Method and apparatus for activating or deactivating a semi-persistent sounding reference signal for positioning
Patent Information
- Application Number
- KR1020260026627
- Authority / Receiving Office
- KR · KR
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-07-21
- Filing Date
- 2026-02-10
- Publication Date
- 2026-09-14
Smart Images
Figure PAT00009_ABST
Abstract
Description
Technology Field
[0001] This specification relates to a wireless communication system applicable to 4G, 5G, and 6G. Background Technology
[0002] Along with the continuous advancement of mobile communication technology, the transition from 4G to 5G has brought about groundbreaking improvements in various aspects of wireless communication. These advancements are designed to meet the ever-increasing demands of modern applications, such as high-speed mobile broadband, massive connectivity for Internet of Things (IoT) devices, and ultra-reliable, low-latency communication. Key areas of 5G development can be classified into enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable, low-latency communication (URLLC), each focusing on meeting various use cases and requirements that were difficult to address with 4G technology.
[0003] Enhanced Mobile Broadband (eMBB)
[0004] In 4G, high-speed mobile broadband reaching up to 1Gbps was provided through Long-Term Evolution (LTE) technology. While this met the demands of high-definition video streaming, mobile gaming, and other high-volume data-based services, the increasing demand for higher speeds and larger data capacities necessitated further innovation. To address these challenges, 5G offers download speeds of up to 20Gbps and enables new applications such as 4K / 8K video streaming, virtual reality (VR), augmented reality (AR), and massive data transmission. Through the introduction of technologies such as Massive MIMO, beamforming, and the utilization of millimeter-wave frequency bands, 5G has been able to provide these enhanced capabilities, effectively meeting the growing demand for mobile broadband.
[0005] Massive Machine Type Communications (mmTC)
[0006] The emergence of the Internet of Things (IoT) has highlighted the need to connect a vast number of devices. However, 4G LTE technology was not optimized for large-scale device connectivity as it focused primarily on communication between people. Furthermore, 4G had limitations in terms of energy efficiency, scalability, and the ability to handle a large number of devices simultaneously. To address these issues, 5G introduced mMTC, which enables the connection of millions of devices with minimal energy consumption and long battery life. By leveraging Low-Power Wide-Area Networks (LPWAN) and network slicing, 5G ensures efficient connectivity for a wide range of IoT deployments, including large-scale IoT ecosystems such as smart cities, agriculture, and healthcare.
[0007] Ultra-Reliable Low-Latency Communications (URLLC)
[0008] While 4G networks provided low latency for mobile broadband, they were not optimized for the ultra-reliable real-time communication essential for applications such as autonomous driving, remote surgery, and industrial automation. The need for Ultra-Reliable Low Latency Communication (URLLC), which requires near-instantaneous response times, led to the development of this technology in 5G. In 5G, latency is reduced to a minimum of 1 millisecond (ms), enabling real-time communication and control. This advancement is essential for applications requiring immediate decision-making, which is critical for autonomous vehicles relying on real-time vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication, as well as for remote medical procedures and industrial automation systems requiring precise and immediate control.
[0009] These advancements have established 5G as a core technology transforming how industries operate and how society interacts with the digital world. The continuous evolution from 4G to 5G represents a significant leap forward that enables new use cases, increases network efficiency, and enhances the user experience.
[0010] Moving forward, 6G is expected to further expand the capabilities of 5G, focusing on higher speeds, ultra-high reliability, and the integration of advanced technologies such as artificial intelligence (AI) and holographic communication. 6G is anticipated to enable more immersive and seamless experiences through true ubiquitous connectivity, advanced immersive technologies like Mixed Reality (XR), and zero-latency real-time autonomous systems. The evolution from 4G to 5G, and ultimately to 6G, demonstrates the continuous advancement of wireless communication technology and the increasingly important role these technologies are playing in shaping the future of the digital world. The problem to be solved
[0011] The disclosure of this specification aims to provide a method and apparatus for efficiently enabling or disabling a semi-persistent (SP) positioning sounding reference signal (SRS) in a wireless communication system. means of solving the problem
[0012] Embodiments of the present specification provide a method in a wireless communication system in which a terminal receives a medium access control (MAC) control element (CE) for activating or deactivating an SP positioning SRS resource set and can activate or deactivate said SP positioning SRS resource set. Herein, the MAC CE may include a first field indicating whether to activate or deactivate the SP positioning SRS resource set and a second field indicating the type of spatial relationship information. The type of spatial relationship information may be associated with one of i) a channel state information-reference signal (CSI-RS) resource index, ii) a synchronization signal block (SSB) index, iii) an SRS resource index, and iv) a downlink-positioning reference signal (DL-PRS) index.
