KR20230150097A - APPARATUS and method for reporting information on UE transmission timing error group for positioning - Google Patents

Abstract

The present invention relates to a method for transmitting transmission time error group information for a terminal for location measurement. According to the present invention, provided is a method of processing a control signal, which includes the steps of: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to a base station. Accordingly, the information which the terminal needs to transmit can only be transmitted based on the existing transmission information, and thus the size of data which the terminal needs to transmit can be reduced.

Description

UE transmission timing error group information transmission method for location measurement {APPARATUS and method for reporting information on UE transmission timing error group for positioning}

The present disclosure relates to a wireless communication system, and more specifically, to a method and apparatus for reporting UE transmission timing error group (TEG) related information for location measurement.

5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and includes sub-6 GHz ('Sub 6GHz') bands such as 3.5 gigahertz (3.5 GHz) as well as millimeter wave (mm) bands such as 28 GHz and 39 GHz. It is also possible to implement it in the ultra-high frequency band ('Above 6GHz') called Wave. In addition, in the case of 6G mobile communication technology, which is called the system of Beyond 5G, Terra is working to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low delay time that is reduced to one-tenth. Implementation in Terahertz bands (e.g., 95 GHz to 3 THz) is being considered.

In the early days of 5G mobile communication technology, there were concerns about ultra-wideband services (enhanced Mobile BroadBand, eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC). With the goal of satisfying service support and performance requirements, efficient use of ultra-high frequency resources, including beamforming and massive array multiple input/output (Massive MIMO) to alleviate radio wave path loss in ultra-high frequency bands and increase radio transmission distance. Various numerology support (multiple subcarrier interval operation, etc.) and dynamic operation of slot format, initial access technology to support multi-beam transmission and broadband, definition and operation of BWP (Band-Width Part), large capacity New channel coding methods such as LDPC (Low Density Parity Check) codes for data transmission and Polar Code for highly reliable transmission of control information, L2 pre-processing, and dedicated services specialized for specific services. Standardization of network slicing, etc., which provides networks, has been carried out.

Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology, considering the services that 5G mobile communication technology was intended to support, based on the vehicle's own location and status information. V2X (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience, and NR-U (New Radio Unlicensed), which aims to operate a system that meets various regulatory requirements in unlicensed bands. ), NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with the terrestrial network is impossible, positioning, etc. Physical layer standardization for technology is in progress.

In addition, IAB (IAB) provides a node for expanding the network service area by integrating intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, and wireless backhaul links and access links. Integrated Access and Backhaul, Mobility Enhancement including Conditional Handover and DAPS (Dual Active Protocol Stack) handover, and 2-step Random Access (2-step RACH for simplification of random access procedures) Standardization in the field of wireless interface architecture/protocol for technologies such as NR) is also in progress, and 5G baseline for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technology Standardization in the field of system architecture/services for architecture (e.g., Service based Architecture, Service based Interface) and Mobile Edge Computing (MEC), which provides services based on the location of the terminal, is also in progress.

When this 5G mobile communication system is commercialized, an explosive increase in connected devices will be connected to the communication network. Accordingly, it is expected that strengthening the functions and performance of the 5G mobile communication system and integrated operation of connected devices will be necessary. To this end, eXtended Reality (XR) and Artificial Intelligence are designed to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR). , AI) and machine learning (ML), new research will be conducted on 5G performance improvement and complexity reduction, AI service support, metaverse service support, and drone communication.

In addition, the development of these 5G mobile communication systems includes new waveforms, full dimensional MIMO (FD-MIMO), and array antennas to ensure coverage in the terahertz band of 6G mobile communication technology. , multi-antenna transmission technology such as Large Scale Antenna, metamaterial-based lens and antenna to improve coverage of terahertz band signals, high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum), RIS ( In addition to Reconfigurable Intelligent Surface technology, Full Duplex technology, satellite, and AI (Artificial Intelligence) to improve the frequency efficiency of 6G mobile communication technology and system network are utilized from the design stage and end-to-end. -to-End) Development of AI-based communication technology that realizes system optimization by internalizing AI support functions, and next-generation distributed computing technology that realizes services of complexity beyond the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could be the basis for .

According to the prior art, whenever the terminal receives a sounding reference signal (SRS) for location measurement from the network, and whenever the mapping of the internal transmission antenna and SRS resources changes, all SRS resource mapping information of all timing error groups must be transmitted. However, in this case, there is a disadvantage in that it consumes a lot of data for information transmission.

The disclosed embodiment seeks to provide an apparatus and method that can effectively provide services in a mobile communication system.

This disclosure proposes a method for transmitting timing error group information for transmission from a terminal among related information for location measurement.

In order to solve the above problems, the present disclosure provides a control signal processing method in a wireless communication system, comprising: receiving a first control signal transmitted from a base station; processing the received first control signal; And transmitting a second control signal generated based on the processing to the base station.

According to an embodiment of the present disclosure, when transmitting a positioning SRS signal from a network, the terminal may report the structure of transmission timing error information within the terminal in a manner that allows addition/modification/removal from existing reported information.

In addition, according to an embodiment of the present disclosure, the terminal can transmit only information that has changed based on existing transmission information, thereby reducing the size of data that the terminal must transmit.

Figure 1 is a diagram showing the structure of an LTE system according to an embodiment of the present disclosure.
Figure 2 is a diagram showing the wireless protocol structure of an LTE system according to an embodiment of the present disclosure.
Figure 3 is a diagram showing the structure of a next-generation mobile communication system according to an embodiment of the present disclosure.
Figure 4 is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to an embodiment of the present disclosure.
Figure 5 is a block diagram showing the internal structure of a terminal according to an embodiment of the present disclosure.
Figure 6 is a block diagram showing the configuration of a base station according to an embodiment of the present disclosure.
Figure 7 is a flowchart of terminal reporting and use of the information according to an embodiment of the present disclosure.
Figure 8 is an example showing the Abstract Syntax Notation one (ASN.1) structure according to an embodiment of the present disclosure.
Figure 9 is an example showing the ASN.1 structure according to an embodiment of the present disclosure.
Figure 10 is an example showing the ASN.1 structure according to an embodiment of the present disclosure.

