WO2020233189A1

WO2020233189A1 - User equipment and method for resource selection of same

Info

Publication number: WO2020233189A1
Application number: PCT/CN2020/077662
Authority: WO
Inventors: Zhenshan Zhao; Qianxi Lu; Huei-Ming Lin
Original assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority date: 2019-05-20
Filing date: 2020-03-03
Publication date: 2020-11-26
Also published as: CN112771951A

Abstract

A user equipment and a method for sensing operation and resource selection of the same are provided. The method includes determining a transmission resource comprising a transmission resource used for other purpose and excluding the transmission resource comprising the transmission resource used for the other purpose from a candidate resource set.

Description

USER EQUIPMENT AND METHOD FOR RESOURCE SELECTION OF SAME

BACKGROUND OF 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 same.

2. Description of Related Art

New radio vehicle-to-everything (NR-V2X) is a technique based on device-to-device (D2D) . There are two transmission modes introduced in NR-V2X, such as a mode 1 and a mode 2. An example is illustrated in FIG. 1, in the mode 1, a sidelink (SL) transmission resource is allocated by a network. Both dynamic scheduling, such as based on downlink control information (DCI) , and/or semi-static scheduling, such as based on a configured grant, are supported in the mode 1. The mode 1 can only be applied to in coverage (IC) user equipment (UE) . An example is illustrated in FIG. 2, in the mode 2, a SL transmission resource is selected by a transmitter UE. A resource pool (RP) can be pre-configured or configured by a network. Within the resource pool, the transmitter UE can autonomously select a transmission resource for a SL transmission. The mode 2 can be applied to both in coverage UE and out of coverage (OOC) UE.

There are two ways for a UE to perform a resource selection, such as a random operation and a sensing operation. At the random operation, within a RP, the UE randomly selects a transmission resource. For example, the UE can select a resource with equal probability within the RP. At the sensing operation, the UE selects a transmission resource for a SL transmission within a resource selection window based on a sensing result. If a packet is available, or a resource (re-) selection procedure is triggered at a slot n, the UE will select a transmission resource from a resource selection window [n+T1, n+T2] , where T1 is determined by a UE capability, such as a processing delay. T2 is determined by a packet delay budget. Firstly, the UE will assume all of transmission resources within the resource selection window as candidate transmission resources. Then the UE will exclude some transmission resources within the resource selection window if the transmission resources will collide with other UEs, or if it does not have sensing results on the transmission resources.

In long term evolution V2X (LTE-V2X) , a RP configuration only includes continuous physical resource blocks (PRBs) in a frequency domain. In that case, a physical sidelink shared channel (PSSCH) can only be mapped onto continuous PRBs if continuous sub-channels are used. FIG. 3 illustrates a RP configuration. While in NR-V2X, a RP configuration can include non-continuous PRBs in a frequency domain. In one example, in FIG. 3, there is a PSSCH RP, which includes 4 sub-channels, such as a sub-channel 0, a sub-channel 1, a sub-channel 2, and a sub-channel 3. Each sub-channel includes 4 PRBs. One of the PRBs in the sub-channel 2 is reserved or used for other purpose. In this case, a PSSCH can be mapped to either continuous PRBs or non-continuous PRBs. For example, if the PSSCH is only mapped to the sub-channel 0 and the sub-channel 1, which are continuous in a frequency domain. If the PSSCH is mapped to the sub-channel 2 and the sub-channel 3, because the PSSCH cannot occupy a resource which is used for other purpose, then the PSSCH can only be mapped to 3 PRBs in the sub-channel 2 and 4 PRBs in the sub-channel 3. That will cause non-continuous PRB mapping of PSSCH. A PSSCH mapped to non-continuous PRBs will cause large peak to average power ratio (PAPR) , cubic metric (CM) , and/or maximal power reduction (MPR) .

Therefore, there is a need to propose a user equipment and a method for resource selection of the same capable of solving issues of the prior art, for example, improving large peak to average power ratio (PAPR) , cubic metric (CM) , and/or maximal power reduction (MPR) , reducing power consumption, and/or improving reliability.

