set modification, and 2 can indicate RRS deactivation.

[0161] When the RRS parameter set is included in an RRC message, it can be encoded using the ASN.1 format, and can be configured as shown in Table 2 below.

[0162] rrs-Preference ::= SEQUENCE {typeNumber INTEGER(0..2), rrs-startSfn INTEGER(0..1023), rrs-offDurationTimer INTEGER(1..20000), / milliseconds rrs-onDurationTimer INTEGER(1..20000), / milliseconds rrs-numberOfCycles INTEGER (0..256)}

[0163] According to one embodiment, a timer T that prevents the terminal from retransmitting Inter-RAT RRS Activation MAC CE as an RRC Timer PROHIBIT can be set.

[0164] According to one embodiment, a timer T for measuring the end time of heterogeneous RAT use at the base station as an RRC Timer (for RRC Reconfig. transmission for new DRX configuration, etc.) RRS can be set. According to one embodiment, the base station is T RRS PDSCH scheduling for the UE may not be performed during rrs-onDurationTimer until just before expiration.

[0165] In one embodiment, the MAC timer T RRSWAIT can be set. In one embodiment, when transmitting an ANT Sharing Notification, T RRSWAIT may be initiated. In one embodiment, if MAC receives the intended MAC configuration from RRC, T RRSWAIT may be interrupted. In one embodiment, T RRSWAITUpon expiration, transmission failure is determined and inter-RAT RRS (radio resource sharing) activation MAC CE may be retransmitted. In one embodiment, T RRSWAIT During operation, the API (Application Programming Interface) for a request to use a heterogeneous RAT may be ignored (to prevent retransmission) even if it is directed to the MAC.

[0166] In one embodiment, when a terminal transmits a MAC CE message to a base station, T PROHIBIT You can start the timer. T PROHIBIT If the timer is running, the terminal may not retransmit the Inter-RAT RRS Activation MAC CE. If the terminal receives the RRC Connection Reconfiguration message from the base station, the terminal may retransmit the T PROHIBIT You can stop the timer. If T PROHIBIT When the timer expires, the terminal may retransmit the MAC CE to the base station.

[0167] In one embodiment, a higher-level framework (e.g., an Android framework) of a terminal may request an RRS from a CP (Cellular Processor) within the terminal for Wi-Fi or UWB scanning, etc. The CP may be a processor for cellular communication. For example, the CP may be implemented as a cellular modem. The higher-level framework may be implemented within an AP (Application Processor) of the terminal. In one embodiment, the CP of the terminal may request the MAC layer of the terminal to transmit an RRS MAC CE.

[0168] FIG. 8 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to one embodiment of the present invention.

[0169] Referring to FIG. 8, in operation 801, the UE (810) may transmit and / or receive packet data to and from the MAC layer (850) of the base station (eNB or gNB) (840) via the MAC layer (830). In operation 803, the UE (810) may transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (850) of the base station (840) via the MAC layer (830).

[0170] In operation 805, the UE (810) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (820) through the MAC layer (830). At this time, the MAC layer (830) may transmit T RRSWAIT is started, and T in the RRC layer (820) PROHIBIT can begin.

[0171] In operation 807, the base station (840) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (860) through the MAC layer (850). In operation 809, the base station (840) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (850) through the RRC layer (860).

[0172] In operation 811, the base station (840) may transmit an RRCReconfiguration message including RRS parameters to the RRC layer (820) of the UE (810) through the RRC layer (860). For example, the RRCReconfiguration message may be configured as shown in Table 3.

[0173] rrs-Preference ::= SEQUENCE {typeNumber 0, rrs-startSfn 1, rrs-offDurationTimer 50, rrs-onDurationTimer 1950, rrs-numberOfCycles 3}

[0174] In operation 813, the UE (810) may transmit an RRCReconfigurationComplete message to the RRC layer (860) of the base station (840) through the RRC layer (820). In operation 815, the UE (810) may transmit a MAC Reconfiguration message to the MAC layer (830) through the RRC layer (820).

[0175] According to one embodiment, if the rrs-startSfn, rrs-offDurationTimer, rrs-onDurationTimer, and rrs-numberOfCycles received through the RRCReconfiguration message are equal to the values ​​included in the MAC CE of operation 803, the UE (810) sends T PROHIBIT T after stopping RRS can be started. According to one embodiment, the UE (810) can retransmit the MAC CE if the rrs-startSfn, rrs-offDurationTimer, rrs-onDurationTimer, and rrs-numberOfCycles received through the RRCReconfiguration message are different from the values ​​included in the MAC CE of operation 803.

[0176] In one embodiment, UE (810) is T RRS It can share radio resources with different RATs during the running time.

[0177] In operation 817, the base station (840) may transmit an RRCReconfiguration message to the RRC layer (820) of the UE (810) to clear RRS parameters through the RRC layer (860). For example, the RRCReconfiguration message may be configured as shown in Table 4.

[0178] rrs-Preference ::= SEQUENCE {typeNumber 2, rrs-startSfn 601, rrs-offDurationTimer 0, rrs-onDurationTimer 0, rrs-numberOfCycles 0}

[0179] In operation 819, the UE (810) may transmit an RRCReconfigurationComplete message to the RRC layer (860) of the base station (840) through the RRC layer (820). In operation 821, the UE (810) may transmit a MAC Reconfiguration message to the MAC layer (830) through the RRC layer (820). In operation 823, the UE (810) may transmit and / or receive packet data to and from the MAC layer (850) of the base station (840) through the MAC layer (830).

