WO2025014276A1 - 단말-간 통신을 위한 빔 측정 방법 및 장치 - Google Patents
단말-간 통신을 위한 빔 측정 방법 및 장치 Download PDFInfo
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- WO2025014276A1 WO2025014276A1 PCT/KR2024/009856 KR2024009856W WO2025014276A1 WO 2025014276 A1 WO2025014276 A1 WO 2025014276A1 KR 2024009856 W KR2024009856 W KR 2024009856W WO 2025014276 A1 WO2025014276 A1 WO 2025014276A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/328—Reference signal received power [RSRP]; Reference signal received quality [RSRQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
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- 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
Definitions
- 5G NR is a new clean-slate type mobile communication system that is the successor technology to LTE (long term evolution) and has the characteristics of 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 between 1 GHz and 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.
- the 6G (wireless communication) system aims to achieve (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) low energy consumption of battery-free IoT (internet of things) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities.
- the vision of the 6G system can be divided into four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy the requirements as shown in Table 1 below.
- Table 1 can represent an example of the requirements of a 6G system.
- a method for a first device to perform wireless communication may be provided.
- the method may include: receiving a first inter-device physical channel transmission from a second device based on a first resource; and obtaining information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- a first device performing wireless communication may include: at least one transceiver; at least one processor; and at least one memory executably connected to the at least one processor and having instructions recorded thereon, which cause the first device to perform operations based on being executed by the at least one processor.
- the operations may include: receiving a first inter-device physical channel transmission from a second device based on a first resource; and acquiring information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- a non-transitory computer-readable storage medium having instructions recorded thereon may be provided.
- the instructions when executed, may cause a first device to: receive a first inter-device physical channel transmission from a second device based on a first resource; and obtain information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- a method for a second device to perform wireless communication may be provided.
- the method may include: transmitting a first inter-device physical channel transmission to a first device based on a first resource; acquiring information about a second resource for transmitting a first reference signal for beam measurement based on information about the first resource; and transmitting the first reference signal to the first device based on the second resource.
- a second device performing wireless communication may include: at least one transceiver; at least one processor; and at least one memory executably connected to the at least one processor and having instructions recorded thereon that cause the second device to perform operations based on being executed by the at least one processor.
- the operations may include: transmitting a first inter-device physical channel transmission to the first device based on a first resource; acquiring information about a second resource for transmitting a first reference signal for beam measurement based on information about the first resource; and transmitting the first reference signal to the first device based on the second resource.
- FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.
- FIG. 2 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure.
- FIG. 3 illustrates an example of a typical scenario of an NTN based on a transparent payload, according to one embodiment of the present disclosure.
- FIG. 4 illustrates an example of a typical scenario for an NTN based on a regenerative payload, according to one embodiment of the present disclosure.
- FIG. 5 illustrates an example of a sensing operation according to one embodiment of the present disclosure.
- FIG. 6 illustrates a slot structure of a frame according to one embodiment of the present disclosure.
- FIG. 7 illustrates an example of a BWP according to one embodiment of the present disclosure.
- FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode according to one embodiment of the present disclosure.
- FIG. 9 illustrates a beam measurement resource determined based on sensing according to one embodiment of the present disclosure.
- FIG. 10 illustrates a beam measurement resource determined based on a control signal according to an embodiment of the present disclosure.
- FIG. 11 illustrates a beam measurement resource transmitted in a time division multiplexing manner according to one embodiment of the present disclosure.
- FIG. 12 illustrates a beam measurement resource on which a beam sweeping operation is performed according to one embodiment of the present disclosure.
- FIG. 13 illustrates a procedure for a first device to perform wireless communication according to one embodiment of the present disclosure.
- FIG. 14 illustrates a procedure for a second device to perform wireless communication according to one embodiment of the present disclosure.
- FIG. 15 illustrates a communication system (1) according to one embodiment of the present disclosure.
- FIG. 16 illustrates a wireless device according to one embodiment of the present disclosure.
- FIG. 18 illustrates a wireless device according to one embodiment of the present disclosure.
- a or B can mean “only A”, “only B”, or “both A and B”. In other words, as used herein, “A or B” can be interpreted as “A and/or B”. For example, as used herein, “A, B or C” can mean “only A”, “only B”, “only C”, or “any combination of A, B and C”.
- a slash (/) or a comma can mean “and/or”.
- A/B can mean “A and/or B”.
- A/B can mean "only A”, “only B”, or “both A and B”.
- A, B, C can mean "A, B, or C”.
- At least one of A and B can mean “only A”, “only B” or “both A and B”. Additionally, as used herein, the expressions “at least one of A or B” or “at least one of A and/or B” can be interpreted identically to “at least one of A and B”.
- At least one of A, B and C can mean “only A”, “only B”, “only C”, or “any combination of A, B and C”. Additionally, “at least one of A, B or C” or “at least one of A, B and/or C” can mean “at least one of A, B and C”.
- higher layer parameters may be parameters that are set for the terminal, set in advance, or defined in advance.
- a base station or a network may transmit higher layer parameters to the terminal.
- the higher layer parameters may be transmitted through radio resource control (RRC) signaling or medium access control (MAC) signaling.
- RRC radio resource control
- MAC medium access control
- configured or defined may be interpreted as being configured or preset to a device through predefined signaling (e.g., SIB, MAC, RRC) from a base station or a network. In this specification, “configured or defined” may be interpreted as being preset to a device.
- predefined signaling e.g., SIB, MAC, RRC
- 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 can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000.
- TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications)/GPRS (general packet radio service)/EDGE (enhanced data rates for GSM evolution).
- GSM global system for mobile communications
- GPRS general packet radio service
- EDGE enhanced data rates for GSM evolution
- OFDMA can be implemented with wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.
- IEEE institute of electrical and electronics engineers
- Wi-Fi IEEE 802.11
- WiMAX IEEE 802.16
- WiMAX IEEE 802.16
- IEEE 802-20 IEEE 802-20
- E-UTRA evolved UTRA
- LTE long term evolution
- 5G NR 5G NR
- the technology proposed in this specification can be implemented with 6G wireless technology and can be applied to various 6G systems.
- the 6G system can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.
- eMBB enhanced mobile broadband
- URLLC ultra-reliable low latency communications
- mMTC massive machine-type communication
- AI artificial intelligence integrated communication
- tactile internet high throughput
- high network capacity high energy efficiency
- low backhaul and access network congestion and enhanced data security.
- FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.
- the embodiment of FIG. 1 can be combined with various embodiments of the present disclosure.
- New network characteristics in 6G could include:
- AI can be applied at each stage of the communication process (or at each stage of signal processing, as described below).
- High-precision localization (or location-based services) through communications is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.
- AI Artificial Intelligence: Introducing AI into communications can simplify and improve real-time data transmission. AI can use a lot of analytics to determine how complex target tasks are performed. In other words, AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communications. AI can also be a rapid communication in Brain Computer Interface (BCI). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.
- BCI Brain Computer Interface
- THz waves also known as sub-millimeter waves, generally refer to a frequency band between 0.1 THz and 10 THz with a corresponding wavelength ranging from 0.03 mm to 3 mm.
- the 100 GHz to 300 GHz band range (Sub THz band) is considered to be a major part of the THz band for cellular communications. Adding the Sub-THz band to the mmWave band will increase the capacity of 6G cellular communications.
- 300 GHz to 3 THz is in the far infrared (IR) frequency band.
- the 300 GHz to 3 THz band is a part of the optical band but is at the boundary of the optical band, just behind the RF band. Therefore, this 300 GHz to 3 THz band shows similarities with RF.
- FIG. 2 illustrates an electromagnetic spectrum according to an embodiment of the present disclosure. The embodiment of FIG. 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are indispensable). The narrow beam width generated by the highly directional antenna reduces interference. The small wavelength of THz signals allows a much larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array techniques to overcome range limitations.
- FSO backhaul network Free space optical transmission backhaul network
- UAVs or drones will be a crucial element in 6G wireless communications.
- high-speed data wireless connectivity can be provided using UAV technology.
- the base station (BS) entity can be installed on the UAV to provide cellular connectivity.
- UAVs may have certain features not found in fixed BS infrastructure such as easy deployment, robust line-of-sight links, and freedom of movement with controlled mobility.
- BS base station
- UAVs may have certain features not found in fixed BS infrastructure such as easy deployment, robust line-of-sight links, and freedom of movement with controlled mobility.
- UAVs can easily handle such situations.
- UAVs will be a new paradigm in wireless communications. This technology facilitates three basic requirements of wireless networks namely eMBB, URLLC, and mMTC.
- UAVs can also support several purposes such as enhancing network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and
- AAM is a higher concept than urban air mobility (UAM), which is an air transportation method that can be used in urban areas, and can refer to a means of transportation that includes movement between regional hubs as well as urban areas.
- UAM urban air mobility
- V2X vehicle to everything
- V2I vehicle to infrastructure
- NTN may represent a network or network segment that uses RF (radio frequency) resources mounted on a satellite (or unmanned aerial system (UAS) platform).
- FIG. 3 illustrates an example of a typical scenario of an NTN based on a transparent payload according to an embodiment of the present disclosure.
- FIG. 4 illustrates an example of a typical scenario of an NTN based on a regenerative payload according to an embodiment of the present disclosure. The embodiment of FIG. 3 or FIG. 4 may be combined with various embodiments of the present disclosure.
- a satellite (or UAS platform) may create a service link with a UE.
- the satellite (or UAS platform) may be connected to a gateway via a feeder link.
- the satellite may be connected to a data network via the gateway.
- a beam foot print may mean an area where a signal transmitted by a satellite can be received.
- a satellite (or UAS platform) can create a service link with a UE.
- a satellite (or UAS platform) associated with a UE can be associated with another satellite (or UAS platform) via an inter-satellite link (ISL).
- the other satellite (or UAS platform) can be associated with a gateway via a feeder link.
- a satellite can be associated with a data network via another satellite and a gateway based on a regenerative payload. If there is no ISL between a satellite and another satellite, a feeder link between the satellite and the gateway may be required.
- a regenerative payload may include radio frequency filtering, frequency conversion and amplification, demodulation/decoding, switching and/or routing, and coding/modulation.
- a regenerative payload may be substantially identical to onboarding all or part of a base station function onto the satellite (or UAS platform).
- Wireless sensing is a technology that uses radio frequencies to obtain information about the environment and/or the characteristics of objects in the environment by detecting the instantaneous linear velocity, angle, distance (range), etc. of an object. Since the radio frequency sensing function does not require a connection to the object through a device in the network, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can provide a wide range of new functions such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition.
- object recognition e.g., vehicles, humans, animals, UAVs
- Wireless sensing services can provide information to various industries (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.) that enable applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, health and traffic management, etc.
- wireless sensing can use non-3GPP type sensors (e.g., radar, camera) to additionally support 3GPP-based sensing.
- non-3GPP type sensors e.g., radar, camera
- the operation of a wireless sensing service i.e., a sensing operation, may depend on the transmission, reflection, and scattering processing of wireless sensing signals. Therefore, wireless sensing may provide an opportunity to enhance existing communication systems from a communication network to a wireless communication and sensing network.
- FIG. 5 illustrates an example of a sensing operation according to an embodiment of the present disclosure.
- the embodiment of FIG. 5 may be combined with various embodiments of the present disclosure.
- (a) of FIG. 5 illustrates an example of sensing using a sensing receiver and a sensing transmitter at the same location (e.g., monostatic sensing)
- (b) of FIG. 5 illustrates an example of sensing using a separated sensing receiver and a sensing transmitter (e.g., bistatic sensing).
- the layers of the Radio Interface Protocol between the terminal and the network can be divided into L1 (layer 1), L2 (layer 2), and L3 (layer 3) based on the three lower layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems.
- 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 controls radio resources between the terminal and the network.
- the RRC layer exchanges RRC messages between the terminal and the base station.
- the physical layer provides information transmission services to the upper layer using physical channels.
- the physical layer is connected to the upper layer, the MAC (Medium Access Control) layer, through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how and with what characteristics data is transmitted through the wireless interface.
- MAC Medium Access Control
- 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 the configuration, re-configuration, and release of radio bearers.
- RB refers to a logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, and SDAP (Service Data Adaptation Protocol) layer) for data transmission between the terminal and the network.
- the SDAP (Service Data Adaptation Protocol) layer is defined only in the user plane.
- the SDAP layer performs mapping between QoS flows and data radio bearers, marking QoS flow identifiers (IDs) in downlink and uplink packets, etc.
