CN112740787B - User equipment and method for wireless communication thereof - Google Patents

Abstract

Provided are user equipment and a method for wireless communication thereof. The method includes, for a first sidelink (SL) vehicle-to-external (V2X) transmission on a first radio access technology (RAT), allocating and reserving a transmit power reservation level to guarantee a maximum A minimum level of X% of the output power, and for each second SL V2X transmission on the second RAT, allocate a transmit power level up to a maximum level of (100-X)% of the user equipment's total configured maximum output power , where X is greater than 0 and less than 100.

Description

User equipment and method for wireless communication thereof

technical field

The present disclosure relates to the field of communication systems, and in particular to user equipment and its wireless communication method.

Background technique

As part of the evaluation of direct vehicle-to-everything (V2X) communication being developed by the 3rd Generation Partnership Project (3GPP), the next generation based on the recently developed fifth-generation-new radio (5G-NR) system The first-generation V2X technology (ie, NR-V2X), compared with the existing technology based on long-term evolution V2X (LTE-V2X), needs to support additional advanced intelligent transportation system (ITS) applications and services. As such, new V2X user equipment (UE) is required to be able to operate on both LTE-V2X and NR-V2X radio access technologies (RATs) simultaneously.

Because there is a requirement that the UE's total available transmit (Tx) power be limited by the UE's configured maximum output power level (P _CMAX ), at any given point in time, regardless of the sidelink (SL) Regardless of the number of channels, signals, frequency carriers and RATs, UEs should not transmit at a combined power level exceeding this limit, so when SL transmissions of LTE-V2X and NR-V2X overlap in time, new V2X UEs will Its total available Tx power needs to be shared between LTE-V2X and NR-V2X.

Contents of the invention

The purpose of the present disclosure is to propose a user equipment and a method of wireless communication thereof, which can provide the following aspects: Vehicle-to-the-world (V2X) over a higher-priority radio access technology (RAT) Transmissions (eg, Long Term Evolution V2X (LTE-V2X) or New Radio V2X (NR-V2X)) are protected and/or additional transmission (Tx) power may be allocated to higher priority RATs when available.

In a first aspect of the present disclosure, a user equipment for wireless communication includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to allocate and reserve a transmit power reservation level to guarantee a total Minimum level of X% of configured maximum output power. The processor is configured to allocate a transmit power level for the second SLV2X transmission on the second RAT up to a maximum level of (100-X)% of a total configured maximum output power of the user equipment. X is greater than 0 and less than 100.

According to an embodiment incorporating the first aspect of the present disclosure, the transmission power reservation level for the first SL V2X transmission is predetermined, preconfigured, or configured by the network base station.

According to an embodiment incorporating the first aspect of the present disclosure, during the first non-overlapping time period of the first SL V2X transmission on the first RAT, the transmission power of the user equipment is X% of the total configured maximum output power of the user equipment .

According to an embodiment incorporating the first aspect of the present disclosure, the combined transmission power of the user equipment 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, during the second non-overlapping time period of the second SL V2X transmission on the second RAT, the transmission power of the user equipment is (100) of the total configured maximum output power of the user equipment -X)%.

According to embodiments in conjunction with the first aspect of the present disclosure, there is coordination of V2X operation on the first RAT and the second RAT, or regarding SL scheduling, transmission timing and/or transmission in one of the first RAT and the second RAT The information of power allocation or usage is known by the other of the first RAT and the second RAT.

According to an embodiment incorporating the first aspect of the present disclosure, when the transmission power of the user equipment during the second SL V2X transmission on the second RAT is less than (100-X)% of the total configured maximum output power of the user equipment, the processing The transmitter is configured to allocate more than X% of the user equipment's transmission power greater than X% of the user equipment's total configured maximum output power during the first SL V2X transmission on the first RAT.

According to an embodiment incorporating the first aspect of the present disclosure, the combined transmission power of the user equipment is Equal to 100% of the total configured maximum output power of the user equipment.

According to embodiments incorporating the first aspect of the present disclosure, there is no coordination of V2X operation on the first RAT and the second RAT, or regarding SL scheduling, transmission timing and/or Information on transmission power allocation or usage is not shared with the other of the first RAT and the second RAT.