[0180] According to one embodiment, when the base station (840) receives an Inter RAT RRS MAC CE from the UE (810), it may forward it to the RRC layer (860). The RRC layer (860) generates an RRC Connection Reconfiguration message including the same parameter set as the parameter set included in the MAC CE and transmits it to the UE (810) while simultaneously sending T RRS You can start the timer. T RRSWhile the timer is running, the base station (840) may not perform PDSCH scheduling for the UE (810) during the RRS onDuration period to ensure a set RRS cycle for the UE (810).

[0181] In one embodiment, when the UE (810) receives an RRC Connection Reconfiguration message from the base station (840) including a parameter set that is identical to the RRS parameter set that the UE (810) transmitted, T RRS can start. According to one embodiment, if the parameter set included in the RRC Connection Reconfiguration message is different from the parameters desired by the UE (810), the UE (810) may initiate T RRS Retransmit the above Inter-RAT RRS MAC CE without starting the timer and T PROHIBIT You can start over by initializing it.

[0182] In one embodiment, UE (810) is T RRS The RRS operation must be continuously performed while the base station is in operation, and when the RRS operation must be stopped in the middle or the RRS parameter set such as the RRS cycle must be changed, an Inter RAT RRS MAC CE can be transmitted to the base station (840).

[0183] According to an embodiment, the UE (810) may transmit an Inter-RAT RRS activation MAC CE to the base station (840) through the MAC layer (830). The MAC CE message may include RRS parameter sets with typeNumber set to a preset value (e.g., 0). According to an embodiment, the MAC layer (830) of the UE (810) may transmit internal signaling (ANT Sharing Notification) to the RRC layer (820) so that the RRC layer (820) may receive T PROHIBITThe base station (840) can operate. After receiving the MAC CE, the base station (840) transmits the typeNumber and the RRS parameter set to the RRC layer (860) through internal signaling (RRS Allocation Request), and the RRC layer (860) can transmit an ACK (RRS Allocation ACK) to the MAC layer (850) through internal signaling.

[0184] According to one embodiment, the RRC layer (860) of the base station (840) may generate an RRC Connection Reconfiguration message by setting the received typeNumber and RRS parameter set as an rrs-Preference information element, and transmit the RRC Connection Reconfiguration message to the RRC layer (820) of the UE (810). Simultaneously with the transmission of the RRC Connection Reconfiguration message, the RRC layer (860) of the base station (840) may set T RRS can start.

[0185] In one embodiment, T RRS "T" means the total time to operate RRS. RRS = (rrs-offDurationTimer + rrs-onDurationTimer) * (rrs-numberOfCycles)". According to one embodiment, the UE (810) receives the RRC Connection Reconfiguration message and simultaneously sends T RRS The MAC layer (830) can be notified through internal signaling (MAC Reconfiguration) to perform RRS operation by setting the RRS parameter set. Through this, the MAC layer (830) can perform RRS operation according to the set RRS parameter set.

[0186] In one embodiment, T RRSWhen the RRC connection reconfiguration is terminated, the base station (840) may transmit an RRC Connection Reconfiguration message containing information for deactivating RRS to the UE (810). In the RRC Connection Reconfiguration message, typeNumber may be set to 2 and all RRS parameter sets may be set to 0. According to an embodiment, the UE (810) may transmit an ACK (RRC Reconfiguration Complete) message to the base station in response and terminate the RRS section.

[0187] FIG. 9 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0188] In FIG. 9, the UE (910) can register whether RRS can be used with the base station (940) using UECapabilityInformation at the time of initial connection.

[0189] Referring to FIG. 9, in operation 901, the base station (940) may transmit a UECapabilityEnquiry message including information about RRS support to the RRC layer (920) of the UE (910) via the RRC layer (960). According to one embodiment, after initial connection, the base station (940) may transmit a UECapabilityEnquiry message including UECapabilityEnquiry-rrs-IEs to the UE (910). For example, the UECapabilityEnquiry message may be configured as shown in Table 5 below.

[0190] UECapabilityEnquiry-rrs-IEs ::= SEQUENCE {rrs-Support ENUMERATED {enabled}, OPTIONAL}

[0191] In operation 903, the UE (910) may transmit UECapabilityInformation including information about RRS support to the RRC layer (960) of the base station (940) through the RRC layer (920). According to an embodiment, if the UE (910) supports RRS, the UE (910) may mark the rrs-Support field in the FeatureSetDownlink as supported to indicate UECapability

[0192] An information message can be transmitted to the base station (940). For example, the UECapabilityInformation can be configured as shown in Table 6 below.

[0193] FeatureSetDownlink ::= SEQUENCE {...rrs-Support ENUMERATED {supported}, OPTIONAL...}

[0194] In operation 905, the base station (940) may transmit an RRCReconfiguration message including Permission of use RRS MAC CE to the RRC layer (920) of the UE (910) via the RRC layer (960). According to an embodiment, the base station (940) may transmit the RRC Reconfiguration message to the UE (910) to permit the use of inter-RAT RRS MAC CE. For example, the RRCReconfiguration message may be configured as shown in Table 7 below.

[0195] RrsMacCePermission-IEs ::= SEQUENCE {...useRrsMacCe-Permit ENUMERATED {permitted}, OPTIONAL...}

[0196] In operation 907, the UE (910) may transmit an RRCReconfigurationComplete message to the RRC layer (960) of the base station (940) through the RRC layer (920).

