CN112771938A

CN112771938A - User equipment and wireless communication method thereof

Info

Publication number: CN112771938A
Application number: CN201880097888.1A
Authority: CN
Inventors: 林晖闵; 赵振山; 卢前溪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2021-05-07
Anticipated expiration: 2038-11-01
Also published as: CN112771938B; WO2020087438A1

Abstract

A user equipment and a wireless communication method thereof are provided. The method comprises the following steps: receiving a ratio split of a total configured maximum output power of a user equipment for each of a first Radio Access Technology (RAT) and a second RAT; and allocating a power ratio of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT according to the ratio split of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT.

Description

User equipment and wireless communication method thereof

Technical Field

The present disclosure relates to the field of communication systems, and more particularly, to a user equipment and a wireless communication method thereof.

Background

As part of the evaluation of direct-to-evolution (V2X) communications being developed by the 3 rd generation partnership project (3GPP), the next generation V2X technology based on the recently developed 5 th generation new radio (5G-NR) system (i.e., NR-V2X) requires support for additional advanced Intelligent Transportation System (ITS) applications and services as compared to existing technology based on long term evolution V2X (LTE-V2X). This therefore requires that the new V2X User Equipment (UE) be able to operate on both Radio Access Technologies (RATs) of LTE-V2X and NR-V2X simultaneously.

Since there is a maximum output power level (P) for the total available transmit (Tx) power of the UE that is configured by the UE_CMAX) The requirement of the limit of (1), for which the UE should not transmit at a combined power level that exceeds the limit regardless of the number of Sidelink (SL) channels, signals, frequency carriers, and RATs that the UE is transmitting at any given point in time, would require a new power management scheme that allows sharing of the UE available power on two different RATs for the new V2X UE.

When V2X operations on LTE and NR side links cannot coordinate with each other and/or information about Tx scheduling, Tx timing, resource selection/reservation, and Tx power usage of one RAT is not known by the other RAT, there are significant risks as follows: if the SL channels and/or signals transmitted using two RATs overlap in time, the combined Tx power will exceed the above allowable maximum output power requirement (P)_CMAX). This will therefore force the UE Radio Frequency (RF) components to adjust/reduce the total output power before the final transmission. This unfortunately results in a degradation of the performance of the V2X operation when the expected reliability, communication range and data rate are not reached. This is particularly acute since the operation of LTE-V2X and NR-V2X is primarily directed to road safety related transmissions.

Disclosure of Invention

An object of the present disclosure is to propose a user equipment and a wireless communication method thereof, which can provide a simple and fair (clear) inter-Radio Access Technology (RAT) User Equipment (UE) transmission (Tx) power splitting and management mechanism for long term evolution vehicle networking (LTE-V2X) and new radio V2X (NR-V2X) operations, and/or without inter-RAT-Tx power coordination.

In a first aspect of the disclosure, a user equipment for wireless communication comprises: a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to: controlling a transceiver to receive a ratio split of a total configured maximum output power of a user equipment for each of a first Radio Access Technology (RAT) and a second RAT; and allocating a power ratio of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT according to the ratio split of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT.

According to an embodiment in combination with the first aspect of the disclosure, the ratio split of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT is predefined, preconfigured or configured by the network base station.

According to an embodiment in combination with the first aspect of the disclosure, the sum of the power ratios of the total configured maximum output power of the user equipment between the first RAT and the second RAT is equal to 100% of the total configured maximum output power of the user equipment.

According to an embodiment incorporating the first aspect of the present disclosure, the power ratio of the total configured maximum output power for the user equipment of the first RAT is shared by all sidelink channels and/or signal transmissions within the first RAT.

According to an embodiment incorporating the first aspect of the present disclosure, the power ratio of the total configured maximum output power for the user equipment of the second RAT is shared by all sidelink channels and/or signal transmissions within the second RAT.

According to an embodiment incorporating the first aspect of the disclosure, the first RAT and the second RAT are different.

