Method and apparatus for transmitting and receiving signal in wireless communication system
Patent Information
- Application Number
- PCT/KR2024/011576
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-09-27
- Filing Date
- 2024-08-06
- Publication Date
- 2025-02-13
Smart Images
Figure KR2024011576_13022025_PF_FP_ABST
Abstract
Description
Method and device for transmitting and receiving signals in a wireless communication system
[0001] This specification relates to a wireless communication system, and more particularly, to a method for transmitting or receiving an uplink / downlink signal in a wireless communication system and a device therefor.
[0002] Wireless communication systems are widely deployed to provide various types of communication services, such as voice and data. Typically, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power). Examples of multiple access systems include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA).
[0003] The technical task to be achieved is to provide a method and a device for transmitting or receiving signals more accurately and efficiently in a wireless communication system.
[0004] The technical task to be achieved is not limited to this, and other technical tasks can be inferred from the disclosed embodiments.
[0005] A method for transmitting an uplink signal by a terminal in a wireless communication system according to one aspect comprises: receiving configuration information for an uplink reference signal through upper layer signaling; and transmitting the uplink reference signal across a plurality of uplink bands based on the configuration information, wherein the configuration information includes identification information for one uplink band among the plurality of uplink bands, and the terminal can transmit the uplink reference signal by sequentially cycling through all of the plurality of uplink bands starting from the one uplink band identified through the identification information.
[0006] The terminal can transmit the uplink reference signal by sequentially cycling through all of the plurality of uplink bands based on frequency hopping being set for the uplink reference signal through the setting information.
[0007] The above configuration information may include the total number of frequency hops for the frequency hopping.
[0008] A frequency hopping pattern for all of the plurality of uplink bands can be determined based on the number of total frequency hops and the identification information.
[0009] Consecutive frequency hops may at least partially overlap in the frequency domain. The configuration information may include information about the at least partially overlapping frequency resources.
[0010] The gap between the frequency hops in the time domain can be determined based on the total number of frequency hops and the number of symbols per hop.
[0011] The gap between the above frequency hops may be a time interval for frequency re-tuning of the terminal.
[0012] The sequential cycling of the plurality of uplink bands for transmission of the above uplink reference signal can be performed in ascending frequency order.
[0013] The above uplink reference signal may be a sounding reference signal.
[0014] The above uplink reference signal may be a sensing signal to support integrated sensing and communication (ISAC).
[0015] According to another aspect, a computer-readable recording medium having recorded thereon commands for performing the above-described method may be provided.
[0016] According to another aspect, a device for wireless communication comprises a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein operations of the processor include: receiving configuration information for an uplink reference signal through higher layer signaling; and transmitting the uplink reference signal across a plurality of uplink bands based on the configuration information, wherein the configuration information includes identification information for one uplink band among the plurality of uplink bands, and the device can transmit the uplink reference signal sequentially and cyclically across the plurality of uplink bands starting from the one uplink band identified through the identification information.
[0017] The above device may be a processing device for controlling a terminal operating in a wireless communication system.
[0018] The above device may further include a transmitter and receiver.
[0019] The above device may be a terminal operating in a wireless communication system.
[0020] In another aspect, a method for a base station to receive an uplink signal in a wireless communication system includes: transmitting configuration information for an uplink reference signal through upper layer signaling; and receiving the uplink reference signal across a plurality of uplink bands based on the configuration information, wherein the configuration information includes identification information for one uplink band among the plurality of uplink bands, and the base station can receive the uplink reference signal by sequentially cycling through all of the plurality of uplink bands starting from the one uplink band identified through the identification information.
[0021] According to another aspect, a base station for wireless communication comprises a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein operations of the processor include: transmitting configuration information for an uplink reference signal via higher layer signaling; and receiving the uplink reference signal across a plurality of uplink bands based on the configuration information, wherein the configuration information includes identification information for one uplink band among the plurality of uplink bands, and the base station can receive the uplink reference signal by sequentially cycling across all of the plurality of uplink bands starting from the one uplink band identified through the identification information.
[0022] According to one embodiment, signals can be transmitted or received more accurately and efficiently in a wireless communication system.
[0023] The technical effects are not limited thereto and other technical effects can be inferred from the disclosed embodiments.
[0024] Figure 1 illustrates physical channels used in a 3GPP system, which is an example of a wireless communication system, and a general signal transmission method using the channels.
[0025] Figure 2 illustrates the structure of a radio frame.
[0026] Figure 3 illustrates a resource grid of slots.
[0027] Figure 4 illustrates an example of physical channels being mapped within a slot.
[0028] Figure 5 illustrates the PDSCH reception and ACK / NACK transmission process.
[0029] Figure 6 illustrates a PUSCH transmission process.
[0030] Figure 7 is a diagram showing an example of positioning protocol settings.
[0031] Figure 8 is a diagram showing an example of OTDOA.
[0032] Figure 9 is a diagram showing an example of Multi RTT.
[0033] Figure 10 illustrates a procedure for operation of a network node (e.g., upper node of a terminal, LMF, etc.) according to one embodiment.
[0034] Figure 11 illustrates the procedure of terminal operation for performing positioning measurement.
[0035] Figure 12 illustrates various ISAC environments.
[0036] Figures 13 and 14 are examples of 3GPP wireless communication systems supporting ISAC.
[0037] Figure 15 illustrates an example of the operation of a terminal according to one embodiment.
[0038] Figure 16 illustrates an example of base station operation according to one embodiment.
[0039] Figure 17 illustrates operations between a terminal, a base station, and an LMF according to one embodiment.
[0040] FIG. 18 illustrates a flowchart of a method for a terminal to transmit an uplink signal in a wireless communication system according to one embodiment.
[0041] FIG. 19 illustrates a flowchart of a method for a base station to receive an uplink signal in a wireless communication system according to one embodiment.
[0042] Figures 20 to 23 illustrate a communication system (1) and a wireless device applicable to the present disclosure.
[0043] The following technologies can be used in various wireless access systems, such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with radio technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented with radio technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented with radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (long term evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.
[0044] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communication compared to existing RAT (Radio Access Technology) is emerging. Furthermore, massive MTC (Machine Type Communications), which connects multiple devices and objects to provide various services anytime, anywhere, is also a key issue to be considered in next-generation communication. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. Accordingly, the introduction of next-generation RATs that consider enhanced Mobile BroadBand Communication (eMBB), massive MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is being discussed. In one embodiment of the present invention, for convenience, the corresponding technology is referred to as NR (New Radio or New RAT).
[0045] The term 'base station' used in this specification may be replaced with terms such as fixed station, Node B, gNode B (gNB), Access Point (AP), cell, or transmission and reception point (TRP). The term 'relay node' may be replaced with terms such as Relay Node (RN) or Relay Station. In addition, the term 'terminal' may be replaced with terms such as User Equipment (UE), Mobile Station (MS), Mobile Subscriber Station (MSS), or Subscriber Station (SS).
[0046] For clarity of explanation, the description will focus on 3GPP NR, but the technical idea of the present invention is not limited thereto.
[0047] The following documents may be referenced for background information, definitions of terms, abbreviations, etc. related to the present invention (Incorporated by Reference).
