KR20230085743A - An operation method related to the reception of a small amount of data in a wireless communication system - Google Patents

Abstract

One embodiment is a method of operating a User Equipment (UE) related to paging and small data transmission in a wireless communication system, wherein the UE receives a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell, wherein the cell reselection is to select one of a 5G base station and an LTE base station, and the UE selects an LTE base station based on the fact that the paging message is related to small data. way to choose.

Description

An operation method related to the reception of a small amount of data in a wireless communication system

The following description relates to a wireless communication system, and more specifically, to a method and apparatus for receiving a small amount of data in an RRC idle or RRC inactive state of a 5G cell.

In wireless communication systems, various radio access technologies (RATs) such as LTE, LTE-A, and WiFi are used, including 5G. The three main requirement areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Hyper-reliability and It includes the Ultra-reliable and Low Latency Communications (URLLC) area. Some use cases may require multiple areas for optimization, while other use cases may focus on just one key performance indicator (KPI). 5G supports these diverse use cases in a flexible and reliable way.

The embodiment (s) proposes a method for receiving a small amount of data in the RRC idle, RRC inactive state of the 5G cell as a technical task.

One embodiment is a method of operating a User Equipment (UE) related to paging and small data transmission in a wireless communication system, wherein the UE receives a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell, wherein the cell reselection is to select one of a 5G base station and an LTE base station, and the UE selects an LTE base station based on the fact that the paging message is related to small data. way to choose.

One embodiment, in a wireless communication system, in User Equipment (UE), at least one processor; and at least one computer memory operably coupled to the at least one processor, storing instructions that when executed cause the at least one processor to perform operations comprising: receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell, wherein the cell reselection is to select one of a 5G base station and an LTE base station, and the UE selects an LTE base station based on the fact that the paging message is related to small data. It is the UE that chooses.

One embodiment is a processor for performing operations for a User Equipment (UE) in a wireless communication system, the operations comprising: receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell, wherein the cell reselection is to select one of a 5G base station and an LTE base station, and the UE selects an LTE base station based on the fact that the paging message is related to small data. It is the processor that chooses.

One embodiment is a non-volatile computer readable storage medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a relay UE, The operations may include receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell, wherein the cell reselection is to select one of a 5G base station and an LTE base station, and the UE selects an LTE base station based on the fact that the paging message is related to small data. It is a storage medium of choice.

The small data may be one of Short Message Service (SMS), messenger-related data, and application update-related information.

Whether the small data is smaller than a preset threshold may be determined by a network.

The threshold may be determined by a network operator.

If the UE is connected to LTE when receiving the paging message, the cell reselection may not be performed.

The paging message may include a data size related cause.

The cause may be set as small data when the small data is smaller than a preset threshold.

The paging message may include an indicator indicating small data.

According to an embodiment, when accessing 5G even in the case of a small amount of data, it is possible to solve the disadvantage that the bandwidth of the 5G frequency is wide and the battery consumption is high.

The drawings accompanying this specification are intended to provide understanding of the embodiment(s), show various embodiments, and explain principles together with the description of the specification.
1 shows a structure of a radio frame of NR to which an embodiment of the present disclosure can be applied.
2 shows a slot structure of an NR frame according to an embodiment of the present disclosure.
3 to 5 are diagrams for explaining the embodiment(s).
6 is a diagram illustrating a device to which the embodiment(s) may be applied.

In various embodiments of the present disclosure, “/” and “,” should be interpreted as indicating “and/or”. For example, “A/B” may mean “A and/or B”. Further, “B” may mean “A and/or B”. Furthermore, “” may mean “at least one of A, B and/or C”. Furthermore, “B, C” may mean “at least one of A, B and/or C”.

In various embodiments of the present disclosure, “or” should be interpreted as indicating “and/or”. For example, “A or B” may include “only A,” “only B,” and/or “both A and B.” In other words, "or" should be interpreted as indicating "in addition or alternatively."

The following technologies include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used in various wireless communication systems. CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented with a wireless technology such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like. IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e. UTRA is part of the universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), adopting OFDMA in downlink and SC in uplink -Adopt FDMA. LTE-A (advanced) is an evolution of 3GPP LTE.

5G NR, a successor to LTE-A, is a new clean-slate mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, including low-frequency bands below 1 GHz, medium-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

For clarity of description, LTE-A or 5G NR is mainly described, but the technical idea according to an embodiment of the present disclosure is not limited thereto.