[0013] Additionally, embodiments of the present specification provide a device comprising a processor configured to enable or disable an SP positioning SRS resource set, wherein the terminal in a wireless communication system receives a medium access control (MAC) control element (CE) for enabling or disabling an SP positioning SRS resource set, and enables or disables said SP positioning SRS resource set. Herein, the MAC CE may include a first field indicating whether to enable or disable an SP positioning SRS resource set and a second field indicating a type of spatial relationship information. The type of spatial relationship information may be associated with one of i) a channel state information-reference signal (CSI-RS) resource index, ii) a synchronization signal block (SSB) index, iii) an SRS resource index, and iv) a downlink-positioning reference signal (DL-PRS) index.
[0014] The value of the second field above may correspond to one of 00 for the CSI-RS resource index, 01 for the SSB index, 10 for the SRS resource index, and 11 for the DL-PRS index.
[0015] If the value of the second field is set to 10 for the SRS resource index, the MAC CE may further include a third field indicating a first index corresponding to the SRS resource or a second index corresponding to the positioning SRS resource. Additionally, if the MAC CE is used to activate the SP positioning SRS resource set while the RRC (radio resource control) is inactive, the third field may indicate only the second index corresponding to the positioning SRS resource.
[0016] The above positioning SRS resource set can be disabled initially.
[0017] The terminal can transmit an SRS based on the above-mentioned activated SP positioning SRS resource set.
[0018] If the value of the second field is set to 10 for the SRS resource index, the MAC CE may further include a fourth field representing a resource type of one of the SRS resource or the positioning SRS resource.
[0019] When the above MAC CE is used to activate the above SP positioning SRS resource set while the RRC is inactive, setting the value of the above second field to 00, which indicates the above CSI-RS resource index, may not be applied.
[0020] Meanwhile, the MAC CE may further include a fifth field positioned after the first field to indicate the RRC inactive state. Here, if the value of the fifth field is set to 1, the third field may be limited to indicating only the second index corresponding to the positioning SRS resource. Effects of the invention
[0021] According to the disclosure of this specification, the activation or deactivation of a semi-persistent (SP) positioning sounding reference signal (SRS) in a wireless communication system can be performed efficiently. Brief explanation of the drawing
[0022] Figure 1 shows a wireless communication system. Figure 2 shows the UE state machine and state transition in NR. Figure 3 shows an exemplary procedure for setting and activating SP positioning SRS. Figure 4 shows a MAC (medium access control) CE (control element) for SP positioning SRS activation and deactivation. Figures 5a to 5d show various spatial relationship fields within the MAC CE for SP positioning SRS activation. FIG. 6 is a flowchart illustrating a method of operation of a terminal according to one embodiment of the present specification. FIG. 7 is a block diagram illustrating devices according to one embodiment of the present specification. Specific details for implementing the invention
[0023] The technical terms used in this specification are intended to describe specific embodiments and should not be interpreted in a limiting sense. Unless otherwise defined, these terms should be interpreted in the sense generally understood by those skilled in the art and should not be interpreted too broadly or too narrowly. Furthermore, if a specific term does not fully represent the intent of this specification, it should be understood in the most accurate technical term recognized by those skilled in the art.
[0024] A slash ( / ) or a comma used in this specification may mean “and / or.” For example, “A / B” may mean “A and / or B,” which may mean “A only,” “B only,” or “A and B both.”
[0025] Figure 1 shows a wireless communication system.
[0026] Referring to FIG. 1, the NR wireless communication system can be divided into a 5G core network (5GC) and a next-generation radio access network (NG-RAN), and the NG-RAN may include base stations (gNB and / or ng-eNB) that provide user plane and control plane protocol termination to user equipment (UE). The gNB (next-generation-Node B) provides NR user plane and control plane protocol termination to the user equipment (UE), and the ng-eNB (next-generation-evolved Node B) provides E-UTRA (evolved-universal terrestrial radio access) user plane and control plane protocol termination to the user equipment (UE). The user equipment (UE) may be fixed or mobile and may be referred to by other terms such as MS (mobile station), UT (user terminal), SS (subscriber station), MT (mobile terminal), or wireless device. A base station (gNB and / or ng-eNB) may be a fixed station that communicates with a terminal (UE) and may be referred to by other terms such as a base transceiver system (BTS) or an access point.