[0048] - 38.211: Physical channels and modulation
[0049] - 38.212: Multiplexing and channel coding
[0050] - 38.213: Physical layer procedures for control
[0051] - 38.214: Physical layer procedures for data
[0052] - 38.215: Physical layer measurements
[0053] - 38.300: NR and NG-RAN Overall Description
[0054] - 38.304: User Equipment (UE) procedures in idle mode and in RRC Inactive state
[0055] - 38.321Medium Access Control (MAC) protocol specification
[0056] - 38.331: Radio Resource Control (RRC) protocol specification
[0057] - 37.213: Introduction of channel access procedures to unlicensed spectrum for NR-based access
[0058] - 36.355: LTE Positioning Protocol
[0059] - 37.355: LTE Positioning Protocol
[0060] 용어 및 약어
[0061] - 5GC: 5G Core Network
[0062] - 5GS: 5G System
[0063] - AoA: Angle of Arrival
[0064] - AP: Access Point
[0065] - CID: Cell ID
[0066] - E-CID: Enhanced Cell ID
[0067] - GNSS: Global Navigation Satellite System
[0068] - GPS: Global Positioning System
[0069] - LCS: LoCation Service
[0070] - LMF: Location Management Function
[0071] - LPP: LTE Positioning Protocol
[0072] - MO-LR: Mobile Originated Location Request
[0073] - MT-LR: Mobile Terminated Location Request
[0074] - NRPPa: NR Positioning Protocol A
[0075] - OTDOA: Observed Time Difference Of Arrival
[0076] - PDU: Protocol Data Unit
[0077] - PRS: Positioning Reference Signal
[0078] - RRM: Radio Resource Management
[0079] - RSSI: Received Signal Strength Indicator
[0080] - RSTD: Reference Signal Time Difference
[0081] - ToA: Time of Arrival
[0082] - TP: Transmission Point
[0083] - TRP: Transmission and Reception Point
[0084] - UE: User Equipment
[0085] - SS: Search Space
[0086] - CSS: Common Search Space
[0087] - USS: UE-specific Search Space
[0088] - PDCCH: Physical Downlink Control Channel
[0089] - PDSCH: Physical Downlink Shared Channel;
[0090] - PUCCH: Physical Uplink Control Channel;
[0091] - PUSCH: Physical Uplink Shared Channel;
[0092] - DCI: Downlink Control Information
[0093] - UCI: Uplink Control Information
[0094] - SI: System Information
[0095] - SIB: System Information Block
[0096] - MIB: Master Information Block
[0097] - RRC: Radio Resource Control
[0098] - DRX: Discontinuous Reception
[0099] - RNTI: Radio Network Temporary Identifier
[0100] - CSI: Channel state information
[0101] - PCell: Primary Cell
[0102] - SCell: Secondary Cell
[0103] - PSCell: Primary SCG(Secondary Cell Group) Cell
[0104] - CA: Carrier Aggregation
[0105] - WUS: Wake up Signal
[0106] - TX: Transmitter
[0107] - RX: Receiver
[0108] - RSTD: Reference Signal Time Difference
[0109] - RS: Reference Signal
[0110] - PRS: Positioning Reference Signal
[0111] - SRS: Sounding Reference Signal
[0112] In a wireless communication system, a terminal receives information from a base station via the downlink (DL) and transmits it to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.
[0113] Figure 1 is a drawing for explaining physical channels used in a 3GPP NR system and a general signal transmission method using them.
[0114] When a terminal is powered on again from a powered-off state or enters a new cell, it performs an initial cell search operation, such as synchronizing with the base station, in step S101. To this end, the terminal receives a Synchronization Signal Block (SSB) from the base station. The SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The terminal synchronizes with the base station based on the PSS / SSS and obtains information such as a cell ID (cell identity). In addition, the terminal can obtain broadcast information within the cell based on the PBCH. Meanwhile, the terminal can check the downlink channel status by receiving a Downlink Reference Signal (DL RS) during the initial cell search phase.
[0115] After completing the initial cell search, the terminal can obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on the physical downlink control channel information in step S102.
[0116] Thereafter, the terminal may perform a random access procedure such as steps S103 to S106 to complete connection to the base station. To this end, the terminal may transmit a preamble through a physical random access channel (PRACH) (S103) and receive a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of contention-based random access, a contention resolution procedure such as transmission of an additional physical random access channel (S105) and reception of a physical downlink control channel and a corresponding physical downlink shared channel (S106) may be performed.
[0117] The terminal that has performed the procedure as described above can then perform the general uplink / downlink signal transmission procedure, such as receiving a physical downlink control channel / physical downlink shared channel (S107) and transmitting a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108). The control information that the terminal transmits to the base station is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and request Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and traffic data must be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via PUSCH upon request / instruction from the network.
[0118] Figure 2 illustrates the structure of a radio frame. In NR, uplink and downlink transmissions are organized into frames. Each radio frame is 10 ms long and is divided into two 5 ms half-frames (HF). Each half-frame is divided into five 1 ms sub-frames (SF). A sub-frame is divided into one or more slots, and the number of slots within a sub-frame depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM (Orthogonal Frequency Division Multiplexing) symbols, depending on the cyclic prefix (CP). When a normal CP is used, each slot contains 14 OFDM symbols. When an extended CP is used, each slot contains 12 OFDM symbols.
[0119] In an NR system, OFDM numerology (e.g., SCS) may be set differently between multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM symbol).
[0120] Figure 3 illustrates a resource grid of a slot. A slot includes multiple symbols in the time domain. For example, in the case of a regular CP, one slot includes 14 symbols, but in the case of an extended CP, one slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A Resource Block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) is defined as multiple consecutive Physical RBs (PRBs) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal. Each element in the resource grid is referred to as a Resource Element (RE), to which one complex symbol can be mapped.
[0121] Figure 4 illustrates an example of mapping physical channels within a slot. In an NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL control channel can all be included within a single slot. For example, the first N symbols within a slot can be used to transmit a DL control channel (e.g., PDCCH) (hereinafter, DL control region), and the last M symbols within a slot can be used to transmit a UL control channel (e.g., PUCCH) (hereinafter, UL control region). N and M are each integers greater than or equal to 0. The resource region (hereinafter, data region) between the DL control region and the UL control region can be used to transmit DL data (e.g., PDSCH) or UL data (e.g., PUSCH). GP provides a time gap when a base station and a terminal switch from a transmission mode to a reception mode or from a reception mode to a transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as GP.
[0122] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the downlink shared channel (DL-SCH), resource allocation information for the uplink shared channel (UL-SCH), paging information for the paging channel (PCH), system information on the DL-SCH, resource allocation information for upper layer control messages such as random access responses transmitted on the PDSCH, transmission power control commands, activation / deactivation of Configured Scheduling (CS), etc. The DCI includes a cyclic redundancy check (CRC), which is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or usage of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a terminal identifier (e.g., Cell-RNTI, C-RNTI). If the PDCCH is for paging, the CRC is masked with the Paging-RNTI (P-RNTI). If the PDCCH is for system information (e.g., a System Information Block, SIB), the CRC is masked with the System Information RNTI (SI-RNTI). If the PDCCH is for a random access response, the CRC is masked with the Random Access-RNTI (RA-RNTI).
[0123] Fig. 5 illustrates a PDSCH reception and ACK / NACK transmission process. Referring to Fig. 5, a UE can detect a PDCCH in slot #n. Here, the PDCCH includes downlink scheduling information (e.g., DCI format 1_0, 1_1), and indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1). The UE receives a PDSCH from slot #(n+K0) according to the scheduling information of slot #n, and then, when reception of the PDSCH is completed in slot #n1 (where, n+K0≤n1), the UE can transmit a UCI through a PUCCH in slot #(n1+K1). Here, the UCI can include a HARQ-ACK response to the PDSCH. If the PDSCH is configured to transmit up to 1 TB, the HARQ-ACK response can be configured with 1 bit. When a PDSCH is configured to transmit up to 2 TB, the HARQ-ACK response may consist of 2 bits if spatial bundling is not configured, and may consist of 1 bit if spatial bundling is configured. When the HARQ-ACK transmission timing for multiple PDSCHs is designated as slot #(n+K1), the UCI transmitted in slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.
[0124] Figure 6 illustrates a PUSCH transmission process. Referring to Figure 6, a terminal can detect a PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (e.g., DCI formats 0_0, 0_1). The terminal can transmit a PUSCH in slot #(n+K2) according to the scheduling information in slot #n. Here, the PUSCH includes an UL-SCH TB.
