KR20220136875A - A method and apparatus for reporting measurement result for positioning in inactive mode and idle mode - Google Patents

Abstract

A method according to an embodiment of the present disclosure includes the steps of: receiving positioning reference signal (PRS) configuration information necessary for measurement; measuring a PRS based on the received PRS configuration information; and transmitting a result of the measurement while maintaining an inactive mode or an idle mode.

Description

A METHOD AND APPARATUS FOR REPORTING MEASUREMENT RESULT FOR POSITIONING IN INACTIVE MODE AND IDLE MODE

The present disclosure relates to a wireless communication system. More specifically, the present disclosure relates to a method for transmitting a measurement result for positioning in an inactive mode and a standby mode, and an apparatus for performing the same.

Efforts to develop an improved 5G (5th generation) communication system or pre-5G communication system to meet the explosively increasing demand for wireless data traffic due to commercialization of 4G (4th generation) communication system and increase in multimedia service is being done For this reason, the 5G communication system or the pre-5G communication system is called a system after the 4G network (beyond 4G Network) communication system or the LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, a 60 GHz band). In order to alleviate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, in the 5G communication system, beamforming, massive MIMO, full dimensional MIMO, FD-MIMO ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, in order to improve the network performance of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network (ultra-dense network) ), device to device communication (D2D), wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and reception interference cancellation ) and other technologies are being developed. In addition, in the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC), which are advanced coding modulation (ACM) methods, and filter bank multi carrier (FBMC), which are advanced access technologies, NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

On the other hand, the Internet is evolving from a human-centered connection network where humans generate and consume information, to an Internet of things (IoT) network in which information is exchanged and processed between distributed components such as things. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between objects, a machine to machine , M2M), and MTC (machine type communication) are being studied. In the IoT environment, an intelligent Internet technology (IT) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, 5G communication technologies such as sensor network, machine to machine (M2M), and MTC (machine type communication) are implemented by techniques such as beamforming, MIMO, and array antenna. there will be The application of a cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 5G technology and IoT technology.

As described above, as various services can be provided according to the development of wireless communication systems, a method for effectively providing these services is required.

An embodiment according to the present disclosure is to provide an apparatus and method for effectively providing a service in a mobile communication system.

The method according to an embodiment of the present disclosure includes the steps of receiving PRS configuration information required for measurement, measuring PRS based on the received PRS configuration information, and measuring the measurement while maintaining an inactive mode or standby mode. It may be characterized in that it comprises the step of transmitting a result.

A UE in an inactive state may report a limited measurement result or split a report message in order to deliver measurement information without performing a state transition.

1 is a diagram illustrating a structure of an LTE system according to an embodiment of the present disclosure.
2 is a diagram illustrating a radio protocol structure of an LTE system according to an embodiment of the present disclosure.
3 is a diagram illustrating a structure of a next-generation mobile communication system according to an embodiment of the present disclosure.
4 is a diagram illustrating a radio protocol structure of a next-generation mobile communication system according to an embodiment of the present disclosure.
5 is a block diagram illustrating an internal structure of a terminal according to an embodiment of the present disclosure.
6 is a block diagram illustrating a configuration of a base station according to an embodiment of the present disclosure.
7 is a flowchart in which a terminal transmits a measurement result using reduced version measurement information according to an embodiment of the present disclosure.
8 is a flowchart illustrating that a UE transmits a measurement result using a UL RRC message segmentation scheme according to an embodiment of the present disclosure.
FIG. 9 is report configuration information configured by the LMF to report reduced version measurement information according to an embodiment of the present disclosure.
10 is report configuration information configured by the LMF for reporting reduced version measurement information according to another embodiment of the present disclosure.

Advantages and features of the present disclosure, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only the present embodiments allow the disclosure of the present disclosure to be complete, and common knowledge in the technical field to which the present disclosure belongs It is provided to fully inform the possessor of 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.

At this time, it will be understood that each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible for the instructions stored in the flowchart block(s) to produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s). The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that instructions for performing the processing equipment provide steps for performing the functions described in the flowchart 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). It should also be noted that in some alternative implementations it is also possible for the functions recited in the blocks to occur out of order. For example, two blocks shown one after another may in fact be performed substantially simultaneously, or it is possible that the blocks are sometimes performed in the reverse order according to the corresponding function.

In this case, the term '~ unit' used in this embodiment means software or hardware components such as field programmable gate array (FPGA) or application specific integrated circuit (ASIC), and '~ unit' performs certain roles. do. However, '-part' is not limited to software or hardware. '~unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and 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 in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card. Also, in an embodiment, '~ unit' may include one or more processors.

In the following description of the present disclosure, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

A term for identifying an access node used in the following description, a term referring to network objects (network entities), a term referring to messages, a term referring to an interface between network objects, and various identification information Terms and the like referring to them are exemplified for convenience of description. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

For convenience of description, 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 terms and names, and may be equally applied to systems conforming to other standards. In the present disclosure, eNB may be used interchangeably with gNB for convenience of description. That is, a base station described as an eNB may represent a gNB. Also, the term terminal may refer to mobile phones, NB-IoT devices, sensors, as well as other wireless communication devices.

Hereinafter, the base station is a subject performing resource allocation of the terminal, and may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a radio access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. Of course, it is not limited to the above example.

In particular, the present disclosure is applicable to 3GPP NR (5th generation mobile communication standard). In addition, the present disclosure provides intelligent services (eg, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, 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 description. That is, a base station described as an eNB may represent a gNB. Also, the term terminal may refer to mobile phones, NB-IoT devices, sensors, as well as other wireless communication devices.

