KR20200096052A - Method and apparatus for performing early frequency measurement and reporting by a terminal in non-connected mode of next generation wireless communication system - Google Patents

Abstract

The present disclosure relates to a communication technique for fusing a 5^th generation (5G) communication system with an Internet of things (IoT) technology to support a higher data transmission rate than that of a 4^th generation (4G) system and a system thereof. The present disclosure can be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety related services, etc.) based on a 5G communication technology and an IoT-related technology. According to the present invention, a method and an apparatus for fast frequency measurement and report are disclosed. According to the present invention, a control signal processing method in a wireless communication system comprises the steps of: receiving a first control signal transmitted from a base station; processing the first control signal received; and transmitting a second control signal generated based on the processing to the base station.

Description

Method and device for fast frequency measurement and reporting by a non-connected terminal in a next-generation mobile communication system {METHOD AND APPARATUS FOR PERFORMING EARLY FREQUENCY MEASUREMENT AND REPORTING BY A TERMINAL IN NON-CONNECTED MODE OF NEXT GENERATION WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for a non-connected terminal to rapidly perform and report a frequency measurement result in a next-generation mobile communication system.

Efforts are being made to develop an improved 5G communication system or a pre-5G communication system in order to meet the increasing demand for wireless data traffic after the commercialization of 4G communication systems. For this reason, a 5G communication system or a pre-5G communication system is called a Beyond 4G Network communication system or an LTE system and a Post LTE system. The 5G communication system defined by 3GPP is called the New Radio (NR) system.

To achieve high data rates, 5G communication systems are contemplated for implementation in the ultra-high frequency (mmWave) band (eg, 60 gigabit (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, in 5G communication systems, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) ), array antenna, analog beam-forming, and large scale antenna techniques were discussed and applied to NR systems.

In addition, in order to improve the network of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), and an ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation And the like are being developed.

In addition, in 5G systems, advanced coding modulation (ACM) methods such as Hybrid FSK and QAM Modulation (FQAM) and SWSC (Sliding Window Superposition Coding), advanced access technologies such as Filter Bank Multi Carrier (FBMC), NOMA (non-orthogonal multiple access), and sparse code multiple access (SCMA) have been developed.

Meanwhile, the Internet is evolving from a human-centered connection network where humans generate and consume information, to an Internet of Things (IoT) network that exchanges information between distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connection to cloud servers, is also emerging. In order to implement IoT, technical elements such as sensing technology, wired/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 (Machine to Machine) , M2M), MTC (Machine Type Communication) and other technologies are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects to create new values in human life may be provided. IoT is the field of smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliance, advanced medical service, etc. through the convergence and combination of existing IT (Information Technology) technology and various industries. Can be applied to.

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

Meanwhile, various studies are being conducted to improve the operation related to the frequency measurement of a terminal in a next-generation communication system.

In order to support a service having a high data rate and a low transmission delay in a next-generation mobile communication system, the base station needs to quickly set up a frequency aggregation technology (CA) or a dual connectivity (DC) technology to the terminal. However, in order to set the above technologies to the terminal, the frequency measurement result of the terminal is required. Therefore, there is a need for a method capable of quickly reporting and receiving a frequency measurement result of a terminal.

As a method for allowing the UE to quickly report the frequency measurement result, the UE may perform frequency measurement in an RRC idle mode or an RRC inactive mode. However, the RRC idle mode or RRC deactivation mode UE may perform a cell reselection procedure while moving with mobility. In addition, a cell newly camped on by the terminal according to the movement of the terminal may broadcast different system information and may support different functions. Therefore, when the terminal camps on a cell that cannot report the measurement result because it does not support RRC idle mode or RRC deactivation mode frequency measurement, frequency measurement may be performed unnecessarily, and when the terminal moves quickly, in another cell There may be a problem of reporting the measured frequency measurement result to another cell.

The present invention for solving the above problems is a method for processing a control signal 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.

The present invention proposes a method for allowing a terminal to quickly report a measurement result of a neighboring frequency to a base station in a next-generation mobile communication system, so that the base station can quickly set a frequency aggregation technology or a dual access technology to the terminal. Specifically, the carrier aggregation technology allows the terminal to perform frequency measurement based on the preset frequency setting information before the terminal establishes a connection with the network, and to report the frequency measurement result immediately when the terminal establishes a connection with the network. (CA, Carrier Aggregation) or dual connectivity technology (DC, Dual Connectivity) can be set to the terminal.

In addition, when the RRC idle mode or RRC inactive mode UE performs a cell reselection procedure while moving with mobility, a procedure for stopping or restarting the RRC idle mode or RRC inactive mode frequency measurement or discarding the frequency measurement result based on system information is performed. This is proposed to solve the problem of the UE unnecessarily performing frequency measurement and the problem of the UE reporting the frequency measurement result measured in another cell to the current cell.

1A is a diagram showing the structure of an LTE system to which the present invention can be applied.
1B is a diagram showing a radio protocol structure in an LTE system to which the present invention can be applied.
1C is a diagram showing the structure of a next-generation mobile communication system to which the present invention can be applied.
1D is a diagram showing a radio protocol structure of a next generation mobile communication system to which the present invention can be applied. .
1E is a procedure for a UE to switch from an RRC idle mode or an RRC inactive mode to an RRC connected mode and set a carrier aggregation technology in the next-generation mobile communication system of the present invention. It is a figure shown.
FIG. 1F shows that in the next-generation mobile communication system of the present invention, a terminal enables early measurement of a frequency in an RRC idle mode or an RRC deactivation mode, and a fast measurement report. It is a diagram showing the first embodiment.
1G is a diagram illustrating a terminal operation for performing frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention and reporting a measurement result.
1H shows the structure of a terminal to which an embodiment of the present invention can be applied.
1I shows a block configuration of a TRP in a wireless communication system to which an embodiment of the present invention can be applied.
2A is a diagram showing the structure of an LTE system to which the present invention can be applied.
2B is a diagram showing a radio protocol structure in an LTE system to which the present invention can be applied.
2C is a diagram showing the structure of a next-generation mobile communication system to which the present invention can be applied.
2D is a diagram illustrating a radio protocol structure of a next-generation mobile communication system to which the present invention can be applied. .
2E is a procedure for a UE to switch from an RRC idle mode or an RRC inactive mode to an RRC connected mode and set a carrier aggregation technology in the next-generation mobile communication system of the present invention. It is a figure shown.
FIG. 2F shows that in the next-generation mobile communication system of the present invention, a terminal enables early measurement of a frequency in an RRC idle mode or an RRC deactivation mode, and a fast measurement report. It is a diagram showing the first embodiment.
2G is a diagram illustrating a case of performing unnecessary frequency measurement when a terminal performs frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention.
FIG. 2H is a diagram illustrating a problem of reporting a frequency measurement result measured by another cell to a current cell when a UE performs RRC idle mode or RRC deactivation mode frequency measurement proposed in the present invention.
Figure 2i is when the UE temporarily camps on a cell that does not support RRC idle mode or RRC deactivation mode frequency measurement when the UE performs frequency measurement in the RRC idle mode or RRC inactive mode proposed in the present invention, and then returns to the supporting cell. It is a diagram explaining the problem of no longer performing frequency measurement.
FIG. 2j is a diagram illustrating a terminal operation for performing frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention and reporting a measurement result.
2K shows the structure of a terminal to which an embodiment of the present invention can be applied.
2L illustrates a block configuration of TRP in a wireless communication system to which an embodiment of the present invention can be applied.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description, when it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

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

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

In this case, it will be appreciated that each block of the flowchart diagrams and combinations of the flowchart diagrams may be executed by computer program instructions. Since these computer program instructions can be mounted on the processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, the instructions executed by the processor of the computer or other programmable data processing equipment are described in the flowchart block(s). It creates a means to perform functions. These computer program instructions can 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 an article of manufacture containing instruction means for performing the functions described in the flowchart block(s). Since computer program instructions can also be mounted on a computer or other programmable data processing equipment, a series of operational steps are performed on a computer or other programmable data processing equipment to create a computer-executable process to create a computer or other programmable data processing equipment. It is also possible for instructions to perform processing equipment to provide steps for performing the functions described in the flowchart block(s).

In addition, each block may represent a module, segment, or part of code that contains one or more executable instructions for executing the specified logical function(s). In addition, it should be noted that in some alternative execution examples, functions mentioned in blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks are sometimes executed in reverse order according to a corresponding function.

In this case, the term'~ unit' used in the present embodiment refers to software or hardware components such as FPGA or ASIC, and'~ unit' performs certain roles. However,'~ part' is not limited to software or hardware. The'~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example,'~ unit' 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, database, data structures, tables, arrays, and variables. The functions provided within 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 a security multimedia card.

Terms used to identify a connection node used in the following description, terms referring to network objects, terms referring to messages, terms referring to interfaces between network objects, terms referring to various identification information Etc. are exemplified for convenience of explanation. Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having an equivalent technical meaning may be used.

For convenience of description below, the present invention uses terms and names defined in the 3GPP 3rd Generation Partnership Project Long Term Evolution (LTE) standard. However, the present invention is not limited by the terms and names, and may be applied to systems conforming to other standards. In the present invention, the eNB may be used in combination with the gNB for convenience of explanation. That is, a base station described as an eNB may indicate gNB.

<First Example>

1A is a diagram showing the structure of an LTE system to which the present invention can be applied.

Referring to Figure 1a, as shown, the radio access network of the LTE system is a next-generation base station (Evolved Node B, hereinafter referred to as ENB, Node B or base station) (1a-05, 1a-10, 1a-15, 1a-20) It consists of MME (1a-25, Mobility Management Entity) and S-GW (1a-30, Serving-Gateway). User equipment (hereinafter referred to as UE or UE) 1a-35 accesses an external network through ENBs 1a-05 to 1a-20 and S-GW 1a-30.

In FIG. 1A, ENBs 1a-05 to 1a-20 correspond to the existing node B of the UMTS system. The ENB is connected to the UEs 1a-35 through a radio channel and performs 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, are serviced through a shared channel, so status information such as buffer status of UEs, available transmission power status, channel status, etc. It is necessary to have a device for scheduling by collecting, and ENB (1a-05 ~ 1a-20) is in charge. One ENB usually controls multiple cells. For example, in order to realize a transmission speed of 100 Mbps, the LTE system uses, for example, an orthogonal frequency division multiplexing (OFDM) in a 20 MHz bandwidth as a radio access technology. In addition, an adaptive modulation & coding (hereinafter referred to as AMC) method is applied to determine a modulation scheme and a channel coding rate according to a channel state of a terminal. S-GW (1a-30) is a device that provides a data bearer, and generates or removes a data bearer under the control of the MME (1a-25). The MME is a device responsible for various control functions as well as mobility management functions for a terminal, and is connected to a number of base stations.

1B is a diagram showing a radio protocol structure in an LTE system to which the present invention can be applied.

Referring to Figure 1b, the radio protocol of the LTE system is the PDCP (Packet Data Convergence Protocol 1b-05, 1b-40), RLC (Radio Link Control 1b-10, 1b-35), MAC (Medium Access) respectively in the terminal and the ENB Control 1b-15, 1b-30). PDCP (Packet Data Convergence Protocol) (1b-05, 1b-40) is responsible for IP header compression/restore. The main functions of PDCP are summarized as follows.

-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

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

Radio link control (hereinafter referred to as RLC) (1b-10, 1b-35) reconfigures the PDCP packet data unit (PDU) to an appropriate size to perform ARQ operation and the like. The main functions of RLC are 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)

-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

MAC (1b-15, 1b-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. The main functions of MAC are 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

-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 physical layer (1b-20, 1b-25) channel-codes and modulates upper layer data, converts it into OFDM symbols, and transmits it to the radio channel, or demodulates OFDM symbols received through the radio channel and decodes the channel and delivers it to the upper layer Do the action.

1C is a diagram showing the structure of a next-generation mobile communication system to which the present invention can be applied.

Referring to Figure 1c, as shown, 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, hereinafter NR gNB or NR base station) (1c-10) and NR CN (1c). -05, New Radio Core Network). The user terminal (New Radio User Equipment, NR UE or terminal) 1c-15 accesses the external network through the NR gNB 1c-10 and the NR CN 1c-05.

In FIG. 1C, the NR gNB 1c-10 corresponds to an Evolved Node B (eNB) of an existing LTE system. The NR gNB is connected to the NR UE (1c-15) through a radio channel and can provide superior service than the existing Node B. In the next-generation mobile communication system, all user traffic is serviced through a shared channel, so a device that collects and schedules status information such as buffer status, available transmission power status, and channel status of UEs is required. (1c-10) is in charge. One NR gNB usually controls multiple cells. In order to implement ultra-high-speed data transmission compared to the current LTE, it may have more than the existing maximum bandwidth, and orthogonal frequency division multiplexing (hereinafter referred to as OFDM) as a wireless access technology may additionally incorporate beamforming technology. . In addition, an adaptive modulation & coding (hereinafter referred to as AMC) method is applied to determine a modulation scheme and a channel coding rate according to a channel state of a terminal. NR CN (1c-05) performs functions such as mobility support, bearer setup, and QoS setup. The NR CN is a device responsible for various control functions as well as mobility management functions for a terminal, and is connected to a plurality of base stations. In addition, the next generation mobile communication system can be linked with the existing LTE system, and the NR CN is connected to the MME (1c-25) through a network interface. MME is connected to the existing base station eNB (1c-30).

1D is a diagram showing a radio protocol structure of a next generation mobile communication system to which the present invention can be applied. .

Referring to Figure 1d, the radio protocol of the next-generation mobile communication system is NR SDAP (1d-01, 1d-45), NR PDCP (1d-05, 1d-40), NR RLC (1d-10) in the terminal and the NR base station, respectively. , 1d-35), and NR MACs (1d-15, 1d-30).

The main functions of the NR SDAP (1d-01, 1d-45) may include some of the following functions.

-Transfer of user plane data

-Mapping function between 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 for both uplink and downlink (marking QoS flow ID in both DL and UL packets)

-Reflective QoS flow to DRB mapping for the UL SDAP PDUs for uplink SDAP PDUs.

For the SDAP layer device, the UE can set whether to use the header of the SDAP layer device or the function of the SDAP layer device, for each PDCP layer device, for each bearer, or for each logical channel, as an RRC message, and the SDAP header When is set, the NAS QoS reflection setting 1-bit indicator (NAS reflective QoS) of the SDAP header and the AS QoS reflection setting 1-bit indicator (AS reflective QoS) allow the UE to map the uplink and downlink QoS flow and mapping information for the data bearer. You can instruct it to update or reset. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used as data processing priority and scheduling information to support a smooth service.

The main functions of NR PDCP (1d-05, 1d-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

-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, the order reordering function of the NR PDCP device refers to a function of rearranging the PDCP PDUs received from the lower layer in order based on the PDCP sequence number (SN), and the function of delivering data to the upper layer in the rearranged order. It may include, or may include a function of immediately delivering without considering the order, may include a function of recording lost PDCP PDUs by rearranging the order, and reporting the status of lost PDCP PDUs It may include a function of performing the transmission side, and may include a function of requesting retransmission of lost PDCP PDUs.

The main functions of the NR RLC (1d-10, 1d-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 function

-Protocol error detection

-RLC SDU deletion function (RLC SDU discard)

-RLC re-establishment

In the above, the in-sequence delivery of the NR RLC device refers to a function of sequentially transmitting RLC SDUs received from a lower layer to an upper layer, and one RLC SDU is originally divided into multiple RLC SDUs and received. If it is, it may include a function to reassemble and deliver it, and may include a function to rearrange the received RLC PDUs based on RLC sequence number (SN) or PDCP sequence number (SN). It may include a function of recording lost RLC PDUs, may include a function of reporting a status of lost RLC PDUs to a transmitting side, and a function of requesting retransmission of lost RLC PDUs. If there is a lost RLC SDU, it may include a function of forwarding only the RLC SDUs up to the previous layer in order until the lost RLC SDU, or if a predetermined timer expires even if there is a lost RLC SDU It may include a function of delivering all RLC SDUs received before the start to the upper layer in order, or if a predetermined timer expires even if there is a missing RLC SDU, all RLC SDUs received so far to the upper layer in order. It can include the ability to deliver. In addition, RLC PDUs may be processed in the order in which they are received (regardless of the order of serial number and sequence number, in the order of arrival) and delivered to the PDCP device regardless of the order (Out-of sequence delivery). Segments stored in a buffer or to be received in the future may be received, reconstructed into one complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and the function may be performed in the NR MAC layer or replaced with a multiplexing function of the NR MAC layer.

In the above, the out-of-sequence delivery function of the NR RLC device refers to the function of directly delivering RLC SDUs received from the lower layer to the upper layer regardless of the order, and originally, one RLC SDU is When received by being divided into SDUs, it may include a function of reassembling and transmitting them, and includes a function of storing the RLC SN or PDCP SN of the received RLC PDUs, sorting the order, and recording the lost RLC PDUs. I can.

NR MAC (1d-15, 1d-30) may be connected to several NR RLC layer devices configured in one terminal, the main function of the NR MAC may include some of the following functions.

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

-Multiplexing/demultiplexing of MAC SDUs

-Scheduling information reporting function

-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 (1d-20, 1d-25) channel-codes and modulates upper layer data, makes it an OFDM symbol and transmits it to a radio channel, or demodulates and decodes an OFDM symbol received through a radio channel to a higher layer. You can perform the transfer operation.

In the LTE system, the UE performs a frequency measurement while performing a cell reselection procedure in an RRC idle mode. In the above, the frequency measured while performing the cell reselection procedure is an intra-frequency measurement or a serving cell or Pcell measurement for frequencies set by the base station or broadcasted by a camp-on cell. It can mean. However, inter-frequency measurement is not performed except for intra-frequency measurement or serving cell measurement, and the frequency measurement result is not separately reported to the network.

That is, when the terminal first performs a cell reselection procedure to find a suitable cell and camps on, and then performs the RRC connection setup procedure to transition to the RRC connection mode, the base station tells the RRC connection mode terminal what frequencies ( For example, frequency list) or what frequency bands to measure, in what order to measure by setting the priority for each frequency, and how to measure the intensity of frequency when measuring frequency (e.g. For example, L1 filtering, L2 filtering, L3 filtering method, or which coefficient is used, which calculation method is used, etc.), when measuring frequency, depending on which event or condition to start measurement, the current serving cell (or the current When compared to the frequency you are camping on), how will the measurement be performed, the frequency results measured according to what event or condition will be reported, and the current serving cell (or the frequency you are currently camping on). It is possible to set whether to report the frequency only when a standard or condition is satisfied, or to report the frequency measurement result at any period. The terminal measures the frequencies according to the frequency setting set by the base station as described above, and reports the frequency measurement results to the base station according to the event or condition. In addition, the base station may determine whether to apply a frequency aggregation technology (Carrier aggregation) or dual connectivity technology (dual connectivity) to the terminal by using the frequency measurement result received from the terminal.

In the present invention, in a next-generation mobile communication system, a frequency measurement is performed in an RRC idle mode or an RRC inactive mode before the UE transitions to an RRC connected mode, and the measurement result is When the terminal establishes a connection with the network, it instructs the base station, and proposes a method for quickly reporting the frequency measurement result by entering the RRC connected mode. Based on the above method, the base station enables the terminal to quickly set the frequency aggregation technology or the dual access technology to the terminal based on the measurement result in the RRC idle mode or the RRC inactive mode.