- Establishing an RB means the process of specifying the characteristics of the radio protocol layer and channel to provide a specific service, and setting each specific parameter and operation method.
- RB can be divided into two types: SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer).
- SRB is used as a channel to transmit RRC messages in the control plane
- DRB is used as a channel to transmit user data in the user plane.
- 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.
- RRC_CONNECTED 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.
- an RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state can release the connection with the base station while maintaining the connection with the core network.
- Downlink transmission channels that transmit data from a network to a terminal include the BCH (Broadcast Channel) that transmits system information, and the downlink SCH (Shared Channel) that transmits user traffic or control messages. Traffic or control messages of downlink multicast or broadcast services may be transmitted through the downlink SCH, or may be transmitted through a separate downlink MCH (Multicast Channel). Meanwhile, uplink transmission channels that transmit data from a terminal to a network include the RACH (Random Access Channel) that transmits initial control messages, and the uplink SCH (Shared Channel) that transmits user traffic or control messages.
- RACH Random Access Channel
- Logical channels that are located above the transport channel and are mapped to the transport channel include the Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Multicast Control Channel (MCCH), and Multicast Traffic Channel (MTCH).
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic Channel
- a radio frame can be used in uplink and downlink transmission.
- a radio frame has a length of 10 ms and can be defined by two 5 ms half-frames (Half-Frames, HF).
- a half-frame can include five 1 ms subframes (Subframes, SF).
- a subframe can be divided into one or more slots, and the number of slots in a subframe can be determined by the Subcarrier Spacing (SCS).
- SCS Subcarrier Spacing
- Each slot can include 12 or 14 OFDM (A) symbols depending on the CP (cyclic prefix).
- each slot can include 14 symbols.
- each slot can include 12 symbols.
- the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA (Single Carrier - FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).
- Table 2 illustrates 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 ) depending on the SCS setting ( u ) when normal CP or extended CP is used.
- FIG. 6 illustrates a slot structure of a frame according to an embodiment of the present disclosure.
- the embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.
- a slot includes multiple symbols in the time domain.
- a carrier includes a plurality of subcarriers in the frequency domain.
- An RB Resource Block
- An RB Resource Block
- a BWP Bandwidth Part
- P Physical Resource Block
- a carrier can include at most N (for example, 5) BWPs.
- Data communication can be performed through activated BWPs.
- Each element can be referred to as a Resource Element (RE) in the resource grid, and one complex symbol can be mapped.
- RE Resource Element
- FIG. 7 illustrates an example of a BWP according to an embodiment of the present disclosure.
- the embodiment of FIG. 7 can be combined with various embodiments of the present disclosure. In the embodiment of FIG. 7, it is assumed that there are three BWPs.
- a common resource block may be a carrier resource block numbered from one end of a carrier band to the other end.
- a PRB may be a numbered resource block within each BWP.
- Point A may indicate a common reference point for a resource block grid.
- the BWP can be set by a point A, an offset from the point A (N start BWP ) and a bandwidth (N size BWP ).
- the point A can be an outer reference point of the PRBs of a carrier on which subcarrier 0 of all nucleosides (e.g., all nucleosides supported by the network on that carrier) are aligned.
- the offset can be the PRB spacing between the lowest subcarrier in a given nucleometry and the point A.
- the bandwidth can be the number of PRBs in a given nucleometry.
- SLSS Sidelink Synchronization Signal
- 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.
- a terminal may detect an initial signal (signal detection) and obtain synchronization using S-PSS.
- the terminal can obtain detailed synchronization using S-PSS and S-SSS and detect a synchronization signal ID.
- PSCCH may be replaced by a control channel, a physical control channel, a control channel associated with a sidelink, a physical control channel associated with a sidelink, etc.
- PSSCH may be replaced by a shared channel, a physical shared channel, a shared channel associated with a sidelink, a physical shared channel associated with a sidelink, etc.
- FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode according to an embodiment of the present disclosure.
- the embodiment of FIG. 8 can be combined with various embodiments of the present disclosure.
- the base station can schedule SL resources to be used by the terminal for SL transmission.
- the base station can transmit information related to SL resources and/or information related to UL resources to the first terminal.
- the UL resources can include PUCCH resources and/or PUSCH resources.
- the UL resources can be resources for reporting SL HARQ feedback to the base station.
- the first terminal may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling.
- a PSCCH e.g., Sidelink Control Information (SCI) or 1st-stage SCI
- the first terminal may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
- the first terminal may receive a PSFCH related to the PSCCH/PSSCH from the second terminal.
- HARQ feedback information e.g., NACK information or ACK information
- the first terminal may transmit/report HARQ feedback information to the base station via PUCCH or PUSCH.
- the HARQ feedback information reported to the base station may be information generated by the first terminal based on the HARQ feedback information received from the second terminal.
- the HARQ feedback information reported to the base station may be information generated by the first terminal based on a rule set in advance.
- the DCI may be DCI for scheduling of SL.
- the terminal can determine SL transmission resources within SL resources set by the base station/network or preset SL resources.
- the set SL resources or preset SL resources may be a resource pool.
- the terminal can autonomously select or schedule resources for SL transmission.
- the terminal can perform SL communication by selecting resources by itself within the set resource pool.
- the terminal can select resources by itself within a selection window by performing sensing and resource (re)selection procedures.
- the sensing can be performed on a subchannel basis.
- the upper layer may request the UE to determine a subset of resources from which the upper layer will select resources for UE-to-UE physical channel (e.g., PSSCH/PSCCH) transmission.
- UE-to-UE physical channel e.g., PSSCH/PSCCH
- the upper layer provides the following parameters for the UE-to-UE physical channel (e.g., PSSCH/PSCCH) transmission.
- the number of subchannels to be used for terminal-to-terminal physical channel e.g., PSSCH/PSCCH
- terminal-to-terminal physical channel e.g., PSSCH/PSCCH
- resource reservation interval P rsvpTX in msec units.
- a higher layer requests a UE to determine a subset of resources to be selected for UE-to-UE physical channel (e.g., PSSCH/PSCCH) transmission as part of a re-evaluation or pre-emption procedure
- the higher layer provides a set of resources that can be re-evaluated (r 0 , r 1 , r 2 , ...) and a set of resources that can be pre-empted (r' 0 , r' 1 , r' 2 , ).
- ⁇ SL is the subcarrier spacing (e.g., SCS) configuration of the terminal-to-terminal (e.g., SL) partial bandwidth (e.g., BWP).
- the internal parameter T 2min is set to the corresponding value from the upper layer parameter sl-SelectionWindowList for the given prio TX value.
- terminal-to-terminal physical shared channel e.g., PSSCH
- terminal-to-terminal physical control channel e.g., PSCCH
- the internal parameter T 0 is defined as the number of slots corresponding to sl-SensingWindow msec.
- sl-TxPercentageList The internal parameter X for a given prio TX is defined as sl-TxPercentageList(prio TX ) converted from percentage to ratio.
- sl-PreemptionEnable If sl-PreemptionEnable is provided and is not equal to 'enabled', the internal parameter prio pre is set to the parameter sl-PreemptionEnable provided by the upper layer.
- the resource reservation interval is converted from msec units to logical slot units P' rsvp_TX .
- (t' SL 0 , t' SL 1 , t' SL 2 , ...) represents a set of slots belonging to the sidelink resource pool.
- the terminal may select a set of candidate resources (S A ) based on the procedure described below. For example, if resource (re)selection is triggered, the terminal may select a set of candidate resources (S A ) based on the procedure described below. For example, if re-evaluation or pre-emption is triggered, the terminal may select a set of candidate resources (S A ) based on the procedure described below.
- the terminal may assume that all sets of L subCH adjacent subchannels included in the corresponding resource pool within the time interval [n + T 1 , n + T 2 ] correspond to one candidate single-slot resource.
- T 1 The choice of T 1 is 0 T 1 It can follow the terminal implementation in the range of T ⁇ SL_proc,1, and T ⁇ SL_proc,1 can be predefined.
- T 2min is shorter than the remaining packet delay budget (in slots); T 2 is T 2min T 2 It can be terminal-implemented within the range of the remaining packet delay budget (in slot units); otherwise, T 2 can be set to the remaining packet delay budget (in slot units).
- the total number of candidate single slot resources can be M total .
- the sensing window can be defined as a slot range of [n - T 0 , n - T ⁇ SL_proc,0], where T 0 can be predefined and T ⁇ SL_proc,0 can be predefined in slot units.
- the terminal may monitor slots belonging to the sidelink resource pool within the sensing window excluding the slot in which its own transmission occurs.
- the terminal may perform the following steps based on the decoded terminal-to-terminal physical control channel (e.g., PSCCH) and the RSRP measured in the corresponding slots.
- PSCCH physical control channel
- the set S A can be initialized as the set of all candidate single-slot resources.
- the terminal may exclude from the set S A all candidate single-slot resources R x,y that satisfy the following conditions.
- condition c of step 6 For all periodicity values allowed by the upper layer parameter sl-ResourceReservePeriodList, and for a virtual SCI format 1-A received in slot t' ⁇ SL_m, indicating all subchannels of the resource pool in this slot, with the Resource Reservation Period field set to that periodicity value, condition c of step 6 is satisfied.
- the number of candidate single-slot resources R x,y remaining in the set S A is X. If M is less than total , the set S A is initialized with all candidate single-slot resources from step 4.
- the terminal may exclude from the set S A all candidate single-slot resources R x,y that satisfy the following conditions.
- the terminal receives SCI format 1-A in slot t' ⁇ SL_m, and the resource reservation period field and, if present, the priority field of the received SCI format 1-A indicate P rsvp_RX and prio RX , respectively.
- P' rsvp_RX is P rsvp_RX converted to units of logical slots
- T scal is set to the selection window size T 2 converted to units of msec.
- the number of candidate single slot resources remaining in the set S A is X. If M total is less than Th( pi , p j ), Th(pi , p j ) is increased by 3 dB for each priority value Th( pi , p j ), and the procedure continues from step 4.
- a terminal can report a set S A to the upper layer.
- the terminal may have to report a reevaluation of the resource r i to the upper layer.
- the terminal may report a preemption of the resource r' i to the upper layer.
- - r' i is set to the final threshold value after the execution of steps 1) - 7), i.e., Th(prio RX , prio TX ), which includes all necessary increments to reach XM total , satisfying the condition for exclusion in step 6, and
- -- sl-PreemptionEnable is provided and is equivalent to 'enabled' and prio TX > prio RX .
- -- sl-PreemptionEnable is provided and is not equivalent to 'enabled', and prio RX ⁇ prio pre and prio TX > prio RX .
- the first terminal may transmit an SCI to the second terminal on the PSCCH.
- the first terminal may transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal on the PSCCH and/or the PSSCH.
- the second terminal may decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal.
- the SCI transmitted on the PSCCH may be referred to as a 1 st SCI, a 1st SCI, a 1 st -stage SCI, or a 1 st -stage SCI format
- the SCI transmitted on the PSSCH may be referred to as a 2 nd SCI, a 2nd SCI, a 2 nd -stage SCI, or a 2 nd -stage SCI format.
- the first terminal can receive the PSFCH.
- the first terminal and the second terminal can determine the PSFCH resource, and the second terminal can transmit the HARQ feedback to the first terminal using the PSFCH resource.
- the first terminal may transmit SL HARQ feedback to the base station through PUCCH and/or PUSCH.
- terminal procedure for reporting HARQ-ACK in terminal-to-terminal communication (e.g., sidelink) is described.
- the terminal may be instructed by an SCI format to schedule PSSCH reception on one or more subchannels from N PSSCH subchs to transmit a PSFCH including HARQ-ACK information in response to PSSCH reception.
- the terminal provides HARQ-ACK information including ACK or NACK, or only NACK.
- the UE can be provided with the number of slots in the resource pool for PSFCH transmission occasion resources by sl-PSFCH-Period-r16. If the number is 0, PSFCH transmission from the UE in the resource pool is disabled.
- the UE may be instructed by a higher layer not to transmit a PSFCH in response to a PSSCH reception. If the UE receives a PSSCH in the resource pool and the HARQ Feedback Enabled/Disallowed Indicator field included in the associated SCI Format 2-A or SCI Format 2-B has a value of 1, the UE provides HARQ-ACK information through PSFCH transmission in the resource pool.
- the terminal transmits a PSFCH in a first slot, wherein the first slot includes a PSFCH resource and is a slot after the minimum number of slots provided by sl-MinTimeGapPSFCH-r16 of the resource pool after the last slot of PSSCH reception.