Hereinafter, the operating principle of the present disclosure will be described in detail with reference to the attached drawings. In the following description of the present disclosure, if a detailed description of a related known function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of the functions in the present disclosure, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Terms used in the following description to identify a connection node, a term referring to network entities, a term referring to messages, a term referring to an interface between network objects, and a term referring to various types of identification information. The following are examples for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described after this disclosure, and other terms referring to objects having equivalent technical meaning may be used.

For convenience of description below, the present disclosure uses terms and names defined in the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) standard. However, the present disclosure is not limited by the above terms and names, and can be equally applied to systems complying with other standards.

The advantages and features of the present disclosure and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, and the present embodiments are merely intended to ensure that the disclosure is complete and to provide common knowledge in the technical field to which the present disclosure pertains. It is provided to fully inform those who have the scope of the invention, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

At this time, it will be understood that each block of the processing flow diagrams and combinations of the flow diagram diagrams can be performed by computer program instructions. These computer program instructions can be mounted on a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment, so that the instructions performed through the processor of the computer or other programmable data processing equipment are described in the flow chart block(s). It creates the means to perform functions. These computer program instructions may also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular manner, so that the computer-usable or computer-readable memory It is also possible to produce manufactured items containing instruction means that perform the functions described in the flowchart block(s). Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer, thereby generating a process that is executed by the computer or other programmable data processing equipment. Instructions that perform processing equipment may also provide steps for executing the functions described in the flow diagram block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). Additionally, it should be noted that in some alternative execution examples it is possible for the functions mentioned in the blocks to occur out of order. For example, it is possible for two blocks shown in succession to be performed substantially simultaneously, or it is possible for the blocks to be performed in reverse order depending on the corresponding function.

At this time, the term '~unit' used in this embodiment refers to software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and '~unit' performs certain roles. do. However, '~part' is not limited to software or hardware. The '~ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, '~ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'. Additionally, components and 'parts' may be implemented to regenerate one or more CPUs within a device or a secure multimedia card. Additionally, in an embodiment, '~ part' may include one or more processors.

In the following description of the present disclosure, if a detailed description of a related known function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings.

Terms used in the following description to identify a connection node, a term referring to network entities, a term referring to messages, a term referring to an interface between network objects, and a term referring to various types of identification information. The following are examples for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meaning may be used. For example, in the following description, the terminal may refer to a MAC entity within the terminal that exists for each Master Cell Group (MCG) and Secondary Cell Group (SCG), which will be described later.

For convenience of description below, the present disclosure uses terms and names defined in the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) standard. However, the present disclosure is not limited by the above terms and names, and can be equally applied to systems complying with other standards.

Hereinafter, the base station is the entity that performs resource allocation for the terminal and may be at least one of gNode B, eNode B, Node B, BS (Base Station), wireless access unit, base station controller, or node on the network. A terminal may include a UE (User Equipment), MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions. Of course, it is not limited to the above examples.

In particular, the present disclosure is applicable to 3GPP NR (5th generation mobile communication standard). In addition, this disclosure provides intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security and safety-related services) based on 5G communication technology and IoT-related technology. etc.) can be applied. In the present invention, eNB may be used interchangeably with gNB for convenience of explanation. That is, a base station described as an eNB may represent a gNB. Additionally, the term terminal can refer to mobile phones, NB-IoT devices, sensors, as well as other wireless communication devices.

Wireless communication systems have moved away from providing early voice-oriented services to, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), and LTE-Advanced. Broadband wireless that provides high-speed, high-quality packet data services such as communication standards such as (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), UMB (Ultra Mobile Broadband), and IEEE's 802.16e. It is evolving into a communication system.

As a representative example of a broadband wireless communication system, the LTE system uses Orthogonal Frequency Division Multiplexing (OFDM) in the downlink (DL), and Single Carrier Frequency Division Multiple Access (SC-FDMA) in the uplink (UL). ) method is adopted. Uplink refers to a wireless link in which a terminal (UE; User Equipment or MS; Mobile Station) transmits data or control signals to a base station (eNode B or BS; Base Station), and downlink refers to a wireless link in which the base station transmits data or control signals to the terminal. It refers to a wireless link that transmits signals. The multiple access method described above differentiates each user's data or control information by allocating and operating the time-frequency resources to carry data or control information for each user so that they do not overlap, that is, orthogonality is established. .

As a future communication system after LTE, that is, the 5G communication system must be able to freely reflect the various requirements of users and service providers, so services that simultaneously satisfy various requirements must be supported. Services considered for the 5G communication system include Enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC). There is.

According to some embodiments, eMBB may aim to provide more improved data transmission rates than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a peak data rate of 20Gbps in the downlink and 10Gbps in the uplink from the perspective of one base station. In addition, the 5G communication system may need to provide the maximum transmission rate and at the same time provide an increased user perceived data rate. In order to meet these requirements, the 5G communication system may require improvements in various transmission and reception technologies, including more advanced multi-antenna (MIMO; Multi Input Multi Output) transmission technology. In addition, while the current LTE transmits signals using a maximum of 20 MHz transmission bandwidth in the 2 GHz band, the 5G communication system uses a frequency bandwidth wider than 20 MHz in the 3 to 6 GHz or above 6 GHz frequency band, meeting the requirements of the 5G communication system. Data transfer speed can be satisfied.

At the same time, mMTC is being considered to support application services such as Internet of Things (IoT) in 5G communication systems. In order to efficiently provide the Internet of Things, mMTC may require support for access to a large number of terminals within a cell, improved coverage of terminals, improved battery time, and reduced terminal costs. Since the Internet of Things provides communication functions by attaching various sensors and various devices, it must be able to support a large number of terminals (for example, 1,000,000 terminals/km2) within a cell. Additionally, due to the nature of the service, terminals supporting mMTC are likely to be located in shadow areas that cannot be covered by cells, such as the basement of a building, so wider coverage may be required compared to other services provided by the 5G communication system. Terminals that support mMTC must be composed of low-cost terminals, and since it is difficult to frequently replace the terminal's battery, a very long battery life time, such as 10 to 15 years, may be required.

Lastly, in the case of URLLC, it is a cellular-based wireless communication service used for specific purposes (mission-critical), such as remote control of robots or machinery, industrial automation, It can be used for services such as unmanned aerial vehicles, remote health care, and emergency alerts. Therefore, the communication provided by URLLC may need to provide very low latency (ultra-low latency) and very high reliability (ultra-reliability). For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds and may have a packet error rate of less than 10-5. Therefore, for services supporting URLLC, the 5G system must provide a smaller Transmit Time Interval (TTI) than other services, and at the same time, a design that requires allocating wide resources in the frequency band to ensure the reliability of the communication link. Specifications may be required.