[0125] RedCap (Reduced Capability) terminal
[0126] In addition to the main 5G use cases (mMTC, eMBB, and URLLC), the importance / interest in use cases spanning mMTC and eMBB, or mMTC and URLLC, is increasing, and accordingly, the need for terminals that can efficiently support these use cases in terms of device cost, power consumption, form factor, etc. is increasing. Terminals for this purpose can be defined as (NR) RedCap (reduced capability) UEs / devices. In addition, general NR terminals that support all or one or more of the 5G main use cases, distinct from RedCap devices, can be defined as NR (normal) UEs / devices or non-RedCap UEs / devices. Redcap UE may be a terminal that has intentionally reduced some of the capabilities of the 5G key capabilities (peak data rate, user experience data rate, latency, mobility, connection density, energy efficiency, spectrum efficiency, and local traffic efficiency) defined in IMT-2020 to achieve all or part of low device cost / complexity, low power consumption, and small form factor.
[0127] The target use cases of Redcap devices, namely mMTC and eMBB, or mMTC and URLLC, spanning 5G use cases are conveniently referred to as "redcap use cases." Examples of Redcap use cases include:
[0128] (1) Connected industries
[0129] 1) Sensors and actuators can be connected to 5G networks and cores.
[0130] - Includes large-scale IWSN (Industrial Wireless Sensor Network) use cases and requirements.
[0131] - Relatively low-cost services that require small device form factors with battery lifespans of several years, as well as URLLC services with very high requirements.
[0132] - The requirements for the service are higher than those for LPWA (Low Power Wide Area, i.e. LTE-M / NB-IOT), but lower than those for URLCC and eMBB.
[0133] - Devices in this environment include: pressure sensors, humidity sensors, thermometers, motion sensors, accelerometers, actuators, etc.
[0134] 2) Smart City
[0135] The smart city vertical involves collecting and processing data to more efficiently monitor and control urban resources and provide services to city residents. In particular, surveillance camera deployment is essential not only in smart cities but also in factories and industrial sites.
[0136] 3) Wearable
[0137] Wearable use cases may include smartwatches, rings, eHealth-related devices, and medical monitoring devices. One characteristic of these use cases is the small size of the devices.
[0138] SRS (sounding reference signal)
[0139] SRS is a UL reference signal transmitted by the terminal and received by the base station. Based on SRS, the base station can perform link adaptation, DL channel estimation using channel reciprocity characteristics, UL beam management, UL precoding, and / or UL measurement acquisition.
[0140] The terminal can receive SRS configuration information (e.g., TS38.331 SRS-Config IE) provided by the base station and determine parameters for SRS transmission based on the information. The SRS configuration is composed of a list of SRS-Resources, SRS-PosResources, SRS-ResourceSets, and SRS-PosResourcesets, where SRS-ResourceSets and SRS-PosResourcesets each contain a set of SRS-Resources and SRS-PosResources.
[0141] SRS can be divided into three resource types depending on the time resource setting and transmission method.
[0142] In the case of SRS with the resource type set to periodic, the terminal determines the location where the SRS resource is transmitted based on the configured period and offset of the SRS resource set by RRC, and if configured, periodically transmits the SRS without separate signaling.
[0143] For SRS with the resource type set to semi-persistent, the terminal determines the transmission location of the SRS resource based on the configured cycle and offset of the SRS resource set by RRC, and initiates periodic transmission of the indicated SRS if SRS transmission is activated by MAC CE. If deactivated by MAC CE, the terminal stops transmitting the SRS.
[0144] For SRSs where the resource type is set to aperiodic, the terminal transmits the indicated SRS by reflecting the position of the offset set by RRC based on the time of reception of the DCI indicating triggering for the corresponding SRS resource set.
[0145] Positioning
[0146] Positioning can refer to determining the geographic location and / or velocity of a user equipment (UE) by measuring wireless signals. Location information can be requested by a client (e.g., an application) associated with the UE and reported to the client. Furthermore, the location information may be contained within a core network or requested by a client connected to the core network. The location information may be reported in a standard format, such as cell-based or geographic coordinates, and may also include an estimated error value for the UE's location and velocity and / or the positioning method used for positioning.
[0147] Figure 7 is a diagram showing an example of a positioning protocol configuration for measuring the position of a terminal.
[0148] Referring to FIG. 7, LPP can be used as a point-to-point between a location server (E-SMLC and / or SLP and / or LMF) and a target device to position the target device (UE and / or SET) using position-related measurements obtained from one or more reference sources. Through LPP, the target device and the location server can exchange measurement and / or location information based on signal A and / or signal B.
[0149] NRPPa can be used to exchange information between a reference source (ACCESS NODE and / or BS and / or TP and / or NG-RAN node) and a location server.
[0150] The functions provided by the NRPPa protocol may include:
[0151] - E-CID Location Information Transfer. This function allows location information to be exchanged between the reference source and the LMF for E-CID positioning purposes.
[0152] - OTDOA Information Transfer. This function allows information to be exchanged between the reference source and the LMF for OTDOA positioning purposes.
[0153] - Reporting of General Error Situations. This feature allows reporting of general error situations for which no function-specific error message is defined.
[0154] The positioning methods supported by NG-RAN may include GNSS (Global Navigation Satellite System), OTDOA, E-CID (enhanced cell ID), barometric positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and UTDOA (Uplink Time Difference of Arrival). Among the above positioning methods, the position of the UE may be measured using any one of the positioning methods, but the position of the UE may also be measured using two or more positioning methods.
[0155] OTDOA (Observed Time Difference Of Arrival)
[0156] Figure 8 is a diagram showing an example of an OTDOA (observed time difference of arrival) positioning method.
[0157] The OTDOA positioning method utilizes the timing measurements of downlink signals received by the UE from multiple TPs, including the eNB, ng-eNB, and PRS-dedicated TPs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. Based on these measurement results and the geographic coordinates of neighboring TPs, the UE's location can be determined.
[0158] A UE connected to a gNB can request a measurement gap for OTDOA measurements from a TP. If the UE does not recognize the SFN for at least one TP in the OTDOA assistance data, the UE can use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap to perform Reference Signal Time Difference (RSTD) measurements.
[0159] Here, the RSTD can be defined based on the smallest relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, respectively. That is, it can be calculated based on the relative time difference between the start time of the subframe of the reference cell that is closest to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell can be selected by the UE.
[0160] Accurate OTDOA measurement requires measuring the time of arrival (TOA) of signals received from three or more geographically dispersed TPs or base stations. For example, the TOA for TP 1, TP 2, and TP 3 can be measured, and based on the three TOAs, the RSTD for TP 1-TP 2, the RSTD for TP 2-TP 3, and the RSTD for TP 3-TP 1 can be calculated. Based on these TOAs, a geometric hyperbola can be determined, and the point where these hyperbolas intersect can be used to estimate the UE's location. Since each TOA measurement may have inaccuracies and / or uncertainties, the estimated UE's location can be known within a certain range depending on the measurement uncertainty.
[0161] E-CID (Enhanced Cell ID)
[0162] In the Cell ID (CID) positioning method, the location of the UE can be measured through geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.
[0163] Meanwhile, the E-CID positioning method may utilize additional UE measurements and / or NG-RAN radio resources in addition to the CID positioning method to improve the UE position estimate. In the E-CID positioning method, some of the same measurement methods as the measurement control system of the RRC protocol may be used, but generally, additional measurements are not performed solely for UE position measurement. In other words, a separate measurement configuration or measurement control message may not be provided to measure the UE's position, and the UE may not expect to be requested to perform additional measurement operations solely for position measurement, and may report measurement values obtained through measurement methods that the UE can generally measure.
[0164] For example, a serving gNB can implement an E-CID positioning method using E-UTRA measurements provided from the UE.
[0165] Examples of measurement elements that can be used for E-CID positioning include:
[0166] - UE measurements: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time difference, GERAN / WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec / Io
[0167] - E-UTRAN measurements: ng-eNB Rx-Tx Time difference, Timing Advance (T ADV ), Angle of Arrival (AoA)
[0168] Here, T ADV It can be divided into Type 1 and Type 2 as follows.
[0169] T ADV Type 1 = (ng-eNB receive-transmit time difference) + (UE E-UTRA receive-transmit time difference)
[0170] T ADV Type 2 = ng-eNB receive-transmit time difference
[0171] Meanwhile, AoA can be used to measure the direction of a UE. AoA can be defined as an estimated angle relative to the UE's position in a counterclockwise direction from a base station / TP. In this case, the geographical reference direction may be north. The base station / TP can use uplink signals such as a Sounding Reference Signal (SRS) and / or a Demodulation Reference Signal (DMRS) for AoA measurement. In addition, the larger the antenna array array, the higher the AoA measurement accuracy. When antenna arrays are arranged at equal intervals, signals received from adjacent antenna elements can have a constant phase shift (phase-rotate).