SUMMARY

An object of the present disclosure is to propose a user equipment and a method for resource selection of the same capable of solving issues of the prior art, for example, improving large peak to average power ratio (PAPR) , cubic metric (CM) , and/or maximal power reduction (MPR) , reducing power consumption, and/or improving reliability.

In a first aspect of the present 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 a transmission resource including a transmission resource used for other purpose and exclude the transmission resource including the transmission resource used for the other purpose from a candidate resource set.

In a second aspect of the present disclosure, a method for resource selection of a user equipment includes determining a transmission resource comprising a transmission resource used for other purpose and excluding the transmission resource comprising the transmission resource used for the other purpose from a candidate resource set.

In a third aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, 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.

BRIEF DESCRIPTION OF DRAWINGS

In order to more clearly illustrate the embodiments of the present disclosure or related art, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.

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

FIG. 2 is a schematic diagram of an exemplary illustration of a mode 2 in a 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 sensing window and a resource selection window.

FIG. 5 is a block diagram of a user equipment and a network node for sensing operation and resource selection according to an embodiment of the present disclosure.

FIG. 6 is a flowchart illustrating a method for sensing 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 present disclosure.

FIG. 8 is a schematic diagram of an exemplary illustration of a sensing 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 according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.

FIG. 4 is an exemplary illustration of a sensing window and a resource selection window. FIG. 4 illustrates that, in some embodiments, before a resource selection, a user equipment (UE) needs to perform a sensing operation within a sensing window. The UE will detect a physical sidelink control channel (PSCCH) from other UEs. If the PSCCH is detected by the UE, the UE will measure a PSSCH reference signal receive power (PSSCH-RSRP) based on a demodulation reference signal (DMRS) of the PSSCH which is scheduled by the PSCCH. If the PSSCH-RSRP is higher than a threshold RSRP-thd, and a resource reservation indicator in the detected PSCCH shows that it will reserve a transmission resource within a resource selection window, the UE will exclude the reserved transmission resource from candidate resources. This can avoid a transmission collision with other UEs. The threshold RSRP-thd is determined by a priority which is included in the detected PSCCH and/or a priority of a packet to be transmitted.

After a resource exclusion procedure, if a number of candidate transmission resources within the resource selection window is less than 20%of a total number of transmission resources of the resource selection window, the UE will increase the threshold RSRP-thd by 3dB and repeat the above exclusion procedure 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 remaining candidate resources, the UE will measure an energy, such as a received signal strength indication (RSSI) , of each sub-channel. A sub-channel is a minimal granularity of a resource pool (RP) in a frequency domain. The sub-channel includes N continuous physical resource blocks (PRBs) , such as N is 4, 5, 6, 8, 10, 20, or other. Then, the UE will select one resource with equal probability within 20%resources which have a minimal energy within the remaining candidate resources.

FIG. 5 illustrates that, in some embodiments, a user equipment (UE) 10 and a network node 20 such as a base station for sensing operation and resource selection according to an embodiment 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 include a processor 21, a memory 22, and a transceiver 23. The

processor

11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of 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 a variety of 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 a radio signal.

The

processor

11 or 21 may include an application-specific integrated circuit (ASIC) , other chipsets, logic circuit and/or data processing devices. The

memory

12 or 22 may include a read-only memory (ROM) , a random access memory (RAM) , a flash memory, a memory card, a storage medium and/or other storage devices. The

transceiver

13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the

memory

12 or 22 and executed by the

processor

11 or 21. The

memory

12 or 22 can be implemented within the

processor

11 or 21 or external to the

processor

11 or 21, in which those can be communicatively coupled to the

processor

11 or 21 via various means are known in the art.

The communication between UEs relates to vehicle-to-everything (V2X) communication including vehicle-to-vehicle (V2V) , vehicle-to-pedestrian (V2P) , and vehicle-to-infrastructure/network (V2I/N) according to a sidelink technology developed under 3rd generation partnership project (3GPP) release 14, 15, 16, and beyond. UEs communicate with each other directly via a sidelink interface such as a PC5 interface.