The three services considered in the above-described 5G communication system, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. At this time, different transmission/reception techniques and transmission/reception parameters can be used between services to satisfy the different requirements of each service. However, the above-described mMTC, URLLC, and eMBB are only examples of different service types, and the service types to which this disclosure is applied are not limited to the above-described examples.

In addition, hereinafter, embodiments of the present invention will be described using LTE, LTE-A, LTE Pro or 5G (or NR, next-generation mobile communication) systems as examples, but the present invention can also be applied to other communication systems with similar technical background or channel type. Examples of may be applied. In addition, the embodiments of the present invention may be applied to other communication systems through some modifications without significantly departing from the scope of the present invention at the discretion of a person with skilled technical knowledge.

Figure 1 is a diagram showing the structure of an LTE system according to an embodiment of the present disclosure.

Referring to FIG. 1, as shown, the wireless access network of the LTE system includes a next-generation base station (Evolved Node B, hereinafter referred to as ENB, Node B or base station) (1-05, 1-10, 1-15, 1-20) and It may be composed of a Mobility Management Entity (MME) (1-25) and S-GW (1-30, Serving-Gateway). User equipment (hereinafter referred to as UE or terminal) (1-35) can access an external network through ENB (1-05 to 1-20) and S-GW (1-30).

In FIG. 1, ENBs 1-05 to 1-20 may correspond to the existing Node B of the UMTS system. The ENB is connected to the UE (1-35) through a wireless channel and can perform a more complex role than the existing Node B. In the LTE system, all user traffic, including real-time services such as VoIP (Voice over IP) through the Internet protocol, can be serviced through a shared channel. Therefore, a device that collects status information such as buffer status, available transmission power status, and channel status of UEs and performs scheduling may be needed, and the ENB (1-05 to 1-20) may be responsible for this. One ENB can typically control multiple cells. For example, in order to implement a transmission speed of 100 Mbps, the LTE system can use Orthogonal Frequency Division Multiplexing (OFDM) as a wireless access technology in, for example, a 20 MHz bandwidth. Additionally, the ENB can apply the Adaptive Modulation & Coding (AMC) method, which determines the modulation scheme and channel coding rate according to the channel status of the terminal. The S-GW (1-30) is a device that provides data bearers, and can create or remove data bearers under the control of the MME (1-25). The MME is a device that handles various control functions as well as mobility management functions for the terminal and can be connected to multiple base stations.

Figure 2 is a diagram showing the wireless protocol structure of an LTE system according to an embodiment of the present disclosure.

Referring to Figure 2, the wireless protocols of the LTE system are Packet Data Convergence Protocol (PDCP) (2-05, 2-40) and Radio Link Control (RLC) (Radio Link Control, RLC) in the terminal and ENB, respectively. 2-10, 2-35), and Medium Access Control (MAC) (2-15, 2-30). PDCP can be responsible for operations such as IP header compression/restoration. The main functions of PDCP can be summarized as follows. Of course, it is not limited to the examples below.

- Header compression and decompression (ROHC only)

- Transfer of user data

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

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

- Duplicate detection of lower layer SDUs at PDCP re-establishment procedure for RLC AM

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

- Encryption and decryption function (Ciphering and deciphering)

- Timer-based SDU discard in uplink.

According to some embodiments, Radio Link Control (RLC) (2-10, 2-35) can perform ARQ operations, etc. by reconfiguring the PDCP Packet Data Unit (PDU) to an appropriate size. There is.. The main functions of RLC can be summarized as follows. Of course, it is not limited to the examples below.

- Data transfer function (Transfer of upper layer PDUs)

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

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

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

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

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

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

- RLC SDU deletion function (RLC SDU discard (only for UM and AM data transfer))

- RLC re-establishment function

According to some embodiments, MAC (2-15, 2-30) is connected to several RLC layer devices configured in one terminal, and performs an operation of multiplexing RLC PDUs to MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. can do. The main functions of MAC can be summarized as follows. Of course, this is not limited to the examples below.

- Mapping function (Mapping between logical channels and transport channels)

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

- Scheduling information reporting

- HARQ function (Error correction through HARQ)

- Priority handling between logical channels of one UE

- Priority handling between UEs by means of dynamic scheduling

- MBMS service identification function

- Transport format selection function

- Padding function

According to some embodiments, the physical layer (2-20, 2-25) channel-codes and modulates upper layer data, creates OFDM symbols and transmits them over a wireless channel, or demodulates OFDM symbols received through a wireless channel and transmits them to the channel. You can decode and transmit it to the upper layer. Of course, this is not limited to the examples below.

Figure 3 is a diagram showing the structure of a next-generation mobile communication system according to an embodiment of the present disclosure.

Referring to Figure 3, the radio access network of the next-generation mobile communication system (hereinafter referred to as NR or 5g) includes a next-generation base station (New Radio Node B, hereinafter referred to as NR gNB or NR base station) (3-10) and a next-generation wireless core network (New Radio Core). Network, NR CN) (3-05). The next-generation wireless user equipment (New Radio User Equipment, NR UE or UE) (3-15) can access an external network through NR gNB (3-10) and NR CN (3-05).

In Figure 3, NR gNB (3-10) may correspond to an eNB (Evolved Node B) of the existing LTE system. NR gNB is connected to NR UE (3-15) through a wireless channel and can provide superior services than the existing Node B. In the next-generation mobile communication system, all user traffic can be serviced through a shared channel. Therefore, a device may be needed to perform scheduling by collecting status information such as buffer status, available transmission power status, and channel status of UEs, and the NR NB 3-10 may be responsible for this. One NR gNB can control multiple cells. In the next-generation mobile communication system, in order to implement ultra-fast data transmission compared to the current LTE, a bandwidth exceeding the current maximum bandwidth may be applied. Additionally, beamforming technology may be additionally used using Orthogonal Frequency Division Multiplexing (OFDM) as a wireless access technology.

