CN112771951A

CN112771951A - User equipment and method for resource selection of user equipment

Info

Publication number: CN112771951A
Application number: CN202080005427.4A
Authority: CN
Inventors: 赵振山; 卢前溪; 林晖闵
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-05-20
Filing date: 2020-03-03
Publication date: 2021-05-07
Also published as: WO2020233189A1

Abstract

A user equipment and a method for detecting operation and resource selection of the user equipment are provided. The method comprises determining transmission resources comprising transmission resources for other purposes and excluding transmission resources comprising transmission resources for other purposes from the set of candidate resources.

Description

User equipment and method for resource selection of user equipment

Background of the disclosure

1. Field of disclosure

The present disclosure relates to the field of communication systems, and more particularly to a user equipment and a method for resource selection of the user equipment.

2. Description of the related Art

New wireless vehicle-to-anything (NR-V2X) is a device-to-device (D2D) based technology. Two transmission modes, e.g., mode 1 and mode 2, are introduced in NR-V2X. An example is shown in fig. 1, where in mode 1, Sidelink (SL) transmission resources are allocated by the network. Dynamic scheduling, e.g., based on Downlink Control Information (DCI), and/or semi-static scheduling, e.g., based on configured grants, are supported in mode 1. Mode 1 may only be applied to in-coverage (IC) User Equipments (UEs). An example is shown in fig. 2, where in mode 2 the SL transmission resource is selected by the transmitter UE. The Resource Pool (RP) may be preconfigured or configured by the network. Within the resource pool, the transmitter UE may autonomously select transmission resources for SL transmission. Mode 2 may be applied to both in-coverage and out-of-coverage (OOC) UEs.

There are two ways for the UE to perform resource selection, e.g., random operation and detection operation. In random operation, within the RP, the UE randomly selects transmission resources. For example, the UE may select resources within the RP with equal probability. In the detection operation, the UE selects transmission resources for SL transmission within a resource selection window based on the detection result. If a packet is available or a resource (re) selection procedure is triggered at slot n, the UE will select transmission resources from a resource selection window n + T1, n + T2, where T1 is determined by the UE capabilities, e.g., processing delay. T2 is determined by the packet delay budget. First, the UE assumes all transmission resources within the resource selection window as candidate transmission resources. Then, if the transmission resource will collide with other UEs or if it has no detection result on the transmission resource, the UE will exclude some transmission resources within the resource selection window.

In long term evolution V2X (LTE-V2X), the RP configuration includes only contiguous Physical Resource Blocks (PRBs) in the frequency domain. In this case, a physical side uplink shared channel (PSSCH) may be mapped only to consecutive PRBs if consecutive subchannels are used. Fig. 3 shows an RP configuration. Whereas in NR-V2X, the RP configuration may include non-contiguous PRBs in the frequency domain. In one example, there is a PSSCH RP in FIG. 3 that includes 4 subchannels, e.g., subchannel 0, subchannel 1, subchannel 2, and subchannel 3. Each subchannel includes 4 PRBs. One of the PRBs in subchannel 2 is reserved or used for other purposes. In this case, the psch may be mapped to a continuous PRB or a discontinuous PRB. For example, if the psch is mapped only to subchannel 0 and subchannel 1 that are consecutive in the frequency domain. If the PSSCH is mapped to sub-channel 2 and sub-channel 3, since the PSSCH cannot occupy resources for other purposes, the PSSCH can be mapped to only 3 PRBs in sub-channel 2 and 4 PRBs in sub-channel 3. This will result in a non-contiguous PRB mapping of the pschs. The PSSCH mapped to non-contiguous PRBs will result in a large peak-to-average power ratio (PAPR), Cubic Metric (CM), and/or Maximum Power Reduction (MPR).

Therefore, there is a need to propose a user equipment and a method for resource selection thereof that can solve the problems of the prior art, such as improving a large peak-to-average power ratio (PAPR), a cubic metric (centimeter), and/or a Maximum Power Reduction (MPR), reducing power consumption, and/or improving reliability.

SUMMARY

An object of the present disclosure is to provide a user equipment and a method for resource selection of the user equipment, which can solve the problems of the prior art, such as improving a large peak-to-average power ratio (PAPR), a Cubic Metric (CM), and/or a Maximum Power Reduction (MPR), reducing power consumption, and/or improving reliability.