According to the structure of the conventional LTE system, the E-UTRAN includes a base station providing a control plane and a user plane to the terminal. A terminal may be fixed or mobile, and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. A base station refers to a fixed station that communicates with a terminal, and may be called other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.

Base stations 20 may be connected to each other through an X2 interface. The base station 20 is connected to an Evolved Packet Core (EPC) through an S1 interface, more specifically, a Mobility Management Entity (MME) through an S1-MME, and a Serving Gateway (S-GW) through an S1-U.

EPC consists of MME, S-GW, and Packet Data Network-Gateway (P-GW). The MME has access information of the terminal or information about the capabilities of the terminal, and this information is mainly used for mobility management of the terminal. The S-GW is a gateway having E-UTRAN as an endpoint, and the P-GW is a gateway having PDN (Packet Date Network) as an endpoint.

The layers of the Radio Interface Protocol between the terminal and the network are based on the lower 3 layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems, It can be divided into L2 (second layer) and L3 (third layer). Among them, the physical layer belonging to the first layer provides an information transfer service using a physical channel, and the RRC (Radio Resource Control) layer located in the third layer provides radio resources between the terminal and the network. plays a role in controlling To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

1 shows a structure of a radio frame of NR to which embodiment(s) can be applied.

Referring to FIG. 1, radio frames may be used in uplink and downlink transmission in NR. A radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (Half-Frame, HF). A half-frame may include five 1ms subframes (Subframes, SFs). A subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

When a normal CP is used, each slot may include 14 symbols. When an extended CP is used, each slot may include 12 symbols. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).

Table 1 below shows the number of symbols per slot (N ^slot _symb ), the number of slots per frame (N ^frame,u _slot ) and the number of slots per subframe (N ^{subframe, u} _slot ) is exemplified.

SCS (15*2u) N- ^slot _symb N ^{frame, u} _slot N ^{subframe, u} _slot 15KHz (u=0) 14 10 One 30KHz (u=1) 14 20 2 60KHz (u=2) 14 40 4 120KHz (u=3) 14 80 8 240KHz (u=4) 14 160 16

Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS when the extended CP is used.

SCS(15*2^u) N- ^slot _symb N ^{frame, u} _slot N ^{subframe, u} _slot 60KHz (u=2) 12 40 4

In the NR system, OFDM(A) numerology (eg, SCS, CP length, etc.) may be set differently among a plurality of cells merged into one UE. Accordingly, the (absolute time) interval of time resources (e.g., subframes, slots, or TTIs) (for convenience, collectively referred to as TU (Time Unit)) composed of the same number of symbols may be set differently between merged cells. . In NR, multiple numerologies or SCSs to support various 5G services can be supported. For example, when the SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when the SCS is 30 kHz/60 kHz, dense-urban, lower latency latency and wider carrier bandwidth may be supported. When the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.

An NR frequency band may be defined as two types of frequency ranges. The two types of frequency ranges may be FR1 and FR2. The number of frequency ranges may be changed, and for example, the two types of frequency ranges may be shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "6 GHz range" and FR2 may mean "6 GHz range" and may be called millimeter wave (mmW).

Frequency range designation Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz - 6000MHz 15, 30, 60 kHz FR2 24250MHz - 52600MHz 60, 120, 240 kHz

As described above, the number of frequency ranges of the NR system can be changed. For example, FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, and may be used, for example, for vehicle communication (eg, autonomous driving).

Frequency range designation Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz - 7125MHz 15, 30, 60 kHz FR2 24250MHz - 52600MHz 60, 120, 240 kHz

2 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure. Referring to FIG. 2, a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot may include 12 symbols. Alternatively, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.

3 shows a connection process in a radio resource control (RRC) layer.

As shown in FIG. 3, the RRC state is shown according to whether or not RRC is connected. The RRC state refers to whether or not an entity of the RRC layer of the UE has a logical connection with an entity of the RRC layer of the eNodeB. The state in which it is not is called the RRC idle state.

Since the UE in the Connected state has an RRC connection, the E-UTRAN can grasp the existence of the corresponding UE in units of cells, and thus can effectively control the UE. On the other hand, the UE in idle state cannot be identified by the eNodeB, and is managed by the Core Network in units of a tracking area, which is a larger area unit than a cell. The tracking area is a set unit of cells. That is, the presence or absence of UEs in an idle state is determined only in a large regional unit, and the UE must transition to a connected state in order to receive a normal mobile communication service such as voice or data.

