Patent Description:
The UE may determine the transmission power by applying the maximum output power requirements (or requirements) (maximum output power requirements). For example, the maximum output power requirement may be a Maximum Power Reduction (MPR) value and/or an Additional-MPR (A-MPR) value.

There is a problem in that there is no A-MPR for transmission of PSSCH and PSCCH between NR V2X UEs.

A-MPR for transmission of PSSCH and PSCCH between NR V2X terminals should be proposed.

3GPP change request R4-<NUM> titled "CR on introducing Tx requirements for <NUM> V2X UE in TS38. <NUM>-<NUM> in rel-<NUM>", is to include new feature for <NUM> V2X UE RF requirements in TS38. <NUM>-<NUM> in rel-<NUM>. For the NR V2X UE at licensed band or unlicensed band, the minimum requirements for general, operating bands, transmitter and receiver are provided.

Features of certain embodiments are defined in the dependent claims. It enables efficient V2X communication by proposing A-MPR values between V2X terminals.

The present specification may have various effects.

For example, through the procedure disclosed in this specification, by applying A-MPR conforming to the FCC regulation conditions to the UE, the UE can perform V2X communication efficiently.

Effects that can be obtained through specific examples of the present specification are not limited to the effects listed above. For example, various technical effects that a person having ordinary skill in the related art can understand or derive from the present specification may exist. Accordingly, the specific effects of the present specification are not limited to those explicitly described herein, and may include various effects that can be understood or derived from the technical characteristics of the present specification.

Evolution of 3GPP LTE includes LTE-A (advanced), LTE-A Pro, and/or <NUM> NR (new radio).

Also, parentheses used in the present disclosure may mean "for example". In detail, when it is shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when shown as "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information".

In addition, one of the most expected <NUM> use cases relates a function capable of smoothly connecting embedded sensors in all fields, i.e., mMTC. It is expected that the number of potential Internet-of-things (IoT) devices will reach <NUM> hundred million up to the year of <NUM>. An industrial IoT is one of categories of performing a main role enabling a smart city, asset tracking, smart utility, agriculture, and security infrastructure through <NUM>.

Mission critical application (e.g., e-health) is one of <NUM> use scenarios. A health part contains many application programs capable of enjoying benefit of mobile communication. A communication system may support remote treatment that provides clinical treatment in a faraway place. Remote treatment may aid in reducing a barrier against distance and improve access to medical services that cannot be continuously available in a faraway rural area. Remote treatment is also used to perform important treatment and save lives in an emergency situation. The wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

AI refers to the field of studying artificial intelligence or the methodology that can create it, and machine learning refers to the field of defining various problems addressed in the field of AI and the field of methodology to solve them. Machine learning is also defined as an algorithm that increases the performance of a task through steady experience on a task.

Robot means a machine that automatically processes or operates a given task by its own ability. In particular, robots with the ability to recognize the environment and make self-determination to perform actions can be called intelligent robots. Robots can be classified as industrial, medical, home, military, etc., depending on the purpose or area of use. The robot can perform a variety of physical operations, such as moving the robot joints with actuators or motors. The movable robot also includes wheels, brakes, propellers, etc., on the drive, allowing it to drive on the ground or fly in the air.

Autonomous driving means a technology that drives on its own, and autonomous vehicles mean vehicles that drive without user's control or with minimal user's control. For example, autonomous driving may include maintaining lanes in motion, automatically adjusting speed such as adaptive cruise control, automatic driving along a set route, and automatically setting a route when a destination is set. The vehicle covers vehicles equipped with internal combustion engines, hybrid vehicles equipped with internal combustion engines and electric motors, and electric vehicles equipped with electric motors, and may include trains, motorcycles, etc., as well as cars. Autonomous vehicles can be seen as robots with autonomous driving functions.

Extended reality is collectively referred to as VR, AR, and MR. VR technology provides objects and backgrounds of real world only through computer graphic (CG) images. AR technology provides a virtual CG image on top of a real object image. MR technology is a CG technology that combines and combines virtual objects into the real world. MR technology is similar to AR technology in that they show real and virtual objects together. However, there is a difference in that in AR technology, virtual objects are used as complementary forms to real objects, while in MR technology, virtual objects and real objects are used as equal personalities.

NR supports multiples numerologies (and/or multiple subcarrier spacings (SCS)) to support various <NUM> services. For example, if SCS is <NUM>, wide area can be supported in traditional cellular bands, and if SCS is <NUM>/<NUM>, dense-urban, lower latency, and wider carrier bandwidth can be supported. If SCS is <NUM> or higher, bandwidths greater than <NUM> can be supported to overcome phase noise.