In some embodiments, the processor 11 is configured to determine a transmission resource including a transmission resource used for other purpose and exclude the transmission resource including the transmission resource used for the other purpose from a candidate resource set.

In some embodiments, the transmission resource used for the other purpose includes a plurality of resources used for one of a 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 resource used for the other purpose includes a plurality of resources used for an uplink (UL) transmission. In some embodiments, the transmission resource is within a resource selection window.

In some embodiments, a period transmission, a first transmission resource is within a resource selection window, the processor 11 is configured to reuse the same first transmission resource in following transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource used for the other purpose, the first transmission resource in the resource selection window is excluded from the candidate resource set. In some embodiments, the processor 11 is configured to generate a number indicating a number of periodicities for using the first transmission resource by the processor 11.

In some embodiments, after each periodicity, the number indicating the number of the periodicities for using the first transmission resource by the processor 11 is decreased by 1. In some embodiments, if the number indicating the number of the periodicities for using the first transmission resource by the processor 11 is equal to 0, the processor 11 performs a resource re-selection. According to a current LTE sensing mechanism, when the number is equal to 1, a UE will randomly generate a number within [0, 1] and compared to a threshold, if larger than the threshold, the UE will do resource re-selection when the number is 0, otherwise the UE will continue to use the same resource.

In some embodiments, after a resource exclusion, if a number of transmission resources in the candidate resource set is greater than or equal to a proportional of a total number of the transmission resources in the resource selection window, the processor 11 calculates the energy of each transmission resource. In some embodiments, the energy is calculated by monitoring a corresponding transmission resource in the sensing window. In some embodiments, even if the corresponding transmission resource in the sensing window comprises the transmission resource used for the other purpose, the processor 11 measures the energy.

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

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

In some embodiments, after calculating the energy of each transmission resource, the processor 11 selects a proportional of transmission resources which have a minimal energy, among which one of the transmission resources is selected with equal probability.

FIG. 6 illustrates a method 200 for sensing operation and resource selection of a user equipment according to an embodiment of the present disclosure. In some embodiments, the method 200 includes: a block 202, determining a transmission resource including a transmission resource used for other purpose, and a block 204, excluding the transmission resource comprising the transmission resource used for the other purpose from a candidate resource set.

In some embodiments, a period transmission, a first transmission resource is within a resource selection window, the user equipment is configured to reuse the same first transmission resource in following transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource used for the other purpose, the first transmission resource in the resource selection window is excluded from the candidate resource set. In some embodiments, the user equipment is configured to generate a number indicating a number of periodicities for using the first transmission resource by the user equipment.

In some embodiments, after each periodicity, the number indicating the number of the periodicities for using the first transmission resource by the user equipment is decreased by 1. In some embodiments, if the number indicating the number of the periodicities for using the first transmission resource by the user equipment is equal to 0, the user equipment performs a resource re-selection. According to a current LTE sensing mechanism, when the number is equal to 1, a UE will generate a number within [0, 1] and compared to a threshold, if larger than the threshold, the UE will do resource re-selection when the number is 0, otherwise the UE will continue to use the same resource.

In some embodiments, after a resource exclusion, if a number of transmission resources in the candidate resource set is greater than or equal to a proportional of a total number of the transmission resources in the resource selection window, the user equipment calculates the energy of each transmission resource. In some embodiments, the energy is calculated by monitoring a corresponding transmission resource in the sensing window. In some embodiments, even if the corresponding transmission resource in the sensing window comprises the transmission resource used for the other purpose, the user equipment measures the energy. The transmission resource can be used to carry sidelink (SL) data to be transmitted.

In some embodiments, if a second transmission resource in a resource selection window corresponds to a third transmission resource in a sensing window, and the third transmission resource comprises the transmission resource used for the other purpose, the user equipment measures energy of the third transmission resource to determine whether the second transmission resource to be used.