According to an embodiment incorporating the first aspect of the disclosure, one of the first RAT and the second RAT is long term evolution V2X (LTE-V2X) and the other of the first RAT and the second RAT is a new radio V2X (NR-V2X).

According to an embodiment in combination with the first aspect of the disclosure, the power ratio of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT is a fixed power ratio.

According to an embodiment incorporating the first aspect of the disclosure, the total configured maximum output power of the user equipment is statically or quasi-statically shared between the first RAT and the second RAT.

In a second aspect of the present disclosure, a wireless communication method of a user equipment includes: receiving a ratio split of a total configured maximum output power of a user equipment for each of a first Radio Access Technology (RAT) and a second RAT; and allocating a power ratio of the total configured maximum output power for the user equipment of each of the first and second RATs according to the ratio split of the total configured maximum output power for the user equipment of each of the first and second RATs.

According to an embodiment incorporating the second aspect of the present disclosure, the ratio split of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT is predefined, preconfigured or configured by the network base station.

According to an embodiment incorporating the second aspect of the disclosure, the sum of the power ratios of the total configured maximum output power of the user equipment between the first RAT and the second RAT is equal to 100% of the total configured maximum output power of the user equipment.

According to an embodiment incorporating the second aspect of the present disclosure, the power ratio of the total configured maximum output power for the user equipment of the first RAT is shared by all sidelink channels and/or signal transmissions in the first RAT.

According to an embodiment incorporating the second aspect of the present disclosure, the power ratio of the total configured maximum output power for the user equipment of the second RAT is shared by all sidelink channels and/or signal transmissions in the second RAT.

According to an embodiment incorporating the second aspect of the disclosure, the first RAT and the second RAT are different.

According to an embodiment incorporating the second aspect of the disclosure, one of the first RAT and the second RAT is long term evolution V2X (LTE-V2X) and the other of the first RAT and the second RAT is a new radio V2X (NR-V2X).

According to an embodiment incorporating the second aspect of the present disclosure, the power ratio of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT is a fixed power ratio.

According to an embodiment incorporating the second aspect of the disclosure, the total configured maximum output power of the user equipment is statically or statically shared between the first RAT and the second RAT.

In a third aspect of the disclosure, a non-transitory machine-readable storage medium has stored thereon instructions which, when executed by a computer, cause the computer to perform the above-described method.

In a fourth aspect of the present disclosure, a terminal apparatus includes: a processor and a memory configured to store a computer program. The processor is configured to execute a computer program stored in the memory to perform the above-described method.

In embodiments of the present disclosure, the user equipment and its wireless communication method aim to ensure a fixed and unambiguous separation of the total available power of the UE for each RAT, so that the combined output power for any overlapping part of the uplink (SL) transmissions on both RATs never exceeds the upper limit (P) of the UE-configured output power_CMAX) And the final Tx power of each RAT may be properly managed by the Tx-UEs within the same RAT to avoid any unwanted power reduction affecting overall V2X performance. To achieve this, a static or quasi-static partitioning is proposed, and the amount of Tx power (in P) available per RAT is_CMAXPercent) of the total weight of the system. Embodiments of the present disclosure have at least one of the following benefits.

1. When inter-RAT-Tx-time and power coordination between the two RATs is not possible, a simple and fair mechanism to share the UE's total available Tx power between the two V2X operating RATs (such as LTE-V2X and NR-V2X) is enabled.

2. The following is avoided: two RATs within the Tx-UE over-allocate the amount of Tx power for SL transmission in each RAT, and the combined output power exceeds the upper limit of Tx power allowed for Tx-UE transmission.

3. For better intra-RAT power management, simultaneous transmission of SL channels and/or signals on different carriers or frequency resources within the same RAT is avoided when the total available power is insufficient for Frequency Division Multiplexing (FDM) type transmission.

Drawings

In order to more clearly illustrate embodiments of the present disclosure or related art, reference is briefly made to the accompanying drawings, which are to be described in detail in the examples, it being understood that the drawings are merely some of the embodiments of the disclosure and that other drawings may be derived by those skilled in the art without undue effort.

