KR20230085742A - An operating method related to carrier aggregation and transmission power in a wireless communication system - Google Patents

Abstract

In accordance with one embodiment, an operation method of user equipment (UE) related to carrier aggregation and transmission power in a wireless communication system, includes: a step in which UE measures first signal intensity and second signal intensity; a step in which the UE compares the first signal intensity and second signal intensity with a first threshold value and a second threshold value, respectively; a step in which the UE determines transmission power to be used for Pcell, based on the comparison result; and a step in which the UE performs uplink transmission using the transmission power, wherein when the first signal intensity is greater than the first threshold value and the second signal intensity is greater than the second threshold value, the UE uses transmission power for Pcell by an amount excluding predetermined power from maximum transmission power. Therefore, the present invention is capable of having optimal performance by 2TX transmission and 1TX transmission depending on environments.

Description

An operating method related to carrier aggregation and transmission power in a wireless communication system {An operating method related to carrier aggregation and transmission power in a wireless communication system}

The following description relates to a wireless communication system, and more specifically, to a method and apparatus for determining transmission power of each cell based on signal strength in a carrier aggregation situation.

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.

Embodiment(s) proposes a method for determining transmission power of each cell based on signal strength in a carrier aggregation situation as a technical task.

An embodiment is a method of operating a user equipment (UE) related to transmission power distribution in carrier aggregation in a wireless communication system, wherein the UE measures first signal strength and second signal strength; The UE compares the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively; determining, by the UE, transmit power to be used for the Pcell based on the comparison result; The UE performs uplink transmission using the transmit power, and when the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE transmits to the Pcell This is a method of using transmission power of a size excluding a predetermined power from maximum transmission power.

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, wherein the at least one computer memory stores instructions that, when executed, cause the at least one processor to perform operations, the operations comprising: a first signal strength and a first signal strength; measuring the second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively; based on the comparison result, determining transmit power to be used for the Pcell; and performing uplink transmission using the transmit power, and when the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE transmits maximum transmit power to the Pcell. It is a UE that uses transmit power of a size excluding a predetermined power in .

One embodiment is a processor for performing operations for User Equipment (UE) in a wireless communication system, the operations comprising: measuring a first signal strength and a second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively; based on the comparison result, determining transmit power to be used for the Pcell; and performing uplink transmission using the transmit power, and when the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE transmits maximum transmit power to the Pcell. It is a processor that uses transmission power of a size excluding a predetermined power in .

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 above operations may include measuring a first signal strength and a second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively; based on the comparison result, determining transmit power to be used for the Pcell; and performing uplink transmission using the transmit power, and when the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE transmits maximum transmit power to the Pcell. It is a storage medium that uses a transmission power of a size excluding a predetermined power in .

The UE may use the predetermined power for transmission related to the Scell.

The operation may be performed only when carrier aggregation is activated.

When the first signal strength is less than the first threshold and the second signal strength is less than the second threshold, maximum transmission power may be used for the Pcell.

The UE may not perform Scell transmission when maximum transmission power is used for the Pcell.

The first threshold may be Reference Signal Received Power (RSRP), and the first threshold may be Signal to Interference and Noise Ratio (SINR).

The first threshold and the second threshold may be indicated by RRC signaling.

The first threshold may be determined based on a cell boundary of the Pcell, and the second threshold may be determined in consideration of an interference situation.

The predetermined power may correspond to 3dB.

According to an embodiment, the UE can achieve optimal performance by adaptively selecting 2TX transmission and 1TX transmission using UL CA according to the environment in the cell.

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 6 are diagrams for explaining the embodiment(s).
7 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.

A carrier includes a plurality of subcarriers in the frequency domain. A resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.) there is. A carrier may include up to N (eg, 5) BWPs. Data communication may be performed through an activated BWP. Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.

Meanwhile, a radio interface between a terminal and a terminal or a radio interface between a terminal and a network may be composed of an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may mean a physical layer. Also, for example, the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. Also, for example, the L3 layer may mean an RRC layer.

