WO2022086282A1 - 무선 통신 시스템에서 모빌리티를 수행하기 위한 방법 및 장치 - Google Patents
무선 통신 시스템에서 모빌리티를 수행하기 위한 방법 및 장치 Download PDFInfo
- Publication number
- WO2022086282A1 WO2022086282A1 PCT/KR2021/014936 KR2021014936W WO2022086282A1 WO 2022086282 A1 WO2022086282 A1 WO 2022086282A1 KR 2021014936 W KR2021014936 W KR 2021014936W WO 2022086282 A1 WO2022086282 A1 WO 2022086282A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wireless device
- information
- network
- wireless
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
- H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/38—Reselection control by fixed network equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present disclosure relates to mobility in a wireless communication system.
- a wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.).
- Examples of the multiple access system include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency
- a sidelink refers to a communication method in which a direct link is established between user equipment (UE), and voice or data is directly exchanged between terminals without going through a base station (BS).
- SL is being considered as a method to solve the burden of the base station due to the rapidly increasing data traffic.
- V2X vehicle-to-everything refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-built objects through wired/wireless communication.
- V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P).
- V2X communication may be provided through a PC5 interface and/or a Uu interface.
- RAT radio access technology
- MTC massive machine type communication
- URLLC Ultra-Reliable and Low Latency Communication
- a next-generation radio access technology in consideration of the like may be referred to as a new radio access technology (RAT) or a new radio (NR).
- RAT new radio access technology
- NR new radio
- V2X vehicle-to-everything
- 1 is a diagram for explaining the comparison of V2X communication based on RAT before NR and V2X communication based on NR.
- V2X message may include location information, dynamic information, attribute information, and the like.
- the UE may transmit a periodic message type CAM and/or an event triggered message type DENM to another UE.
- the CAM may include basic vehicle information such as dynamic state information of the vehicle such as direction and speed, vehicle static data such as dimensions, external lighting conditions, and route details.
- the UE may broadcast a CAM, and the CAM latency may be less than 100 ms.
- the terminal may generate a DENM and transmit it to another terminal.
- all vehicles within the transmission range of the terminal may receive the CAM and/or DENM.
- the DENM may have a higher priority than the CAM.
- V2X scenarios are being presented in NR.
- various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, and the like.
- vehicles can be dynamically grouped and moved together.
- vehicles belonging to the group may receive periodic data from a leading vehicle.
- the vehicles belonging to the group may reduce or widen the distance between the vehicles by using periodic data.
- the vehicle can be semi-automated or fully automated.
- each vehicle may adjust trajectories or maneuvers based on data obtained from local sensors of the proximate vehicle and/or proximate logical entity.
- each vehicle may share driving intention with adjacent vehicles.
- raw data or processed data obtained through local sensors, or live video data is a vehicle, a logical entity, a terminal of pedestrians and / or can be interchanged between V2X application servers.
- the vehicle may recognize an environment that is improved over an environment that can be detected using its own sensor.
- a remote driver or V2X application may operate or control the remote vehicle.
- a route can be predicted such as in public transportation
- cloud computing-based driving may be used to operate or control the remote vehicle.
- access to a cloud-based back-end service platform may be considered for remote driving.
- the UE may perform mobility to the target cell.
- the UE may perform mobility directly to the target cell, but may also perform mobility to another UE (ie, a relay UE) belonging to the target cell.
- This relay UE may be selected by a UE performing mobility or may be selected by a base station.
- the present disclosure provides a method and apparatus for mobility in a wireless communication system.
- the present disclosure provides a method and apparatus for a remote UE to perform mobility as a relay UE in a wireless communication system.
- the present disclosure provides a method and apparatus for a remote UE to select a relay UE for mobility in a wireless communication system.
- the present disclosure provides a method and apparatus for a base station to select a relay UE for mobility in a wireless communication system.
- a method performed by a first wireless device in a wireless communication system includes a process of transmitting information on the first wireless device to a network, and information on the first wireless device After transmitting to the network, receive from the network information about a selection mode indicating whether another wireless device to establish a connection with the first wireless device is selected by the network or is selected by the first wireless device and identifying the second wireless device determined based on the selection mode, and establishing a connection with the second wireless device.
- a first wireless device in a wireless communication system includes: a transceiver; Memory; and at least one processor operatively coupled to the transceiver and the memory, wherein the at least one processor controls the transceiver to transmit information about the first wireless device to a network, the transceiver to control, after transmitting information about the first wireless device to the network, whether another wireless device to establish a connection with the first wireless device is selected by the network or selected by the first wireless device It is configured to receive information on the indicated selection mode from the network, identify a second wireless device determined based on the selection mode, and establish a connection with the second wireless device.
- a processor for a first wireless device executes instructions implemented by software codes stored in a memory of the first wireless device.
- the instructions when executed by the processor, include transmitting information on the first wireless device to a network, transmitting information on the first wireless device to the network, and then connecting with the first wireless device receiving, from the network, information on a selection mode indicating whether another wireless device to establish is selected by the network or by the first wireless device, and a second wireless device determined based on the selection mode configured to perform an operation of identifying a device and an operation of establishing a connection with the second wireless device.
- a non-transitory computer readable medium stores a plurality of instructions, and the plurality of instructions are transmitted to the first wireless device.
- the operation of the first wireless device transmitting information on the first wireless device to the network when executed by the processor, and after transmitting the information on the first wireless device to the network, the first wireless device receiving, from the network, information on a selection mode indicating whether another wireless device to establish a connection with the network is selected by the network or the first wireless device; It is configured to perform an operation of identifying two wireless devices and establishing a connection with the second wireless device.
- a method performed by a base station in a wireless communication system includes a process of receiving information on the wireless device from a wireless device, and based on the information on the wireless device, the wireless device and determining a selection mode indicating whether another wireless device to establish a connection with the network is selected by or by the wireless device, and transmitting information about the selection mode to the wireless device.
- a base station in a wireless communication system a transceiver; Memory; and at least one processor operatively coupled to the transceiver and the memory, wherein the at least one processor controls the transceiver to receive, from a wireless device, information about the wireless device, and to the wireless device. Based on the information on the wireless device, a selection mode indicating whether another wireless device to establish a connection with the wireless device is selected by the network or selected by the wireless device is determined, and the transceiver is controlled to enter the selection mode. is configured to transmit information about the wireless device to the wireless device.
- a selection subject of a relay UE for mobility may be efficiently determined according to a situation, and a mobility procedure to the relay UE may be optimized.
- 1 is a diagram for explaining the comparison of V2X communication based on RAT before NR and V2X communication based on NR.
- FIG. 2 shows a structure of an NR system according to an embodiment of the present disclosure.
- FIG 3 illustrates a radio protocol architecture according to an embodiment of the present disclosure.
- FIG. 4 shows the structure of an NR radio frame according to an embodiment of the present disclosure.
- FIG 5 shows a slot structure of an NR frame according to an embodiment of the present disclosure.
- FIG. 6 shows a terminal performing V2X or SL communication, according to an embodiment of the present disclosure.
- FIG. 7 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode, according to an embodiment of the present disclosure.
- FIG 8 illustrates an indirect mobility procedure according to an embodiment of the present disclosure.
- FIG 9 shows an example of a procedure for selecting a relay UE according to an embodiment of the present disclosure.
- FIG. 10 illustrates an example of a method performed by a wireless device according to an embodiment of the present disclosure.
- FIG 11 shows an example of a method performed by a base station according to an embodiment of the present disclosure.
- FIG. 12 shows an example of a procedure for a remote UE to directly select a relay UE according to an embodiment of the present disclosure.
- FIG. 13 shows an example of a procedure for a base station to select a relay UE according to an embodiment of the present disclosure.
- FIG. 14 shows an example of a procedure for a remote UE and a base station to select a relay UE together according to an embodiment of the present disclosure.
- FIG. 15 shows a communication system 1 according to an embodiment of the present disclosure.
- FIG. 16 illustrates a wireless device according to an embodiment of the present disclosure.
- FIG. 17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
- FIG. 18 illustrates a wireless device according to an embodiment of the present disclosure.
- FIG. 19 illustrates a portable device according to an embodiment of the present disclosure.
- FIG. 20 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present disclosure.
- a or B (A or B) may mean “only A”, “only B”, or “both A and B”.
- a or B (A or B) may be interpreted as “A and/or B (A and/or B)”.
- A, B or C(A, B or C) herein means “only A”, “only B”, “only C”, or “any and any combination of A, B and C ( any combination of A, B and C)”.
- a slash (/) or a comma (comma) may mean “and/or”.
- A/B may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”.
- A, B, C may mean “A, B, or C”.
- At least one of A and B may mean “only A”, “only B”, or “both A and B”.
- the expression “at least one of A or B” or “at least one of A and/or B” means “at least one It can be interpreted the same as “A and B (at least one of A and B)”.
- At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C” any combination of A, B and C”. Also, “at least one of A, B or C” or “at least one of A, B and/or C” means can mean “at least one of A, B and C”.
- parentheses used herein may mean “for example”.
- PDCCH control information
- PDCCH control information
- parentheses used herein may mean “for example”.
- PDCCH control information
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE).
- GSM global system for mobile communications
- GPRS general packet radio service
- EDGE enhanced data rates for GSM evolution
- OFDMA may be implemented with a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA).
- IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e.
- UTRA is part of the universal mobile telecommunications system (UMTS).
- 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), and employs OFDMA in downlink and SC in uplink -Adopt FDMA.
- LTE-A (advanced) is an evolution of 3GPP LTE.
- 5G NR is a successor technology of LTE-A, and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low frequency bands below 1 GHz, to intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.
- LTE-A or 5G NR is mainly described, but the technical idea according to an embodiment of the present disclosure is not limited thereto.
- FIG. 2 shows a structure of an NR system according to an embodiment of the present disclosure.
- the embodiment of FIG. 2 may be combined with various embodiments of the present disclosure.
- a Next Generation-Radio Access Network may include a base station 20 that provides user plane and control plane protocol termination to the terminal 10 .
- the base station 20 may include a next generation-Node B (gNB) and/or an evolved-NodeB (eNB).
- the terminal 10 may be fixed or mobile, and other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), and a wireless device can be called
- the base station may be a fixed station communicating with the terminal 10 , and may be referred to as a base transceiver system (BTS), an access point, or other terms.
- BTS base transceiver system
- the embodiment of FIG. 2 exemplifies a case including only gNB.