[0197] In operation 909, the UE (910) may transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (950) of the base station (940) through the MAC layer (930). In operation 911, the base station (940) may transmit an Inter-RAT RRS (Radio Resource Sharing) Confirmation MAC CE to the MAC layer (930) of the UE (910) through the MAC layer (950).

[0198] Since each of operations 913 to 929 is substantially the same as each of operations 805 to 821 of FIG. 8 described above, a description thereof is omitted.

[0199] FIG. 10 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0200] Fig. 10 illustrates an embodiment in which a list of RRS parameters in preset form is notified to a base station (1040) in advance and RRS is activated with an option number.

[0201] Referring to FIG. 10, in operation 1001, the base station (1040) may transmit a UECapabilityEnquiry message including information about RRS support to the RRC layer (1020) of the UE (1010) through the RRC layer (1060). In operation 1003, the UE (1010) may transmit a UECapabilityInformation including information about RRS support to the RRC layer (1060) of the base station (1040) through the RRC layer (1020). According to an embodiment, the UECapabilityInformation message may include rrs-offDurationTimer, rrs-onDurationTimer, and rrs-numberOfCycles in the form of a preference list.

[0202] In operation 1005, the base station (1040) may transmit an RRCReconfiguration message including Permission of use RRS MAC CE to the RRC layer (1020) of the UE (1010) through the RRC layer (1060). For example, the RRCReconfiguration message may be configured as shown in Table 8 below.

[0203] RrsMacCePermission-IEs ::= SEQUENCE {useRrsMacCe-Permit ENUMERATED {permitted}, OPTIONALrrs-preferenceList INT (NumberOfPreferenceSet), OPTIONALrrs-preference1 SEQUENCE { rrs-offDurationTimer 1950, rrs-onDurationTimer 50, rrs-numberOfCycles 8}, OPTIONALrrs-preference2 SEQUENCE { rrs-offDurationTimer 1900, rrs-onDurationTimer 100, rrs-numberOfCycles 5}, OPTIONAL}

[0204] According to one embodiment, the UE (1010) may preset an RRS parameter set in FeatureSetDownlink and notify the base station (1040). For this purpose, an rrs-PreferenceList value indicating the number of preset RRS parameters may be added to the rrs-Support field above. Afterwards, RRS parameter set information may be added consecutively as many times as the rrs-PreferenceList value as rrs-Preference#. rrs-Preference# is composed of rrs-offDurationTimer, rrs-onDurationTimer, and rrs-numberOfCycle values.

[0205] In operation 1007, the UE (1010) may transmit an RRCReconfigurationComplete message to the RRC layer (1060) of the base station (1040) through the RRC layer (1020).

[0206] In operation 1009, the UE (1010) may transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (1050) of the base station (1040) through the MAC layer (1030). According to an embodiment, when the UE (1010) activates RRS with preset parameters, the UE may transmit typeNumber, rrs-startSfn, and preferenceList index. For example, the rrs-Preference transmitted by the UE (1010) may be configured as shown in Table 9 below.

[0207] rrs-Preference ::= SEQUENCE {typeNumber 0, rrs-startSfn 1,rrs-preference2}

[0208] In one embodiment, in a situation where an RRS preset is specified, the UE (1010) may transmit only the typeNumber, rrs-startSfn values ​​and the index (#) value of rrs-Preference through the Inter-RAT RRS MAC CE.

[0209] Since each of operations 1011 to 1021 is substantially the same as each of operations 805 to 815 of FIG. 8 described above, a description thereof is omitted.

[0210] In operation 1023, the base station (1040) may transmit an RRCReconfiguration message to the RRC layer (1020) of the UE (1010) to clear RRS parameters through the RRC layer (1060). For example, the RRCReconfiguration message may be configured as shown in Table 10.

[0211] rrs-Preference ::= SEQUENCE {typeNumber 2, rrs-startSfn 601,rrs-preference2}

[0212] According to one embodiment, the base station (1040) may map an RRS parameter set using the index value described in the corresponding MAC CE and insert it into an RRC Connection Reconfiguration message and transmit it to the UE (1010).

[0213] Since each of operations 1025 to 1029 is substantially the same as each of operations 819 to 823 of FIG. 8 described above, a description thereof is omitted.

[0214] FIG. 11 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0215] Referring to FIG. 11, in operation 1101, the UE (1110) can transmit and / or receive packet data to and from the MAC layer (1150) of the base station (eNB or gNB) (1140) via the MAC layer (1130). In operation 1103, the UE (1110) can transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (1150) of the base station (1140) via the MAC layer (1130).

[0216] In operation 1105, the UE (1110) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (1120) through the MAC layer (1130). At this time, the MAC layer (1130) may transmit T RRSWAIT is started, and T in the RRC layer (1120) PROHIBIT can begin.

[0217] In operation 1107, the base station (1140) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (1160) through the MAC layer (1150). In operation 1109, the base station (1140) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (1150) through the RRC layer (1160).

[0218] In operation 1111, the base station (1140) may transmit an RRCReconfiguration message including RRS parameters to the RRC layer (1120) of the UE (1110) through the RRC layer (1160). For example, the RRCReconfiguration message may include rrs-Preference of Table 11.