In addition, according to some embodiments, the NR gNB uses an Adaptive Modulation & Coding (AMC) method that determines the modulation scheme and channel coding rate according to the channel status of the terminal. This can be applied. NR CN (3-05) can perform functions such as mobility support, bearer setup, and QoS setup. NR CN (3-05) is a device responsible for various control functions as well as mobility management functions for the terminal and can be connected to multiple base stations. Additionally, the next-generation mobile communication system can be linked to the existing LTE system, and NR CN can be connected to MME (3-25) through a network interface. The MME can be connected to an existing base station, eNB (3-30).

Figure 4 is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to an embodiment of the present disclosure.

Referring to FIG. 4, the wireless protocols of the next-generation mobile communication system are NR Service Data Adaptation Protocol (SDAP) (4-01, 4-45) and NR PDCP (4-05, 4-05) in the terminal and NR base station, respectively. 4-40), NR RLC (4-10, 4-35), and NR MAC (4-15, 4-30).

According to some embodiments, the main functions of NR SDAP (4-01, 4-45) may include some of the following functions. However, it is not limited to the examples below.

- Transfer of user plane data

- Mapping function of QoS flow and data bearer for uplink and downlink (mapping between a QoS flow and a DRB for both DL and UL)

- Marking QoS flow ID in both DL and UL packets for uplink and downlink

- A function to map the relective QoS flow to the data bearer for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

For SDAP layer devices, the terminal uses a Radio Resource Control (RRC) message to determine whether to use the header of the SDAP layer device for each PDCP layer device, for each bearer, or for each logical channel, or whether to use the function of the SDAP layer device. can be set. In addition, when the SDAP layer device has an SDAP header set, the terminal sets a 1-bit indicator (NAS reflective QoS) reflecting the Non-Access Stratum (NAS) QoS (Quality of Service) of the SDAP header and the access layer (Access Stratum). Stratum, AS) QoS reflection setting 1-bit indicator (AS reflective QoS) can indicate that the terminal can update or reset mapping information for uplink and downlink QoS flows and data bearers. According to some embodiments, the SDAP header may include QoS flow ID information indicating QoS. According to some implementations, QoS information can be used as data processing priority, scheduling information, etc. to support smooth service.

According to some embodiments, the main functions of NR PDCP (4-05, 4-40) may include some of the following functions. However, it is not limited to the examples below.

- Header compression and decompression (ROHC only)

- Transfer of user data

- In-sequence delivery of upper layer PDUs

- Out-of-sequence delivery of upper layer PDUs

- Order reordering function (PDCP PDU reordering for reception)

- Duplicate detection of lower layer SDUs

- Retransmission of PDCP SDUs

- Encryption and decryption function (Ciphering and deciphering)

- Timer-based SDU discard in uplink.

In the above description, the reordering function of the NR PDCP device may mean the function of reordering PDCP PDUs received from the lower layer in order based on PDCP sequence number (SN). The reordering function of the NR PDCP device may include a function of delivering data to a higher layer in the reordered order, or may include a function of directly delivering data without considering the order, and may include a function of transmitting data directly without considering the order, and reordering the data may cause loss. It may include a function to record lost PDCP PDUs, it may include a function to report the status of lost PDCP PDUs to the transmitter, and it may include a function to request retransmission of lost PDCP PDUs. there is.

According to some embodiments, the main functions of NR RLC (4-10, 4-35) may include some of the following functions. However, it is not limited to the examples below.

- Data transfer function (Transfer of upper layer PDUs)

- In-sequence delivery of upper layer PDUs

- Out-of-sequence delivery of upper layer PDUs

- ARQ function (Error Correction through ARQ)

- Concatenation, segmentation and reassembly of RLC SDUs

- Re-segmentation of RLC data PDUs

- Reordering of RLC data PDUs

- Duplicate detection function

- Protocol error detection

- RLC SDU deletion function (RLC SDU discard)

- RLC re-establishment function

In the above description, the in-sequence delivery function of the NR RLC device may mean the function of delivering RLC SDUs received from the lower layer to the upper layer in order. When one RLC SDU is originally received by being divided into multiple RLC SDUs, the in-sequence delivery function of the NR RLC device may include the function of reassembling and delivering it.

The in-sequence delivery function of the NR RLC device may include a function to rearrange the received RLC PDUs based on the RLC SN (sequence number) or PDCP SN (sequence number), and rearrange the order to prevent loss. It may include a function to record lost RLC PDUs, it may include a function to report the status of lost RLC PDUs to the transmitting side, and it may include a function to request retransmission of lost RLC PDUs. there is.

The in-sequence delivery function of the NR RLC device may include a function of delivering only the RLC SDUs up to the lost RLC SDU in order when there is a lost RLC SDU to the upper layer.

The in-sequence delivery function of the NR RLC device may include a function of delivering all RLC SDUs received before the timer starts to the upper layer in order if a predetermined timer expires even if there are lost RLC SDUs. there is.

The in-sequence delivery function of the NR RLC device may include a function of delivering all RLC SDUs received to date to the upper layer in order if a predetermined timer expires even if there are lost RLC SDUs.

The NR RLC device can process RLC PDUs in the order they are received and deliver them to the NR PDCP device, regardless of the order of the sequence number (out-of sequence delivery).

When the NR RLC device receives a segment, it can receive segments stored in a buffer or to be received later, reconstruct them into one complete RLC PDU, and then transmit it to the NR PDCP device.

The NR RLC layer may not include a concatenation function, and may perform the function in the NR MAC layer or replace it with the multiplexing function of the NR MAC layer.

In the above description, the out-of-sequence delivery function of the NR RLC device may refer to the function of directly delivering RLC SDUs received from a lower layer to the upper layer regardless of their order. The out-of-sequence delivery function of the NR RLC device may include a function of reassembling and delivering when one RLC SDU is originally received by being divided into several RLC SDUs. The out-of-sequence delivery function of the NR RLC device may include a function of storing the RLC SN or PDCP SN of received RLC PDUs, sorting the order, and recording lost RLC PDUs.

According to some embodiments, the NR MAC (4-15, 4-30) may be connected to multiple NR RLC layer devices configured in one terminal, and the main functions of the NR MAC may include some of the following functions. . However, it is not limited to the examples below.