- the terminal receives a set of PRBs M PSFCH PRB,set in the resource pool for PSFCH transmission from the PRBs of the resource pool by sl-PSFCH-RB-Set-r16.
- the terminal allocates [(i+j N PSFCH PSSCH ) M PSFCH subch,slot , (i+1+j N PSFCH PSSCH ) M PSFCH subch,slot -1] PRBs from among M PRB,set PSFCH PRBs to slot i and subchannel j among PSSCH slots linked to PSFCH slots.
- M PSFCH subch,slot M PSFCH PRB,set / (N subch N PSFCH PSSCH ), 0 i ⁇ N PSFCH PSSCH , 0 j ⁇ N subch , and the allocation starts in ascending order of i and continues in ascending order of j.
- the terminal expects that M PSFCH PRB,set will be a multiple of N subch ⁇ N PSFCH PSSCH .
- N PSFCH type 1 and M PSFCH subch,slot PRB is associated with the start subchannel of the corresponding PSSCH,
- N PSFCH type N PSSCH subch and N PSSCH subch ⁇ M PSFCH subch,slot PRB is associated with one or more subchannels among the N PSSCH subch subchannels of the corresponding PSSCH.
- the terminal determines the index of the PSFCH resource for PSFCH transmission in response to the PSSCH reception as (P ID + M ID ) mod R PSFCH PRB,CS , where P ID is a physical layer source ID provided by SCI format 2-A or 2-B for scheduling PSSCH reception, and M ID is an ID of the terminal receiving the PSSCH indicated by the upper layer if the terminal detects SCI format 2-A with the Cast Type Indicator field value of "01", otherwise M ID is 0.
- the terminal determines the m 0 value for calculating the cyclic shift ⁇ value from the N PSFCH CS and the cyclic shift pair index corresponding to the PSFCH resource index using Table 3.
- Circular shift pair index 5 1 0 - - - - - 2 0 3 - - - - 3 0 2 4 - - - 6 0 1 2 3 4 5
- the terminal determines a value m cs for calculating the cyclic shift ⁇ value.
- the terminal applies one cyclic shift among the cyclic shift pairs to the sequence used for PSFCH transmission.
- transmitting a resource, performing a resource transmission may mean an action of performing a transmission based on the resource, an action of performing a transmission on the resource, or an action of performing a transmission using the resource.
- a terminal may perform transmission and/or reception based on multiple panels and/or beam directions, and in this case, it may be necessary to define a method for managing settings such as beam-related information or spatial domain transmission/reception filters (hereinafter, referred to as beam management method).
- beam management method a method for managing settings such as beam-related information or spatial domain transmission/reception filters
- terminal-to-terminal communication e.g., SL communication
- proposed methods of the present disclosure can obviously be extended to arbitrary node-to-node communication.
- first potential transmission resource information to which first transmission beam information is applied is promised/set in advance
- the first terminal selectively transmits a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first potential transmission resource
- the second terminal can perform beam measurement using the first control signal and/or the first beam measurement resource.
- the first transmission beam information may indicate beam information that is distinct from each other for the first control signal and/or the first beam measurement resource.
- the first transmission beam information may indicate transmission beam(s) for the first control signal and transmission beam(s) for the first beam measurement resource, respectively.
- information such as the transmission period and offset of the first control signal and/or the first beam measurement resource can be interpreted and applied based on the defined logical slot indexing on the pre-configured resource pool.
- a process of measuring and comparing reception sensitivity for each combination of transmission beams and reception beams may be performed in advance in order to select a pair of transmission beams and/or reception beams.
- the reception terminal In order to measure the reception sensitivity for a combination of a transmission beam and a reception beam, the reception terminal must be able to know the locations of resources to which measurement resources corresponding to a specific transmission beam and/or a transmission beam identifier are transmitted, so as to be able to measure the reception sensitivity for a specific transmission beam and/or a transmission beam identifier. For example, when the reception terminal wants to measure the reception sensitivity for each combination between a specific transmission beam and M reception beams, the reception terminal must be able to know the transmission locations of the M measurement resources to which the specific transmission beam is applied.
- the transmission locations of the beam measurement resources may need to be able to be transmitted to the reception terminal before beam pairing.
- terminal-to-terminal communication e.g., SL communication
- information that is promised/set in advance may exist, and the transmission location of the beam measurement resource may be determined based on the advance information.
- sensing-based resource selection may be supported to mitigate interference between links.
- the terminal may define a transmission resource set for resource reservation and/or allocation, and configure a sensing resource set that precedes the transmission resource set.
- the terminal may detect control signals transmitted by other terminals (e.g., terminal-to-terminal control information (e.g., SCI)) from the sensing resource set, measure reception sensitivities (e.g., RSRP (reference signals received power)) for the reserved resources and the corresponding resources, and select a transmission resource from among the remaining resources excluding resources whose related reception sensitivities are higher than a certain threshold.
- terminal-to-terminal control information e.g., SCI
- measure reception sensitivities e.g., RSRP (reference signals received power)
- the sensing-based resource selection process is a design philosophy of terminal-to-terminal communication (e.g., SL communication) that mitigates interference without centralized control, and may be preferably considered when transmitting beam measurement resources for terminal-to-terminal communication (e.g., SL communication).
- terminal-to-terminal communication e.g., SL communication
- first potential transmission resource information to which first transmission beam information is applied is promised/set in advance
- the first terminal selectively transmits a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first potential transmission resource
- the second terminal performs beam measurement using the first control signal and/or the first beam measurement resource.
- a first terminal may transmit a first control signal and/or a first beam measurement resource for beam measurement, and may set first potential transmission resources to which the first control signal and/or the first beam measurement resource may be transmitted, for each terminal-to-terminal communication (e.g., SL communication) resource pool.
- the first potential transmission resource may include a time axis transmission position (e.g., a slot index) to which the first control signal and/or the first beam measurement resource may be transmitted.
- the first potential transmission resource may include first transmission beam information, and the first transmission beam information may include identical or distinct transmission beam information for the first control signal and/or the first beam measurement resource.
- the first transmission beam information may be composed of information about transmission beam(s) applied to the first control signal and information about transmission beam(s) applied to the first beam measurement resource.
- the first control signal may be terminal-to-terminal control information (e.g., SCI) in a terminal-to-terminal physical control channel (e.g., PSCCH) and/or a control element (e.g., MAC CE) in a terminal-to-terminal physical shared channel (e.g., PSSCH), and the first beam measurement resource may be a terminal-to-terminal synchronization signal block (e.g., SL SSB) and/or a modified form of a terminal-to-terminal synchronization signal block (e.g., SL SSB) and/or a terminal-to-terminal channel state information reference signal (e.g., SL CSI-RS) and/or a modified form of a terminal-to-terminal channel state information reference signal (e.g., SL CSI-RS).
- SCI terminal-to-terminal control information
- PSCCH terminal-to-terminal physical control channel
- MAC CE e.g., MAC CE
- a first terminal may selectively transmit a first control signal and/or a first beam measurement resource on a first potential transmission resource.
- a second terminal may attempt to receive the first control signal and/or the first beam measurement resource on the first potential transmission resource, and if it determines that the first control signal and/or the first beam measurement resource has been successfully received, may perform beam measurement using the corresponding signal.
- the first beam measurement resource and/or the beam measurement resource indicated by the first control signal may be determined to be valid, and beam measurement may be performed. If the second terminal performs beam measurement using the first control signal, the resource for beam measurement may be transmitted within the first potential transmission resource or may be transmitted as a transmission resource indicated by the first control signal.
- the transmitting terminal can selectively transmit beam measurement resources in consideration of the interference situation so as not to aggravate interference induction, and the receiving terminal can opportunistically measure reception sensitivity for each combination of transmitting beams and receiving beams by detecting and measuring transmission resources for each transmitting beam with one or more receiving beams at the promised/set resource location.
- the beam measurement resource that the transmitting terminal provides to the receiving terminal, the first potential transmission resource information on which transmission is performed can be reset/updated.
- the transmitting terminal selects a sensing-based beam measurement transmission resource on the first potential transmission resource that the transmitting terminal has signaled in advance, when interference exceeding a preset threshold level is measured, or when an increase in a reference signal reception power (e.g., RSRP) threshold used for determining an idle resource exceeds a preset tolerance, or when a preset timer expires, the transmitting terminal can reset/update the first potential transmission resource information.
- RSRP reference signal reception power
- the terminals when communication is performed between a first terminal and a second terminal, the terminals may pre-promise/set first potential transmission resource information including first transmission beam information, and the first terminal may selectively transmit a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first potential transmission resource.
- the first terminal performs a sensing-based resource selection process and a first potential transmission resource is selected, transmission of the first control signal and/or the first beam measurement resource in the first potential transmission resource may be permitted.
- the set of sensing target resources may consist of first potential transmission resources.
- the transmitting terminal can select a specific resource if the reception strength for the specific resource is lower than or equal to a first reference value.
- the first reference value for selecting a data resource and the first reference value for selecting a beam measurement resource may be different.
- the sensing interval may be associated with the first potential transmission resource on which the first terminal attempts to transmit.
- FIG. 9 illustrates a beam measurement resource determined based on sensing according to an embodiment of the present disclosure.
- the embodiment of FIG. 9 can be combined with various embodiments of the present disclosure.
- the first terminal may perform a sensing-based resource selection procedure before transmitting a first control signal for beam measurement and/or a first beam measurement resource.
- terminal-to-terminal communication e.g., SL communication
- the first terminal may configure a sensing target resource set with first potential transmission resources within a certain time interval, and select resources whose reception strength is lower than a certain criterion as transmission candidate resources.
- the first terminal may increase the criterion for the reception strength and repeat the sensing process.
- the terminal when communication is performed between a first terminal and a second terminal, the terminals promise/set first potential transmission resource information including first transmission beam information in advance, and when the first terminal selectively transmits a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first potential transmission resource, the first control signal may reserve transmission of a second control signal and/or a second beam measurement resource in a second potential transmission resource different from the first potential transmission resource.
- the second control signal and/or the second beam measurement resource may be applied with second transmission beam information that is the same as or different from the first transmission beam information.
- the second transmission beam information may be transmitted to the second terminal in a different manner from the first transmission beam information.
- the first terminal may indicate the second transmission beam information in the first control signal.
- the second potential transmission resource can be selected based on the sensing results.
- the second terminal may attempt beam measurement using the second control signal and/or the second beam measurement resource in the second potential transmission resource.
- FIG. 10 illustrates a beam measurement resource determined based on a control signal according to an embodiment of the present disclosure.
- the embodiment of FIG. 10 can be combined with various embodiments of the present disclosure.
- a first control signal and/or a first beam measurement resource may be transmitted to support beam pairing in a first potential transmission resource defined periodically according to the proposed method(s) of the present disclosure.
- the first potential transmission resource may be set to a relatively long cycle, and if the cycle is followed, a delay in the beam measurement process may occur.
- transmission of the second control signal and/or the second beam measurement resource in a resource other than the first potential transmission resource, for example, the second potential transmission resource may be reserved through the first control signal.
- the first terminal when the first terminal transmits the first control signal and/or the first beam measurement resource, the first terminal may indicate repeated transmission of the first control signal and/or the first beam measurement resource within the second potential transmission resource.
- the second terminal may perform a reception beam sweeping operation for the repeated transmission.
- beam sweeping may mean an operation of sequentially changing a beam direction in a time axis and transmitting when a transmission device operates a plurality of directional beams.
- the second potential transmission resource to transmit the second control signal and/or the second beam measurement resource may be selected based on sensing.
- the terminal when communication is performed between a first terminal and a second terminal, the terminals promise/set first potential transmission resource information including first transmission beam information in advance, the first terminal selectively transmits a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first potential transmission resource, and when the second terminal performs beam measurement utilizing the first control signal and/or the first beam measurement resource in the first potential transmission resource, the second terminal can perform beam measurement only when detection of the first control signal and/or the first beam measurement resource is successful.
- successful detection of the first control signal and/or the first beam measurement resource may include a case where the reception strength of a specific signal (e.g., SL-reference signal reception power (e.g., RSRP)) is greater than a certain reference value and/or a case where demodulation of specific data (e.g., terminal-to-terminal control information (e.g., SCI)) is successful.
- a specific signal e.g., SL-reference signal reception power (e.g., RSRP)
- demodulation of specific data e.g., terminal-to-terminal control information (e.g., SCI)
- a first control signal and/or a first beam measurement resource may be transmitted to support beam pairing in a first potential transmission resource periodically defined according to the proposed method(s) of the present disclosure.