Specifically, when the base station transitions the RRC connected mode terminal that has established a connection with the network to the RRC idle mode or RRC deactivation mode, the terminal uses an RRC message to measure frequency information or the frequencies to be measured in the RRC idle mode or RRC deactivation mode. In mode or RRC deactivation mode, time (or period) information or frequencies to be measured by the terminal in RRC idle mode or RRC deactivation mode set region information (or cell list) to be measured by the terminal, and the terminal sets the RRC idle mode or RRC It can be instructed to perform frequency measurements in the inactive mode. In addition, the UE reads the system information of the newly camped cell while performing a cell reselection operation every time it moves, and determines whether to continue or end the frequency measurement in the RRC idle mode or RRC inactive mode, or the measurement period according to the system information. The present invention proposes an efficient terminal operation so that a procedure such as whether to extend (for example, restart a timer), report a frequency measurement result, or discard the frequency measurement result, can be performed.

In the present invention, a bearer may mean including SRB and DRB, SRB means Signaling Radio Bearer, and DRB means Data Radio Bearer. In addition, UM DRB refers to a DRB using an RLC layer device operating in an UM (Unacknowledged Mode) mode, and AM DRB refers to a DRB using an RLC layer device operating in an AM (Acknowledged Mode) mode.

1E is a procedure for a UE to switch from an RRC idle mode or an RRC inactive mode to an RRC connected mode and set a carrier aggregation technology in the next-generation mobile communication system of the present invention. It is a figure shown.

In FIG. 1E, the base station may transition the UE to the RRC idle mode or the RRC deactivation mode for a predetermined reason from the RRC connected mode UE that has established a connection with the network. In the above, the predetermined reason may be a shortage of scheduling resources of the base station or a suspension of data transmission/reception with the terminal for a predetermined time.

In the above, the base station may transmit an RRCRelease message to the terminal to instruct the terminal to transition to an RRC idle mode or an RRC deactivation mode. In the above, the RRCRelease message can instruct the terminal to transition to the RRC deactivation mode with an indicator (suspend-config), and if the indicator (suspend-config) is not included in the RRCRelease message, the terminal can transition to the RRC idle mode. (1e-05).

When the terminal transitions to the RRC idle mode or RRC deactivation mode, if connection with the network is required for a predetermined reason, it performs a random access procedure, receives a random access response, requests RRC connection setup, and receives an RRC message to establish an RRC connection. Can be performed (1e-10, 1e-15, 1e-20, 1e-25, 1e-30, 1e-35, 1e-40).

The terminal establishes uplink transmission synchronization with the base station through a random access process and transmits an RRCSetupRequest message to the base station (1e-25). The RRCSetupRequest message may include an identifier of the terminal and a reason for establishing a connection (establishmentCause).

The base station transmits an RRCSetup message so that the terminal establishes an RRC connection (1e-30). The RRCSetup message may include at least one of configuration information for each logical channel, configuration information for each bearer, configuration information for a PDCP layer device, configuration information for an RLC layer device, and configuration information for a MAC layer device.

In the RRCSetup message, a bearer identifier (for example, an SRB identifier or a DRB identifier) is assigned to each bearer, and a PDCP layer device, an RLC layer device, a MAC layer device, and a PHY layer device can be configured for each bearer. In addition, in the RRCConnectionSetup message, the length of the PDCP serial number used by the PDCP layer device (for example, 12 bits or 18 bits) can be set for each bearer, and the length of the RLC serial number used by the RLC layer device (for example, 6 bits or 12 bits or 18 bits) can be set. In addition, in the RRCConnectionSetup message, for each bearer, whether to use a header compression and decompression protocol in an uplink or a downlink can be indicated to the PDCP layer device, and whether to perform an integrity protection or verification procedure can be indicated. In addition, the PDCP layer device may indicate whether to perform out-of-order delivery.

The terminal that has established the RRC connection transmits an RRCSetupComplete message to the base station (1e-40). The RRCSetupComplete message may include a control message called SERVICE REQUEST requesting the AMF or MME to set up a bearer for a predetermined service by the UE. The base station may transmit the SERVICE REQUEST message contained in the RRCConnetionSetupComplete message to the AMF or MME, and the AMF or MME may determine whether to provide the service requested by the UE.

As a result of the determination, if the terminal decides to provide the requested service, the AMF or MME transmits an INITIAL CONTEXT SETUP REQUEST message to the base station. The INITIAL CONTEXT SETUP REQUEST message may include information such as QoS (Quality of Service) information to be applied when setting up a Data Radio Bearer (DRB), and security-related information (e.g., Security Key, Security Algorithm) to be applied to the DRB.

The base station transmits and receives a SecurityModeCommand message and a SecurityModeComplete message to configure security with the terminal, and when security configuration is completed, the base station transmits an RRCConnectionReconfiguration message to the terminal (1e-45).

In the RRCConnectionReconfiguration message, a bearer identifier (for example, an SRB identifier or a DRB identifier) is allocated to each bearer, and a PDCP layer device, an RLC layer device, a MAC layer device, and a PHY layer device can be configured for each bearer. In addition, in the RRCConnectionReconfiguration message, the length of the PDCP serial number used by the PDCP layer device (for example, 12 bits or 18 bits) can be set for each bearer, and the length of the RLC serial number used by the RLC layer device (for example, 6 bits or 12 bits or 18 bits) can be set. In addition, in the RRCConnectionSetup message, for each bearer, whether to use a header compression and decompression protocol in an uplink or a downlink can be indicated to the PDCP layer device, and whether to perform an integrity protection or verification procedure can be indicated. In addition, the PDCP layer device may indicate whether to perform out-of-order delivery.

In addition, the RRCConnectionReconfiguration message may include configuration information of the DRB in which user data is to be processed, and the terminal applies the information to configure the DRB and transmits an RRCConnectionReconfigurationComplete message to the base station (1e-45). After completing DRB setup with the UE, the base station may transmit an INITIAL CONTEXT SETUP COMPLETE message to the AMF or MME and complete the connection (1e-50).

When all of the above processes are completed, the terminal transmits and receives data through the base station and the core network (1e-55, 1e-60). According to some embodiments, the data transmission process is largely composed of three steps of RRC connection setup, security setup, and DRB setup. In addition, the base station may transmit an RRC Connection Reconfiguration message to the terminal for a predetermined reason to refresh, add, or change the configuration (1e-65).

In the RRCConnectionReconfiguration message, frequency setting information to be measured by the UE (e.g., a list of frequencies to be measured, a period to measure a frequency, a condition to measure a frequency, or a condition to report a frequency after a frequency side, a frequency) Cell identifiers, etc.) can be set.

According to the frequency measurement setting information, the terminal performs frequency measurement and, when a predetermined condition is satisfied (for example, when the signal strength of a specific frequency is better than a certain reference (eg, a threshold value) or the current serving cell (frequency)) When the signal strength of is less than a certain reference (for example, a threshold value), the frequency measurement result measured above may be reported to the base station (1e-60).

When the base station receives the frequency measurement result, the base station can set the carrier aggregation technology to the terminal by setting an additional Scell by putting Scell configuration information in the RRCReconfiguration message (1e-65) based on the frequency measurement result and transmitting it to the terminal, and the RRCReconfiguration In the message 1e-65, the secondary cell group setting information is inserted and transmitted to the terminal to set the dual access technology to the terminal.

When the base station has set the carrier aggregation technology to the terminal in the above, the base station can activate, deactivate, or transition to the dormant state of the Scells set above by using a MAC CE (MAC Control Element).

The procedure for the base station to set the carrier aggregation technology or the dual access technology to the terminal as described above can be summarized as follows. First, when the terminal establishes a connection with the base station and the base station sets frequency measurement configuration information to the terminal, the terminal performs frequency measurement based on the frequency measurement configuration information and reports the measurement result to the base station. In addition, the base station may set additional Scell configuration information as an RRC message to set the carrier aggregation technology to the terminal based on the frequency measurement result of the terminal, and send MAC CE to activate, dormant or deactivate the Scells. . In addition, the base station may set additional cell group (Sceondary cell group) configuration information to set the dual access technology to the terminal based on the frequency measurement result of the terminal.

As described above, when the base station sets the carrier aggregation technology or the dual access technology to the terminal, the terminal first enters the RRC connection mode to receive the frequency setting information, and the terminal performs the frequency measurement, so the measurement report is performed very late. As a result, there is a problem that the carrier aggregation technology or the dual access technology must be set late. Therefore, in order to improve this, in the following of the present invention, the terminal efficiently performs frequency measurement in the RRC idle mode and immediately reports the frequency measurement result when a connection with the network is established.

FIG. 1F shows that in the next-generation mobile communication system of the present invention, a terminal enables early measurement of a frequency in an RRC idle mode or an RRC deactivation mode, and a fast measurement report. It is a diagram showing the first embodiment.

In the first embodiment of the present invention, a plurality of frequency measurement groups can be set when the base station sets the frequency measurement configuration information for the terminal to perform frequency measurement in an RRC idle mode or an RRC inactive mode with an RRCRelease message to the terminal. do.

For example, a first LTE frequency group and a second LTE frequency group are set, and the UE performs frequency measurement for each of the two groups in RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first LTE frequency group and frequencies with the best signal within the second LTE frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Accordingly, as the base station efficiently configures a plurality of frequency groups, it is possible to quickly set up a carrier aggregation technology or a dual access technology (for example, LTE DC) based on a frequency measurement report for each group of the terminal.

For example, a first LTE frequency group and a second NR frequency group are set, and the UE performs frequency measurements for each of the two groups in the RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first LTE frequency group and frequencies with the best signal within the second NR frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Therefore, as the base station efficiently configures a plurality of frequency groups, carrier aggregation technology or dual access technology (e.g. EN-DC or NE-DC (for example, EN-DC or NE-DC) Dual connection)) can be set quickly.

For example, a first NR frequency group and a second NR frequency group are set, and the UE performs frequency measurements for each of the two groups in the RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first NR frequency group and frequencies with the best signal within the second NR frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Therefore, as the base station efficiently sets up a plurality of frequency groups, carrier aggregation technology or dual access technology (e.g. NR-DC (dual access between NR base station and NR base station)) based on the frequency measurement report for each group of the terminal Can be set quickly.

In the first embodiment, a terminal capable of performing frequency measurement in an RRC idle mode or an RRC inactive mode and quickly reporting a frequency measurement result may be a terminal corresponding to one or more of the following cases.

1. All terminals that support the fast frequency measurement and reporting method of the fast frequency measurement result in the RRC idle mode or RRC inactive mode of the terminal capability

2. Among the RRC idle mode or inactive mode UE, when the base station transitions the UE from the RRC connected mode to the RRC idle mode or RRC inactive mode with an RRC message, setting information instructing to measure the frequency in the RRC idle mode or the RRC inactive mode is provided. Received terminal. For example, in RRC idle mode or RRC inactive mode, set frequency setting information or measurement period (for example, a timer value) to perform frequency measurement, or region setting information (for example, a list of cell identifiers) to perform the frequency measurement. Terminal

In Figure 1f, the terminal 1f-05 in the RRC connected mode is an RRC idle mode (RRC idle mode) or an RRC inactive mode (RRC) by the base station for a predetermined reason (for example, because there is no data transmission or reception for a certain period of time). inactive mode) mode can be switched (1f-15). In the above, when the base station transitions the mode of the terminal, it sends an RRC message (1f-10). For example, an RRCRelease message (transition instruction to RRC idle mode) or an RRCRelease message including suspend-config (transition instruction to RRC deactivation mode) may be transmitted. The RRC message may include a plurality of the following pieces of information to be applied when the UE performs early measurement in the RRC idle mode or the RRC deactivation mode.

-Frequency setting information to be measured in RRC idle mode or RRC inactive mode

* 주파수 설정 정보

* Frequency setting information

** LTE 주파수 측정 정보 그룹 또는 리스트(EUTRA frequency configuration information/list/group)

** LTE frequency measurement information group or list (EUTRA frequency configuration information/list/group)

*** 어떤 주파수들 혹은 어떤 주파수 밴드들을 측정할 것인지(예를 들면 주파수 리스트), 각 주파수 별 우선순위를 설정해주어 어떤 순서로 측정을 할 것인지, 주파수를 측정할 때 주파수의 세기를 어떤 필터링 방법으로 측정할 것인지(예를 들면 L1 필터링, L2 필터링, L3 필터링 방법, 혹은 어떤 계수를 이용하여, 어떤 계산 방법으로 측정할 것인지 등), 주파수를 측정할 때 어떤 이벤트 혹은 조건에 따라서 측정을 시작할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준(예를 들면 신호의 세기가 지시해준 문턱치 값 이상일 때)으로 측정 및 보고를 할 것인지, 어떤 이벤트 혹은 조건에 따라서 측정한 주파수 결과를 보고할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준 혹은 조건을 만족해야 주파수를 보고할 것인지, 어떤 주기마다 주파수 측정 결과를 보고할 것인지 등의 주파수 측정 설정 정보(early measurement setup)를 포함하여 설정해줄 수 있다.

*** Which frequencies or frequency bands to measure (for example, frequency list), how to measure the order by setting the priority for each frequency, and how to filter the strength of the frequency when measuring frequency Whether to measure by using (e.g., L1 filtering, L2 filtering, L3 filtering method, or which coefficient to measure, by which calculation method, etc.), and according to which event or condition to start measurement when measuring frequency , When compared with the current serving cell (or the frequency currently camped on), the measurement and report will be performed with what criteria (e.g., when the signal strength is greater than the indicated threshold), and measured according to the event or condition. Frequency measurement such as whether to report the frequency result, what criteria or conditions should be satisfied when compared with the current serving cell (or the frequency currently camping), and whether to report the frequency measurement result at any period It can be set including early measurement setup.

** NR 주파수 측정 정보 그룹 또는 리스트(NR frequency configuration information/list/group)

** NR frequency measurement information group or list (NR frequency configuration information/list/group)

*** 어떤 주파수들 혹은 어떤 주파수 밴드들을 측정할 것인지(예를 들면 주파수 리스트), 또는 각 주파수의 SSB 식별자 정보 또는 SSB 전송 자원(주파수와 시간 자원) 또는 각 주파수 별(또는 SSB 별) 우선순위를 설정해주어 어떤 순서로 측정을 할 것인지, 주파수를 측정할 때 주파수의 세기를 어떤 필터링 방법으로 측정할 것인지(예를 들면 L1 필터링, L2 필터링, L3 필터링 방법, 혹은 어떤 계수를 이용하여, 어떤 계산 방법으로 측정할 것인지 등), 주파수를 측정할 때 어떤 이벤트 혹은 조건에 따라서 측정을 시작할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준(예를 들면 신호의 세기가 지시해준 문턱치 값 이상일 때)으로 측정 및 보고를 할 것인지, 어떤 이벤트 혹은 조건에 따라서 측정한 주파수 결과를 보고할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준 혹은 조건을 만족해야 주파수를 보고할 것인지, 어떤 주기마다 주파수 측정 결과를 보고할 것인지 등의 주파수 측정 설정 정보(early measurement setup)를 포함하여 설정해줄 수 있다.

*** Which frequencies or frequency bands to measure (e.g., frequency list), SSB identifier information of each frequency or SSB transmission resource (frequency and time resource) or priority for each frequency (or SSB) How to measure the frequency by setting and in what order, and how to measure the intensity of the frequency when measuring the frequency (e.g., L1 filtering, L2 filtering, L3 filtering method, or using some coefficient, what calculation Method, etc.), according to which event or condition to start measurement when measuring the frequency, and what criteria (e.g., the strength of the signal) when compared to the current serving cell (or the frequency currently camping on). When the frequency is higher than the indicated threshold value), whether to report the measured frequency result according to an event or condition, and what criteria or condition when compared to the current serving cell (or the frequency currently camped on) The frequency measurement setup information (early measurement setup), such as whether to report the frequency or report the frequency measurement result at any period, can be set when satisfied.

* RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 기간 또는 주파수 측정을 수행할 타이머 값(예를 들면 T331), 예를 들면 상기에서 RRCRelease에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 지시한 경우, 타이머를 시작하여 타이머가 구동되는 동안 주파수 측정을 수행할 수 있으며, 타이머가 만료되면 주파수 측정을 중지할 수 있다.

* A period for performing frequency measurement in RRC idle mode or RRC inactive mode or timer value for performing frequency measurement (for example, T331), for example, instructing frequency measurement in RRC idle mode or RRC inactive mode in RRCRelease above. In this case, the timer may be started to perform frequency measurement while the timer is running, and when the timer expires, the frequency measurement may be stopped.

* RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 영역 정보. 예를 들면 물리적 셀 식별자들(PCID)의 리스트를 지시하여 단말이 만약에 상기 영역 정보에서 지시하는 셀에 있는 경우, 주파수 측정을 수행하고, 상기 영역 정보를 벗어난 경우, 상기 주파수 측정을 중단할 수 있다. 예를 들면 상기 영역 정보를 벗어난 경우, 상기 타이머를 중지시키고, 주파수 측정을 중단할 수 있다.

* Area information to perform frequency measurement in RRC idle mode or RRC inactive mode. For example, by indicating a list of physical cell identifiers (PCID), if the terminal is in a cell indicated by the region information, frequency measurement is performed, and if the region information is out, the frequency measurement may be stopped. have. For example, when the region information is out of the range, the timer may be stopped and frequency measurement may be stopped.

* 측정 보고 문턱치 값을 설정해주고 설정된 주파수 그룹에서 상기 문턱치 값보다 신호의 세기가 좋은 복수 개의 주파수들을 보고할 수 있다.

* A measurement report threshold value may be set, and a plurality of frequencies having a signal strength greater than the threshold value in the set frequency group may be reported.

In the above, when the UE performs early measurement in the RRC idle mode or the RRC inactive mode, the condition for starting frequency measurement may start when one of the following conditions is satisfied (1f-30).

1.When the UE receives the RRCRelease message, an indicator to perform frequency measurement in the RRC idle mode or RRC inactive mode is included, and the frequency information to be measured and the period to measure the frequency (for example, a timer value) are set, A timer may be started and frequency measurement may be performed according to the frequency information.

2. When the terminal receives the RRCRelease message, an indicator to perform frequency measurement in the RRC idle mode or RRC inactive mode is included, and the period for measuring the frequency (for example, a timer value) is set, but the frequency information to be measured is included If not, the UE may start a timer once and perform frequency measurement according to the frequency information if frequency information to be measured in the RRC idle mode or RRC inactive mode is broadcast in the system information. If the UE moves to another cell, when frequency information to be measured in an RRC idle mode or an RRC deactivation mode is broadcast in the system information of a newly camped cell, frequency measurement may be performed according to the new frequency information.

That is, if frequency measurement configuration information for performing frequency measurement in RRC idle mode or RRC inactive mode is not set in the RRCRelease message, the terminal broadcasts frequency configuration information for frequency measurement in RRC idle mode or RRC inactive mode in system information. In this case, frequency measurement may be performed in an RRC idle mode or an RRC inactive mode based on this. In the above, if the terminal moves and camps on a new cell, the frequency measurement information may be updated with the frequency setting information for frequency measurement in the RC idle mode or the RRC inactive mode broadcast to the new cell, and frequency measurement may be performed again (1f- 12).

However, if frequency measurement setting information to perform frequency measurement in RRC idle mode or RRC deactivation mode is set in the RRCRelease message, the frequency set in the RRCRelease message rather than RRC idle mode or RRC deactivation mode frequency measurement information broadcast in system information You can prioritize and apply measurement setting information and perform frequency measurement. That is, if frequency measurement configuration information for performing frequency measurement in RRC idle mode or RRC deactivation mode is set in the RRCRelease message, the terminal does not reflect, consider, or ignore the frequency configuration information broadcast in the system information.