[0172] UTDOA (Uplink Time Difference of Arrival)
[0173] UTDOA is a method for determining the location of a UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location can be estimated through the arrival time difference with other cells (or base stations / TPs). To implement UTDOA, the E-SMLC can indicate the target UE's serving cell to instruct the target UE to transmit SRS. In addition, the E-SMLC can provide configuration settings such as whether the SRS is periodic or aperiodic, bandwidth, and frequency / group / sequence hopping.
[0174] Multi RTT (round trip time)
[0175] Figure 9 is a diagram showing an example of a Multi RTT (round trip time) positioning method.
[0176] Referring to Fig. 9 (a), an RTT process is illustrated in which a TOA measurement is performed by an initiating device and a responding device, and the responding device provides the TOA measurement to the initiating device for RTT measurement (calculation). For example, the initiating device may be a TRP and / or a terminal, and the responding device may be a terminal and / or a TRP.
[0177] The initiating device transmits an RTT measurement request, and the responding device can receive it (1301).
[0178] The initiating device can transmit the RTT measurement signal at t0, and the responding device can obtain the TOA measurement t1 (1303).
[0179] The responding device can transmit the RTT measurement signal at t2, and the initiating device can obtain the TOA measurement t3 (1305).
[0180] The responding device can transmit information about [t2-t1], and the initiating device can receive the information and calculate the RTT (1307). The information can be transmitted and received based on a separate signal, or can be transmitted and received as part of the RTT measurement signal (1305).
[0181] Referring to Fig. 9 (b), the RTT can correspond to a double-range measurement between two devices. Positioning estimation can be performed from the information. Based on the measured RTT, d1, d2, and d3 can be determined, and the target device location can be determined as the intersection of a circle centered at each of BS1, BS2, and BS3 (or TRP) and having each of d1, d2, and d3 as a radius.
[0182] NG-RAN positioning architecture and procedures
[0183] Figure 10 illustrates the positioning structure of a next generation (NG) radio access network (RAN). The NR RAN may be referred to as an NR RAN or a 5G RAN.
[0184] The AMF may receive a request for some location services related to a particular target UE from another entity (e.g., a GMLC or a UE), or the AMF itself may decide to initiate some location services on behalf of a particular target UE (e.g., in case of an IMS emergency call). The AMF may then send a location service request to the LMF. The LMF may process the location service request, which may include sending assistance data to the target UE for UE-based and / or UE-assisted positioning and / or positioning the target UE. The LMF sends the location service result (e.g., a position estimate for the UE) to the AMF. If the location service is requested by an entity other than the AMF (e.g., a GMLC or a UE), the AMF sends the location service result to that entity.
[0185] NG-RAN nodes can control TRPs / TPs such as RRM or DL-PRS only TPs to support PRS-based TBS.
[0186] LMF can be connected to E-SMLCt to access UTRAN information.
[0187] LMF can be connected to SLP, which is responsible for positioning with respect to the user plane.
[0188] Figure 11 illustrates an example of location services supported by NG-RAN.
[0189] When the AMF receives a Location Service Request while the UE is in CM-IDLE state, the AMF performs a network triggered service request to establish signaling for connection with the UE and allocation of a specific serving gNB / ng-eNB. In Figure 11, it is assumed that the UE is in connected mode.
[0190] A location service request for the UE may be triggered, and the location service request for the UE may be any one of 1101, 1102 or 1103. For example, an entity of 5GC (e.g. GMLC) may request some location service (e.g. positioning) for the target UE to the serving AMF (1101), or the serving AMF may itself trigger some location service (e.g. to locate the UE for an emergency call) for the target UE (1102), or the UE may request some location service (e.g. positioning or assistance data forwarding) to the serving AMF at the NAS level (1103).
[0191] AMF forwards the location service request to LMF (1104).
[0192] LMF provides services in NG-RAN to obtain location measurement or assistance data and initiates a positioning procedure with a nearby ng-eNB / gNB (1105).
[0193] (Instead of or in addition to step 1105) the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurement or to transmit position assistance data to the UE (1106).
[0194] The LMF provides a location service response to the AMF (1107) (e.g., success or failure indication and a position estimate for the UE if requested and obtained).
[0195] (For 1101) AMF provides a location service response to the 5GC entity (1108) (e.g., location estimation for the UE).
[0196] (For 1102), AMF uses the location service response received in step 1107 to support the service triggered in step 1102 (1109) (e.g., providing location estimates related to emergency calls to GMLC).
[0197] (For 1103) AMF provides a location service response to the UE (1110) (e.g., location estimation for the UE).
[0198] SRS (sounding reference signal) for positioning
[0199] In a Rel. 15 NR system, periodic, aperiodic, and semi-persistent Rel. 15 SRS can be transmitted for base station UL RTOA (UL-Relative Time of Arrival), UL SRS-RSRP, and UL-AOA (UL-Angle of Arrival) measurements, thereby supporting UL TDOA and UL AOA.
[0200] In Rel. 16 / 17 NR systems, periodic, aperiodic, and semi-persistent SRS for positioning can be transmitted for UL RTOA, UL SRS-RSRP, UL-AOA, and gNB Rx-Tx time difference measurements of the base station, thereby supporting UL TDOA, UL AOA, and multi-RTT.
[0201] SRS has different RRC parameters set depending on its purpose of use. For example, in the case of SRS for positioning, the settings are indicated through SRS-PosResources and SRS-PosResourceSet, and in the case of SRS used for other purposes (e.g., Rel. 15 SRS), the settings are indicated through SRS-Resources and SRS-ResourceSet.
[0202] To avoid confusion between SRS for positioning and SRS used for other purposes, hereinafter, SRS for positioning is referred to as SRS-p, and SRS used for other purposes (e.g., beam management, etc.) is referred to as SRS-m. In the newly proposed methods in this specification below, unless otherwise stated, SRS can be interpreted to mean SRS-p.
[0203] The method of mapping SRS resources in the time / frequency domain on a resource grid (e.g., Fig. 3) is defined in a standard document. In the case of SRS-m, repetition can be set within a slot, and intra-slot frequency hopping is supported using this. However, in the case of SRS-p, intra-slot repetition cannot be set based on the current NR standard (Rel-17), and intra-slot frequency hopping is also not supported. In the case of Periodic / semi-persistent SRS-m, inter-slot frequency hopping is supported in a periodic form.
[0204] An SRS-p setting is provided based on the serving cell (or camp on cell) of the terminal, and the SRS-p transmitted by the terminal based on the SRS-p setting can be received by one or more cells (or TRPs) including the serving cell.
[0205] For example, SRS-p can be configured by the RRC parameters SRS-PosResourceSet and SRS-PosResource defined in the TS 38.331 standard. Specifically, when the upper layer parameter SRS-PosResource is configured for SRS (i.e., SRS-p) and the upper layer parameter SpatialRelationInfoPos is configured, an ID of a configuration field of a reference reference signal is provided. The reference RS can be an SRS configured by the upper layer parameter SRS-Resource or SRS-PosResource, a CSI-RS, an SS / PBCH block, a DL PRS of a serving cell, or a DL PRS configured in an SS / PBCH block.
[0206] A UE is not expected to transmit multiple SRS resources with different spatial relationships in the same OFDM symbol.
[0207] If the upper layer parameter SpatialRelationInfoPos is not set, the terminal may use a fixed spatial domain transmission filter for transmission of SRS-p set by the upper layer parameter SRS-PosResource across multiple SRS resources, or may use another spatial domain transmission filter.
[0208] In RRC_CONNECTED mode, the terminal transmits SRS-p set by the upper layer parameter SRS-PosResource within the active UL BWP.
[0209] Only one RS source is provided for the upper layer parameter SpatialRelationInfoPos per SRS-p resource.