Referring to <FIG>, a first wireless device <NUM> and a second wireless device <NUM> may transmit/receive radio signals to/from an external device through a variety of RATs (e.g., LTE and NR).

In <FIG>, {the first wireless device <NUM> and the second wireless device <NUM>} may correspond to at least one of {the wireless device 100a to 100f and the BS <NUM>}, {the wireless device 100a to 100f and the wireless device 100a to 100f} and/or {the BS <NUM> and the BS <NUM>} of <FIG>.

The first wireless device <NUM> may include at least one transceiver, such as a transceiver <NUM>, at least one processing chip, such as a processing chip <NUM>, and/or one or more antennas <NUM>.

The processing chip <NUM> may include at least one processor, such a processor <NUM>, and at least one memory, such as a memory <NUM>. It is exemplarily shown in <FIG> that the memory <NUM> is included in the processing chip <NUM>. Additional and/or alternatively, the memory <NUM> may be placed outside of the processing chip <NUM>.

The processor <NUM> may control the memory <NUM> and/or the transceiver <NUM> and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor <NUM> may process information within the memory <NUM> to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver <NUM>. The processor <NUM> may receive radio signals including second information/signals through the transceiver <NUM> and then store information obtained by processing the second information/signals in the memory <NUM>.

The memory <NUM> may be operably connectable to the processor <NUM>. The memory <NUM> may store various types of information and/or instructions. The memory <NUM> may store a software code <NUM> which implements instructions that, when executed by the processor <NUM>, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. For example, the software code <NUM> may implement instructions that, when executed by the processor <NUM>, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. For example, the software code <NUM> may control the processor <NUM> to perform one or more protocols. For example, the software code <NUM> may control the processor <NUM> to perform one or more layers of the radio interface protocol.

Herein, the processor <NUM> and the memory <NUM> may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver <NUM> may be connected to the processor <NUM> and transmit and/or receive radio signals through one or more antennas <NUM>. Each of the transceiver <NUM> may include a transmitter and/or a receiver. The transceiver <NUM> may be interchangeably used with radio frequency (RF) unit(s). In the present disclosure, the first wireless device <NUM> may represent a communication modem/circuit/chip.

The second wireless device <NUM> may include at least one transceiver, such as a transceiver <NUM>, at least one processing chip, such as a processing chip <NUM>, and/or one or more antennas <NUM>.

The processor <NUM> may control the memory <NUM> and/or the transceiver <NUM> and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor <NUM> may process information within the memory <NUM> to generate third information/signals and then transmit radio signals including the third information/signals through the transceiver <NUM>. The processor <NUM> may receive radio signals including fourth information/signals through the transceiver <NUM> and then store information obtained by processing the fourth information/signals in the memory <NUM>.

Herein, the processor <NUM> and the memory <NUM> may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver <NUM> may be connected to the processor <NUM> and transmit and/or receive radio signals through one or more antennas <NUM>. Each of the transceiver <NUM> may include a transmitter and/or a receiver. The transceiver <NUM> may be interchangeably used with RF unit. In the present disclosure, the second wireless device <NUM> may represent a communication modem/circuit/chip.

As an 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 the one or more processors <NUM> and <NUM>. The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software and the firmware or software may be configured to include the modules, procedures, or functions. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be included in the one or more processors <NUM> and <NUM> or stored in the one or more memories <NUM> and <NUM> so as to be driven by the one or more processors <NUM> and <NUM>. The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and/or a set of commands.

The one or more transceivers <NUM> and <NUM> may be connected to the one or more antennas <NUM> and <NUM> and the one or more transceivers <NUM> and <NUM> may be configured to transmit and receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure, through the one or more antennas <NUM> and <NUM>. In the present disclosure, the one or more antennas <NUM> and <NUM> may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).

The one or more transceivers <NUM> and <NUM> may convert received user data, control information, radio signals/channels, etc., from RF band signals into baseband signals in order to process received user data, control information, radio signals/channels, etc., using the one or more processors <NUM> and <NUM>. The one or more transceivers <NUM> and <NUM> may convert the user data, control information, radio signals/channels, etc., processed using the one or more processors <NUM> and <NUM> from the base band signals into the RF band signals. For example, the one or more transceivers <NUM> and <NUM> can up-convert OFDM baseband signals to OFDM signals by their (analog) oscillators and/or filters under the control of the one or more processors <NUM> and <NUM> and transmit the up-converted OFDM signals at the carrier frequency. The one or more transceivers <NUM> and <NUM> may receive OFDM signals at a carrier frequency and down-convert the OFDM signals into OFDM baseband signals by their (analog) oscillators and/or filters under the control of the one or more processors <NUM> and <NUM>.