According to one or more of the above conditions, the UE can start early measurement of frequency. While performing frequency measurement, the UE sends message 3 (for example, RRCSetupRequest or RRCResumeRequest message) to the base station (1f-35), and receives message 4 (for example, RRCSetup or RRCResume message) from the base station in response to this random access. It can be seen that the procedure was successful (1f-40), and it is possible to transition to the RRC connection mode (1f-45).

In the above, in the system information (e.g., SIB2) received before the UE establishes a connection in the current cell, an indicator supporting RRC idle mode or RRC deactivation mode frequency measurement or RRC idle mode or RRC inactive mode frequency measurement result can be received. If it broadcasts an indicator indicating that it is possible, the terminal may inform the base station with message 5 that it has a frequency measurement result measured in the RRC idle mode or the RRC inactive mode. Alternatively, the indicator may define and use an indicator indicating LTE frequency measurement support or NR frequency measurement support, respectively.

When sending message 5 (e.g., RRC Setup Complete or RRC Resume Complete), the UE performed frequency measurement in RRC idle mode or RRC inactive mode, and may transmit, including an indicator that there is a frequency measurement result to be reported. have. In the message 5, a new indicator may be defined to indicate that there is a fast frequency measurement result, and the indicator indicating that there is terminal information already defined in the RRC message (RRC Setup Complete or RRC Resume Complete) can be reused. May be (1f-50).

If the base station confirms with an indicator that the UE has performed a fast frequency measurement in the RRC idle mode or the RRC inactive mode in message 5, and there is a measurement result to report it, a message to report the measurement result in order to quickly report the frequency measurement result ( UEInformationRequest) may be sent to the UE (1f-55). For example, the base station may request frequency measurement result information from the terminal by using a UEinformationRequest in a DL-DCCH message. Upon receiving the message, the terminal can quickly report a fast frequency measurement result to the base station (UEInformationResponse, 1f-65). For example, upon receiving the message, the UE may report a frequency measurement result using a UEInformationResponse message as a UL-DCCH message. In the above, the frequency measurement result is a serving cell/frequency measurement result (e.g., NR-SS RSRP/RSRQ), a neighboring cell/frequency measurement result of the serving cell/frequency, a neighboring cell/frequency measurement result that can be measured by the terminal, It may include the indicated cell/frequency measurement result.

In the above, the condition at which the terminal stops fast frequency measurement may be as follows.

1. After transmitting to the base station that there is a measurement result report in message 5,

2. If the measurement report timer (eg T331) has expired,

3. When the RRC idle mode or RRC deactivation mode set in the RRCRelease message is out of the range indicated by the frequency measurement area information,

According to one or more of the above conditions, the UE may stop RRC idle mode or RRC inactive mode frequency measurement (IDLE mode/INACTIVE mode measurement) (1f-60).

In the above, the terminal performs measurement on frequencies that it can measure, that is, supports it from the fast frequency setting-related information, and at this time, the terminal may select a frequency to perform measurement preferentially according to a predetermined set priority. have.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC deactivation mode, a specific terminal operation when an RRCRelease message is received in the first embodiment is proposed as follows.

-When the terminal receives the RRCRelease message

* 만약 상기 RRCRelease 메시지가 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수를 측정할 설정 정보(measIdleConfig)가 포함되어 있다면

* If the RRCRelease message contains configuration information (measIdleConfig) to measure frequency in RRC idle mode or RRC inactive mode

** 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수와 측정 결과를 저장하는 단말 내부 변수를 초기화하고 비운다(clear)

** The terminal initializes and clears the terminal internal variable that stores the RRC idle mode or the RRC inactive mode frequency measurement configuration information and the terminal internal variable that stores the measurement result.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파 측정 설정 정보에 포함된 측정 기간(또는 타이머값, measureDuration)를 상기 측정 설정 정보를 저장하는 단말 내부 변수(VarMeasIdleConfig)에 저장한다.

** And the terminal stores the measurement period (or timer value, measureDuration) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information in a terminal internal variable (VarMeasIdleConfig) that stores the measurement configuration information.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 포함된 측정 기간(또는 타이머 값)을 설정하여 타이머(예를 들면 T331)를 시작한다.

** And the terminal starts a timer (for example, T331) by setting a measurement period (or a timer value) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The LTE or NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수(예를 들면 VarMeasIdleConfig)에 저장한다.

*** If there is LTE or NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivation mode frequency measurement setting information is stored in a terminal internal variable (for example, VarMeasIdleConfig) that stores information.

**** 구체적으로 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에 있고, 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보(measIdleConfigSIB)가 포함되어 있고, 단말이 캐리어 집적 기술 또는 이중 접속 기술을 위해 상기 주파수 측정을 지원한다면

**** Specifically, the terminal is in the RRC idle mode or RRC deactivated mode, and the RRC idle mode or RRC deactivated mode frequency measurement configuration information (measIdleConfigSIB) is included in the system information (for example, SIB5), and the terminal is carrier aggregation If the frequency measurement is supported for technology or dual access technology

***** 만약 타이머(T331)가 구동 중이고 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 주파수 측정 설정 정보가 없다면

***** If the timer T331 is running and there is no frequency measurement setting information in the terminal internal variable that stores the RRC idle mode or RRC deactivated mode frequency measurement setting information

****** 단말은 상기 시스템 정보에서 수신한 주파수 측정 설정 정보를 업데이트 또는 저장 또는 교체한다.

****** The terminal updates, stores, or replaces the frequency measurement configuration information received from the system information.

****** 그리고 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 시작한다.

****** And the terminal starts the RRC idle mode or RRC inactive mode frequency measurement according to the terminal operation embodiments proposed in the following.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** If there is NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivated mode frequency measurement setting information is stored in a terminal internal variable that stores information.

** 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 시작하고 주파수 측정 결과를 저장하고 보고한다.

** The terminal starts frequency measurement in the RRC idle mode or the RRC deactivation mode according to the terminal operation embodiments proposed in the following, and stores and reports the frequency measurement result.

In the present invention, a method for rapidly performing frequency measurement and reporting in the RRC idle mode or RRC inactive mode in the first embodiment, a specific terminal operation for performing frequency measurement and storing and reporting the measurement result, embodiment 1-2 is described below. I propose like this.

-If a timer (the T331 timer) that allows frequency measurement in the RRC idle mode or the RRC inactive mode is running, the UE operates as follows.

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장된 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListEUTRA)가 있다면 LTE 주파수 측정 리스트 또는 그룹의 각 주파수 정보 또는 각 엔트리에 대해서 단말은 다음과 같이 주파수 측정을 수행한다.

* If there is an LTE frequency measurement list or group information (measIdleCarrierListEUTRA) stored in a terminal internal variable that stores RRC idle mode or RRC deactivation mode frequency measurement setting information, the terminal shall be the following for each frequency information or each entry of the LTE frequency measurement list or group. Perform frequency measurement as follows.

** 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하고, 상기 주파수 정보에서 지시하는 대역폭을 지원한다면

** If the terminal supports a carrier aggregation technology or dual access technology between the current serving frequency and the frequency, and supports the bandwidth indicated by the frequency information

*** 상기 주파수 정보에서 지시하는 주파수와 대역폭에서 주파수 측정을 수행한다.

*** Perform frequency measurement at the frequency and bandwidth indicated by the frequency information.

*** 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트 정보(예를 들면 셀 식별자 리스트 measCellList)가 포함되었다면 또는 설정되었다면

*** If cell identifier list information (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is included or is set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 상기 셀 식별자 리스트에서 지시된 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다.

**** The UE considers the serving cell (or Pcell) and the cells indicated in the cell identifier list as cells capable of measuring an RRC idle mode or an RRC inactive mode frequency.

*** 그렇지 않고, 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트(예를 들면 셀 식별자 리스트 measCellList)가 포함되지 않았다면 또는 설정되지 않았다면

*** Otherwise, if the cell identifier list (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is not included or is not set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 RSRP 또는 RSRQ 측정 결과가 설정된 문턱치값보다 신호의 세기가 크며, 신호의 세기가 가장 강한 몇 개의 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다. 상기에서 가장 강한 몇 개의 셀들을 고를지는 기지국이 설정해줄 수 있다.

**** The terminal measures the frequency of the serving cell (serving cell or Pcell) and the RSRP or RSRQ measurement result in RRC idle mode or RRC inactive mode by measuring some cells with the highest signal strength than the set threshold. Consider these possible cells. The base station can set how many cells to select the strongest cells.

*** 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 단말 내부 변수(예를 들면 VarMeasIdleReport)에 저장한다. 상기에서 측정 결과를 저장할 때 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 또는 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 별로 각각 따로 저장하고 나중에 보고할 수 있다.

*** In the above, the frequency measurement result measured in the RRC idle mode or the RRC inactive mode is stored in an internal variable (eg VarMeasIdleReport). When the measurement result is stored in the above, the NR frequency measurement list or group information (measIdleCarrierListNR) or the LTE frequency measurement list or group information (measIdleCarrierListNR) can be separately stored and reported later.

** 그렇지 않고, 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하지 않거나, 상기 주파수 정보에서 지시하는 대역폭을 지원하지 않는다면

** Otherwise, if the UE does not support a carrier aggregation technology or dual access technology between the current serving carrier and the frequency, or does not support the bandwidth indicated by the frequency information

*** 단말은 상기 주파수 정보에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 고려하지 않고, 주파수 측정을 수행하지 않는다.

*** The terminal does not take into account the RRC idle mode or RRC inactive mode frequency measurement in the frequency information and does not perform the frequency measurement.

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장된 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR)가 있다면 NR 주파수 측정 리스트 또는 그룹의 각 주파수 정보 또는 각 엔트리에 대해서 단말은 다음과 같이 주파수 측정을 수행한다.

* If there is an NR frequency measurement list or group information (measIdleCarrierListNR) stored in a terminal internal variable that stores RRC idle mode or RRC deactivation mode frequency measurement configuration information, the terminal shall be Perform frequency measurement as follows.

** 만약 단말이 현재 서빙 주파수(serving carrier) 또는 SSB와 상기 주파수 또는 SSB와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하고, 상기 주파수 정보 또는 SSB 정보에서 지시하는 대역폭 또는 부분 대역폭(Bandwidth part, BWP)을 지원한다면

** If the terminal currently supports a serving carrier or a carrier aggregation technology or dual access technology between the SSB and the frequency or SSB, and the bandwidth or partial bandwidth indicated by the frequency information or SSB information (Bandwidth part, BWP) If you support

*** 상기 주파수 정보에서 지시하는 주파수와 대역폭 또는 부분 대역폭 또는 SSB(Synchronization System Block, 기지국과 동기화를 맞추기 위한 신호)에서 주파수 측정을 수행한다.

*** Frequency measurement is performed at the frequency and bandwidth or partial bandwidth indicated by the frequency information or SSB (Synchronization System Block, a signal to synchronize with the base station).

*** 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트 정보(예를 들면 셀 식별자 리스트 measCellList)가 포함되었다면 또는 설정되었다면

*** If cell identifier list information (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is included or is set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 상기 셀 식별자 리스트에서 지시된 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다.

**** The UE considers the serving cell (or Pcell) and the cells indicated in the cell identifier list as cells capable of measuring an RRC idle mode or an RRC inactive mode frequency.

*** 그렇지 않고, 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트(예를 들면 셀 식별자 리스트 measCellList)가 포함되지 않았다면 또는 설정되지 않았다면

*** Otherwise, if the cell identifier list (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is not included or is not set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 RSRP 또는 RSRQ 측정 결과가 설정된 문턱치값보다 신호의 세기가 크며, 신호의 세기가 가장 강한 몇 개의 셀들 또는 SSB들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다. 상기에서 가장 강한 몇 개의 셀들을 고를지는 기지국이 설정해줄 수 있다.

**** The terminal has a serving cell (a serving cell or Pcell) and a signal strength greater than a threshold value for which the RSRP or RSRQ measurement result is set, and several cells or SSBs with the strongest signal strength are in RRC idle mode or RRC deactivation mode. Consider cells that can measure frequency. The base station can set how many cells to select the strongest cells.

*** 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 단말 내부 변수(예를 들면 VarMeasIdleReport)에 저장한다. 상기에서 측정 결과를 저장할 때 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 또는 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 별로 각각 따로 저장하고 나중에 보고할 수 있다.

*** In the above, the frequency measurement result measured in the RRC idle mode or the RRC inactive mode is stored in an internal variable (eg VarMeasIdleReport). When the measurement result is stored in the above, the NR frequency measurement list or group information (measIdleCarrierListNR) or the LTE frequency measurement list or group information (measIdleCarrierListNR) can be separately stored and reported later.

** 그렇지 않고, 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하지 않거나, 상기 주파수 정보에서 지시하는 대역폭을 지원하지 않는다면

** Otherwise, if the UE does not support a carrier aggregation technology or dual access technology between the current serving carrier and the frequency, or does not support the bandwidth indicated by the frequency information

*** 단말은 상기 주파수 정보에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 고려하지 않고, 주파수 측정을 수행하지 않는다.

*** The terminal does not take into account the RRC idle mode or RRC inactive mode frequency measurement in the frequency information and does not perform the frequency measurement.

-If area information (for example, validity area) or cell identifier list is set in the terminal internal variable that stores the RRC idle mode or RRC inactive mode frequency measurement configuration information, and the area or cells indicated by the terminal information are If you select or camp on a cell that is not

* 단말은 상기 타이머(T331)를 중지하고, RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 중단한다.

* The terminal stops the timer T331 and stops measuring the RRC idle mode or RRC inactive mode frequency.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC deactivation mode is proposed as follows.

-The terminal operates a timer (T331) for measuring an RRC idle mode or an RRC inactive mode frequency, and the timer performs RRC idle mode or RRC deactivation mode frequency measurement only while the timer is running, and when the timer expires It characterized in that the RRC idle mode or RRC inactive mode frequency measurement is stopped.

-The terminal receives the configuration information for measuring the frequency of the RRC idle mode or RRC inactive mode in the RRC message and starts a timer when the measurement period is set.

-The terminal establishes a connection with the network while performing RRC idle mode or RRC deactivation mode frequency measurement, stops the timer when receiving the RRCSetup message or RRCResume message in message 4, or the area setting information is set, but the terminal is out of the area. You can select and stop the timer when camping on.

-When the timer expires or stops, the terminal releases information of a terminal internal variable (eg, VarMeasIdleConfig) that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC inactive mode is proposed according to embodiments 1-4 of a specific terminal operation reporting a frequency measurement result for the first embodiment as follows.

-When the UE receives the RRCSetup message or the RRCResume message in message 4 from the base station, the following operation may be performed.

* 만약 시스템 정보(예를 들면 SIB2)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 지원한다는 지시자(IDLE or INACTIVE Mode Measurement)를 방송하고 또는 포함하고 있으며, 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 가지고 있다면

* If the system information (for example, SIB2) broadcasts or includes an indicator (IDLE or INACTIVE Mode Measurement) that supports frequency measurement in RRC idle mode or RRC inactive mode, and the terminal is measured in RRC idle mode or RRC inactive mode If you have one frequency measurement result

** 단말은 메시지 5로 RRCSetupComplete 메시지 또는 RRCResumeComplete 메시지에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과가 있다는 지시자(idle or INACTIVE Measavailable)를 포함하여 상기 메시지를 구성한다. 따라서 상기 메시지로 기지국에게 보고할 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 정보가 있다는 것을 지시할 수 있다.

** The terminal configures the message by including an indicator (idle or INACTIVE Measavailable) indicating that there is an RRC idle mode or RRC inactive mode frequency measurement result in the RRCSetupComplete message or the RRCResumeComplete message as message 5. Accordingly, the message may indicate that there is RRC idle mode or RRC inactive mode frequency measurement information to be reported to the base station.

** 주파수 측정 결과를 보고할 것이기 때문에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정에 대한 타이머(예를 들면 T331)를 중지한다.

** Stop the timer for RRC idle mode or RRC deactivated mode frequency measurement (eg T331) because it will report the frequency measurement result.

-The terminal receives a message requesting information of the terminal from the base station (UE information request), in the message there is an indicator requesting the RRC idle mode or RRC deactivation mode frequency measurement result, and the terminal is in RRC idle mode or RRC deactivation mode If you have a frequency measurement result

* 단말은 단말의 정보를 전송하는 메시지(UE information response)에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 포함하여 전송할 수 있으며, 상기 주파수 측정 결과는 기지국의 RRC 메시지 또는 시스템 정보에서 설정해준 주파수 리스트 또는 그룹 단위로 각각 측정 결과를 보고할 수 있다. 예를 들면 LTE 주파수 리스트 그룹과 NR 주파수 리스트 그룹에 대해 각각 측정 결과를 보고할 수 있으며, 제 1의 NR 주파수 리스트 그룹과 제 2의 NR 주파수 리스트 그룹에 대해서 각각 측정 결과를 보고할 수 있다.

* The terminal may transmit the RRC idle mode or RRC deactivation mode frequency measurement result in a message (UE information response) for transmitting the terminal information, and the frequency measurement result is a frequency list set in the RRC message or system information of the base station Alternatively, you can report each measurement result in groups. For example, measurement results may be reported for each of the LTE frequency list group and the NR frequency list group, and the measurement results may be reported for each of the first NR frequency list group and the second NR frequency list group.

* 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 보고하면 단말은 상기 측정 보고를 기지국이 성공적으로 수신하였다는 응답(HARQ ACK 또는 RLC ACK)을 받으면 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 단말 내부 변수에서 폐기할 수 있다.

* If the RRC idle mode or RRC deactivation mode frequency measurement result is reported above, the UE receives a response (HARQ ACK or RLC ACK) indicating that the base station has successfully received the measurement report, the RRC idle mode or RRC deactivation mode frequency measurement result Can be discarded in the terminal internal variable.

In the present invention, the LTE frequency list group or the NR frequency list group may be included in one configuration information and broadcast in the system information (SIB5), and the LTE frequency list group or the NR frequency list group may have different system information (e.g. For example, by broadcasting in SIB3 or SIB5 or other SIB), the terminal can be distinguished. In addition, the LTE frequency list group or the NR frequency list group may include inter-frequency configuration information (inter-frequency) as well as intra-frequency configuration information (intra-frequency).

1G is a diagram illustrating a terminal operation for performing frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention and reporting a measurement result.

In FIG. 1G, when the UE receives an RRC message, it drives a timer for RRC idle mode or RRC deactivation mode frequency measurement, and if there is frequency measurement configuration information for RRC idle mode or RRC deactivation mode frequency measurement in the RRC message (1g-05 ) RRC idle mode or RRC inactive mode frequency measurement is performed based on the information (1g-10). If there is no RRC idle mode or RRC deactivated mode frequency measurement setting information for frequency measurement in the RRC message, the frequency measurement information is received from system information (1g-05) and the RRC idle mode or RRC deactivated mode frequency measurement is performed. Can (1g-10). In addition, the UE stores the measurement result when performing frequency measurement, and if there is an indicator that the RRC idle mode or RRC inactive mode frequency measurement is supported in the system information of the cell establishing the connection with the network, message 4 when establishing the connection with the network Is received, the timer is stopped (1g-15), and message 5 may inform that there is a result of the frequency measurement in the RRC idle mode or the RRC inactive mode. In addition, when the base station requests the RRC idle mode or RRC inactive mode frequency measurement result, the measurement result is reported (1g-20), and when the measurement result is successfully transmitted to the base station, the UE discards the measurement result.