When the user first powers on the UE, the UE first searches for a suitable cell and then stays in an idle state in that cell. When the UE staying in the idle state needs to establish an RRC connection, it establishes an RRC connection with the RRC layer of the eNodeB through an RRC connection procedure and transitions to an RRC connected state. .

There are several cases in which the UE in the idle state needs to establish an RRC connection. In this case, a response message may be transmitted.

In order for a UE in an idle state to establish an RRC connection with the eNodeB, an RRC connection procedure must be performed as described above. The RRC connection process is largely the process of the UE sending an RRC connection request message to the eNodeB, the process of the eNodeB sending an RRC connection setup message to the UE, and the UE completing the RRC connection setup to the eNodeB. (RRC connection setup complete) message transmission process. This process will be described in detail with reference to FIG. 3 as follows.

1) When a UE in idle state wants to establish an RRC connection for reasons such as a call attempt, data transmission attempt, or eNodeB's response to paging, the UE first sends an RRC connection request message Send to eNodeB.

2) Upon receiving an RRC connection request message from the UE, the eNB accepts the RRC connection request of the UE when radio resources are sufficient, and transmits an RRC connection setup message as a response message to the UE. .

3) When the UE receives the RRC connection setup message, it transmits an RRC connection setup complete message to the eNodeB. When the UE successfully transmits the RRC connection setup message, the UE establishes an RRC connection with the eNodeB and transitions to the RRC connected mode.

According to the prior art, a 5G SA (Standalone) terminal is in an RRC idle or RRC inactive state in which radio resources are released, and when a small amount of data arrives, it receives a paging message from the network to wake up the terminal, connects to the 5G NR cell, and enters the RRC connected state. After receiving the data. In general, considering that 5G frequencies have a wide bandwidth and high battery consumption, it is much more advantageous in terms of battery efficiency to use LTE access for receiving small amounts of data in the form of KakaoTalk or simple messages, but such technology is not standard or even in the industry. am.

Therefore, in an embodiment of the present invention, a method for adaptively accessing LTE when a 5G SA terminal receives a small amount of data in an RRC idle or RRC inactive state of a 5G cell will be described.

An operation method of a User Equipment (UE) related to paging and small data transmission according to an embodiment is illustrated in FIG. 4 .

The UE receives a paging message (S401). Based on the fact that the paging message is related to small data, cell reselection is performed (S402). Thereafter, the UE may receive the small data from the reselected cell (S403).

Here, the cell reselection is to select one of a 5G base station and an LTE base station, and the UE may select an LTE base station based on the fact that the paging message is related to small data.

The small data may be one of Short Message Service (SMS), messenger-related data, and application update-related information.

Whether the small data is smaller than a preset threshold may be determined by a network. Also, the threshold may be determined by a network operator. In this case, the network operator can determine small data to be received through the LTE cell according to the operator's policy as needed.

If the UE is connected to LTE when receiving the paging message, the cell reselection may not be performed. This is because there is no need to perform a cell reselection procedure if the user is already connected to an LTE cell. However, this may be set differently depending on the terminal or network selection.

Meanwhile, the paging message may include a data size related cause. The cause may be set as small data when the small data is smaller than a preset threshold.

Alternatively, instead of a cause related to data size, the paging message may include an indicator indicating small data. In addition, the paging message can notify that the purpose/reason/cause of paging is small data in various ways, and it can be seen that these various ways are included in the scope of the present invention.

In summary, when a 5G SA terminal uses data and there is no data to be received or transmitted, it transitions to an RRC idle or RRC inactive state. At this time, when data arrives, the network sends a paging message to the terminal find and awaken If the cause is marked as (small data) in this Paging message, the terminal receives this message and finds and connects to a 5G NR cell that consumes a lot of battery and enters the RRC connected state. A small amount of data reception can be digested only by using the battery.

With this configuration, even in the case of a small amount of data, when accessing 5G, it is possible to solve the disadvantage that the 5G frequency has a wide bandwidth and consumes a lot of battery. In addition, there is an advantage in that a communication service provider can perform optimization by arbitrarily changing and adjusting a threshold for the amount of received data.