Carrier Aggregation (CA)

NR can support a wider uplink/downlink bandwidth by aggregating a plurality of uplink/downlink carriers (ie, carrier aggregation). It is possible to transmit/receive signals in a plurality of carriers through carrier aggregation. When carrier aggregation is applied, each carrier (see FIG. A2) may be referred to as a component carrier (CC). CCs may be adjacent or non-adjacent to each other in the frequency domain. The bandwidth of each CC can be determined independently. Asymmetric carrier aggregation in which the number of UL CCs and the number of DL CCs are different is also possible. In NR, radio resources are divided/managed into cells, and a cell may consist of 1 DL CC and 0 to 2 UL CCs. For example, a cell may consist of (i) only one DL CC, (ii) one DC CC and one UL CC, or (ii) one DL CC and two UL CCs (one supplementary UL CC). including CC). Cells are classified as: In this specification, a cell may be interpreted according to context, and may mean, for example, a serving cell. In addition, unless otherwise stated, the operations of this specification may be applied to each serving cell.

- PCell (Primary Cell): In the case of a terminal for which carrier aggregation is set, the primary frequency at which the terminal performs an initial connection establishment procedure or initiates a connection re-establishment procedure (eg, Primary Component A cell operating on a carrier, PCC). In the case of DC (Dual Connectivity), a Master Cell Group (MCG) cell operating at a primary frequency in which a UE performs an initial connection establishment procedure or initiates a connection re-establishment procedure.

- SCell (Secondary Cell): In the case of a terminal in which carrier aggregation is set, a cell that provides radio resources in addition to the special cell.

- PSCell (Primary SCG Cell): In the case of DC, when performing RRC reconfiguration and synchronization processes, a SCG (Secondary Cell Group) cell to which the terminal performs random access.

- Special Cell (SpCell): In the case of DC, the special cell represents the MCG's PCell or the SCG's PSCell. Otherwise (ie, non-DC), the special cell represents the PCell.

- Serving Cell (ServCell): Indicates a cell configured for a UE in an RRC_CONNECTED state. When CA/DC is not configured, only one serving cell (ie, PCell) exists. When CA/DC is configured, the serving cell represents a cell set including special cell(s) and all SCells.

Meanwhile, control information may be set to be transmitted and received only through a specific cell. For example, UCI may be transmitted only through a special cell (eg, PCell). When a SCell (hereinafter referred to as PUCCH-SCell) in which PUCCH transmission is permitted is configured, UCI may also be transmitted through the PUCCH-SCell. As another example, the base station may allocate a scheduling cell (set) to reduce PDCCH blinding decoding (BD) complexity at the terminal side. For PDSCH reception/PUSCH transmission, the UE may perform PDCCH detection/decoding only in the scheduling cell. In addition, the base station may transmit the PDCCH only through the scheduling cell (set). For example, a PDCCH for downlink allocation may be transmitted in cell #0 (ie, a scheduling cell), and a corresponding PDSCH may be transmitted in cell #2 (ie, a scheduled cell) (Cross-Carrier Scheduling , CCS). Scheduling cells (sets) may be configured in a UE-specific, UE-group-specific or cell-specific manner. A scheduling cell includes a special cell (eg, PCell).

For CCS, a carrier indicator field (CIF) is used. CIF can be semi-statically disabled / enabled by UE-specific (or UE group-specific) higher layer (eg, Radio Resource Control, RRC) signaling. The CIF field is an x-bit field (eg, x=3) in PDCCH (ie, DCI), and may be used to indicate a (serving) cell index of a scheduled cell.

- CIF disabled: CIF is absent in the PDCCH. PDCCH on a scheduling cell allocates PDSCH/PUSCH resources on the same cell. That is, the scheduling cell is the same as the scheduled cell.

- CIF enabled: CIF exists in the PDCCH. PDCCH on scheduling may allocate PDSCH/PUSCH resources on one cell among a plurality of cells using CIF. A scheduling cell may be the same as or different from a scheduled cell. PDSCH/PUSCH means PDSCH or PUSCH.

3 illustrates scheduling when multi-cells are merged. Referring to FIG. 3 , it is assumed that three cells are merged. When CIF is disabled, only PDCCH scheduling its own PDSCH/PUSCH can be transmitted in each cell (self-carrier scheduling, SCS). On the other hand, if CIF is enabled by UE-specific (or UE-group-specific or cell-specific) higher layer signaling and cell A is configured as a scheduling cell, in cell A, PDCCHs that schedule PDSCH/PUSCH of cell A as well as In addition, a PDCCH for scheduling a PDSCH/PUSCH of another cell (ie, a scheduled cell) may also be transmitted (cross-carrier scheduling, CCS). In this case, a PDCCH for scheduling its own cell is not transmitted in cell B/C.