In the above of the present invention, a method of rapidly setting a carrier aggregation technology or a dual access technology to a terminal has been proposed and described. In the following of the present invention, a method of configuring a multiple access technology to a terminal by extending dual connectivity is proposed.

In the present invention, the base station may establish a connection with a plurality of base stations with an RRC message (for example, an RRCSetup message, an RRCResume message, or an RRCReconfiguration message) as shown in FIG. In the above, a plurality of base stations may be set as one or a plurality of LTE base stations and one or a plurality of NR base stations, and a plurality of NR base stations may be set by another method.

In the above, when setting up connection with a plurality of base stations to a terminal through an RRC message, one base station is indicated which base station is a master in the RRC message. In the above, the base station set as the master refers to a base station capable of directly transmitting an RRC message to a terminal through an SRB. In the above, base stations other than the master are characterized in that they can transmit the RRC message through the master base station.

In the above, when the base station sets one LTE base station and a plurality of NR base stations to the mobile station with multiple access technology, if the LTE base station is to be set as the master base station, one base station among the plurality of NR base stations is indicated as the master base station among the NR base stations. It can be characterized by being able to do. That is, in the present invention, it may be characterized in that one master base station can be indicated for each radio access technology (RAT) for a plurality of base stations configured as a multiple access technology. For example, one LTE base station among a plurality of LTE base stations may be set as a master base station, and one NR base station among a plurality of NR base stations may be set as a master base station. In the above, the master LTE base station and the master NR base station may each transmit an RRC message suitable for a radio access technology to the terminal through an independent SRB. In addition, when a plurality of NR base stations are set to the terminal using multiple access technology, one NR base station may be set as the master base station.

In the following of the present invention, a method of implementing a base station that can effectively use the multiple access technology of the present invention is proposed.

In the present invention, when implementing a CU-DU split structure (Central Unit and Distributed Unit Split) in a base station implementation, a low frequency range (FR1, Frequency range 1, for example, a frequency range from 450MHz to 7GHz) is supported for one DU. And, for another DU, it is characterized in that it supports a high frequency range (FR2, Frequency range 2, for example, a frequency range from 24.25GHz to 52.6GHz). That is, it is characterized in that the low frequency domain and the high frequency domain are not simultaneously supported for one DU. Because the frequency characteristics of each of the low and high frequency domains are different, it may be difficult to deploy a base station without a shaded area because the coverage supporting the terminal is different. In addition, when a low frequency domain and a high frequency domain are simultaneously operated in one DU, implementation complexity increases. Therefore, for convenience of implementation, it is proposed not to operate the low frequency domain and the high frequency domain simultaneously in one DU.

In the above, the CU-DU split structure operates a higher layer device (for example, an application layer device or an SDAP layer device or a PDCP layer device) in one CU, and connects a plurality of DUs to the one CU by wire or wirelessly, It refers to operating a lower layer device (for example, an RLC layer device, a MAC layer device, or a PHY layer device) in each of the DUs.

As proposed in the present invention, if one DU is implemented to support only one of a low frequency region or a high frequency region, the multiple access technique proposed in the present invention can be efficiently used. That is, since each DU supports only one of a low frequency domain or a high frequency domain, the complexity of implementation is reduced and the freedom of deployment of the base station is improved. In addition, by using the multiple access technique proposed in the present invention, it is possible to simultaneously support a single terminal in a low frequency domain and a high frequency domain. That is, the terminal can simultaneously connect to multiple DUs (or base stations, for example, low frequency domain support DU and high frequency domain support DU) with multiple access technology so that the terminal can service low delay and high data rate. You can set it to be able to. Accordingly, the base station can provide a service to the terminal by utilizing both the high frequency domain and the low frequency domain, and the carrier aggregation technique, dual access technique, or multiple access technique described above can be efficiently applied. That is, when one CU and two DUs (DU1 supports the low frequency domain and DU2 supports the high frequency domain) are considered as one base station, the high frequency domain and the low frequency domain are one UE using the carrier aggregation technology. If one CU and two DUs (DU1 supports the low frequency domain and DU2 supports the high frequency domain) are regarded as two base stations, the high frequency domain and the low frequency domain are used by using dual access technology. The region can be simultaneously serviced to one terminal, and multiple access technology can be applied to a plurality of DUs.

1H shows the structure of a terminal to which an embodiment of the present invention can be applied.

Referring to the drawing, the terminal includes a radio frequency (RF) processing unit 1h-10, a baseband processing unit 1h-20, a storage unit 1h-30, and a control unit 1h-40. .

The RF processing unit 1h-10 performs a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processing unit 1h-10 up-converts the baseband signal provided from the baseband processing unit 1h-20 to an RF band signal and transmits it through an antenna, and the RF band signal received through the antenna Is down-converted to a baseband signal. For example, the RF processing unit 1h-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), and the like. I can. In the figure, only one antenna is shown, but the terminal may have multiple antennas. In addition, the RF processing unit 1h-10 may include a plurality of RF chains. Furthermore, the RF processing unit 1h-10 may perform beamforming. For the beamforming, the RF processing unit 1h-10 may adjust a phase and a magnitude of signals transmitted and received through a plurality of antennas or antenna elements. In addition, the RF processor may perform MIMO, and may receive multiple layers when performing MIMO operations. The RF processing unit 1h-10 may perform reception beam sweeping by appropriately setting a plurality of antennas or antenna elements under the control of the controller, or adjust the direction and beam width of the reception beam so that the reception beam cooperates with the transmission beam. have.

The baseband processing unit 1h-20 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when transmitting data, the baseband processing unit 1h-20 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit 1h-20 restores a received bit stream through demodulation and decoding of the baseband signal provided from the RF processing unit 1h-10. For example, in the case of the OFDM (orthogonal frequency division multiplexing) method, when transmitting data, the baseband processing unit 1h-20 generates complex symbols by encoding and modulating a transmission bit stream, and subcarriers of the complex symbols After mapping to, OFDM symbols are constructed through an inverse fast Fourier transform (IFFT) operation and a cyclic prefix (CP) insertion. In addition, when receiving data, the baseband processing unit 1h-20 divides the baseband signal provided from the RF processing unit 1h-10 in units of OFDM symbols, and applies a fast Fourier transform (FFT) operation to subcarriers. After reconstructing the mapped signals, the received bit stream is restored through demodulation and decoding.

The baseband processing unit 1h-20 and the RF processing unit 1h-10 transmit and receive signals as described above. Accordingly, the baseband processing unit 1h-20 and the RF processing unit 1h-10 may be referred to as a transmission unit, a reception unit, a transmission/reception unit, or a communication unit. Furthermore, at least one of the baseband processing unit 1h-20 and the RF processing unit 1h-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 1h-20 and the RF processing unit 1h-10 may include different communication modules to process signals of different frequency bands. For example, the different radio access technologies may include LTE networks, NR networks, and the like. Also, the different frequency bands may include a super high frequency (SHF) band (eg, 2.5 GHz, 5 Ghz), and a millimeter wave (eg, 60 GHz) band.

The storage unit 1h-30 stores data such as a basic program, an application program, and setting information for the operation of the terminal. The storage unit 1h-30 provides stored data at the request of the control unit 1h-40.

The controller 1h-40 controls overall operations of the terminal. For example, the control unit 1h-40 transmits and receives signals through the baseband processing unit 1h-20 and the RF processing unit 1h-10. In addition, the control unit 1h-40 writes and reads data in the storage unit 1h-40. To this end, the control unit 1h-40 may include at least one processor. For example, the control unit 1h-40 may include a communication processor (CP) that controls communication and an application processor (AP) that controls an upper layer such as an application program.

1I shows a block configuration of a TRP in a wireless communication system to which an embodiment of the present invention can be applied.

As shown in the figure, the base station includes an RF processing unit 1i-10, a baseband processing unit 1i-20, a backhaul communication unit 1i-30, a storage unit 1i-40, and a control unit 1i-50. Consists of including.

The RF processing unit 1i-10 performs a function of transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processing unit 1i-10 up-converts the baseband signal provided from the baseband processing unit 1i-20 to an RF band signal and transmits it through an antenna, and the RF band signal received through the antenna Downconverts to a baseband signal. For example, the RF processing unit 1i-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. In the figure, only one antenna is shown, but the first access node may include multiple antennas. In addition, the RF processing unit 1i-10 may include a plurality of RF chains. Furthermore, the RF processing unit 1i-10 may perform beamforming. For the beamforming, the RF processing unit 1i-10 may adjust a phase and a magnitude of each of 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 1i-20 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the first wireless access technology. For example, when transmitting data, the baseband processing unit 1i-20 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit 1i-20 restores a received bit stream through demodulation and decoding of the baseband signal provided from the RF processing unit 1i-10. For example, in the case of the OFDM scheme, when transmitting data, the baseband processing unit 1i-20 generates complex symbols by encoding and modulating a transmission bit stream, mapping the complex symbols to subcarriers, and then IFFT OFDM symbols are configured through calculation and CP insertion. In addition, when receiving data, the baseband processing unit 1i-20 divides the baseband signal provided from the RF processing unit 1i-10 in units of OFDM symbols, and reconstructs signals mapped to subcarriers through FFT operation. After that, the received bit stream is restored through demodulation and decoding. The baseband processing unit 1i-20 and the RF processing unit 1i-10 transmit and receive signals as described above. Accordingly, the baseband processing unit 1i-20 and the RF processing unit 1i-10 may be referred to as a transmission unit, a reception unit, a transmission/reception unit, a communication unit, or a wireless communication unit.

The communication unit 1i-30 provides an interface for performing communication with other nodes in the network.

The storage unit 1i-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 1i-40 may store information on bearers allocated to the connected terminal and measurement results reported from the connected terminal. In addition, the storage unit 1i-40 may store information that is a criterion for determining whether to provide multiple connections to the terminal or to stop. In addition, the storage unit 1i-40 provides stored data according to the request of the control unit 1i-50.

The control unit 1i-50 controls overall operations of the main station. For example, the control unit 1i-50 transmits and receives signals through the baseband processing unit 1i-20 and the RF processing unit 1i-10 or through the backhaul communication unit 1i-30. In addition, the control unit 1i-50 writes and reads data in the storage unit 1i-40. To this end, the control unit 1i-50 may include at least one processor.

<Second Example>

2A is a diagram showing the structure of an LTE system to which the present invention can be applied.

Referring to Figure 2a, the radio access network of the LTE system as shown in the next generation base station (Evolved Node B, hereinafter referred to as ENB, Node B or base station) (2a-05, 2a-10, 2a-15, 2a-20) It consists of MME (2a-25, Mobility Management Entity) and S-GW (2a-30, Serving-Gateway). User equipment (hereinafter referred to as UE or UE) 2a-35 accesses an external network through ENBs 2a-05 to 2a-20 and S-GW 2a-30.

In FIG. 2A, ENBs 2a-05 to 2a-20 correspond to existing Node Bs of the UMTS system. The ENB is connected to the UE (2a-35) through a radio channel and performs a more complicated 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, are serviced through a shared channel, so status information such as buffer status of UEs, available transmission power status, channel status, etc. It is necessary to have a device that collects and schedules scheduling, and ENB (2a-05 to 2a-20) is responsible for this. One ENB usually controls multiple cells. For example, in order to realize a transmission speed of 100 Mbps, the LTE system uses, for example, an orthogonal frequency division multiplexing (OFDM) in a 20 MHz bandwidth as a radio access technology. In addition, an adaptive modulation & coding (hereinafter referred to as AMC) method is applied to determine a modulation scheme and a channel coding rate according to a channel state of a terminal. The S-GW 2a-30 is a device that provides a data bearer, and creates or removes a data bearer under the control of the MME 2a-25. The MME is a device responsible for various control functions as well as mobility management functions for a terminal, and is connected to a number of base stations.

2B is a diagram showing a radio protocol structure in an LTE system to which the present invention can be applied.

Referring to Figure 2b, the radio protocol of the LTE system is the PDCP (Packet Data Convergence Protocol 2b-05, 2b-40), RLC (Radio Link Control 2b-10, 2b-35), MAC (Medium Access) in the terminal and the ENB, respectively. Control 2b-15, 2b-30). PDCP (Packet Data Convergence Protocol) (2b-05, 2b-40) is responsible for IP header compression/restore. The main functions of PDCP are summarized as follows.

-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

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

Radio link control (hereinafter referred to as RLC) (2b-10, 2b-35) reconfigures the PDCP packet data unit (PDU) to an appropriate size to perform ARQ operation and the like. The main functions of RLC are 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)

-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

The MACs 2b-15 and 2b-30 are connected to several RLC layer devices configured in one UE, and perform an operation of multiplexing RLC PDUs to MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. The main functions of MAC are 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

-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 physical layer (2b-20, 2b-25) channel-codes and modulates the upper layer data, makes it an OFDM symbol and transmits it to the radio channel, or demodulates and decodes the OFDM symbol received through the radio channel and delivers it to the upper layer. Do the action.

2C is a diagram showing the structure of a next-generation mobile communication system to which the present invention can be applied.

Referring to FIG. 2C, a radio access network of a next generation mobile communication system (hereinafter referred to as NR or 5G) is a next generation base station (New Radio Node B, NR gNB or NR base station) 2c-10 and NR CN (2c). -05, New Radio Core Network). The user terminal (New Radio User Equipment, NR UE or terminal) 2c-15 connects to the external network through the NR gNB 2c-10 and the NR CN 2c-05.

In FIG. 2C, NR gNB 2c-10 corresponds to an evolved node B (eNB) of an existing LTE system. The NR gNB is connected to the NR UE (2c-15) through a radio channel and can provide superior service than the existing Node B. In the next-generation mobile communication system, since all user traffic is serviced through a shared channel, a device is required to collect and schedule status information such as buffer status of UEs, available transmission power status, and channel status, and this is NR NB (2c-10) is in charge. One NR gNB usually controls multiple cells. In order to implement ultra-high-speed data transmission compared to the current LTE, it may have more than the existing maximum bandwidth, and orthogonal frequency division multiplexing (hereinafter referred to as OFDM) as a wireless access technology may additionally incorporate beamforming technology. . In addition, an adaptive modulation & coding (hereinafter referred to as AMC) method is applied to determine a modulation scheme and a channel coding rate according to a channel state of a terminal. The NR CN (2c-05) performs functions such as mobility support, bearer setup, and QoS setup. The NR CN is a device responsible for various control functions as well as mobility management functions for a terminal, and is connected to a plurality of base stations. In addition, the next generation mobile communication system can be linked with the existing LTE system, and the NR CN is connected to the MME (2c-25) through a network interface. MME is connected to the existing base station eNB (2c-30).

2D is a diagram illustrating a radio protocol structure of a next-generation mobile communication system to which the present invention can be applied. .

Referring to Figure 2d, the radio protocol of the next-generation mobile communication system is NR SDAP (2d-01, 2d-45), NR PDCP (2d-05, 2d-40), NR RLC (2d-10) at the terminal and the NR base station, respectively. , 2d-35), NR MAC (2d-15, 2d-30).

The main functions of NR SDAP (2d-01, 2d-45) may include some of the following functions.

-Transfer of user plane data

-Mapping function between 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 for both uplink and downlink (marking QoS flow ID in both DL and UL packets)

-Reflective QoS flow to DRB mapping for the UL SDAP PDUs for uplink SDAP PDUs.

For the SDAP layer device, the UE can set whether to use the header of the SDAP layer device or the function of the SDAP layer device, for each PDCP layer device, for each bearer, or for each logical channel, as an RRC message, and the SDAP header When is set, the NAS QoS reflection setting 1-bit indicator (NAS reflective QoS) of the SDAP header and the AS QoS reflection setting 1-bit indicator (AS reflective QoS) allow the UE to map the uplink and downlink QoS flow and mapping information for the data bearer. You can instruct it to update or reset. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used as data processing priority and scheduling information to support a smooth service.

The main functions of NR PDCP (2d-05, 2d-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

-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, the order reordering function of the NR PDCP device refers to a function of rearranging the PDCP PDUs received from the lower layer in order based on the PDCP sequence number (SN), and the function of delivering data to the upper layer in the rearranged order. It may include, or may include a function of immediately delivering without considering the order, may include a function of recording lost PDCP PDUs by rearranging the order, and reporting the status of lost PDCP PDUs It may include a function of performing the transmission side, and may include a function of requesting retransmission of lost PDCP PDUs.

The main functions of the NR RLC (2d-10, 2d-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 function

-Protocol error detection

-RLC SDU deletion function (RLC SDU discard)

-RLC re-establishment

In the above, the in-sequence delivery of the NR RLC device refers to a function of sequentially transmitting RLC SDUs received from a lower layer to an upper layer, and one RLC SDU is originally divided into multiple RLC SDUs and received. If it is, it may include a function to reassemble and deliver it, and may include a function to rearrange the received RLC PDUs based on RLC sequence number (SN) or PDCP sequence number (SN). It may include a function of recording lost RLC PDUs, may include a function of reporting a status of lost RLC PDUs to a transmitting side, and a function of requesting retransmission of lost RLC PDUs. If there is a lost RLC SDU, it may include a function of forwarding only the RLC SDUs up to the previous layer in order until the lost RLC SDU, or if a predetermined timer expires even if there is a lost RLC SDU It may include a function of delivering all RLC SDUs received before the start to the upper layer in order, or if a predetermined timer expires even if there is a missing RLC SDU, all RLC SDUs received so far to the upper layer in order. It can include the ability to deliver. In addition, RLC PDUs may be processed in the order in which they are received (regardless of the order of serial number and sequence number, in the order of arrival) and delivered to the PDCP device regardless of the order (Out-of sequence delivery). Segments stored in a buffer or to be received in the future may be received, reconstructed into one complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and the function may be performed in the NR MAC layer or replaced with a multiplexing function of the NR MAC layer.

In the above, the out-of-sequence delivery function of the NR RLC device refers to the function of directly delivering RLC SDUs received from the lower layer to the upper layer regardless of the order, and originally, one RLC SDU is When received by being divided into SDUs, it may include a function of reassembling and transmitting them, and includes a function of storing the RLC SN or PDCP SN of the received RLC PDUs, sorting the order, and recording the lost RLC PDUs. I can.

The NR MACs 2d-15 and 2d-30 may be connected to several NR RLC layer devices configured in one terminal, and the main functions of the NR MAC may include some of the following functions.

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

-Multiplexing/demultiplexing of MAC SDUs

-Scheduling information reporting function

-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 (2d-20, 2d-25) channel-codes and modulates upper layer data, makes it into OFDM symbols, and transmits it to the radio channel, or demodulates and channel-decodes OFDM symbols received through the radio channel to the upper layer. You can perform the transfer operation.

In the LTE system, the UE performs a frequency measurement while performing a cell reselection procedure in an RRC idle mode. In the above, the frequency measured while performing the cell reselection procedure is an intra-frequency measurement or a serving cell or Pcell measurement for frequencies set by the base station or broadcast from a camped cell. It can mean. However, inter-frequency measurement is not performed except for intra-frequency measurement or serving cell measurement, and the frequency measurement result is not separately reported to the network.