According to an embodiment in combination with the first aspect of the present disclosure, the processor is configured to select to increase the transmission power of the user equipment on the first RAT to exceed the transmission power reservation level.

According to an embodiment in combination with the first aspect of the present disclosure, during the overlapping time period when the first SL V2X transmission is performed on the first RAT and the second SL V2X transmission is performed on the second RAT simultaneously, if the combined transmission power of the user equipment greater than 100% of the total configured maximum output power of the user equipment, the processor reduces at least one of the transmission power of the user equipment on the first RAT and the second RAT, so that the combined transmission power of the user equipment is adjusted to Less than or 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 processor reduces the transmission power of the user equipment on one of the first RAT and the second RAT, the priority of which is lower than that of the first RAT and the second RAT The priority of another RAT in .

According to an embodiment incorporating the first aspect of the present disclosure, the processor equally reduces transmission power of the user equipment on the first RAT and the second RAT.

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

According to an embodiment in combination with the first aspect of the present 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 New Radio V2X (NR-V2X). V2X).

In a second aspect of the present disclosure, a method for wireless communication of a user equipment includes: for a first sidelink (SL) vehicle-to-external (V2X) transmission allocation and The transmit power reserve level is reserved to guarantee a minimum level of X% of the user equipment's total configured maximum output power. The method includes allocating, for a second SL V2X transmission on a second RAT, a transmission power level up to a maximum level of (100-X)% of a total configured maximum output power of the user equipment. X is greater than 0 and less than 100.

According to an embodiment in conjunction with the second aspect of the present disclosure, the transmission power reservation level for the first SL V2X transmission is predefined, preconfigured, or configured by the network base station.

According to an embodiment in conjunction with the second aspect of the present disclosure, during the first non-overlapping time period of the first SL V2X transmission on the first RAT, the transmission power of the user equipment is X% of the total configured maximum output power of the user equipment .

According to an embodiment incorporating the second aspect of the present disclosure, the combined transmission power of the user equipment 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, during the second non-overlapping time period of the second SL V2X transmission on the second RAT, the transmission power of the user equipment is (100) of the total configured maximum output power of the user equipment -X)%.

According to an embodiment in conjunction with the second aspect of the present disclosure, there is coordination of V2X operation on the first RAT and the second RAT, or with respect to SL scheduling, transmission timing and/or transmission in one of the first RAT and the second RAT The information of power allocation or usage is known by the other of the first RAT and the second RAT.

According to an embodiment incorporating the second aspect of the present disclosure, when the transmission power of the user equipment during the second SL V2X transmission on the second RAT is less than (100-X)% of the total configured maximum output power of the user equipment, the The method also includes allocating, during the first SL V2X transmission on the first RAT, a transmission power of the user equipment greater than X% of a total configured maximum output power of the user equipment.

According to an embodiment incorporating the second aspect of the present disclosure, the combined transmission power of the user equipment is Equal to 100% of the total configured maximum output power of the user equipment.

According to embodiments in conjunction with the second aspect of the present disclosure, there is no coordination of V2X operation on the first RAT and the second RAT, or regarding SL scheduling, transmission timing and/or Information on transmission power allocation or usage is not shared with the other of the first RAT and the second RAT.

According to an embodiment incorporating the second aspect of the present disclosure, the method further includes: selecting to increase the transmission power of the user equipment on the first RAT to exceed the transmission power reservation level.

According to an embodiment in conjunction with the second aspect of the present disclosure, during the overlapping period of simultaneous first SL V2X transmission on the first RAT and second SL V2X transmission on the second RAT, if the combined transmission of the user equipment If the power is greater than 100% of the total configured maximum output power of the user equipment, the method further includes: reducing at least one of the transmission power of the user equipment on the first RAT and the second RAT, so that the combined transmission of the user equipment The power is adjusted to be less than or equal to 100% of the total configured maximum output power of the user equipment.

According to an embodiment in combination with the second aspect of the present disclosure, the method further includes: reducing the transmission power of the user equipment on one RAT of the first RAT and the second RAT, and the priority of the one RAT is lower than that of the first RAT and the second RAT. The priority of another RAT in the second RAT.