- the base stations 20 may be connected to each other through an Xn interface.
- the base station 20 may be connected to a 5G core network (5G Core Network: 5GC) through an NG interface. More specifically, the base station 20 may be connected to an access and mobility management function (AMF) 30 through an NG-C interface, and may be connected to a user plane function (UPF) 30 through an NG-U interface.
- AMF access and mobility management function
- UPF user plane function
- the layers of the Radio Interface Protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. layer), L2 (layer 2, second layer), and L3 (layer 3, third layer).
- OSI Open System Interconnection
- L2 layer 2, second layer
- L3 layer 3, third layer
- the physical layer belonging to the first layer provides an information transfer service using a physical channel
- the RRC (Radio Resource Control) layer located in the third layer is a radio resource between the terminal and the network. plays a role in controlling To this end, the RRC layer exchanges RRC messages between the terminal and the base station.
- FIG. 3 illustrates a radio protocol architecture according to an embodiment of the present disclosure.
- the embodiment of FIG. 3 may be combined with various embodiments of the present disclosure.
- Fig. 3 (a) shows a radio protocol stack of a user plane for Uu communication
- Fig. 3 (b) is a radio protocol of a control plane for Uu communication.
- FIG. 3C shows a radio protocol stack of a user plane for SL communication
- FIG. 3D shows a radio protocol stack of a control plane for SL communication.
- a physical layer provides an information transmission service to a higher layer using a physical channel.
- the physical layer is connected to a medium access control (MAC) layer, which is an upper layer, through a transport channel.
- MAC medium access control
- Data moves between the MAC layer and the physical layer through the transport channel.
- Transmission channels are classified according to how and with what characteristics data is transmitted over the air interface.
- the physical channel may be modulated in an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and time and frequency are used as radio resources.
- OFDM Orthogonal Frequency Division Multiplexing
- the MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel.
- RLC radio link control
- the MAC layer provides a mapping function from a plurality of logical channels to a plurality of transport channels.
- the MAC layer provides a logical channel multiplexing function by mapping a plurality of logical channels to a single transport channel.
- the MAC sublayer provides data transfer services on logical channels.
- the RLC layer performs concatenation, segmentation, and reassembly of RLC service data units (SDUs).
- SDUs RLC service data units
- the RLC layer has a transparent mode (Transparent Mode, TM), an unacknowledged mode (Unacknowledged Mode, UM) and an acknowledged mode (Acknowledged Mode).
- TM Transparent Mode
- UM Unacknowledged Mode
- AM acknowledged Mode
- AM RLC provides error correction through automatic repeat request (ARQ).
- the RRC (Radio Resource Control) layer is defined only in the control plane.
- the RRC layer is responsible for controlling logical channels, transport channels and physical channels in relation to configuration, re-configuration, and release of radio bearers.
- RB is in the first layer (physical layer or PHY layer) and second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transfer between the terminal and the network.
- Logical path provided by
- Functions of the PDCP layer in the user plane include delivery of user data, header compression and ciphering.
- Functions of the PDCP layer in the control plane include transmission of control plane data and encryption/integrity protection.
- the SDAP Service Data Adaptation Protocol
- the SDAP layer performs mapping between QoS flows and data radio bearers, and marking QoS flow identifiers (IDs) in downlink and uplink packets.
- Setting the RB means defining the characteristics of a radio protocol layer and channel to provide a specific service, and setting each specific parameter and operation method.
- the RB may be further divided into a Signaling Radio Bearer (SRB) and a Data Radio Bearer (DRB).
- SRB Signaling Radio Bearer
- DRB Data Radio Bearer
- the terminal When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state, otherwise it is in the RRC_IDLE state.
- the RRC_INACTIVE state is additionally defined, and the UE in the RRC_INACTIVE state may release the connection to the base station while maintaining the connection to the core network.
- a downlink transmission channel for transmitting data from the network to the terminal there are a BCH (Broadcast Channel) for transmitting system information and a downlink SCH (Shared Channel) for transmitting user traffic or control messages.
- BCH Broadcast Channel
- SCH Shared Channel
- downlink multicast or broadcast service traffic or control messages they may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- RACH random access channel
- SCH uplink shared channel
- the logical channels that are located above the transport channel and are mapped to the transport channel include a Broadcast Control Channel (BCCH), a Paging Control Channel (PCCH), a Common Control Channel (CCCH), a Multicast Control Channel (MCCH), and a Multicast Traffic Channel (MTCH). Channel), etc.
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic Channel
- FIG. 4 shows the structure of an NR radio frame according to an embodiment of the present disclosure.
- radio frames may be used in uplink and downlink transmission in NR.
- the radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (Half-Frame, HF).
- a half-frame may include 5 1ms subframes (Subframe, SF).
- a subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS).
- SCS subcarrier spacing
- Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).
- CP cyclic prefix
- each slot may include 14 symbols.
- each slot may include 12 symbols.
- the symbol may include an OFDM symbol (or a CP-OFDM symbol), a single carrier-FDMA (SC-FDMA) symbol (or a Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).
- Table 1 below shows the number of symbols per slot (N slot symb ), the number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe, u slot ) is exemplified.
- Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS when the extended CP is used.
- OFDM(A) numerology eg, SCS, CP length, etc.
- OFDM(A) numerology may be set differently between a plurality of cells merged into one UE. Accordingly, an (absolute time) interval of a time resource (eg, a subframe, a slot, or a TTI) (commonly referred to as a TU (Time Unit) for convenience) composed of the same number of symbols may be set differently between the merged cells.
- multiple numerology or SCS to support various 5G services may be supported. For example, when SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when SCS is 30 kHz/60 kHz, dense-urban, lower latency) and a wider carrier bandwidth may be supported. For SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz may be supported to overcome phase noise.
- the NR frequency band may be defined as two types of frequency ranges.
- the two types of frequency ranges may be FR1 and FR2.
- the numerical value of the frequency range may be changed.
- the two types of frequency ranges may be as shown in Table 3 below.
- FR1 may mean "sub 6GHz range”
- FR2 may mean “above 6GHz range”
- mmW millimeter wave
- FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for a vehicle (eg, autonomous driving).
- a slot includes a plurality of symbols in the time domain.
- one slot may include 14 symbols, but in the case of an extended CP, one slot may include 12 symbols.
- one slot may include 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
- a carrier wave includes a plurality of subcarriers in the frequency domain.
- a resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
- BWP Bandwidth Part
- P Physical Resource Block
- a carrier wave may include a maximum of N (eg, 5) BWPs. Data communication may be performed through the activated BWP.
- Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.
- RE resource element
- the air interface between the terminal and the terminal or the air interface between the terminal and the network may be composed of layer 1, L2 layer, and L3 layer.
- layer 1 may mean a physical layer.
- the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer.
- the L3 layer may mean an RRC layer.
- V2X or SL (sidelink) communication will be described.
- FIG. 6 shows a terminal performing V2X or SL communication, according to an embodiment of the present disclosure.
- terminal in V2X or SL communication may mainly refer to a user's terminal.
- the base station may also be regarded as a kind of terminal.
- terminal 1 may be the first apparatus 100
- terminal 2 may be the second apparatus 200 .
- UE 1 may select a resource unit corresponding to a specific resource from a resource pool indicating a set of a series of resources. And, UE 1 may transmit an SL signal using the resource unit.
- terminal 2 which is a receiving terminal, may receive a resource pool configured for terminal 1 to transmit a signal, and may detect a signal of terminal 1 in the resource pool.
- the base station may inform the terminal 1 of the resource pool.
- another terminal informs terminal 1 of the resource pool, or terminal 1 may use a preset resource pool.
- the resource pool may be composed of a plurality of resource units, and each terminal may select one or a plurality of resource units to use for its own SL signal transmission.
- a resource pool can be subdivided into several types. For example, according to the content of the SL signal transmitted from each resource pool, the resource pool may be divided as follows.
- Scheduling assignment is a location of a resource used by a transmitting terminal for transmission of an SL data channel, MCS (Modulation and Coding Scheme) or MIMO (Multiple Input Multiple Output) required for demodulation of other data channels ) may be a signal including information such as a transmission method and TA (Timing Advance).
- SA may also be multiplexed and transmitted together with SL data on the same resource unit.
- the SA resource pool may mean a resource pool in which SA is multiplexed with SL data and transmitted.
- the SA may be referred to as an SL control channel.
- SL data channel Physical Sidelink Shared Channel, PSSCH
- PSSCH Physical Sidelink Shared Channel
- SL data channel may be a resource pool used by the transmitting terminal to transmit user data. If SA is multiplexed and transmitted together with SL data on the same resource unit, only the SL data channel of the form excluding SA information may be transmitted from the resource pool for the SL data channel. In other words, REs (Resource Elements) used to transmit SA information on individual resource units in the SA resource pool may still be used to transmit SL data in the resource pool of the SL data channel.
- the transmitting terminal may transmit by mapping the PSSCH to the continuous PRB.
- the discovery channel may be a resource pool for the transmitting terminal to transmit information such as its ID. Through this, the transmitting terminal can allow the neighboring terminal to discover itself.
- the transmission timing determination method of the SL signal eg, whether it is transmitted at the reception time of the synchronization reference signal or is transmitted by applying a predetermined timing advance at the reception time
- resource Allocation method eg, whether the base station designates individual signal transmission resources to individual transmission terminals or whether individual transmission terminals select individual signal transmission resources by themselves within the resource pool
- signal format eg, each SL It may be divided into different resource pools again according to the number of symbols occupied by a signal in one subframe, or the number of subframes used for transmission of one SL signal
- the signal strength from the base station the transmission power strength of the SL terminal, and the like.
- Terminal 2 may perform indirect communication with the base station through terminal 1 . Such indirect communication may be performed through an access link (or Uu link) between the terminal 1 and the base station and a sidelink between the terminal 1 and the terminal 2 .
- Terminal 1 may relay signal transmission between the base station and terminal 2 .
- terminal 1 may be referred to as a relay terminal, and terminal 2 may be referred to as a remote terminal.
- the terminal 2 performs indirect communication with the base station through the terminal 1
- the connection between the terminal 2 and the base station may be referred to as an indirect connection.
- the remote terminal may be within the connection range of the base station (in-coverage). In this case, the remote terminal may be within the connection range of the same base station as the relay terminal, or may be within the connection range of another base station.
- the remote terminal may be out-of-coverage of the base station.