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

In some embodiments, after calculating the energy of each transmission resource, the user equipment selects a proportional of transmission resources which have a minimal energy, among which one of the transmission resources is selected with equal probability.

FIG. 7 is an exemplary illustration of a resource selection window according to an embodiment of the present disclosure. FIG. 7 illustrates that, in some embodiments, a transmission resource which includes a reserved transmission resource for other purpose is excluded from a candidate resource set. The reserved resource can be used for other purpose. For example, a resource or some resources will be used for a PSBCH transmission. If NR-V2X deployed in a shared carrier, sidelink (SL) and uplink (UL) will both use a UL transmission resource. Some of the UL transmission resources can be reserved for a resource of a PRACH. Although a PSSCH RP covers reserved transmission resources, it cannot map a PSSCH on these resources to avoid a non-continuous PSSCH resource mapping in a frequency domain.

If all of transmission resources within a resource selection window is put into a resource set, which can be seen as a candidate resource set, then the transmission resource which includes the reserved transmission resource will be excluded from the resource set. Some examples are illustrated in FIG. 7. FIG. 7 illustrates that, in some embodiments, the resource selection window includes two slots, such as a slot n+1 and a slot n+2. Within each slot, there are 4 sub-channels, such as a sub-channel 0, a sub-channel 1, a sub-channel 2, and a sub-channel 3, and each sub-channel includes 4 PRBs. The 3rd PRB in the sub-channel 2 in the slot n+2 is used for a PSBCH transmission.

In some embodiments, a number of sub-channels used for the PSSCH depends on a packet size to be transmitted. If only one sub-channel is used for each PSSCH, there are totally 8 transmission resources for the PSSCH within the resource selection window. A transmission resource is used to map the PSSCH. The resource set will include 8 transmission resources. The sub-channel 2 in the slot n+2 will be excluded from the resource set because the sub-channel 2 in the slot n+2 includes non-continuous PRBs. The other 7 sub-channel can be used as candidate transmission resources. Furthermore, whether the remaining 7 transmission resources can be used depends on a sensing result. For example, if some of the transmission resources in the resource set are reserved by other UEs, then these resources are also excluded from the resource set.

In another example, if the 4th PRB in the sub-channel 3 in the slot n+2 is also reserved for other purpose. Then the transmission resource which includes the sub-channel 3 in the slot n+2 will also be excluded from the resource set. Although the remaining 3 PRBs in the sub-channel 3 is still continuous, while a number of the PRB used for the PSSCH is less compared to other transmission resources, that will cause higher coding rate of PSSCH. Then the remaining 3 PRBs in the sub-channel 3 will also be excluded.

In another illustration, one PSSCH is mapped to 2 continuous sub-channels. For example, a PSSCH can be mapped to sub-channels 0 and 1, or sub-channels 1 and 2, or sub-channels 2 and 3, in the slot n+1 and n+2. Then there are totally 6 transmission resources in the resource set. The transmission resource which includes the reserved resource for other purpose will be excluded from the resource set. For example, in FIG. 7, the transmission resource which includes the sub-channels 1 and 2 in the slot n+2, and the transmission resource which includes the sub-channels 2 and 3 in the slot n+2 will be excluded from the resource set. Furthermore, whether the remaining 4 transmission resources can be used can depend on the sensing result. For example, if some of the transmission resources in the resource set are reserved by other UEs, then these resources are also excluded from the resource set. For example, if the sub-channel 1 in the slot n+1 is reserved by other UEs, then the transmission resource which includes the sub-channel 1 in the slot n+1 is also excluded in the resource set. For example, the transmission resource which includes the sub-channels 0 and 1 in the slot n+1, and the transmission resource which includes the sub-channels 1 and 2 in the slot n+1 will be excluded from the resource set.

FIG. 8 is an exemplary illustration of a sensing window and a resource selection window according to an embodiment of the present disclosure. FIG. 8 illustrates that, in some embodiments, for a period transmission, if a transmission resource K which will be used in one of the following M transmission periodicities, and the transmission resource K includes a reserved transmission resource for other purpose, then a transmission resource k in the resource selection window which corresponds to the transmission resource K in later transmission periods is excluded from a candidate resource set.