In the implementations of the present disclosure, a UE may operate as a transmitting device in uplink (UL) and as a receiving device in downlink (DL). In the implementations of the present disclosure, a BS may operate as a receiving device in UL and as a transmitting device in DL. Hereinafter, for convenience of description, it is mainly assumed that the first wireless device <NUM> acts as the UE, and the second wireless device <NUM> acts as the BS. For example, the processor(s) <NUM> connected to, mounted on or launched in the first wireless device <NUM> may be configured to perform the UE behavior according to an implementation of the present disclosure or control the transceiver(s) <NUM> to perform the UE behavior according to an implementation of the present disclosure. The processor(s) <NUM> connected to, mounted on or launched in the second wireless device <NUM> may be configured to perform the BS behavior according to an implementation of the present disclosure or control the transceiver(s) <NUM> to perform the BS behavior according to an implementation of the present disclosure.

The communication unit <NUM> may include a communication circuit <NUM> and transceiver(s) <NUM>. For example, the communication circuit <NUM> may include the one or more processors <NUM> and <NUM> of <FIG> and/or the one or more memories <NUM> and <NUM> of <FIG>. For example, the transceiver(s) <NUM> may include the one or more transceivers <NUM> and <NUM> of <FIG> and/or the one or more antennas <NUM> and <NUM> of <FIG>. The control unit <NUM> is electrically connected to the communication unit <NUM>, the memory unit <NUM>, and the additional components <NUM> and controls overall operation of each of the wireless devices <NUM> and <NUM>. For example, the control unit <NUM> may control an electric/mechanical operation of each of the wireless devices <NUM> and <NUM> based on programs/code/commands/information stored in the memory unit <NUM>.

As an example, the control unit <NUM> may be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphical processing unit, and a memory control processor. As another example, the memory unit <NUM> may be configured by a RAM, a DRAM, a ROM, a flash memory, a volatile memory, a non-volatile memory, and/or a combination thereof.

Referring to <FIG>, a UE <NUM> may correspond to the first wireless device <NUM> of <FIG> and/or the wireless device <NUM> or <NUM> of <FIG>.

The processor <NUM> may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. The processor <NUM> may be configured to control one or more other components of the UE <NUM> to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. Layers of the radio interface protocol may be implemented in the processor <NUM>. The processor <NUM> may include ASIC, other chipset, logic circuit and/or data processing device. The processor <NUM> may be an application processor. The processor <NUM> may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem (modulator and demodulator). An example of the processor <NUM> may be found in SNAPDRAGON™ series of processors made by Qualcomm®, EXYNOS™ series of processors made by Samsung®, a series of processors made by Apple®, HELIO™ series of processors made by MediaTek®, ATOM™ series of processors made by Intel® or a corresponding next generation processor.

<FIG> is a wireless communication system.

As can be seen with reference to <FIG>, a wireless communication system includes at least one base station (BS). The BS is divided into a gNodeB (or gNB) 20a and an eNodeB (or eNB) 20b. The gNB 20a supports <NUM> mobile communication. The eNB 20b supports <NUM> mobile communication, that is, long term evolution (LTE).

Each base station 20a and 20b provides a communication service for a specific geographic area (commonly referred to as a cell) (<NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>). A cell may in turn be divided into a plurality of regions (referred to as sectors).

A UE typically belongs to one cell, and the cell to which the UE belongs is called a serving cell. A base station providing a communication service to a serving cell is referred to as a serving base station (serving BS). Since the wireless communication system is a cellular system, other cells adjacent to the serving cell exist. The other cell adjacent to the serving cell is referred to as a neighbor cell. A base station that provides a communication service to a neighboring cell is referred to as a neighbor BS. The serving cell and the neighboring cell are relatively determined based on the UE.

Hereinafter, downlink means communication from the base station (<NUM>) to the UE (<NUM>), and uplink means communication from the UE (<NUM>) to the base station (<NUM>). In the downlink, the transmitter may be a part of the base station (<NUM>), and the receiver may be a part of the UE (<NUM>). In the uplink, the transmitter may be a part of the UE (<NUM>), and the receiver may be a part of the base station (<NUM>).