- terminal 2 may perform direct communication with the base station without going through terminal 1. Such direct communication may be performed through an access link (or Uu link) between the terminal 2 and the base station.
- the connection between the terminal 2 and the base station may be referred to as a direct connection.
- the SLSS is an SL-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS).
- PSSS Primary Sidelink Synchronization Signal
- SSSS Secondary Sidelink Synchronization Signal
- the PSSS may be referred to as a Sidelink Primary Synchronization Signal (S-PSS)
- S-PSS Sidelink Primary Synchronization Signal
- S-SSS Sidelink Secondary Synchronization Signal
- length-127 M-sequences may be used for S-PSS
- length-127 Gold sequences may be used for S-SSS.
- the terminal may detect an initial signal using S-PSS and may obtain synchronization.
- the UE may acquire detailed synchronization using S-PSS and S-SSS, and may detect a synchronization signal ID.
- PSBCH Physical Sidelink Broadcast Channel
- PSBCH Physical Sidelink Broadcast Channel
- the basic information is SLSS-related information, duplex mode (Duplex Mode, DM), TDD UL/DL (Time Division Duplex Uplink/Downlink) configuration, resource pool related information, type of application related to SLSS, It may be a subframe offset, broadcast information, or the like.
- the payload size of PSBCH may be 56 bits including a CRC of 24 bits.
- S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission (eg, SL SS (Synchronization Signal)/PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)).
- the S-SSB may have the same numerology (ie, SCS and CP length) as a Physical Sidelink Control Channel (PSCCH)/Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth is (pre)set SL Sidelink (BWP) BWP).
- the bandwidth of the S-SSB may be 11 resource blocks (RBs).
- the PSBCH may span 11 RBs.
- the frequency position of the S-SSB may be set (in advance). Therefore, the UE does not need to perform hypothesis detection in frequency in order to discover the S-SSB in the carrier.
- the transmitting terminal may transmit one or more S-SSBs to the receiving terminal within one S-SSB transmission period according to the SCS.
- the number of S-SSBs that the transmitting terminal transmits to the receiving terminal within one S-SSB transmission period may be pre-configured or configured in the transmitting terminal.
- the S-SSB transmission period may be 160 ms.
- an S-SSB transmission period of 160 ms may be supported.
- the transmitting terminal may transmit one or two S-SSBs to the receiving terminal within one S-SSB transmission period. For example, when the SCS is 30 kHz in FR1, the transmitting terminal may transmit one or two S-SSBs to the receiving terminal within one S-SSB transmission period. For example, when the SCS is 60 kHz in FR1, the transmitting terminal may transmit one, two or four S-SSBs to the receiving terminal within one S-SSB transmission period.
- the transmitting terminal can transmit 1, 2, 4, 8, 16 or 32 S-SSBs to the receiving terminal within one S-SSB transmission period. there is.
- the transmitting terminal sends 1, 2, 4, 8, 16, 32 or 64 S-SSBs to the receiving terminal within one S-SSB transmission period. can be transmitted.
- the structure of the S-SSB transmitted from the transmitting terminal to the receiving terminal may be different according to the CP type.
- the CP type may be a Normal CP (NCP) or an Extended CP (ECP).
- NCP Normal CP
- ECP Extended CP
- the number of symbols for mapping the PSBCH in the S-SSB transmitted by the transmitting terminal may be 9 or 8.
- the CP type is ECP
- the number of symbols for mapping the PSBCH in the S-SSB transmitted by the transmitting terminal may be 7 or 6.
- the PSBCH may be mapped to the first symbol in the S-SSB transmitted by the transmitting terminal.
- the receiving terminal receiving the S-SSB may perform an automatic gain control (AGC) operation in the first symbol period of the S-SSB.
- AGC automatic gain control
- the transmission mode may be referred to as a mode or a resource allocation mode.
- a transmission mode in LTE may be referred to as an LTE transmission mode
- a transmission mode in NR may be referred to as an NR resource allocation mode.
- (a) of FIG. 7 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3.
- (a) of FIG. 7 shows a terminal operation related to NR resource allocation mode 1.
- LTE transmission mode 1 may be applied to general SL communication
- LTE transmission mode 3 may be applied to V2X communication.
- (b) of FIG. 7 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4.
- (b) of FIG. 7 shows a terminal operation related to NR resource allocation mode 2.
- the base station may schedule an SL resource to be used by the terminal for SL transmission.
- the base station may perform resource scheduling to UE 1 through PDCCH (more specifically, Downlink Control Information (DCI)), and UE 1 may perform V2X or SL communication with UE 2 according to the resource scheduling.
- DCI Downlink Control Information
- UE 1 transmits SCI (Sidelink Control Information) to UE 2 through a Physical Sidelink Control Channel (PSCCH), and then transmits data based on the SCI to UE 2 through a Physical Sidelink Shared Channel (PSSCH).
- SCI Servicelink Control Information
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- the UE may be provided with or allocated resources for transmission of one or more SLs of one TB (Transport Block) from the base station through a dynamic grant.
- the base station may provide a resource for transmission of the PSCCH and/or PSSCH to the terminal using a dynamic grant.
- the transmitting terminal may report the SL HARQ (Hybrid Automatic Repeat Request) feedback received from the receiving terminal to the base station.
- PUCCH resources and timing for reporting SL HARQ feedback to the base station may be determined based on an indication in the PDCCH for the base station to allocate resources for SL transmission.
- DCI may indicate a slot offset between DCI reception and a first SL transmission scheduled by DCI.
- the minimum gap between the DCI scheduling the SL transmission resource and the first scheduled SL transmission resource may not be smaller than the processing time of the corresponding terminal.
- the terminal may be provided or allocated a resource set from the base station periodically for a plurality of SL transmissions through a configured grant.
- the grant to be configured may include a configured grant type 1 or a configured grant type 2.
- the terminal can determine the TB to transmit in each case (occasions) indicated by a given configured grant (given configured grant).
- the base station may allocate the SL resource to the terminal on the same carrier, and may allocate the SL resource to the terminal on different carriers.
- the NR base station may control LTE-based SL communication.
- the NR base station may transmit the NR DCI to the terminal to schedule the LTE SL resource.
- a new RNTI for scrambling the NR DCI may be defined.
- the terminal may include an NR SL module and an LTE SL module.
- the NR SL module may convert the NR SL DCI to LTE DCI type 5A, and the NR SL module is X ms LTE DCI type 5A may be delivered to the LTE SL module as a unit.
- the LTE SL module may apply activation and/or release to the first LTE subframe after Z ms.
- the X may be dynamically indicated using a field of DCI.
- the minimum value of X may be different according to UE capability.
- the terminal may report a single value according to the terminal capability.
- X may be a positive number.
- the terminal can determine the SL transmission resource within the SL resource set by the base station / network or the preset SL resource.
- the configured SL resource or the preset SL resource may be a resource pool.
- the UE may autonomously select or schedule a resource for SL transmission.
- the UE may perform SL communication by selecting a resource by itself within a set resource pool.
- the terminal may select a resource by itself within the selection window by performing a sensing (sensing) and resource (re)selection procedure.
- the sensing may be performed in units of subchannels.
- UE 1 which has selected a resource within the resource pool, transmits the SCI to UE 2 through the PSCCH, and may transmit data based on the SCI to UE 2 through the PSSCH.
- the terminal may help select an SL resource for another terminal.
- the UE may receive a configured grant for SL transmission.
- the terminal may schedule SL transmission of another terminal.
- the UE may reserve an SL resource for blind retransmission.
- the first terminal may indicate to the second terminal the priority of SL transmission using SCI.
- the second terminal may decode the SCI, and the second terminal may perform sensing and/or resource (re)selection based on the priority.
- the resource (re)selection procedure includes the step of the second terminal identifying a candidate resource in a resource selection window, and the second terminal selecting a resource for (re)transmission from among the identified candidate resources can do.
- the resource selection window may be a time interval during which the terminal selects a resource for SL transmission.
- the resource selection window may start at T1 ⁇ 0, and the resource selection window is determined by the remaining packet delay budget of the second terminal. may be limited. For example, in the step of the second terminal identifying the candidate resource in the resource selection window, a specific resource is indicated by the SCI received by the second terminal from the first terminal, and 1 SL RSRP measurement value for the specific resource is If the SL RSRP threshold is exceeded, the second terminal may not determine the specific resource as a candidate resource. For example, the SL RSRP threshold may be determined based on the priority of the SL transmission indicated by the SCI received by the second terminal from the first terminal and the priority of the SL transmission on the resource selected by the second terminal.
- the 1 SL RSRP may be measured based on an SL DMRS (Demodulation Reference Signal).
- SL DMRS Demodulation Reference Signal
- one or more PSSCH DMRS patterns may be set or preset for each resource pool in the time domain.
- the PDSCH DMRS configuration type 1 and/or type 2 may be the same as or similar to the frequency domain pattern of the PSSCH DMRS.
- the exact DMRS pattern may be indicated by SCI.
- the transmitting terminal may select a specific DMRS pattern from among DMRS patterns configured or preset for the resource pool.
- the transmitting terminal may perform initial transmission of a TB (Transport Block) without reservation. For example, based on the sensing and resource (re)selection procedure, the transmitting terminal may reserve an SL resource for initial transmission of the second TB by using the SCI associated with the first TB.
- a TB Transport Block
- the transmitting terminal may reserve an SL resource for initial transmission of the second TB by using the SCI associated with the first TB.
- the UE may reserve a resource for feedback-based PSSCH retransmission through signaling related to previous transmission of the same transport block (TB).
- the maximum number of SL resources reserved by one transmission including the current transmission may be 2, 3, or 4.
- the maximum number of SL resources may be the same regardless of whether HARQ feedback is enabled.
- the maximum number of HARQ (re)transmissions for one TB may be limited by configuration or preset.
- the maximum number of HARQ (re)transmissions may be up to 32.
- the maximum number of HARQ (re)transmissions may be unspecified.
- the setting or preset may be for a transmitting terminal.
- HARQ feedback for releasing resources not used by the UE may be supported.
- the UE may indicate to another UE one or more subchannels and/or slots used by the UE by using SCI.
- the UE may indicate to another UE one or more subchannels and/or slots reserved by the UE for PSSCH (re)transmission by using SCI.
- the minimum allocation unit of the SL resource may be a slot.
- the size of the subchannel may be set for the terminal or may be preset.
- SCI Servicelink Control Information
- the transmitting terminal may transmit the SCI to the receiving terminal on the PSCCH.