[0027] Base stations (gNB and / or ng-eNB) can be connected to each other via an Xn interface and can be connected to the 5GC (5G core network) via an NG interface. Specifically, base stations (gNB and / or ng-eNB) can be connected to the access and mobility management function (AMF) via an NG-C interface and to the user plane function (UPF) via an NG-U interface.
[0028] Figure 2 shows the UE state machine and state transition in NR.
[0029] The UE is in the RRC_CONNECTED or RRC_INACTIVE state if an RRC connection is established. Otherwise, that is, if an RRC connection is not established, the UE is in the RRC_IDLE state. RRC states can be further characterized as follows:
[0030] 1. RRC_IDLE:
[0031] - UE-specific DRX (Discontinuous Reception) can be configured from the upper layer;
[0032] - At the lower layer, the UE can be configured as a DRX for Point-to-Multipoint (PTM) transmission of Multicast Services (MBS) broadcasts;
[0033] - UE-controlled mobility based on network configuration;
[0034] - The UE performs the following:
[0035] i) Monitoring of short messages transmitted to P-RNTI (Paging-RNTI) via DCI (Downlink Control Information);
[0036] ii) Monitor the Core Network (CN) paging channel using 5G-S-TMSI (5G-Serving-Temporary Mobile Subscriber Identity). However, this excludes cases where the UE operates as a Layer 2 (L2) UE-to-Network (U2N) remote UE;
[0037] iii) If configured by the upper layer for MBS multicast reception, monitor the CN paging channel using TMGI (Temporary Mobile Group Identity);
[0038] iv) Perform neighbor cell measurement and cell (re-)selection;
[0039] v) Perform measurements on L2 U2N relay UE and relay (re-)selection;
[0040] vi) Acquisition of system information and transmission of SI requests (if configured);
[0041] vii) Log measurement. For UEs configured to log measurements, perform logging of possible measurements along with location and time;
[0042] viii) Perform idle / inactive measurements on UEs configured for idle / inactive measurements;
[0043] ix) If configured by the upper layer for MBS broadcast reception, obtain MCCH (MBS Control Channel) change notification and MBS broadcast control information and data.
[0044] 2. RRC_INACTIVE:
[0045] - UE-specific DRX can be configured by the upper layer or RRC layer;
[0046] - At the lower layer, the UE can be configured as a DRX for PTM transmission of MBS broadcasts and / or a DRX for PTM transmission of MBS multicasts;
[0047] - UE-controlled mobility based on network configuration;
[0048] - The UE stores the UE inactive AS (Access Stratum) context;
[0049] - RAN-based notification areas are established by the RRC layer;
[0050] - Transmit unicast data and / or signaling to the UE via a wireless bearer configured for SDT.
[0051] - The UE performs the following:
[0052] i) Monitoring short messages transmitted to P-RNTI via DCI;
[0053] ii) While T319a is operating, monitor the control channel associated with the shared data channel to determine whether data has been scheduled;
[0054] iii) Monitoring of paging channels for CN paging using 5G-S-TMSI and RAN paging using fullI-RNTI (full Inactive RNTI), except when T319a is not operating and the UE is operating as an L2 U2N remote UE;
[0055] iv) If configured by the upper layer for MBS multicast reception, monitor the paging channel using TMGI while T319a is not operating;
[0056] v) Perform neighbor cell measurement and cell (re-)selection;
[0057] vi) Perform measurements for L2 U2N relay UE and relay (re-)selection;
[0058] vii) Perform periodic RAN-based notification area updates and perform when moving outside the configured RAN-based notification area;
[0059] viii) Acquire system information and, if the SDT (Small Data Transmission) procedure is not in progress, send a SI (System Information) request (if configured);
[0060] ix) While the SDT procedure is not in progress, log possible measurements along with the location and time of the UE configured for log measurement;
[0061] x) Perform idle / inactive measurements on UEs configured for idle / inactive measurements while the SDT procedure is not in progress;
[0062] xi) If configured by the upper layer for MBS broadcast reception, obtain MCCH change notification and MBS broadcast control information and data;
[0063] xii) When configured for MBS multicast reception in RRC_INACTIVE, obtain multicast MCCH change notifications and MBS multicast control information and data;
[0064] xiii) Transmission of SRS (Sounding Reference Signal) for positioning.