Fig. 1 is a block diagram of a user equipment for wireless communication according to an embodiment of the present disclosure.

Fig. 2 is a flowchart illustrating a wireless communication method of a user equipment according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of an exemplary illustration of fixed User Equipment (UE) power ratio partitioning between long term evolution internet of vehicles (LTE-V2X) and new radio internet of vehicles (NR-V2X) carriers, according to an embodiment of the disclosure.

Fig. 4 is a block diagram of a system for wireless communication in accordance with an embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure and technical contents, structural features, objects of realization, and effects thereof are described in detail with reference to the following drawings. In particular, the terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure.

In some embodiments, fig. 1 shows that a User Equipment (UE)10 for wireless communication may include a processor 11, a memory 12, and a transceiver 13. The processor 11 may be configured to implement the proposed functions, processes and/or methods described in this specification. A multi-layer radio interface protocol may be implemented in the processor 11. The memory 12 is operatively coupled with the processor 11 and stores various information to operate the processor 11. The transceiver 13 is operatively coupled with the processor 11 and transmits and/or receives radio signals.

Processor 11 may include an Application Specific Integrated Circuit (ASIC), other chipset, logic circuit, and/or data processing device. The memory 12 may include Read Only Memory (ROM), Random Access Memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. The transceiver 13 may include baseband circuitry that processes radio frequency signals. When the embodiments are implemented in software, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules may be stored in the memory 12 and executed by the processor 11. The memory 12 may be implemented within the processor 11 or external to the processor 11, in which case the memory may be communicatively coupled to the processor 11 via various means as is known in the art.

According to sidelink technology developed under 3 rd generation partnership project (3GPP) New Radio (NR) release 16 and beyond, communications between UEs involve vehicle-to-vehicle (V2X) communications including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure/network (V2I/N). The UEs communicate directly with each other over a sidelink interface, such as a PC5 interface.

In some embodiments, the processor 11 is configured to: controlling the transceiver 13 to receive a ratio split of a total configured maximum output power of the user equipment 10 for each of a first Radio Access Technology (RAT) and a second RAT; and allocating a power ratio of the total configured maximum output power of the user equipment 10 for each of the first and second RATs according to the ratio split of the total configured maximum output power of the user equipment 10 for each of the first and second RATs.

Fig. 2 illustrates a method 400 of wireless communication of a UE10 in accordance with an embodiment of the disclosure.

The method 400 includes: at block 402, receiving a ratio split of a total configured maximum output power of a user equipment 10 for each of a first Radio Access Technology (RAT) and a second RAT; and at block 404, allocating a power ratio of the total configured maximum output power of the user equipment 10 for each of the first RAT and the second RAT according to the ratio split of the total configured maximum output power of the user equipment 10 for each of the first RAT and the second RAT.

In embodiments of the present disclosure, the UE10 and method 400 of its vehicle networking (V2X) communication provide simple and clean inter-Radio Access Technology (RAT) User Equipment (UE) transmission (Tx) power splitting and management mechanisms for long term evolution vehicle networking (LTE-V2X) and new radio V2X (NR-V2X) operations, and/or without inter-RAT-Tx power coordination.

In some embodiments, a proposed transmission (Tx) power splitting scheme for UEs performing V2X operations on two different Radio Access Technologies (RATs) simultaneously, i.e., LTE-V2X and NR-V2X, transmits Sidelink (SL) channels and/or signals over multiple carriers to one or more receiving UEs (Rx-UEs) configured to receive signals, statically or quasi-statically shares a total configured maximum output power (P) of the Tx-UEs between LTE-V2X and NR-V2X operations based on a fixed power splitting ratio (e.g., 50/50, 60/40, 70/30, 80/20, etc.) for the two RATs_CMAX). When the user equipment 10, such as a Tx-UE configured to transmit signals, is network-configured, preconfigured or programmed to a predefined UE-configured maximum output power (P) for each RAT_CMAX) Is divided (e.g., P as shown in fig. 3)_CMAX60% for RAT _1 and P _CMAX40% for RAT _2), a fixed power ratio split is the maximum UE-Tx power allocation for all SL transmissions at any point in time and for a given RAT, regardless of whether the SL transmissions overlap or do not overlap with other RATs in time. Furthermore, in some embodiments, the sum of the UE power split ratios between the two RATs should always sum up to P_CMAXRather than more or less than P _CMAX100% of the total. And P is_CMAXThe allocated power ratio for a RAT (such as LTE-V2X or NR-V2X) is shared by all SL channels and/or signaling within the RAT.