Meanwhile, a wireless communication system may be largely divided into a frequency division duplex (FDD) scheme and a time division duplex (TDD) scheme. According to the FDD scheme, uplink transmission and downlink transmission are performed while occupying different frequency bands. According to the TDD scheme, uplink transmission and downlink transmission are performed at different times while occupying the same frequency band. The channel response of the TDD scheme is substantially reciprocal. This means that the downlink channel response and the uplink channel response are almost the same in a given frequency domain. Accordingly, in the TDD-based wireless communication system, there is an advantage that the downlink channel response can be obtained from the uplink channel response. In the TDD scheme, since uplink transmission and downlink transmission are time-divided in the entire frequency band, downlink transmission by the base station and uplink transmission by the UE cannot be simultaneously performed. In a TDD system in which uplink transmission and downlink transmission are divided in subframe units, uplink transmission and downlink transmission are performed in different subframes.

The operating bands in NR are as follows.

The operating band of Table <NUM> below is an operating band converted from the operating band of LTE/LTE-A. This is called the FR1 band.

The table below shows the NR operating bands defined on the high frequency phase. This is called the FR2 band.

<FIG> are exemplary diagrams illustrating an exemplary architecture for a service of next-generation mobile communication.

Referring to <FIG>, the UE is connected to the LTE/LTE-A-based cell and the NR-based cell in a DC (dual connectivity) manner.

The NR-based cell is connected to a core network for the existing <NUM> mobile communication, that is, the NR-based cell is connected an Evolved Packet Core (EPC).

Referring to <FIG>, unlike <FIG>, an LTE/LTE-A-based cell is connected to a core network for <NUM> mobile communication, that is, the LTE/LTE-A-based cell is connected to a Next Generation (NG) core network.

A service method based on the architecture shown in <FIG> and <FIG> is referred to as NSA (non-standalone).

Referring to <FIG>, UE is connected only to an NR-based cell. A service method based on this architecture is called SA (standalone).

Meanwhile, in the NR, it may be considered that reception from a base station uses downlink subframe, and transmission to a base station uses uplink subframe. This method can be applied to paired and unpaired spectra. A pair of spectrum means that two carrier spectrums are included for downlink and uplink operation. For example, in a pair of spectrums, one carrier may include a downlink band and an uplink band that are paired with each other.

<FIG> illustrates structure of a radio frame used in NR.

In NR, uplink and downlink transmission consists of frames. A radio frame has a length of <NUM> and is defined as two <NUM> half-frames (Half-Frame, HF). A half-frame is defined as <NUM><NUM> subframes (Subframe, SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on SCS (Subcarrier Spacing). Each slot includes <NUM> or <NUM> OFDM(A) symbols according to CP (cyclic prefix). When CP is usually used, each slot includes <NUM> symbols. When the extended CP is used, each slot includes <NUM> symbols. Here, the symbol may include an OFDM symbol (or a CP-OFDM symbol) and an SC-FDMA symbol (or a DFT-s-OFDM symbol).

<FIG> shows an example of subframe types in NR.

The TTI (transmission time interval) shown in <FIG> may be referred to as a subframe or a slot for NR (or new RAT). The subframe (or slot) of <FIG> may be used in a TDD system of NR (or new RAT) to minimize data transmission delay. As shown in <FIG>, a subframe (or slot) includes <NUM> symbols, like the current subframe. The front symbol of the subframe (or slot) may be used for the DL control channel, and the rear symbol of the subframe (or slot) may be used for the UL control channel. The remaining symbols may be used for DL data transmission or UL data transmission. According to this subframe (or slot) structure, downlink transmission and uplink transmission may be sequentially performed in one subframe (or slot). Accordingly, downlink data may be received within a subframe (or slot), and uplink acknowledgment (ACK/NACK) may be transmitted within the subframe (or slot).

The structure of such a subframe (or slot) may be referred to as a self-contained subframe (or slot).

Specifically, the first N symbols in a slot may be used to transmit DL control channel (hereinafter, DL control region), and the last M symbols in a slot may be used to transmit UL control channel (hereinafter, UL control region). N and M are each an integer greater than or equal to <NUM>. A resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission. For example, the PDCCH may be transmitted in the DL control region and the PDSCH may be transmitted in the DL data region. The PUCCH may be transmitted in the UL control region, and the PUSCH may be transmitted in the UL data region.