[0065] 3. RRC_CONNECTED:
[0066] - The UE stores the UE AS (Access Stratum) context;
[0067] - Transmit and receive unicast data with UE;
[0068] - Send MBS multicast data to the UE;
[0069] - At the lower layer, the UE can be set to a UE-specific DRX;
[0070] - At the lower layer, the UE can be configured as a DRX for PTM transmission of MBS broadcast and / or a DRX for MBS multicast;
[0071] - At the lower layer, the UE can be set to a cell-specific cell DTX / DRX;
[0072] - For UEs supporting CA (Carrier Aggregation), use one or more SCells (Secondary Cells) aggregated with SpCells (Special Cells) to expand bandwidth;
[0073] - For UEs supporting DC (Dual Connectivity), use a single SCG (Secondary Cell Group) aggregated with an MCG (Master Cell Group) to expand bandwidth;
[0074] - Network-controlled mobility within NR, to / from E-UTRA, and UTRA-FDD;
[0075] - Network control mobility (path switching) between the serving cell and the L2 U2N relay UE or vice versa, or between the source L2 U2N relay UE and the target L2 U2N relay UE;
[0076] - Network control MP (Multi-Path) operation.
[0077] - The UE performs the following:
[0078] i) Monitoring short messages transmitted to P-RNTI via DCI when configured;
[0079] ii) Monitor the control channel associated with the shared data channel to determine whether data has been scheduled;
[0080] iii) Provide channel quality and feedback information;
[0081] iv) Measurement of adjacent cells and / or L2 U2N relays and measurement reporting;
[0082] v) Acquisition of system information;
[0083] vi) Perform immediate MDT measurements along with reporting possible locations;
[0084] vii) If configured from the upper layer to receive MBS broadcasts, obtain MCCH change notifications and MBS broadcast control information and data.
[0085] Figure 3 shows an exemplary procedure for setting and activating SP positioning SRS.
[0086] Referring to FIG. 3, a terminal (UE) receives SRS setting information from a base station (gNB) that includes the setting of at least one SP positioning SRS resource set (S301). After receiving, the terminal stores the setting of the SP positioning SRS resource set (S302), and this setting may include information such as a resource identifier, periodicity, antenna port, frequency and time domain parameters, and spatial relationship setting.
[0087] Subsequently, the terminal (UE) receives an activation command (e.g., a MAC control element, CE) from the base station (gNB) to activate a set of SP positioning SRS resources (S303). The terminal (UE) activates the specified set of SP positioning SRS resources based on the received activation command (S304). Subsequently, the terminal (UE) transmits an SRS based on the activated set of SP positioning SRS resources (S305), thereby enabling the network (e.g., a gNB or a location management entity) to perform uplink-based positioning measurements.
[0088] When an SP positioning SRS is set by a higher-level parameter such as SRS-PosResource and a higher-level parameter spatialRelationInfoPos (i.e., spatial relation information for positioning) is also set, spatialRelationInfoPos contains an identity for a configuration field of a reference signal (RS). The reference RS may be one of the following: an SRS set by an SRS resource (SRS-Resource) or an SRS positioning resource (SRS-PosResource), a channel state information-reference signal (CSI-RS), a synchronization signal / physical broadcast channel (SS / PBCH) block, or a downlink positioning reference signal (DL PRS), each of which may be set in either a serving cell or a non-serving cell.
[0089] In particular, when the terminal is configured to transmit SP positioning SRS in the RRC_INACTIVE state, spatialRelationInfoPos can continue to be applied except when the reference RS is an SRS set by SRS-Resource or a CSI-RS. In such cases, only the SRS set by SRS-PosResource can be used as a valid reference signal to indicate spatial relationships in the MAC (medium access control) CE (control element) for activating SP positioning SRS. That is, in the RRC_INACTIVE state, NZP (non-zero power) CSI-RS or the SRS set by SRS-Resource cannot be used as a reference RS to indicate spatial relationships. The above upper layer parameters are transmitted from the base station to the terminal.
[0090] Figure 4 shows a MAC (medium access control) CE (control element) for SP positioning SRS activation and deactivation.