A wireless communication system, for example, 3GPP high speed packet access (HSPA), long term evolution (LTE) or evolved universal terrestrial radio access (E-UTRA), LTE-Advanced (LTE-A), LTE-Pro, high rate packet data (HRPD) of 3GPP2, ultra mobile broadband (UMB), and a broadband wireless that provides high-speed, high-quality packet data service such as communication standards such as 802.16e of IEEE It is evolving into a communication system.

As a representative example of a broadband wireless communication system, in an LTE system, an orthogonal frequency division multiplexing (OFDM) scheme is employed in downlink (DL), and single carrier frequency division multiple access (SC-FDMA) in uplink (UL) is used. ) method is used. The uplink refers to a radio link in which a user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (eNode B or base station (BS)). A wireless link that transmits data or control signals. In the multiple access method as described above, each user's data or control information can be distinguished by allocating and operating the time-frequency resources to which the data or control information is to be transmitted for each user so that they do not overlap each other, that is, orthogonality is established. have.

As a future communication system after LTE, that is, the 5G communication system must be able to freely reflect 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), ultra reliability low latency communication (URLLC), etc. There is this.

According to some embodiments, the eMBB may aim to provide a data transfer rate that is more improved than the data transfer rate supported by the existing LTE, LTE-A, or LTE-Pro. For example, in the 5G communication system, the eMBB should be able to provide a maximum data rate of 20 Gbps in the downlink and a maximum data rate of 10 Gbps in the uplink from the viewpoint of one base station. In addition, the 5G communication system may have to provide the maximum transmission speed and at the same time provide the increased user perceived data rate of the terminal. In order to satisfy such a requirement, the 5G communication system may require improvement of various transmission and reception technologies, including a more advanced multi-antenna (multi input multi output, MIMO) transmission technology. In addition, while transmitting signals using a transmission bandwidth of up to 20 MHz in the 2 GHz band currently used by LTE, the 5G communication system uses a frequency bandwidth wider than 20 MHz in the frequency band of 3 to 6 GHz or 6 GHz or more. Data transfer speed can be satisfied.

At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in the 5G communication system. In order to efficiently provide the Internet of Things, mMTC may require large-scale terminal access support, improved terminal coverage, improved battery life, and reduced terminal cost in a cell. Since the Internet of Things is attached to various sensors and various devices to provide communication functions, it must be able to support a large number of terminals (eg, 1,000,000 terminals/km ² ) within a cell. In addition, since a terminal supporting mMTC is highly likely to be located in a shaded area that a cell cannot cover, such as the basement of a building, due to the characteristics of the service, wider coverage may be required compared to other services provided by the 5G communication system. A terminal supporting mMTC should be configured as a low-cost terminal, and since it is difficult to frequently exchange the battery of the terminal, a very long battery life time such as 10 to 15 years may be required.

Finally, in the case of URLLC, as a cellular-based wireless communication service used for a specific purpose (mission-critical), remote control for a robot or machine, industrial automation, It may be used for services used in unmanned aerial vehicles, remote health care, emergency alerts, and the like. Therefore, the communication provided by URLLC may have 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 ms, and at the same time may have a requirement of a packet error rate of 10 ^-5 or less. Therefore, for a service supporting URLLC, the 5G system must provide a smaller transmit time interval (TTI) than other services, and at the same time, it is a design that requires a wide resource allocation in a frequency band to secure the reliability of the communication link. items may be required.

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

In addition, the embodiment of the present disclosure will be described below using an LTE, LTE-A, LTE Pro or 5G (or NR, next-generation mobile communication) system as an example, but the present disclosure also applies to other communication systems having a similar technical background or channel type. An embodiment of can be applied. In addition, the embodiments of the present disclosure may be applied to other communication systems through some modifications within a range not significantly departing from the scope of the present disclosure as judged by a person having skilled technical knowledge.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

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

1, as shown, the radio access network of the LTE system is a next-generation base station (evolved node B, ENB) (1-05, 1-10, 1-15, 1-20), a mobility management entity (mobility management) It may be composed of an entity, MME) 1-25, and a serving-gateway (S-GW) 1-30. In various embodiments, the next-generation base station may be referred to as a Node B or a base station. A terminal, for example, a user equipment (UE 1-35) may be connected to an external network via an ENB (1-05, 1-10, 1-15, 1-20) and/or an S-GW (1-30). can connect to

In FIG. 1 , ENBs 1-05, 1-10, 1-15, and 1-20 may correspond to existing Node Bs of the UMTS system. The ENB is connected to the UEs 1-35 through a radio 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 voice over IP (VoIP) through the Internet protocol may be serviced through a shared channel. Therefore, there is a need for an apparatus for scheduling by collecting status information such as buffer status, available transmission power status, and channel status of UEs, and the ENB (1-05, 1-10, 1-15, 1-20) is responsible for this. can do. One ENB can usually control multiple cells. For example, in order to implement a transmission rate of 100 Mbps, the LTE system may use, for example, orthogonal frequency division multiplexing (OFDM) as a radio access technology in a 20 MHz bandwidth. In addition, an adaptive modulation & coding (AMC) scheme for determining a modulation scheme and a channel coding rate according to a channel state of the terminal may be applied. The S-GW 1-30 is a device that provides a data bearer, and may create or remove a data bearer according to the control of the MME 1-25. The MME (1-25) is a device in charge of various control functions as well as the mobility management function for the terminal (1-35), and is a device in charge of a plurality of base stations (1-05, 1-10, 1-15, 1-20) and can be connected

2 is a diagram illustrating a radio protocol structure of an LTE system according to an embodiment of the present disclosure.