- the receiving terminal may decode one SCI to receive the PSSCH from the transmitting terminal.
- the transmitting terminal may transmit two consecutive SCIs (eg, 2-stage SCI) to the receiving terminal on the PSCCH and/or the PSSCH.
- the receiving terminal may decode two consecutive SCIs (eg, 2-stage SCI) to receive the PSSCH from the transmitting terminal.
- the SCI configuration fields are divided into two groups in consideration of the (relatively) high SCI payload size
- the SCI including the first SCI configuration field group is the first SCI or the 1st SCI .
- the SCI including the second SCI configuration field group may be referred to as a second SCI or a 2nd SCI.
- the transmitting terminal may transmit the first SCI to the receiving terminal through the PSCCH.
- the transmitting terminal may transmit the second SCI to the receiving terminal on the PSCCH and/or the PSSCH.
- the second SCI may be transmitted to the receiving terminal through (independent) PSCCH or may be piggybacked and transmitted together with data through PSSCH.
- two consecutive SCIs may be applied for different transmissions (eg, unicast, broadcast, or groupcast).
- the transmitting terminal may transmit some or all of the following information to the receiving terminal through SCI.
- the transmitting terminal may transmit some or all of the following information to the receiving terminal through the first SCI and/or the second SCI.
- PSSCH and / or PSCCH related resource allocation information for example, time / frequency resource location / number, resource reservation information (eg, period), and / or
- SL CSI report request indicator or SL (1) RSRP (and/or SL (1) RSRQ and/or SL (1) RSSI) report request indicator, and/or
- SL CSI transmission indicator (or SL (1) RSRP (and / or SL (1) RSRQ and / or SL (1) RSSI) information transmission indicator), and / or
- NDI New Data Indicator
- RV Redundancy Version
- QoS information eg, priority information, and/or
- - Reference signal eg, DMRS, etc.
- information related to decoding and/or channel estimation of data transmitted through PSSCH for example, information related to a pattern of (time-frequency) mapping resource of DMRS, rank (rank) ) information, antenna port index information;
- the first SCI may include information related to channel sensing.
- the receiving terminal may decode the second SCI by using the PSSCH DMRS.
- a polar code used for the PDCCH may be applied to the second SCI.
- the payload size of the first SCI may be the same for unicast, groupcast and broadcast.
- the receiving terminal does not need to perform blind decoding of the second SCI.
- the first SCI may include scheduling information of the second SCI.
- the transmitting terminal since the transmitting terminal may transmit at least one of SCI, the first SCI, and/or the second SCI to the receiving terminal through the PSCCH, the PSCCH is the SCI, the first SCI and/or the first SCI. 2 may be substituted/substituted with at least one of SCI. And/or, for example, SCI may be replaced/substituted with at least one of PSCCH, first SCI, and/or second SCI. And/or, for example, since the transmitting terminal may transmit the second SCI to the receiving terminal through the PSSCH, the PSSCH may be replaced/substituted with the second SCI.
- mobility may include at least one of primary cell (PCell) handover (or simply handover (HO)), primary secondary cell (PSCell) addition, or PSCell change.
- PCell primary cell
- PSCell primary secondary cell
- PSCell change PSCell change
- indirect handover may occur in a layer 2 -relay operation.
- the remote UE may establish an indirect connection to the target gNB through the relay UE while establishing a direct connection with the serving gNB.
- the remote UE may directly select a relay UE for indirect handover.
- the remote UE may select one relay UE from among several relay UEs that satisfy the condition(s) of the AS-layer and/or higher layer. The selection of such a relay UE may depend on the implementation of the UE.
- the base station may select a relay UE for indirect handover.
- the remote UE may report ID/SL-RSRP information of the candidate relay UE to the serving gNB of the remote UE, and to the target relay UE Whether to switch may be determined by the serving gNB. That is, when service continuity is considered, the remote UE may report information on neighboring candidate relay UEs to the base station, and the base station may select an appropriate relay UE from among the candidate relay UEs based on the reported information. there is. If handover is required after the base station selects the relay UE, the base station may also determine the handover. An example of a procedure for the base station to select a relay UE for indirect handover is described in FIG. 9 .
- FIG 9 shows an example of a procedure for selecting a relay UE according to an embodiment of the present disclosure.
- the remote UE may report one or more candidate relay UE(s). Upon reporting, the remote UE may filter out the appropriate relay UE(s) that satisfy the condition(s) of the upper layer.
- the information reported by the remote UE may include ID and/or SL RSRP information of the relay UE.
- the gNB may select a target relay UE, and may determine switching to the target relay UE.
- step S905 the gNB may perform RRC reconfiguration for the relay UE for handover of the remote UE to the relay UE.
- Step S905 is an optional step and may be omitted.
- the gNB may send an RRC reconfiguration message to the remote UE.
- the RRC reconfiguration message may include the ID of the target relay UE and/or target setting for handover to the target relay UE.
- the remote UE may use the target setting provided in the RRC reconfiguration message to feed back an RRC reconfiguration complete message to the gNB through the target path.
- step S913 data path switching may occur.
- the relay UE for indirect handover may be directly selected by the remote UE or may be selected by the base station.
- the remote UE directly selects the relay UE
- the base station selects the relay UE
- a procedure for the remote UE to directly select a relay UE, a procedure for the base station to select a relay UE, and a procedure for the remote UE and the base station to select a relay UE together are described.
- FIG. 10 illustrates an example of a method performed by a wireless device according to an embodiment of the present disclosure. The steps illustrated in FIG. 10 may also be performed by the UE.
- the first wireless device may transmit information on the first wireless device to the network.
- step S1003 after the first wireless device transmits information about the first wireless device to the network, whether another wireless device to establish a connection with the first wireless device is selected by the network or the first wireless device Information on the selection mode indicating whether the device is selected by the device may be received from the network.
- the first wireless device may identify the determined second wireless device based on the selection mode.
- the first wireless device may establish a connection with the second wireless device.
- the information on the first wireless device may include at least one of information indicating whether the first wireless device is a low-power device or information on a remaining battery level of the first wireless device. .
- the selection mode may indicate that another wireless device to establish a connection with the first wireless device is selected by the first wireless device.
- the first wireless device may select the second wireless device based on the selection mode.
- the first wireless device may measure the sidelink signal strength.
- the first wireless device may identify one or more candidate wireless devices in which the measured sidelink signal strength is higher than a set threshold value.
- the first wireless device may select the second wireless device from among the one or more wireless devices.
- the first wireless device may transmit a mobility request message to the serving cell for the first wireless device.
- the mobility request message may include at least one of an identifier of the second wireless device or a cell identifier of a serving cell for the second wireless device.
- the serving cell for the second wireless device may be a target cell for mobility.
- the first wireless device may receive a mobility failure message from a serving cell for the first wireless device in response to the mobility request message.
- the first wireless device may disconnect from the second wireless device.
- the first wireless device may establish a connection with the third wireless device.
- the first wireless device may receive a mobility command for mobility to the target cell from the serving cell for the first wireless device in response to the mobility request message.
- the first wireless device may apply the target cell setting included in the mobility command. After applying the target cell setting, the first wireless device may transmit a mobility complete message to the target cell through the second wireless device.
- the selection mode may indicate that another wireless device to establish a connection with the first wireless device is selected by the network.
- the first wireless device may receive a mobility command including the identifier of the second wireless device from the network.
- the information on the selection mode indicating that the other wireless device to establish a connection with the first wireless device is selected by the network may correspond to a setting not to report the measurement result for the sidelink. there is.
- the first wireless device may measure the sidelink signal strength.
- the first wireless device may identify one or more candidate wireless devices in which the measured sidelink signal strength is higher than a set threshold value.
- the first wireless device may transmit a list of the one or more candidate wireless devices and information on a sidelink signal strength for the one or more candidate wireless devices to the network.
- the second wireless device may be selected by the network based on the sidelink signal strength from the list of one or more candidate wireless devices.
- the first wireless device may receive a plurality of mobility commands including the mobility command. Each of the plurality of mobility commands may be associated with a corresponding wireless device. The first wireless device may select the second wireless device from among a plurality of wireless devices associated with the plurality of mobility commands.
- the memory of the first wireless device may store software code implementing instructions for performing operations when executed by a processor for the first wireless device.
- the operations may include transmitting, to a network, information about the first wireless device; After transmitting information about the first wireless device to the network, a selection indicating whether another wireless device to establish a connection with the first wireless device is selected by the network or selected by the first wireless device receiving information about the mode from the network; identifying a second wireless device determined based on the selection mode; and establishing a connection with the second wireless device.
- a non-transitory computer readable medium stores a plurality of instructions.
- the plurality of instructions when executed by a processor of the first wireless device, may cause the first wireless device to perform operations.
- the operations may include transmitting, to a network, information about the first wireless device; After transmitting information about the first wireless device to the network, a selection indicating whether another wireless device to establish a connection with the first wireless device is selected by the network or selected by the first wireless device receiving information about the mode from the network; identifying a second wireless device determined based on the selection mode; and establishing a connection with the second wireless device.
- FIG 11 shows an example of a method performed by a base station according to an embodiment of the present disclosure.
- the base station may receive information on the first wireless device from the first wireless device.
- the base station indicates, based on the information on the first wireless device, whether another wireless device to establish a connection with the first wireless device is selected by the network or is selected by the first wireless device
- the selection mode can be determined.
- the base station may transmit information on the selection mode to the first wireless device.
- the remote UE When the remote UE is not in a connected state (ie, in an IDLE or INACTIVE state), the remote UE may select a relay UE by itself according to a preset criterion.
- the remote UE may transmit information about the remote UE to the base station. For example, information on the remote UE may be transmitted through a SidelinkUEInformation message.
- the information on the remote UE may include information indicating whether the remote UE is a power saving UE and/or information on the remaining battery/power of the remote UE.
- the base station may inform whether the remote UE directly selects the relay UE through RRC (re)configuration, or whether the base station selects the relay UE for the remote UE.
- the remote UE selects the relay UE by itself, since the remote UE does not need to report the sidelink signal strength (e.g., SL-RSRP) and/or ID of the candidate relay UE to the base station, the power consumption of the remote UE can be reduced. there is. Furthermore, when the remote UE itself selects the relay UE, there may be an advantage in terms of latency.
- the sidelink signal strength e.g., SL-RSRP
- the remote UE when the base station selects a relay UE for the remote UE, the remote UE must report the candidate relay UE ID and/or sidelink signal strength to the base station periodically/aperiodically, so power consumption for reporting may occur and , there may be disadvantages in terms of delay.