[0091] Figure 4 illustrates the details of a MAC CE for enabling or disabling the SP positioning SRS. The SP positioning SRS enable / disable MAC CE is identified by a MAC subheader having an extended logical channel ID (eLCID) value. The MAC CE consists of an array of 8-bit octets and has a variable-length structure having the following fields.
[0092] - A / D: This field indicates whether to enable or disable the specified SP positioning SRS resource set. If this field is set to 1, it indicates enable; otherwise, it indicates disable.
[0093] - Positioning SRS Resource Set's Cell ID: This field indicates the identity of the serving cell containing the SP Positioning SRS resource set being enabled or disabled. If MAC CE is used to enable / disable SP Positioning SRS transmission in the RRC_INACTIVE state, this field indicates the identity of the cell that received the Positioning SRS setting. Additionally, if the C field is set to 0, this field (if present) is the resource ID i Spatial Relation for Resource ID i It also indicates the identity of the serving cell containing all resources indicated by the fields. The length of this field is 5 bits.
[0094] - C: This field is a resource ID consisting of octets containing the Resource Serving Cell ID field and the Resource BWP ID field. i Spatial Relation for Resource ID i Indicates whether it exists within the ) field. Note: This applies only to resource IDs corresponding to DL-PRS or SSB. i Spatial Relation for Resource ID i ) is excluded. If the A / D field is set to 1, and this C field is set to 1, the resource ID i Indicates that octets containing the Resource Serving Cell ID field and the Resource BWP ID field exist within the spatial relationship field for, and if set to 0, indicates that they do not exist. If the A / D field is set to 0, this field is always set to 0, indicating that the corresponding octets do not exist.
[0095] - SUL: This field indicates whether the MAC CE applies to the normal uplink (NUL) carrier setting or the supplementary uplink (SUL) carrier setting. If this field is set to 1, it indicates that it applies to the SUL carrier setting, and if it is set to 0, it indicates that it applies to the NUL carrier setting.
[0096] - Positioning SRS Resource Set ID: This field represents the SRS-PosResourceSetId that identifies the SP Positioning SRS resource set to be enabled or disabled. The length of this field is 4 bits.
[0097] - Resource ID i Spatial Relation for Resource ID i ): This field is the resource ID i Spatial Relation for Resource ID i ) exists only when MAC CE is used for activation, i.e., when the A / D field is set to 1. M indicates the total number of Positioning SRS resources set under the SP Positioning SRS resource set indicated by the Positioning SRS Resource Set ID field. Resource ID i Spatial Relation for Resource ID i There are a total of four types, which are indicated by the F (F0 and F1) fields within the corresponding field. Resource ID i Spatial Relation for Resource ID i The fields included within are the four types of resource IDs shown in FIGS. 5a to 5d. i Spatial Relation for Resource IDi It corresponds to ).
[0098] - S: This field is the resource ID for positioning SRS resource i within the positioning SRS resource set. i Spatial Relation for Resource ID i Indicates the existence of the fields. If the corresponding field is set to 1, it is the resource ID. i Spatial Relation for Resource ID i ) Fields exist, otherwise they do not exist.
[0099] - R: Reserved bit, set to 0.
[0100] Figures 5a to 5d show various spatial relationship fields within the MAC CE for SP positioning SRS activation.
[0101] Four types of “Resource IDs” corresponding to NZP CSI-RS, SSB, SRS, and DL-PRS, respectively. i Spatial Relation for Resource ID i The “Resource ID” field is illustrated in FIGS. 5a through 5d, respectively. i Spatial Relation for Resource ID i The )” field consists of the following fields.
[0102] - F0: This field indicates the type of resource used as a spatial relation to the i-th positioning SRS resource within the positioning SRS resource set indicated by the positioning SRS resource set ID field. This field is set as follows: 00 indicates the use of an NZP CSI-RS resource index, 01 indicates an SSB index, 10 indicates an SRS resource index, and 11 indicates the use of a DL-PRS index. The length of this field is 2 bits. If MAC CE is used for SP SRS activation in the RRC_INACTIVE state, this field must not be set to 00.
[0103] - F1: This field indicates the type of SRS resource used as a spatial relationship for the i-th positioning SRS resource within the SP positioning SRS resource set indicated by the positioning SRS resource set ID field when the F0 field is set to 10. If this field is set to 0, it indicates that the SRS resource index (SRS-ResourceId) is used, and if it is set to 1, it indicates that the positioning SRS resource index (SRS-PosResourceId) is used.