In a first aspect of the disclosure, a user equipment for resource selection includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to determine transmission resources including transmission resources for other purposes and to exclude transmission resources including transmission resources for other purposes from the set of candidate resources.

In a second aspect of the disclosure, a method for resource selection for a user equipment comprises determining transmission resources comprising transmission resources for other purposes and excluding transmission resources comprising transmission resources for other purposes from a set of candidate resources.

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

In a fourth aspect of the disclosure, a terminal device 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.

Brief Description of Drawings

In order to more clearly illustrate embodiments of the present disclosure or related art, the following drawings will be described in the briefly introduced embodiments. It is clear that the figures are only some embodiments of the present disclosure, from which other figures can be derived by a person skilled in the art without setting a precondition.

FIG. 1 is a schematic diagram of an exemplary illustration of mode 1 in a new wireless vehicle-to-anything (NR-V2X) transmission.

Fig. 2 is a schematic diagram of an exemplary illustration of mode 2 in NR-V2X transmission.

FIG. 3 is a schematic diagram of an exemplary illustration of a Resource Pool (RP) configuration.

FIG. 4 is a schematic diagram of an exemplary illustration of a detection window and a resource selection window.

Fig. 5 is a block diagram of a user equipment and a network node for detecting operations and resource selection according to an embodiment of the present disclosure.

Fig. 6 is a flowchart illustrating a method for detection operation and resource selection of a user equipment according to an embodiment of the present disclosure.

Fig. 7 is a schematic diagram of an exemplary illustration of a resource selection window according to an embodiment of the disclosure.

Fig. 8 is a schematic diagram of an exemplary illustration of a detection window and a resource selection window according to an embodiment of the present disclosure.

Fig. 9 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 are described in detail below with reference to the accompanying drawings by technical subject matters, structural features, achieved objects, and effects. 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.

Fig. 4 is an exemplary illustration of a detection window and a resource selection window. Fig. 4 illustrates that, in some embodiments, a User Equipment (UE) needs to perform a detection operation within a detection window prior to resource selection. The UE will detect the Physical Sidelink Control Channel (PSCCH) from other UEs. If the PSCCH is detected by the UE, the UE will measure the PSCCH reference signal received power (psch-RSRP) based on the demodulation reference signal (DMRS) of the PSCCH scheduled by the PSCCH. The UE will exclude the reserved transmission resources from the candidate resources if the psch-RSRP is above a threshold RSRP-thd and the resource reservation indicator in the detected PSCCH indicates that it will reserve transmission resources within the resource selection window. This may avoid transmission collisions with other UEs. The threshold RSRP-thd is determined by the priority included in the detected PSCCH and/or the priority of the packet to be transmitted.

After the resource exclusion process, if the number of candidate transmission resources within the resource selection window is less than 20% of the total number of transmission resources of the resource selection window, the UE increases the threshold RSRP-thd by 3dB and repeats the exclusion process until the number of candidate transmission resources within the resource selection window is greater than or equal to 20% of the total number of transmission resources of the resource selection window.

Within the remaining candidate resources, the UE will measure the energy, e.g., Received Signal Strength Indication (RSSI), of each subchannel. A subchannel is the smallest granularity of a Resource Pool (RP) in the frequency domain. The subchannels include N consecutive Physical Resource Blocks (PRBs), e.g., N is 4, 5, 6, 8, 10, 20, or others. The UE will then select one of the 20% resources with the smallest energy among the remaining candidate resources with equal probability.

Fig. 5 illustrates that in some embodiments, a User Equipment (UE)10 and a network node 20, e.g. a base station, for detecting operations and resource selection according to embodiments of the present disclosure are provided. The UE 10 may include a processor 11, a memory 12, and a transceiver 13. The network node 20 may comprise a processor 21, a memory 22 and a transceiver 23. The

processor

11 or 21 may be configured to implement the proposed functions, processes and/or methods described in this description. The layers of the radio interface protocol may be implemented in the

processor

11 or 21. The

memory

12 or 22 is operatively coupled with the

processor

11 or 21 and stores various information to operate the

processor

11 or 21. The

transceiver

13 or 23 is operatively coupled with the

processor

11 or 21, and the

transceiver

13 or 23 transmits and/or receives wireless signals.