- the base station can select the relay UE, an optimized operation is possible in terms of the entire network.
- the RRC (re)configuration information transmitted by the base station to the remote UE is information informing/indicating that the remote UE selects a relay UE by itself (eg, 'relay selection enable (Relay selection enable)' and/or information about the selection mode).
- the remote UE receiving the RRC (re)configuration message in which 'relay selection activation' is 'set/instructed' may select the relay UE by itself. If the selected relay UE belongs to a cell different from that of the remote UE, the remote UE may transmit a message for requesting a handover to the gNB. In this case, the remote UE may transmit the ID of the selected relay UE and/or the cell ID to which the selected relay UE belongs.
- the base station may implicitly inform the remote UE that the remote UE can or must select the relay UE itself. For example, if you include a setting not to report sidelink signal strength (SL-RSRP) measurements in the RRC (re)configuration message instead of the 'relay selection activation' signal, the remote UE implicitly indicates that the remote UE is a relay UE may be determined to be selectable, and may select a relay UE by itself.
- SL-RSRP sidelink signal strength
- the remote UE that has received the RRC (re)configuration in which 'relay selection activation' is not 'configured/indicated' may determine that the base station selects the relay UE.
- the remote UE may report the sidelink signal strength of the candidate relay UE and/or the ID of the candidate relay UE to the base station according to a period set by the base station.
- the remote UE may be configured to report the sidelink signal strength of the candidate relay UE and/or the ID of the candidate relay UE according to a period set by the base station from then on.
- the RRC (re)configuration message measures the sidelink signal strength (SL-RSRP) of the candidate relay UE, and the sidelink signal strength (SL-RSRP) of the candidate relay UE and the candidate relay
- the remote UE may implicitly determine that the gNB selects the relay UE instead, and may not select the relay UE itself.
- the RRC (re)configuration message is the sidelink signal strength of the candidate relay UE (SL-RSRP)
- SL-RSRP sidelink signal strength of the candidate relay UE
- the remote UE may select the relay UE before receiving the handover command to establish a PC5 connection.
- An operation in which the remote UE directly selects the relay UE is described with reference to FIG. 12 .
- FIG. 12 shows an example of a procedure for a remote UE to directly select a relay UE according to an embodiment of the present disclosure.
- the remote UE measures the sidelink signal strength, and selects a relay UE to establish a connection to the remote UE from among candidate relay UEs whose measured signal strength is higher than a (pre)set threshold. there is.
- the remote UE may establish a PC5 connection with the selected relay UE.
- step S1203 if the serving cell of the relay UE with which the remote UE has established the PC5 connection is different from the serving cell of the remote UE, a handover may be requested for the remote UE, and the remote UE determines to handover to the target gNB.
- the target gNB may correspond to the serving cell of the relay UE.
- the remote UE may transmit a handover recommendation message to the gNB.
- the handover recommendation message may include at least one of the ID of the relay UE that has established a PC5 connection with the remote UE or the ID of the relay UE's serving cell (the cell in which the relay UE camps-on when the relay UE is in the idle state). there is.
- the remote UE that has transmitted the handover recommendation message may stop performing measurement.
- the gNB may determine a handover to the target gNB. Then, in step S1209, the gNB may send a handover request message to the target gNB, and in step S1211, the gNB may receive a handover grant message from the target gNB.
- the handover grant message may include RRC reconfiguration for handover to the target gNB.
- the gNB rejects the handover, or when the gNB sends a handover request message to the target gNB but does not receive a handover grant message from the target gNB, at least one of the following operations may be performed:
- the gNB may inform the remote UE that the handover to the serving cell/camping cell of the relay UE in which the remote UE has established a PC5 connection has failed.
- the remote UE may notify the relay UE selected by the remote UE that the PC5 connection/link is released due to handover failure. Accordingly, the selected relay UE may release the PC5 link established for operation with the remote UE.
- the remote UE may release the PC5 connection with the relay UE selected by the remote UE.
- the remote UE may perform a re-establishment procedure to remove handover related information received from the serving gNB.
- the remote UE may perform step S1205.
- step S1213 if handover is permitted by the target gNB, the serving gNB may transmit an RRC reconfiguration message received from the target gNB to the remote UE for handover to the target gNB.
- the remote UE may transmit an RRC reconfiguration complete message to the target gNB through the relay UE, and the handover may be completed.
- the remote UE may receive the handover command and establish a PC5 connection with the relay UE.
- An operation in which the serving gNB selects a relay UE is described in FIG. 13 .
- FIG. 13 shows an example of a procedure for a base station to select a relay UE according to an embodiment of the present disclosure.
- the remote UE may transmit a list of candidate relay UEs whose sidelink signal strength is greater than or equal to a (pre)set threshold to the gNB.
- the sidelink signal strength and cell ID information of the candidate relay UE may be transmitted together.
- the serving gNB of the remote UE may select a relay UE from among the candidate relay UEs based on the information received in step S1301. If the cell ID of the selected relay UE is different from the cell ID of the remote UE, the serving gNB may determine handover to the target gNB.
- the target gNB may correspond to the cell ID of the selected relay UE.
- the serving gNB may send a handover request message to the target gNB.
- the serving gNB may receive a handover grant message from the target gNB.
- the handover grant message may include RRC reconfiguration for handover to the target gNB.
- the serving gNB may deliver an RRC reconfiguration message to the remote UE as a handover command.
- the RRC reconfiguration message may include the ID of the relay UE selected by the gNB.
- the remote UE may establish a PC5 connection with the relay UE. However, for reasons such as access control of the relay UE, the remote UE may be refused to establish a PC5 connection with the relay UE. In this case, the remote UE may perform at least one of the following operations:
- the remote UE may notify the serving cell of the remote UE that handover cannot be performed due to reasons such as access control of the relay UE.
- the remote UE may report the information of the neighboring candidate relay UE together with the sidelink signal strength to the gNB (measurement and report). This information may include information indicating that handover cannot be performed due to reasons such as access control of the relay UE. In addition, the remote UE may measure the signal strength of another cell and report the measurement result to the gNB.
- the handover timer (eg, T304 timer) may be stopped, and a re-establishment procedure may be performed to remove the handover information received from the serving gNB.
- the remote UE may start a handover timer (eg, T304 timer) after receiving a handover command (or RRC reset message).
- the handover timer may be used to perform an operation such as random access to a target cell for handover.
- the handover timer may operate differently.
- the handover timer may be ignored.
- the handover timer or similar timer may be reset/stopped. .
- the timer value of the handover timer or similar timer may be set to a larger value than the existing value in consideration of the operation time for the remote UE to find a new candidate relay UE.
- the relay UE (re)selection operation may be continued.
- the remote UE may transmit an RRC reconfiguration complete message to the target gNB through the relay UE.
- FIG. 14 shows an example of a procedure for a remote UE and a base station to select a relay UE together according to an embodiment of the present disclosure.
- the remote UE may transmit information on the list of candidate relay UEs discovered by the remote UE to the serving gNB.
- the cell ID of the cell to which the candidate relay UE belongs and/or information on the RRC state of the candidate relay UE may be transmitted together.
- the serving gNB may determine that a handover is required for the remote UE to establish a PC5 connection with the candidate relay UE.
- the serving gNB may send a handover request message to gNBs in which the candidate relay UE is in a connected state (or the candidate relay UE is camp-on).
- the serving gNB should send a handover request message to the corresponding gNB.
- the handover request message may include an indicator indicating that the remote UE will establish a connection with a relay UE belonging to a corresponding gNB for handover (ie, an indicator indicating indirect handover activation).
- the serving gNB may receive a handover acknowledgment message from the gNB in which each candidate relay UE is in a connected state or is camp-on.
- each candidate relay UE sends an RRC (re)configuration message including a list of RRC (re)configurations included in the handover grant message received from the gNB in the connected state or camp-on to the remote UE.
- Each RRC (re)configuration in the RRC reconfiguration message and/or list may include the ID of the candidate relay UE.
- Candidate relay UE IDs may be sorted according to priority in the RRC (re)configuration message.
- the remote UE may select a relay UE from the received RRC (re)configuration list.
- the remote UE may select one relay UE from among the handover capable candidate relay UEs identified in the RRC (re)configuration message received from the gNB.
- the remote UE may establish a PC5 connection with the selected relay UE.
- the remote UE selects another relay UE from the received RRC (re)configuration list (and / Alternatively, another relay UE may be selected from among the candidate relay UEs capable of handover identified in the RRC (re)configuration message), and PC5 connection establishment may be attempted with another selected relay UE.
- Step S1411 may be set to be performed until the handover timer expires.
- the remote UE may transmit an RRC (re)configuration complete message to the target gNB through the selected relay UE.
- FIG. 15 shows a communication system 1 according to an embodiment of the present disclosure.
- a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network.
- the wireless device refers to a device that performs communication using a radio access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
- the wireless device may include a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 .
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
- UAV Unmanned Aerial Vehicle
- XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like.
- Home appliances may include a TV, a refrigerator, a washing machine, and the like.
- the IoT device may include a sensor, a smart meter, and the like.
- the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to other wireless devices.
- the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
- AI Artificial Intelligence
- the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network.
- the wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (e.g. sidelink communication) without passing through the base station/network.
- the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. Vehicle to Vehicle (V2V)/Vehicle to everything (V2X) communication).
- the IoT device eg, sensor
- the IoT device may communicate directly with other IoT devices (eg, sensor) or other wireless devices 100a to 100f.
- Wireless communication/connection 150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200 .
- the wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), communication between base stations 150c (e.g. relay, IAB (Integrated Access Backhaul), etc.)
- This can be done through technology (eg 5G NR)
- Wireless communication/connection 150a, 150b, 150c allows the wireless device and the base station/radio device, and the base station and the base station to transmit/receive wireless signals to each other.
- the wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
- various signal processing processes eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
- resource allocation processes etc.
- FIG. 16 illustrates a wireless device according to an embodiment of the present disclosure.
- the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR).
- ⁇ first wireless device 100, second wireless device 200 ⁇ is ⁇ wireless device 100x, base station 200 ⁇ of FIG. 15 and/or ⁇ wireless device 100x, wireless device 100x) ⁇ can be matched.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 .
- the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
- the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 .
- the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store the information obtained from the signal processing of the second information/signal in the memory 104 .