2, the radio protocol of the LTE system is packet data convergence protocol (PDCP) (2-05, 2-40), radio link control (RLC) ( 2-10, 2-35) and medium access control (MAC) (2-15, 2-30). The PDCPs 2-05 and 2-40 may be in charge of operations such as IP header compression/decompression. The main functions of PDCP (2-05, 2-40) can be summarized as follows.

- Header compression and decompression: ROHC (robust header compression) only

- Transfer of user data

- In-sequence delivery of upper layer PDUs (protocol data units) at PDCP (packet data convergence protocol) re-establishment procedure for RLC (radio link control) AM (acknowledged mode))

- Order reordering function (for split bearers in DC (dual connectivity) (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 function (timer-based SDU discard in uplink.)

The radio link control (RLC) 2-10, 2-35 may perform an automatic repeat request (ARQ) operation by reconfiguring a PDCP packet data unit (PDU) to an appropriate size. . The main functions of RLC can be summarized as follows.

- 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)

- Protocol error detection (only for AM data transfer)

- RLC SDU (service data unit) delete function (RLC SDU discard (only for UM (unacknowledged mode) and AM data transfer))

- RLC re-establishment function (RLC re-establishment)

The MACs 2-15 and 2-30 are connected to several RLC layer devices configured in one terminal, and may perform operations of multiplexing RLC PDUs into MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. The main functions of MAC (2-15, 2-30) can be summarized as follows.

- 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 function (scheduling information reporting)

- HARQ (hybrid automatic repeat request) function (error correction through HARQ)

- Priority handling between logical channels of one UE

- Priority handling between UEs by means of dynamic scheduling

- MBMS (multimedia broadcast and multicast service) service identification function (MBMS service identification)

- Transport format selection

- Padding function (padding)

The physical layer (2-20, 2-25) channel-codes and modulates upper layer data, makes OFDM symbols and transmits them over a radio channel, or demodulates and channel-decodes OFDM symbols received through the radio channel and transmits them to higher layers action can be made.

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

3, the radio access network of the next-generation mobile communication system (hereinafter, NR or 5G) is a next-generation base station (new radio node B, NR gNB) (3-10) and a next-generation radio core network (new radio core network, NR) CN) (3-05). In various embodiments, the next-generation base station may be referred to as an NR base station. A terminal, for example, a new radio user equipment (NR UE) 3-15 may access an external network through the NR gNB 3-10 and/or the NR CN 3-05.

In FIG. 3 , the NR gNB 3-10 may correspond to an evolved node B (eNB) of the existing LTE system. The NR gNB is connected to the NR UE 3-15 through a radio channel and can provide a service superior to that of the existing eNB. In the next-generation mobile communication system, all user traffic may be serviced through a shared channel. Therefore, there is a need for an apparatus for scheduling by collecting state information such as buffer states, available transmission power states, and channel states of UEs (eg, NR UEs 3-15), and the NR gNBs 3-10 can be in charge One NR gNB 3-10 may control multiple cells. In a next-generation mobile communication system, a bandwidth greater than or equal to the current maximum bandwidth may be applied to implement ultra-high-speed data transmission compared to current LTE. In addition, beamforming technology may be additionally grafted by using orthogonal frequency division multiplexing (OFDM) as a radio access technology. In addition, an adaptive modulation & coding (AMC) method for determining a modulation scheme and a channel coding rate according to the channel state of the terminal 3 - 15 may be applied. The NR CN 3-05 may perform functions such as mobility support, bearer setup, QoS setup, and the like. The NR CN (3-05) is a device in charge of various control functions as well as a mobility management function for the terminal (3-15), and may be connected to a plurality of base stations. In addition, the next-generation mobile communication system may be linked with the existing LTE system, and the NR CN (3-05) may be connected to the MME (3-25) through a network interface. The MME (3-25) may be connected to the existing base station eNB (3-30).

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

Referring to FIG. 4, radio protocols of the next-generation mobile communication system are NR service data adaptation protocol (SDAP) (4-01, 4-45), NR PDCP (4-05, 4-40), NR RLC (4-10, 4-35), NR MAC (4-15, 4-30), and NR PHY (4-20, 4-25).

The main functions of the NR SDAPs 4-01 and 4-45 may include some of the following functions.

- Transfer of user plane data

- Mapping between a QoS flow and a DRB for both DL (down link) and UL (up link) for uplink and downlink

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

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

With respect to the SDAP layer device, the UE uses the header of the SDAP layer device for each PDCP layer device or for each bearer or for each logical channel by a radio resource control (RRC) message received from the base station or SDAP layer You can set whether to use the device's function or not. When the SDAP header is set, the non-access stratum (NAS) quality of service (QoS) reflection setting 1-bit indicator (NAS reflective QoS) of the SDAP header and the access stratum (AS) QoS reflection setting 1 By using a bit indicator (AS reflective QoS), it is possible to instruct the UE to update or reset mapping information for uplink and downlink QoS flows and data bearers. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used as data processing priority, scheduling information, etc. to support a smooth service.

The main function of the NR PDCP (4-05, 4-40) may include some of the following functions.

- 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 function (timer-based SDU discard in uplink.)

In the above description, the reordering function of the NR PDCP device may refer to a function of reordering PDCP PDUs received from a lower layer in order based on a 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 rearranged order, or may include a function of directly delivering data without considering the order, and may be lost by reordering It may include a function of recording the PDCP PDUs that have been deleted, a function of reporting a status on the lost PDCP PDUs to the transmitting side, and a function of requesting retransmission of the lost PDCP PDUs. have.