According to an embodiment incorporating the second aspect of the present disclosure, the method further includes: reducing transmission power of the user equipment on the first RAT and the second RAT equally.

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

According to an embodiment in combination with the second aspect of the present 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 New Radio V2X (NR-V2X). V2X).

In a third aspect of the present disclosure, a non-transitory machine-readable storage medium stores instructions thereon, and when executed by a computer, the instructions cause the computer to perform the above method.

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

In an embodiment of the present disclosure, user equipment and its method of wireless communication aim to ensure that a minimum guaranteed power is available for transmission of sidelink (SL) channels and/or signals on one of the two RATs, and if there is no overlapping transmission Or there is remaining power not used by another RAT, then more transmission (Tx) power can be allocated at the same time. To achieve this, it is proposed to reserve a minimum Tx power for one of the RATs (eg LTE-V2X or NR-V2X). Embodiments of the present disclosure have at least one of the following benefits.

1. Ensure that SL transmissions on high-priority RATs (LTE-V2X or NR-V2X) are protected and have a sufficient amount of power allocated for basic V2X transmissions.

2. Ensure that more Tx power can be allocated for SL transmissions on high priority RATs (LTE-V2X or NR-V2X) when there are no overlapping transmissions or there is unused power left over by lower priority RATs.

Description of drawings

In order to more clearly explain embodiments of the present disclosure or related technologies, the following drawings that will be described in the embodiments are briefly introduced. Apparently, the drawings are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without payment.

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 method of wireless communication of a user equipment according to an embodiment of the present disclosure.

3 is an example of a user equipment (UE) power sharing scheme based on allocating guaranteed reserved power for sidelink (SL) transmissions in high priority radio access technologies (RATs) according to an embodiment of the present disclosure Schematic diagram of a sex diagram.

4 is a schematic diagram of an exemplary illustration of coordinated power sharing between _{PRAT_1} and _{PRAT_2} with static or quasi-static allocation of reserved transmission (Tx) power according to an embodiment of the disclosure.

5 is a schematic diagram of an exemplary illustration of uncoordinated power sharing between _{PRAT_1} and _{PRAT_2} with opportunistic power boosting and power adjustment, according to an embodiment of the disclosure.

6 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.

Detailed ways

The technical content, structural features, purpose and effects of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Specifically, terms in the embodiments of the present invention are only used to describe specific embodiments, and are not used to limit the present invention.

FIG. 1 shows that in some embodiments, 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 proposed functions, programs and/or methods described in this specification. Layers of the 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 run 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 chipsets, logic circuits and/or data processing devices. Memory 12 may include read only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. Transceiver 13 may include baseband circuitry for processing radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (eg, procedures, functions, etc.) that perform the functions described herein. These modules can be stored in the memory 12 and executed by the processor 11 . The memory 12 may be implemented within the processor 11, or may be implemented outside the processor 11. In this case, the memory may be communicatively coupled to the processor 11 through various means known in the art.

According to the sidelink technology developed under the 3rd Generation Partnership Project (3GPP) New Radio (NR) Release 16 and above, the communication between UEs involves vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P) and vehicle-to-infrastructure/network (V2I/N) vehicle-to-the-world (V2X) communications. UEs communicate directly with each other through a sidelink interface such as the PC5 interface.

In some embodiments, the processor 11 is configured to allocate and reserve a transmit power reservation level for a first sidelink (SL) vehicle-to-external (V2X) transmission on a first radio access technology (RAT), At a guaranteed minimum level of X% of the total configured maximum output power of the user equipment 10 . The processor 11 is configured to allocate a transmission power level for the second SL V2X transmission on the second RAT up to a maximum level of (100−X)% of a total configured maximum output power of the user equipment 10 . X is greater than 0 and less than 100.

Fig. 2 shows a method 400 of wireless communication of a UE 10 according to an embodiment of the present disclosure.

Method 400 includes, at block 402, allocating and reserving a transmit power reserve level for a first sidelink (SL) vehicle-to-external (V2X) transmission on a first radio access technology (RAT) to ensure A minimum level of X% of the total configured maximum output power of user equipment 10, at block 404, for the second SL V2X transmission on the second RAT, allocating up to (100) of the total configured maximum output power of user equipment 10 - X) % of the maximum level of transmission power level, where X is greater than 0 and less than 100.