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
- memory 104 may provide instructions for performing some or all of the processes controlled by processor 102 , or for performing descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- a wireless communication technology eg, LTE, NR
- the transceiver 106 may be coupled to the processor 102 , and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- RF radio frequency
- a wireless device may refer to a communication modem/circuit/chip.
- the second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 .
- the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed herein.
- the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 .
- the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 .
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
- the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202, or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
- the transceiver 206 may include a transmitter and/or a receiver.
- the transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may refer to a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors 102 , 202 .
- one or more processors 102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- the one or more processors 102, 202 are configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- One or more processors 102 , 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed herein.
- the one or more processors 102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , to one or more transceivers 106 and 206 .
- the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , and may be described, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein.
- PDUs, SDUs, messages, control information, data, or information may be acquired according to the fields.
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
- One or more processors 102 , 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- firmware or software may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
- the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed in this document provide that firmware or software configured to perform is contained in one or more processors 102 , 202 , or stored in one or more memories 104 , 204 . It may be driven by the above processors 102 and 202 .
- the descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or a set of instructions.
- One or more memories 104 , 204 may be coupled with one or more processors 102 , 202 , and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions.
- the one or more memories 104 and 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104 , 204 may be located inside and/or external to one or more processors 102 , 202 . Additionally, one or more memories 104 , 204 may be coupled to one or more processors 102 , 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of this document to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or flow charts, etc. disclosed herein, from one or more other devices. there is.
- one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may transmit and receive wireless signals.
- one or more processors 102 , 202 may control one or more transceivers 106 , 206 to transmit user data, control information, or wireless signals to one or more other devices.
- one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, or wireless signals from one or more other devices.
- one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208, and the one or more transceivers 106, 206 may be coupled via one or more antennas 108, 208 to the descriptions, functions, and functions disclosed herein. , may be set to transmit and receive user data, control information, radio signals/channels, etc.
- one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
- the one or more transceivers 106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or more processors 102, 202. It can be converted into a baseband signal.
- One or more transceivers 106 , 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 , 202 from baseband signals to RF band signals.
- one or more transceivers 106 , 206 may include (analog) oscillators and/or filters.
- the first wireless device 100 and/or the one or more processors 102 may be configured to implement operations performed by the wireless device/UE in the present disclosure.
- the one or more processors 102 may control the one or more transceivers 106 to transmit information about the first wireless device to a network.
- One or more processors 102 control one or more transceivers 106 to transmit information about the first wireless device to the network, and then, after another wireless device to establish a connection with the first wireless device, connect to the network.
- Information on the selection mode indicating whether selected by or by the first wireless device may be received from the network.
- the one or more processors 102 may identify the determined second wireless device based on the selection mode.
- One or more processors 102 may establish a connection with the second wireless device.
- the second wireless device 200 and/or the one or more processors 202 may be configured to implement operations performed by a base station (eg, a mobility source/target base station) in the present disclosure.
- the one or more processors 202 may control the one or more transceivers 206 to receive, from a wireless device, information about the wireless device.
- the one or more processors 202 may determine, based on information about the wireless device, a selection mode indicating whether another wireless device to establish a connection with the wireless device is selected by the network or is selected by the wireless device. there is.
- One or more processors 202 may control one or more transceivers 206 to transmit information about the selected mode to the wireless device.
- FIG. 17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
- the signal processing circuit 1000 may include a scrambler 1010 , a modulator 1020 , a layer mapper 1030 , a precoder 1040 , a resource mapper 1050 , and a signal generator 1060 .
- the operations/functions of FIG. 17 may be performed by the processors 102 and 202 and/or the transceivers 106 and 206 of FIG. 16 .
- the hardware elements of FIG. 17 may be implemented in processors 102 , 202 and/or transceivers 106 , 206 of FIG. 16 .
- blocks 1010 to 1060 may be implemented in the processors 102 and 202 of FIG. 16 .
- blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 16
- block 1060 may be implemented in the transceivers 106 and 206 of FIG. 16 .
- the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 17 .
- the codeword is a coded bit sequence of an information block.
- the information block may include a transport block (eg, a UL-SCH transport block, a DL-SCH transport block).
- the radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH).
- the codeword may be converted into a scrambled bit sequence by the scrambler 1010 .
- a scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of a wireless device, and the like.
- the scrambled bit sequence may be modulated by a modulator 1020 into a modulation symbol sequence.
- the modulation method may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), and the like.
- the complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030 .
- Modulation symbols of each transport layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding).
- the output z of the precoder 1040 may be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M.
- N is the number of antenna ports
- M is the number of transport layers.
- the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transform) on the complex modulation symbols. Also, the precoder 1040 may perform precoding without performing transform precoding.
- the resource mapper 1050 may map modulation symbols of each antenna port to a time-frequency resource.
- the time-frequency resource may include a plurality of symbols (eg, a CP-OFDMA symbol, a DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain.
- CP Cyclic Prefix
- DAC Digital-to-Analog Converter
- a signal processing process for a received signal in the wireless device may be configured in reverse of the signal processing process 1010 to 1060 of FIG. 17 .
- the wireless device eg, 100 and 200 in FIG. 16
- the received radio signal may be converted into a baseband signal through a signal restorer.
- the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module.
- ADC analog-to-digital converter
- FFT Fast Fourier Transform
- the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a descrambling process.
- the codeword may be restored to the original information block through decoding.
- the signal processing circuit (not shown) for the received signal may include a signal restorer, a resource de-mapper, a post coder, a demodulator, a descrambler, and a decoder.
- the wireless device may be implemented in various forms according to use-examples/services (refer to FIG. 15 ).
- wireless devices 100 and 200 correspond to wireless devices 100 and 200 of FIG. 16 , and various elements, components, units/units, and/or modules ) can be composed of
- the wireless devices 100 and 200 may include a communication unit 110 , a control unit 120 , a memory unit 130 , and an additional element 140 .
- the communication unit may include communication circuitry 112 and transceiver(s) 114 .
- communication circuitry 112 may include one or more processors 102 , 202 and/or one or more memories 104 , 204 of FIG. 16 .
- transceiver(s) 114 may include one or more transceivers 106 , 206 and/or one or more antennas 108 , 208 of FIG.
- the control unit 120 is electrically connected to the communication unit 110 , the memory unit 130 , and the additional element 140 , and controls general operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130 . In addition, the control unit 120 transmits information stored in the memory unit 130 to the outside (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or externally (eg, through the communication unit 110 ) Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130 .
- the outside eg, other communication device
- Information received through a wireless/wired interface from another communication device may be stored in the memory unit 130 .
- the additional element 140 may be configured in various ways according to the type of the wireless device.
- the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit.
- a wireless device may include a robot ( FIGS. 15 and 100a ), a vehicle ( FIGS. 15 , 100b-1 , 100b-2 ), an XR device ( FIGS. 15 and 100c ), a mobile device ( FIGS. 15 and 100d ), and a home appliance. (FIG. 15, 100e), IoT device (FIG.
- digital broadcasting terminal digital broadcasting terminal
- hologram device public safety device
- MTC device medical device
- fintech device or financial device
- security device climate/environment device
- It may be implemented in the form of an AI server/device ( FIGS. 15 and 400 ), a base station ( FIGS. 15 and 200 ), and a network node.
- the wireless device may be mobile or used in a fixed location depending on the use-example/service.
- various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110 .
- the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130 and 140 ) are connected to the communication unit 110 through the communication unit 110 . It can be connected wirelessly.
- each element, component, unit/unit, and/or module within the wireless device 100 , 200 may further include one or more elements.
- the controller 120 may be configured with one or more processor sets.
- control unit 120 may be configured as a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, a memory control processor, and the like.
- memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
- FIG. 18 will be described in more detail with reference to the drawings.
- the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), and a portable computer (eg, a laptop computer).
- a mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
- MS mobile station
- UT user terminal
- MSS mobile subscriber station
- SS subscriber station
- AMS advanced mobile station
- WT wireless terminal
- the portable device 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a memory unit 130 , a power supply unit 140a , an interface unit 140b , and an input/output unit 140c .
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 18 .
- the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
- the controller 120 may perform various operations by controlling the components of the portable device 100 .
- the controller 120 may include an application processor (AP).
- the memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the portable device 100 . Also, the memory unit 130 may store input/output data/information.
- the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
- the interface unit 140b may support a connection between the portable device 100 and other external devices.
- the interface unit 140b may include various ports (eg, an audio input/output port and a video input/output port) for connection with an external device.
- the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
- the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
- the input/output unit 140c obtains information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130 . can be saved.
- the communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and transmit the converted wireless signal directly to another wireless device or to a base station. Also, after receiving a radio signal from another radio device or base station, the communication unit 110 may restore the received radio signal to original information/signal. After the restored information/signal is stored in the memory unit 130 , it may be output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.
- various forms eg, text, voice, image, video, haptic
- the vehicle or autonomous driving vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, and the like.
- AV aerial vehicle
- the vehicle or autonomous driving vehicle 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a driving unit 140a , a power supply unit 140b , a sensor unit 140c and autonomous driving. It may include a part 140d.
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110/130/140a-140d correspond to blocks 110/130/140 of FIG. 18, respectively.
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), servers, and the like.
- the controller 120 may control elements of the vehicle or the autonomous driving vehicle 100 to perform various operations.
- the controller 120 may include an Electronic Control Unit (ECU).
- the driving unit 140a may cause the vehicle or the autonomous driving vehicle 100 to run on the ground.
- the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
- the power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 , and may include a wired/wireless charging circuit, a battery, and the like.
- the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
- the sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, and a vehicle forward movement.
- IMU inertial measurement unit
- a collision sensor a wheel sensor
- a speed sensor a speed sensor
- an inclination sensor a weight sensor
- a heading sensor a position module
- a vehicle forward movement / may include a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, and the like.
- the autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set. technology can be implemented.
- the communication unit 110 may receive map data, traffic information data, and the like from an external server.
- the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
- the controller 120 may control the driving unit 140a to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving path (eg, speed/direction adjustment) according to the driving plan.
- the communication unit 110 may obtain the latest traffic information data from an external server non/periodically, and may acquire surrounding traffic information data from surrounding vehicles.
- the sensor unit 140c may acquire vehicle state and surrounding environment information.
- the autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly acquired data/information.
- the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
- the external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and may provide the predicted traffic information data to the vehicle or autonomous vehicles.