That is, when the terminal first performs a cell reselection procedure to find a suitable cell and camps on, and then performs the RRC connection setup procedure to transition to the RRC connection mode, the base station tells the RRC connection mode terminal what frequencies ( For example, frequency list) or what frequency bands to measure, in what order to measure by setting the priority for each frequency, and how to measure the intensity of frequency when measuring frequency (e.g. For example, L1 filtering, L2 filtering, L3 filtering method, or which coefficient is used, which calculation method is used, etc.), when measuring frequency, depending on which event or condition to start measurement, the current serving cell (or the current When compared to the frequency you are camping on), how will the measurement be performed, the frequency results measured according to what event or condition will be reported, and the current serving cell (or the frequency you are currently camping on). It is possible to set whether to report the frequency only when a standard or condition is satisfied, or to report the frequency measurement result at any period. The terminal measures the frequencies according to the frequency setting set by the base station as described above, and reports the frequency measurement results to the base station according to the event or condition. In addition, the base station may determine whether to apply a frequency aggregation technology (Carrier aggregation) or dual connectivity technology (dual connectivity) to the terminal by using the frequency measurement result received from the terminal.

In the present invention, in a next-generation mobile communication system, a frequency measurement is performed in an RRC idle mode or an RRC inactive mode before the UE transitions to an RRC connected mode, and the measurement result is When the terminal establishes a connection with the network, it instructs the base station, and proposes a method for quickly reporting the frequency measurement result by entering the RRC connected mode. Based on the above method, the base station enables the terminal to quickly set the frequency aggregation technology or the dual access technology to the terminal based on the measurement result in the RRC idle mode or the RRC inactive mode.

Specifically, when the base station transitions the RRC connected mode terminal that has established a connection with the network to the RRC idle mode or RRC deactivation mode, the terminal uses an RRC message to measure frequency information or the frequencies to be measured in the RRC idle mode or RRC deactivation mode. In mode or RRC deactivation mode, time (or period) information or frequencies to be measured by the terminal in RRC idle mode or RRC deactivation mode set region information (or cell list) to be measured by the terminal, and the terminal sets the RRC idle mode or RRC It can be instructed to perform frequency measurements in the inactive mode. In addition, the UE reads the system information of the newly camped cell while performing a cell reselection operation every time it moves, and determines whether to continue or end the frequency measurement in the RRC idle mode or RRC inactive mode, or the measurement period according to the system information. The present invention proposes an efficient terminal operation so that a procedure such as whether to extend (for example, restart a timer), report a frequency measurement result, or discard the frequency measurement result, can be performed.

In the present invention, a bearer may mean including SRB and DRB, SRB means Signaling Radio Bearer, and DRB means Data Radio Bearer. In addition, UM DRB refers to a DRB using an RLC layer device operating in an UM (Unacknowledged Mode) mode, and AM DRB refers to a DRB using an RLC layer device operating in an AM (Acknowledged Mode) mode.

2E is a procedure for a UE to switch from an RRC idle mode or an RRC inactive mode to an RRC connected mode and set a carrier aggregation technology in the next-generation mobile communication system of the present invention. It is a figure shown.

In FIG. 2E, the base station may transition the UE to the RRC idle mode or the RRC inactive mode for a predetermined reason from the RRC connected mode UE that has established a connection with the network. In the above, the predetermined reason may be a shortage of scheduling resources of the base station or a suspension of data transmission/reception with the terminal for a predetermined time.

In the above, the base station may transmit an RRCRelease message to the terminal to instruct the terminal to transition to an RRC idle mode or an RRC deactivation mode. In the above, the RRCRelease message can instruct the terminal to transition to the RRC deactivation mode with an indicator (suspend-config), and if the indicator (suspend-config) is not included in the RRCRelease message, the terminal can transition to the RRC idle mode. (2e-05).

When the terminal transitions to the RRC idle mode or RRC deactivation mode, if connection with the network is required for a predetermined reason, it performs a random access procedure, receives a random access response, requests RRC connection setup, and receives an RRC message to establish an RRC connection. Can be performed (2e-10, 2e-15, 2e-20, 2e-25, 2e-30, 2e-35, 2e-40).

The UE establishes uplink transmission synchronization with the base station through a random access process and transmits an RRCSetupRequest message to the base station (2e-25). The RRCSetupRequest message may include an identifier of the terminal and a reason for establishing a connection (establishmentCause).

The base station transmits an RRCSetup message so that the terminal establishes an RRC connection (2e-30). The RRCSetup message may include at least one of configuration information for each logical channel, configuration information for each bearer, configuration information for a PDCP layer device, configuration information for an RLC layer device, and configuration information for a MAC layer device.

In the RRCSetup message, a bearer identifier (for example, an SRB identifier or a DRB identifier) is assigned to each bearer, and a PDCP layer device, an RLC layer device, a MAC layer device, and a PHY layer device can be configured for each bearer. In addition, in the RRCConnectionSetup message, the length of the PDCP serial number used by the PDCP layer device (for example, 12 bits or 18 bits) can be set for each bearer, and the length of the RLC serial number used by the RLC layer device (for example, 6 bits or 12 bits or 18 bits) can be set. In addition, in the RRCConnectionSetup message, for each bearer, whether to use a header compression and decompression protocol in an uplink or a downlink can be indicated to the PDCP layer device, and whether to perform an integrity protection or verification procedure can be indicated. In addition, the PDCP layer device may indicate whether to perform out-of-order delivery.

The terminal that has established the RRC connection transmits an RRCSetupComplete message to the base station (2e-40). The RRCSetupComplete message may include a control message called SERVICE REQUEST requesting the AMF or MME to set up a bearer for a predetermined service by the UE. The base station may transmit the SERVICE REQUEST message contained in the RRCConnetionSetupComplete message to the AMF or MME, and the AMF or MME may determine whether to provide the service requested by the UE.

As a result of the determination, if the terminal decides to provide the requested service, the AMF or MME transmits an INITIAL CONTEXT SETUP REQUEST message to the base station. The INITIAL CONTEXT SETUP REQUEST message may include information such as QoS (Quality of Service) information to be applied when setting up a Data Radio Bearer (DRB), and security-related information (e.g., Security Key, Security Algorithm) to be applied to the DRB.

The base station transmits and receives a SecurityModeCommand message and a SecurityModeComplete message to configure security with the terminal, and when security configuration is completed, the base station transmits an RRCConnectionReconfiguration message to the terminal (2e-45).

In the RRCConnectionReconfiguration message, a bearer identifier (for example, an SRB identifier or a DRB identifier) is allocated to each bearer, and a PDCP layer device, an RLC layer device, a MAC layer device, and a PHY layer device can be configured for each bearer. In addition, in the RRCConnectionReconfiguration message, the length of the PDCP serial number used by the PDCP layer device (for example, 12 bits or 18 bits) can be set for each bearer, and the length of the RLC serial number used by the RLC layer device (for example, 6 bits or 12 bits or 18 bits) can be set. In addition, in the RRCConnectionSetup message, for each bearer, whether to use a header compression and decompression protocol in an uplink or a downlink can be indicated to the PDCP layer device, and whether to perform an integrity protection or verification procedure can be indicated. In addition, the PDCP layer device may indicate whether to perform out-of-order delivery.

In addition, the RRCConnectionReconfiguration message may include configuration information of the DRB in which user data is to be processed, and the terminal applies the information to configure the DRB and transmits an RRCConnectionReconfigurationComplete message to the base station (2e-45). After completing the DRB setup with the UE, the base station may transmit an INITIAL CONTEXT SETUP COMPLETE message to the AMF or MME and complete the connection (2e-50).

When all of the above processes are completed, the terminal transmits and receives data through the base station and the core network (2e-55, 2e-60). According to some embodiments, the data transmission process is largely composed of three steps of RRC connection setup, security setup, and DRB setup. In addition, the base station may transmit an RRC Connection Reconfiguration message to the terminal for a predetermined reason to refresh, add, or change the configuration (2e-65).

In the RRCConnectionReconfiguration message, frequency setting information to be measured by the UE (e.g., a list of frequencies to be measured, a period to measure a frequency, a condition to measure a frequency, or a condition to report a frequency after a frequency side, a frequency) Cell identifiers, etc.) can be set.

According to the frequency measurement setting information, the terminal performs frequency measurement and, when a predetermined condition is satisfied (for example, when the signal strength of a specific frequency is better than a certain reference (eg, a threshold value) or the current serving cell (frequency)) When the signal strength of is less than a certain reference (for example, a threshold value), the frequency measurement result measured above may be reported to the base station (2e-60).

When the base station receives the frequency measurement result, the base station can set the carrier aggregation technology to the terminal by setting an additional Scell by putting Scell configuration information in the RRCReconfiguration message (2e-65) based on the frequency measurement result and transmitting it to the terminal, and the RRCReconfiguration In the message 2e-65, the secondary cell group setting information is inserted and transmitted to the terminal to set the dual access technology to the terminal.

When the base station has set the carrier aggregation technology to the terminal in the above, the base station can activate, deactivate, or transition to the dormant state of the Scells set above by using a MAC CE (MAC Control Element).

The procedure for the base station to set the carrier aggregation technology or the dual access technology to the terminal as described above can be summarized as follows. First, when the terminal establishes a connection with the base station and the base station sets frequency measurement configuration information to the terminal, the terminal performs frequency measurement based on the frequency measurement configuration information and reports the measurement result to the base station. In addition, the base station may set additional Scell configuration information as an RRC message to set the carrier aggregation technology to the terminal based on the frequency measurement result of the terminal, and send MAC CE to activate, dormant or deactivate the Scells. . In addition, the base station may set additional cell group (Sceondary cell group) configuration information to set the dual access technology to the terminal based on the frequency measurement result of the terminal.

As described above, when the base station sets the carrier aggregation technology or the dual access technology to the terminal, the terminal first enters the RRC connection mode to receive the frequency setting information, and the terminal performs the frequency measurement, so the measurement report is performed very late. As a result, there is a problem that the carrier aggregation technology or the dual access technology must be set late. Therefore, in order to improve this, in the following of the present invention, the terminal efficiently performs frequency measurement in the RRC idle mode and immediately reports the frequency measurement result when a connection with the network is established.

FIG. 2F shows that in the next-generation mobile communication system of the present invention, a terminal enables early measurement of a frequency in an RRC idle mode or an RRC deactivation mode, and a fast measurement report. It is a diagram showing the first embodiment.

In the first embodiment of the present invention, a plurality of frequency measurement groups can be set when the base station sets the frequency measurement configuration information for the terminal to perform frequency measurement in an RRC idle mode or an RRC inactive mode with an RRCRelease message to the terminal. do.

For example, a first LTE frequency group and a second LTE frequency group are set, and the UE performs frequency measurement for each of the two groups in RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first LTE frequency group and frequencies with the best signal within the second LTE frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Accordingly, as the base station efficiently configures a plurality of frequency groups, it is possible to quickly set up a carrier aggregation technology or a dual access technology (for example, LTE DC) based on a frequency measurement report for each group of the terminal.

For example, a first LTE frequency group and a second NR frequency group are set, and the UE performs frequency measurements for each of the two groups in the RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first LTE frequency group and frequencies with the best signal within the second NR frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Therefore, as the base station efficiently configures a plurality of frequency groups, carrier aggregation technology or dual access technology (e.g. EN-DC or NE-DC (for example, EN-DC or NE-DC) Dual connection)) can be set quickly.

For example, a first NR frequency group and a second NR frequency group are set, and the UE performs frequency measurements for each of the two groups in the RRC idle mode or RRC inactive mode, and the measurement results are separately for each group. Save and report. For example, frequencies with the best signal within the first NR frequency group and frequencies with the best signal within the second NR frequency group may be reported. That is, rather than reporting frequencies having the best signal in all of the groups, a plurality of frequency groups are set so that frequencies having the best signal are reported for each group. Therefore, as the base station efficiently sets up a plurality of frequency groups, carrier aggregation technology or dual access technology (e.g. NR-DC (dual access between NR base station and NR base station)) based on the frequency measurement report for each group of the terminal Can be set quickly.

In the first embodiment, a terminal capable of performing frequency measurement in an RRC idle mode or an RRC inactive mode and quickly reporting a frequency measurement result may be a terminal corresponding to one or more of the following cases.

1. All terminals that support the fast frequency measurement and reporting method of the fast frequency measurement result in the RRC idle mode or RRC inactive mode of the terminal capability

2. Among the RRC idle mode or inactive mode UE, when the base station transitions the UE from the RRC connected mode to the RRC idle mode or RRC inactive mode with an RRC message, setting information instructing to measure the frequency in the RRC idle mode or the RRC inactive mode is provided. Received terminal. For example, in RRC idle mode or RRC inactive mode, set frequency setting information or measurement period (for example, a timer value) to perform frequency measurement, or region setting information (for example, a list of cell identifiers) to perform the frequency measurement. Terminal

In Figure 2f, the terminal (2f-05) in the RRC connected mode is the RRC idle mode (RRC idle mode) or the RRC inactive mode (RRC) by the base station for a certain reason (for example, because there is no data transmission and reception for a certain period of time). inactive mode) mode can be switched (2f-15). In the above, when the base station transitions the mode of the terminal, it sends an RRC message (2f-10). For example, an RRCRelease message (transition instruction to RRC idle mode) or an RRCRelease message including suspend-config (transition instruction to RRC deactivation mode) may be transmitted. The RRC message may include a plurality of the following pieces of information to be applied when the UE performs early measurement in the RRC idle mode or the RRC deactivation mode.

-Frequency setting information to be measured in RRC idle mode or RRC inactive mode

* 주파수 설정 정보

* Frequency setting information

** LTE 주파수 측정 정보 그룹 또는 리스트(EUTRA frequency configuration information/list/group)

** LTE frequency measurement information group or list (EUTRA frequency configuration information/list/group)

*** 어떤 주파수들 혹은 어떤 주파수 밴드들을 측정할 것인지(예를 들면 주파수 리스트), 각 주파수 별 우선순위를 설정해주어 어떤 순서로 측정을 할 것인지, 주파수를 측정할 때 주파수의 세기를 어떤 필터링 방법으로 측정할 것인지(예를 들면 L1 필터링, L2 필터링, L3 필터링 방법, 혹은 어떤 계수를 이용하여, 어떤 계산 방법으로 측정할 것인지 등), 주파수를 측정할 때 어떤 이벤트 혹은 조건에 따라서 측정을 시작할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준(예를 들면 신호의 세기가 지시해준 문턱치 값 이상일 때)으로 측정 및 보고를 할 것인지, 어떤 이벤트 혹은 조건에 따라서 측정한 주파수 결과를 보고할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준 혹은 조건을 만족해야 주파수를 보고할 것인지, 어떤 주기마다 주파수 측정 결과를 보고할 것인지 등의 주파수 측정 설정 정보(early measurement setup)를 포함하여 설정해줄 수 있다.

*** Which frequencies or frequency bands to measure (for example, frequency list), how to measure the order by setting the priority for each frequency, and how to filter the strength of the frequency when measuring frequency Whether to measure by using (e.g., L1 filtering, L2 filtering, L3 filtering method, or which coefficient to measure, by which calculation method, etc.), and according to which event or condition to start measurement when measuring frequency , When compared with the current serving cell (or the frequency currently camped on), the measurement and report will be performed with what criteria (e.g., when the signal strength is greater than the indicated threshold), and measured according to the event or condition. Frequency measurement such as whether to report the frequency result, what criteria or conditions should be satisfied when compared with the current serving cell (or the frequency currently camping), and whether to report the frequency measurement result at any period It can be set including early measurement setup.

** NR 주파수 측정 정보 그룹 또는 리스트(NR frequency configuration information/list/group)

** NR frequency measurement information group or list (NR frequency configuration information/list/group)

*** 어떤 주파수들 혹은 어떤 주파수 밴드들을 측정할 것인지(예를 들면 주파수 리스트), 또는 각 주파수의 SSB 식별자 정보 또는 SSB 전송 자원(주파수와 시간 자원) 또는 각 주파수 별(또는 SSB 별) 우선순위를 설정해주어 어떤 순서로 측정을 할 것인지, 주파수를 측정할 때 주파수의 세기를 어떤 필터링 방법으로 측정할 것인지(예를 들면 L1 필터링, L2 필터링, L3 필터링 방법, 혹은 어떤 계수를 이용하여, 어떤 계산 방법으로 측정할 것인지 등), 주파수를 측정할 때 어떤 이벤트 혹은 조건에 따라서 측정을 시작할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준(예를 들면 신호의 세기가 지시해준 문턱치 값 이상일 때)으로 측정 및 보고를 할 것인지, 어떤 이벤트 혹은 조건에 따라서 측정한 주파수 결과를 보고할 것인지, 현재 서빙 셀(혹은 현재 캠프온 하고 있는 주파수)와 비교했을 때 어떤 기준 혹은 조건을 만족해야 주파수를 보고할 것인지, 어떤 주기마다 주파수 측정 결과를 보고할 것인지 등의 주파수 측정 설정 정보(early measurement setup)를 포함하여 설정해줄 수 있다.

*** Which frequencies or frequency bands to measure (e.g., frequency list), SSB identifier information of each frequency or SSB transmission resource (frequency and time resource) or priority for each frequency (or SSB) How to measure the frequency by setting and in what order, and how to measure the intensity of the frequency when measuring the frequency (e.g., L1 filtering, L2 filtering, L3 filtering method, or using some coefficient, what calculation Method, etc.), according to which event or condition to start measurement when measuring the frequency, and what criteria (e.g., the strength of the signal) when compared to the current serving cell (or the frequency currently camping on). When the frequency is higher than the indicated threshold value), whether to report the measured frequency result according to an event or condition, and what criteria or condition when compared to the current serving cell (or the frequency currently camped on) The frequency measurement setup information (early measurement setup), such as whether to report the frequency or report the frequency measurement result at any period, can be set when satisfied.

* RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 기간 또는 주파수 측정을 수행할 타이머 값(예를 들면 T331), 예를 들면 상기에서 RRCRelease에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 지시한 경우, 타이머를 시작하여 타이머가 구동되는 동안 주파수 측정을 수행할 수 있으며, 타이머가 만료되면 주파수 측정을 중지할 수 있다.

* A period for performing frequency measurement in RRC idle mode or RRC inactive mode or timer value for performing frequency measurement (for example, T331), for example, instructing frequency measurement in RRC idle mode or RRC inactive mode in RRCRelease above. In this case, the timer may be started to perform frequency measurement while the timer is running, and when the timer expires, the frequency measurement may be stopped.

* RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 영역 정보. 예를 들면 물리적 셀 식별자들(PCID)의 리스트를 지시하여 단말이 만약에 상기 영역 정보에서 지시하는 셀에 있는 경우, 주파수 측정을 수행하고, 상기 영역 정보를 벗어난 경우, 상기 주파수 측정을 중단할 수 있다. 예를 들면 상기 영역 정보를 벗어난 경우, 상기 타이머를 중지시키고, 주파수 측정을 중단할 수 있다.

* Area information to perform frequency measurement in RRC idle mode or RRC inactive mode. For example, by indicating a list of physical cell identifiers (PCID), if the terminal is in a cell indicated by the region information, frequency measurement is performed, and if the region information is out, the frequency measurement may be stopped. have. For example, when the region information is out of the range, the timer may be stopped and frequency measurement may be stopped.

* 측정 보고 문턱치 값을 설정해주고 설정된 주파수 그룹에서 상기 문턱치 값보다 신호의 세기가 좋은 복수 개의 주파수들을 보고할 수 있다.

* A measurement report threshold value may be set, and a plurality of frequencies having a signal strength greater than the threshold value in the set frequency group may be reported.

In the above, when the UE performs early measurement in the RRC idle mode or the RRC inactive mode, the condition for starting the frequency measurement may start when one of the following conditions is satisfied (2f-30).