[0219] rrs-Preference ::= SEQUENCE {typeNumber 0, rrs-startSfn 1, rrs-offDurationTimer 50, rrs-onDurationTimer 1950, rrs-numberOfCycles 3}

[0220] In operation 1113, the UE (1110) may transmit an RRCReconfigurationComplete message to the RRC layer (1160) of the base station (1140) through the RRC layer (1120). In operation 1115, the UE (1110) may transmit a MAC Reconfiguration message to the MAC layer (1130) through the RRC layer (1120). For example, the RRCReconfiguration message may include rrs-Preference of Table 12.

[0221] In operations 1117 and 1119, the base station (1140) can simultaneously perform deactivation in L2 and L3 by piggybacking and transmitting an RRCReconfiguration message for clearing the Inter-RAT Radio Resource Sharing Deactivation MAC CE and RRS parameters. For example, the RRCReconfiguration message can include rrs-Preference of Table 12.

[0222] rrs-Preference ::= SEQUENCE {typeNumber 2, rrs-startSfn 601, rrs-offDurationTimer 0, rrs-onDurationTimer 0, rrs-numberOfCycles 0}

[0223] According to one embodiment, the base station (1140) can simultaneously transmit the MAC CE and the RRC Connection Reconfiguration message by piggybacking them within a single MAC PDU. According to one embodiment, the base station (1140) can control the MAC layer (1130) of the UE (1110) and the RRC layer (1120) of the UE (1110) to deactivate RRS simultaneously by transmitting a message with typeNumber=2 (deactivation) set to Inter-RAT RRS MAC CE and an RRC Connection Reconfiguration message by piggybacking them within a single MAC PDU. In this case, the procedure of the RRC layer (1120) of the UE (1110) performing MAC Reconfiguration can be eliminated, thereby reducing the processing load of the terminal.

[0224] In operation 1121, the UE (1110) may transmit an RRCReconfigurationComplete message to the RRC layer (1160) of the base station (1140) through the RRC layer (1120). In operation 1123, the UE (1110) may transmit and / or receive packet data to and from the MAC layer (1150) of the base station (1140) through the MAC layer (1130).

[0225] FIG. 12 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0226] In Fig. 12, if RRS parameter reset is required, UE (1210) RRS The Inter-RAT RRS Modification MAC CE can be transmitted to the base station (1240) during operation. When the Inter-RAT RRS Modification MAC CE is transmitted, the RRC layer (1220) of the UE (1210) is T PROHIBIT You can prevent the same message from being resent by setting .

[0227] Referring to FIG. 12, in operation 1201, the UE (1210) can transmit and / or receive packet data to and from the MAC layer (1250) of the base station (eNB or gNB) (1240) via the MAC layer (1230). In operation 1203, the UE (1210) can transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (1250) of the base station (1240) via the MAC layer (1230).

[0228] In operation 1205, the UE (1210) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (1220) through the MAC layer (1230). At this time, the MAC layer (1230) may transmit T RRSWAITis started, and T in the RRC layer (1220) PROHIBIT can begin.

[0229] In operation 1207, the base station (1240) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (1260) through the MAC layer (1250). In operation 1209, the base station (1240) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (1250) through the RRC layer (1260).

[0230] In operation 1211, the base station (1240) may transmit an RRCReconfiguration message including RRS parameters to the RRC layer (1220) of the UE (1210) through the RRC layer (1260). For example, the RRCReconfiguration message may include rrs-Preference information of Table 3.

[0231] rrs-Preference ::= SEQUENCE {typeNumber 0, rrs-startSfn 1, rrs-offDurationTimer 50, rrs-onDurationTimer 1950, rrs-numberOfCycles 3}

[0232] In operation 1213, the UE (1210) may transmit an RRCReconfigurationComplete message to the RRC layer (1260) of the base station (1240) through the RRC layer (1220). In operation 1215, the UE (1210) may transmit a MAC Reconfiguration message to the MAC layer (1230) through the RRC layer (1220). According to an embodiment, the UE (1210) may transmit a T RRS It can share radio resources with different RATs during the running time.

[0233] In operation 1217 and operation 1219, the UE (1210) may transmit and / or receive packet data to and from the MAC layer (1250) of the base station (1240) via the MAC layer (1230). In operation 1221, the UE (1210) may transmit an Inter-RAT Radio Resource Sharing Modification MAC CE to the MAC layer (1250) of the base station (1240) via the MAC layer (1230) when RRS parameter reconfiguration is required.

[0234] In operation 1223, the UE (1210) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (1220) through the MAC layer (1230). In operation 1225, the base station (1240) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (1260) through the MAC layer (1250). In operation 1227, the base station (1240) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (1250) through the RRC layer (1260).

[0235] In operation 1229, the base station (1240) may transmit an RRCReconfiguration message including new RRS parameters to the RRC layer (1220) of the UE (1210) through the RRC layer (1260). For example, the RRCReconfiguration message may include the rrs-Preference information of Table 14.

[0236] rrs-Preference ::= SEQUENCE {typeNumber 1, rrs-startSfn 301, rrs-offDurationTimer 100, rrs-onDurationTimer 1900, rrs-numberOfCycles 2}

[0237] In operation 1231, the UE (1210) may transmit an RRCReconfigurationComplete message to the RRC layer (1260) of the base station (1240) through the RRC layer (1220). In operation 1233, the UE (1210) may transmit a MAC Reconfiguration message to the MAC layer (1230) through the RRC layer (1220). According to an embodiment, the UE (1210) may transmit a T RRS It can share radio resources with different RATs during the running time.