The main function of the NR RLC (4-10, 4-35) may include some of the following functions.

- 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

- Protocol error detection

- RLC SDU discard function (RLC SDU discard)

- RLC re-establishment function (RLC re-establishment)

In the above description, the in-sequence delivery function of the NR RLC device may refer to a function of sequentially delivering RLC SDUs received from a lower layer to a higher layer. When one RLC SDU is originally divided into several RLC SDUs and received, the in-sequence delivery function of the NR RLC device may include a function of reassembling it and delivering it.

The in-sequence delivery function of the NR RLC device may include a function of rearranging the received RLC PDUs based on an RLC sequence number (SN) or a PDCP sequence number (SN), and may be lost by rearranging the order It may include a function of recording the lost RLC PDUs, a function of reporting a status on the lost RLC PDUs to the transmitting side, and a function of requesting retransmission of the lost RLC PDUs. have.

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

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

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

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

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

The NR RLC layer may not include a concatenation function, and may perform a concatenation function in the NR MAC layer or may be replaced with a 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 a function of directly delivering RLC SDUs received from a lower layer to a higher layer regardless of 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 divided into several RLC SDUs and received. The out-of-sequence delivery function of the NR RLC device may include a function of storing the RLC SN or PDCP sequence number (SN) of the received RLC PDUs, sorting the order, and recording the lost RLC PDUs. can

The NR MAC (4-15, 4-30) can be connected to several NR RLC layer devices configured in one terminal, and the main functions of the NR MAC (4-15, 4-30) include some of the following functions can do.

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

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

- Scheduling information reporting function (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

- Transport format selection

- Padding function (padding)

The NR PHY layer (4-20, 4-25) channel-codes and modulates upper layer data, creates an OFDM symbol and transmits it over a radio channel, or demodulates and channel-decodes an OFDM symbol received through a radio channel to a higher layer. You can perform a forwarding action.

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

Referring to the drawings, the terminal includes a radio frequency (RF) processing unit 5-10, a baseband processing unit 5-20, a storage unit 5-30, and a control unit 5-40. .

The RF processing unit 5-10 performs a function for transmitting and receiving a signal through a wireless channel, such as band conversion and amplification of the signal. 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, transmits it through the antenna, and converts the RF band signal received through the antenna to the baseband. down-convert to a signal. For example, the RF processing unit 5-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital to analog converter (DAC), an analog to digital converter (ADC), and the like. can In FIG. 5 , only one antenna is shown, but the terminal may include a plurality of antennas. In addition, the RF processing unit 5-10 may include a plurality of RF chains. Furthermore, the RF processing unit 5-10 may perform beamforming. For beamforming, the RF processing unit 5-10 may adjust the phase and magnitude of each of signals transmitted and received through a plurality of antennas or antenna elements. In addition, the RF processing unit 5-10 may perform MIMO, and may receive multiple layers when performing the MIMO operation.

The baseband processing unit 5-20 performs a function of converting between a baseband signal and a bit stream according to a physical layer standard of the system. For example, when transmitting data, the baseband processing unit 5-20 generates complex symbols by encoding and modulating the transmitted bit stream. Also, upon data reception, the baseband processing unit 5-20 restores the received bit stream by demodulating and decoding the baseband signal provided from the RF processing unit 5-10. For example, in the case of orthogonal frequency division multiplexing (OFDM), when transmitting data, the baseband processing unit 5-20 encodes and modulates a transmission bit stream to generate complex symbols, and maps the complex symbols to subcarriers. After that, OFDM symbols are constructed through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion. In addition, upon data reception, the baseband processing unit 5-20 divides the baseband signal provided from the RF processing unit 5-10 into OFDM symbol units, and a signal mapped to subcarriers through fast Fourier transform (FFT). After restoring the bits, the received bit stream is 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. Accordingly, the baseband processing unit 5-20 and the RF processing unit 5-10 may be referred to as a transmitter, a receiver, a transceiver, 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. In addition, 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 of different frequency bands. For example, different wireless access technologies may include a wireless LAN (eg, IEEE 802.11), a cellular network (eg, LTE), and the like. In addition, the different frequency bands may include a super high frequency (SHF) (eg, 2.NRHz, NRhz) band and a millimeter wave (eg, 60GHz) band.

The storage unit 5-30 stores data such as a basic program, an application program, and setting information for the 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. In addition, the storage unit 5-30 provides the stored data according to the request of the control unit 5-40.

The controller 5-40 controls 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. In addition, the control unit 5-40 writes and reads data in the storage unit 5-40. To this end, the controller 5-40 may include at least one processor. For example, the controller 5-40 may include a communication processor (CP) that controls for communication and an application processor (AP) that controls an upper layer such as an application program.

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

6, the base station includes an RF processing unit 6-10, a baseband processing unit 6-20, a communication unit 6-30, a storage unit 6-40, and a control unit 6-50. is composed by

The RF processing unit 6-10 performs a function for transmitting and receiving a signal through a wireless channel, such as band conversion and amplification of the signal. That is, the RF processing unit 6-10 up-converts the baseband signal provided from the baseband processing unit 6-20 into an RF band signal, transmits it through the antenna, and converts the RF band signal received through the antenna to the baseband. down-convert to a signal. For example, the RF processing unit 6-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. Although only one antenna is shown in FIG. 6 , the first access node may include a plurality of antennas. In addition, the RF processing unit 6-10 may include a plurality of RF chains. Furthermore, the RF processing unit 6-10 may perform beamforming. For beamforming, the RF processing unit 6-10 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements. The RF processing unit may perform a downlink MIMO operation by transmitting one or more layers.