For a periodic service or transmission, when a transmission resource is selected, the UE will reserve the same transmission resource in later periodicities, so that the UE doesn’t need to perform a resource selection for each packet. Other UEs can know that the resource is reserved by the UE by sensing, so that other UEs will try to avoid using the same transmission resource to avoid transmission collision.

For example, in FIG. 8, a periodicity is 100ms. If the UE selects a transmission resource k in the resource selection window, the UE can reserve the transmission resource k in the following periodicities. For example, the UE can reuse the same transmission resource within the following two transmission periods. If the transmission resource K in the third transmission period includes the reserved transmission resource for other purpose, or the transmission resource K will collide with the transmission resource for other purpose, such as PSBCH or PRACH, then the transmission resource k within the selection window will be excluded from the resource set. The resource set includes all of the transmission resources within the resource selection window during initialization.

Alternatively, the UE will generate a number C, which indicates the number of periodicities that the UE will reserve the resource. After each periodicity, the number will be decreased by 1. If the number is equal to 0, the UE will perform a resource re-selection. According to a current LTE sensing mechanism, when the number is equal to 1, a UE will randomly generate a number within [0, 1] and compared to a threshold, if larger than the threshold, the UE will do resource re-selection when the number is 0, otherwise the UE will continue to use the same resource. UE can determine whether the reserved resource within the following C periodicities includes the reserved resource or collides with the transmission resource for other purpose, such as PSBCH or PRACH. If yes, the resource is excluded from the resource set. If no, the UE can use the selected and reserved transmission resource for the packet transmission.

In some embodiments, if a transmission resource q within the resource selection window, corresponds to a transmission resource Q within the sensing window, and the transmission resource Q includes the reserved transmission resource for other purpose, the UE will measure an energy, such as RSSI, of the transmission resource Q to determine whether the transmission resource q can be used, or the UE will exclude the transmission resource q from the resource set.

In some embodiments, after resource exclusion, if the number of transmission resource within the transmission resource set is larger than a proportional, such as 20%, of the total number of transmission resources within the resource selection window, the UE will calculate the energy, such as RSSI, of each transmission resource. The energy is calculated by monitoring the corresponding transmission resource within the sensing window. In some embodiments, even if the corresponding transmission resource within the sensing window includes the reserved transmission resource for other purpose, the UE will measure the energy, such as RSSI.

In some embodiments, after that, the UE will select 20%transmission resources which have a minimal/smallest energy, among which one of transmission resources is selected with equal probability.

It is understood that, the above embodiments take the reserved transmission resource as an example to explain how to perform sensing and resource selection, it can also be applied to any other cases that can cause a non-continuous PSSCH resource mapping. It is understood that, the reserved transmission resource for other purpose means that the transmission resource is not used for PSSCH or PSCCH. It is understood that, the embodiments given in the present disclosure are only partial sensing procedure or resource selection procedure, there could be additional procedures for sensing or resource selection.

In summary, some embodiments target for the problem descripted in previous descriptions. The resource selection procedure can be as follows.

1. The transmission resource which includes the reserved transmission resource for other purpose is excluded from the candidate resource set.

2. For the period transmission, if a transmission resource K which will be used in one of the following M transmission periodicities, and the transmission resource includes the reserved transmission resource for other purpose, then the transmission resource k in the resource selection window which corresponds to the transmission resource K in later transmission periods 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 sensing window, and the transmission resource Q includes reserved transmission resource for other purpose, the UE will measure energy, such as RSSI, of the transmission resource Q to determine whether the transmission resource q can be used

FIG. 9 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software. FIG. 9 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated.

The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors 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 running on the system.

The baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include a baseband processor. The baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) . Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

In various embodiments, the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency. For example, in some embodiments, baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.

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

In various embodiments, the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency. For example, in some embodiments, RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.