[0238] In operations 1235, 1237, and 1239, the UE (1210) may transmit and / or receive packet data to and from the MAC layer (1250) of the base station (1240) via the MAC layer (1230).

[0239] In operation 1241, the base station (1240) may transmit an RRCReconfiguration message to the RRC layer (1220) of the UE (1210) to clear RRS parameters through the RRC layer (1260). For example, the RRCReconfiguration message may include the rrs-Preference information of Table 15.

[0240] rrs-Preference ::= SEQUENCE {typeNumber 2, rrs-startSfn 701, rrs-offDurationTimer 0, rrs-onDurationTimer 0, rrs-numberOfCycles 0}

[0241] In operation 1243, the UE (1210) may transmit an RRCReconfigurationComplete message to the RRC layer (1260) of the base station (1240) through the RRC layer (1220). In operation 1245, the UE (1210) may transmit a MAC Reconfiguration message to the MAC layer (1230) through the RRC layer (1220). In operation 1247, the UE (1210) may transmit and / or receive packet data to and from the MAC layer (1250) of the base station (1240) through the MAC layer (1230).

[0242] According to one embodiment, the UE (1210) and the base station (1240) are T RRS While performing RRS operation by setting up, UE (1210) may receive a request from a user for a service that requires the use of a third RAT that is not currently in use. In this case, UE (1210) may set typeNumber to 1 (modification) and then transmit Inter-RAT RRS MAC CE including the desired RRS parameter set.

[0243] According to one embodiment, when the base station (1240) receives an Inter-RAT RRS MAC CE of typeNumber 1, it may generate an RRC Connection Reconfiguration message using the RRS parameter set included in the MAC CE and transmit it to the UE (1210). When the UE (1210) receives the RRC Connection Reconfiguration message including the desired parameter set, it may generate an RRC parameter set, T RRS You can set up a new one and perform RRS operation.

[0244] FIG. 13 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0245] In Fig. 13, when a handover (HO) event occurs from a source base station (1340) to a target base station (1370) during RRS, initialization of the existing RRS parameter context settings may be required simultaneously with the occurrence of the HO. At this time, a new request for RRS Activation may be made to the target base station (1370).

[0246] Since each of operations 1301 to 1315 of FIG. 13 is substantially the same as operations 801 to 815 of FIG. 8, a description thereof is omitted.

[0247] Referring to FIG. 13, in operations 1317 and 1319, the UE (1310) may transmit and / or receive packet data to and from the MAC layer (1350) of the source base station (1340) via the MAC layer (1330).

[0248] In action 1321, UE (1310) is T RRS During operation, a measurement report can be transmitted to the RRC layer (1360) of the source base station (1340) through the RRC layer (1320).

[0249] In operation 1323, the source base station (1340) may transmit a handover request message (HandoverRequest) including UE RRS context to the RRC layer (1390) of the target base station (1380) through the RRC layer (1360). For example, the handover request message may include rrs-Preference information of Table 16.

[0250] rrs-Preference ::= SEQUENCE { rrs-offDurationTimer 50, rrs-onDurationTimer 1950, rrs-numberOfCycles 3}

[0251] In operation 1325, the target base station (1380) can transmit a handover request ACK message (HandoverRequest ACK) to the RRC layer (1360) of the source base station (1340) through the RRC layer (1390).

[0252] In operation 1327, the source base station (1340) may transmit an RRC connection reconfiguration (RRCConnReconfiguration) message including an HO command to the RRC layer (1320) of the UE (1310) through the RRC layer (1360). In operation 1329, the UE (1310) may transmit an RRC connection reconfiguration complete (RRCConnectionReconfiguration Complete) message to the RRC layer (1390) of the target base station (1380) through the RRC layer (1320). In operation 1331, the UE (1310) may transmit a MAC Reconfiguration message to the MAC layer (1330) through the RRC layer (1320).

[0253] In operation 1333, the UE (1310) may transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (1380) of the target base station (1370) through the MAC layer (1330).

[0254] In operation 1335, the UE (1310) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (1320) through the MAC layer (1330). At this time, the MAC layer (1330) may transmit T RRSWAIT is started, and T in the RRC layer (1320) PROHIBIT can begin.

[0255] In operation 1337, the target base station (1370) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (1390) through the MAC layer (1380). In operation 1339, the target base station (1370) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (1380) through the RRC layer (1390).

[0256] In operation 1341, the target base station (1370) may transmit an RRCReconfiguration message including RRS parameters to the RRC layer (1320) of the UE (1310) through the RRC layer (1390). For example, the RRCReconfiguration message may include the rrs-Preference information of Table 17.

[0257] rrs-Preference ::= SEQUENCE {typeNumber 0, rrs-startSfn 701, rrs-offDurationTimer 50, rrs-onDurationTimer 1950, rrs-numberOfCycles 3}

[0258] In operation 1343, the UE (1310) may transmit an RRCReconfigurationComplete message to the RRC layer (1390) of the target base station (1370) through the RRC layer (1320). In operation 1345, the UE (1310) may transmit a MAC Reconfiguration message to the MAC layer (1330) through the RRC layer (1320). In operation 1347, the UE (1310) may transmit and / or receive packet data to and from the MAC layer (1380) of the target base station (1370) through the MAC layer (1330).