When the structure of such subframe (or slot) is used, the time it takes to retransmit data in which a reception error occurs is reduced, so that the final data transmission latency can be minimized. In such a self-contained subframe (or slot) structure, a time gap, from the transmission mode to the reception mode or from the reception mode to the transmission mode, may be required in a transition process. To this, some OFDM symbols when switching from DL to UL in the subframe structure may be set as a guard period (GP).

The numerologies may be defined by a length of cycle prefix (CP) and a subcarrier spacing. One cell may provide a plurality of numerology to a UE. When an index of a numerology is represented by µ, a subcarrier spacing and a corresponding CP length may be expressed as shown in the following table.

In the case of a normal CP, when an index of a numerology is expressed by µ, the number of OLDM symbols per slot Nslotsymb, the number of slots per frame Nframe,µslot, and the number of slots per subframe Nsubframe,µslot are expressed as shown in the following table.

In the case of an extended CP, when an index of a numerology is represented by µ, the number of OLDM symbols per slot Nslotsymb, the number of slots per frame Nframe,µslot, and the number of slots per subframe Nsubframe,µslot are expressed as shown in the following table.

<FIG> and <FIG> show an example of a method of limiting the transmission power of the UE.

Referring to <FIG>, the UE <NUM> may perform transmission with limited transmission power. For example, the UE <NUM> may perform uplink transmission to the base station through reduced transmission power.

When the peak-to-average power ratio (PAPR) value of the signal transmitted from the UE <NUM> increases, in order to limit the transmission power, the UE <NUM> applies a maximum output power reduction (MPR) value to the transmission power. By doing so, it is possible to reduce the linearity of the power amplifier PA inside the transceiver of the UE <NUM>.

Referring to <FIG>, a base station (BS) may request the UE <NUM> to apply A-MPR by transmitting a network signal (NS) to the UE <NUM>. In order not to affect adjacent bands, etc., an operation related to A-MPR may be performed. Unlike the MPR described above, the operation related to the A-MPR is an operation in which the base station additionally performs power reduction by transmitting the NS to the UE <NUM> operating in a specific operating band. That is, when the UE to which MPR is applied receives the NS, the UE may additionally apply A-MPR to determine transmission power.

Table <NUM> shows the operating band in E-UTRA V2X communication.

E-UTRA V2X communication is designed to work concurrently with E-UTRA uplink/downlink in the operating band combinations listed in Table <NUM>.

E-UTRA V2X communication is also designed to operate for in-band multi-carrier operation in the operating bands defined in Table <NUM>.

<FIG> shows the UE performing V2X or sidelink communication according to an embodiment of the present disclosure.

Referring to <FIG>, the term UE in V2X or sidelink communication may mainly refer to a user's terminal. However, when network equipment such as a base station transmits and receives signals according to a communication method between UEs, the base station may also be regarded as a kind of terminal. For example, UE <NUM> may be the first apparatus <NUM>, and UE <NUM> may be the second apparatus <NUM>.

For example, UE <NUM> may select a resource unit corresponding to a specific resource from a resource pool indicating a set of a series of resources. And, UE <NUM> may transmit a sidelink signal using the resource unit. For example, UE <NUM>, which is a receiving UE, may be configured with a resource pool through which UE <NUM> can transmit a signal, and may detect a signal of UE <NUM> in the resource pool.

Here, when the UE <NUM> is within the connection range of the base station, the base station may inform the UE <NUM> of the resource pool. On the other hand, when the UE <NUM> is outside the connection range of the base station, another UE informs the UE <NUM> of the resource pool, or the UE <NUM> may use a preset resource pool.

In general, the resource pool may be composed of a plurality of resource units, and each UE may select one or a plurality of resource units to use for its own sidelink signal transmission.

Hereinafter, resource allocation in the sidelink will be described.

<FIG> illustrates a procedure for an UE to perform V2X or sidelink communication according to a transmission mode, according to an embodiment of the present disclosure.

In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for convenience of description, a transmission mode in LTE may be referred to as an LTE transmission mode, and a transmission mode in NR may be referred to as an NR resource allocation mode.

For example, (a) of <FIG> shows an UE operation related to LTE transmission mode <NUM> or LTE transmission mode <NUM>. Or, for example, (a) of <FIG> shows an UE operation related to NR resource allocation mode <NUM>. For example, LTE transmission mode <NUM> may be applied to general sidelink communication, and LTE transmission mode <NUM> may be applied to V2X communication.