- a selection subject of a relay UE for mobility may be efficiently determined according to a situation, and a mobility procedure to the relay UE may be optimized.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
| SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
| 15KHz (u=0) | 14 | 10 | 1 |
| 30KHz (u=1) | 14 | 20 | 2 |
| 60KHz (u=2) | 14 | 40 | 4 |
| 120KHz (u=3) | 14 | 80 | 8 |
| 240KHz (u=4) | 14 | 160 | 16 |
| SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
| 60KHz (u=2) | 12 | 40 | 4 |
| Frequency Range designation | Corresponding frequency range | Subcarrier Spacing (SCS) |
| FR1 | 450MHz - 6000MHz | 15, 30, 60kHz |
| FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
| Frequency Range designation | Corresponding frequency range | Subcarrier Spacing (SCS) |
| FR1 | 410MHz - 7125MHz | 15, 30, 60kHz |
| FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
Claims (18)
- 무선 통신 시스템에서 제1 무선 장치에 의해 수행되는 방법에 있어서,네트워크로, 상기 제1 무선 장치에 대한 정보를 송신하는 과정과,상기 제1 무선 장치에 대한 정보를 상기 네트워크로 송신한 후, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택되는지 또는 상기 제1 무선 장치에 의해 선택되는지를 지시하는 선택 모드에 대한 정보를 상기 네트워크로부터 수신하는 과정과,상기 선택 모드에 기반하여 결정된 제2 무선 장치를 식별하는 과정과,상기 제2 무선 장치와 연결을 설립하는 과정을 포함하는 방법.
- 청구항 1에 있어서, 상기 제1 무선 장치에 대한 정보는, 상기 제1 무선 장치가 저전력 장치인지 여부를 지시하는 정보 또는 상기 제1 무선 장치의 배터리 잔량에 대한 정보 중 적어도 하나를 포함하는 방법.
- 청구항 1에 있어서, 상기 선택 모드는 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 제1 무선 장치에 의해 선택됨을 지시하고,상기 제2 무선 장치를 식별하는 과정은, 상기 선택 모드에 기반하여 상기 제2 무선 장치를 선택하는 과정을 포함하는 방법.
- 청구항 3에 있어서, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 제1 무선 장치에 의해 선택됨을 지시하는 선택 모드에 대한 정보는, 사이드링크에 대한 측정 결과를 보고하지 않도록 하는 설정에 대응하는 방법.
- 청구항 3에 있어서, 상기 제2 무선 장치를 선택하는 과정은,사이드링크 신호 세기를 측정하는 과정과,측정된 사이드링크 신호 세기가 설정된 임계 값보다 높은 하나 이상의 후보 무선 장치들을 식별하는 과정과,상기 하나 이상의 무선 장치들 중에서 상기 제2 무선 장치를 선택하는 과정을 포함하는 방법.
- 청구항 3에 있어서, 상기 제2 무선 장치에 대한 서빙 셀이 상기 제1 무선 장치에 대한 서빙 셀과 다른 경우, 모빌리티 요청 메시지를 상기 제1 무선 장치에 대한 서빙 셀로 송신하는 과정을 더 포함하고,상기 모빌리티 요청 메시지는 상기 제2 무선 장치의 식별자 또는 상기 제2 무선 장치에 대한 서빙 셀의 셀 식별자 중 적어도 하나를 포함하고,상기 제2 무선 장치에 대한 서빙 셀은 모빌리티를 위한 타겟 셀인 방법.
- 청구항 6에 있어서, 상기 모빌리티 요청 메시지에 대한 응답으로 모빌리티 실패 메시지를 상기 제1 무선 장치에 대한 서빙 셀로부터 수신하는 과정과,상기 제2 무선 장치와의 연결을 해제하는 과정과,제3 무선 장치와 연결을 설립하는 과정을 더 포함하는 방법.
- 청구항 6에 있어서, 상기 모빌리티 요청 메시지에 대한 응답으로 상기 타겟 셀로의 모빌리티를 위한 모빌리티 명령(command)을 상기 제1 무선 장치에 대한 서빙 셀로부터 수신하는 과정과,상기 모빌리티 명령에 포함된 타겟 셀 설정을 적용하는 과정과,상기 타겟 셀 설정을 적용한 후, 상기 제2 무선 장치를 통해 모빌리티 완료 메시지를 상기 타겟 셀로 송신하는 과정을 더 포함하는 방법.
- 청구항 1에 있어서, 상기 선택 모드는 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택됨을 지시하고,상기 제2 무선 장치를 식별하는 과정은, 상기 제2 무선 장치의 식별자를 포함하는 모빌리티 명령(command)을 상기 네트워크로부터 수신하는 과정을 포함하는 방법.
- 청구항 9에 있어서, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택됨을 지시하는 선택 모드에 대한 정보는, 사이드링크에 대한 측정 결과를 보고하지 않도록 하는 설정에 대응하는 방법.
- 청구항 9에 있어서, 사이드링크 신호 세기를 측정하는 과정과,측정된 사이드링크 신호 세기가 설정된 임계 값보다 높은 하나 이상의 후보 무선 장치들을 식별하는 과정과,상기 하나 이상의 후보 무선 장치들의 리스트 및 상기 하나 이상의 후보 무선 장치들에 대한 사이드링크 신호 세기에 대한 정보를 상기 네트워크로 송신하는 과정을 더 포함하고,상기 제2 무선 장치는, 상기 네트워크에 의해 상기 하나 이상의 후보 무선 장치들의 리스트에서 상기 사이드링크 신호 세기에 기반하여 선택되는 방법.
- 청구항 9에 있어서, 상기 모빌리티 명령을 포함하는 복수의 모빌리티 명령들을 수신하는 과정을 더 포함하고, 각각의 상기 복수의 모빌리티 명령들은 대응되는 무선 장치와 관련되고,상기 제2 무선 장치를 식별하는 과정은, 상기 복수의 모빌리티 명령들과 관련된 복수의 무선 장치들 중에서 상기 제2 무선 장치를 선택하는 과정을 포함하는 방법.
- 청구항 1에 있어서, 상기 제1 무선 장치는 UE(user equipment), 네트워크 또는 자율 차량(vehicle) 중 적어도 하나와 통신하는 방법.
- 무선 통신 시스템에서 제1 무선 장치에 있어서,송수신기;메모리; 및상기 송수신기 및 상기 메모리에 기능적으로 결합된 적어도 하나의 프로세서를 포함하고,상기 적어도 하나의 프로세서는,상기 송수신기를 제어하여, 네트워크로, 상기 제1 무선 장치에 대한 정보를 송신하고,상기 송수신기를 제어하여, 상기 제1 무선 장치에 대한 정보를 상기 네트워크로 송신한 후, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택되는지 또는 상기 제1 무선 장치에 의해 선택되는지를 지시하는 선택 모드에 대한 정보를 상기 네트워크로부터 수신하고,상기 선택 모드에 기반하여 결정된 제2 무선 장치를 식별하고,상기 제2 무선 장치와 연결을 설립하도록 설정된 장치.
- 무선 통신 시스템에서 제1 무선 장치에 대한 프로세서에 있어서, 상기 제1 무선 장치의 메모리는 상기 프로세서에 의해 실행되었을 때 동작들을 수행하는 명령들(instructions)을 구현하는 소프트웨어 코드를 저장하고, 상기 동작들은,네트워크로, 상기 제1 무선 장치에 대한 정보를 송신하는 동작과,상기 제1 무선 장치에 대한 정보를 상기 네트워크로 송신한 후, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택되는지 또는 상기 제1 무선 장치에 의해 선택되는지를 지시하는 선택 모드에 대한 정보를 상기 네트워크로부터 수신하는 동작과,상기 선택 모드에 기반하여 결정된 제2 무선 장치를 식별하는 동작과,상기 제2 무선 장치와 연결을 설립하는 동작을 포함하는 프로세서.
- 복수의 명령들(instructions)을 저장하고 있는 비일시적(non-transitory) 컴퓨터 판독 가능 매체(computer readable medium, CRM)에 있어서, 상기 복수의 명령들은 제1 무선 장치의 프로세서에 의해 실행되었을 때 상기 제1 무선 장치가 동작들을 수행하도록 하고, 상기 동작들은,네트워크로, 상기 제1 무선 장치에 대한 정보를 송신하는 동작과,상기 제1 무선 장치에 대한 정보를 상기 네트워크로 송신한 후, 상기 제1 무선 장치와 연결을 설립할 다른 무선 장치가 상기 네트워크에 의해 선택되는지 또는 상기 제1 무선 장치에 의해 선택되는지를 지시하는 선택 모드에 대한 정보를 상기 네트워크로부터 수신하는 동작과,상기 선택 모드에 기반하여 결정된 제2 무선 장치를 식별하는 동작과,상기 제2 무선 장치와 연결을 설립하는 동작을 포함하는 CRM.
- 무선 통신 시스템에서 기지국에 의해 수행되는 방법에 있어서,무선 장치로부터, 상기 무선 장치에 대한 정보를 수신하는 과정과,상기 무선 장치에 대한 정보에 기반하여, 상기 무선 장치와 연결을 설립할 다른 무선 장치가 네트워크에 의해 선택되는지 또는 상기 무선 장치에 의해 선택되는지를 지시하는 선택 모드를 결정하는 과정과,상기 선택 모드에 대한 정보를 상기 무선 장치로 송신하는 과정을 포함하는 방법.