The baseband processing unit 6-20 performs a function of converting a baseband signal and a bit stream according to the physical layer standard of the first radio access technology. For example, when transmitting data, the baseband processing unit 6-20 generates complex symbols by encoding and modulating the transmitted bit stream. Also, upon data reception, the baseband processing unit 6-20 restores the received bit stream by demodulating and decoding the baseband signal provided from the RF processing unit 6-10. For example, in the OFDM scheme, when transmitting data, the baseband processing unit 6-20 generates complex symbols by encoding and modulating the transmission bit stream, maps the complex symbols to subcarriers, and performs IFFT operation and OFDM symbols are configured through CP insertion. Also, upon data reception, the baseband processing unit 6-20 divides the baseband signal provided from the RF processing unit 6-10 into OFDM symbol units, and restores signals mapped to subcarriers through FFT operation. , recovers the received bit stream through demodulation and decoding. The baseband processing unit 6-20 and the RF processing unit 6-10 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 transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.

The backhaul communication unit 6-30 provides an interface for performing communication with other nodes in the network. That is, the backhaul communication unit 6-30 converts a bit string transmitted from the main 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 do.

The storage unit 6-40 stores data such as a basic program, an application program, and setting information for the operation of the main station. In particular, the storage unit 6-40 may store information on a bearer allocated to an accessed terminal, a measurement result reported from the accessed terminal, and the like. Also, the storage unit 6-40 may store information serving as a criterion for determining whether to provide or stop multiple connections to the terminal. In addition, the storage unit 6-40 provides the stored data according to the request of the control unit 6-50.

The control unit 6-50 controls overall operations of the main 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. In addition, the control unit 6-50 writes and reads data in the storage unit 6-40. To this end, the controller 6-50 may include at least one processor.

According to an embodiment, the terminal receives positioning reference signal (PRS) configuration information using LTE positioning protocol (LPP) measurement assistance information in a situation in an inactive mode (eg, RRC inactive), A downlink PRS (DL PRS) may be measured using the received PRS configuration information. For example, the UE may measure the signal strength for DL PRS, the difference in arrival time between reference signals, and the like. According to various embodiments, when the terminal wants to transmit the measurement result for the DL PRS to the LMF without a state transition from the inactive mode to the connected mode (eg, RRC connected), the following at least some of the operations of

- As a result of the measurement, an LPP Provide Location Information message may be generated, and the RRC encapsulates the LPP Provide Location Information message in a ULInformationTransfer message, and the ULInformationTransfer message may be transmitted to a lower layer.

- In generating the RRC UL message, for example, the ULInformationTransfer message, the SRB suspension of the UE that was performed when the UE state transitions to the inactive mode or the standby state may be restored. In addition, when the state of the terminal is transitioned to the inactive mode or the standby state, the reset security parameters (security parameters) may be restored and used again. In addition, MAC/RLC/PDCP settings may use a setting in a connected mode or a default setting.

- The RRC UL message, for example, the ULInformationTransfer message may be included in a MAC PDU, and may be transmitted in msg 3 when random access is successful.

According to an embodiment, the size of an uplink grant received through random access is an LPP Provide Location Information message including the measured information, for example, a measurement result of a UE for DL PRS. Or it may not be large enough to transmit the RRC ULInformationTransfer message. Accordingly, the terminal may transmit the measurement result to a location management function (LMF) using at least one of the following methods.

(1) How to use the reduced version:

In an embodiment, the terminal may receive the LPP Request Location Information message from the LMF in the connected mode. The LPP Request Location Information message may include at least one indicator. The at least one indicator may mean that the UE is in a standby state (idle) or inactive (RRC inactive) mode, measurement information can be reported, or the UE is in a standby state (idle) or inactive (RRC inactive) In the mode, when reporting the measurement information, it may mean to transmit in a reduced version. The reduced version may be understood as a version in which some of the specific reporting elements are omitted compared to the measurement result of the existing general version. In an embodiment, when the at least one indicator is included in the LPP Request Location Information message and received while the terminal is in the connected mode, the terminal includes the measurement information (or measurement result) in the LPP Provide Location information to the LMF. can transmit At this time, if the terminal is in the connected mode, the terminal may transmit normal (normal) measurement information, not a reduced version, by including the LPP Provide Location Information message. In an embodiment, when the terminal transmits the measurement information, if the terminal is in an inactive mode (inactive) or in an idle state (Idle), the terminal may transmit the reduced version of the measurement information by including the LPP Provide Location Information message.

When the at least one indicator is included in the LPP Request Location Information message, a separate information element (IE) or a separate field for reduced version measurement information may be added to the reportConfig of each method. This added field may be understood as a field indicating that the report information including a plurality of elements among the report information of the normal measurement request field includes only some of the plurality of elements. have. That is, the added field may be understood as a field instructing to report only limited information compared to the information reported by the terminal according to the general measurement request field.

For example, maxDL-PRS-RSTD-MeasurementsPerTRPPair-r16 in the NR-DL-TDOA-Reportconfig field under the field in NR-DL-TDOA-RequestLocationInformation . INTEGER (1..4) is a general field, and this field may mean to report up to four reference signal time difference measurement (RSTD) values measured per specific TRP pair (two specific TRPs). A field such as Red-maxDL-PRS-RSTD-MeasurementsPerTRPPair INTEGER (1..2) may exist in the same position as the field, and the field contains two RSTD values measured per specific TRP pair (two specific TRPs). This may mean reporting up to The above field may be defined as a field used only in the case of an inactive mode or an idle state as a conditional presence. The general measurement request field and the reduced version request field may be transmitted together from the LMF to the terminal. The UE may report the measurement result according to the general measurement request field in the connected state with respect to the transmitted field, and may report the measurement result according to the reduced version request field in the inactive mode or standby state.