In an embodiment of the present disclosure, a method 400 of UE 10 and its vehicle-to-external (V2X) communication provides: vehicle-to-external (V2X) transmission on a higher priority radio access technology (RAT) (e.g., Long Term Evolution V2X (LTE-V2X) or New Radio V2X (NR-V2X)) are protected and/or additional transmit (Tx) power can be allocated to higher priority RATs when available.

In some embodiments, the proposed transmission (Tx) power reservation scheme is used for UE 10 to perform V2X operation simultaneously on two different radio access technologies (RATs) (i.e., LTE-V2X and NR-V2X), by Multiple carriers transmit sidelink (SL) channels and/or signals to one or more receiving UEs (Rx-UEs) configured to receive signals, the total configured maximum output power (P _CMAX ) of the UEs is based on the RAT One of the guaranteed reserved power allocations is statically or quasi-statically shared between LTE-V2X and NR-V2X operation. When the UE 10 is configured, pre-configured or programmed by the network with a predetermined reserved transmission (Tx) power level (e.g., 60% of _PCMAX ) for one radio access technology (e.g., RAT_1 in FIG. 3 ), The reservation level is the minimum guaranteed UE Tx power allocation for all SL transmissions for that RAT at any time, regardless of whether the SL transmissions overlap in time with another RAT (eg, RAT_2 in FIG. 3 ). That is, RAT_1 is guaranteed to be able to use up to X% of the reserved _PCMAX as long as needed. Meanwhile, a UE 10 such as a transmitting UE configured to transmit a signal (Tx-UE) is allowed to allocate less Tx power for RAT_1 if the SL transmission needs less than X%. However, in this case, even though the Tx-UE has allocated less than X% of _PCMAX for SL transmissions in RAT_1, the Tx-UE is only allocated up to (100–X)% of P _CMAX . For example, assuming that an SL transmission in RAT_1 requires only 30% of the UE's total configured maximum output power, and another SL transmission in RAT_2 that overlaps in time with RAT_1's SL transmission requires 40%, then the overlap between the two SL transmissions The total combined Tx power during the part will be only 70% of _PCMAX .

Referring to FIG. 3 , the principle of Tx power sharing for two RATs (ie, RAT_1 and RAT_2 ) is exemplarily shown with a guaranteed-based reserved power allocation scheme 100 . For all SL transmissions on RAT_1, a network-configured, pre-configured or predetermined reserved Tx power of X% of the UE's total configured output power has been allocated to Tx-UEs, and SL transmissions 101 on RAT_1 are identical to RAT_2 The SL transmission 102 overlaps. Since X% of _PCMAX has been allocated and reserved for SL transmission 101 on RAT_1, SL transmission 102 on RAT_2 can only get at most (100-X)% of _PCMAX . Therefore, during the first non-overlapping time period 103, the Tx-UE may allocate at least X% 106 of _PCMAX for SL transmission 101 on RAT_1. During the overlapping time period 104 of the SL transmissions 101 and 102 simultaneously on RAT_1 and RAT_2, the combined UE Tx power 107 will be (X+(100-X))%=100%. For the second non-overlapping time period 105 of the rest of the SL transmission on RAT_2, the UE Tx power will be only (100-X)% 108 of _PCMAX .

For the case when V2X operation in a RAT is able to coordinate or take into account information about Tx scheduling, synchronization timing and/or Tx power allocation for V2X operation in another RAT, the Tx-UE can be More Tx power is allocated for SL transmission on RAT with configured reserved power. However, the Tx-UE is not allowed to allocate more than (100−X)% of the Tx output power for SL transmission on a RAT without a predetermined or (pre)configured reserved power. This is to ensure that the minimum guaranteed amount of UE Tx power can always be provided to the RAT assigned the reserved power. For example, if the Tx-UE knows in advance that it will not overlap in time with any SL transmission on another RAT, the Tx-UE can send SL data to the SL on the RAT that has been allocated 60% of _PCMAX (i.e., reserved power) Transfer allocations are additionally up to 40% of _PCMAX . However, the Tx-UE can only allocate up to 40% of _PCMAX for SL transmission on RATs without a predetermined or (pre)configured power reserve, even if there is _no power) for overlapping transmissions of RATs.