Referring to fig. 3, a fixed power ratio split ratio of 60/40 between RAT _1 and RAT _2 (i.e., P-2) is illustrated in a UE power sharing scheme 100 between LTE-V2X and NR-V2X operations _CMAX60% for RAT _ 1105 and P _CMAX40% for RAT _ 2106). For RAT _1, two separate SL channels and/or signals are transmitted simultaneously on carrier 1101 and carrier 2102, i.e., SL transmissionPeriods 107 are overlapped between the input RAT _1 and carriers 1101 and 2102 are each allocated P_CMAXSo that the combined Tx power does not exceed the fixed power split ratio (P) for RAT _1_CMAX60% of). Similarly, within RAT _2, two separate SL channels and/or signals are also transmitted simultaneously on carrier 3103 and carrier 4104, i.e. the period 108 overlaps between RAT _2 for SL transmissions, but at a later occasion than the transmission of RAT _1, both carrier 3103 and carrier 4104 are allocated P_CMAXSo that the combined Tx power does not exceed the fixed power split ratio (P) for RAT _2_CMAX40% of). Since these transmission power allocations are strictly within a fixed power split ratio within each RAT, the total combined UE-Tx power 110 does not exceed the total UE configured maximum output power (P) during the inter-RAT overlap period 109 for SL transmissions either_CMAX100% of).

Fig. 4 is a block diagram of an example system 700 for wireless communication in accordance with an embodiment of the present disclosure. The embodiments described herein may be implemented into a system using any suitable configuration of hardware and/or software. Fig. 4 shows a system 700 that includes Radio Frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory/storage 740, display 750, camera 760, sensor 770, and input/output (I/O) interface 780, coupled to one another at least as shown.

The application circuitry 730 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of general purpose processors and dedicated processors, such as an image processor, an application processor. The processor may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the system.

Baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may comprise a baseband processor. The baseband circuitry may handle various radio control functions that enable communication with one or more radio networks through the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, and the like. In some embodiments, the baseband circuitry may provide communications compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and/or other Wireless Metropolitan Area Networks (WMANs), Wireless Local Area Networks (WLANs), wireless personal networks (WPANs). Embodiments of radio communications in which the baseband circuitry is configured to support more than one wireless protocol may be referred to as multi-mode baseband circuitry.

In various embodiments, baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered to be in baseband frequencies. For example, in some embodiments, the baseband circuitry may include circuitry that operates on signals having an intermediate frequency between the baseband frequency and the radio frequency.

The RF circuitry 710 may enable communication with a wireless network using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, and the like to facilitate communication with the wireless network.

In various embodiments, RF circuitry 710 may include circuitry that operates on signals that are not strictly considered to be at radio frequencies. For example, in some embodiments, the RF circuitry may include circuitry that operates on signals having an intermediate frequency between a baseband frequency and a radio frequency.

In various embodiments, the transmit circuitry, control circuitry, or receive circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, baseband circuitry, and/or application circuitry. As used herein, "circuitry" may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group) that executes one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality, or a combination of an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group) that executes one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality Dedicated or group), combinational logic circuits, and/or other suitable hardware components that provide the described functionality. In some embodiments, the electronics circuitry may be implemented in, or functions associated with, one or more software or firmware modules.

In some embodiments, some or all of the constituent components of the baseband circuitry, application circuitry, and/or memory/storage devices may be implemented together on a system on a chip (SOC).