- 무선 통신 시스템에서 기지국에 있어서,송수신기;메모리; 및상기 송수신기 및 상기 메모리에 기능적으로 결합된 적어도 하나의 프로세서를 포함하고,상기 적어도 하나의 프로세서는,상기 송수신기를 제어하여, 무선 장치로부터, 상기 무선 장치에 대한 정보를 수신하고,상기 무선 장치에 대한 정보에 기반하여, 상기 무선 장치와 연결을 설립할 다른 무선 장치가 네트워크에 의해 선택되는지 또는 상기 무선 장치에 의해 선택되는지를 지시하는 선택 모드를 결정하고,상기 송수신기를 제어하여, 상기 선택 모드에 대한 정보를 상기 무선 장치로 송신하도록 설정된 기지국.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020237009104A KR20230092875A (ko) | 2020-10-22 | 2021-10-22 | 무선 통신 시스템에서 모빌리티를 수행하기 위한 방법 및 장치 |
| US18/028,692 US20230363020A1 (en) | 2020-10-22 | 2021-10-22 | Method and apparatus for performing mobility in wireless communication system |
| JP2023523100A JP2023546577A (ja) | 2020-10-22 | 2021-10-22 | 無線通信システムにおけるモビリティを実行するための方法及び装置 |
| EP21883349.9A EP4236471B1 (en) | 2020-10-22 | 2021-10-22 | Method and apparatus for performing mobility in wireless communication system |
| CN202180072189.3A CN116368862A (zh) | 2020-10-22 | 2021-10-22 | 在无线通信系统中执行移动性的方法和设备 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202063104495P | 2020-10-22 | 2020-10-22 | |
| US63/104,495 | 2020-10-22 | ||
| US202063111074P | 2020-11-08 | 2020-11-08 | |
| US63/111,074 | 2020-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022086282A1 true WO2022086282A1 (ko) | 2022-04-28 |
Family
ID=81289991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2021/014936 Ceased WO2022086282A1 (ko) | 2020-10-22 | 2021-10-22 | 무선 통신 시스템에서 모빌리티를 수행하기 위한 방법 및 장치 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230363020A1 (ko) |
| EP (1) | EP4236471B1 (ko) |
| JP (1) | JP2023546577A (ko) |
| KR (1) | KR20230092875A (ko) |
| CN (1) | CN116368862A (ko) |
| WO (1) | WO2022086282A1 (ko) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240015619A1 (en) * | 2022-06-30 | 2024-01-11 | Asus Technology Licensing Inc. | Method and apparatus for supporting inter-gnb direct-to-indirect path switching for ue-to-nw relay communication in a wireless communication system |
| EP4535919A4 (en) * | 2022-06-01 | 2026-01-14 | Sharp Kk | METHOD PERFORMED BY USER EQUIPMENT, AND USER EQUIPMENT |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12557166B2 (en) * | 2020-12-18 | 2026-02-17 | Lenovo (Beijing) Limited | Method and apparatus for path switch in a wireless communication system |
| CN115150904B (zh) * | 2021-03-30 | 2024-06-04 | 维沃移动通信有限公司 | 通信路径的切换方法、装置及终端 |
| CN117280750A (zh) * | 2021-05-10 | 2023-12-22 | 联想(北京)有限公司 | 用于ue到网络中继切换的方法及设备 |
| CN115707147A (zh) * | 2021-08-06 | 2023-02-17 | 中兴通讯股份有限公司 | 无线网络通信方法、电子设备及存储介质 |
| US12375902B2 (en) * | 2022-04-28 | 2025-07-29 | Qualcomm Incorporated | Network coordination during path switching and multi-path scenarios |
| US20250301403A1 (en) * | 2024-03-25 | 2025-09-25 | Verizon Patent And Licensing Inc. | Systems and methods for intelligent repeater offload in a radio access network |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017052569A1 (en) * | 2015-09-25 | 2017-03-30 | Nokia Solutions And Networks Oy | Initiating and selecting a relay ue for d2d communications |
| KR20180080272A (ko) * | 2015-11-05 | 2018-07-11 | 소니 주식회사 | 무선 통신 시스템 내의 전자 디바이스 및 무선 통신 방법 |
| US20190159011A1 (en) * | 2016-05-19 | 2019-05-23 | Sony Corporation | Electronic apparatus, information processing device and information processing method |
| EP3618391A1 (en) * | 2017-04-28 | 2020-03-04 | ZTE Corporation | Relay discovery and relay forwarding method and device and storage medium |
| KR20200088209A (ko) * | 2019-01-11 | 2020-07-22 | 아서스테크 컴퓨터 인코포레이션 | 무선 통신 시스템에서 사이드링크 자원 할당 모드 구성을 위한 방법 및 장치 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018085545A (ja) * | 2015-03-25 | 2018-05-31 | シャープ株式会社 | 端末装置、基地局装置、通信システム、通信方法および集積回路 |
| WO2018010123A1 (zh) * | 2016-07-13 | 2018-01-18 | 华为技术有限公司 | 通信方法、网络设备和终端设备 |
| JP7455820B2 (ja) * | 2018-09-26 | 2024-03-26 | インターデイジタル パテント ホールディングス インコーポレイテッド | Nr-u lbt mac手順 |
| US11800599B2 (en) * | 2020-04-03 | 2023-10-24 | Electronics And Telecommunications Research Institute | Method for discovering and selecting relay user equipment in communication system |
| CN115699985B (zh) * | 2020-04-09 | 2026-03-31 | 诺基亚技术有限公司 | 新无线电(nr)侧链(sl)中监测pc5到无线电资源控制(rrc)配置过程的增强 |
| WO2022067651A1 (en) * | 2020-09-30 | 2022-04-07 | Lenovo (Beijing) Limited | Methods and apparatuses for a relay reselection and data transmission handling procedure in a ue-to-network relay scenario |
-
2021
- 2021-10-22 US US18/028,692 patent/US20230363020A1/en active Pending
- 2021-10-22 JP JP2023523100A patent/JP2023546577A/ja active Pending
- 2021-10-22 KR KR1020237009104A patent/KR20230092875A/ko active Pending
- 2021-10-22 CN CN202180072189.3A patent/CN116368862A/zh active Pending
- 2021-10-22 WO PCT/KR2021/014936 patent/WO2022086282A1/ko not_active Ceased
- 2021-10-22 EP EP21883349.9A patent/EP4236471B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017052569A1 (en) * | 2015-09-25 | 2017-03-30 | Nokia Solutions And Networks Oy | Initiating and selecting a relay ue for d2d communications |
| KR20180080272A (ko) * | 2015-11-05 | 2018-07-11 | 소니 주식회사 | 무선 통신 시스템 내의 전자 디바이스 및 무선 통신 방법 |
| US20190159011A1 (en) * | 2016-05-19 | 2019-05-23 | Sony Corporation | Electronic apparatus, information processing device and information processing method |
| EP3618391A1 (en) * | 2017-04-28 | 2020-03-04 | ZTE Corporation | Relay discovery and relay forwarding method and device and storage medium |
| KR20200088209A (ko) * | 2019-01-11 | 2020-07-22 | 아서스테크 컴퓨터 인코포레이션 | 무선 통신 시스템에서 사이드링크 자원 할당 모드 구성을 위한 방법 및 장치 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4236471A4 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4535919A4 (en) * | 2022-06-01 | 2026-01-14 | Sharp Kk | METHOD PERFORMED BY USER EQUIPMENT, AND USER EQUIPMENT |
| US20240015619A1 (en) * | 2022-06-30 | 2024-01-11 | Asus Technology Licensing Inc. | Method and apparatus for supporting inter-gnb direct-to-indirect path switching for ue-to-nw relay communication in a wireless communication system |
| US12294903B2 (en) * | 2022-06-30 | 2025-05-06 | Asus Technology Licensing Inc. | Method and apparatus for supporting inter-GNB direct-to-indirect path switching for UE-to-NW relay communication in a wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4236471B1 (en) | 2025-10-01 |
| EP4236471A1 (en) | 2023-08-30 |
| KR20230092875A (ko) | 2023-06-26 |
| US20230363020A1 (en) | 2023-11-09 |
| JP2023546577A (ja) | 2023-11-06 |
| EP4236471A4 (en) | 2024-03-27 |
| CN116368862A (zh) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020231201A1 (ko) | Nr v2x에서 복수의 자원을 스케줄링하는 방법 및 장치 | |
| WO2020226372A1 (ko) | Nr v2x에서 사이드링크 참조 신호를 전송하는 방법 및 장치 | |
| WO2022086282A1 (ko) | 무선 통신 시스템에서 모빌리티를 수행하기 위한 방법 및 장치 | |
| WO2020204630A1 (ko) | Nr v2x에서 사이드링크 채널과 관련된 정보를 전송하는 방법 및 장치 | |
| WO2020190069A1 (ko) | Sl csi 보고 | |
| WO2020204642A1 (ko) | Pscch 및 pssch를 전송하는 방법 및 장치 | |
| WO2020226409A1 (ko) | 그룹캐스트 전송에 대한 사이드링크 harq 피드백 | |
| WO2020226404A1 (ko) | Nr v2x에서 위치 정보를 전송하는 방법 및 장치 | |
| WO2021075829A1 (ko) | Nr v2x에서 tdd 슬롯 설정과 관련된 정보를 시그널링하는 방법 및 장치 | |
| WO2020067843A1 (ko) | Nr v2x에서 사이드링크 자원을 선택하는 방법 및 장치 | |
| WO2022149853A1 (ko) | 무선 통신 시스템에서 상태 천이를 처리하기 위한 방법 및 장치 | |
| WO2021040437A1 (ko) | Nr v2x에서 사이드링크와 관련된 자원을 선택하는 방법 및 장치 | |
| WO2020226408A1 (ko) | 사이드링크 전송을 위한 자원에 관한 정보 | |
| WO2021206528A1 (ko) | Nr v2x에서 sci 상의 ndi 값을 결정하는 방법 및 장치 | |
| WO2020209603A1 (ko) | 사이드링크 통신을 수행하는 방법 및 장치 | |
| WO2022191640A1 (ko) | Nr v2x에서 sl drx 동작 시 후보 자원을 선택하는 방법 및 장치 | |
| WO2021261800A1 (ko) | Nr v2x에서 자원 풀을 관리하는 방법 및 장치 | |
| WO2022265397A1 (ko) | Lte sl를 고려한 nr sl 자원 선택 방법 및 장치 | |
| WO2022055191A1 (ko) | 상이한 rat을 기반으로 sl 통신 및 ul 전송을 수행하는 방법 및 장치 | |
| WO2023075548A1 (ko) | Nr v2x에서 sl harq rtt 타이머를 설정하는 방법 및 장치 | |
| WO2021040433A1 (ko) | Nr v2x에서 동기화를 수행하는 방법 및 장치 | |
| WO2021029723A1 (ko) | Nr v2x에서 s-ssb를 전송하는 방법 및 장치 | |
| WO2020190068A1 (ko) | 사이드링크 csi를 전송하는 방법 및 장치 | |
| WO2022158830A1 (ko) | 무선 통신 시스템에서 자원 할당을 위한 방법 및 장치 | |
| WO2022131882A1 (ko) | Nr v2x에서 sl drx 설정을 기반으로 sl 통신을 수행하는 방법 및 장치 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21883349 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023523100 Country of ref document: JP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2021883349 Country of ref document: EP Effective date: 20230522 |
|
| WWG | Wipo information: grant in national office |
Ref document number: 2021883349 Country of ref document: EP |