- Mapping function (Mapping between logical channels and transport channels)

- Multiplexing and demultiplexing function (Multiplexing/demultiplexing of MAC SDUs)

- Scheduling information reporting

- HARQ function (Error correction through HARQ)

- Priority handling between logical channels of one UE

- Priority handling between UEs by means of dynamic scheduling

- MBMS service identification function

- Transport format selection function

- Padding function

The NR PHY layer (4-20, 4-25) channel-codes and modulates the upper layer data, creates OFDM symbols and transmits them to the wireless channel, or demodulates and channel decodes the OFDM symbols received through the wireless channel and transmits them to the upper layer. The transfer operation can be performed.

Figure 5 is a block diagram showing the internal structure of a terminal according to an embodiment of the present disclosure.

Referring to Figure 5, the terminal may include an RF (Radio Frequency) processing unit 5-10, a baseband processing unit 5-20, a storage unit 5-30, and a control unit 5-40. there is. Of course, it is not limited to the above example, and the terminal may include fewer or more components than those shown in FIG. 5.

The RF processing unit 5-10 can perform functions for transmitting and receiving signals through a wireless channel, such as band conversion and amplification of signals. That is, the RF processing unit 5-10 up-converts the baseband signal provided from the baseband processing unit 5-20 into an RF band signal and transmits it through an antenna, and converts the RF band signal received through the antenna into a baseband signal. It can be down-converted into a signal. For example, the RF processing unit 5-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), etc. there is. Of course, it is not limited to the above examples. In FIG. 5, only one antenna is shown, but the terminal may be equipped with multiple antennas. Additionally, the RF processing unit 5-10 may include a plurality of RF chains. Additionally, the RF processing unit 5-10 can perform beamforming. For beamforming, the RF processing unit 5-10 can adjust the phase and size of each signal transmitted and received through a plurality of antennas or antenna elements. Additionally, the RF processing unit 5-10 can perform MIMO (Multi Input Multi Output) and can receive multiple layers when performing a MIMO operation.

The baseband processing unit 5-20 performs a conversion function between baseband signals and bit strings according to the physical layer specifications of the system. For example, when transmitting data, the baseband processing unit 5-20 generates complex symbols by encoding and modulating the transmission bit string. Additionally, when receiving data, the baseband processing unit 5-20 can restore the received bit stream by demodulating and decoding the baseband signal provided from the RF processing unit 5-10. For example, when following the OFDM (orthogonal frequency division multiplexing) method, when transmitting data, the baseband processing unit 5-20 generates complex symbols by encoding and modulating the transmission bit string, and maps the complex symbols to subcarriers. Afterwards, OFDM symbols are configured through IFFT (inverse fast Fourier transform) operation and CP (cyclic prefix) insertion. In addition, when receiving data, the baseband processing unit 5-20 divides the baseband signal provided from the RF processing unit 5-10 into OFDM symbol units, and signals mapped to subcarriers through FFT (fast Fourier transform). After restoring the received bit string, the received bit string can be restored through demodulation and decoding.

The baseband processing unit 5-20 and the RF processing unit 5-10 transmit and receive signals as described above. The baseband processing unit 5-20 and the RF processing unit 5-10 may be referred to as a transmitting unit, a receiving unit, a transceiving unit, or a communication unit. Furthermore, at least one of the baseband processing unit 5-20 and the RF processing unit 5-10 may include a plurality of communication modules to support a plurality of different wireless access technologies. Additionally, at least one of the baseband processing unit 5-20 and the RF processing unit 5-10 may include different communication modules to process signals in different frequency bands. For example, different wireless access technologies may include wireless LAN (eg, IEEE 802.11), cellular network (eg, LTE), etc. Additionally, the different frequency bands may include a super high frequency (SHF) (e.g., 2.NRHz, NRhz) band and a millimeter wave (e.g., 60GHz) band. The terminal can transmit and receive signals with the base station using the baseband processing unit 5-20 and the RF processing unit 5-10, and the signals may include control information and data.

The storage unit 5-30 stores data such as basic programs, application programs, and setting information for operation of the terminal. In particular, the storage unit 5-30 may store information related to a second access node that performs wireless communication using a second wireless access technology. Additionally, the storage unit 5-30 provides stored data upon request from the control unit 5-40. The storage unit 5-30 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, the storage unit 5-30 may be composed of a plurality of memories.

The control unit 5-40 controls the overall operations of the terminal. For example, the control unit 5-40 transmits and receives signals through the baseband processing unit 5-20 and the RF processing unit 5-10. Additionally, the control unit 5-40 writes and reads data into the storage unit 5-40. For this purpose, the control unit 5-40 may include at least one processor. For example, the control unit 5-40 may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. Additionally, at least one component within the terminal may be implemented with one chip.

Figure 6 is a block diagram showing the configuration of a base station according to an embodiment of the present disclosure.

Referring to FIG. 6, the base station may include an RF processing unit 6-10, a baseband processing unit 6-20, a backhaul communication unit 6-30, a storage unit 6-40, and a control unit 6-50. You can. Of course, it is not limited to the above example, and the base station may include fewer or more configurations than the configuration shown in FIG. 6.

The RF processing unit 6-10 can perform functions for transmitting and receiving signals through a wireless channel, such as band conversion and amplification of signals. That is, the RF processing unit 6-10 upconverts the baseband signal provided from the baseband processing unit 6-20 into an RF band signal and transmits it through an antenna, and converts the RF band signal received through the antenna into a baseband signal. Downconvert it to a signal. For example, the RF processing unit 6-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. In Figure 6, only one antenna is shown, but the RF processing unit 6-10 may be equipped with a plurality of antennas. Additionally, the RF processing unit 6-10 may include a plurality of RF chains. Additionally, the RF processing unit 6-10 can perform beamforming. For beamforming, the RF processing unit 6-10 can adjust the phase and size of each signal transmitted and received through a plurality of antennas or antenna elements. The RF processing unit can perform downward MIMO operation by transmitting one or more layers.