The

processor

11 or 21 may comprise an Application Specific Integrated Circuit (ASIC), other chipset, logic circuit and/or data processing device. The

memory

12 or 22 may include Read Only Memory (ROM), Random Access Memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. The

transceiver

13 or 23 may include a baseband circuit to process radio frequency signals. When an embodiment is 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 or 22 and executed by the

processor

11 or 21. The

memory

12 or 22 may be implemented within the

processor

11 or 21 or external to the

processor

11 or 21, in which case the

memory

12 or 22 may be communicatively coupled to the

processor

11 or 21 via various means as is known in the art.

According to sidelink technologies developed under third generation partnership project (3GPP) releases 14, 15, 16 and beyond, communications between UEs involve vehicle-to-anything (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 via a sidelink interface, such as a PC5 interface.

In some embodiments, the processor 11 is configured to determine transmission resources comprising transmission resources for other purposes and to exclude transmission resources comprising transmission resources for other purposes from the set of candidate resources.

In some embodiments, the transmission resources for other purposes include a plurality of resources for one of physical sidelink broadcast channel transmission (PSBCH), sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission. In some embodiments, the transmission resources used for other purposes include a plurality of resources for Uplink (UL) transmission. In some embodiments, the transmission resources are within a resource selection window.

In some embodiments, for periodic transmissions, the first transmission resource is within a resource selection window, the processor 11 is configured to multiplex the same first transmission resource in subsequent transmission periods, and if the first transmission resource in one of the transmission periods comprises a transmission resource for other purposes, the first transmission resource in the resource selection window is excluded from the set of candidate resources. In some embodiments, the processor 11 is configured to generate a number indicating a number of cycles for use of the first transmission resource by the processor 11.

In some embodiments, after each cycle, the number indicating the number of cycles for use of the first transmission resource by the processor 11 is reduced by 1. In some embodiments, the processor 11 performs a resource reselection if a number indicating a number of cycles for using the first transmission resource by the processor 11 is equal to 0. According to the current LTE detection mechanism, when the number is equal to 1, the UE will randomly generate a number within [0,1] and compare with a threshold, if greater than the threshold, the UE will perform resource reselection when the number is 0, otherwise, the UE will continue to use the same resource.

In some embodiments, after resource exclusion, processor 11 calculates the energy of each transmission resource if the number of transmission resources in the candidate resource set is greater than or equal to a proportion (proportional) of the total number of transmission resources in the resource selection window. In some embodiments, the energy is calculated by monitoring the respective transmission resources in the detection window. In some embodiments, the processor 11 measures the energy even if the respective transmission resources in the detection window comprise transmission resources for other purposes.

In some embodiments, if the second transmission resource in the resource selection window corresponds to a third transmission resource in the detection window and the third transmission resource comprises a transmission resource for other purposes, the processor 11 measures the energy of the third transmission resource to determine whether the second transmission resource is to be used.

In some embodiments, the processor 11 excludes the fourth transmission resource from the candidate resource set if the fourth transmission resource in the resource selection window corresponds to the fifth transmission resource in the detection window and the fifth transmission resource comprises a transmission resource for other purposes.

In some embodiments, after calculating the energy of each transmission resource, the processor 11 selects a proportion of the transmission resources having the smallest energy, wherein the transmission resources of these transmission resources are selected with equal probability.

Fig. 6 illustrates a method 200 for detection operation and resource selection for a user equipment according to an embodiment of the disclosure. In some embodiments, method 200 includes: a block 202 of determining transmission resources including transmission resources for other purposes; and a block 204 of excluding transmission resources from the set of candidate resources including transmission resources for other purposes.

In some embodiments, the transmission resources for other purposes include a plurality of resources for one of Physical Sidelink Broadcast Channel (PSBCH) transmission, sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission. In some embodiments, the transmission resources used for other purposes include a plurality of resources for Uplink (UL) transmission. In some embodiments, the transmission resources are within a resource selection window.