Referring to FIG. 4 , it exemplarily shows the coordinated power between the UE transmission power for RAT_1 (P _RAT-1 ) and the UE transmission power for RAT_2 (P _RAT-2 ) in the reserved power allocation scheme 200 Shared, where a reserved power level 201 of 60% of _PCMAX is predetermined or (pre)configured for SL transmission on RAT_1. If Tx-UE is able to coordinate SL transmission timing and Tx power allocation on both RAT_1 and RAT_2, then for simultaneous overlapping RAT_1 SL transmission and RAT_2 SL transmission, when SL transmission on RAT_2 only needs _PCMAX of PRAT _-2 When 30% 203, the Tx-UE can allocate 10% more power of _PCMAX in addition to 60% of _PCMAX (that is, the reserved power 204 for PRAT _-1 ), that is, the total power of 70% of _PCMAX Combined Level 206. A maximum level 202 of 40% of _PCMAX for PRAT _-2 is shown in FIG. 4 .

For cases when V2X operation in a RAT cannot coordinate or is not aware of scheduling information, Tx timing and/or Tx power allocation for V2X operation in another RAT, the Tx-UE can always be reserved according to a predetermined or (pre)configured level and allocate its Tx power within this predetermined or (pre)configured reservation level, or opportunistically boost and/or allocate more Tx power than the predetermined or (pre)configured reservation level. If the Tx power on one RAT is boosted due to opportunism, and the combined Tx power of overlapping SL transmissions on both RAT_1 and RAT_2 at any given point in time is greater than 100% of _PCMAX , then the final Tx power of RAT_1 and RAT_2 Power (eg, PRAT _-1 and PRAT _-2 ) can be adjusted based on fixed RAT priority or an equivalent reduction method.

Referring to FIG. 5 , non-coordinated allocation and final Tx power adjustment of UE Tx power (PRAT _-1 ) of RAT_1 and UE Tx power of RAT_2 (PRAT _-2 ) and final Tx power adjustment are exemplarily shown in a scheme 300, wherein Power boosting is performed by the RAT of a predetermined or (pre)configured reservation level, where a reserved power level 301 of 60% of _PCMAX is predetermined or (pre)configured for SL transmission on RAT_1. Due to the predetermined or (pre)configured reserved power for RAT_1, the maximum Tx power that can be allocated for PRAT _-2 is 40% of _PCMAX . For the example shown in scheme 300, since there is no coordination of UE Tx power between RAT_1 and RAT_2, and no information about Tx scheduling, Tx timing and/or Tx power allocation between RATs is known, Tx- The UE may choose to increase (eg opportunistic boost) the Tx power on a RAT with a predetermined or (pre)configured reservation level (ie RAT_1 ). In this case, in addition to the reservation level 301 of 60% of _PCMAX , the amount of opportunistic boost is 20% 304 of _PCMAX . Therefore, the total initial power 302 allocated to SL transmissions on RAT_1 is 80% of _PCMAX . Assume that there is an overlapping SL transmission on RAT_2, and the Tx-UE allocates 303 an initial power of 30% of _PCMAX for this transmission. Thus, due to the uncoordinated nature of the Tx power allocation between the two RATs, the initial combined Tx power is 110% of _PCMAX , which exceeds the upper limit required by the UE. In this case, UE Tx power needs to be further adjusted.

In the first adjustment scheme 310, it is a method based on fixed RAT priority, wherein RAT_1 has a higher priority. Therefore, PRAT _-1 remains the same as the previous 80% of _PCMAX 311 and PRAT _-2 is adjusted and reduced to 20% of _PCMAX 312 so that the total combined Tx power does not exceed 100% of _PCMAX .

In the second adjustment scheme 320, it is also a method based on fixed RAT priority, wherein RAT_2 has a higher priority. Therefore, PRAT _-2 remains the same as the previous 30% of _PCMAX 322 and PRAT _-1 is adjusted and reduced to 70% of _PCMAX 321 so that the total combined Tx power does not exceed 100% of _PCMAX .