The baseband processing unit 6-20 can perform a conversion function between baseband signals and bit strings according to the physical layer standard of the first wireless access technology. For example, when transmitting data, the baseband processing unit 6-20 may generate complex symbols by encoding and modulating the transmission bit stream. Additionally, when receiving data, the baseband processing unit 6-20 can restore the received bit stream by demodulating and decoding the baseband signal provided from the RF processing unit 6-10. For example, when following the OFDM method, when transmitting data, the baseband processing unit 6-20 generates complex symbols by encoding and modulating the transmission bit string, maps the complex symbols to subcarriers, and performs IFFT operation and OFDM symbols are configured through CP insertion. In addition, when receiving data, the baseband processing unit 6-20 divides the baseband signal provided from the RF processing unit 6-10 into OFDM symbols, restores the signals mapped to subcarriers through FFT operation, and then , the received bit string can be restored through demodulation and decoding. The baseband processing unit 6-20 and the RF processing unit 6-10 can transmit and receive signals as described above. Accordingly, the baseband processing unit 6-20 and the RF processing unit 6-10 may be referred to as a transmitting unit, a receiving unit, a transceiving unit, a communication unit, or a wireless communication unit. The base station can transmit and receive signals with the terminal using the baseband processing unit 6-20 and the RF processing unit 6-10, and the signals can include control information and data.

The backhaul communication unit 6-30 provides an interface for communicating with other nodes in the network. In other words, the backhaul communication unit 6-30 converts a bit string transmitted from the main base station to another node, for example, an auxiliary base station, a core network, etc., into a physical signal, and converts a physical signal received from another node into a bit string. can do. The backhaul communication unit 6-30 may be included in the communication unit.

The storage unit 6-40 stores data such as basic programs, application programs, and setting information for operation of the base station. The storage unit 6-40 can store information about bearers assigned to the connected terminal, measurement results reported from the connected terminal, etc. Additionally, the storage unit 6-40 may store information that serves as a criterion for determining whether to provide or suspend multiple connections to the terminal. Additionally, the storage unit 6-40 provides stored data upon request from the control unit 6-50. The storage unit 6-40 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, the storage unit 6-40 may be composed of a plurality of memories. According to some embodiments, the storage unit 6-40 may store a program for performing the buffer status reporting method according to the present disclosure.

The control unit 6-50 controls the overall operations of the base station. For example, the control unit 6-50 transmits and receives signals through the baseband processing unit 6-20 and the RF processing unit 6-10 or through the backhaul communication unit 6-30. Additionally, the control unit 6-50 writes and reads data into the storage unit 6-40. For this purpose, the control unit 6-50 may include at least one processor. Additionally, at least one component of the base station may be implemented with one chip.

Figure 7 is a flowchart of terminal reporting and use of the information according to an embodiment of the present disclosure.

Through the embodiment described in FIG. 7, LMF (location management function) can measure the location of the target terminal. The description of each flow is as follows.

0. The LMF can obtain TRP information for UL-TDOA (uplink time difference of arrival) location measurement from the serving gNB and nearby TRPs.

For example, the LMF may transmit a NRPa (NR positioning protocol A) TRP INFORMATION REQUEST message to gNB(/TRP). The request message may include information indicating which TRP information the LMF is requesting. The gNB(/TRP) that has received the request message can transmit the requested TRP information to the LMF by including it in the NRPPa TRP INFORMATION RESPONSE message. If the gNB cannot provide TRP information, it may transmit a TRP INFORMATION FAILURE message indicating failure.

One. LMF can request the positioning capabilities of the target device using the LPP (LTE positioning protocol) Capability Transfer procedure.

2. To request UL (uplink)-SRS (sounding reference signal) configuration information for the target device, the LMF may transmit an NR positioning protocol A (NRPa) POSITIONING INFORMATION REQUEST message to the serving gNB (/TRP).

3. Serving gNB (TRP) can determine available resources (or resource sets) for UL-SRS. In step 3a, Serving gNB (TRP) can set UL-SRS resources (or resource set) to the target device. In step 3b, the Serving gNB (TRP) may request UE TxTEG (Tx (transmission) timing error group) association information from the target device and receive UE TxTEG association information from the target device. For example, the UE may periodically report UE TxTEG association information to the gNB(/TRP), and in this case, the UE TxTEG association information may include all changes in UE TxTEG during the reporting period. As another example, the target device may report UE TxTEG related information including all UE TxTEGs at the timing at which the gNB(/TRP) request was received in a one-shot manner. For example, the message exchange in step 3b may be delivered through RRC signaling.

4. Serving gNB(/TRP) can provide UL information to LMF. The UL information may be included in the NRPPa POSITIONING INFORMATION RESPONSE message.

5. In the case of semi-persistent SRS or aperiodic SRS, the LMF can request activation of UL SRS transmission by sending an NRPPa Positioning Activation Request message to the serving gNB (/TRP) of the target device. For example, in the case of semi-persistent SRS, the message may include an indication of a set of UL-SRS resources to be activated and may include information indicating a spatial relation for the semi-persistent UL-SRS resources to be activated. For example, in the case of aperiodic SRS, the message may include an aperiodic SRS resource trigger list indicating UL-SRS resources to be activated. GNB(/TRP) activates UL-SRS transmission and, if UL-SRS is successfully activated, can transmit an NRPPa Positioning Activation Response message to LMF. The target device can start UL-SRS transmission according to the time domain behavior of UL-SRS resource configuration.

6. LMF can provide UL-SRS configuration to selected gNBs. The UL-SRS configuration may be included in the NRPPa MEASUREMENT REQUEST message. The message may contain all information necessary to enable gNBs/TRPs to perform UL measurements. For example, the measurement request message may include at least one of the information in Table 1.

7. Each gNB(/TRP) configured in step 6 can measure UL-SRS transmission (e.g., UL-TDOA measurement) from the target device.

8. Each gNB(/TRP) can report UL-SRS measurement results to the LMF. For example, the UL-SRS measurement result may be included in the NRPPa Measurement Response message and transmitted to the LMF. For example, the UL-SRS measurement result may include at least one of the information in Table 2.

9. The LMF can transmit the NRPPa POSITIONING DEACTIVATION message to the serving gNB(/TRP).

Specifically, the UE TxTEG association information transmitted in step 3b indicates the association between TEG and SRS. Considering the delay between the time when the UL SRS transmitted from the UE is created at the baseband level and the time when the signal is transmitted through the RF / antenna, if each configured UL SRS resource is transmitted through a specific RF / antenna, the UL Depending on the RF/antenna allocated to each SRS, timing delay may be different. TEG is a timing error group, which means a resource group among the UL SRSs whose timing delay is similar within a certain margin value, and this can be determined by the terminal according to the terminal's implementation. That is, the UL SRS associated with one TEG can perform UL TDOA-related measurements assuming that the transmission time is similar or the same in the TRP/gNB receiving it.