Memory/storage 740 may be used to load and store data and/or instructions, for example, for a system. Memory/storage for one embodiment may include any combination of suitable volatile memory, such as Dynamic Random Access Memory (DRAM), and/or non-volatile memory, such as flash memory.

In various embodiments, I/O interface 780 may include: one or more user interfaces designed to enable a user to interact with the system; and/or a peripheral component interface designed to enable peripheral components to interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, and the like. The peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a Universal Serial Bus (USB) port, an audio jack, and a power interface.

In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyroscope sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of, or interact with, baseband circuitry and/or RF circuitry that communicates with components of a positioning network, such as Global Positioning System (GPS) satellites.

In various embodiments, display 750 may include displays such as liquid crystal displays and touch screen displays. In various embodiments, the system 700 may be a mobile computing device, such as, but not limited to, a notebook computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, and the like. In various embodiments, the system may have more or fewer components and/or different architectures. Where appropriate, the methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium such as a non-transitory storage medium.

In embodiments of the present disclosure, the user equipment and its wireless communication method aim to ensure a separation of the fixed and explicit UE total available power for each RAT, so that the combined output power for any overlapping part of the Sidelink (SL) transmissions on both RATs never exceeds the UE configured upper limit of output power (P;)_CMAX) And the final Tx power of each RAT may be properly managed by the Tx-UEs within the same RAT to avoid any unwanted power reduction affecting overall V2X performance. To achieve this, a static or quasi-static partitioning is proposed, and the amount of Tx power (in P) available per RAT is_CMAXPercent) of the total weight of the composition. Embodiments of the present disclosure are a combination of techniques/procedures that may be employed in 3GPP specifications to create an end product. Embodiments of the present disclosure have at least one of the following benefits.

1. When inter-RAT-Tx-time and power coordination among the two RATs is not possible, a simple and fair mechanism to share the UE's total available Tx power between the two V2X operating RATs (such as LTE-V2X and NR-V2X) is enabled.

2. The following is avoided: two RATs within the Tx-UE allocate an excessive amount of Tx power for SL transmissions in each RAT, and the combined output power exceeds the upper limit of Tx power that the Tx-UE is allowed to transmit.

One of ordinary skill in the art understands that each of the units, algorithms, and steps described and disclosed in the embodiments of the present disclosure is implemented using electronic hardware or a combination of software and electronic hardware for a computer. Whether these functions are run in hardware or software depends on the application conditions and design requirements for the technical project.

Those of ordinary skill in the art may implement the functionality for each particular application in different ways without departing from the scope of the present disclosure. It will be appreciated by a person skilled in the art that since the working processes of the above-described systems, devices and units are substantially the same, he/she may refer to the working processes of the systems, devices and units in the above-described embodiments. For simplicity of description and simplicity, these operations will not be described in detail.

It should be understood that the systems, devices, and methods disclosed in the embodiments of the present disclosure may be implemented in other ways. The above embodiments are merely exemplary. The partitioning of cells is based on logical functions only, while other partitions exist in the implementation. Multiple units or components may be combined or integrated in another system. Some features may also be omitted or skipped. In another aspect, the interconnections, direct couplings or communicative couplings shown or discussed are operated indirectly or communicatively through some port, device or unit, whether electrically, mechanically or otherwise.

Elements described as separate components may or may not be physically separate. The units for displaying are physical units or not, i.e. located in one place or distributed over multiple network units. Some or all of the units are used according to the purpose of the embodiment. Furthermore, each functional unit in each embodiment may be integrated in one processing unit, physically independent, or integrated in one processing unit having two or more units.

If the software functional unit is implemented and used and sold as a product, it may be stored in a readable storage medium in a computer. Based on this understanding, the technical plan presented in the present disclosure may be implemented essentially or partially in the form of a software product. Alternatively, a portion of the technical plan that would be beneficial to the conventional art may be implemented in the form of a software product. The software product in computing is stored in a storage medium comprising a plurality of instructions for a computing device, such as a personal computer, server, or network device, to execute all or some of the steps disclosed by embodiments of the present disclosure. The storage medium includes a USB disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a floppy disk, or other type of medium capable of storing program code.