1.When the UE receives the RRCRelease message, an indicator to perform frequency measurement in the RRC idle mode or RRC inactive mode is included, and the frequency information to be measured and the period to measure the frequency (for example, a timer value) are set, A timer may be started and frequency measurement may be performed according to the frequency information.

2. When the terminal receives the RRCRelease message, an indicator to perform frequency measurement in the RRC idle mode or RRC inactive mode is included, and the period for measuring the frequency (for example, a timer value) is set, but the frequency information to be measured is included If not, the UE may start a timer once and perform frequency measurement according to the frequency information if frequency information to be measured in the RRC idle mode or RRC inactive mode is broadcast in the system information. If the UE moves to another cell, when frequency information to be measured in an RRC idle mode or an RRC deactivation mode is broadcast in the system information of a newly camped cell, frequency measurement may be performed according to the new frequency information.

That is, if frequency measurement configuration information for performing frequency measurement in RRC idle mode or RRC inactive mode is not set in the RRCRelease message, the terminal broadcasts frequency configuration information for frequency measurement in RRC idle mode or RRC inactive mode in system information. In this case, frequency measurement may be performed in an RRC idle mode or an RRC inactive mode based on this. In the above, if the terminal moves and camps on a new cell, the frequency measurement information may be updated with the frequency setting information for frequency measurement in the RC idle mode or the RRC inactive mode broadcast to the new cell, and frequency measurement may be performed again (2f- 12).

However, if frequency measurement setting information to perform frequency measurement in RRC idle mode or RRC deactivation mode is set in the RRCRelease message, the frequency set in the RRCRelease message rather than RRC idle mode or RRC deactivation mode frequency measurement information broadcast in system information You can prioritize and apply measurement setting information and perform frequency measurement. That is, if frequency measurement configuration information for performing frequency measurement in RRC idle mode or RRC deactivation mode is set in the RRCRelease message, the terminal does not reflect, consider, or ignore the frequency configuration information broadcast in the system information.

According to one or more of the above conditions, the UE can start early measurement of frequency. While performing frequency measurement, the UE sends message 3 (e.g., RRCSetupRequest or RRCResumeRequest message) to the base station (2f-35), and receives message 4 (e.g., RRCSetup or RRCResume message) from the base station in response to random access. It can be seen that the procedure was successful (2f-40), and it is possible to transition to the RRC connection mode (2f-45).

In the above, in the system information (e.g., SIB2) received before the UE establishes a connection in the current cell, an indicator supporting RRC idle mode or RRC deactivation mode frequency measurement or RRC idle mode or RRC inactive mode frequency measurement result can be received. If it broadcasts an indicator indicating that it is possible, the terminal may inform the base station with message 5 that it has a frequency measurement result measured in the RRC idle mode or the RRC inactive mode. Alternatively, the indicator may define and use an indicator indicating LTE frequency measurement support or NR frequency measurement support, respectively.

When sending message 5 (e.g., RRC Setup Complete or RRC Resume Complete), the UE performed frequency measurement in RRC idle mode or RRC inactive mode, and may transmit, including an indicator that there is a frequency measurement result to be reported. have. In the message 5, a new indicator may be defined to indicate that there is a fast frequency measurement result, and the indicator indicating that there is terminal information already defined in the RRC message (RRC Setup Complete or RRC Resume Complete) can be reused. May be (2f-50).

If the base station confirms with an indicator that the UE has performed a fast frequency measurement in the RRC idle mode or the RRC inactive mode in message 5, and there is a measurement result to report it, a message to report the measurement result in order to quickly report the frequency measurement result ( UEInformationRequest) may be sent to the UE (2f-55). For example, the base station may request frequency measurement result information from the terminal by using a UEinformationRequest in a DL-DCCH message. Upon receiving the message, the UE can quickly report a fast frequency measurement result to the base station (UEInformationResponse, 2f-65). For example, upon receiving the message, the UE may report a frequency measurement result using a UEInformationResponse message as a UL-DCCH message. In the above, the frequency measurement result is a serving cell/frequency measurement result (e.g., NR-SS RSRP/RSRQ), a neighboring cell/frequency measurement result of the serving cell/frequency, a neighboring cell/frequency measurement result that can be measured by the terminal, It may include the indicated cell/frequency measurement result.

In the above, the condition at which the terminal stops fast frequency measurement may be as follows.

1. After transmitting to the base station that there is a measurement result report in message 5,

2. If the measurement report timer (eg T331) has expired,

3. When the RRC idle mode or RRC deactivation mode set in the RRCRelease message is out of the range indicated by the frequency measurement area information,

The UE may stop RRC idle mode or RRC inactive mode frequency measurement (IDLE mode/INACTIVE mode measurement) according to one or more of the above conditions (2f-60).

In the above, the terminal performs measurement on frequencies that it can measure, that is, supports it from the fast frequency setting-related information, and at this time, the terminal may select a frequency to perform measurement preferentially according to a predetermined set priority. have.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC inactive mode, a specific terminal operation when an RRCRelease message is received for the first embodiment is proposed as follows. do.

-When the terminal receives the RRCRelease message

* 만약 상기 RRCRelease 메시지가 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수를 측정할 설정 정보(measIdleConfig)가 포함되어 있다면

* If the RRCRelease message contains configuration information (measIdleConfig) to measure frequency in RRC idle mode or RRC inactive mode

** 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수와 측정 결과를 저장하는 단말 내부 변수를 초기화하고 비운다(clear)

** The terminal initializes and clears the terminal internal variable that stores the RRC idle mode or the RRC inactive mode frequency measurement configuration information and the terminal internal variable that stores the measurement result.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파 측정 설정 정보에 포함된 측정 기간(또는 타이머값, measureDuration)를 상기 측정 결과를 저장하는 단말 내부 변수에 저장한다.

** And the terminal stores the measurement period (or timer value, measureDuration) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information in a terminal internal variable that stores the measurement result.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 포함된 측정 기간(또는 타이머 값)을 설정하여 타이머(예를 들면 T331)를 시작한다.

** And the terminal starts a timer (for example, T331) by setting a measurement period (or a timer value) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The LTE or NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수(예를 들면 VarMeasIdleConfig)에 저장한다.

*** If there is LTE or NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivation mode frequency measurement setting information is stored in a terminal internal variable (for example, VarMeasIdleConfig) that stores information.

**** 구체적으로 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에 있고, 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보(measIdleConfigSIB)가 포함되어 있고, 단말이 캐리어 집적 기술 또는 이중 접속 기술을 위해 상기 주파수 측정을 지원한다면

**** Specifically, the terminal is in the RRC idle mode or RRC deactivated mode, and the RRC idle mode or RRC deactivated mode frequency measurement configuration information (measIdleConfigSIB) is included in the system information (for example, SIB5), and the terminal is carrier aggregation If the frequency measurement is supported for technology or dual access technology

***** 만약 타이머(T331)가 구동 중이고 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 주파수 측정 설정 정보가 없다면

***** If the timer T331 is running and there is no frequency measurement setting information in the terminal internal variable that stores the RRC idle mode or RRC deactivated mode frequency measurement setting information

****** 단말은 상기 시스템 정보에서 수신한 주파수 측정 설정 정보를 업데이트 또는 저장 또는 교체한다.

****** The terminal updates, stores, or replaces the frequency measurement configuration information received from the system information.

****** 그리고 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 시작한다.

****** And the terminal starts the RRC idle mode or RRC inactive mode frequency measurement according to the terminal operation embodiments proposed in the following.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** If there is NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivated mode frequency measurement setting information is stored in a terminal internal variable that stores information.

** 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 시작하고 주파수 측정 결과를 저장하고 보고한다.

** The terminal starts frequency measurement in the RRC idle mode or the RRC deactivation mode according to the terminal operation embodiments proposed in the following, and stores and reports the frequency measurement result.

-If the RRCRelease message is received and the UE transitions to the RRC idle mode

* MAC 계층 장치를 리셋한다.

* Reset the MAC layer device.

* T320, T322, T325, T330, T331 를 제외한 모든 타이머들을 중지시킨다.

* Stop all timers except T320, T322, T325, T330, T331.

** 본 발명에서는 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 기간을 지시하는 타이머(T331)를 구동하기 때문에 RRC 유휴 모드 또는 RRC 비활성화 모드에서도 상기 타이머가 구동되어야 하므로, 상태 천이를 수행하여도 상기 타이머를 중지하지 않는 방법을 제안한다.

** In the present invention, since the timer T331 indicating a period to perform frequency measurement in the RRC idle mode or the RRC inactive mode is driven, the timer must be driven in the RRC idle mode or the RRC inactive mode. Also proposes a method of not stopping the timer.

* RRC 계층 장치의 중지 지시(suspension)에 의해서 RRC 연결 모드를 떠나는 경우, 즉, RRC 비활성화 모드로 천이하는 경우, 다음의 동작을 추가로 수행할 수 있다.

* When leaving the RRC connected mode according to a suspension of the RRC layer device, that is, when transitioning to the RRC deactivation mode, the following operation may be additionally performed.

** 모든 SRB와 DRB들에 대한 RLC 계층 장치를 재수립한다.

** Re-establish the RLC layer device for all SRBs and DRBs.

** 단말 컨텍스트를 저장한다. 상기 단말 컨텍스트는 RRC 설정, 보안 컨텍스트, PDCP 설정 정보, ROHC 컨텍스트, 셀 식별자 등을 포함할 수 있다.

** Save the terminal context. The terminal context may include RRC configuration, security context, PDCP configuration information, ROHC context, cell identifier, and the like.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC inactive mode, a specific terminal operation when an RRCRelease message is received for the first embodiment is proposed as follows. do.

-When the terminal receives the RRCRelease message

* 만약 상기 RRCRelease 메시지가 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수를 측정할 설정 정보(measIdleConfig)가 포함되어 있다면

* If the RRCRelease message contains configuration information (measIdleConfig) to measure frequency in RRC idle mode or RRC inactive mode

** 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수와 측정 결과를 저장하는 단말 내부 변수를 초기화하고 비운다(clear)

** The terminal initializes and clears the terminal internal variable that stores the RRC idle mode or the RRC inactive mode frequency measurement configuration information and the terminal internal variable that stores the measurement result.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파 측정 설정 정보에 포함된 측정 기간(또는 타이머값, measureDuration)를 상기 측정 설정 정보를 저장하는 단말 내부 변수(VarMeasIdleConfig)에 저장한다.

** And the terminal stores the measurement period (or timer value, measureDuration) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information in a terminal internal variable (VarMeasIdleConfig) that stores the measurement configuration information.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 포함된 측정 기간(또는 타이머 값)을 설정하여 타이머(예를 들면 T331)를 시작한다.

** And the terminal starts a timer (for example, T331) by setting a measurement period (or a timer value) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The LTE or NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 단말은 셀 셀렉션 또는 리셀렉션 절차를 수행하여 적합한 셀(suitable cell)을 찾고 캠프온하여 시스템 정보(예를 들면 SIB5)를 획득한다.

*** The UE performs a cell selection or reselection procedure to find a suitable cell and camp on to obtain system information (eg, SIB5).

*** 상기 시스템 정보에서 방송되는 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수(예를 들면 VarMeasIdleConfig)에 저장한다.

*** If there is LTE or NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivation mode frequency measurement setting information is stored in a terminal internal variable (eg, VarMeasIdleConfig) that stores information.

**** 구체적으로 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에 있고, 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보(measIdleConfigSIB)가 포함되어 있고, 단말이 캐리어 집적 기술 또는 이중 접속 기술을 위해 상기 주파수 측정을 지원한다면

**** Specifically, the terminal is in the RRC idle mode or RRC deactivated mode, and the RRC idle mode or RRC deactivated mode frequency measurement configuration information (measIdleConfigSIB) is included in the system information (for example, SIB5), and the terminal is carrier aggregation If the frequency measurement is supported for technology or dual access technology

***** 만약 타이머(T331)가 구동 중이고 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 주파수 측정 설정 정보가 없다면

***** If the timer T331 is running and there is no frequency measurement setting information in the terminal internal variable that stores the RRC idle mode or RRC deactivated mode frequency measurement setting information

****** 단말은 상기 시스템 정보에서 수신한 주파수 측정 설정 정보를 업데이트 또는 저장 또는 교체한다.

****** The terminal updates, stores, or replaces the frequency measurement configuration information received from the system information.

****** 그리고 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 시작한다.

****** And the terminal starts the RRC idle mode or RRC inactive mode frequency measurement according to the terminal operation embodiments proposed in the following.

*** 만약 상기 시스템 정보에서 방송되는 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

*** If there is no LTE or NR frequency measurement list or group information broadcast in the system information

**** 단말은 상기 타이머(T331)를 중지한다.

**** The terminal stops the timer T331.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** If there is NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivated mode frequency measurement setting information is stored in a terminal internal variable that stores information.

** 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 시작하고 주파수 측정 결과를 저장하고 보고한다.

** The terminal starts frequency measurement in the RRC idle mode or the RRC deactivation mode according to the terminal operation embodiments proposed in the following, and stores and reports the frequency measurement result.

-If the RRCRelease message is received and the UE transitions to the RRC idle mode

* MAC 계층 장치를 리셋한다.

* Reset the MAC layer device.

* T320, T322, T325, T330, T331 를 제외한 모든 타이머들을 중지시킨다.

* Stop all timers except T320, T322, T325, T330, T331.

** 본 발명에서는 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 기간을 지시하는 타이머(T331)를 구동하기 때문에 RRC 유휴 모드 또는 RRC 비활성화 모드에서도 상기 타이머가 구동되어야 하므로, 상태 천이를 수행하여도 상기 타이머를 중지하지 않는 방법을 제안한다.

** In the present invention, since the timer T331 indicating a period to perform frequency measurement in the RRC idle mode or the RRC inactive mode is driven, the timer must be driven in the RRC idle mode or the RRC inactive mode. Also proposes a method of not stopping the timer.

* RRC 계층 장치의 중지 지시(suspension)에 의해서 RRC 연결 모드를 떠나는 경우, 즉, RRC 비활성화 모드로 천이하는 경우, 다음의 동작을 추가로 수행할 수 있다.

* When leaving the RRC connected mode according to a suspension of the RRC layer device, that is, when transitioning to the RRC deactivation mode, the following operation may be additionally performed.

** 모든 SRB와 DRB들에 대한 RLC 계층 장치를 재수립한다.

** Re-establish the RLC layer device for all SRBs and DRBs.

** 단말 컨텍스트를 저장한다. 상기 단말 컨텍스트는 RRC 설정, 보안 컨텍스트, PDCP 설정 정보, ROHC 컨텍스트, 셀 식별자 등을 포함할 수 있다.

** Save the terminal context. The terminal context may include RRC configuration, security context, PDCP configuration information, ROHC context, cell identifier, and the like.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC deactivation mode, a specific terminal operation when an RRCRelease message is received for the first embodiment is proposed as follows. do.

-When the terminal receives the RRCRelease message

* 만약 상기 RRCRelease 메시지가 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수를 측정할 설정 정보(measIdleConfig)가 포함되어 있다면

* If the RRCRelease message contains configuration information (measIdleConfig) to measure frequency in RRC idle mode or RRC inactive mode

** 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수와 측정 결과를 저장하는 단말 내부 변수를 초기화하고 비운다(clear)

** The terminal initializes and clears the terminal internal variable that stores the RRC idle mode or the RRC inactive mode frequency measurement configuration information and the terminal internal variable that stores the measurement result.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파 측정 설정 정보에 포함된 측정 기간(또는 타이머값, measureDuration)를 상기 측정 설정 정보를 저장하는 단말 내부 변수(VarMeasIdleConfig)에 저장한다.

** And the terminal stores the measurement period (or timer value, measureDuration) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information in a terminal internal variable (VarMeasIdleConfig) that stores the measurement configuration information.

** 그리고 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 포함된 측정 기간(또는 타이머 값)을 설정하여 타이머(예를 들면 T331)를 시작한다.

** And the terminal starts a timer (for example, T331) by setting a measurement period (or a timer value) included in the RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The LTE or NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no LTE or NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 단말은 RRC 연결 모드를 떠나기 전에 현재 셀(suitable cell)에서 시스템 정보(예를 들면 SIB5)를 획득한다. 단말에 시스템 정보가 저장되어 있다면 저장되어 있는 시스템 정보를 사용할 수 있으며, 또는 현재 셀에서 새로 시스템 정보를 수신할 수도 있다.

*** The terminal acquires system information (eg, SIB5) in the current cell (suitable cell) before leaving the RRC connected mode. If system information is stored in the terminal, the stored system information can be used, or the system information can be newly received from the current cell.

*** 상기 시스템 정보에서 방송되는 LTE 또는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수(예를 들면 VarMeasIdleConfig)에 저장한다.

*** If there is LTE or NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivation mode frequency measurement setting information is stored in a terminal internal variable (eg, VarMeasIdleConfig) that stores information.

**** 구체적으로 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에 있고, 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보(measIdleConfigSIB)가 포함되어 있고, 단말이 캐리어 집적 기술 또는 이중 접속 기술을 위해 상기 주파수 측정을 지원한다면

**** Specifically, the terminal is in the RRC idle mode or RRC deactivated mode, and the RRC idle mode or RRC deactivated mode frequency measurement configuration information (measIdleConfigSIB) is included in the system information (for example, SIB5), and the terminal is carrier aggregation If the frequency measurement is supported for technology or dual access technology

***** 만약 타이머(T331)가 구동 중이고 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 주파수 측정 설정 정보가 없다면

***** If the timer T331 is running and there is no frequency measurement setting information in the terminal internal variable that stores the RRC idle mode or RRC deactivated mode frequency measurement setting information

****** 단말은 상기 시스템 정보에서 수신한 주파수 측정 설정 정보를 업데이트 또는 저장 또는 교체한다.

****** The terminal updates, stores, or replaces the frequency measurement configuration information received from the system information.

****** 그리고 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 시작한다.

****** And the terminal starts the RRC idle mode or RRC inactive mode frequency measurement according to the terminal operation embodiments proposed in the following.

** 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 있다면

** If there is NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 상기 NR 주파수 측정 리스트 또는 그룹 정보를 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** The NR frequency measurement list or group information is stored in a terminal internal variable that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

** 그렇지 않고, 만약 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보에 NR 주파수 측정 리스트 또는 그룹 정보가 없다면

** Otherwise, if there is no NR frequency measurement list or group information in the RRC idle mode or RRC inactive mode frequency measurement configuration information

*** 시스템 정보에서 방송되는 NR 주파수 측정 리스트 또는 그룹 정보가 있다면 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장한다.

*** If there is NR frequency measurement list or group information broadcast in the system information, the RRC idle mode or RRC deactivated mode frequency measurement setting information is stored in a terminal internal variable that stores information.

** 단말은 다음에서 제안하는 단말 동작 실시 예들에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 시작하고 주파수 측정 결과를 저장하고 보고한다.

** The terminal starts frequency measurement in the RRC idle mode or the RRC deactivation mode according to the terminal operation embodiments proposed in the following, and stores and reports the frequency measurement result.

-If the RRCRelease message is received and the UE transitions to the RRC idle mode

* MAC 계층 장치를 리셋한다.

* Reset the MAC layer device.

* T320, T322, T325, T330, T331 를 제외한 모든 타이머들을 중지시킨다.

* Stop all timers except T320, T322, T325, T330, T331.

** 본 발명에서는 RRC 유휴 모드 또는 RRC 비활성화 모드에서 주파수 측정을 수행할 기간을 지시하는 타이머(T331)를 구동하기 때문에 RRC 유휴 모드 또는 RRC 비활성화 모드에서도 상기 타이머가 구동되어야 하므로, 상태 천이를 수행하여도 상기 타이머를 중지하지 않는 방법을 제안한다.