In some embodiments, for periodic transmissions, the first transmission resource is within a resource selection window, the user equipment is configured to multiplex the same first transmission resource in subsequent transmission periods, and if the first transmission resource in one of the transmission periods comprises a transmission resource for other purposes, the first transmission resource in the resource selection window is excluded from the set of candidate resources. In some embodiments, the user equipment is configured to generate a number indicating a number of cycles for use of the first transmission resource by the user equipment.

In some embodiments, after each period, the number indicating the number of periods for use of the first transmission resource by the user equipment is reduced by 1. In some embodiments, the user equipment performs resource reselection if a number indicating a number of cycles for use of the first transmission resource by the user equipment is equal to 0. According to the current LTE detection mechanism, when the number is equal to 1, the UE will generate a number within [0,1] and compare with the threshold, if greater than the threshold, when the number is 0, the UE will perform resource reselection, otherwise, the UE will continue to use the same resource.

In some embodiments, after resource exclusion, the UE calculates an energy for each transmission resource if the number of transmission resources in the candidate resource set is greater than or equal to a proportion of the total number of transmission resources in the resource selection window. In some embodiments, the energy is calculated by monitoring the respective transmission resources in the detection window. In some embodiments, the user equipment measures the energy even if the respective transmission resources in the detection window comprise transmission resources for other purposes. The transmission resources may be used to carry Sidelink (SL) data to be transmitted.

In some embodiments, if the second transmission resource in the resource selection window corresponds to a third transmission resource in the detection window and the third transmission resource includes a transmission resource for other purposes, the user equipment measures an energy of the third transmission resource to determine whether the second transmission resource is to be used.

In some embodiments, the user equipment excludes the fourth transmission resource from the candidate resource set if the fourth transmission resource in the resource selection window corresponds to the fifth transmission resource in the detection window and the fifth transmission resource comprises a transmission resource for other purposes.

In some embodiments, after calculating the energy of each transmission resource, the user equipment selects a proportion of the transmission resources having the smallest energy, wherein transmission resources of the transmission resources are selected with equal probability.

Fig. 7 is an exemplary illustration of a resource selection window according to an embodiment of the disclosure. Fig. 7 illustrates that in some embodiments, transmission resources including reserved transmission resources for other purposes are excluded from the set of candidate resources. The reserved resources may be used for other purposes. For example, one resource or some resources will be used for PSBCH transmission. If NR-V2X is deployed in a shared carrier, both the Sidelink (SL) and Uplink (UL) will use UL transmission resources. Some UL transmission resources may be reserved for resources of the PRACH. Although the psch RP covers reserved transmission resources, it cannot map the pschs on these resources to avoid non-contiguous psch resource mapping in the frequency domain.

If all transmission resources within the resource selection window are placed in a set of resources that can be considered as a candidate set of resources, then transmission resources including reserved transmission resources will be excluded from the set of resources. Some examples are shown in fig. 7. Fig. 7 illustrates that in some embodiments, the resource selection window includes two slots, e.g., slot n +1 and slot n + 2. There are 4 subchannels, e.g., subchannel 0, subchannel 1, subchannel 2, and subchannel 3, in each slot, and each subchannel includes 4 PRBs. The third PRB in subchannel 2 in slot n +2 is used for PSBCH transmission.

In some embodiments, the number of subchannels used for the psch depends on the packet size to be transmitted. If there is only one subchannel for each psch, there are a total of 8 transmission resources for the psch within the resource selection window. The transmission resource is used for mapping the psch. The resource set will comprise 8 transmission resources. Subchannel 2 in slot n +2 will be excluded from the set of resources because subchannel 2 in slot n +2 comprises a non-contiguous PRB. The other 7 subchannels may be used as candidate transmission resources. Further, whether the remaining 7 transmission resources can be used depends on the detection result. For example, if some transmission resources in the set of resources are reserved by other UEs, these resources are also excluded from the set of resources.

In another example, if the fourth PRB in subchannel 3 in slot n +2 is also reserved for other purposes, then the transmission resources comprising subchannel 3 in slot n +2 will also be excluded from the set of resources. Although the remaining 3 PRBs in sub-channel 3 are still contiguous, the number of PRBs used for the psch is small compared to other transmission resources, which will result in a higher coding rate for the psch. Then the remaining 3 PRBs in subchannel 3 will also be excluded.