- the first terminal may opportunistically transmit the first control signal and/or the first beam measurement resource based on sensing, and the second terminal may utilize the first control signal and/or the first beam measurement resource for beam measurement.
- the second terminal when the second terminal fails to detect the first beam measurement resource, it may be necessary to distinguish whether the first terminal transmitted the first beam measurement resource but the reception signal strength is low or the first terminal did not transmit the first beam measurement resource. For example, when the second terminal successfully detects the first control signal, the second terminal may determine that the corresponding first beam measurement resource is valid and utilize the corresponding first beam measurement resource for beam measurement.
- the terminals when communication is performed between a first terminal and a second terminal, the terminals may pre-promise/set first transmission resource information including first transmission beam information, the first terminal may periodically transmit a first control signal and/or a first beam measurement resource to which the first transmission beam information is applied in the first transmission resource, reserve a second potential transmission resource different from the first transmission resource through the first control signal, and selectively transmit transmission of the second control signal and/or the second beam measurement resource in the second potential transmission resource, and the second terminal may perform beam measurement utilizing the first control signal and/or the first beam measurement resource and/or the second control signal and/or the second beam measurement resource.
- the second control signal and/or the second beam measurement resource may be applied with second transmission beam information that is the same as or different from the first transmission beam information.
- the second transmission beam information may be transmitted to the second terminal in a different manner from the first transmission beam information.
- the first terminal may indicate the second transmission beam information via the first control signal.
- the first terminal selects the second potential transmission resource through a sensing-based resource selection procedure, transmission of the second control signal and/or the second beam measurement resource in the second potential transmission resource may be permitted.
- the first control signal and/or the first beam measurement resource are transmitted within the pre-promised/established resource pool
- information such as the transmission period and offset of the first control signal and/or the first beam measurement resource can be interpreted and applied based on the defined logical slot indexing on the pre-established resource pool.
- a transmitting terminal may transmit a periodic beam measurement resource for beam measurement.
- the first terminal may periodically transmit a first control signal and/or a first beam measurement resource to which first transmission beam information is applied in a first transmission resource.
- the first transmission resource may be excluded from a resource pool for terminal-to-terminal communication (e.g., SL communication)-based data communication, and the first beam measurement resource periodically transmitted through the resource may be designed such that it does not collide with data transmission.
- the first control signal may opportunistically allocate and/or reserve additional second control signal and/or second beam measurement resource transmission to be transmitted within a second potential transmission resource, wherein the second potential transmission resource may exist within a resource pool allowing data transmission.
- the second control signal and/or the second beam measurement resource may be transmitted on a resource that is determined not to be congested after the transmitting terminal performs sensing.
- the receiving terminal when communication is performed between a first terminal and a second terminal, and a transmitting terminal transmits a first control signal and/or a first beam measurement resource for beam measurement, and transmits a second control signal and/or a second beam measurement resource, if the second control signal and/or the second beam measurement resource transmission is indicated by the first control signal and/or the first beam measurement resource or is triggered by a beam report resource corresponding to the first control signal and/or the first beam measurement resource transmission, the receiving terminal may assume that the receiving beam and/or the receiving spatial filter for the first control signal and/or the first beam measurement resource signal is applied to the receiving beam and/or the receiving spatial filter for the second control signal and/or the second beam measurement resource.
- the transmitting terminal can transmit a second beam measurement resource having a narrower beam direction than the first beam measurement resource to improve beam pairing performance with the receiving terminal.
- the transmission of the second beam measurement resource can be triggered by the transmission of the first beam measurement resource.
- a terminal when a terminal transmits a first beam measurement resource, transmission for a second beam measurement resource may be triggered, or when a beam report for the first beam measurement resource is received. For example, before a higher layer link such as PC5 is formed between terminals, it is difficult for a transmitting terminal to set the reception beam and/or spatial filter information applied to the second beam measurement resource, and a mutually agreed upon method may have to be followed.
- the receiving terminal triggers the signal for the second control signal and/or the second beam measurement resource with the reception beam and/or the reception spatial filter, i.e., the application of the reception beam and/or the reception spatial filter to the first control signal and/or the first beam measurement resource signal.
- a first beam measurement resource and a second beam measurement resource having hierarchical beam directions can be transmitted.
- the receiving terminal can first start searching for the first beam measurement resource having a relatively wide beam direction, and then proceed with a transmission request and/or measurement process for the second beam measurement resource.
- relationship information between a first beam and/or spatial filter applied to the first control signal and a second beam and/or spatial filter applied to the first beam measurement resource may be promised/set in advance and/or provided via the first control signal.
- the relationship information between the beams and/or spatial filters may include cases where the first beam and/or spatial filter is the same as the second beam and/or spatial filter and/or cases where the first beam and/or spatial filter is different from the second beam and/or spatial filter and/or cases where the first beam and/or spatial filter includes a direction of the second beam and/or spatial filter but is different.
- the number of first beam and/or spatial filters and the number of second beam and/or spatial filters can be distinguished from each other, and can be promised/set in advance.
- terminal-to-terminal communication e.g., SL communication
- terminal-to-terminal communication e.g., SL communication
- the terminal supports transmission of a first control signal and/or a first beam measurement resource for beam measurement
- relationship information between a first beam and/or spatial filter applied to the first control signal and a second beam and/or spatial filter applied to the first beam measurement resource may be agreed upon/set in advance between the terminals.
- the relationship information between the beams and/or spatial filters may include cases where the first beam and/or spatial filter is the same as the second beam and/or spatial filter and/or cases where the first beam and/or spatial filter is different from the second beam and/or spatial filter and/or cases where the first beam and/or spatial filter includes a direction of the second beam and/or spatial filter but is different, etc.
- one or more types may be defined in advance as the relationship information between the beams and/or spatial filters, and information on the type applied among the types may be mutually known.
- the first beam measurement resource is composed of a plurality of sub-resources distinguished in the time axis
- the first terminal transmits by applying different and/or independent transmission beams for each sub-resource of the first beam measurement resource
- the first control signal is transmitted by applying a single transmission beam corresponding to a beam group applied to the sub-resource(s) of the first beam measurement resource
- the second terminal can assume/apply a beam and/or a spatial filter applied for reception of the first control signal when receiving each sub-resource of the first beam measurement resource.
- the first control signal and the first beam measurement resource can be transmitted in a time division multiplexing manner within the slot, thereby experiencing different transmit beam gains.
- FIG. 11 illustrates beam measurement resources transmitted in a time division multiplexing manner according to an embodiment of the present disclosure.
- the embodiment of FIG. 11 can be combined with various embodiments of the present disclosure.
- the first beam measurement resource may be transmitted in a structure/form that prioritizes transmission beam sweeping or a structure/form that prioritizes reception beam sweeping.
- the structure/form that prioritizes transmission beam sweeping may be a structure/form in which the first beam measurement resource is divided into a plurality of sub-resources on the time axis, and a different transmission beam is applied to each sub-resource.
- the first control signal transmitted together with the first beam measurement resource may be transmitted so as to be receivable in all of the plurality of transmission beam directions in which the first beam measurement resource is transmitted.
- the first control signal may be transmitted by applying a single transmission beam corresponding to a beam group applied to the sub-resource(s) of the first beam measurement resource.
- the receiving terminal may apply the same receiving beam and/or spatial filter to make a fair comparison between each transmission beam when receiving and/or measuring each sub-resource of the first beam measurement resource.
- the beam and spatial filter applied when receiving the first control signal may be assumed/applied.
- the terminal when communication is performed between a first terminal and a second terminal, when the terminal can support transmission of a first control signal for beam measurement and/or a first beam measurement resource, the first beam measurement resource is composed of a plurality of sub-resources distinguished in the time axis, the first terminal transmits by applying the same transmission beam for each sub-resource of the first beam measurement resource, and the first control signal is transmitted by applying the same transmission beam as the beam applied to the sub-resource(s) of the first beam measurement resource, and the second terminal can assume/apply a beam and spatial filter that is independent of the beam and spatial filter applied when receiving the first control signal when receiving each sub-resource of the first beam measurement resource.
- the first control signal and the first beam measurement resource can be transmitted in a time division multiplexing manner within a slot and can experience the same transmission beam gain.
- the second terminal may utilize multiple directional second beams and spatial filters during reception for each iteration of the first beam measurement resource, and the selection process of the second beam and spatial filters may follow the terminal implementation.
- FIG. 12 illustrates a beam measurement resource on which a beam sweeping operation is performed according to an embodiment of the present disclosure.
- the embodiment of FIG. 12 can be combined with various embodiments of the present disclosure.
- the first beam measurement resource may be transmitted in a structure/form that prioritizes transmission beam sweeping or a structure/form that prioritizes reception beam sweeping.
- a structure/form that prioritizes transmission beam sweeping may be a structure/form in which the first beam measurement resource is divided into a plurality of sub-resources on the time axis and the same transmission beam is applied to each sub-resource.
- the first control signal transmitted together with the first beam measurement resource may be transmitted in the same beam as the transmission beam through which the first beam measurement resource is transmitted.
- the receiving terminal may perform a reception beam sweeping operation upon reception of the first beam measurement resource. For example, when receiving and/or measuring each sub-resource of the first beam measurement resource, the receiving terminal may apply different reception beams and/or spatial filters.
- the second terminal may assume/apply beam and spatial filters that are independent of the beam and spatial filters applied upon reception of the first control signal upon reception of each sub-resource of the first beam measurement resource.
- a beam measurement and reporting process comprising one or more of the following steps may be performed.
- Step 1) A first terminal configures a first beam measurement resource into a plurality of sub-resources distinguished on a time axis, applies different and/or independent transmission beams for each sub-support of the first beam measurement resource, applies a single transmission beam corresponding to a beam group applied to the first beam measurement resource for a first control signal, and transmits the first control signal and/or the first beam measurement resource.
- Step 2) The second terminal determines a common beam and/or a common space filter based on detection and/or reception performance for the first control signal, and can measure the reception intensity and/or reception performance for each beam of each sub-resource of the first beam measurement resource with the common beam and/or common space filter.
- Step 3 The second terminal can report the first control signal and the first beam measurement resource-based beam measurement result to the first terminal.
- Step 4) The second terminal can request transmission of the second beam measurement resource.
- Step 5 The first terminal configures the second beam measurement resource into a plurality of sub-resources distinguished on the time axis, applies the same transmission beam to each sub-resource of the second beam measurement resource, applies the same transmission beam as the transmission beam applied to the first beam measurement resource to the second control signal, and transmits the second control signal and/or the second beam measurement resource.
- the transmission beam applied to the second beam measurement resource in step 5 may be one of the transmission beams reported by the second terminal in step 3 and/or step 4.
- the second terminal can search for an optimal reception beam by performing reception beam sweeping, etc. for the second beam measurement resource.
- a transmitting terminal may configure a beam measurement resource into a plurality of sub-resources distinguished on the time axis and transmit after applying different transmission beams to each of them, and transmit a control signal after applying a single transmission beam corresponding to a beam group.
- the receiving terminal can detect a beam group based on the control signal reception performance, and apply a spatial filter for control signal reception to the beam measurement resource reception to measure the beams of the lower resources.
- the receiving terminal can request beam measurement resources for the reception beam sweeping (e.g., P3) process when reporting beams.
- the transmitting terminal that receives the request configures the beam measurement resources into multiple sub-resources distinguished on the time axis, applies the beam reported by the receiving terminal, and transmits it, and the receiving terminal can proceed with reception beam optimization by utilizing the beam measurement resources.
- the first terminal when communication is performed between a first terminal and a second terminal, when the first terminal transmits a first control signal to which first transmission beam information is applied and/or a first beam measurement resource in a first transmission resource, the first terminal may indicate whether or not the first control signal is a beam measurement-only resource through QoS information in the first control signal.
- the conventional fields used for data demodulation in the first control signal can be interpreted/utilized for other purposes.
- the conventional fields can be utilized to indicate synchronization signal information that is in a QCL relationship with the first beam measurement resource.
- a QoS value to indicate whether beam measurement is a dedicated resource can be agreed upon/set in advance between terminals.
- terminal-to-terminal communication e.g., SL communication
- QoS information of data transmitted through a control signal such as terminal-to-terminal control information (e.g., SCI) may be provided together.
- the beam measurement dedicated resource may need to be distinguished through a control signal such as terminal-to-terminal control information (e.g., SCI) since it is not data transmission.
- a control signal such as terminal-to-terminal control information (e.g., SCI) since it is not data transmission.
- a unique QoS value can be assigned in the QoS field in the terminal-to-terminal control information (e.g., SCI).