** In the present invention, since the timer T331 indicating a period to perform frequency measurement in the RRC idle mode or the RRC inactive mode is driven, the timer must be driven in the RRC idle mode or the RRC inactive mode. Also proposes a method of not stopping the timer.

* RRC 계층 장치의 중지 지시(suspension)에 의해서 RRC 연결 모드를 떠나는 경우, 즉, RRC 비활성화 모드로 천이하는 경우, 다음의 동작을 추가로 수행할 수 있다.

* When leaving the RRC connected mode according to a suspension of the RRC layer device, that is, when transitioning to the RRC deactivation mode, the following operation may be additionally performed.

** 모든 SRB와 DRB들에 대한 RLC 계층 장치를 재수립한다.

** Re-establish the RLC layer device for all SRBs and DRBs.

** 단말 컨텍스트를 저장한다. 상기 단말 컨텍스트는 RRC 설정, 보안 컨텍스트, PDCP 설정 정보, ROHC 컨텍스트, 셀 식별자 등을 포함할 수 있다.

** Save the terminal context. The terminal context may include RRC configuration, security context, PDCP configuration information, ROHC context, cell identifier, and the like.

In the present invention, a method for rapidly performing frequency measurement and reporting in the RRC idle mode or RRC inactive mode in the first embodiment, a specific terminal operation for performing frequency measurement and storing and reporting the measurement result, embodiment 1-2 is described below. I propose like this.

-If a timer (the T331 timer) that allows frequency measurement in the RRC idle mode or the RRC inactive mode is running, the UE operates as follows.

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장된 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListEUTRA)가 있다면 LTE 주파수 측정 리스트 또는 그룹의 각 주파수 정보 또는 각 엔트리에 대해서 단말은 다음과 같이 주파수 측정을 수행한다.

* If there is an LTE frequency measurement list or group information (measIdleCarrierListEUTRA) stored in a terminal internal variable that stores RRC idle mode or RRC deactivation mode frequency measurement setting information, the terminal shall be the following for each frequency information or each entry of the LTE frequency measurement list or group. Perform frequency measurement as follows.

** 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하고, 상기 주파수 정보에서 지시하는 대역폭을 지원한다면

** If the terminal supports a carrier aggregation technology or dual access technology between the current serving frequency and the frequency, and supports the bandwidth indicated by the frequency information

*** 상기 주파수 정보에서 지시하는 주파수와 대역폭에서 주파수 측정을 수행한다.

*** Perform frequency measurement at the frequency and bandwidth indicated by the frequency information.

*** 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트 정보(예를 들면 셀 식별자 리스트 measCellList)가 포함되었다면 또는 설정되었다면

*** If cell identifier list information (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is included or is set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 상기 셀 식별자 리스트에서 지시된 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다.

**** The UE considers the serving cell (or Pcell) and the cells indicated in the cell identifier list as cells capable of measuring an RRC idle mode or an RRC inactive mode frequency.

*** 그렇지 않고, 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트(예를 들면 셀 식별자 리스트 measCellList)가 포함되지 않았다면 또는 설정되지 않았다면

*** Otherwise, if the cell identifier list (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is not included or is not set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 RSRP 또는 RSRQ 측정 결과가 설정된 문턱치값보다 신호의 세기가 크며, 신호의 세기가 가장 강한 몇 개의 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다. 상기에서 가장 강한 몇 개의 셀들을 고를지는 기지국이 설정해줄 수 있다.

**** The terminal measures the frequency of the serving cell (serving cell or Pcell) and the RSRP or RSRQ measurement result in RRC idle mode or RRC inactive mode by measuring some cells with the highest signal strength than the set threshold. Consider these possible cells. The base station can set how many cells to select the strongest cells.

*** 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 단말 내부 변수(예를 들면 VarMeasIdleReport)에 저장한다. 상기에서 측정 결과를 저장할 때 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 또는 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 별로 각각 따로 저장하고 나중에 보고할 수 있다.

*** In the above, the frequency measurement result measured in the RRC idle mode or the RRC inactive mode is stored in an internal variable (eg VarMeasIdleReport). When the measurement result is stored in the above, the NR frequency measurement list or group information (measIdleCarrierListNR) or the LTE frequency measurement list or group information (measIdleCarrierListNR) can be separately stored and reported later.

** 그렇지 않고, 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하지 않거나, 상기 주파수 정보에서 지시하는 대역폭을 지원하지 않는다면

** Otherwise, if the UE does not support a carrier aggregation technology or dual access technology between the current serving carrier and the frequency, or does not support the bandwidth indicated by the frequency information

*** 단말은 상기 주파수 정보에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 고려하지 않고, 주파수 측정을 수행하지 않는다.

*** The terminal does not take into account the RRC idle mode or RRC inactive mode frequency measurement in the frequency information and does not perform the frequency measurement.

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 저장하는 단말 내부 변수에 저장된 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR)가 있다면 NR 주파수 측정 리스트 또는 그룹의 각 주파수 정보 또는 각 엔트리에 대해서 단말은 다음과 같이 주파수 측정을 수행한다.

* If there is an NR frequency measurement list or group information (measIdleCarrierListNR) stored in a terminal internal variable that stores RRC idle mode or RRC deactivation mode frequency measurement configuration information, the terminal shall be Perform frequency measurement as follows.

** 만약 단말이 현재 서빙 주파수(serving carrier) 또는 SSB와 상기 주파수 또는 SSB와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하고, 상기 주파수 정보 또는 SSB 정보에서 지시하는 대역폭 또는 부분 대역폭(Bandwidth part, BWP)을 지원한다면

** If the terminal currently supports a serving carrier or a carrier aggregation technology or dual access technology between the SSB and the frequency or SSB, and the bandwidth or partial bandwidth indicated by the frequency information or SSB information (Bandwidth part, BWP) If you support

*** 상기 주파수 정보에서 지시하는 주파수와 대역폭 또는 부분 대역폭 또는 SSB(Synchronization System Block, 기지국과 동기화를 맞추기 위한 신호)에서 주파수 측정을 수행한다.

*** Frequency measurement is performed at the frequency and bandwidth or partial bandwidth indicated by the frequency information or SSB (Synchronization System Block, a signal to synchronize with the base station).

*** 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트 정보(예를 들면 셀 식별자 리스트 measCellList)가 포함되었다면 또는 설정되었다면

*** If cell identifier list information (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is included or is set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 상기 셀 식별자 리스트에서 지시된 셀들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다.

**** The UE considers the serving cell (or Pcell) and the cells indicated in the cell identifier list as cells capable of measuring an RRC idle mode or an RRC inactive mode frequency.

*** 그렇지 않고, 만약 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 셀 식별자 리스트(예를 들면 셀 식별자 리스트 measCellList)가 포함되지 않았다면 또는 설정되지 않았다면

*** Otherwise, if the cell identifier list (eg, cell identifier list measCellList) for frequency measurement in RRC idle mode or RRC inactive mode is not included or is not set

**** 단말은 서빙셀(serving cell 또는 Pcell)과 RSRP 또는 RSRQ 측정 결과가 설정된 문턱치값보다 신호의 세기가 크며, 신호의 세기가 가장 강한 몇 개의 셀들 또는 SSB들을 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정이 가능한 셀들로 고려한다. 상기에서 가장 강한 몇 개의 셀들을 고를지는 기지국이 설정해줄 수 있다.

**** The terminal has a serving cell (a serving cell or Pcell) and a signal strength greater than a threshold value for which the RSRP or RSRQ measurement result is set, and several cells or SSBs with the strongest signal strength are in RRC idle mode or RRC deactivation mode. Consider cells that can measure frequency. The base station can set how many cells to select the strongest cells.

*** 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 단말 내부 변수(예를 들면 VarMeasIdleReport)에 저장한다. 상기에서 측정 결과를 저장할 때 NR 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 또는 LTE 주파수 측정 리스트 또는 그룹 정보(measIdleCarrierListNR) 별로 각각 따로 저장하고 나중에 보고할 수 있다.

*** In the above, the frequency measurement result measured in the RRC idle mode or the RRC inactive mode is stored in an internal variable (eg VarMeasIdleReport). When the measurement result is stored in the above, the NR frequency measurement list or group information (measIdleCarrierListNR) or the LTE frequency measurement list or group information (measIdleCarrierListNR) can be separately stored and reported later.

** 그렇지 않고, 만약 단말이 현재 서빙 주파수(serving carrier)와 상기 주파수와의 캐리어 집적 기술 또는 이중 접속 기술을 지원하지 않거나, 상기 주파수 정보에서 지시하는 대역폭을 지원하지 않는다면

** Otherwise, if the UE does not support a carrier aggregation technology or dual access technology between the current serving carrier and the frequency, or does not support the bandwidth indicated by the frequency information

*** 단말은 상기 주파수 정보에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 고려하지 않고, 주파수 측정을 수행하지 않는다.

*** The terminal does not take into account the RRC idle mode or RRC inactive mode frequency measurement in the frequency information and does not perform the frequency measurement.

-If area information (for example, validity area) or cell identifier list is set in the terminal internal variable that stores the RRC idle mode or RRC inactive mode frequency measurement configuration information, and the area or cells indicated by the terminal information are If you select or camp on a cell that is not

* 단말은 상기 타이머(T331)를 중지하고, RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 중단한다.

* The terminal stops the timer T331 and stops measuring the RRC idle mode or RRC inactive mode frequency.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC deactivation mode is proposed as follows.

-The terminal operates a timer (T331) for measuring an RRC idle mode or an RRC inactive mode frequency, and the timer performs RRC idle mode or RRC deactivation mode frequency measurement only while the timer is running, and when the timer expires It characterized in that the RRC idle mode or RRC inactive mode frequency measurement is stopped.

-The terminal receives the configuration information for measuring the frequency of the RRC idle mode or RRC inactive mode in the RRC message and starts a timer when the measurement period is set.

-The terminal establishes a connection with the network while performing RRC idle mode or RRC deactivation mode frequency measurement, stops the timer when receiving the RRCSetup message or RRCResume message in message 4, or the area setting information is set, but the terminal is out of the area. You can select and stop the timer when camping on.

-When the timer expires or stops, the terminal releases information of a terminal internal variable (eg, VarMeasIdleConfig) that stores RRC idle mode or RRC inactive mode frequency measurement configuration information.

In the present invention, a method for rapidly performing frequency measurement and reporting in an RRC idle mode or an RRC inactive mode is proposed according to embodiments 1-4 of a specific terminal operation reporting a frequency measurement result for the first embodiment as follows.

-When the UE receives the RRCSetup message or the RRCResume message in message 4 from the base station, the following operation may be performed.

* 만약 시스템 정보(예를 들면 SIB2)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 지원한다는 지시자(IDLE or INACTIVE Mode Measurement)를 방송하고 또는 포함하고 있으며, 단말이 RRC 유휴 모드 또는 RRC 비활성화 모드에서 측정한 주파수 측정 결과를 가지고 있다면

* If the system information (for example, SIB2) broadcasts or includes an indicator (IDLE or INACTIVE Mode Measurement) that supports frequency measurement in RRC idle mode or RRC inactive mode, and the terminal is measured in RRC idle mode or RRC inactive mode If you have one frequency measurement result

** 단말은 메시지 5로 RRCSetupComplete 메시지 또는 RRCResumeComplete 메시지에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과가 있다는 지시자(idle or INACTIVE Measavailable)를 포함하여 상기 메시지를 구성한다. 따라서 상기 메시지로 기지국에게 보고할 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 정보가 있다는 것을 지시할 수 있다.

** The terminal configures the message by including an indicator (idle or INACTIVE Measavailable) indicating that there is an RRC idle mode or RRC inactive mode frequency measurement result in the RRCSetupComplete message or the RRCResumeComplete message as message 5. Accordingly, the message may indicate that there is RRC idle mode or RRC inactive mode frequency measurement information to be reported to the base station.

** 주파수 측정 결과를 보고할 것이기 때문에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정에 대한 타이머(예를 들면 T331)를 중지한다.

** Stop the timer for RRC idle mode or RRC deactivated mode frequency measurement (eg T331) because it will report the frequency measurement result.

-The terminal receives a message requesting information of the terminal from the base station (UE information request), in the message there is an indicator requesting the RRC idle mode or RRC deactivation mode frequency measurement result, and the terminal is in RRC idle mode or RRC deactivation mode If you have a frequency measurement result

* 단말은 단말의 정보를 전송하는 메시지(UE information response)에 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 포함하여 전송할 수 있으며, 상기 주파수 측정 결과는 기지국의 RRC 메시지 또는 시스템 정보에서 설정해준 주파수 리스트 또는 그룹 단위로 각각 측정 결과를 보고할 수 있다. 예를 들면 LTE 주파수 리스트 그룹과 NR 주파수 리스트 그룹에 대해 각각 측정 결과를 보고할 수 있으며, 제 1의 NR 주파수 리스트 그룹과 제 2의 NR 주파수 리스트 그룹에 대해서 각각 측정 결과를 보고할 수 있다.

* The terminal may transmit the RRC idle mode or RRC deactivation mode frequency measurement result in a message (UE information response) for transmitting the terminal information, and the frequency measurement result is a frequency list set in the RRC message or system information of the base station Alternatively, you can report each measurement result in groups. For example, measurement results may be reported for each of the LTE frequency list group and the NR frequency list group, and the measurement results may be reported for each of the first NR frequency list group and the second NR frequency list group.

* 상기에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 보고하면 단말은 상기 측정 보고를 기지국이 성공적으로 수신하였다는 응답(HARQ ACK 또는 RLC ACK)을 받으면 상기 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 단말 내부 변수에서 폐기할 수 있다.

* If the RRC idle mode or RRC deactivation mode frequency measurement result is reported above, the UE receives a response (HARQ ACK or RLC ACK) indicating that the base station has successfully received the measurement report, the RRC idle mode or RRC deactivation mode frequency measurement result Can be discarded in the terminal internal variable.

In the present invention, the LTE frequency list group or the NR frequency list group may be included in one configuration information and broadcast in the system information (SIB5), and the LTE frequency list group or the NR frequency list group may have different system information (e.g. For example, by broadcasting in SIB3 or SIB5 or other SIB), the terminal can be distinguished. In addition, the LTE frequency list group or the NR frequency list group may include inter-frequency configuration information (inter-frequency) as well as intra-frequency configuration information (intra-frequency).

2G is a diagram illustrating a case of performing unnecessary frequency measurement when a terminal performs frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention.

In Figure 2g, when the terminal receives the RRCRelease message, transitions to the RRC idle mode or RRC deactivation mode, and is instructed to measure the frequency of the RRC idle mode or the RRC deactivation mode, the terminal starts a timer (e.g., T331) and sets frequency configuration information. Frequency measurement can be started when received in the RRC message or system information. However, since the RRC idle mode or RRC inactive mode terminal has mobility, it can move to other cells and camp on.

If the UE camps on a cell that does not support RRC idle mode or RRC deactivation mode frequency measurement, or a cell (2g-10) that cannot receive the RRC idle mode or RRC disable mode frequency measurement result, the UE (2g-05) is RRC Even if the frequency measurement in the idle mode or RRC inactive mode is performed, the measurement result cannot be reported. That is, frequency measurement is unnecessary, thereby wasting the terminal battery.

Therefore, in order to solve the above problem, a system information-based terminal operation is additionally proposed as follows for the first embodiment of the present invention.

-If the UE performing RRC idle mode or RRC deactivation mode frequency measurement indicates that it does not support RRC idle mode or RRC disable mode frequency measurement in the system information (for example, SIB2) of the camped cell, or RRC idle Mode or RRC deactivation mode If the indication that the frequency measurement result cannot be reported (that the base station cannot receive or does not support)

* 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 타이머(T331)를 중지하고 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 중지할 수 있다. 또한 단말에 저장된 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 해제할 수 있다.

* The terminal may stop the timer (T331) for RRC idle mode or RRC deactivation mode frequency measurement and stop the RRC idle mode or RRC deactivation mode frequency measurement. In addition, the RRC idle mode or RRC deactivation mode frequency measurement configuration information stored in the terminal may be released.

In Figure 2h, when the terminal receives the RRCRelease message, transitions to the RRC idle mode or RRC deactivation mode, and is instructed to measure the frequency of the RRC idle mode or the RRC deactivation mode, the terminal starts a timer (e.g., T331) and sets frequency configuration information. Frequency measurement can be started when received in the RRC message or system information. However, since the RRC idle mode or RRC inactive mode terminal has mobility, it can move to other cells and camp on.

If the timer expires while the terminal performs RRC idle mode or RRC inactive mode frequency measurement, the terminal may store the measured measurement result. For example, the timer may expire in a cell of 2h-10. In addition, when the terminal moves again and camps on to another cell 2h-15 and performs a connection connection, a problem may occur that the terminal reports the measurement result measured in the 2h-10 cell to the cell 2h-15. That is, since the measurement results for a certain frequency may be different when measured in cells 2h-10 and 2h-15, incorrect information is reported. The above problem may also occur when the terminal leaves the region information set for frequency measurement in the RRC idle mode or the RRC inactive mode. That is, although the RRC idle mode or RRC inactive mode frequency measurement is performed and stored, the frequency measurement result may be reported in another cell outside the region set above.

Therefore, in order to solve the above problem, a system information-based terminal operation is additionally proposed as follows for the first embodiment of the present invention.

-If the timer (T331) for RRC idle mode or RRC inactive mode frequency measurement is stopped or expires (the cell does not support RRC idle mode or RRC inactive mode frequency measurement, or the terminal is out of the set region information Alternatively, the timer may be stopped when reporting of the frequency measurement result is complete)

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 중지할 수 있다. 또한 단말에 저장된 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 해제할 수 있다.

* RRC idle mode or RRC inactive mode frequency measurement can be stopped. In addition, the RRC idle mode or RRC deactivation mode frequency measurement configuration information stored in the terminal may be released.

* 또한 단말은 단말에 저장된 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 해제 또는 폐기할 수 있다.

* In addition, the terminal may release or discard the RRC idle mode or RRC deactivation mode frequency measurement result stored in the terminal.

Alternatively, even if the timer is stopped, the RRC idle mode or RRC deactivated mode frequency measurement result is not discarded, and time information (Time stamp) can be defined and included in the frequency measurement result. For example, the absolute time can be included in the frequency measurement result. That is, by defining a variable for recording the date, time, minute, and second, the base station receiving the frequency measurement information may check the absolute time information and determine the validity of the frequency measurement result. Alternatively, a relative time may be included in the frequency measurement result. For example, a time difference between a time point at which the frequency is measured and the measurement result is stored and the time at which the measurement result is reported can be reported as the relative time, and the base station checks the relative time information and determines the validity of the frequency measurement result. You can make it judge.

As another method, when the terminal is out of a designated area to perform the RRC idle mode or RRC deactivation mode frequency measurement configuration set in the RRCRelease message, the frequency measurement result stored in the terminal or the stored frequency configuration information may be discarded.

As another method, the UE does not indicate that the system information can report the RRC idle mode or RRC deactivation mode frequency measurement configuration result by checking the system information of the camped cell, or the RRC idle mode or RRC deactivation mode in the system information If the frequency measurement setting information (eg, a list of frequencies to be measured, etc.) is not broadcast, the terminal may discard the frequency measurement result stored in the terminal or the stored frequency setting information. In addition, when the terminal receives the RRCRelease message, if there is no RRC idle mode or RRC deactivation mode frequency measurement configuration information, the terminal may discard the frequency measurement result or stored frequency configuration information stored in the terminal. For example, if one or more of a plurality of conditions are satisfied as follows, the UE may stop RRC idle mode or RRC deactivation mode frequency measurement, or discard the frequency measurement result or stored frequency setting information stored in the UE. .