Based on the above description, UL CA is a method of increasing outgoing speed by combining two or more frequencies when sending data uplink, that is, from a terminal to a base station. It can be used mainly when uploading data to a server, performing real-time broadcasting, or transmitting a video from a terminal to a server in high definition.

However, in the past, when the maximum transmission power is used in the Pcell or Pcell (Primary cell), the effectiveness of UL CA may not be properly used if the transmission power to be used in the aggregated secondary cell (Scell, secondary cell) disappears. .

Therefore, when a UE uses UL CA in a general environment, it is necessary to maintain the utility of UL CA (upload transmission speed increase) by limiting the transmit power of the Pcell to leave a power budget for use in the secondary cell. . However, since the base station signal is weakened when going from a cell centered on the base station to the outer part, not in a general environment, in this case, even if UL CA is performed by maintaining the existing operation, Pcell-oriented transmission is performed to drive the transmission power, so that the signal is properly transmitted to the base station. need to reach

Therefore, in the following, an embodiment of not only solving the existing problem but also adaptively selecting 2TX transmission and 1TX transmission using UL CA according to the environment in which the terminal is located in the cell will be described.

Referring to FIG. 4, in a method of operating a user equipment (UE) related to transmission power distribution in carrier aggregation according to an embodiment, the UE measures first signal strength and second signal strength, and the UE The first signal strength and the second signal strength are compared with the first threshold value and the second threshold value, respectively (S402). The UE may determine transmit power to be used for the Pcell based on the comparison result (S403), and the UE may perform uplink transmission using the transmit power (S404).

The first threshold may be Reference Signal Received Power (RSRP), and the first threshold may be Signal to Interference and Noise Ratio (SINR). As another example, both the first threshold and the second threshold may be RSRP or SINR.

Here, when the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE may use transmit power equal to the maximum transmit power minus a predetermined power for the Pcell. .

In addition, the UE may use the predetermined power for Scell-related transmission. When the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, it means that the received signal strength from the base station is sufficient. That is, it may mean being sufficiently close to the base station or having little interference in signal transmission and reception with the base station. Therefore, in this case, since it can be determined that the signal environment of the cell is sufficient to perform uplink carrier aggregation, the UE transmits a portion of the maximum transmit power available to the Pcell (transmit power of a size excluding the predetermined power from the maximum transmit power). is used, and the remaining transmission power (the predetermined transmission power) is used for Scell transmission.

In addition, when the signal strength is less than the first threshold value and less than the second threshold value, maximum transmission power may be used for the Pcell. This may correspond to a case far from the base station, a case of a cell boundary, or a case of severe interference. In this case, even if carrier aggregation is activated, it may be more important to properly deliver uplink transmission to the base station using all transmission power available to the Pcell than to use carrier aggregation. To this end, maximum transmit power is used for the Pcell.

Therefore, the UE may not perform Scell transmission when the maximum transmission power is used for the Pcell.

Meanwhile, the first threshold and the second threshold may be indicated by RRC signaling. The predetermined power may correspond to 3dB. The first threshold may be determined based on a cell boundary of the Pcell, and the second threshold may be determined in consideration of an interference situation.

5 illustrates a relationship between a first threshold value and a second threshold value and a cell area. However, FIG. 5 corresponds to an exemplary embodiment, and the threshold and cell area are not limited to the example of FIG. 5 .

Referring to FIG. 5 , the area based on the first threshold may be the same as or similar to a cell boundary. Also, although the second threshold is closer to the base station than the cell boundary, it may correspond to a boundary where carrier aggregation can be used in consideration of an interference situation.

The operation may be performed only when carrier aggregation is activated. However, it is not necessarily limited thereto and may be performed even when carrier aggregation is not activated. In this case, when the signal strength is greater than the first threshold value and greater than the second threshold value, the UE using transmit power of a size excluding a predetermined power from the maximum transmit power for the Pcell includes activating carrier aggregation. can do.

6 shows a flow chart according to an embodiment of the present invention. Referring to FIG. 6 , in step S601, a state check may be performed to determine whether the 5G smartphone has activated UL CA.