5 shows a flow chart according to an embodiment. Referring to FIG. 5 , when an event in which the 5G SA terminal receives a very small message such as KakaoTalk, text, or application update occurs in S501, the 5G Core evaluates whether the size of the corresponding data is sufficiently small. If the size of the sensitive data is sufficiently small (if data size < Threshold), small data can be marked as a cause in the paging message and transmitted (S502).

When the UE receives the paging message and the cause is small data, it can find and access (inter-RAT reselection) a 4G eNB cell without requesting radio resources from the 5G gNB (S403).

After that, data can be received in the 4G LTE state (S404).

Examples of wireless devices to which the present invention is applied

6 illustrates a wireless device that can be applied to the present invention.

Referring to FIG. 6 , the first wireless device 100 and the second wireless device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE, NR). Here, {the first wireless device 100, the second wireless device 200} is the {wireless device 100x, the base station 200} of FIG. 14 and/or the {wireless device 100x, the wireless device 100x. } can correspond.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108. The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106. In addition, the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 . For example, memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them. Here, the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 . The transceiver 106 may include a transmitter and/or a receiver. The transceiver 106 may be used interchangeably with a Radio Frequency (RF) unit. In the present invention, a wireless device may mean a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208. Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206. In addition, the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 . The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 . For example, memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them. Here, the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 . The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present invention, a wireless device may mean a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited to this, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein. can create One or more processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams disclosed herein. One or more processors 102, 202 generate PDUs, SDUs, messages, control information, data or signals (e.g., baseband signals) containing information according to the functions, procedures, proposals and/or methods disclosed herein , can be provided to one or more transceivers 106, 206. One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein PDUs, SDUs, messages, control information, data or information can be obtained according to these.

One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs). may be included in one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be included in one or more processors 102, 202 or stored in one or more memories 104, 204 and It can be driven by the above processors 102 and 202. The descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.

One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof. One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.

One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts herein, to one or more other devices. One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed herein from one or more other devices. there is. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 via one or more antennas 108, 208, as described herein, function. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal. One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.

100: first device
200: second device

Claims (18)

In a method of operating a user equipment (UE) related to paging and small data transmission in a wireless communication system,
the UE receives a paging message;
performing cell reselection based on that the paging message is related to small data;
receiving the small data from the reselected cell;
Including,
The cell reselection is to select one of a 5G base station and an LTE base station,
The UE selects an LTE base station based on that the paging message is related to small data. According to claim 1,
The small data is one of SMS (Short Message Service), messenger-related data, and application update-related information. According to claim 1,
Whether the small data is smaller than a preset threshold is determined by the network. According to claim 1,
Wherein the threshold is determined by a network operator. According to claim 1,
If the UE is connected to LTE when receiving the paging message, the cell reselection is not performed. According to claim 1,
The method of claim 1, wherein the paging message includes a data size related cause. According to claim 5,
Wherein the cause is set to small data when the small data is smaller than a preset threshold. According to claim 1,
The paging message includes an indicator indicating small data. In a wireless communication system, in User Equipment (UE),
at least one processor; and
at least one computer memory operably coupled to the at least one processor, wherein the at least one computer memory stores instructions which, when executed, cause the at least one processor to perform operations;
The operations may include receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell;
The cell reselection is to select one of a 5G base station and an LTE base station,
The UE selects an LTE base station based on that the paging message is related to small data. According to claim 9,
The small data is one of SMS (Short Message Service), messenger-related data, and application update-related information. According to claim 9,
Whether the small data is less than a preset threshold is determined by the network, the UE. According to claim 9,
The UE, wherein the threshold is determined by a network operator. According to claim 9,
If the UE is connected to LTE when receiving the paging message, the cell reselection is not performed. In the ninth,
The paging message includes a data size related cause, UE. According to claim 14,
The cause is set to small data when the small data is smaller than a preset threshold. According to claim 9,
The paging message includes an indicator indicating small data, UE. In a wireless communication system, in a processor for performing operations for User Equipment (UE),
The operations may include receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell;
The cell reselection is to select one of a 5G base station and an LTE base station,
The UE selects an LTE base station based on that the paging message is related to small data. A non-volatile computer readable storage medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a relay UE,
The operations may include receiving a paging message; performing cell reselection based on that the paging message is related to small data; Receiving the small data from the reselected cell;
The cell reselection is to select one of a 5G base station and an LTE base station,
The UE selects an LTE base station based on that the paging message is related to small data.

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