For example, (b) of <FIG> shows an UE operation related to LTE transmission mode <NUM> or LTE transmission mode <NUM>. Or, for example, (b) of <FIG> shows an UE operation related to NR resource allocation mode <NUM>.

Referring to (a) of <FIG>, in LTE transmission mode <NUM>, LTE transmission mode <NUM>, or NR resource allocation mode <NUM>, the base station may schedule a resource to be used by the UE for sidelink transmission. For example, the base station may perform resource scheduling to UE <NUM> through PDCCH (more specifically, Downlink Control Information (DCI)), and UE <NUM> may perform V2X or sidelink communication with UE <NUM> according to the resource scheduling. For example, UE <NUM> transmits SCI (Sidelink Control Information) to UE <NUM> through a Physical Sidelink Control Channel (PSCCH), and then transmits data based on the SCI to UE <NUM> through a Physical Sidelink Shared Channel (PSSCH).

Referring to (b) of <FIG>, in LTE transmission mode <NUM>, LTE transmission mode <NUM> or NR resource allocation mode <NUM>, the UE may determine a sidelink transmission resource within a sidelink resource set by a base station/network or a preset sidelink resource. For example, the configured sidelink resource or the preset sidelink resource may be a resource pool. For example, the UE may autonomously select or schedule a resource for sidelink transmission. For example, the terminal may perform sidelink communication by selecting a resource by itself within a set resource pool. For example, the terminal may select a resource by itself within the selection window by performing a sensing (sensing) and resource (re)selection procedure. For example, the sensing may be performed in units of subchannels. In addition, UE <NUM>, which has selected a resource within the resource pool, transmits the SCI to UE <NUM> through the PSCCH, and may transmit data based on the SCI to UE <NUM> through the PSSCH.

This specification proposes a new additional maximum output power reduction (A-MPR) applied to the NR V2X UE.

NR V2X supports subcarrier spacing of <NUM>, <NUM>, and <NUM>, so each A-MPR performance analysis is required. Based on the measured results, we propose A-MPR performance requirements for NR V2X UE.

As defined in FCC regulation, A-SEM (additional spectrum emission mask) and A-MPR by NS_52 signal are applied. NS_52 may use the n47 band. And the n47 band has a frequency of <NUM>-<NUM>. In addition, a channel bandwidth of <NUM> may be used.

Conventionally, there was no proposal for A-MPR to be applied to PSSCH/PSCCH transmission by the NR V2X UE for NS_33 according to EU regulation. This specification proposes a new A-MPR applied to the NR V2X sidelink UE.

For reference, as an example of a wireless communication device capable of performing wireless communication hereinafter, terms such as "terminal" and "UE" may be used. For reference, the A-MPR value described in the disclosure of this specification may be an example of a maximum output power requirement. The same value as the A-MPR value described in the disclosure of this specification may also be used as the MPR value.

Hereinafter, assumptions for measuring A-MPR will be described. The assumptions described below were used to measure and determine the maximum output power requirement (e.g., A-MPR/MPR performance requirement) for UE operating in the n47 band of NR in the disclosure of this specification.

The basic A-MPR simulation assumptions are:.

QPSK/16QAM/64QAM/256QAM with modulation orders of <NUM>, <NUM>, <NUM>, and <NUM> were assumed.

Additional A-MPR simulation assumptions are as follows.

The size of -PSCCH is assumed to be 10RB*3symbol. <FIG> shows.

<FIG> shows one of assumptions for measuring A-MPR.

The horizontal axis represents the index of the symbol of the sidelink sequentially from the left as an index, and the vertical axis represents the number of RBs.

When 10RB*3symbols are allocated to the PSCCH, a portion may be allocated to the index <NUM>-<NUM> symbol position, and the PSSCH may be allocated to the remaining portion of the index <NUM>-<NUM> symbol for multiplexing.

Even if the total allocated RBs increases, the PSCCH may be allocated up to <NUM> RBs and the remaining portion may be allocated with the PSSCH to be multiplexed.

DMRS may use symbols of indexes <NUM> and <NUM>. Transmission and reception can be switched using the 13th index symbol.

The A-MPR condition may be derived with Additional SEM (A-SEM) to protect the adjacent The Industrial, Scientific, and Medical (ISM) frequency range.

The <NUM> FCC regulation conditions in the Intelligent Transportation Systems (ITS) spectrum are shown in Table <NUM>.