While the disclosure has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the disclosure is not to be limited to the disclosed embodiment, but is intended to cover various arrangements without departing from the scope of the broadest interpretation of the appended claims.

Claims

1. A user equipment for wireless communication, comprising:

a memory;

a transceiver; and

a processor coupled with the memory and the transceiver,

wherein the processor is configured to:

control the transceiver to receive a ratio split of a total configured maximum output power of the user equipment for each of a first Radio Access Technology (RAT) and a second RAT; and

allocating a power ratio of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT according to the ratio split of the total configured maximum output power of the user equipment for each of the first RAT and the second RAT.

2. The user equipment of claim 1, wherein the ratio split of the total configured maximum output power of the user equipment for each of the first and second RATs is predefined, preconfigured or configured by a network base station.

3. The user equipment of claim 1 or 2, wherein a sum of power ratios of the total configured maximum output power of the user equipment between the first RAT and the second RAT is equal to 100% of the total configured maximum output power of the user equipment.

4. The user equipment of any of claims 1-3, wherein the power ratio for the total configured maximum output power of the user equipment of the first RAT is shared by all sidelink channels and/or signal transmissions within the first RAT.

5. The user equipment of any of claims 1-4, wherein the power ratio for the total configured maximum output power of the user equipment of the second RAT is shared by all sidelink channels and/or signal transmissions within the second RAT.

6. The user equipment of any of claims 1-5, wherein the first RAT and the second RAT are different.

7. The user equipment of any of claims 1-6, wherein one of the first and second RATs is Long term evolution V2X (LTE-V2X) and the other of the first and second RATs is new radio V2X (NR-V2X).

8. The user equipment of any of claims 1-7, wherein the power ratio of the total configured maximum output power of the user equipment for each of the first and second RATs is a fixed power ratio.

9. The user equipment of any of claims 1-8, wherein a total configured maximum output power of the user equipment is statically or quasi-statically shared between the first RAT and the second RAT.

10. A method of wireless communication of a user equipment, comprising:

receiving a ratio split of a total configured maximum output power of the user equipment for each of a first Radio Access Technology (RAT) and a second RAT; and

11. The method of claim 10, wherein the ratio split of the total configured maximum output power of the user equipment for each of the first and second RATs is predefined, preconfigured or configured by a network base station.

12. The method of claim 10 or 11, wherein a sum of power ratios of the total configured maximum output power of the user equipment between the first RAT and the second RAT is equal to 100% of the total configured maximum output power of the user equipment.

13. The method of any of claims 10 to 12, wherein the power ratio for the total configured maximum output power of the user equipment of the first RAT is shared by all sidelink channels and/or signal transmissions within the first RAT.

14. The method of any of claims 10 to 13, wherein the power ratio for the total configured maximum output power of the user equipment of the second RAT is shared by all sidelink channels and/or signal transmissions within the second RAT.

15. The method of any of claims 10 to 14, wherein the first RAT and the second RAT are different.

16. The method of any of claims 10 to 15, wherein one of the first and second RATs is long term evolution V2X (LTE-V2X) and the other of the first and second RATs is a new radio V2X (NR-V2X).

17. The method of any of claims 10 to 16, wherein the power ratio of the total configured maximum output power of the user equipment for each of the first and second RATs is a fixed power ratio.

18. The method of any of claims 10 to 17, wherein the total configured maximum output power of the user equipment is statically or quasi-statically shared between the first RAT and the second RAT.

19. A non-transitory machine-readable storage medium having instructions stored thereon, which when executed by a computer, cause the computer to perform the method of any of claims 10-18.

20. A terminal apparatus, comprising: a processor and a memory, the memory configured to store a computer program, the processor configured to execute the computer program stored in the memory to perform the method of any of claims 10 to 18.