If the terminal is in an inactive mode or idle, regardless of the indicator, a conditional presence indication may be used in a field to be included in a report message when reporting measurement information. When the conditional presence indication is displayed in the field, the terminal may consider the displayed field when it wants to transmit a measurement result message in an inactive mode or an idle state. In this case, the field for the same type of general report message may be ignored.

In another embodiment, the terminal does not use the conditional presence field as described above, and the terminal selects fields marked as optional on the message reporting the current measurement result, and the terminal includes only the selected fields in the measurement result report message There may be a way to do it. In this embodiment, the UE may select some of the fields marked as optional based on the size of the UL grant obtained by performing random access (eg, in a range that does not exceed the size). The terminal may include only the selected fields in the result report message.

When the UE performs the measurement and the result is available, the UE may check whether the current state is an inactive mode or an idle state. If the state of the terminal is the inactive mode or the standby state, the terminal may include the reduced version of the measurement information in the Provide Location Information message. The UE may transmit the Provide Location Information message to a lower layer, and may transmit it as msg 3 after random access in the MAC.

(2) In case of using message segmentation method:

According to an embodiment, the UE may transmit the measurement result to the LMF by using the division of the UL RRC message. According to various embodiments, a specific system information block (SIB) of each cell, for example, SIB X (where X may have any value including 1, SIB X may be understood to include all SIB types) There is), PDCP SDU size information may be broadcast (broadcasting). In the PDCP SDU size information, when the UE includes the LPP Provide Location Information message including the positioning measurement result in the RRC ULInformationTransfer message and transmits it in the inactive mode or in the idle state, the RRC ULInformationTransfer message means that the message can be divided. information may be included.

After the PRS measurement, the camping UE in the inactive mode or standby state that has obtained the PDCP SDU size information may include the measurement result information in the LPP Provide Location Information message and transmit it. At this time, the terminal determines the PDU size (this is the same as the PDCP SDU size) of the RRC UL message (eg, ULInformationTransfer message) encapsulating the LPP Provide Location Information message. The threshold value broadcast in SIB X can be compared. In an embodiment, when the size of data to be transmitted (eg, a PDU of an RRC UL message) is greater than the threshold value, the terminal may divide the data in units of the threshold value.

The UL RRC message includes a ULInformationTransfer message, but is not limited to the ULInformationTransfer message.

When dividing the UL RRC message, the following operation may be performed.

In an embodiment, the UE may divide the encoded RRC PDU (eg, the PDU of the ULInformationTrnasfer message) based on the supported maximum size of the PDCP SDU indicated in SIB X. The UE may minimize the number of segmented segments and set the content of the ULDedicatedMessageSegment_POS message as follows (Table 1). (The UE shall segment the encoded RRC PDU (ULInformationTrnasfer msg) based on the maximum supported size of a PDCP SDU indicated in SIB X. UE shall minimize the number of segments and set the contents of the ULDedicatedMessageSegment_POS messages as follows):

1> For each new UL DCCH message, set the segmentNumber to 0 for the first message segment and increment the segmentNumber for each subsequent RRC message segment;

1> set rrc-MessageSegmentContainer to include the segment of the UL DCCH message (ULInformationTransfer msg) corresponding to the segmentNumber;

1> if the segment included in the rrc-MessageSegmentContainer is the last segment of the UL DCCH message:
2> set the rrc-MessageSegmentType to lastSegment;

1> else:
2> set the rrc-MessageSegmentType to notLastSegment;

1> submit all the ULDedicatedMessageSegment_POS messages generated for the segmented RRC message to lower layers for transmission in ascending order based on the segmentNumber, upon which the procedure ends.

1> For each new UL DCCH message, set the segmentNumber to 0 for the first message segment and increment the segmentNumber for each subsequent RRC message segment;

1> set rrc-MessageSegmentContainer to include the segment of the UL DCCH message (ULInformationTransfer msg) corresponding to the segmentNumber ;

1> if the segment included in the rrc-MessageSegmentContainer is the last segment of the UL DCCH message:
2> set the rrc-MessageSegmentType to lastSegment;

1> else:
2> set the rrc -MessageSegmentType to notLastSegment ;

1> submit all the ULDedicatedMessageSegment_POS messages generated for the segmented RRC message to lower layers for transmission in ascending order based on the segmentNumber, upon which the procedure ends.

According to an embodiment, a plurality of ULDedicatedMessageSegment_POS messages may be generated while the ULInformationTransfer message is divided. Each ULDedicatedMessageSegment_POS message may include the segmented part of the ULInformationTransfer message as an octet string, and a segmentNumber according to the generation order of each segmented part may be assigned as an integer. In addition, each ULDedicatedMessageSegment_POS message may include an indicator (1-bit indicator) indicating whether the corresponding segment is the last segment or not.

When transmitting the ULDedicatedMessageSegment_POS message, the UE may perform random access in an inactive mode or a standby state, and may be allocated a separate UL grant. The UE may transmit a UL ULdedicatedmessagesegment_POS message through the allocated UL grant. In an embodiment, if the size of the allocated UL grant is large enough to accommodate the ULInformationTransfer message, splitting the ULInformationTransfer message may be unnecessary. In this case, the UE may transmit the ULInformatoinTransfer message without division.