[0210] For operation on the same carrier, if SRS-p collides with a scheduled PUSCH, SRS-p is dropped in the symbol where the collision occurred.
[0211] The terminal does not expect SRS-PosResource to be set on a carrier of a serving cell having a slot format consisting of DL / UL symbols that are not set for PUSCH / PUCCH transmission.
[0212] Depending on the UE capability, SRS-p resources related to the initial UL BWP can be configured, and the SRS-p resources are transmitted within the initial UL BWP during RRC_INACTIVE mode with the same CP and subcarrier spacing as those configured for the initial UL BWP. Depending on the UE capability, SRS-p resources for positioning outside the initial BWP in RRC_INACTIVE mode can be configured, and the frequency location and bandwidth, subcarrier spacing, and CP length for SRS-p transmission can be configured. SRS-p resources configured outside the initial BWP in RRC_INACTIVE mode are configured in the same band and CC as the initial UL BWP.
[0213] ISAC (Integrated Sensing And Communication)
[0214] Recently, various methods for utilizing wireless sensing in wireless communication systems are being discussed. While utilizing existing radar technology for wireless sensing purposes can be considered, radar technology is specialized for sensing and does not consider communication characteristics. Furthermore, transmitting and receiving nodes require separate devices to transmit and receive signals for wireless sensing purposes, which can pose limitations. To address these issues, methods for utilizing wireless sensing in wireless communication systems that support communication using cellular networks, such as 5G and / or next-generation 6G (e.g., ISAC or JCAS (Joint Communication And Sensing)) are being actively studied.
[0215] 3GPP standardization has begun a study on supporting ISAC in 5G / 6G. In TR 22.837 document published by 3GPP SA1 WG, wireless sensing is defined as a technology that uses radio waves to measure distance, angle, or instantaneous velocity to obtain information about the characteristics of the environment and / or surrounding objects. At this time, a scenario in which sensing and communication share the same frequency band and hardware is being considered, and the radio wave for sensing can share / reuse the radio wave for communication purposes (e.g., use of reference signals for communication purposes (e.g., SSB, DMRS, CSI-RS and / or SRS)) or design a separate radio wave for wireless sensing purposes.
[0216] Generally, wireless sensing supported by ISAC can be considered to be performed through a process in which a signal transmitted from a transmitter is reflected by a target object and received by a receiver, and a sensing mode for a scenario that is distinguished depending on the relationship between the transmitter and receiver can be defined. Based on whether the transmitter and receiver are identical, a case in which the transmitter and receiver are the same can be defined as a mono-static sensing mode, and a case in which the transmitter and receiver are different can be defined as a bi-static sensing mode.
[0217] Figure 12 illustrates examples of wireless sensing modes supported by ISAC.
[0218] Referring to Figure 12, when considering the transmission and reception operations and the nodes participating in them in the 3GPP standard, the sensing mode can be broadly classified as follows.
[0219] (a) BS mono-static sensing mode: BS that transmits radio waves receives the reflected signal.
[0220] (b) BS-to-BS bi-static sensing mode: A BS receives the reflected signal of a radio wave transmitted by another BS.
[0221] (c) BS-to-UE bi-static sensing mode: UE receives the signal reflected from the radio wave transmitted by BS.
[0222] (d) BS mono-static sensing mode: UE that transmits radio wave receives reflected signal
[0223] (e) UE-to-UE bi-static sensing mode: A UE receives the reflected signal of a radio wave transmitted by a specific transmitting UE.
[0224] (f) UE-to-BS bi-static sensing mode: BS receives the reflected signal of the radio wave transmitted by the transmitting UE.
[0225] However, in addition to the six use cases mentioned above, a sensing mode that includes multiple transmitting / receiving nodes can be referred to using the term multi-static sensing mode.
[0226] Wireless sensing via ISAC / JCAS is being considered for various scenarios. Generally, wireless sensing is intended to obtain information about a target without (or regardless of) a communication module. The scenarios considered can be broadly categorized into three categories.
[0227] (1) Object detection and tracking: A scenario for sensing target objects or people or tracking location information. Representative scenarios that can be considered include intruder detection in indoor / outdoor situations, location tracking of UAVs or AGVs, and autonomous driving support.
[0228] (2) Environment monitoring: A scenario for the purpose of collecting information about the environment around the transmitting / receiving node. Representative scenarios that can be considered include rainfall information observation and flood sensing scenarios.
[0229] (3) Motion monitoring: A scenario for sensing the motion of a target, such as a scenario for distinguishing human motion or gestures.
[0230] The performance metrics and levels required for each of the above scenarios vary and may differ from one another. To design an ISAC / JCAS suitable for the service quality required for each scenario, various key performance requirements must be considered. TS 22.137 of the 3GPP standard defines the following key performance requirements for each service scenario: positioning estimation accuracy, velocity estimation accuracy, confidence level, sensing resolution, missed detection probability, false alarm probability, sensing service maximum delay, and refreshing rate. The required levels for each key performance requirement may vary depending on the service scenario.
[0231] Radio frequency sensing capabilities can provide device-less object localization services because they do not require devices connected to the object via a network. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as diverse object sensing, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of a wireless sensing service, i.e., the sensing operation, may rely on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing can provide an opportunity to enhance existing communication systems from communication networks to wireless communication and sensing networks.
[0232] Figures 13 and 14 illustrate an example of applying ISAC to a 3GPP wireless communication system. The embodiments of Figures 13 and 14 can be combined with various embodiments of the present disclosure. Specifically, Figure 13 illustrates an example of sensing using a sensing receiver and a sensing transmitter located at the same location (e.g., monostatic sensing), and Figure 14 illustrates an example of sensing using a separate sensing receiver and sensing transmitter (e.g., bistatic sensing).
[0233] The suggestions discussed below can also be applied to the ISAC environment described above.
[0234] Setting the frequency / time domain of the frequency hopping pattern
[0235] 3GPP has been standardizing and developing technologies to support not only existing portable terminals but also various devices such as MTC / NB-IoT. One of these technologies is Reduced Capability (RedCap) NR, which requires cost benefits by lowering the capability of existing NR, is less sensitive to data rate, and requires less importance in terms of latency. Terminals that support RedCap include wearables, industrial wireless sensors, video surveillance, etc., and gain capability benefits through reduced supported bandwidth, reduced maximum supported number of MIMO layers, modulation order, Rx branches, etc., and half-duplex (HD) support in all bands.
[0236] The current 3GPP NR Rel-18 standard has set the target requirement for positioning accuracy for RedCap terminals, similar to the target performance requirement of Figure X1, and it has been agreed that the introduction of an enhanced positioning method is necessary to achieve this. In the case of RedCap terminals, the maximum frequency bandwidth supported by terminals that support existing NR is smaller than that of normal UEs, which may result in performance degradation in terms of decoding / detection accuracy of transmitted and received reference signals. Accordingly, frequency hopping is being considered and discussed as a key solution to improve the positioning accuracy of RedCap terminals. As of the current NR Rel-17 standard, frequency hopping operation through RRC parameter configuration is supported for SRS for MIMO resource(s) (i.e. SRS resource configured by SRS-Resource IE of TS 38.331 standard document), but frequency hopping operation is not supported for SRS for positioning resource(s) (i.e. SRS resource configured by SRS-PosResource IE of TS 38.331 standard document).
[0237] Implementing the above frequency hopping operation requires consideration of a hopping pattern. The hopping pattern refers to a structure in which the locations of frequency resources used in chronological order are determined by rules. In this case, considering the overhead of resources used when setting up the frequency hopping operation, a frequency hopping pattern that can be set up with fewer resources may be advantageous. Furthermore, considering the efficiency of frequency resources, a frequency hopping pattern that allows for UE multiplexing may be advantageous.
[0238] Considering these features and problems, the present invention proposes methods for determining the positions of each hop in the frequency domain and time domain when setting up a frequency hopping operation to support improving the accuracy performance of a UL SRS-based positioning technique of a RedCap UE.