[0104] - NZP CSI-RS Resource ID: This field contains an “NZP-CSI-RS-ResourceID” index representing an NZP CSI-RS resource used to derive the spatial relationship of a positioning SRS. The length of this field is 8 bits.
[0105] - SSB Index: This field contains the SSB index (SSB-Index). The length of this field is 6 bits.
[0106] - PCI: This field contains the physical cell identity (PhysCellId). The length of this field is 10 bits.
[0107] - SRS Resource ID: If the F1 field is set to 0, this field represents the index for the SRS resource (SRS-ResourceId); if the F1 field is set to 1, it represents the index for the positioning SRS resource (SRS-PosResourceId). When MAC CE is used to enable SP SRS in the RRC_INACTIVE state, this field may represent only the index for the positioning SRS resource (SRS-PosResourceId) set in the RRC_INACTIVE state. The length of this field is 5 bits, and it represents indices from 0 to 31.
[0108] - E: This field indicates the extension of the SRS resource ID and is used as the most significant bit (MSB) of the SRS resource ID. The total length of the extended SRS resource ID is 6 bits. If the E bit is set to 1, the SRS resource ID value becomes the 5-bit SRS resource ID field value plus 32.
[0109] - DL-PRS Resource Set ID: This field contains the index for the DL-PRS resource set (nr-DL-PRS-ResourceSetId). The length of this field is 3 bits.
[0110] - DL-PRS Resource ID: This field contains the index for the DL-PRS resource (nr-DL-PRS-Resource-Id). The length of this field is 6 bits.
[0111] - DL-PRS ID: This field contains the identifier of the DL-PRS resource (dl-PRS-ID). The length of this field is 8 bits.
[0112] - PI: This field is the resource ID containing the DL-PRS. i Spatial Relation for Resource ID iIndicates whether a DL-PRS resource ID field exists within ). If the field is set to 1, an octet containing a DL-PRS resource ID field exists, otherwise the octet is omitted.
[0113] - SI: This field is the resource ID containing the SSB. i Spatial Relation for Resource ID i Indicates whether an SSB index field exists within ). If the field is set to 1, an octet containing the SSB index field exists; otherwise, the octet is omitted.
[0114] - Resource Serving Cell ID i : This field represents the identifier of the serving cell where the resource is located, used to derive spatial relationships for the i-th positioning SRS resource. The length of this field is 5 bits.
[0115] - Resource BWP ID i : This field represents the UL BWP where the resource is located, used to derive spatial relationships for the i-th positioning SRS resource, as a codepoint of the DCI bandwidth part indication field. The length of this field is 2 bits.
[0116] FIG. 6 is a flowchart illustrating a method of operation of a terminal according to one embodiment of the present specification.
[0117] Referring to FIG. 6, the terminal receives a MAC (medium access control) CE (control element) for activating or deactivating a semi-persistent (SP) positioning SRS (sounding reference signal) resource set (S601). Subsequently, the terminal activates or deactivates the SP positioning SRS resource set (S602). The MAC CE may include a first field indicating whether to activate or deactivate the SP positioning SRS resource set and a second field indicating the type of spatial relationship information. The type of spatial relationship information may be associated with one of i) a CSI-RS (channel state information-reference signal) resource index, ii) an SSB (synchronization signal block) index, iii) an SRS resource index, and iv) a DL-PRS (downlink-positioning reference signal) index.
[0118] The value of the second field above may correspond to one of 00 for the CSI-RS resource index, 01 for the SSB index, 10 for the SRS resource index, and 11 for the DL-PRS index.
[0119] If the value of the second field is set to 10 for the SRS resource index, the MAC CE may further include a third field indicating a first index corresponding to the SRS resource or a second index corresponding to the positioning SRS resource. Additionally, if the MAC CE is used to activate the SP positioning SRS resource set while the RRC (radio resource control) is inactive, the third field may indicate only the second index corresponding to the positioning SRS resource.
[0120] The above positioning SRS resource set can be disabled initially.
[0121] The terminal can transmit an SRS based on the above-mentioned activated SP positioning SRS resource set.
[0122] If the value of the second field is set to 10 for the SRS resource index, the MAC CE may further include a fourth field representing a resource type of one of the SRS resource or the positioning SRS resource.
[0123] When the above MAC CE is used to activate the above SP positioning SRS resource set while the RRC is inactive, setting the value of the above second field to 00, which indicates the above CSI-RS resource index, may not be applied.