[0259] According to one embodiment, when a handover is confirmed, the source base station (1340) may transmit a HandoverRequest message including the RRS parameter set of the previously used UE (1310) to the target base station (1370). According to one embodiment, when the source base station (1340) receives an ACK from the target base station (1370), the source base station (1340) may transmit an RRC Connection Reconfiguration message including the RRS parameter set with the RRS typeNumber set to 2 (deactivation) and the Handover Command to the UE (1310).

[0260] According to one embodiment, the UE (1310) may deactivate RRS and perform a handover to the target base station (1370) immediately after receiving the RRC Connection Reconfiguration message. After the handover is completed, the target base station (1370) may transmit an RRC Connection Reconfiguration including an RRS parameter set (received from the source base station (1340) through a HandoverRequest message) to the UE (1310). Upon receiving the RRC Connection Reconfiguration message, the UE (1310) may perform an RRS operation using the corresponding (or previously used) RRS parameter set.

[0261] FIG. 14 is a diagram for explaining the operation of a UE and a base station for sharing wireless resources between heterogeneous RATs according to another embodiment of the present invention.

[0262] Figure 14 illustrates a case where a cellular connection is maintained while ensuring the operation time (Wi-Fi Scan and / or UWB) of a heterogeneous RAT. In the present invention, T RRS PDSCH scheduling may not be performed at times when heterogeneous RAT operation is required during the interval.

[0263] Referring to FIG. 14, in operation 1401, the UE (1410) can transmit and / or receive packet data to and from the MAC layer (1470) of the base station (eNB or gNB) (1460) through the MAC layer (1450).

[0264] In operation 1403, the UE (1410) may transmit an Inter-RAT RRS (Radio Resource Sharing) Activation MAC CE to the MAC layer (1470) of the base station (1460) through the MAC layer (1450).

[0265] In operation 1405, the UE (1410) may transmit an antenna sharing notification message (ANT Sharing Notification) to the RRC layer (1440) through the MAC layer (1450). At this time, the MAC layer (1450) may transmit T RRSWAIT is started, and T in the RRC layer (1440) PROHIBIT can begin.

[0266] In operation 1407, the base station (1460) may transmit an RRS allocation request message (RRS Allocation Request) to the RRC layer (1480) through the MAC layer (1470). In operation 1409, the base station (1460) may transmit an RRS allocation ACK message (RRS Allocation ACK) to the MAC layer (1470) through the RRC layer (1480).

[0267] In operation 1411, the base station (1460) may transmit an RRCReconfiguration message including RRS parameters to the RRC layer (1440) of the UE (1410) through the RRC layer (1480). In operation 1413, the UE (1410) may transmit an RRCReconfigurationComplete message to the RRC layer (1480) of the base station (1460) through the RRC layer (1440). In operation 1415, the UE (1410) may transmit a MAC Reconfiguration message to the MAC layer (1450) through the RRC layer (1440).

[0268] In operations 1417, 1419, and 1421, the UE (1410) may transmit and / or receive packet data to and from the MAC layer (1470) of the base station (1460) via the MAC layer (1450).

[0269] In operation 1423, the UE (1410) may transmit a Probe Request through the Wi-Fi module (1430). In operation 1425, the UE (1410) may receive a Probe Response through the Wi-Fi module (1430).

[0270] In operation 1427, the UE (1410) may transmit an 802.15.4z Ranging Frame through the UWB module (1420). In operation 1429, the UE (1410) may receive an 802.15.4z Response Frame through the UWB module (1420). In operation 1431, the UE (1410) may receive a Ranging Frame through the UWB module (1420). In operation 1433, the UE (1410) may transmit a Response Frame through the UWB module (1420).

[0271] In operation 1435, the base station (1460) may transmit an RRCReconfiguration message to the RRC layer (1440) of the UE (1410) to clear RRS parameters through the RRC layer (1480).

[0272] In operation 1437, the UE (1410) may transmit an RRCReconfigurationComplete message to the RRC layer (1480) of the base station (1460) through the RRC layer (1440). In operation 1439, the UE (1410) may transmit a MAC Reconfiguration message to the MAC layer (1450) through the RRC layer (1440).

[0273] Through the present invention, cellular communication can maintain cellular connection without interruption while guaranteeing the operation time (Wi-Fi scan, UWB scan) of heterogeneous RAT using the same band. When operating heterogeneous RAT using existing DRX, Cellular RLF (Radio Link Failure) may occur, whereas the present invention can guarantee heterogeneous RAT operation without Cellular RLF. In addition, the existing DRX generates PDSCH scheduling, performs an additional inactivity timer, and may not enter DRX at an exact time, whereas the present invention can guarantee the operation of heterogeneous RAT by not performing PDSCH scheduling at a time when heterogeneous RAT operation is required.

[0274] FIG. 15 is a block diagram illustrating a UE according to embodiments of the present invention.

[0275] The UE of FIG. 15 may be implemented as the UE or terminal illustrated in FIGS. 1 to 14. Referring to FIG. 15, the UE may include a transceiver unit (1510), a memory (1520), and a control unit (1530).

[0276] The transceiver (1510) can transmit and receive signals with a base station, network device, or other terminal. The transceiver (1510) may also be referred to as a transceiver. The transceiver (1510) may include a transmitter and a receiver.

[0277] The memory (1520) can store at least one of information transmitted and received through the transceiver (1510) and information generated through the control unit (1530).