For the above operation, the base station may separately allocate a random access preamble and a random access resource for transmission of measurement result information of positioning to SIB1. The allocated information may be broadcast as configuration information to SIB1.

As detailed information, a general random access preamble (RA preamble) is transmitted on the specific random access resource, or the specific (eg, for positioning) preamble is transmitted on the specific random access resource, or general random access When transmitting the specific (eg, positioning) preamble on a resource, the base station may recognize that the corresponding terminal obtains a UL grant for transmitting measurement information for positioning. The base station may separately allocate a UL grant for positioning, which has a larger size than the general case, to the terminal.

The UE may attach a not end tag bit to the message while transmitting the fragmented UL message. The base station confirming the corresponding bit may transmit the UL grant to the resource indicated by the RA-RNTI on the PDCCH.

According to various embodiments, the two methods may be used simultaneously.

If the terminal receives the indicator in a connected situation, generates an RRC ULInformationTrnasfer message including the measurement result of the reduced version in the inactive mode or standby state, and the PDCU SDU size threshold transmitted from SIB X in the corresponding serving cell is Given this, if the size of the generated RRC ULInformationTrnasfer message is greater than the threshold, the UE may perform segmentation of the RRC UL message. The UE may transmit the divided RRC message to the serving cell by including it in the UL grant.

7 is a flowchart in which a terminal transmits a measurement result using reduced version measurement information according to an embodiment of the present disclosure.

Referring to FIG. 7 , in an embodiment, the terminal may receive a Provide Assistance Information message from the LMF in a connected state. The UE may obtain DL PRS configuration information through the Provide Assistance Information message. In an embodiment, the terminal may receive a Request Location Information message from the LMF, and may receive a command to perform measurement using a specific method through the Request Location Information message. The terminal may receive an indicator related to the use of the reduced version along with the reception of the Request Location Information message. According to an embodiment, since the terminal is still connected at the time of performing measurement and reporting the measurement result, when generating the LPP Provide Location Information message including the measurement result, a general measurement result rather than a reduced version is used. You can create messages that contain The generated LPP Provide Location Information message may be delivered to the LMF.

According to an embodiment, the terminal may then receive the LPP Request Location Information message again and start a new LPP session. In an embodiment, the terminal may obtain an indicator related to the use of the reduced version through the received LPP Request Location Information message, and in this state, may receive an RRCRelease with suspendConfig message from the serving cell. The RRC may inform the upper layer, that is, the LPP, that the current terminal is state transitioned to an inactive mode. If the LPP receives the indication for the state transition from the RRC, and the UE receives an indicator to report the measurement result in a reduced version in the LPP message (eg, the LPP Request Location Information message) from the LMF, the UE writes a measurement result message When you do, you can write a reduced version. In an embodiment, the terminal may operate in an inactive mode and may report a measurement result. In an embodiment, the UE may be in an inactive mode at a time point to perform measurement and report a measurement result, and may generate a message including a reduced version of the measurement result. The generated LPP Provide Location Information message may be included in the RRC ULInformationTransfer message and may be transmitted to the serving cell. In this case, the UE may perform random access by using a random access preamble/resource for positioning in SIB1 of the serving cell, and may be allocated a separate UL grant. Through this, when the terminal transmits the ULInformationTransfer message to the serving cell, the serving base station (or serving cell) may deliver only the LPP Provide Location Information message to the LMF.

8 is a flowchart illustrating a UE transmitting a measurement result using a UL RRC message segmentation scheme according to an embodiment of the present disclosure.

Referring to FIG. 8 , the terminal may receive a Provide Assistance Information message from the LMF in a connected state, and may acquire measurement assistance information through this. In an embodiment, the terminal may receive a Request Location Information message from the LMF, and may receive a command to perform measurement using a specific method through the Request Location Information message. In an embodiment, the serving cell (or serving base station) may transmit the RRCRelease with suspendConfig message to the terminal regardless of the LPP operation, and through this, the terminal may request a state transition to operate in an inactive mode.

According to an embodiment, the terminal may then measure the PRS using the DL PRS configuration information obtained through the Provide Assistance Information message and generate an LPP Provide Location Information message for reporting the measurement result. At this time, when the serving cell sets and broadcasts a separate RA preamble and resource for positioning in SIB1, the UE performs random access using the corresponding preamble and/or resource and performs a separate UL grant can be assigned. Separately, if the serving cell broadcasts PDCP SDU size information for segmentation in SIB X, the UE compares the generated ULInformationTransfer message with the PDCP SDU size to perform segmentation. The UE may continuously UL transmit the divided RRC messages.

After receiving the segment messages and confirming the last segment message, the serving cell may combine the segment messages to recover one complete RRC ULInformationTrnasfer message. The serving cell may extract only the LPP Provide Location Information message from among the restored ULInformationTrnasfer messages and deliver it to the LMF.

According to an embodiment, in addition to the case of transmitting segmented data using the RA preamble, the UE may transmit each segmented positioning data using a configured grant. The UE may receive configuration information of a configured uplink grant that can be used in the inactive mode (inactive) from SIB1 of the serving cell after transition to the inactive mode. The setting information may include the following information:

- BWP information and initial UL BWP information of the configured UL grant to be used in a state where the terminal is in an inactive mode (eg, UL BWP center frequency indication or offset location information, and bandwidth information, subcarrier spacing information, etc.)