In another illustration, one psch is mapped to 2 consecutive subchannels. For example, the pschs may be mapped to subchannels 0 and 1, or subchannels 1 and 2, or subchannels 2 and 3 in slots n +1 and n + 2. There are then a total of 6 transmission resources in the resource set. Transmission resources including reserved resources for other purposes are excluded from the set of resources. For example, in fig. 7, transmission resources including subchannels 1 and 2 in slot n +2 and transmission resources including subchannels 2 and 3 in slot n +2 would be excluded from the set of resources. Further, whether the remaining 4 transmission resources can be used may depend on the detection result. For example, if some transmission resources in the set of resources are reserved by other UEs, these resources are also excluded from the set of resources. For example, if subchannel 1 in slot n +1 is reserved by other UEs, then the transmission resources comprising subchannel 1 in slot n +1 are also excluded from the set of resources. For example, transmission resources including subchannels 0 and 1 in slot n +1 and transmission resources including subchannels 1 and 2 in slot n +1 would be excluded from the set of resources.

Fig. 8 is an exemplary illustration of a detection window and a resource selection window according to an embodiment of the disclosure. Fig. 8 illustrates that, in some embodiments, for periodic transmission, if transmission resources K are to be used in one of the next M transmission periods and transmission resources K include reserved transmission resources for other purposes, then transmission resources K in the resource selection window corresponding to transmission resources K in a later transmission period are excluded from the set of candidate resources.

For periodic service or transmission, when transmission resources are selected, the UE will reserve the same transmission resources in a later period, so that the UE does not need to perform resource selection for each packet. Other UEs may know by detection that resources are reserved by the UE so that other UEs will try to avoid using the same transmission resources to avoid transmission collisions.

For example, in fig. 1, 8, the period is 100 ms. If the UE selects transmission resources k in the resource selection window, the UE may reserve the transmission resources k in the following period. For example, the UE may multiplex the same transmission resources for the next two transmission periods. If the transmission resources K in the third transmission period comprise reserved transmission resources for other purposes or the transmission resources K will collide with reserved transmission resources for other purposes, e.g. PSBCH or PRACH, the transmission resources K within the selection window will be excluded from the set of resources. The set of resources includes all transmission resources within the resource selection window during initialization.

Alternatively, the UE will generate a number C indicating the number of cycles the UE will reserve resources. After each cycle, the number will be decreased by 1. If the number is equal to 0, the UE will perform a resource reselection. According to the current LTE detection mechanism, when the number is equal to 1, the UE will randomly generate a number within [0,1] and compare with a threshold, if greater than the threshold, when the number is 0, the UE will perform resource reselection, otherwise the UE will continue to use the same resource. The UE may determine whether the reserved resources in the following C-interval period include reserved resources or collide with transmission resources used for other purposes, such as PSBCH or PRACH. If so, the resource is excluded from the set of resources. If not, the UE may use the selected and reserved transmission resources for packet transmission.

In some embodiments, if the transmission resource Q within the resource selection window corresponds to the transmission resource Q within the detection window and the transmission resource Q comprises a reserved transmission resource for other purposes, the UE will measure the energy of the transmission resource Q, e.g. RSSI, to determine whether the transmission resource Q can be used or the UE will exclude the transmission resource Q from the set of resources.

In some embodiments, after resource exclusion, if the number of transmission resources in the set of transmission resources is greater than a proportion, e.g., 20%, of the total number of transmission resources within the resource selection window, the UE will calculate an energy, e.g., RSSI, for each transmission resource. The energy is calculated by monitoring the corresponding transmission resources within the detection window. In some embodiments, the UE will measure energy, e.g. RSSI, even if the respective transmission resources within the detection window comprise reserved transmission resources for other purposes.

In some embodiments, after that, the UE will select the 20% transmission resources with the lowest/smallest energy, wherein the transmission resources of these are selected with equal probability.

It should be understood that the above embodiments have exemplified reserving transmission resources to explain how detection and resource selection are performed, but it may also be applied to any other situation that may result in non-contiguous pscch resource mapping. It should be understood that reserved transmission resources for other purposes means that the transmission resources are not used for the psch or PSCCH. It should be understood that the embodiments presented in this disclosure are only part of the detection process or resource selection process, and that there may be additional processes for detection or resource selection.