- the QoS field indicates beam measurement dedicated resources
- other fields in the control signal can be reinterpreted as dedicated fields for beam measurement resources.
- primary terminal-to-terminal control information may be transmitted in terminal-to-terminal control information (e.g., SCI) format 1-A, and may include multiple bit fields for data transmission, such as frequency-domain resource allocation, time-domain resource allocation, resource reservation period, demodulation reference signal (e.g., DM-RS) pattern, secondary terminal-to-terminal control information (e.g., SCI) format, number of demodulation reference signal (e.g., DM-RS) ports, and MCS, in addition to a bit field indicating QoS.
- demodulation reference signal e.g., DM-RS
- secondary terminal-to-terminal control information e.g., SCI format
- number of demodulation reference signal e.g., DM-RS
- the QoS information indicates that the resource is a beam measurement-only resource
- some of the fields may be utilized for QCL (quasi colocation) information and/or TCI (transmission configuration indication) purposes.
- the QCL and/or TCI information may be information indicating that the beam measurement-only resource is transmitted with the same or similar spatial filter as another reference signal.
- the reception intensity measured with a reference signal in a first transmission resource linked to the second transmission resource may be predicted and/or measured by adding a transmission beam and/or reception beam gain difference between the second transmission resource and the first transmission resource.
- the terminal when terminal-to-terminal communication (e.g., SL communication) is performed between a first terminal and a second terminal, the terminal may support a channel sensing operation to support transmission such as Mode 2.
- the terminal may recognize transmission resources reserved in the future through control signals measured within a sensing period, etc.
- the terminal can predict the reception sensitivity that the reserved transmission resource will apply to the channel through the reception sensitivity measured within the sensing interval.
- the transmission beam and/or reception beam applied between the received transmission resource and the reserved transmission resource may be different, and a difference in reception sensitivity may occur as much as the beam gain difference.
- the present disclosure proposes a method of predicting and/or measuring the reception intensity of a second transmission resource by adding a transmission beam and/or reception beam gain difference between the second transmission resource and the first transmission resource to the reception intensity measured with a reference signal in a first transmission resource linked to the second transmission resource.
- the power spectral density (PSD) and/or allocated frequency resource size between the reference signal(s) for beam measurement transmitted at different times may be maintained during transmission.
- the reference signal for beam measurement may be in the form of “non-standalone SL CSI-RS”.
- the reference signal for beam measurement may follow a transmission power control scheme that is independent and/or distinct from the transmission power control scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together.
- a transmission power control scheme that is independent and/or distinct from the transmission power control scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together.
- the reference signal for beam measurement may follow a frequency resource allocation scheme that is independent and/or distinct from the frequency resource allocation scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together.
- a frequency resource allocation scheme that is independent and/or distinct from the frequency resource allocation scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together.
- the PSDs of terminal-to-terminal physical channels e.g., PSCCH/PSSCH
- the PSDs of the reference signals for associated beam measurement can be transmitted to be the same.
- the allocated frequency resource sizes of terminal-to-terminal physical channels e.g., PSCCH/PSSCH
- the allocated frequency resource sizes of reference signals for associated beam measurement can be transmitted to be the same.
- the transmitting terminal can provide the receiving terminal with transmission interval and/or resource group information in which the PSD of the reference signal for beam measurement is maintained.
- the reference signal for beam measurement is transmitted in a time division multiplexing manner with a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) and can follow the PSD of the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- PSCCH/PSSCH terminal-to-terminal physical channel
- the different points in time may be different symbols and/or different slots.
- the PSD can be maintained/determined based on the first or preset beam measurement reference signal transmission time when the beam sweeping operation starts.
- the path attenuation-based power control method may not be applied to the reference signal for the beam measurement (terminal-to-terminal communication (e.g., SL communication) or base station-to-terminal link).
- a fixed transmission power may be applied or transmission may be performed at the maximum transmission power.
- the terminal may transmit a reference signal for beam measurement.
- the reference signal for beam measurement is in the form of "non-standalone SL CSI-RS”
- the reference signal may be transmitted together with a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- the transmitting terminal can transmit the reference signal for beam measurement at multiple time points corresponding to multiple transmission beams
- the receiving terminal can measure the reference signal reception power (e.g., RSRP) value (for each beam) for the multiple transmissions and then compare the reference signal reception power (e.g., RSRP) to select an optimal beam.
- RSRP reference signal reception power
- a method is proposed to transmit a reference signal for beam measurement (e.g., non-standalone SL CSI-RS) transmitted by a terminal together with a terminal-to-terminal physical control channel (e.g., PSCCH) and/or a terminal-to-terminal physical shared channel (e.g., PSSCH) such that the PSD size is maintained between the beam measurement reference signal(s) transmitted at different times.
- a reference signal for beam measurement e.g., non-standalone SL CSI-RS
- PSCCH terminal-to-terminal physical control channel
- PSSCH terminal-to-terminal physical shared channel
- the reference signal for beam measurement may follow a transmission power control scheme that is independent and/or distinct from the transmission power control scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together, and through this, the transmission power of the reference signal for beam measurement may be controlled so that the PSD of the plurality of transmissions is maintained.
- a transmission power control scheme that is independent and/or distinct from the transmission power control scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together, and through this, the transmission power of the reference signal for beam measurement may be controlled so that the PSD of the plurality of transmissions is maintained.
- the reference signal for beam measurement may follow a frequency resource allocation scheme that is independent and/or distinct from the frequency resource allocation scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together, and through this, frequency resources may be allocated such that the PSD of the reference signal for beam measurement between multiple transmissions is maintained.
- a frequency resource allocation scheme that is independent and/or distinct from the frequency resource allocation scheme for the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that is transmitted together, and through this, frequency resources may be allocated such that the PSD of the reference signal for beam measurement between multiple transmissions is maintained.
- transmission power control for the reference signal for beam measurement can be operated independently.
- the terminal can operate a power control loop separate from the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH/PSFCH) for the reference signal for beam measurement.
- the (beam-wise) reference signal reception power e.g., RSRP
- the (beam-wise) reference signal reception power e.g., RSRP
- the reference signal reception power e.g., RSRP
- the same PSD is guaranteed between reference signals for beam measurement transmitted for multiple transmission beams, so that a fair comparison of reference signal reception power (e.g., RSRP) can be performed.
- RSRP reference signal reception power
- the terminal when a terminal transmits a reference signal for beam measurement together with an associated terminal-to-terminal physical channel (e.g., PSCCH/PSSCH), the terminal can implicitly indicate time resources and/or frequency resources and/or code resources and/or beam resources of the reference signal for beam measurement through transmission resources of the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- an associated terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- a method for determining transmission resources of reference signals for implicit beam measurement based on terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) transmission resources may include one or more of the following processes.
- a set of physical resource blocks (e.g., PRBs) for a reference signal for beam measurement is (pre-)set, and the set of physical resource blocks (e.g., PRBs) can be divided into S*N physical resource block (e.g., PRB) groups or physical resource block (e.g., PRB)-interlaces.
- S can mean the number of sub-channels in a slot.
- N may mean the number of slots of a period in which a reference signal for beam measurement can be transmitted or a transmission section of a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) that can implicitly indicate a reference signal for beam measurement.
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- the physical resource block (e.g., PRB)-interlace means an interlace of physical resource blocks (e.g., PRB) units, and may mean a resource structure in which multiple physical resource blocks (e.g., PRBs) exist at a certain frequency interval between adjacent physical resource blocks (e.g., PRBs).
- a group of physical resource blocks (e.g., PRB) or a physical resource block (e.g., PRB)-interlace can be selected.
- a physical resource block (e.g., PRB) group or a physical resource block (e.g., PRB)-interlace can be determined based on a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) transmission slot index/order and/or a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) transmission subchannel index/order.
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- PSCCH/PSSCH terminal-to-terminal physical channel
- Frequency resources and/or code resources can be selected within a physical resource block (e.g., PRB).
- PRB physical resource block
- frequency resources and/or code resources within a physical resource block can be applied equally to all physical resource blocks (e.g., PRBs) within a physical resource block (e.g., PRB) group or a physical resource block (e.g., PRB)-interlace.
- frequency resources and/or code resources within a physical resource block can be determined based on a source ID and/or a member ID and/or a beam ID associated with a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- the indexing of the reference signal for beam measurement can be determined in the order of time division multiplexing (e.g., TDM) resource (e.g., symbol, slot) indexing, frequency division multiplexing (e.g., FDM) resource (e.g., physical resource block (e.g., PRB) group, physical resource block (e.g., PRB)-interlace) indexing, code division multiplexing (e.g., CDM) resource indexing (and/or frequency division multiplexing (e.g., FDM) resource indexing, time division multiplexing (e.g., TDM) resource indexing, code division multiplexing (e.g., CDM) resource indexing).
- TDM time division multiplexing
- FDM frequency division multiplexing
- FDM frequency division multiplexing
- CDM code division multiplexing
- time division multiplexing e.g., TDM resource indexing
- code division multiplexing e.g., CDM resource indexing
- the terminal may transmit a reference signal for beam measurement.
- the reference signal for beam measurement is in the form of "non-standalone SL CSI-RS”
- the reference signal may be transmitted together with a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- some resource information of the reference signal for the beam measurement may be implicitly indicated from resource allocation information of an associated terminal-to-terminal physical channel (e.g., PSCCH/PSSCH). For example, it may follow a method similar to a terminal-to-terminal physical feedback channel (e.g., PSFCH) resource allocation method of terminal-to-terminal communication (e.g., SL communication).
- a terminal-to-terminal physical feedback channel e.g., PSFCH
- SL communication resource allocation method of terminal-to-terminal communication
- a set of physical resource blocks (e.g., PRBs) for a reference signal for beam measurement is (pre-)configured, and the set of physical resource blocks (e.g., PRBs) can be divided into S*N physical resource block (e.g., PRB) groups or physical resource block (e.g., PRB)-interlaces.
- S may denote the number of subchannels in a slot
- N may denote a period in which a reference signal for beam measurement can be transmitted.
- a physical resource block (e.g., PRB)-interlace may mean a physical resource block (e.g., PRB) unit interlace, which may mean a resource structure in which a plurality of physical resource blocks (e.g., PRBs) exist at a certain frequency interval between adjacent physical resource blocks (e.g., PRBs).
- PRB physical resource block
- a physical resource block (e.g., PRB) group or a physical resource block (e.g., PRB)-interlace can be determined based on the slot index/order and/or subchannel index/order of a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) associated with a reference signal for beam measurement, for example.
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- frequency resources and/or code resources within a physical resource block can be determined based on a source ID and/or member ID indicated in a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) associated with a reference signal for beam measurement, for example.
- a source ID and/or member ID indicated in a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- frequency resources and/or code resources within a physical resource block can be applied equally to all physical resource blocks (e.g., PRBs) within a group of physical resource blocks (e.g., PRB) or a physical resource block (e.g., PRB)-interlace.
- a terminal when it is assumed that a terminal applies a collision avoidance operation to a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH), it can be expected that the implicitly indicated reference signal resource for beam measurement will also apply the collision avoidance operation. Through this, interference received by the reference signal for beam measurement can be alleviated, and measurement accuracy can be improved.
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- group identifier/indicator information for the reference signal for beam measurement can be provided.
- the group identifier/indicator information can be provided via (pre)configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE).
- pre configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE).
- the receiving terminal can assume that the reference signal(s) for beam measurement with the same group identifier/indicator information are transmitted with the same PSD.
- a terminal may transmit a reference signal for beam measurement to support multi-beam based terminal-to-terminal transmission (e.g., SL transmission).
- the receiving terminal may need to be able to recognize a resource group for which the reception sensitivity of the beam measurement reference signal can be compared, such as the reference signal reception power (e.g., RSRP).
- the reference signal reception power e.g., RSRP
- the transmitting terminal can provide the receiving terminal with group identifier/indicator information for the beam measurement reference signal.
- the transmitting terminal can indicate the group identifier to which the beam measurement reference signal belongs in the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) associated with the beam measurement reference signal, and the receiving terminal can assume that the beam measurement reference signal(s) having the same group identifier/indicator information are transmitted with the same PSD.
- the receiving terminal can compare the reception sensitivity of the beam measurement reference signal, such as the reference signal reception power (e.g., RSRP), with respect to the beam measurement reference signal(s) having the same group identifier/indicator.
- the reference signal reception power e.g., RSRP
- a receiving terminal can recognize a group of reference signals for beam measurement to which a beam sweeping operation is applied, and a transmitting terminal can search for an optimal beam in an intended beam sweeping section.