In the third adjustment scheme 330 , which is based on an equal reduction method, wherein _PRAT-1 and _PRAT-2 are equally reduced by the same amount such that the total combined Tx power does not exceed 100% of _PCMAX . In the example shown in scheme 330, PRAT _-1 is reduced 331 from 80% to 75% of _PCMAX and _PRAT-2 is reduced 332 from 30% to 25% of _PCMAX .

6 is a block diagram of an example system 700 for wireless communication, according to an embodiment of the disclosure. The embodiments described herein may be implemented into a system using any suitably configured hardware and/or software. 6 shows a system 700 comprising radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory/storage 740, display 750, camera 760, sensor 770 coupled to each other at least as shown. and input/output (I/O) interface 780 .

Application circuitry 730 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. Processors may include any combination of general and special purpose processors such as graphics processors and application processors. The processor may be coupled to the memory/storage and configured to execute instructions stored in the memory/storage to enable various application programs 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. Processors may include baseband processors. The baseband circuitry may handle various wireless control functions that enable communication with one or more wireless networks via the RF circuitry. Wireless control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, and the like. In some embodiments, baseband circuitry may provide communications compatible with one or more wireless technologies. For example, in some embodiments, the baseband circuitry may support communication with the Evolved Universal Terrestrial Radio Access Network (EUTRAN) and/or other Wireless Metropolitan Area Networks (WMAN), Wireless Local Area Networks (WLAN), Wireless Personal Area Networks (WPAN) . Embodiments in which baseband circuitry is configured to support wireless communication of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

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

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

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

In various embodiments, the transmitter circuit, control circuit or receiver circuit discussed above with respect to the user equipment, eNB or gNB may be fully or partially implemented in one or more of the RF circuit, baseband circuit and/or application circuit. As used herein, "circuitry" may refer to, may be part of, or may include an Application Specific Integrated Circuit (ASIC), an electronic circuit that executes one or more software or firmware programs , processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group), combined logic, and/or other suitable hardware components that provide the described functionality. In some embodiments, electronic device circuitry may be implemented by one or more software or firmware modules, or functionality associated with the circuitry may be implemented by one or more software or firmware modules.

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

Memory/storage 740 may be used to load and store data and/or instructions, for example, for the system. The memory/storage of an embodiment may include any combination of suitable volatile memory (eg, dynamic random access memory (DRAM)) and/or non-volatile memory (eg, 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 peripheral component interfaces designed to enable Peripheral components are able to interact with the system. A user interface may include, but is not limited to, a physical keyboard or keypad, touch pad, speaker, microphone, and the like. Peripheral component interfaces may include, but are not limited to, non-volatile memory ports, universal serial bus (USB) ports, audio jacks, and power interfaces.

In various embodiments, sensors 770 may include one or more sensing devices for determining environmental conditions and/or location information related to the system. In some embodiments, sensors may include, but are not limited to, gyroscope sensors, accelerometers, proximity sensors, ambient light sensors, and positioning units. The positioning unit may also be part of or interact with baseband circuitry and/or RF circuitry to communicate with components of the positioning network (eg, 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, system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, tablet computing device, netbook, ultrabook, smartphone, or the like. In various embodiments, the system may have more or fewer components and/or a different architecture. Where appropriate, the methods described herein can be implemented as computer programs. The computer program can be stored on a storage medium such as a non-transitory storage medium.

In an embodiment of the present disclosure, a user equipment and a method of wireless communication thereof aim to ensure that a minimum guaranteed power is available for transmitting sidelink (SL) channels and/or signals on one of the two RATs, and at the same time, if there is no More transmission (Tx) power can be allocated if there are overlapping transmissions or there is remaining power not used by another RAT. To achieve this, it is proposed to reserve a minimum Tx power for one of the RATs (eg LTE-V2X or NR-V2X). Embodiments of the present disclosure are combinations of techniques/processes that can be employed in 3GPP specifications to create the final product. Embodiments of the present disclosure have at least one of the following benefits.

1. Ensure that SL transmissions (LTE-V2X or NR-V2X) on high-priority RATs are protected and have a sufficient amount of power allocated to basic V2X transmissions.

2. Ensure that more Tx power is allocated to SL transmissions (LTE-V2X or NR-V2X) on high-priority RATs when there are no overlapping transmissions or there is unused power left over by lower-priority RATs.