[0239] This specification describes a proposed method focusing on an uplink-based positioning technique based on the 3GPP NR system. However, the proposed methods are not limited thereto and can be generally applied to other positioning techniques that can determine positioning by estimating the distance or direction between a transmitter and a receiver. Therefore, the proposed methods can be applied to all types of transmission / reception methods and positioning techniques expected by base stations and terminals without separate explanation.
[0240] This specification describes a method that proposes SRS as a reference signal based on the 3GPP NR system. However, the proposed methods are not limited thereto and can be generally applied to other reference signals transmitted and received for communication between a base station and a terminal, or between terminals. Therefore, the proposed methods can be applied to all types of transmission and reception methods and reference signals expected by a base station and a terminal even without separate description.
[0241] Each method proposed in the present invention can operate independently without separate combinations, or one or more methods can be combined and operated in a linked manner. Some terms, symbols, and sequences used may be replaced with other terms, symbols, and sequences.
[0242] Below, we propose a method for allocating frequency domain resources and time domain resources when performing frequency hopping operation of SRSp resources to support improving the accuracy of SRS-based positioning of RedCap terminals.
[0243] [Proposal 1] Frequency domain resource allocation using hopping pattern indication parameters and hop count parameters.
[0244] In the current (Rel-17) 3GPP NR standard, the frequency-domain starting position is defined through the c-srs, b-srs, and b-hop parameters configured for SRS-MIMO resources that support frequency hopping, and the m-srs value mapped in the SRS bandwidth configuration table. For SRSp resources that do not support frequency hopping, only parameters indicating the frequency bandwidth are supported, so only the transmission bandwidth can be configured, and the configuration of the frequency hopping operation of the SRSp resource is not supported.
[0245] Proposal 1 proposes a method of setting hopping behavior through a combination of a parameter indicating a hop bandwidth to determine the frequency domain starting position of each hop, a pattern index parameter indicating a hopping pattern, and / or a parameter indicating the number of hops.
[0246] As a concrete example, the relative frequency location index of each hop can be indicated by a mathematical combination of a pattern index parameter value indicating predefined hopping patterns, a hop number indicating parameter, and / or an SRS transmission occasion count parameter in the time domain, and the absolute frequency starting position of each hop can be determined by a frequency domain starting position of the indicated SRSp resource and a hop bandwidth indicating parameter.
[0247] The above proposed method can be applied to all kinds of hopping pattern indication parameter definition methods, and examples of defining it as the index of the most advanced hop and defining it as the hop index of the highest frequency band are described.
[0248] 1) Example 1: Hopping pattern parameter indicating the index of the most advanced hop
[0249] As an example of how to define a hopping pattern, the hopping pattern indication parameter can be defined to indicate the index of the most advanced hop, as shown in Table 1.
[0250] Frequency Hopping Pattern I FH pattern N hop 54320{0,1,2,3,4}{0,1,2,3}{0,1,2}{0,1}1{1,2,3,4,0}{1,2,3,0}{1,2,0}{1,0}2{2,3,4,0,1}{2,3,0,1}{2,0,1}3{3,4,0,1,2}{3,0,1,2}4{4,0,1,2,3}
[0251] Table 1 shows the parameters (I) that indicate the hopping pattern. FH pattern ) and the parameter (N) defined as the number of hops of the set frequency hopping pattern. hop ) defines a hopping pattern represented by a relative position in the frequency domain.
[0252] Based on the above hopping pattern, the frequency domain starting position of each hop can be calculated by modularly calculating the sum of the hopping pattern indication parameter and the SRS transmission occasion count parameter in the time domain as in mathematical expression 1, using the hop count parameter value.
[0253]
[0254] I in mathematical equation 1 FH pattern is the hopping pattern indication parameter, n srs is the SRS transmission occasion count parameter in the time domain, N b is the number of hops of the SRSp resource, N RB SC is the number of sub-carriers per RB, m srs,b is the frequency bandwidth per hop, n FHoffset means the offset from the frequency domain start position during FH operation.
[0255] (2) Example 2: Hopping pattern parameter indicating the hop index of the highest frequency band
[0256] As an example of how to define a hopping pattern, the hopping pattern indication parameter can be defined to indicate the hop index of the highest frequency band, as shown in Table 2.
[0257] Frequency Hopping Pattern I FH pattern N hop 54320{4,0,1,2,3}{3,0,1,2}{2,0,1}{1,0}1{3,4,0,1,2}{2,3,0,1}{1,2,0}{0,1}2{2,3,4,0,1}{1,2,3,0}{0,1,2}3{1,2,3,4,0}{0,1,2,3}4{0,1,2,3,4}
[0258] In this case, the frequency domain starting position of each hop can be calculated as in Equation 2.
[0259]
[0260] I in Equation 2 FH pattern is the hopping pattern indication parameter, n srs is the SRS transmission occasion count parameter in the time domain, N b is the number of hops of the SRSp resource, N RB SC is the number of sub-carriers per RB, m srs,b is the frequency bandwidth per hop, n FH offset means the offset from the frequency domain start position during FH operation.
[0261] The above explanation assumes that the offset from the frequency domain start position during FH operation is the lowest frequency of the frequency band in which FH operation occurs. However, other reference positions may be used. As a specific example, if the offset is based on the starting PRB of the earliest hop in the time domain, Equation 1 can be changed to Equation 3.
[0262]
[0263] When the proposed method is applied to the 3GPP NR standard, the c-srs parameter in the SRS-PosResource IE used for RRC signaling can be used as the proposed hop bandwidth indication parameter, and the proposed method is not limited to the type or term of the parameter, and can be used even when other parameters defined in the standard are used, or when new parameters are defined and used.
[0264] When the offset from the frequency domain start position of each hop is determined by the above proposed methods, additional movement in the frequency domain can be achieved by an overlapping operation between hops set by the base station or LMF at the determined offset of each hop. As a specific example, when the overlapping operation is performed by an RRC parameter indicating the overlap size, an additional offset from the frequency domain start position due to the overlap can be defined as in the following mathematical expression 4.
[0265]
[0266] n in equation 4 OL offset is the offset from the frequency domain start position during overlapping operation, n RB overlaprefers to the number of overlapped PRBs between adjacent hops in the frequency domain.
[0267] When the above proposed methods are applied, the number and size of the configuration parameters used are relatively small compared to the method of individually setting the frequency location of each hop, so there may be an advantage of reducing the overhead of the configuration resources used to set the frequency hopping operation of the SRSp resource.
[0268] Figure 15 illustrates an example of the operation of a terminal according to Proposal 1.
[0269] Referring to FIG. 15, the terminal can obtain configuration information of SRSp resource(s) provided by the base station (1505).
[0270] If the terminal is a RedCap terminal, the frequency hopping pattern used for SRSp resource transmission can be determined / identified through the frequency bandwidth parameter, hopping pattern indication parameter, and hop count indication parameter among the provided SRSp resource configuration information (1510).
[0271] Thereafter, the terminal transmits SRSp resources at the location(s) of the frequency resources set / indicated for hops that appear sequentially at the time of the set / indicated SRSp resource transmission (1515).
[0272] Figure 16 illustrates an example of base station operation according to Proposal 1.
[0273] Referring to FIG. 16, the base station can determine / generate configuration information including information on a frequency hopping pattern (1605). The base station can determine / generate the configuration information by referring to the configuration information related to SRSp resource(s) in the positioning information request message requested from the LMF. If the target terminal is a RedCap terminal, the frequency hopping operation of the SRSp resource to be transmitted can be configured through the frequency bandwidth parameter, hopping pattern indication parameter, and hop count indication parameter.
[0274] The base station can provide configuration information of the corresponding SRSp resource(s) to the terminal (1610).
[0275] Thereafter, the base station can receive the SRSp resource transmitted from the terminal at the location(s) of the frequency resource configured / indicated at the configured / indicated SRSp resource transmission time (1615). The base station can perform measurement for positioning using the received hops and then report the measurement to the LMF.
[0276] When the above proposed method is used, the LMF can request the configuration information of the SRSp resource(s) from the base station and can receive the SRSp resource configuration information actually set by the base station from the base station. The LMF receives the measured positioning-related measurement(s) from the base station using the SRSp resource transmitted from the terminal, and the LMF can estimate the position of the terminal through calculations using this measurement(s).