In summary, some embodiments address the issues described in the foregoing description. The resource selection process may be as follows.

1. Transmission resources including reserved transmission resources for other purposes are excluded from the set of candidate resources.

2. For periodic transmission, if a transmission resource K is to be used in one of the next M transmission periods and comprises reserved transmission resources for other purposes, the transmission resource K in the resource selection window corresponding to the transmission resource K in the following transmission period is excluded from the candidate resource set.

3. If the transmission resource Q within the resource selection window corresponds to the transmission resource Q within the detection window and the transmission resource Q comprises reserved transmission resources for other purposes, the UE will measure the energy, e.g. RSSI, of the transmission resource Q to determine whether the transmission resource Q can be used or not

Fig. 9 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 within a system using any suitably configured hardware and/or software. Fig. 9 shows a system 700 that includes at least 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 each other 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 special-purpose processors (e.g., a graphics processor and 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 wireless control functions that enable communication with one or more wireless networks through the radio frequency circuitry. The wireless 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 wireless 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 Area Networks (WPANs). Embodiments in which the baseband circuitry is configured to support wireless communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

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

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

In various embodiments, the transmitter circuitry, control circuitry, or receiver 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. In some embodiments, the electronic device 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. The memory/storage of one embodiment may comprise 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, the 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 to interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touch pad, 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 detection 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 radio frequency circuitry to communicate with components of a positioning network, such as Global Positioning System (GPS) satellites.

In various embodiments, display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, system 700 may be a mobile computing device, such as, but not limited to, a laptop 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.

Some embodiments of the present disclosure provide a user equipment and a method for a detection operation and resource selection of the user equipment, which can solve the problems of the prior art, such as improving a large peak-to-average power ratio (PAPR), a Cubic Metric (CM), and/or a Maximum Power Reduction (MPR), reducing power consumption, and/or improving reliability. Embodiments of the present disclosure are a combination of techniques/processes that may be employed in 3GPP specifications to create an end product.

One of ordinary skill in the art understands 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 conditions and design requirements of the application of the solution. Those of ordinary skill in the art may implement the functionality of 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 he/she may refer to the working of the systems, devices and units in the above-mentioned embodiments, since the working of the above-mentioned systems, devices and units is substantially the same. For ease of description and simplicity, these operations will not be described in detail.

It should be understood that the disclosed systems, devices, and methods in embodiments of the present disclosure may be implemented in other ways. The above-mentioned embodiments are merely exemplary. The division of cells is based solely on logic functions, while other divisions exist in implementations. Multiple units or components may be combined or integrated in another system. It is also possible to omit or skip certain features. On the other hand, the mutual coupling, direct coupling or communicative coupling shown or discussed is operated through some ports, devices or units, whether indirectly or communicatively through electrical, mechanical or other forms.

Units that are separate components for illustration are physically separate or not. The unit for displaying is or is not a physical unit, 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, may be physically separate, or may be 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 solutions proposed by the present disclosure can be basically or partially implemented in the form of software products. Alternatively, portions of the technical solutions that are advantageous to the conventional art may be implemented in the form of software products. The software product in a computer is stored in a storage medium that includes a plurality of commands for causing a computing device (e.g., a personal computer, server, or network device) to perform all or some of the steps disclosed in 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 made without departing from the scope of the broadest interpretation of the appended claims.

Claims

1. A user equipment for detecting operations and resource selection, comprising:

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver;

wherein the processor is configured to:

determining transmission resources including transmission resources for other purposes; and

excluding the transmission resources including the transmission resources for other purposes from a candidate resource set.

2. The user equipment of claim 1, wherein the transmission resources for other purposes comprise a plurality of resources for one of Physical Sidelink Broadcast Channel (PSBCH) transmission, sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission.

3. The user equipment of claim 1, wherein the transmission resources for other purposes comprise a plurality of resources for uplink, UL, transmission.

4. The user equipment of any of claims 1 to 3, wherein the transmission resources are within a resource selection window.

5. The user equipment according to any of claims 1 to 3, wherein for periodic transmissions a first transmission resource is within a resource selection window, the processor is configured to multiplex the same first transmission resource in subsequent transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource for other purposes, the first transmission resource in the resource selection window is excluded from the set of candidate resources.