Those skilled in the art can understand that each unit, algorithm and step described and disclosed in the embodiments of the present disclosure is implemented using electronic hardware or a combination of computer software and electronic hardware. Whether these functions are run in hardware or software depends on the application conditions and design requirements of the technical solution.

Those skilled in the art may use different ways to implement the functions of each specific application, and such implementation should not exceed the scope of the present disclosure. Those of ordinary skill in the art should understand that since the working processes of the above systems, devices and units are basically the same, they can refer to the working processes of the systems, devices and units in the above embodiments. For ease of description and brevity, these working procedures 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 illustrative only. The division of cells is based solely on logical functionality, and other divisions exist in implementations. It is possible for multiple units or components to be combined or integrated into another system. It is also possible to omit or skip some features. On the other hand, the shown or discussed mutual couplings, direct couplings or communicative couplings operate through some interface, device or unit, whether indirectly or through electrical, mechanical or other forms of communication.

Units described as separate components may or may not be physically separate. The unit used for the display may or may not be a physical unit, ie located at one place, or distributed over several network units. Some or all of the units are used according to the purpose of the embodiment. In addition, each functional unit in each embodiment can be integrated in one processing unit, or physically independent, or two or more units can be integrated in one processing unit.

If the software functional unit is implemented and sold and used as a product, it can be stored in a readable storage medium in a computer. Based on such an understanding, the technical solutions proposed in this disclosure may be essentially or partially implemented in the form of software products. Alternatively, a part of the technical solutions that are beneficial to conventional technologies can be implemented in the form of software products. The software product in the computer is stored in a storage medium, and includes a plurality of commands for a computing device (such as a personal computer, server or network device) to execute all or part of the steps disclosed in the 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 media capable of storing program codes.

Although the present disclosure has been described in connection with what is considered to be the most practical and preferred embodiment, it is to be understood that the present disclosure is not limited to the disclosed embodiment, but is intended to be covered in the broadest interpretation without departing from the appended claims Various arrangements made under the circumstances.

Claims (18)

1. A user equipment for wireless communication, comprising:

a memory;

a transceiver; and

a processor, coupled to the memory and the transceiver,

wherein the processor is configured to:

for a first side-link SL vehicle-to-outside V2X transmission on a first radio access technology RAT, allocating and reserving a transmission power reservation level to guarantee a minimum level of X% of a total configured maximum output power of the user equipment; and

for a second SL V2X transmission on a second RAT, a transmission power level up to a maximum level of (100-X)% of a total configured maximum output power of the user equipment is allocated, wherein X is greater than 0 and less than 100;

wherein, during a first non-overlapping period of a first SL V2X transmission on the first RAT, a transmission power of the user equipment is X% of a total configured maximum output power of the user equipment; during an overlapping period of time when a first SL V2X transmission is simultaneously made on the first RAT and a second SL V2X transmission is made on the second RAT, the combined transmission power of the user equipment is equal to 100% of the total configured maximum output power of the user equipment; during a second non-overlapping period of time of a second SL V2X transmission on the second RAT, the transmission power of the user equipment is (100-X)% of a total configured maximum output power of the user equipment;

in case there is coordination of V2X operation on the first RAT and the second RAT, or information about SL scheduling, transmission timing and/or transmission power allocation or usage of one of the first RAT and the second RAT is known by the other of the first RAT and the second RAT:

when the transmission power of the user equipment is less than (100-X)% of the total configured maximum output power of the user equipment during the second SL V2X transmission on the second RAT, the processor is configured to allocate the transmission power of the user equipment greater than X% of the total configured maximum output power of the user equipment during the first SL V2X transmission on the first RAT.

2. The user equipment of claim 1, wherein the transmission power reservation level for a first SL V2X transmission is predetermined, preconfigured, or configured by a network base station.

3. The user equipment of claim 1 or 2, wherein in case there is no coordination of V2X operation on a first RAT and a second RAT, or information about SL scheduling, transmission timing and/or transmission power allocation or usage of one of the first RAT and the second RAT is not shared with the other of the first RAT and the second RAT:

the processor is configured to select to increase transmission power of a user equipment on the first RAT to exceed the transmission power reservation level.