[0277] [Proposal 2] Setting / instructing switching times between adjacent hops for time-domain resource allocation
[0278] Below, we propose a method for allocating time domain resources and a method for determining switching time in the time domain.
[0279] In order for the RedCap terminal to perform the proposed frequency hopping operation, a switching time between hops is required to account for RF retuning for frequency band movement. In a time domain that considers RF retuning time, the switching time between adjacent hops can be set in two ways: by directly mapping the capabilities reported by the terminal to the base station upon initial connection to the base station to predefined switching time values, and by explicitly or implicitly instructing the terminal based on the capabilities reported by the terminal, the current network status, priorities, etc.
[0280] Option 1
[0281] As described above, one method for setting the switching time for frequency hopping of a terminal may be to map the capability reported by the terminal to the base station upon initial connection with the base station directly to predefined switching time values, and determine the switching time based on the UE capability reported by the terminal. As a specific example, the switching time values required of the terminal for frequency band movement may be defined, the corresponding UE capability may be defined, and the number of symbols configured for the switching time between hops may be determined based on the size of the subcarrier spacing used for transmission of the corresponding SRS resource and the UE capability reported by the terminal.
[0282] Option 2-1
[0283] As described above, one method for setting the switching time for frequency hopping of a terminal may be to have the base station provide other parameters for indicating the SRSp resource to which frequency hopping is applied, and based on this, the switching time may be implicitly indicated / set to the terminal. As an example of the base station operation for this, the base station may set parameters of SRS resources that take the switching time into account based on the capabilities reported by the terminal, the current network status, priorities, etc., and provide these parameters to the terminal.
[0284] As a specific example, in order to set the time resource allocation of the frequency hopping pattern, a parameter indicating the symbol duration of the total transmission of the SRSp resource (i.e., the total number of symbols including the transmission symbol and the symbols between hops from the time domain start position of the first hop of the SRSp resource to the transmission end point of the last hop), a parameter indicating the symbol length of each hop, and a parameter indicating the number of hops can be set by the base station and provided to the terminal, and the terminal can calculate the switching time between hops as in Equation 5 through these three parameters.
[0285]
[0286] N in Equation 5 switch symb is the switching time per symbol between hops, N SRS,total symb is the symbol duration of the total transmission of the SRSp resource, N hop symb is the symbol length of each hop, N hop means the number of hops.
[0287] Option 2-2
[0288] As described above, one way to set the switching time for the UE's frequency hopping may be to have the base station explicitly set the switching time to the UE using an explicit parameter indicating the switching time. As a specific example, the current standard time resource allocation of SRSp resources is performed from the base station through RRC signaling, which includes parameters indicating the starting symbol position in the time domain and the symbol length of the resource in the resourceMapping field of the SRS-PosResource IE. However, a new switchingTime parameter can be defined in the corresponding resourceMapping field to explicitly set the switching time information in units of symbols or time units (e.g., units of μs). As another example, a UE may have more than one UE capability for switching time, and if the UE supports multiple UE capabilities, it may be configured to report multiple UE capabilities. Alternatively, another method with the same effect may be configured to allow one UE capability to correspond to more than one switching time. If the UE reports UE capability(s) for the switching time of the terminal, the base station can select one of the switching times corresponding to the UE capability(s) reported by the terminal and set it for the terminal, and the terminal can set the switching time to be set based on the UE capability(s) reported by the terminal.
[0289] If the proposed methods of Option 2 above are applied, the base station can set the switching time considering multiplexing between terminals, and thus there may be an advantage of reducing the overhead of time resources due to the switching time.
[0290] Figure 17 illustrates the operation between a terminal, a base station, and an LMF according to Proposal 2.
[0291] Referring to FIG. 17, the terminal can provide UE capability information to the base station upon initial connection with the base station (1705).
[0292] The LMF can request configuration information of SRSp resource(s) from the base station (1710).
[0293] The terminal can obtain configuration information of the SRSp resource(s) provided by the base station (1715). For example, the base station can refer to the configuration information related to the SRSp resource(s) in the positioning information request message requested from the LMF and provide the configuration information of the corresponding SRSp resource(s) to the terminal. If the target terminal is a RedCap terminal, frequency hopping operation can be set and transmitted, and at this time, the switching time value can be explicitly or implicitly set according to the proposed method.
[0294] LMF can receive SRSp resource configuration information set by the actual base station from the base station.
[0295] The terminal transmits the SRSp resource in the configured / indicated time resource in the configured / indicated SRSp resource transmission frequency band (1720). The base station can receive the SRSp resource transmitted from the terminal at the location(s) of the configured / indicated frequency resource at the time of the configured / indicated SRSp resource transmission.
[0296] If the above terminal is a RedCap terminal, a frequency hopping operation can be performed according to the SRSp resource(s) configuration information provided from the base station, and the switching time value can be determined according to the determination method proposed in option 1 based on the capability information reported to the base station to determine the switching time value during the operation, or the switching time value can be explicitly set in the configuration information provided from the base station, or the switching time value can be calculated according to the method proposed in option 2 through the parameters in the configuration information provided from the base station.
[0297] As in the above option 2, a method is used in which the base station determines the switching time and provides it to the terminal, and if the terminal reports the UE capability corresponding to the size of the switching time to the base station, the base station can configure only the switching time greater than or equal to the size of the switching time corresponding to the UE capability reported by the terminal. The terminal can be configured to expect only the switching time greater than or equal to the size of the switching time corresponding to the UE capability based on the UE capability corresponding to the size of the switching time reported by the terminal.
[0298] The base station performs positioning measurements using the received SRSp hops and then reports the measurements to the LMF (1725). The LMF receives positioning-related measurements(s) measured using the SRSp resources transmitted from the terminal from the base station, and based on these measurements(s), the LMF can estimate the terminal's location through computation.
[0299] When the proposed method(s) are used, there may be an advantage in that configuration resources can be minimized by implicitly configuring the hop pattern index parameter rather than explicitly configuring each hop for frequency domain resource allocation of SRSp resources. In addition, the proposed configuration method may have an advantage in that the time resources allocated to frequency hopping transmission of SRSp resources can be minimized by supporting the allocation of SRSp resources with frequency hopping configured to multiple slots. Furthermore, there may be an advantage in that extensions are possible through a new definition of the pattern index for various frequency hopping patterns.
[0300] FIG. 18 illustrates a flowchart of a method for a terminal to transmit an uplink signal in a wireless communication system according to one embodiment.
[0301] Referring to FIG. 18, the terminal can receive configuration information for an uplink reference signal through upper layer signaling (A05).
[0302] The terminal can transmit the uplink reference signal across multiple uplink bands based on the above setting information (A10).
[0303] The above configuration information may include identification information for one uplink band among the plurality of uplink bands. The terminal may transmit the uplink reference signal sequentially by cycling through all of the plurality of uplink bands, starting from the one uplink band identified through the identification information.
[0304] The terminal can transmit the uplink reference signal by sequentially cycling through all of the plurality of uplink bands based on frequency hopping being set for the uplink reference signal through the setting information.
[0305] The above configuration information may include the total number of frequency hops for the frequency hopping.
[0306] A frequency hopping pattern for all of the plurality of uplink bands can be determined based on the number of total frequency hops and the identification information.
[0307] Consecutive frequency hops may at least partially overlap in the frequency domain. The configuration information may include information about the at least partially overlapping frequency resources.
[0308] The gap between the frequency hops in the time domain can be determined based on the total number of frequency hops and the number of symbols per hop.
[0309] The gap between the above frequency hops may be a time interval for frequency re-tuning of the terminal.
[0310] The sequential cycling of the plurality of uplink bands for transmission of the above uplink reference signal can be performed in ascending frequency order.
[0311] The above uplink reference signal may be a sounding reference signal.
[0312] The above uplink reference signal may be a sensing signal to support integrated sensing and communication (ISAC).
[0313] FIG. 19 illustrates a flowchart of a method for a base station to receive an uplink signal in a wireless communication system according to one embodiment.