[0124] Meanwhile, when the terminal is configured to transmit SP positioning SRS in the RRC_INACTIVE state, only the SRS set by SRS-PosResource can be used as a valid reference signal when indicating spatial relationships through the MAC CE described above to activate it. Additionally, to clarify that the MAC CE applies to the RRC_INACTIVE state, the "R(reserved)" bit shown in FIG. 4 can be utilized. That is, when the "R" bit is set to 1, it indicates the RRC_INACTIVE state, and in association with the "R" bit being set to 1, the third field described above can indicate only the second index corresponding to the positioning SRS resource. Here, the name "R" may be changed to "I(inactive)", etc.
[0125] The disclosures of this specification described so far may be implemented through various means. For example, the disclosures of this specification may be implemented in hardware, firmware, software, or a combination thereof. Specifically, they will be described with reference to the drawings below.
[0126] FIG. 7 is a block diagram illustrating devices according to one embodiment of the present specification.
[0127] Referring to FIG. 7, the wireless communication system may include a network (100a), a first device (100b), and a second device (100c).
[0128] The above network (100a) may be a base station, a network node, a device related to 5G services, or other devices related to the Fourth Industrial Revolution.
[0129] The first device (100b) may be a transmission terminal, a receiving terminal, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with autonomous driving functions, a connected car, a drone (Unmanned Aerial Vehicle, UAV), an AI (Artificial Intelligence) module, a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, a MR (Mixed Reality) device, a hologram device, a public safety device, an MTC (Machine-Type Communication) device, an IoT device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, a device related to 5G services, or any other device related to the field of the Fourth Industrial Revolution.
[0130] The second device (100c) may be a transmission terminal, a receiving terminal, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with autonomous driving functions, a connected car, a drone (Unmanned Aerial Vehicle, UAV), an AI (Artificial Intelligence) module, a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, a MR (Mixed Reality) device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, a device related to 5G services, or any other device related to the field of the Fourth Industrial Revolution.
[0131] The network (100a) may include at least one processor, such as a control unit (1010a), at least one memory, such as a memory (1020a), and at least one radio frequency unit, such as a radio frequency unit (1030a). The control unit (1010a) may perform the aforementioned functions, procedures, and / or methods. The control unit (1010a) may perform one or more protocols. For example, the control unit (1010a) may perform and manage one or more layers of a wireless interface protocol. The memory unit (1020a) is connected to the control unit (1010a) and may store various forms of information and / or commands. The radio frequency unit (1030a) is connected to the control unit (1010a) and may be controlled to transmit and receive radio signals.
[0132] The first device (100b) may include at least one processor, such as a control unit (1010b), at least one memory, such as a memory (1020b), and at least one radio frequency unit, such as a radio frequency unit (1030b). The control unit (1010a) may perform the aforementioned functions, procedures, and / or methods. The control unit (1010b) may perform one or more protocols. For example, the control unit (1010b) may perform and manage one or more layers of a wireless interface protocol. The memory unit (1020b) is connected to the control unit (1010b) and may store various forms of information and / or commands. The radio frequency unit (1030b) is connected to the control unit (1010b) and may be controlled to transmit and receive radio signals.
[0133] The second device (100c) may include at least one processor, such as a control unit (1010c), at least one memory, such as a memory (1020c), and at least one radio frequency unit, such as a radio frequency unit (1030c). The control unit (1010c) may perform the aforementioned functions, procedures, and / or methods. The control unit (1010c) may perform one or more protocols. For example, the control unit (1010c) may perform and manage one or more layers of a wireless interface protocol. The memory unit (1020c) is connected to the control unit (1010c) and may store various forms of information and / or commands. The radio frequency unit (1030c) is connected to the control unit (1010c) and may be controlled to transmit and receive radio signals.
[0134] The memory unit (1020a), the memory unit (1020b), and / or the memory unit (1020c) may each be connected internally or externally to the control unit (1010a), the control unit (1010b), and / or the control unit (1010c), and may also be connected to other control units through various technologies such as wired or wireless connections.
[0135] Although preferred embodiments have been described by way of example above, the disclosure of this specification is not limited to such specific embodiments, and may be modified, changed, or improved in various forms within the scope of the spirit and claims of this specification.