4. The user equipment of claim 3, wherein, during an overlapping period of time in which a first SL V2X transmission is simultaneously made on the first RAT and a second SL V2X transmission is made on the second RAT, if a combined transmission power of user equipment is greater than 100% of a total configured maximum output power of user equipment, the processor reduces at least one of the transmission powers of user equipment on the first RAT and the second RAT such that the combined transmission power of user equipment is adjusted to be less than or equal to 100% of the total configured maximum output power of user equipment.

5. The user equipment of claim 4, wherein the processor reduces transmission power of the user equipment on one of the first RAT and the second RAT having a priority that is less than a priority of the other of the first RAT and the second RAT.

6. The user equipment of claim 4, wherein the processor reduces transmission power of the user equipment on the first RAT and the second RAT equally.

7. The user equipment of claim 1 or 2, wherein the first RAT and the second RAT are different.

8. The user equipment of claim 1 or 2, wherein 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 air interface, V2X, NR-V2X.

9. A method of wireless communication for a user device, comprising:

for a first side-link SL vehicle-to-outside V2X transmission on a first radio access technology RAT, allocating and reserving a transmission power reservation level to guarantee a minimum level of X% of a total configured maximum output power of the user equipment; and

for a second SL V2X transmission on a second RAT, a transmission power level up to a maximum level of (100-X)% of a total configured maximum output power of the user equipment is allocated, wherein X is greater than 0 and less than 100;

wherein, during a first non-overlapping period of a first SL V2X transmission on the first RAT, a transmission power of the user equipment is X% of a total configured maximum output power of the user equipment; during an overlapping period of time when a first SL V2X transmission is simultaneously made on the first RAT and a second SL V2X transmission is made on the second RAT, the combined transmission power of the user equipment is equal to 100% of the total configured maximum output power of the user equipment; during a second non-overlapping period of time of a second SL V2X transmission on the second RAT, the transmission power of the user equipment is (100-X)% of a total configured maximum output power of the user equipment;

in case there is coordination of V2X operation on the first RAT and the second RAT, or information about SL scheduling, transmission timing and/or transmission power allocation or usage of one of the first RAT and the second RAT is known by the other of the first RAT and the second RAT:

when the transmission power of the user equipment is less than (100-X)% of the total configured maximum output power of the user equipment during the second SL V2X transmission on the second RAT, the method further comprises allocating the transmission power of the user equipment greater than X% of the total configured maximum output power of the user equipment during the first SL V2X transmission on the first RAT.

10. The method of claim 9, wherein the transmission power reservation level for a first SL V2X transmission is predetermined, preconfigured, or configured by a network base station.

11. The method of claim 9 or 10, wherein in the absence of coordination of V2X operation on a first RAT and a second RAT, or information about SL scheduling, transmission timing and/or transmission power allocation or usage of one of the first RAT and the second RAT is not shared with the other of the first RAT and the second RAT:

a transmission power of a user equipment on the first RAT is selected to be increased beyond the transmission power reservation level.

12. The method of claim 11, wherein during an overlapping period of time in which a first SL V2X transmission is simultaneously performed on the first RAT and a second SL V2X transmission is performed on the second RAT, if a combined transmission power of a user equipment is greater than 100% of a total configured maximum output power of the user equipment, the method further comprises: at least one of the transmission powers of the user equipment on the first RAT and the second RAT is reduced such that the combined transmission power of the user equipment is adjusted to be less than or equal to 100% of the total configured maximum output power of the user equipment.

13. The method of claim 12, further comprising: reducing transmission power of the user equipment on one of the first RAT and the second RAT, the one RAT having a priority that is less than a priority of the other of the first RAT and the second RAT.

14. The method of claim 12, further comprising: the transmission power of the user equipment on the first RAT and the second RAT is reduced equally.

15. The method of claim 9 or 10, wherein the first RAT and the second RAT are different.

16. The method of claim 9 or 10, wherein 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 air interface, V2X, NR-V2X.

17. 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 9 to 16.

18. A terminal apparatus comprising: a processor; and a memory configured to store a computer program, the processor being configured to execute the computer program stored in the memory to perform the method according to any one of claims 9 to 16.