[0314] Referring to FIG. 19, the base station can transmit configuration information for an uplink reference signal through upper layer signaling (B05).
[0315] Based on the above setting information, the base station can receive the uplink reference signal across multiple uplink bands (B10).
[0316] The above configuration information may include identification information for one uplink band among the plurality of uplink bands. The base station may sequentially cycle through the entire plurality of uplink bands, starting from the one uplink band identified through the identification information, and receive the uplink reference signal.
[0317] The base station can sequentially cycle through all of the plurality of uplink bands and receive the uplink reference signal based on frequency hopping being set for the uplink reference signal through the setting information.
[0318] The above configuration information may include the total number of frequency hops for the frequency hopping.
[0319] A frequency hopping pattern for all of the plurality of uplink bands can be indicated based on the number of total frequency hops and the identification information.
[0320] Consecutive frequency hops may at least partially overlap in the frequency domain. The configuration information may include information about the at least partially overlapping frequency resources.
[0321] The gap between the frequency hops in the time domain can be determined based on the total number of frequency hops and the number of symbols per hop.
[0322] The gap between the above frequency hops may be a time interval for frequency re-tuning of the terminal.
[0323] The sequential cycling of the plurality of uplink bands for receiving the above uplink reference signal can be performed in ascending frequency order.
[0324] The above uplink reference signal may be a sounding reference signal.
[0325] The above uplink reference signal may be a sensing signal to support integrated sensing and communication (ISAC).
[0326] Fig. 20 illustrates a communication system (1) applicable to this embodiment.
[0327] Referring to FIG. 20, a communication system (1) includes a wireless device, a base station, and a network. Here, the wireless device refers to 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. Although not limited thereto, 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 Things) device (100f), and an AI device / server (400). For example, 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. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.
[0328] 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. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).
[0329] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, 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 base station-to-base station communication (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of 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.
[0330] Figure 21 illustrates a wireless device applicable to the present disclosure.
[0331] Referring to FIG. 21, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR). Here, {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. 21.
[0332] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, 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). In addition, 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 code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a 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. In one embodiment of the present disclosure, the wireless device may mean a communication modem / circuit / chip.
[0333] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, 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). Furthermore, 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 code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, 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. In one embodiment of the present disclosure, a wireless device may also mean a communication modem / circuit / chip.
[0334] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more specific examples. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more 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 operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate signals (e.g., baseband signals) comprising PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) may 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, proposals, methods and / or operational flowcharts disclosed herein.
[0335] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, 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 operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.
[0336] 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 configured as 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.
[0337] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned 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 mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, 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, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can 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 user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.
[0338] Figure 22 illustrates another example of a wireless device applicable to the present disclosure. The wireless device may be implemented in various forms depending on the use case / service (see Figure 20).
[0339] Referring to FIG. 22, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 21 and may be composed of various elements, components, units / units, and / or modules. For example, 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). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 21. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 21. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) 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 store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).
[0340] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, 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. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 21, 100a), a vehicle (Fig. 21, 100b-1, 100b-2), an XR device (Fig. 21, 100c), a portable device (Fig. 21, 100d), a home appliance (Fig. 21, 100e), an IoT device (Fig. 21, 100f), a terminal for digital broadcasting, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 21, 400), a base station (Fig. 21, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.
[0341] In FIG. 22, 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). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.
[0342] Figure 23 illustrates a vehicle or autonomous vehicle applicable to the present disclosure. The vehicle or autonomous vehicle may be implemented as a mobile robot, car, train, manned / unmanned aerial vehicle (AV), ship, etc.
[0343] Referring to FIG. 23, a vehicle or autonomous vehicle (100) 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. 22, respectively.
[0344] 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.), and servers. 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 sensing 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, an illuminance sensor, a pedal position sensor, etc. 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.
[0345] For example, 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 driving plan based on the acquired data. The control unit (120) can control the drive 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). During autonomous driving, 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. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.
[0346] The embodiments described above are combinations of components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to combine some components and / or features to form an embodiment of the present disclosure. The order of operations described in the embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. Claims that do not have an explicit citation relationship in the claims may be combined to form an embodiment or may be incorporated as a new claim through a post-filing amendment.
[0347] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the technical features described herein. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present disclosure are intended to be included within the scope of the present disclosure.
[0348] The present disclosure can be used in various devices including a network of terminals, base stations, and / or location servers of a wireless mobile communication system.
Claims
1. In a method for a terminal to transmit an uplink signal in a wireless communication system, Receiving configuration information for uplink reference signals through upper layer signaling; and Based on the above setting information, transmitting the uplink reference signal across a plurality of uplink bands, The above configuration information includes identification information for one uplink band among the plurality of uplink bands, A method in which the terminal sequentially cycles through the plurality of uplink bands, starting from the one uplink band identified through the identification information, and transmits the uplink reference signal.
2. In paragraph 1, A method in which the terminal sequentially cycles through the plurality of uplink bands and transmits the uplink reference signal based on frequency hopping being set for the uplink reference signal through the setting information.
3. In paragraph 2, The above configuration information includes the total number of frequency hops for the frequency hopping, A method in which a frequency hopping pattern for all of the plurality of uplink bands is determined based on the number of total frequency hops and the identification information.
4. In paragraph 2, Consecutive frequency hops overlap at least partially in the frequency domain, A method wherein the above configuration information includes information about the at least partially overlapping frequency resources.
5. In paragraph 1, A method in which the gap between the frequency hops in the time domain is determined based on the total number of frequency hops and the number of symbols per hop.
6. In paragraph 5, A method wherein the gap between the above frequency hops is a time interval for frequency re-tuning of the terminal.
7. In paragraph 1, A method in which the sequential circulation of the plurality of uplink bands for transmission of the above uplink reference signal is performed in ascending order of frequency.
8. In paragraph 1, A method wherein the above uplink reference signal is a sounding reference signal.
9. In paragraph 1, A method wherein the above uplink reference signal is a sensing signal for supporting integrated sensing and communication (ISAC).
10. A computer-readable recording medium having recorded thereon commands for performing the method described in paragraph 1.
11. In a device for wireless communication, a memory configured to store instructions; and A processor configured to perform operations by executing the above instructions, The operations of the above processor are: Receiving configuration information for uplink reference signals through upper layer signaling; and Based on the above setting information, transmitting the uplink reference signal across a plurality of uplink bands, The above configuration information includes identification information for one uplink band among the plurality of uplink bands, The device transmits the uplink reference signal sequentially by cycling through the plurality of uplink bands starting from the one uplink band identified through the identification information.
12. In paragraph 11, The above device is a processing device for controlling a terminal operating in a wireless communication system.
13. In paragraph 11, The above device further comprises a transmitter and receiver, The above device is a terminal operating in a wireless communication system.
14. In a method for a base station to receive an uplink signal in a wireless communication system, Transmitting configuration information for uplink reference signals through upper layer signaling; and Based on the above setting information, including receiving the uplink reference signal across a plurality of uplink bands, The above configuration information includes identification information for one uplink band among the plurality of uplink bands, A method in which the base station sequentially cycles through the plurality of uplink bands, starting from the one uplink band identified through the identification information, and receives the uplink reference signal.
15. In a base station for wireless communication, a memory configured to store instructions; and A processor configured to perform operations by executing the above instructions, The operations of the above processor are: Transmitting configuration information for uplink reference signals through upper layer signaling; and Based on the above setting information, including receiving the uplink reference signal across a plurality of uplink bands, The above configuration information includes identification information for one uplink band among the plurality of uplink bands, The base station receives the uplink reference signal by sequentially cycling through the plurality of uplink bands starting from the one uplink band identified through the identification information.
Citation Information
Patent Citations
Method for transmitting uplink sounding reference signal for LTE system
EP3416330B1
Method for receiving SRS configuration information and terminal therefor
US10972241B2
Unified downlink control information for beam management
US11277301B2
SRS Hopping Pattern Based on UE Bandwidth Configuration
US20200244489A1
Method for performing uplink transmission in wireless communication system and apparatus therefor
US20200252241A1