In one embodiment, when the Tx TEG association information is delivered to the LMF, the LMF may deliver a message requesting measurement of UL SRS resources included in the same TEG to the gNB/TRP, etc. in step 6. By measuring the requested UL SRS resources, gNB/TRPs can reduce location measurement errors due to differences in transmission times between UL SRSs based on this.

In Step 3a, when the serving gNB(/TRP) delivers SRS configuration information to the target device, the reporting format of UE TxTEG information can be set in the RRCReconfiguration message containing the SRS configuration information. The target device or terminal that receives this setting can report UE TxTEG information to serving gNB(/TRP). This report may be reported as an RRC message. For example, when the Serving gNB(/TRP) sets the reporting format for UE TxTEG information, it may request one-shot reporting or periodic reporting. If a one-time report is requested, the target device can report UE TxTEG related information including all UE TxTEGs at the time the configuration information was received (e.g., the timing when the request from gNB(/TRP) was received). If periodic reporting is requested, UE TxTEG related information including all changes in UE TxTEG during the reporting period can be reported based on the periodic value included in the setting.

In the examples below, the TEG and UL SRS mapping information may be a TEG ID-specific list of information that maps UL SRS resources to specific TEG IDs. Additionally, when referring to a UL SRS resource, it may be referred to as a UL SRS resource set ID and a specific resource ID in the resource set. Therefore, three IDs, such as one TEG ID, UL SRS resource set ID, and UL SRS resource ID within that resource set, can configure one UL SRS resource and TEG ID mapping, and one SRS resource is just It can belong to only one SRS resource set and one TEG ID. Instead, one TEG ID or one SRS resource set can be associated with multiple resource IDs.

In one embodiment, when the serving base station requests a periodic report from the terminal, the terminal may report to the base station the mapping information of TEG and UL SRS that are valid or effective up to that point at each reporting time. For this purpose, the mapping information for each TEG and UL SRS can be additionally transmitted along with information on the most recent time when it was valid.

In another embodiment, when a periodic report is requested, at the time of the first report, the terminal may report to the base station the mapping information of the TEG and UL SRS that was valid or effective up to the time of the report and the most recent time information at which the mapping information was valid. . After the initial report, the UE may report additionally including the initially reported TEG and UL SRS mapping information and the TEG and UL SRS mapping information changed from the initially reported information.

In another embodiment, when a periodic report is requested, the content reported by the terminal may be displayed and reported focusing on changes. In other words, it is possible to report changes in previously reported TEG and UL SRS mapping information, that is, a UL SRS resource list to be added or changed compared to the existing one, and a UL SRS resource list to be removed compared to the existing one. In this case, the serving base station or LMF that has received this information can add/change or remove the newly reported UL SRS resource based on the previous report result. This method of displaying changes mainly includes displaying changes to the TEG ID, SRS resource set, and all types of information in the SRS resource, displaying changes to the UL SRS resource set and SRS resource, or displaying changes to the UL SRS resource. A method of displaying changed contents may be possible.

Below, we will describe in detail the method for reporting, focusing on changes from the content reported in the previous cycle.

Opt 1. Among the above cases, when changes are indicated for each of the TEG ID, SRS resource set, and SRS resource, the terminal can report information including the following hierarchy.

▶ List of Add/Mod of TEG ID (1)

■ For each Add/Mod TEG ID, List of Add/Mod of SRS resource set ID (2)

◆ For each Add/Mod SRS resource set ID, List of Add of SRS resource ID (3)

◆ For each Add/Mod SRS resource set ID, List of release of SRS resource ID (4)

■ For each Add/Mod TEG ID, List of release of SRS resource set ID(5)

▶ List of releases of TEG ID (6)

The first information (e.g., List of Add/Mod of TEG ID) refers to a list of TEG IDs in which changed SRS resources exist among the mapping information of previously transmitted TEG and SRS resources. The second information (e.g., List of Add/Mod of SRS resource set ID) refers to a list of SRS resource set IDs in which the changed SRS resource exists. The third information (e.g., List of Add of SRS resource ID) refers to a list of IDs of SRS resources newly included in the corresponding TEG ID among the changed SRS resources. The fourth information (e.g., List of release of SRS resource ID) refers to a list of IDs of SRS resources missing from the corresponding TEG ID among the changed SRS resources. The fifth information (e.g., List of release of SRS resource set ID) refers to a list of specific SRS resource sets that are omitted from the corresponding TEG ID among the changed SRS resources. This information may mean that any SRS resources included in the corresponding missing SRS resource set are collectively removed. Lastly, the sixth information (e.g., List of release of TEG ID) may indicate that a specific predefined TEG ID itself is removed. All SRS resource sets and resources linked within the TEG ID included in the removal list can be indicated as being removed.

Figure 8 is an example showing the ASN.1 (Abstract Syntax Notation one) structure of opt 1.

Opt 2. Among the above cases, the TEG ID is always reported, and when reporting changed information about the SRS resource set and SRS resource associated with the corresponding TEG ID, the terminal can report information including the following hierarchy. .

▶ List of TEG ID (1)

■ For each TEG ID, List of Add/Mod of SRS resource set ID (2)

◆ For each Add/Mod SRS resource set ID, List of Add of SRS resource ID (3)

◆ For each Add/Mod SRS resource set ID, List of release of SRS resource ID (4)

■ For each TEG ID, List of release of SRS resource set ID (5)

The first information (e.g., List of TEG ID) is a list containing all TEG IDs set at the time of reporting. The second information (e.g., List of Add/Mod of SRS resource set ID) refers to a list of SRS resource set IDs containing SRS resources changed from the corresponding TEG ID. For each ID included in this list, third information (e.g., List of Add of SRS resource ID) and/or fourth information (List of release of SRS resource ID) can be configured. The third information refers to the list of SRS resource IDs added to the SRS resource set of the corresponding ID among the changed SRS resources, and the fourth information refers to the list of SRS resource IDs excluded from the SRS resource set of the corresponding ID among the changed SRS resources. You can. The fifth information (e.g., List of release of SRS resource set ID) refers to a list of SRS resource set IDs to be removed from the corresponding TEG ID. This may mean that all predefined SRS resources included in this SRS resource set are removed. In this case, in the case of a specific TEG ID, if there is no changed SRS resource, the corresponding TEG ID field can mean no change through a 1 bit indicator, or any field among SRS resource set or SRS resource is included under the TEG ID. If not, this may mean that the corresponding TEG ID does not have a changed SRS resource.