-If the UE does not indicate that the system information can report the result of the RRC idle mode or RRC inactive mode frequency measurement setting by checking the system information of the camped cell

-Or, if the system information does not broadcast RRC idle mode or RRC inactive mode frequency measurement setting information (e.g., a list of frequencies to be measured)

-Or, if there is no RRC idle mode or RRC disable mode frequency measurement setting information when receiving an RRCRelease message

-As another method, if the terminal is out of the designated area to perform the RRC idle mode or RRC deactivation mode frequency measurement configuration set in the RRCRelease message

* RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 중지할 수 있다. 또한 단말에 저장된 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 설정 정보를 해제할 수 있다.

* RRC idle mode or RRC inactive mode frequency measurement can be stopped. In addition, the RRC idle mode or RRC deactivation mode frequency measurement configuration information stored in the terminal may be released.

* 또한 단말은 단말에 저장된 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정 결과를 해제 또는 폐기할 수 있다.

* In addition, the terminal may release or discard the RRC idle mode or RRC deactivation mode frequency measurement result stored in the terminal.

As another method, a new timer is introduced to prevent reporting of old frequency measurement results, and a timer value is included in the frequency measurement configuration information for the RRC idle mode or RRC deactivation mode of the RRCRelease message. Can be set. The new timer may be used to indicate a period for determining validity of the frequency measurement result, and it may be determined that the stored frequency measurement result value is valid only when the new timer is running, and if the new timer expires The stored frequency measurement results can be discarded so that they are not reported to the base station.

In addition, the new timer may be driven for each terminal, and when a timer indicating the frequency measurement period expires or when frequency measurement is stopped, the new timer may be started. In addition, when the new timer expires, the stored frequency measurement results may be determined to be no longer valid and discarded. The new timer may be stopped when the UE receives a request to report the frequency measurement result from the base station while the new timer is running, or when the UE attempts to transmit the frequency measurement result to the base station by including it in an RRC message.

In addition, the new timer may be driven for each frequency or cell, and when the timer indicating the frequency measurement period expires or when the frequency measurement is stopped, the new timer may be started. Alternatively, a new timer corresponding to each cell or frequency may be started or restarted whenever a frequency measurement is performed for each cell or frequency and a new frequency measurement result is stored for each cell or frequency. When the new timer expires, the stored frequency measurement results for the cell or frequency of the target cell or frequency in which the new timer is driven may be determined to be invalid and discarded. The new timer may be stopped when the UE receives a request to report the frequency measurement result from the base station while the new timer is running, or when the UE tries to transmit the frequency measurement result to the base station by including it in the RRC message.

Figure 2i is when the UE temporarily camps on a cell that does not support RRC idle mode or RRC deactivation mode frequency measurement when the UE performs frequency measurement in the RRC idle mode or RRC inactive mode proposed in the present invention, and then returns to the supporting cell. It is a diagram explaining the problem of no longer performing frequency measurement.

In Figure 2i, when the terminal receives the RRCRelease message, transitions to the RRC idle mode or RRC deactivation mode, and is instructed to measure the frequency of the RRC idle mode or the RRC deactivation mode, the terminal starts a timer (for example, T331) and sets the frequency configuration information. Frequency measurement can be started when received in the RRC message or system information. However, since the RRC idle mode or RRC inactive mode terminal has mobility, it can move to other cells and camp on.

The terminal (2i-10, 2i-20) camps on to a cell that does not support RRC idle mode or RRC inactive mode frequency measurement, or to a cell (2i-03) that cannot receive frequency measurement results in RRC idle mode or RRC inactive mode. I can. For example, the timer may be stopped or expired in the cell of 2i-03. In addition, the terminal may move again and camp-on again in the cell of 2i-02 or 2i-04 supporting RRC idle mode or RRC deactivation mode frequency measurement.

As another example, the UEs 2i-10 and 2i-20 may camp on to another cell 2i-03 outside the region information set for frequency measurement in the RRC idle mode or the RRC inactive mode. In addition, the terminal may move again and return to the setting area information to perform camp-on.

As described above, the UE performing RRC idle mode or RRC deactivation mode frequency measurement camps on a cell that does not support RRC idle mode or RRC deactivation mode frequency measurement, or if the set area information is out or the timer expires, RRC If the terminal has high mobility because the idle mode or RRC inactive mode frequency measurement is not stopped and restarted, the gain of the RRC idle mode or RRC inactive mode frequency measurement proposed in the present invention cannot be seen.

Therefore, in order to solve the above problem, a system information-based terminal operation is additionally proposed as follows for the first embodiment of the present invention.

-If the UE is in the RRC idle mode or the RRC inactive mode timer (T331) for frequency measurement is stopped or expired (ie, the timer is not running), the UE is in the RRC idle mode or RRC in the system information of the camp-on cell If you indicate that it supports inactive mode frequency measurement

-Or, if the timer (T331) for frequency measurement in RRC idle mode or RRC inactive mode has been stopped or expired (that is, the timer is not running), in RRC idle mode or RRC inactive mode, in the region setting information for frequency measurement If the terminal camps on again in the included cell,

* 단말은 캠프온 한 셀의 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 주파수 측정 설정 정보를 수신 또는 획득하고 저장한다.

* The terminal receives, acquires, and stores frequency measurement configuration information for RRC idle mode or RRC inactive mode frequency measurement in system information (for example, SIB5) of one cell camped on.

* 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 타이머(T331) 시작한다.

* The terminal starts a timer (T331) for measuring the frequency of the RRC idle mode or RRC inactive mode.

* 상기 주파수 측정 설정 정보에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 수행한다.

* According to the frequency measurement setting information, frequency measurement in RRC idle mode or RRC inactive mode is performed.

As another method, even if the timer is running, if a predetermined condition is satisfied as in the following operation, the timer may be restarted to extend the RRC idle mode or RRC inactive mode frequency measurement time.

-If the terminal indicates that the system information of the camp-on cell supports RRC idle mode or RRC inactive mode frequency measurement

-Or, if the terminal camps on a cell included in the region setting information for RRC idle mode or RRC inactive mode frequency measurement

* 만약 RRCRelease 메시지에서 주파수 측정 설정 정보를 설정해주지 않았다면 또는 RRCRelease 메시지에서 주파수 측정 설정 정보를 설정해주었지만 타이머가 만료한 경우,

* If the frequency measurement configuration information is not set in the RRCRelease message, or the frequency measurement configuration information is set in the RRCRelease message, but the timer expires,

** 단말은 캠프온 한 셀의 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 주파수 측정 설정 정보를 수신 또는 획득하고 저장한다.

** The terminal receives or acquires and stores the frequency measurement configuration information for the RRC idle mode or RRC inactive mode frequency measurement in the system information (for example, SIB5) of the camped cell.

** 단말은 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 타이머(T331) 시작 또는 재시작한다.

** The terminal starts or restarts a timer (T331) for frequency measurement in an RRC idle mode or an RRC inactive mode.

** 상기 주파수 측정 설정 정보에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 수행한다.

** According to the frequency measurement setting information, frequency measurement in RRC idle mode or RRC inactive mode is performed.

As another method, when region setting information (configuration information for a region in which the frequency measurement configuration is valid) in the RRC idle mode or RRC deactivated mode frequency measurement configuration information in the RRCRelease message is set in the terminal, the cell in which the terminal camps While the timer indicating the frequency measurement period based on the system information or the cell identifier of is running (if the timer has not expired), the RRC idle mode or the RRC inactive mode frequency measurement may be stopped or restarted. Specifically, the RRC idle mode or RRC inactive mode UE continues to measure the frequency if the physical cell identity of the serving cell camped on while moving while performing a cell selection or reselection procedure is included in the region configuration information. And continuously driving a timer indicating a period of frequency measurement. However, if the RRC idle mode or RRC inactive mode UE moves while performing a cell selection or reselection procedure, and the physical cell identity of the serving cell camped on is not included in the region configuration information, the frequency measurement is performed. Stopping and indicating the duration of the frequency measurement, the timer may be characterized in that it continues to run, and also maintaining the frequency measurement setting information set in the RRC message (frequency measurement information (or frequency measurement list) was set in the RRC message. If the terminal reselects a cell having a cell identifier included in the region setting information and camps on again, while the timer is running (if the timer has not expired), It may be characterized in that the frequency measurement is restarted. In addition, the frequency measurement setting information may be canceled or discarded when a timer indicating the frequency measurement period expires.

- 1> If the terminal indicates that the system information of the camp-on cell supports RRC idle mode or RRC deactivation mode frequency measurement, or if the timer for frequency measurement is running (if the timer for frequency measurement has not expired)_

- 1> Or, if the UE camps on a cell having a frequency or cell identifier included in the region setting information (configuration information set in the RRC message (for example, RRCRelease)) for frequency measurement in the RRC idle mode or RRC inactive mode, or If you camp on again or if the timer for frequency measurement is running (if the timer for frequency measurement has not expired)_

* 2> 만약 기지국이 RRCRelease 메시지에서 주파수 측정 설정 정보를 설정해주지 않았다면 또는 단말이 상기 RRCRelease 메시지로 주파수 측정 설정(또는 주파수 측정 리스트)를 받지 않았다면

* 2> If the base station does not set the frequency measurement configuration information in the RRCRelease message, or the terminal does not receive the frequency measurement configuration (or frequency measurement list) through the RRCRelease message

** 3> 단말은 캠프온 한 셀의 시스템 정보(예를 들면 SIB5)에서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 위한 주파수 측정 설정 정보를 수신 또는 획득하고 저장한다.

** 3> The terminal receives or acquires and stores the frequency measurement configuration information for the RRC idle mode or RRC inactive mode frequency measurement in the system information (for example, SIB5) of the camp-on cell.

** 3> 상기 주파수 측정 설정 정보에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 수행한다 또는 재시작한다.

** 3> RRC idle mode or RRC inactive mode frequency measurement is performed or restarted according to the frequency measurement setting information.

* 2> 만약 기지국이 RRCRelease 메시지에서 주파수 측정 설정 정보를 설정해주었다면 또는 단말이 상기 RRCRelease 메시지로 주파수 측정 설정(또는 주파수 측정 리스트)를 받았다면 또는 주파수 측정을 위한 타이머가 구동 중이라면(주파수 측정을 위한 타이머가 만료되지 않았다면)_

* 2> If the base station sets the frequency measurement configuration information in the RRCRelease message, or the terminal receives the frequency measurement configuration (or frequency measurement list) through the RRCRelease message, or if the timer for frequency measurement is running (frequency measurement is performed) If the timer for has not expired)_

** 3> 상기 RRCRelease 메시지에서 설정된 주파수 측정 설정 정보에 따라서 RRC 유휴 모드 또는 RRC 비활성화 모드 주파수 측정을 수행한다 또는 재시작한다.

** 3> RRC idle mode or RRC inactive mode frequency measurement is performed or restarted according to the frequency measurement configuration information set in the RRCRelease message.

- 1> If the terminal does not indicate that the system information of the camp-on cell supports RRC idle mode or RRC deactivation mode frequency measurement, or if the timer for frequency measurement is running (if the timer for frequency measurement has not expired) _

- 1> Or, if the UE camps on a cell having a frequency or cell identifier not included in the region setting information for frequency measurement in the RRC idle mode or RRC inactive mode (configuration information set in the RRC message (for example, RRCRelease)) Or if you camp on again or if the timer for frequency measurement is running (if the timer for frequency measurement has not expired)_

* 단말은 상기 RRC 유휴 모드 또는 RRC 비활성화 모드를 위한 주파수 측정을 중지한다.

* The terminal stops frequency measurement for the RRC idle mode or RRC deactivation mode.

* (주파수 측정 기간을 나타내는 타이머는 구동하던 것을 계속 구동하는 것을 특징으로 한다)

* (The timer indicating the frequency measurement period is characterized by continuing to drive what was being driven)

FIG. 2j is a diagram illustrating a terminal operation for performing frequency measurement in an RRC idle mode or an RRC inactive mode proposed in the present invention and reporting a measurement result.

In FIG. 2j, when the UE receives an RRC message, it drives a timer for RRC idle mode or RRC inactive mode frequency measurement, and if there is frequency measurement configuration information for RRC idle mode or RRC inactive mode frequency measurement in the RRC message (2j-05 ) RRC idle mode or RRC inactive mode frequency measurement is performed based on the information (2j-10). If there is no frequency measurement configuration information for RRC idle mode or RRC deactivation mode frequency measurement in the RRC message, the frequency measurement information is received from system information (2j-05) to perform frequency measurement in RRC idle mode or RRC inactive mode. Can be (2j-10). In addition, the UE stores the measurement result when performing frequency measurement, and if there is an indicator that the RRC idle mode or RRC inactive mode frequency measurement is supported in the system information of the cell establishing the connection with the network, message 4 when establishing the connection with the network Is received and the timer is stopped (2j-15), and message 5 may inform that there is a result of the frequency measurement in the RRC idle mode or the RRC inactive mode. And when the base station requests the RRC idle mode or RRC inactive mode frequency measurement result, the measurement result is reported (2j-20), and when the measurement result is successfully transmitted to the base station, the UE discards the measurement result.

2K shows a structure of a terminal to which an embodiment of the present invention can be applied.

Referring to the drawing, the terminal includes a radio frequency (RF) processing unit 2k-10, a baseband processing unit 2k-20, a storage unit 2k-30, and a control unit 2k-40. .

The RF processor 2k-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 processor 2k-10 converts the baseband signal provided from the baseband processor 2k-20 to an RF band signal, transmits it through an antenna, and transmits the RF band signal through the antenna. Downconvert to baseband signal. For example, the RF processing unit 2k-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), and an analog to digital converter (ADC). Can be. In the figure, only one antenna is shown, but the terminal may have multiple antennas. In addition, the RF processing unit 2k-10 may include a plurality of RF chains. Furthermore, the RF processing unit 2k-10 may perform beamforming. For the beamforming, the RF processing unit 2k-10 may adjust a phase and a magnitude of signals transmitted and received through a plurality of antennas or antenna elements. In addition, the RF processor may perform MIMO, and may receive multiple layers when performing MIMO operations. The RF processing unit 2k-10 may perform reception beam sweeping by appropriately setting a plurality of antennas or antenna elements under the control of the controller, or adjust the direction and beam width of the reception beam so that the reception beam cooperates with the transmission beam. have.

The baseband processor 2k-20 performs a conversion function between a baseband signal and a bit stream according to a physical layer standard of the system. For example, when transmitting data, the baseband processor 2k-20 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processor 2k-20 restores the received bit stream through demodulation and decoding of the baseband signal provided from the RF processor 2k-10. For example, in the case of the OFDM (orthogonal frequency division multiplexing) method, when transmitting data, the baseband processing unit 2k-20 generates complex symbols by encoding and modulating a transmission bit stream, and subcarriers of the complex symbols After mapping to, OFDM symbols are constructed through an inverse fast Fourier transform (IFFT) operation and a cyclic prefix (CP) insertion. In addition, when receiving data, the baseband processing unit 2k-20 divides the baseband signal provided from the RF processing unit 2k-10 into units of OFDM symbols, and transmits to the subcarriers through fast Fourier transform (FFT) operation. After restoring the mapped signals, the received bit stream is reconstructed through demodulation and decoding.

The baseband processing unit 2k-20 and the RF processing unit 2k-10 transmit and receive signals as described above. Accordingly, the baseband processor 2k-20 and the RF processor 2k-10 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 2k-20 and the RF processor 2k-10 may include a plurality of communication modules to support a plurality of different radio access technologies. Further, at least one of the baseband processor 2k-20 and the RF processor 2k-10 may include different communication modules to process signals of different frequency bands. For example, the different radio access technologies may include LTE networks, NR networks, and the like. Also, the different frequency bands may include a super high frequency (SHF) band (eg, 2.5 GHz, 5 Ghz), and a millimeter wave (eg, 60 GHz) band.

The storage unit 2k-30 stores data such as a basic program, an application program, and setting information for the operation of the terminal. The storage unit 2k-30 provides stored data at the request of the control unit 2k-40.

The control unit 2k-40 controls overall operations of the terminal. For example, the control unit 2k-40 transmits and receives signals through the baseband processing unit 2k-20 and the RF processing unit 2k-10. Also, the control unit 2k-40 writes and reads data in the storage unit 2k-40. To this end, the control unit 2k-40 may include at least one processor. For example, the controller 2k-40 may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls an upper layer such as an application program.

2L illustrates a block configuration of TRP in a wireless communication system to which an embodiment of the present invention can be applied.

As shown in the figure, the base station includes an RF processing unit 2l-10, a baseband processing unit 2l-20, a backhaul communication unit 2l-30, a storage unit 2l-40, and a control unit 2l-50 It is configured to include.

The RF processor 2l-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 processor 2l-10 up-converts the baseband signal provided from the baseband processor 2l-20 into an RF band signal, transmits it through an antenna, and transmits an RF band signal through the antenna. Downconverts to baseband signal. For example, the RF processing unit 2l-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. In the figure, only one antenna is shown, but the first access node may include multiple antennas. Also, the RF processor 2l-10 may include a plurality of RF chains. Furthermore, the RF processor 2l-10 may perform beamforming. For the beamforming, the RF processor 2l-10 may adjust the phase and magnitude of each of signals transmitted and received through multiple antennas or antenna elements. The RF processing unit may perform a downlink MIMO operation by transmitting one or more layers.

The baseband processing unit 2l-20 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the first wireless access technology. For example, when transmitting data, the baseband processing unit 2l-20 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit 2l-20 restores a received bit stream through demodulation and decoding of the baseband signal provided from the RF processing unit 2l-10. For example, according to the OFDM scheme, when transmitting data, the baseband processor 2l-20 generates complex symbols by encoding and modulating a transmission bit string, mapping the complex symbols to subcarriers, and then IFFT OFDM symbols are constructed through arithmetic and CP insertion. In addition, when receiving data, the baseband processor 2l-20 divides the baseband signal provided from the RF processor 2l-10 into units of OFDM symbols and restores signals mapped to subcarriers through FFT operation. After that, the received bit stream is restored through demodulation and decoding. The baseband processor 2l-20 and the RF processor 2l-10 transmit and receive signals as described above. Accordingly, the baseband processing unit 2l-20 and the RF processing unit 2l-10 may be referred to as a transmission unit, a reception unit, a transmission/reception unit, a communication unit, or a wireless communication unit.

The communication unit 2l-30 provides an interface for performing communication with other nodes in the network.

The storage unit 2l-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 2l-40 may store information about bearers allocated to the connected terminal, measurement results reported from the connected terminal, and the like. In addition, the storage unit 2l-40 may store information that is a criterion for determining whether to provide multiple connections to the terminal or to stop. Then, the storage unit 2l-40 provides stored data at the request of the control unit 2l-50.

The control unit 2l-50 controls overall operations of the main station. For example, the control unit 2l-50 transmits and receives signals through the baseband processing unit 2l-20 and the RF processing unit 2l-10 or through the backhaul communication unit 2l-30. In addition, the control unit 2l-50 records and reads data in the storage unit 2l-40. To this end, the control unit 2l-50 may include at least one processor.

Claims (1)

In the 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
And transmitting a second control signal generated based on the processing to the base station.

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