- a terminal when a terminal transmits a reference signal for beam measurement, information on the total number of transmissions and/or the current number of transmissions for the reference signal for beam measurement may be provided.
- the reference signal for beam measurement may be an aperiodic reference signal.
- the terminal can provide information on the total number of transmissions and/or the current number of transmissions for the beam measurement reference signal through terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE) associated with the beam measurement reference signal.
- terminal-to-terminal control information e.g., SCI
- control elements e.g., MAC CE
- the receiving terminal can feed back information about reference signals for beam measurement that it has not received to the transmitting terminal.
- the terminal may transmit a reference signal for beam measurement.
- the reference signal for beam measurement is in the form of "non-standalone SL CSI-RS”
- the reference signal may be transmitted together with a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- the transmitting terminal can transmit the reference signal for beam measurement at multiple time points corresponding to multiple transmission beams
- the receiving terminal can measure the reference signal reception power (e.g., RSRP) value (for each beam) for the multiple transmissions and then compare the reference signal reception power (e.g., RSRP) to select an optimal beam.
- RSRP reference signal reception power
- the receiving terminal may need to be able to recognize a group of reference signals for beam measurement against which the reference signal reception power (e.g., RSRP) (by beam) is compared.
- RSRP reference signal reception power
- a transmitting terminal may provide the receiving terminal with information about the total number of scheduled transmissions and the number of times the reference signal for beam measurement is currently being transmitted.
- the receiving terminal may recognize which number of beam measurement reference signals has been successfully received through the total number of scheduled transmissions of the reference signal for beam measurement and the number of times the reference signal for beam measurement is currently being transmitted.
- the receiving terminal can feed back information about the beam measurement reference signals that it missed to the transmitting terminal to help the beam measurement process of the transmitting terminal.
- the receiving terminal can transmit information about the beam measurement reference signals that it received and the beam measurement reference signals that it did not receive to the transmitting terminal in the form of a bitmap.
- the transmitting terminal can retransmit only the beam measurement reference signals that the receiving terminal missed.
- a terminal may (re)start a beam measurement timer upon receiving a reference signal for beam measurement, and perform a beam measurement result report after the beam measurement timer expires.
- the reference signal for beam measurement may be an aperiodic reference signal.
- the terminal (re)starting the beam measurement timer may mean setting the timer to a specific value.
- the timer setting value may be determined based on (pre-)configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE).
- the beam measurement timer may be decremented over time, for example, as each slot passes.
- the slot may be a physical slot and/or a logical slot.
- a terminal may transmit a reference signal for beam measurement to support multi-beam based terminal-to-terminal transmission (e.g., SL transmission).
- a reference signal for beam measurement is a non-periodic reference signal
- a reference point may need to be provided for when a receiving terminal should stop beam measurement and perform beam reporting.
- the terminal may (re)start a beam measurement timer upon receiving a reference signal for beam measurement, and perform a beam measurement result report after the beam measurement timer expires.
- (re)starting the beam measurement timer may mean setting the timer to a specific value.
- the timer setting value may be (pre-)set and/or PC5-RRC set.
- the beam measurement timer can be decremented over time.
- it can be decremented over each slot.
- the slot can be a physical slot and/or a logical slot.
- a receiving terminal can automatically report beam measurement results without a transmitting terminal separately instructing to stop beam measurement.
- a beam failure instance (e.g., BFI) may be triggered if a terminal fails to detect a reference signal for beam measurement and/or a terminal-to-terminal physical channel (e.g., PSCCH/PSSCH) associated with the reference signal for beam measurement for N beam measurement periods.
- a terminal-to-terminal physical channel e.g., PSCCH/PSSCH
- the N and/or beam measurement period can be determined based on (pre-)configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE).
- pre-configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information e.g., SCI
- control elements e.g., MAC CE
- a terminal may transmit a reference signal for beam measurement to support multi-beam based terminal-to-terminal transmission (e.g., SL transmission).
- a receiving terminal may trigger whether a beam failure instance occurs based on the reception sensitivity (e.g., SINR) of the reference signal for beam measurement.
- a rule may need to be provided to determine a beam failure instance without reception of the reference signal for beam measurement, in case the reference signal for beam measurement is non-periodic and the connection from the transmitting terminal is lost.
- the UE may determine that beam pairing with the transmitting UE is lost and trigger a beam failure instance.
- the N and/or beam measurement periods may be determined based on (pre-)configuration and/or PC5-RRC configuration and/or terminal-to-terminal control information (e.g., SCI) and/or control elements (e.g., MAC CE).
- a receiving terminal can trigger a beam failure instance on its own without relying on a reference signal for beam measurement even when the connection with a transmitting terminal is lost.
- beam failure detection e.g., BFD (beam failure detection)
- BFD beam failure detection
- spatial setting information for terminal-to-terminal transmission is again provided by cast type and/or by unicast session and/or by receiver for terminal-to-terminal transmission (e.g., SL transmission) and/or by SL channel type and/or by (transmitting and/or receiving) resource pool, by mobility-related information of terminal (e.g., speed, velocity, direction, acceleration, position, height, etc.) and/or by transmission priority value and/or by reception priority value and/or by terminal-to-terminal transmission (e.g., SL transmission) with terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) enabled/disabled and/or by terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) option and/or by QoS parameter and/or by (residual) packet delay budget (e.g., PDB) and/or by HARQ process and/or by beam process
- mobility-related information of terminal e.g., speed, velocity,
- spatial setting information for terminal-to-terminal transmission is again provided by cast type and/or by unicast session and/or by receiver for terminal-to-terminal transmission (e.g., SL transmission) and/or by SL channel type and/or by (transmitting and/or receiving) resource pool, by mobility-related information of terminal (e.g., speed, velocity, direction, acceleration, position, height, etc.) and/or by transmission priority value and/or by reception priority value and/or by terminal-to-terminal transmission (e.g., SL transmission) with terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) enabled/disabled and/or by terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) option and/or by QoS parameter and/or by (residual) packet delay budget (e.g., PDB) and/or by HARQ process and/or by beam process
- mobility-related information of terminal e.g., speed, velocity,
- spatial setting information for terminal-to-terminal transmission is again provided by cast type and/or by unicast session and/or by receiver for terminal-to-terminal transmission (e.g., SL transmission) and/or by SL channel type and/or by (transmitting and/or receiving) resource pool, by mobility-related information of terminal (e.g., speed, velocity, direction, acceleration, position, height, etc.) and/or by transmission priority value and/or by reception priority value and/or by terminal-to-terminal transmission (e.g., SL transmission) with terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) enabled/disabled and/or by terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) option and/or by QoS parameter and/or by (residual) packet delay budget (e.g., PDB) and/or by HARQ process and/or by beam process
- mobility-related information of terminal e.g., speed, velocity,
- spatial setting information for terminal-to-terminal transmission is again provided by cast type and/or by unicast session and/or by receiver for terminal-to-terminal transmission (e.g., SL transmission) and/or by SL channel type and/or by (transmitting and/or receiving) resource pool, by mobility-related information of terminal (e.g., speed, velocity, direction, acceleration, position, height, etc.) and/or by transmission priority value and/or by reception priority value and/or by terminal-to-terminal transmission (e.g., SL transmission) with terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) enabled/disabled and/or by terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) option and/or by QoS parameter and/or by (residual) packet delay budget (e.g., PDB) and/or by HARQ process and/or by beam process
- mobility-related information of terminal e.g., speed, velocity,
- the various schemes of the present disclosure can be applied differently per unicast session (group) and/or per cast type and/or per transmission priority value and/or per reception priority value and/or per terminal-to-terminal transmission (e.g., SL transmission) with enabled/disabled terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) and/or per terminal-to-terminal feedback (e.g., SL HARQ-ACK feedback) option and/or per QoS parameter and/or per (residual) packet delay budget (e.g., PDB) and/or per congestion control level and/or per (transmission and/or reception) resource pool and/or per terminal's mobility related information (e.g., speed, velocity, direction, acceleration, position, height, etc.) and/or per terminal-to-terminal transmission (e.g., SL transmission) or reception and/or per HARQ process and/or per beam process and/or per source ID and/or per destination ID and/or per TB
- a unit of (pre)configuration may be configured in the form of the above different combinations.
- parameter indication and management via a terminal-to-terminal physical control channel (e.g., PSCCH) and/or a terminal-to-terminal physical shared channel (e.g., PSSCH) may be performed in units of the form of the above different combinations.
- spatial settings and/or TCI information and/or QCL information, etc. may be interpreted as referring to each other and/or being replaced with beam-related information, beam direction, spatial domain transmission or reception filter, etc.
- the same spatial configuration information for transmission may mean that the spatial domain transmission filters of the terminal are the same for two different transmission signals.
- the same spatial configuration information for reception may mean that the two different reception signals are in a QCL 'TypeD' relationship and/or use the same spatial reception parameters.
- (pre)configuration may mean pre-configuration (based on signaling from a server or at the time of product shipment), configuration from a base station, or configuration via PC5-RRC between terminals.
- the various methods of the present disclosure can be applied differently depending on the terminal-to-terminal channel (e.g., SL channel).
- the various methods of the present disclosure can be applied differently depending on the type of information included in the terminal-to-terminal channel (e.g., SL channel).
- the processor (202) of the receiving terminal can set at least one partial bandwidth (e.g., BWP). Then, the processor (202) of the receiving terminal can control the transceiver (206) of the receiving terminal to receive a physical channel related to terminal-to-terminal communication (e.g., SL communication) and/or a reference signal related to terminal-to-terminal communication (e.g., SL communication) from the transmitting terminal on at least one partial bandwidth (e.g., BWP).
- a physical channel related to terminal-to-terminal communication e.g., SL communication
- a reference signal related to terminal-to-terminal communication e.g., SL communication
- the terminal may perform transmission and/or reception operations based on multiple panels and/or beam directions.
- a spatial setting including the beam-related information or a spatial domain transmission/reception filter, etc. needs to be defined.
- a beam reference signal for measuring beam quality, etc. needs to be transmitted/received between terminals based on the spatial setting, and a method for the terminals to identify transmission resource locations for transmitting the corresponding beam reference signals needs to be defined.
- a terminal may transmit a reference signal for beam measurement together with an associated terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- an associated terminal-to-terminal physical channel e.g., PSCCH/PSSCH.
- time resources, frequency resources, code resources, and/or beam resources of the reference signal for beam measurement may be implicitly indicated based on transmission resources of the terminal-to-terminal physical channel (e.g., PSCCH/PSSCH).
- information on resources for receiving a beam reference signal that can be utilized for beam-based transmission and reception operations in FR2 can be transmitted without separate signaling, thereby reducing signaling overhead.
- FIG. 13 illustrates a procedure for a first device to perform wireless communication according to an embodiment of the present disclosure.
- the embodiment of FIG. 13 can be combined with various embodiments of the present disclosure.
- a first device can receive a first inter-device physical channel transmission from a second device based on a first resource.
- the first device can obtain information on a second resource for receiving a first reference signal for beam measurement based on information on the first resource.
- the first device can receive the first reference signal from the second device based on the second resource.
- the first reference signal may be received based on the reception strength associated with the first device-to-device physical channel transmission being greater than or equal to a threshold value.
- information related to the total number of transmissions of the reference signal may be received together.
- the first device can initiate a measurement timer based on reception of the first reference signal; and perform a measurement reporting operation for at least one reference signal including the first reference signal based on expiration of the measurement timer.
- the operation of obtaining information about the second resource may include: obtaining information about a set of physical resource blocks of resources for beam measurement; and obtaining information about the second resource mapped to the first resource in the set of physical resource blocks based on a resource index associated with the first resource.
- indexing of the above resource index can be performed in the order of time division multiplexing indexing, frequency division multiplexing indexing, and code division multiplexing indexing.
- the physical resource block set may be composed of S * N physical resource block groups or physical resource block interlaces, where S is the number of subchannels in a slot, and N is the number of slots in a transmission section in which device-to-device physical channel transmission is performed.
- the second resource may be determined based on a beam ID associated with a first beam used to receive the first device-to-device physical channel transmission.
- the second resource may be determined based on an index associated with the first reference signal.
- the first device can receive group identifier information for the first reference signal from the second device.
- the first device may be agreed between the first device and the second device that reception of the first device-to-device physical channel transmission is performed based on the first beam, and that the first beam is used for transmission on the first resource.
- the first resource may be selected based on sensing, and the sensing may be performed on potential transmission resources promised between the first device and the second device for which the first beam is used.