[0136] In the exemplary system described above, methods are described based on a flowchart as a series of steps or blocks, but are not limited to the order of the described steps, and some steps may occur in a different order or simultaneously with other steps as described above. Furthermore, a person skilled in the art will understand that the steps shown in the flowchart are not exclusive, and that other steps may be included, or that one or more steps of the flowchart may be omitted without affecting the scope of rights.
[0137] The claims described in this specification may be combined in various ways. For example, the technical features of the method claims in this specification may be combined to be implemented as a device, and the technical features of the device claims in this specification may be combined to be implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a device, and the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a method.
Claims
Claim 1 A method of operation of a terminal in a wireless communication system, comprising the step of receiving a MAC (medium access control) CE (control element) for activating or deactivating a semi-persistent (SP) positioning SRS (sounding reference signal) resource set;The method includes the step of activating or deactivating the SP positioning SRS resource set, wherein the MAC CE includes a first field indicating whether to activate or deactivate the SP positioning SRS resource set and a second field indicating the type of spatial relationship information, wherein the type of spatial relationship information is associated with one of i) a CSI-RS (channel state information-reference signal) resource index, ii) a SSB (synchronization signal block) index, iii) an SRS resource index, and iv) a DL-PRS (downlink-positioning reference signal) index, and the value of the second field corresponds to one of 00 for the CSI-RS resource index, 01 for the SSB index, 10 for the SRS resource index, and 11 for the DL-PRS index, and if the value of the second field is set to 10 for the SRS resource index, the MAC CE further includes a third field indicating a first index corresponding to the SRS resource or a second index corresponding to the positioning SRS resource. A method comprising, wherein, when the MAC CE is used to activate the SP positioning SRS resource set in a radio resource control (RRC) inactive state, i) the second field is limited to one of the values corresponding to the SSB index, the SRS resource index, and the DL-PRS index, excluding the CSI-RS resource index, and ii) the third field indicates only the second index corresponding to the positioning SRS resource; Claim 2 A method according to claim 1, wherein the positioning SRS resource set is initially deactivated. Claim 3 A method according to claim 1, further comprising the step of transmitting an SRS based on the activated SP positioning SRS resource set. Claim 4 A method according to claim 1, wherein when the value of the second field is set to 10 for the SRS resource index, the MAC CE further includes a fourth field representing a resource type of one of the SRS resource or the positioning SRS resource. Claim 5 A method according to claim 1, wherein the MAC CE further comprises a fifth field positioned after the first field to indicate the RRC inactive state, and when the value of the fifth field is set to 1, the third field is limited to indicating only the second index corresponding to the positioning SRS resource. Claim 6 A terminal in a wireless communication system, wherein the terminal receives a MAC (medium access control) CE (control element) for activating or deactivating a semi-persistent (SP) positioning SRS (sounding reference signal) resource set, and comprises a processor configured to activate or deactivate said SP positioning SRS resource set, wherein the MAC CE comprises a first field indicating whether to activate or deactivate the SP positioning SRS resource set and a second field indicating a type of spatial relationship information, wherein the type of spatial relationship information is associated with one of i) a CSI-RS (channel state information-reference signal) resource index, ii) an SSB (synchronization signal block) index, iii) an SRS resource index, and iv) a DL-PRS (downlink-positioning reference signal) index, and the value of said second field is 00 for said CSI-RS resource index, 01 for said SSB index, 10 for said SRS resource index, and said A terminal, wherein the MAC CE corresponds to one of 11 for the DL-PRS index and, when the value of the second field is set to 10 for the SRS resource index, the MAC CE further comprises a third field indicating a first index corresponding to the SRS resource or a second index corresponding to the positioning SRS resource, and when the MAC CE is used to activate the SP positioning SRS resource set in an RRC (radio resource control) inactive state, the third field indicates only the second index corresponding to the positioning SRS resource. Claim 7 In paragraph 6, the positioning SRS resource set is initially disabled, terminal. Claim 8 In paragraph 6, the terminal, wherein the processor is further configured to transmit an SRS based on the activated SP positioning SRS resource set. Claim 9 In claim 6, when the value of the second field is set to 10 for the SRS resource index, the MAC CE further comprises a fourth field indicating a resource type of one of the SRS resource or the positioning SRS resource. Claim 10 A terminal according to claim 6, wherein the MAC CE further comprises a fifth field positioned after the first field to indicate the RRC inactive state, and when the value of the fifth field is set to 1, the third field is limited to indicating only the second index corresponding to the positioning SRS resource.