[0278] The control unit (1530) may be defined as a circuit or application-specific integrated circuit, or at least one processor. The control unit (1530) may control the overall operation of the UE or terminal according to the embodiments proposed in the present disclosure. For example, the control unit (1530) may control the signal flow between each block to perform operations according to the flowchart described above. Specifically, the control unit (1530) may control the operations of the UE or terminal, for example, as illustrated in FIGS. 1 to 14 .

[0279] According to one embodiment, the control unit (1530) may transmit, to the base station, medium access control (MAC) control elements (CE) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band. According to one embodiment, the control unit (1530) may receive, from the base station, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT. According to one embodiment, the control unit (1530) may transmit, to the base station, an RRC reconfiguration complete message in response to the RRC reconfiguration message.

[0280] According to one embodiment, the parameter set for the cellular communication and the RRS between the heterogeneous RAT may include at least one of an SFN (system frame number) at which a cycle of the RRS starts, information indicating a time period for the cellular communication to which the RRS is not applied (rrs-offDurationTimer), information indicating an inactive time period of the cellular communication for the RRS (rrs-onDurationTimer), and the number of times the RRS is performed.

[0281] According to one embodiment, the control unit (1530) sets a first timer (T) to prevent the UE from retransmitting the MAC CE. PROHIBIT ) can be started. According to one embodiment, the control unit (1530) starts the first timer (T) if the RRS parameter set included in the MAC CE is identical to the parameter set included in the RRC reconfiguration message. PROHIBIT ) and terminate the second timer (T) for the RRS. RRS ) can be started. According to one embodiment, if the RRS parameter set included in the MAC CE is different from the parameter set included in the RRC reconfiguration message, the control unit (1530) can retransmit the MAC CE to the base station for activating the RRS.

[0282] According to one embodiment, the control unit (1530) transmits an antenna sharing notification message (ANT Sharing Notification) from the MAC layer of the UE to the RRC layer through internal signaling of the UE, and then starts a third timer (T RRSWAIT ) can be started. According to one embodiment, the control unit (1530) may start a third timer (T RRSWAIT) is not received until the RRC reconfiguration message including the parameter set expires, the MAC CE for activating the RRS may be retransmitted to the base station. In one embodiment, the third timer (T RRSWAIT ) may be configured not to retransmit the MAC CE for activating the RRS until the UE expires.

[0283] According to one embodiment, the control unit (1530) may receive a first message (UECapabilityEnquiry) from the base station that inquires whether the UE supports the RRS. According to one embodiment, the control unit (1530) may transmit a second message (UECapabilityInformation) containing information regarding whether the UE supports the RRS to the base station.

[0284] According to one embodiment, the control unit (1530) may receive an RRC reconfiguration message from the base station for clearing the parameter set for the RRS.

[0285] According to one embodiment, the MAC CE for disabling the RRS and the RRC reconfiguration message for clearing the parameter set for the RRS may be piggybacked and received from the base station.

[0286] According to one embodiment, the control unit (1530) may transmit an RRS change MAC CE to the base station to reset the parameter set for the RRS.

[0287] FIG. 16 is a block diagram illustrating a base station according to embodiments of the present invention.

[0288] The base station of FIG. 16 may be implemented as a base station, eNB, gNB, source base station, or target base station as illustrated in FIGS. 1 to 14. Referring to FIG. 16, the base station may include a transceiver (1610), a memory (1620), and a control unit (1630).

[0289] The transceiver (1610) can transmit and receive signals with a terminal, another base station, or a network device. The transceiver (1610) may also be referred to as a transceiver. The transceiver (1610) may include a transmitter and a receiver.

[0290] The memory (1620) can store at least one of information transmitted and received through the transceiver (1610) and information generated through the control unit (1630).

[0291] The control unit (1630) may be defined as a circuit or application-specific integrated circuit, or at least one processor. The control unit (1630) may control the overall operation of the base station according to the embodiment proposed in the present disclosure. For example, the control unit (1630) may control the signal flow between each block to perform operations according to the flowchart described above. Specifically, the control unit (1630) may control the operation of the base station, eNB, gNB, source base station, or target base station, for example, as illustrated in FIGS. 1 to 14 .

[0292] According to one embodiment, the control unit (1630) may receive, from a user equipment (UE), medium access control (MAC) control elements (CE) for activating radio resource sharing (RRS) between cellular communication and heterogeneous radio access technology (RAT) using the same band. According to one embodiment, the control unit (1630) may transmit, to the UE, an RRC (radio resource control) reconfiguration message including a parameter set for the RRS between the cellular communication and the heterogeneous RAT. According to one embodiment, the control unit (1630) may receive, from the UE, an RRC reconfiguration complete message in response to the RRC reconfiguration message.

[0293] The methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software. If implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute the methods according to the embodiments described in the claims or specification of the present disclosure.

[0294] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage device, magnetic cassette. Or, they may be stored in a memory configured as a combination of some or all of these. In addition, each configuration memory may be included in multiple numbers.

[0295] Additionally, the program may be stored in an attachable storage device that is accessible via a communication network such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.

[0296] In the specific embodiments of the present disclosure described above, components included in the invention are expressed in the singular or plural form, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in the plural form may be composed of singular elements, or components expressed in the singular form may be composed of plural elements.

[0297] While the detailed description of this disclosure has described specific embodiments, it should be understood that various modifications are possible without departing from the scope of this disclosure. Therefore, the scope of this disclosure should not be limited to the described embodiments, but should be defined not only by the scope of the claims described below, but also by equivalents thereof.