Table <NUM> shows A-SEM conditions in a carrier frequency of <NUM> and a channel bandwidth of <NUM>.

To comply with FCC regulation conditions, RAN4 defines A-MPR according to NS_xx. NS_xx may be by a pre-configured radio parameter, or by a cell, or by an instruction performed by a higher layer to the NR V2X UE. Based on the simulation results, we propose an acceptable A-MPR for maximum output power due to higher-order modulation and transmission bandwidth configuration (resource blocks).

Table <NUM> shows examples of NRB according to bands and SCS.

For example, with a bandwidth of <NUM> and an SCS of <NUM>, the NRB is <NUM>.

QPSK is a modulation method with a modulation order of <NUM>, 16QAM is a modulation method with a modulation order of <NUM>, 64QAM is a modulation method with a modulation order of <NUM>, and 256QAM refers to a modulation method with a modulation order of <NUM>.

The UE may be allocated a <NUM> channel bandwidth and use it for signal transmission. The channel band consists of two guard bands at the edges and as many RBs as the number of NRB in the middle. That is, the NRB refers to the number of RBs allocated for signal transmission. Therefore, NRB is the maximum number of RBs considering the channel bandwidth and SCS. The signal may be transmitted using some RBs among the allocated NRB RBs. The first RB among some RBs used is called startRB.

NRB corresponds to an integer. Each of the plurality of allocated RBs may be numbered in the order of frequency, up to the NRB.

Table <NUM> shows A-MPR applicable to a channel bandwidth of <NUM> and a carrier frequency (fc) of <NUM>.

The plurality of RBs are divided into three zones, and the A-MPR value may be determined. NRB RBs are divided into <NUM> zones (Edge RB allocations, Outer RB allocations, Inner RB allocations). RBStart,Low corresponds to max(<NUM>, floor(NRB/k1)). Here, the max(x, y) function is a function that outputs the higher of x and y. Therefore, RBStart,Low is the higher of <NUM> and floor(NRB/k1). If NRB is greater than <NUM> and k1 is <NUM>, RBStart,Low may be floor(NRB/k1). Here, the floor(x) function is a function that outputs the largest integer among integers less than or equal to x. For example, if x is <NUM>, floor(x) is <NUM>, and if x is <NUM>, floor(x) is <NUM>.

RBStart,High correspond to NRB-RBStart,Low-LCRB. Here, LCRB must be less than or equal to ceil(NRB/k1). Here, the ceil(x) function is a function that outputs the smallest integer among integers greater than or equal to x. For example, if x is <NUM>, ceil(x) is <NUM>, and if x is <NUM>, ceil(x) is <NUM>. k1 may be <NUM>. However, other values of k1 are possible (e.g., <NUM>, <NUM>,. , <NUM>, <NUM>,.

Inner RB allocation refers to an RB whose RB number is greater than or equal to RBStart, Low and less than or equal to RBStart, High. It may be called Region <NUM>.

Edge RB allocation refers to RBs allocated to an interval as much as floor(NRB*<NUM>) at both the beginning and the end. That is, RBs with an RB number equal to or less than floor(NRB*<NUM>) and RBs with an RB number greater than or equal to NRB-floor(NRB*<NUM>) are referred to as edge RB allocation. It may be called Region <NUM>.

Outer RB allocation refers to an RB that is neither inner RB allocation nor edge RB allocation among NRB RBs. It can be called Region <NUM>.

In the <NUM> band and <NUM> subcarrier spacing (SCS), the LCRB may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. , <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>.

In the <NUM> band and the <NUM> SCS, the LCRB may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>.

In the <NUM> band and the SCS of <NUM>, the LCRB may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or <NUM>.

Inner RB allocation must be greater than or equal to RBStart,Low and less than or equal to RBStart,High. Outer RB allocation refers to all RBs that are not inner RB allocation.

A-MPR shown in Table <NUM> may have an error of ±a. a is <NUM>, <NUM>, <NUM>, <NUM>,. , may be <NUM>.

Next, simulations performed to obtain A-MPR will be described.

<FIG> shows a first embodiment of the first disclosure of the present specification.

The simulation results in the case of bandwidth of <NUM> and SCS of <NUM> are shown.

The horizontal axis indicates the start RB position, and the vertical axis indicates the LCRB. A value corresponding to each start RB position and LCRB indicates an A-MPR value for the V2X UE. For example, in case of <NUM> SCS in <NUM> bandwidth, when QPSK or 16QAM modulation is used, when the start RB position is <NUM> and LCRB is 50RB allocated, the A-MPR for the V2X UE is a value between <NUM> and <NUM> is applied.