6. The user equipment of claim 5, wherein the processor is configured to generate a number indicating a number of cycles for using the first transmission resource by the processor.

7. The user equipment of claim 6, wherein after each cycle, the number indicating the number of cycles for using the first transmission resource by the processor is reduced by 1.

8. The user equipment of claim 7, wherein the processor performs resource reselection if the number indicating the number of cycles for using the first transmission resource by the processor is equal to 0.

9. The user equipment of any of claims 1-8, wherein after resource exclusion, the processor calculates an energy per transmission resource if a number of transmission resources in the candidate resource set is greater than or equal to a proportion of the total number of transmission resources in the resource selection window.

10. The user equipment of claim 9, wherein the energy is calculated by monitoring the respective transmission resources in the detection window.

11. The user equipment of claim 10, wherein the processor measures the energy even if the respective transmission resources in the detection window include the transmission resources for other purposes.

12. The user equipment of any of claims 9 to 11, wherein if a second transmission resource in a resource selection window corresponds to a third transmission resource in a detection window and the third transmission resource comprises the transmission resource for other purposes, the processor measures an energy of the third transmission resource to determine whether the second transmission resource is to be used.

13. The user equipment according to any of claims 9 to 12, after calculating the energy of each transmission resource, the processor selects a proportion of transmission resources with the smallest energy, wherein transmission resources of the transmission resources are selected with equal probability.

14. The user equipment of any of claims 1 to 8, wherein the processor excludes a fourth transmission resource from the set of candidate resources if the fourth transmission resource in a resource selection window corresponds to the fifth transmission resource in a detection window and the fifth transmission resource comprises the transmission resource for other purposes.

15. A method for resource selection for a user equipment, comprising:

16. The method of claim 15, wherein the transmission resources for other purposes comprise a plurality of resources for one of Physical Sidelink Broadcast Channel (PSBCH) transmission, sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission.

17. The method of claim 15, wherein the transmission resources for other purposes comprise a plurality of resources for uplink, UL, transmission.

18. The method of any of claims 15 to 17, wherein the transmission resources are within a resource selection window.

19. The method according to any of claims 15 to 17, wherein for periodic transmissions a first transmission resource is within a resource selection window, the user equipment is configured to multiplex the same first transmission resource in subsequent transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource for other purposes, the first transmission resource in the resource selection window is excluded from the set of candidate resources.

20. The method of claim 19, wherein the user equipment is configured to generate a number indicating a number of cycles for use of the first transmission resource by the user equipment.

21. The method of claim 20, wherein after each period, the number indicating the number of periods for using the first transmission resource by the user equipment is reduced by 1.

22. The method of claim 21, wherein the user equipment performs resource reselection if the number indicating the number of cycles for using the first transmission resource by the user equipment is equal to 0.

23. The method according to any of claims 15 to 22, wherein after resource exclusion, the user equipment calculates the energy per transmission resource if the number of transmission resources in the candidate resource set is greater than or equal to a proportion of the total number of transmission resources in the resource selection window.

24. The method of claim 23, wherein the energy is calculated by monitoring the respective transmission resources in the detection window.

25. The method of claim 24, wherein the user equipment measures the energy even if the respective transmission resources in the detection window include the transmission resources for other purposes.

26. The method of any of claims 23 to 25, wherein if a second transmission resource in a resource selection window corresponds to a third transmission resource in a detection window and the third transmission resource comprises the transmission resource for other purposes, the user equipment measures an energy of the third transmission resource to determine whether the second transmission resource is to be used.

27. The method according to any of claims 23 to 26, after calculating the energy of each transmission resource, the user equipment selects a proportion of transmission resources with the smallest energy, wherein transmission resources of the transmission resources are selected with equal probability.

28. The method according to any of claims 15 to 22, wherein the user equipment excludes a fourth transmission resource from the set of candidate resources if the fourth transmission resource in a resource selection window corresponds to the fifth transmission resource in a detection window and the fifth transmission resource comprises the transmission resource for other purposes.

29. 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 one of claims 15 to 28.

30. A terminal device, 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 of any of claims 15 to 28.