Claims

1. In a method of UE (user equipment) in a wireless communication system, An operation of transmitting MAC (medium access control) CE (control elements) to a base station to activate RRS (radio resource sharing) between cellular communications and heterogeneous RAT (radio access technology) using the same band; An operation of receiving an RRC (radio resource control) reconfiguration message including a parameter set for the cellular communication and the RRS between the heterogeneous RAT from the base station; and A method characterized by comprising the action of transmitting an RRC reconfiguration complete message to the base station in response to the RRC reconfiguration message.

2. In the first paragraph, the parameter set for the cellular communication and the RRS between the heterogeneous RATs is, A method characterized by including at least one of an SFN (system frame number) at which a cycle of the RRS starts, information indicating a time period for the cellular communication to which the RRS is not applied (rrs-offDurationTimer), information indicating an inactive time period of the cellular communication for the RRS (rrs-onDurationTimer), and the number of times the RRS is performed.

3. In paragraph 1, A first timer (T) that prevents the UE from retransmitting the MAC CE PROHIBIT ) the action of starting; If the RRS parameter set included in the above MAC CE is identical to the parameter set included in the above RRC reconfiguration message, the first timer (T PROHIBIT ) and terminate the second timer (T) for the RRS. RRS) the action of starting; and A method characterized in that it further includes an operation of retransmitting the MAC CE to the base station for activating the RRS if the RRS parameter set included in the MAC CE is different from the parameter set included in the RRC reconfiguration message.

4. In paragraph 1, When an antenna sharing notification message (ANT Sharing Notification) is transmitted from the MAC layer of the UE to the RRC layer through internal signaling of the UE, a third timer (T) is started. RRSWAIT ) the action of starting; and The third timer (T) above RRSWAIT ) further includes an action of retransmitting the MAC CE for activating the RRS to the base station if the RRC reconfiguration message including the parameter set is not received until the expiration of the RRC reconfiguration message. The third timer (T) above RRSWAIT ) is set not to retransmit the MAC CE for activating the RRS until the expiration.

5. In paragraph 1, An operation of receiving a first message (UECapabilityEnquiry) from the base station inquiring whether the UE supports the RRS; and A method further comprising the action of transmitting a second message (UECapabilityInformation) including information on whether the UE supports the RRS to the base station.

6. In paragraph 1, A method further comprising the action of receiving an RRC reconfiguration message from the base station for clearing the parameter set for the RRS.

7. In paragraph 6, A method characterized in that the MAC CE for disabling the RRS and the RRC reconfiguration message for clearing the parameter set for the RRS are piggybacked and received from the base station.

8. In paragraph 1, A method characterized by further comprising the action of transmitting an RRS change MAC CE to the base station to reset the parameter set for the RRS.

9. In a method of a base station in a wireless communication system, An operation of receiving MAC (medium access control) CE (control elements) from UE (user equipment) to activate RRS (radio resource sharing) between cellular communication and heterogeneous RAT (radio access technology) using the same band; An operation of transmitting an RRC (radio resource control) reconfiguration message including a parameter set for the cellular communication and the RRS between the heterogeneous RAT to the UE; and A method characterized by comprising the action of receiving an RRC reconfiguration complete message from the UE in response to the RRC reconfiguration message.

10. In the 9th paragraph, the parameter set for the cellular communication and the RRS between the heterogeneous RATs is A method characterized by including at least one of an SFN (system frame number) at which a cycle of the RRS starts, information indicating a time period for the cellular communication to which the RRS is not applied (rrs-offDurationTimer), information indicating an inactive time period of the cellular communication for the RRS (rrs-onDurationTimer), and the number of times the RRS is performed.

11. In paragraph 9, An operation of transmitting a first message (UECapabilityEnquiry) to the UE to inquire whether the UE supports the RRS; and A method further comprising the action of receiving a second message (UECapabilityInformation) from the UE, the second message including information on whether the UE supports the RRS.

12. In paragraph 9, A method further comprising the action of transmitting an RRC reconfiguration message to the UE for clearing the parameter set for the RRS.

13. In paragraph 12, A method characterized in that the MAC CE for disabling the RRS and the RRC reconfiguration message for clearing the parameter set for the RRS are piggybacked and transmitted to the UE.

14. In a wireless communication system, in the UE (user equipment), Transmitter and receiver; and comprising a control unit, said control unit comprising: Controls the transmission of MAC (medium access control) CE (control elements) to the base station to activate RRS (radio resource sharing) between cellular communication and heterogeneous RAT (radio access technology) using the same band, Receiving an RRC (radio resource control) reconfiguration message including a parameter set for the cellular communication and the RRS between the heterogeneous RAT from the base station, A UE characterized by controlling to transmit an RRC reconfiguration complete message to the base station in response to the RRC reconfiguration message.

15. In a base station in a wireless communication system, Transmitter and receiver; and comprising a control unit, said control unit comprising: Receives MAC (medium access control) CE (control elements) from UE (user equipment) to activate RRS (radio resource sharing) between cellular communication and heterogeneous RAT (radio access technology) using the same band, Controlling to transmit to the UE an RRC (radio resource control) reconfiguration message including a parameter set for the cellular communication and the RRS between the heterogeneous RAT, A base station characterized by receiving an RRC reconfiguration complete message from the UE in response to the RRC reconfiguration message.

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