- the processor (102) of the first device (100) can control the transceiver (106) to receive a first inter-device physical channel transmission from the second device (200) based on the first resource. Then, the processor (102) of the first device (100) can obtain information on a second resource for receiving a first reference signal for beam measurement based on information on the first resource.
- a first device performing wireless communication may include: at least one transceiver; at least one processor; and at least one memory executably connected to the at least one processor and having instructions recorded thereon, which cause the first device to perform operations based on being executed by the at least one processor.
- the operations may include: receiving a first inter-device physical channel transmission from a second device based on a first resource; and acquiring information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- the operations may further include: receiving the first reference signal from the second device based on the second resource.
- the first reference signal may be received based on the reception strength associated with the first device-to-device physical channel transmission being greater than or equal to a threshold value.
- information related to the total number of transmissions of the reference signal may be received together.
- the operations may further include: starting a measurement timer based on reception of the first reference signal; and performing a measurement reporting operation for at least one reference signal including the first reference signal based on expiration of the measurement timer.
- the operation of obtaining information about the second resource may include: obtaining information about a set of physical resource blocks of resources for beam measurement; and obtaining information about the second resource mapped to the first resource in the set of physical resource blocks based on a resource index associated with the first resource.
- indexing of the above resource index can be performed in the order of time division multiplexing indexing, frequency division multiplexing indexing, and code division multiplexing indexing.
- the physical resource block set may be composed of S * N physical resource block groups or physical resource block interlaces, where S is the number of subchannels in a slot, and N is the number of slots in a transmission section in which device-to-device physical channel transmission is performed.
- the second resource may be determined based on an index associated with the first reference signal.
- the first resource may be selected based on sensing, and the sensing may be performed on potential transmission resources promised between the first device and the second device for which the first beam is used.
- a device configured to control a first terminal.
- the device may include: at least one processor; and at least one memory executable to the at least one processor, and having instructions recorded thereon, which cause the first terminal to perform operations based on being executed by the at least one processor.
- the operations may include: receiving a first inter-UE physical channel transmission from a second terminal based on a first resource; and acquiring information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- a non-transitory computer-readable storage medium having instructions recorded thereon may be provided.
- the instructions when executed, may cause a first device to: receive a first inter-device physical channel transmission from a second device based on a first resource; and obtain information about a second resource for receiving a first reference signal for beam measurement based on information about the first resource.
- FIG. 14 illustrates a procedure for a second device to perform wireless communication according to an embodiment of the present disclosure.
- the embodiment of FIG. 14 can be combined with various embodiments of the present disclosure.
- the operation of obtaining information about the second resource may include: obtaining information about a set of physical resource blocks of resources for beam measurement; and obtaining information about the second resource mapped to the first resource in the set of physical resource blocks based on a resource index associated with the first resource.
- Fig. 15 illustrates a communication system (1) according to one embodiment of the present disclosure.
- the embodiment of Fig. 15 can be combined with various embodiments 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 means a device that performs communication using a wireless access technology (e.g., 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 XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI device/server (400).
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and/or an Aerial Vehicle (AV) (e.g., an Advanced Air Mobility (AAM)).
- UAV Unmanned Aerial Vehicle
- AV Aerial Vehicle
- AAM Advanced Air Mobility
- the XR device may include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) device, and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc.
- the portable device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc.
- the home appliance may include a TV, a refrigerator, a washing machine, etc.
- the IoT device may include a sensor, a smart meter, etc.
- a base station and a network may also be implemented as wireless devices, and a specific wireless device (200a) may act as a base station/network node to other wireless devices.
- the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication.
- NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and/or LTE Cat NB2, and is not limited to the above-described names.
- the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may perform communication based on LTE-M technology.
- LTE-M technology may be an example of LPWAN technology, and may be called by various names such as eMTC (enhanced Machine Type Communication).
- the LTE-M technology can be implemented by at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) LTE M, and is not limited to the above-described names.
- Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300).
- the network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc.
- the wireless devices (100a to 100f) can communicate with each other via the base station (200)/network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station/network.
- vehicles can communicate directly (e.g. V2V (Vehicle to Vehicle)/V2X (Vehicle to everything) communication).
- IoT devices e.g., sensors
- IoT devices can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).
- Wireless communication/connection can be established between wireless devices (100a to 100f)/base stations (200), and base stations (200)/base stations (200).
- the wireless communication/connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink/downlink communication (150a), sidelink communication (150b) (or, D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul).
- 5G NR wireless access technologies
- a wireless device and a base station/wireless device, and a base station and a base station can transmit/receive wireless signals to/from each other.
- the wireless communication/connection can transmit/receive signals through various physical channels.
- various configuration information setting processes for transmitting/receiving wireless signals various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), and resource allocation processes can be performed based on various proposals of the present disclosure.
- FIG. 16 illustrates a wireless device according to an embodiment of the present disclosure.
- the embodiment of FIG. 16 can be combined with various embodiments of the present disclosure.
- the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR).
- ⁇ the first wireless device (100), the second wireless device (200) ⁇ can correspond to ⁇ the wireless device (100x), the base station (200) ⁇ and/or ⁇ the wireless device (100x), the wireless device (100x) ⁇ of FIG. 15.
- a first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally 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 in this document.
- 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 via the transceiver (106).
- the processor (102) may receive a wireless signal including second information/signal via the transceiver (106), and then store information obtained from 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). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software codes including instructions for performing the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document.
- the processor (102) and the memory (104) may be part of a communication modem/circuit/chip designed to implement wireless communication technology (e.g., LTE, NR).
- the transceiver (106) may be connected 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 an RF (Radio Frequency) unit.
- a wireless device may also mean a communication modem/circuit/chip.
- the second wireless device (200) includes one or more processors (202), one or more memories (204), and may additionally include one or more transceivers (206) and/or one or more antennas (208).
- the processor (202) may be configured to control the memories (204) and/or the transceivers (206), and implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information/signals, and then transmit a wireless signal including the third information/signals via the transceivers (206). Additionally, the processor (202) may receive a wireless signal including fourth information/signals via the transceivers (206), and then store information obtained from signal processing of the fourth information/signals in the memory (204).
- the memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software codes including instructions for performing the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in the present document.
- the processor (202) and the memory (204) may be part of a communication modem/circuit/chip designed to implement wireless communication technology (e.g., LTE, NR).
- the transceiver (206) may be connected 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 also mean a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors (102, 202).
- processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- processors (102, 202) may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document.
- 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 descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document.
- One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, suggestions and/or methodologies disclosed herein and provide the signals to one or more transceivers (106, 206).
- One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein.
- signals e.g., baseband signals
- the one or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer.
- the 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
- the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc.
- the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more of the following: included in one or more processors (102, 202), or stored in one or more memories (104, 204) and driven by one or more of the processors (102, 202).
- the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions and/or commands.
- the one or more memories (104, 204) may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media and/or combinations thereof.
- the one or more memories (104, 204) may be located internally and/or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.
- One or more transceivers (106, 206) can transmit user data, control information, wireless signals/channels, etc., as described in the methods and/or flowcharts of this document, to one or more other devices.
- One or more transceivers (106, 206) can receive user data, control information, wireless signals/channels, etc., as described in the descriptions, functions, procedures, suggestions, methods and/or flowcharts of this document, from one or more other devices.
- one or more transceivers (106, 206) can be coupled to one or more processors (102, 202) and can transmit and receive wireless signals.
- one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, 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. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals/channels, and the like, as described in the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein, via one or more antennas (108, 208).
- one or more antennas may be multiple physical antennas, or multiple logical antennas (e.g., antenna ports).
- One or more transceivers (106, 206) may convert received user data, control information, wireless signals/channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals/channels, etc. using one or more processors (102, 202).
- One or more transceivers (106, 206) may convert processed user data, control information, wireless signals/channels, etc. from baseband signals to RF band signals using one or more processors (102, 202).
- one or more transceivers (106, 206) may include an (analog) oscillator and/or filter.
- FIG. 17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
- the embodiment of FIG. 17 can be combined with various embodiments 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 in the processor (102, 202) and/or the transceiver (106, 206) of FIG. 16.
- the hardware elements of FIG. 17 may be implemented in the processor (102, 202) and/or the transceiver (106, 206) of FIG. 16.
- blocks 1010 to 1060 may be implemented in the processor (102, 202) of FIG. 16.
- blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 16
- block 1060 may be implemented in the transceiver (106, 206) of FIG. 16.
- the codeword can be converted into a wireless signal through the signal processing circuit (1000) of Fig. 17.
- the codeword is an encoded bit sequence of an information block.
- the information block can include a transport block (e.g., UL-SCH transport block, DL-SCH transport block).
- the wireless signal can be transmitted through various physical channels (e.g., PUSCH, PDSCH).
- the codeword can be converted into a bit sequence scrambled by a scrambler (1010).
- the scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device, etc.
- the scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020).
- the modulation scheme may include pi/2-BPSK (pi/2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc.
- the complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030).
- the modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding).
- the output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by a precoding matrix W of N*M.
- N is the number of antenna ports
- M is the number of transmission layers.
- the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on complex modulation symbols. Additionally, the precoder (1040) can perform precoding without performing transform precoding.
- the resource mapper (1050) can map modulation symbols of each antenna port to time-frequency resources.
- the time-frequency resources can include a plurality of symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and a plurality of subcarriers in the frequency domain.
- the signal generator (1060) generates a wireless signal from the mapped modulation symbols, and the generated wireless signal can be transmitted to another device through each antenna.
- the signal generator (1060) can include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.
- IFFT Inverse Fast Fourier Transform
- CP Cyclic Prefix
- DAC Digital-to-Analog Converter
- the signal processing process for receiving signals in a wireless device can be configured in reverse order of the signal processing process (1010 to 1060) of FIG. 17.
- a wireless device e.g., 100, 200 of FIG. 16
- the received wireless signal can be converted into a baseband signal through a signal restorer.
- the signal restorer can 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 can be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scramble process.
- a signal processing circuit for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler and a decoder.
- FIG. 18 illustrates a wireless device according to an embodiment of the present disclosure.
- the wireless device may be implemented in various forms depending on the use-case/service (see FIG. 15).
- the embodiment of FIG. 18 may be combined with various embodiments of the present disclosure.
- the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 16 and may be composed of various elements, components, units/units, and/or modules.
- the wireless device (100, 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 a communication circuit (112) and a transceiver(s) (114).
- the communication circuit (112) may include one or more processors (102, 202) and/or one or more memories (104, 204) of FIG. 16.
- the transceiver(s) (114) may include one or more transceivers (106, 206) and/or one or more antennas (108, 208) of FIG. 16.
- the control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls overall operations of the wireless device.
- the control unit (120) may control electrical/mechanical operations of the wireless device based on programs/codes/commands/information stored in the memory unit (130).
- control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless/wired interface through the communication unit (110), or may store information received from an external device (e.g., another communication device) via a wireless/wired interface in the memory unit (130).
- an external device e.g., another communication device
- the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless/wired interface through the communication unit (110), or may store information received from an external device (e.g., another communication device) via a wireless/wired interface in the memory unit (130).
- the additional element (140) may be configured in various ways depending on 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.
- the wireless device may be implemented in the form of a robot (FIG. 15, 100a), a vehicle (FIG. 15, 100b-1, 100b-2), an XR device (FIG. 15, 100c), a portable device (FIG. 15, 100d), a home appliance (FIG. 15, 100e), an IoT device (FIG.
- Wireless devices may be mobile or stationary, depending on the use/service.
- various elements, components, units/parts, and/or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110).
- the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and the first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110).
- each element, component, unit/part, and/or module within the wireless device (100, 200) may further include one or more elements.
- the control unit (120) may be composed of one or more processor sets.
- control unit (120) may be composed of a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphic processing processor, a memory control processor, etc.
- memory unit (130) may be composed of a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory, and/or a combination thereof.
- FIG. 19 illustrates a portable device according to an embodiment of the present disclosure.
- the portable device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch, a smart glass), a portable computer (e.g., a laptop, etc.).
- the portable 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).
- the embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.
- the portable device (100) may include 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 correspond to blocks 110 to 130/140 of FIG. 18, respectively.
- the communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations.
- the control unit (120) can control components of the portable device (100) to perform various operations.
- the control unit (120) can include an AP (Application Processor).
- the memory unit (130) can store data/parameters/programs/codes/commands required for operating the portable device (100). In addition, the memory unit (130) can store input/output data/information, etc.
- the power supply unit (140a) supplies power to the portable device (100) and can include a wired/wireless charging circuit, a battery, etc.