In step S602, if the downlink RSRP strength (Reference Signal Received Power) received by the smartphone terminal is greater than or equal to Threshold 1, it proceeds to the next conditional step.

In step S603, if the downlink SINR strength (Signal to Interference and Noise Ratio) received by the smartphone terminal is greater than or equal to Threshold 2, the signal environment of the current cell is good enough to utilize UL CA. can

In step S604, the maximum output of the main cell (Pcell) is restricted. Here, 3dB is set to ?弧寧? Since 50% margin is left, as shown in the figure, Pcell and Scell use 100mW each, so data can be sent twice as much.

In step S605, even if the signal of the cell where the smartphone is located is weak or noisy, even if UL CA is activated, using only the Pcell at maximum power is more helpful for data stability, so max power (200mW) is applied to the Pcell it will drive

In the case of the max TX power 23dBm (200mW) used here, it was used as an example because it is a value that is generally used as the maximum output of a smartphone in the industry, and there is no logic restriction.

Examples of wireless devices to which the present invention is applied

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

Referring to FIG. 7 , 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 (20)

In a method of operating a user equipment (UE) related to transmission power distribution in carrier aggregation in a wireless communication system,
The UE measures the first signal strength and the second signal strength;
The UE compares the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively;
determining, by the UE, transmit power to be used for the Pcell based on the comparison result;
The UE performs uplink transmission using the transmit power;
Including,
When the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE uses transmit power of a size obtained by subtracting a predetermined power from maximum transmit power for the Pcell. According to claim 1,
The method of claim 1, wherein the UE uses the predetermined power for transmission related to Scell. According to claim 1,
Wherein the operation is performed only when carrier aggregation is activated. According to claim 1 ,
When the first signal strength is less than the first threshold and the second signal strength is less than the second threshold, maximum transmission power is used for the Pcell. According to claim 4,
The UE does not perform Scell transmission when using the maximum transmission power for the Pcell. According to claim 1,
The first threshold is RSRP (Reference Signal Received Power), and the first threshold is SINR (Signal to Interference and Noise Ratio). According to claim 1,
The first threshold and the second threshold are indicated by RRC signaling. According to claim 1,
The first threshold value is determined based on a cell boundary of the Pcell, and the second threshold value is determined in consideration of an interference situation. According to claim 1,
Wherein the predetermined power corresponds to 3 dB. 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 above operations may include measuring a first signal strength and a second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively;
based on the comparison result, determining transmit power to be used for the Pcell; Including performing uplink transmission using the transmit power,
When the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE uses transmit power of a size obtained by subtracting a predetermined power from maximum transmit power for the Pcell. According to claim 10,
The UE uses the predetermined power for transmission related to Scell. According to claim 10,
The operation is performed only when carrier aggregation is activated, the UE. According to claim 10,
When the first signal strength is less than the first threshold and the second signal strength is less than the second threshold, the UE uses the maximum transmission power for the Pcell. According to claim 13,
The UE does not perform Scell transmission when the maximum transmission power is used for the Pcell. According to claim 10,
The first threshold is Reference Signal Received Power (RSRP), and the first threshold is Signal to Interference and Noise Ratio (SINR). According to claim 10,
The first threshold and the second threshold are indicated by RRC signaling, UE. According to claim 10,
The first threshold is determined based on a cell boundary of the Pcell, and the second threshold is determined in consideration of an interference situation. According to claim 10,
The predetermined power corresponds to 3 dB. In a wireless communication system, in a processor for performing operations for User Equipment (UE),
The above operations may include measuring a first signal strength and a second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively;
based on the comparison result, determining transmit power to be used for the Pcell; Including performing uplink transmission using the transmit power,
When the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE uses transmit power equal to a maximum transmit power minus a predetermined power for the Pcell. 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 above operations may include measuring a first signal strength and a second signal strength; comparing the first signal strength and the second signal strength with a first threshold value and a second threshold value, respectively;
based on the comparison result, determining transmit power to be used for the Pcell; Including performing uplink transmission using the transmit power,
When the first signal strength is greater than the first threshold and the second signal strength is greater than the second threshold, the UE uses transmission power of a size obtained by subtracting a predetermined power from maximum transmission power for the Pcell. .

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