Figure 9 is an example showing the ASN.1 structure of opt 2.

Opt 3. Among the above cases, the TEG ID and the SRS resource set ID included therein are always reported, and when reporting a changed SRS resource, the terminal reports the SRS resource existing in the SRS resource set ID of a specific TEG ID. You can report change information. In this case, the terminal can report information including the hierarchy below.

▶ List of TEG ID (1)

■ List of SRS resource set ID (2)

◆ For each SRS resource set ID, List of Add of SRS resource ID (3)

◆ For each SRS resource set ID, List of release of SRS resource ID (4)

The first information (e.g., List of TEG ID) is a list containing all TEG IDs set at the time of reporting. The second information (e.g., List of SRS resource set ID) refers to the SRS resource set ID including each resource for all SRS resources associated with the corresponding TEG ID. The third information (e.g., List of Add of SRS resource ID) is an SRS resource ID added to each TEG ID and is included in the SRS resource set ID including it. The fourth information (e.g., List of release of SRS resource ID) is an SRS resource ID removed from each TEG ID and is included in the SRS resource set ID including it. In this method, each TEG ID or SRS resource set ID may include a 1-bit indicator indicating that there is no previously reported information and no changed SRS resource. Alternatively, the SRS resource set ID or SRS resource ID is not included below the TEG ID, which may mean that there are no SRS resources that have changed compared to the previously reported information.

Figure 10 is an example showing the ASN.1 structure of opt 3.

In the examples above, a resource set may not be needed. This case may apply if the resource set has already been mapped to a specific RF of the terminal, or has been mapped to a specific PCI (physical cell ID) or NR ARFCN (Absolute Radio-Frequency Channel Number) frequency information. When mapped to a specific RF, the UE can perform the change-based reporting by considering only the mapping of TEG ID and SRS resource ID. If PCI/ARFCN is considered instead of the resource set, the change-based reporting can be performed by considering the PCI or ARFCN value instead of the resource set ID.

Additionally, a 1 bit indicator indicating that there has been no change in the previously reported TEG and UL SRS resource mapping information may be included in the TEG ID level, as mentioned above, or may be included in the SRS resource set ID level, but in the above report In the UEPositioningAssistanceInformation message, which is an RRC message for, it is located above the TEG ID information and may indicate that there is no overall change regardless of the TEG ID and SRS resource set ID.

Table 3 shows an example of the ASN.1 structure of the UEPositioningAssistanceInformation message.

For example, referring to Table 3, the srs-PosResSetAssociationList-r17 field is set for each TEG ID, when the field is defined as an OPTIONAL field and is transmitted as absent (i.e., the field is not included in the report message). , the corresponding TEG ID may mean that there are no changes compared to the previously transmitted information. In another embodiment, if the UE-TxTEG-AssociationList-r17 field is also absent, this may mean that the content of the corresponding UEPositioningAssistanceInformation message is unchanged compared to the content of the previously transmitted UEPositioningAssistanceInformation message.

In another embodiment, while the currently introduced nr-Time-stamp field is created and reported for each TEG ID, all TEG IDs and UL SRS resource mapping information up to the time of reporting are valid regardless of the specific TEG ID. Reports can include up-to-date time information. To that end, a new time stamp field can be defined and reported as a field located higher than the specific TEG ID. The LMF that receives the new time stamp message can recognize that all TEG and UL SRS resource mapping information configured and reported by the UE up to that time is valid. Based on this, when TRPs measure UL SRS, they can request to measure SRS resources included in the same TEG ID.

Operations performed by the target device/terminal in the method and/or embodiments proposed in this disclosure may be executed by the configuration included in the terminal of FIG. 5 described above. For example, the UE may report UE TxTEG related information including TEG and UL SRS mapping information to the gNB.

Additionally, operations performed by the base station/gNB/TRP in the method and/or embodiments proposed in this disclosure may be performed by the configuration included in the base station of FIG. 6 described above. For example, the base station may receive UE TxTEG related information including TEG and UL SRS mapping information from the terminal and transmit an NRPPa Positioning information response message to the LMF. Additionally, the base station can measure UL-SRS transmitted from the target device (e.g., UL-TDOA measurement).

Additionally, in the method and/or embodiments proposed in this disclosure, the LMF may be a network entity that performs LMF. For example, an LMF (or a network entity that performs LMF) may include a controller and a transceiver. In one example, the controller may be comprised of one or more processors. The controller may control operations performed by the LMF in the method and/or embodiments proposed in this disclosure. For example, the LMF may transmit an NRPPa Positioning information request message to the base station and receive a corresponding response message. For example, the LMF may transmit an NRPPa measurement request message and receive an NRPPa measurement response message containing measurement results from the base station. For example, the LMF may communicate with an Access and Mobility Management Function (AMF) through the transceiver. For example, communication between the LMF and the base station may be accomplished through the AMF.

Meanwhile, in the drawings explaining the method of the present disclosure, the order of explanation does not necessarily correspond to the order of execution, and the order of precedence may be changed or executed in parallel.

Alternatively, the drawings explaining the method of the present disclosure may omit some components and include only some components within the scope that does not impair the essence of the present disclosure.

In addition, the method of the present disclosure may be implemented by combining some or all of the content included in each embodiment within the scope that does not impair the essence of the disclosure.

In addition, although not disclosed in the present disclosure, a method in which a separate table or information including at least one element included in the table proposed in the present disclosure is used is also possible.

Meanwhile, the embodiments of the present disclosure disclosed in the specification and drawings are merely provided as specific examples to easily explain the technical content of the present disclosure and aid understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. In other words, it is obvious to those skilled in the art that other modifications based on the technical idea of the present disclosure can be implemented. Additionally, each of the above embodiments can be operated in combination with each other as needed.

Claims (1)

In a control signal processing method in a wireless communication system,
Receiving a first control signal transmitted from a base station;
processing the received first control signal; and
A control signal processing method comprising transmitting a second control signal generated based on the processing to the base station.

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