<FIG> shows a case of <NUM> bandwidth, <NUM> SCS, and QPSK/16QAM modulation.

<FIG> shows the case of bandwidth of <NUM>, SCS <NUM>, and 64QAM modulation.

<FIG> shows the case of bandwidth of <NUM>, SCS <NUM>, and 256QAM modulation.

<FIG> shows a fourth embodiment of the first disclosure of the present specification.

The simulation results in the case of channel bandwidth of <NUM> and SCS <NUM> are shown.

<FIG> shows the case of bandwidth <NUM>, SCS <NUM>, and 64QAM modulation.

<FIG> shows a seventh embodiment of the first disclosure of the present specification.

The simulation results in the case of channel bandwidth <NUM> and SCS <NUM> are shown.

<FIG> shows the case of a bandwidth of <NUM>, SCS <NUM>, and QPSK/16QAM modulation.

The following drawings were created to explain a specific example of the present specification. Since the names of specific devices described in the drawings or the names of specific signals/messages/fields are presented by way of example, the technical features of the present specification are not limited to the specific names used in the following drawings.

<FIG> shows a flowchart in accordance with the disclosure of the present specification.

The base station may broadcast an indication signal to the UE1. Based on the indication signal, the UE may acquire a network signal value <NUM> (NS_52). UE1 may select and use A-MPR pre-configured in UE1 itself based on the acquired NS_52. In this way, the UE may select the A-MPR to be used by acquiring the network signal NS_52.

UE1 may determine the transmission power of a sidelink signal (PSSCH/PSCCH) to be transmitted to another UE (UE2) based on the A-MPR information.

UE1 may transmit a sidelink signal (PSSCH/PSCCH) to another UE using the determined transmission power.

<FIG> shows a procedure of a UE according to the disclosure of the present specification.

Effects that can be obtained through specific examples of the present specification are not limited to the effects listed above. For example, various technical effects that a person having ordinary skill in the related art can understand or derive from this specification may exist. Accordingly, the specific effects of the present specification are not limited to those explicitly described herein, and may include various effects that can be understood or derived from the technical characteristics of the present specification.

Claim 1:
A user equipment, UE, (<NUM>) comprising:
a transceiver (<NUM>) to transmit a signal and to receive a signal; and
a processor (<NUM>) to control the transceiver (<NUM>),
wherein the processor (<NUM>) is configured to acquire a network signal, NS, <NUM>,
wherein the processor (<NUM>) is configured to determine additional maximum power reduction, A-MPR, based on the NS <NUM>,
wherein the processor (<NUM>) is configured to determine transmission power for a sidelink signal, based on the A-MPR,
wherein the transceiver (<NUM>) is configured to transmit the sidelink signal with the transmission power, to another UE,
wherein the sidelink signal is transmitted through Physical Sidelink Shared Channel, PSSCH, or Physical Sidelink Control Channel, PSCCH,
wherein the sidelink signal is transmitted through a band having a center frequency of <NUM> and a bandwidth of <NUM>,
wherein the sidelink signal is transmitted through allocated resource blocks, RBs, which belongs to one among region <NUM>, region <NUM> and region <NUM>,
wherein the sidelink signal is transmitted by using modulation type, which is one among quadrature phase shift keying, QPSK, 16quadrature amplitude modulation, 16QAM, 64QAM and 256QAM,
wherein the A-MPR is determined based on the allocated RBs and the modulation type,
wherein the A-MPR is <NUM> dB or less, based on the modulation type being the QPSK and the allocated RBs belonging to the region <NUM>,
wherein the region <NUM> includes i) RBs whose RB index number of RBs is floor (NRB * <NUM>) or less and ii) RBs whose number of RBs is bigger than NRB-floor (NRB * <NUM>) or more,
wherein the region <NUM> includes RBs whose number of RBs is i) greater than or equal to floor (NRB/<NUM>) and ii) less than or equal to NRB-floor (NRB/<NUM>)-LCRB,
wherein the LCRB is ceil (NRB/<NUM>) or less,
wherein the region <NUM> includes RBs that do not correspond to the region <NUM> or the region <NUM> among the NRB RBs,
wherein the floor(x) is the greatest integer less than or equal to the x,
wherein the ceil(y) is the smallest integer greater than or equal to the y.