- the interface unit (140b) can support connection between the portable device (100) and other external devices.
- the interface unit (140b) can include various ports (e.g., audio input/output ports, video input/output ports) for connection with external devices.
- the input/output unit (140c) can input or output image information/signals, audio information/signals, data, and/or information input from a user.
- the input/output unit (140c) can 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 (e.g., touch, text, voice, image, video) input by the user, and the obtained information/signals can be stored in the memory unit (130).
- the communication unit (110) converts the information/signals stored in the memory into wireless signals, and can directly transmit the converted wireless signals to other wireless devices or to a base station.
- the communication unit (110) can receive wireless signals from other wireless devices or base stations, and then restore the received wireless signals to the original information/signals.
- the restored information/signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input/output unit (140c).
- FIG. 20 illustrates a vehicle or an autonomous vehicle according to an embodiment of the present disclosure.
- the vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned/unmanned aerial vehicle (AV), a ship, etc.
- the embodiment of FIG. 20 may be combined with various embodiments of the present disclosure.
- a vehicle or autonomous vehicle may include 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 an autonomous driving unit (140d).
- the antenna unit (108) may be configured as a part of the communication unit (110).
- Blocks 110/130/140a to 140d correspond to blocks 110/130/140 of FIG. 18, respectively.
- the communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), servers, etc.
- the control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations.
- the control unit (120) can include an ECU (Electronic Control Unit).
- the drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground.
- the drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc.
- the power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired/wireless charging circuit, a battery, etc.
- the sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc.
- the sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward/backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a light sensor, a pedal position sensor, etc.
- IMU intial measurement unit
- the autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.
- the communication unit (110) can receive map data, traffic information data, etc. from an external server.
- the autonomous driving unit (140d) can generate an autonomous driving route and a driving plan based on the acquired data.
- the control unit (120) can control the driving unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed/direction control).
- the communication unit (110) can irregularly/periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles.
- the sensor unit (140c) can acquire vehicle status and surrounding environment information during autonomous driving.
- the autonomous driving unit (140d) can update the autonomous driving route and driving plan based on the newly acquired data/information.
- the communication unit (110) can transmit information on the vehicle location, autonomous driving route, driving plan, etc. to an external server.
- An external server can predict traffic information data in advance using AI technology, etc. based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.
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Abstract
Description
| Per device peak data rate | 1 Tbps |
| E2E latency | 1 ms |
| Maximum spectral efficiency | 100bps/Hz |
| Mobility support | Up to 1000km/hr |
| Satellite integration | Fully |
| AI | Fully |
| Autonomous vehicle | Fully |
| XR | Fully |
| Haptic Communication | Fully |
| CP 타입 | SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
| 노멀 CP | 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 | |
| 확장 CP | 60kHz (u=2) | 12 | 40 | 4 |
| NPSFCH CS | m0 | |||||
| 순환 시프트 페어 인덱스 0 | 순환 시프트 페어 인덱스 1 | 순환 시프트 페어 인덱스 2 | 순환 시프트 페어 인덱스 3 | 순환 시프트 페어 인덱스 4 | 순환 시프트 페어 인덱스 5 | |
| 1 | 0 | - | - | - | - | - |
| 2 | 0 | 3 | - | - | - | - |
| 3 | 0 | 2 | 4 | - | - | - |
| 6 | 0 | 1 | 2 | 3 | 4 | 5 |
| HARQ-ACK Value | 0 (NACK) | 1 (ACK) |
| Sequence cyclic shift | 0 | 6 |
| HARQ-ACK Value | 0 (NACK) | 1 (ACK) |
| Sequence cyclic shift | 0 | N/A |
Claims (20)
- 제 1 장치가 무선 통신을 수행하는 방법에 있어서,제 1 자원을 기반으로, 제 2 장치로부터 제 1 장치-간(inter-device) 물리 채널 전송을 수신하는 단계; 및상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 수신하기 위한 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 방법.
- 제 1 항에 있어서,상기 제 2 자원을 기반으로, 상기 제 2 장치로부터 상기 제 1 참조 신호를 수신하는 단계를 더 포함하는, 방법.
- 제 2 항에 있어서,상기 제 1 참조 신호는, 상기 제 1 장치-간 물리 채널 전송과 관련된 수신 세기가 임계 값 이상인 것을 기반으로 수신되는, 방법.
- 제 2 항에 있어서,상기 제 1 참조 신호와 함께, 참조 신호의 전체 전송 회수와 관련된 정보가 함께 수신되는, 방법.
- 제 2 항에 있어서,상기 제 1 참조 신호의 수신을 기반으로, 측정 타이머를 개시하는 단계; 및상기 측정 타이머의 만료를 기반으로 상기 제 1 참조 신호를 포함하는 적어도 하나의 참조 신호에 대한 측정 보고 동작을 수행하는 단계를 더 포함하는, 방법.
- 제 1 항에 있어서,상기 제 2 자원에 대한 정보를 획득하는 동작은:빔 측정을 위한 자원들의 물리 자원 블록 집합에 대한 정보를 획득하는 단계; 및상기 제 1 자원과 관련된 자원 인덱스를 기반으로 상기 물리 자원 블록 집합에서 상기 제 1 자원에 매핑되는 상기 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 방법.
- 제 6 항에 있어서,상기 자원 인덱스의 인덱싱은 시간 분할 다중화 인덱싱, 주파수 분할 다중화 인덱싱, 및 코드 분할 다중화 인덱싱의 순서로 수행되는, 방법.
- 제 6 항에 있어서,상기 물리 자원 블록 집합은 S * N 개의 물리 자원 블록 그룹들 또는 물리 자원 블록 인터레이스로 구성되고,상기 S는 슬롯 내 서브 채널의 개수이고, 및상기 N은 장치-간 물리 채널 전송이 수행되는 전송 구간 내 슬롯의 개수인, 방법.
- 제 1 항에 있어서,상기 제 2 자원은 상기 제 1 장치-간 물리 채널 전송의 수신에 사용된 제 1 빔과 관련된 빔 ID를 기반으로 결정되는, 방법.
- 제 1 항에 있어서,상기 제 2 자원은 상기 제 1 참조 신호와 관련된 인덱스를 기반으로 결정되는, 방법.
- 제 1 항에 있어서,상기 제 2 장치로부터 상기 제 1 참조 신호에 대한 그룹 식별자 정보를 수신하는 단계를 더 포함하는, 방법.
- 제 1 항에 있어서,상기 제 1 장치-간 물리 채널 전송의 수신은 제 1 빔을 기반으로 수행되고, 및상기 제 1 자원 상의 전송에는 상기 제 1 빔이 사용되는 것으로 상기 제 1 장치 및 상기 제 2 장치 간 약속되는, 방법.
- 제 1 항에 있어서,상기 제 1 자원은 센싱을 기반으로 선택되고, 및상기 센싱은 상기 제 1 빔이 사용되는 것으로 상기 제 1 장치 및 상기 제 2 장치 간 약속되는 잠재 전송 자원들에 대하여 수행되는, 방법.
- 무선 통신을 수행하는 제 1 장치에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 실행 가능하게 연결되고, 및 상기 적어도 하나의 프로세서에 의해 실행되는 것을 기반으로 상기 제 1 장치로 하여금 동작들을 수행하게 하는 명령들을 기록하고 있는 적어도 하나의 메모리를 포함하되, 상기 동작들은:제 1 자원을 기반으로, 제 2 장치로부터 제 1 장치-간(inter-device) 물리 채널 전송을 수신하는 단계; 및상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 수신하기 위한 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 제 1 장치.
- 제 1 단말을 제어하도록 설정된 장치에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 실행 가능하게 연결될 수 있고, 및 상기 적어도 하나의 프로세서에 의해 실행되는 것을 기반으로 상기 제 1 단말로 하여금 동작들을 수행하게 하는 명령들을 기록하고 있는 적어도 하나의 메모리를 포함하되, 상기 동작들은:제 1 자원을 기반으로, 제 2 단말로부터 제 1 단말-간(inter-UE) 물리 채널 전송을 수신하는 단계; 및상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 수신하기 위한 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 장치.
- 명령들을 기록하고 있는 비-일시적 컴퓨터 판독가능 저장 매체로서,상기 명령들은, 실행될 때, 제 1 장치로 하여금:제 1 자원을 기반으로, 제 2 장치로부터 제 1 장치-간(inter-device) 물리 채널 전송을 수신하게 하고; 및상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 수신하기 위한 제 2 자원에 대한 정보를 획득하게 하는, 비-일시적 컴퓨터 판독가능 저장 매체.
- 제 2 장치가 무선 통신을 수행하는 방법에 있어서,제 1 자원을 기반으로, 제 1 장치에게 제 1 장치-간(inter-device) 물리 채널 전송을 전송하는 단계;상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 전송하기 위한 제 2 자원에 대한 정보를 획득하는 단계; 및상기 제 2 자원을 기반으로, 상기 제 1 장치에게 상기 제 1 참조 신호를 전송하는 단계를 포함하는, 방법.
- 제 17 항에 있어서,상기 제 2 자원에 대한 정보를 획득하는 동작은:빔 측정을 위한 자원들의 물리 자원 블록 집합에 대한 정보를 획득하는 단계; 및상기 제 1 자원과 관련된 자원 인덱스를 기반으로 상기 물리 자원 블록 집합에서 상기 제 1 자원에 매핑되는 상기 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 방법.
- 무선 통신을 수행하는 제 2 장치에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 실행 가능하게 연결되고, 및 상기 적어도 하나의 프로세서에 의해 실행되는 것을 기반으로 상기 제 2 장치로 하여금 동작들을 수행하게 하는 명령들을 기록하고 있는 적어도 하나의 메모리를 포함하되, 상기 동작들은:제 1 자원을 기반으로, 제 1 장치에게 제 1 장치-간(inter-device) 물리 채널 전송을 전송하는 단계;상기 제 1 자원에 대한 정보를 기반으로, 빔(beam) 측정을 위한 제 1 참조 신호를 전송하기 위한 제 2 자원에 대한 정보를 획득하는 단계; 및상기 제 2 자원을 기반으로, 상기 제 1 장치에게 상기 제 1 참조 신호를 전송하는 단계를 포함하는, 제 2 장치.
- 제 19 항에 있어서,상기 제 2 자원에 대한 정보를 획득하는 동작은:빔 측정을 위한 자원들의 물리 자원 블록 집합에 대한 정보를 획득하는 단계; 및상기 제 1 자원과 관련된 자원 인덱스를 기반으로 상기 물리 자원 블록 집합에서 상기 제 1 자원에 매핑되는 상기 제 2 자원에 대한 정보를 획득하는 단계를 포함하는, 방법.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200343951A1 (en) * | 2018-03-15 | 2020-10-29 | Sony Corporation | Electronic device, wireless communication method and computer-readable medium |
| US20220046631A1 (en) * | 2019-05-10 | 2022-02-10 | Qualcomm Incorporated | Beam management for sidelink |
| WO2022120674A1 (en) * | 2020-12-10 | 2022-06-16 | Qualcomm Incorporated | Self-interference management measurements for single frequency full duplex (sffd) communication |
| KR20230090258A (ko) * | 2021-12-14 | 2023-06-21 | 삼성전자주식회사 | 뉴라디오 사이드링크 시스템의 주파수 범위2 추적 절차 향상 |
| KR20230098793A (ko) * | 2020-11-03 | 2023-07-04 | 엘지전자 주식회사 | 복수의 ue 통신 환경에서의 mmwave v2x 통신을 위한 방법 및 이를 위한 장치 |
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- 2024-07-10 EP EP24840086.3A patent/EP4723721A1/en active Pending
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200343951A1 (en) * | 2018-03-15 | 2020-10-29 | Sony Corporation | Electronic device, wireless communication method and computer-readable medium |
| US20220046631A1 (en) * | 2019-05-10 | 2022-02-10 | Qualcomm Incorporated | Beam management for sidelink |
| KR20230098793A (ko) * | 2020-11-03 | 2023-07-04 | 엘지전자 주식회사 | 복수의 ue 통신 환경에서의 mmwave v2x 통신을 위한 방법 및 이를 위한 장치 |
| WO2022120674A1 (en) * | 2020-12-10 | 2022-06-16 | Qualcomm Incorporated | Self-interference management measurements for single frequency full duplex (sffd) communication |
| KR20230090258A (ko) * | 2021-12-14 | 2023-06-21 | 삼성전자주식회사 | 뉴라디오 사이드링크 시스템의 주파수 범위2 추적 절차 향상 |
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