- Information on the type of Configured grant: type 1 or type 2

- Whether frequency hopping is intra slot or inter slot

- MCS table information to be used for UL transmission

- Number of HARQ processes allowed

- Time domain offset information of UL resource

- Time domain allocation information of UL resources

- Frequency domain allocation information of UL resources

- Precoding and layer setting information to be used for UL transmission

- SRS resource indicator

- MCS and TB size information to be used for UL transmission

- Frequency hopping information

- CG retransmission timer value

- MAC index of Configured grant index and configured grant config

The terminal may receive the configuration information and write uplink positioning data (ie, LPP message). In this case, if the condition to use the grant configured in the AS layer of the terminal is met, the terminal divides the RRC PDU including the created LPP message based on the data size accepted in the grant (segment) can do. Each of the divided segments may be sequentially delivered to the base station using a configured UL grant.

In this case, unlike the case of transmitting segments using random access, after transmission of each segment, the UE does not need to receive additional UL grant information on the PDCCH. In other words, in the case of a method of transmitting divided data using a configured grant, the UE does not receive UL grant information on the PDCCH, but sequentially transmits segments according to the UL grant of a given configured grant. .

The base station may check the end tag of each segment and confirm reception of the last segment. The base station may merge the received segments after receiving the last segment. The base station may deliver the LPP message to the LMF by decapsulating the LPP message using the merged segments. The operation of confirming the reception of the last segment described above, merging the segments, and performing decapsulation of the LPP message, regardless of whether a reduced version measurement result is included or not, all LPP uplink data transmitted using the configured grant Can be applied to forwarding messages.

In another embodiment, the serving base station (or serving cell) may transmit PDCP SDU size information for splitting to the terminal as an RRC dedicated signal in a connected state, or in the corresponding serving base station (or serving cell), the system As information (system information), PDCP SDU size information for the division may be transmitted to the terminal. In an embodiment, the terminal may operate in an inactive mode according to a state transition request of a serving base station (or serving cell). In this case, when the terminal intends to report a reference signal measurement result corresponding to each measurement method or a position estimation result through the LPP Provide Location Information message in an inactive situation, the LPP Provide Location Information message may be divided. The UE may divide the LPP Provide Location Information message by using the PDCP SDU size information. For example, the UE may inversely calculate the size of the LPP Provide Location Information message included in the PDCP SDU, and may determine whether to split by comparing the size of the LPP message with the size of the PDCP SDU. For example, if the size of the original LPP Provide Location Information message is smaller than or equal to the size of the PDCP SDU, the UE includes the LPP Provide Location Information message as it is in the PDCP SDU without dividing it, and the size of the LPP Provide Location Information message is the size of the PDCP SDU. If larger, the LPP Provide Location Information message may be divided in the LPP layer and included in the PDCP SDU. In this case, the UE may transmit the RRC message including the divided segment to a lower layer for wireless transmission without performing a separate division.

As another example, after the LMF determines to request Location Information from the terminal, it not only delivers the LPP Request Location Information message to the terminal, but also sends an NRPPa protocol message to the serving base station (or serving cell) of the terminal, the measurement requested from the terminal You can also pass setting information about the result. This setting information may include one or more of the following listed information.

- How to measure

- Periodic/aperiodic indicator of measurement report

- Periodicity value required for periodic reporting of measurement report

- LPP message size in measurement report (minimum, or maximum, or a range value of both)

Additionally, the information delivered to the UE is not a PDCP SDU constraint value (eg, PDCP SDU size information, which is a size constraint value for a PDCP SDU), but a PDCP PDU constraint value (eg, PDCP PDU size information), or RRC The SDU constraint value (eg, RRC SDU size information) or RRC PDU constraint value (eg, RRC PDU size information) may be defined and delivered. According to the type of the transmitted constraint value, the UE may fix the size of a constrained data unit and may determine whether it can be divided in a corresponding higher layer. For example, if the original size of the upper message is larger than the transmitted constraint value (eg, the size of the constrained data unit), the terminal performs segmentation in the corresponding upper layer, and thereby the upper message (eg, segments of the upper message) It can be controlled so that the size of does not exceed the maximum value of the size of the constrained data unit.

FIG. 9 is report configuration information configured by the LMF for reporting reduced version measurement information according to an embodiment of the present disclosure.

Referring to FIG. 9 , the request message of the NR TDOA may include a 1-bit indicator for reporting reduced version measurement information. A field related to additional measurement result information included in the reduced version measurement result is expressed in NR-DL-TDOA-ReportConfig. For example, the fields related to the separate measurement result information include a maxDL-PRS-RSTD-MeasurementsPerTRPPairInactive INTEGER (1..2) field and a timingReportingGranularityFactorInactive field. It may include an INTEGER (4..5) field. The field related to the separate measurement result information may be applied only when the reduced version of the measurement information (or measurement result) is reported.

10 is report configuration information configured by the LMF for reporting reduced version measurement information according to another embodiment of the present disclosure. The report configuration information shown in FIG. 10 may correspond to the NR ECID (enhanced cell-ID) method.

Referring to FIG. 10 , a 1-bit indicator for reporting reduced version measurement information may be included in the NR ECID request message. A field related to additional measurement result information included in the reduced version measurement result is reducedReport ENUMERATED {true} field, red-NR-MeasuredResultsElement (1..4) field, red-ResultsPerSSB-Index (1..8) field, and red0ResultsPerCSI-RS-Index (1..8) fields may be included. The field related to the separate measurement result information may be applied only when the reduced version of the measurement information (or measurement result) is reported.

Claims (1)

A method performed in a wireless communication system, the method comprising:
Receiving PRS configuration information required for measurement;
measuring PRS based on the received PRS configuration information; and
Method including; transmitting the measurement result in a state in which the inactive mode or the standby mode is maintained.

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