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, the baseband circuitry, and/or the 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 a memory (shared, dedicated, or group) that execute 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 the circuitry may be implemented by, one or more software or firmware modules.

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

The memory/storage 740 may be used to load and store data and/or instructions, for example, for system. The memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM) ) , and/or non-volatile memory, such as flash memory.

In various embodiments, the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. 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 supply interface.

In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyro 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, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.

In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the 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, etc. In various embodiments, system may have more or less components, and/or different architectures. Where appropriate, 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 sensing operation and resource selection of the same capable of solving issues of the prior art, for example, improving large peak to average power ratio (PAPR) , cubic metric (CM) , and/or maximal power reduction (MPR) , reducing power consumption, and/or improving reliability. The embodiment of the present disclosure is a combination of techniques/processes that can be adopted in 3GPP specification to create an end product.

A person having ordinary skill in the art understands that each of the units, algorithm, and steps described and disclosed in the embodiments of the present disclosure are realized using electronic hardware or combinations of software for computers and electronic hardware. Whether the functions run in hardware or software depends on the condition of application and design requirement for a technical plan. A person having ordinary skill in the art can use different ways to realize the function for each specific application while such realizations should not go beyond the scope of the present disclosure. It is understood by a person having ordinary skill in the art that he/she can refer to the working processes of the system, device, and unit in the above-mentioned embodiment since the working processes of the above-mentioned system, device, and unit are basically the same. For easy description and simplicity, these working processes will not be detailed.

It is understood that the disclosed system, device, and method in the embodiments of the present disclosure can be realized with other ways. The above-mentioned embodiments are exemplary only. The division of the units is merely based on logical functions while other divisions exist in realization. It is possible that a plurality of units or components are combined or integrated in another system. It is also possible that some characteristics are omitted or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communicative coupling operate through some ports, devices, or units whether indirectly or communicatively by ways of electrical, mechanical, or other kinds of forms.

The units as separating components for explanation are or are not physically separated. The units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.

If the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product. Or, one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product. The software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM) , a random access memory (RAM) , a floppy disk, or other kinds of media capable of storing program codes.

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

Claims

A user equipment for sensing operation and resource selection, comprising:

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver;

wherein the processor is configured to:

determine a transmission resource comprising a transmission resource used for other purpose; and

exclude the transmission resource comprising the transmission resource used for the other purpose from a candidate resource set.
The user equipment of claim 1, wherein the transmission resource used for the other purpose comprises a plurality of resources used for one of a physical sidelink broadcast channel (PSBCH) transmission, sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission.
The user equipment of claim 1, wherein the transmission resource used for the other purpose comprises a plurality of resources used for an uplink (UL) transmission.
The user equipment of any one of claims 1 to 3, wherein the transmission resource is within a resource selection window.
The user equipment of any one of claims 1 to 3, wherein for a period transmission, a first transmission resource is within a resource selection window, the processor is configured to reuse the same first transmission resource in following transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource used for the other purpose, the first transmission resource in the resource selection window is excluded from the candidate resource set.
The user equipment of claim 5, wherein the processor is configured to generate a number indicating a number of periodicities for using the first transmission resource by the processor.
The user equipment of claim 6, wherein after each periodicity, the number indicating the number of the periodicities for using the first transmission resource by the processor is decreased by 1.
The user equipment of claim 7, wherein if the number indicating the number of the periodicities for using the first transmission resource by the processor is equal to 0, the processor performs a resource re-selection.
The user equipment of any one of claims 1 to 8, wherein after a resource exclusion, if a number of transmission resources in the candidate resource set is greater than or equal to a proportional of a total number of the transmission resources in the resource selection window, the processor calculates the energy of each transmission resource.
The user equipment of claim 9, wherein the energy is calculated by monitoring a corresponding transmission resource in the sensing window.
The user equipment of claim 10, wherein even if the corresponding transmission resource in the sensing window comprises the transmission resource used for the other purpose, the processor measures the energy.
The user equipment of any one of claims 9 to 11, wherein if a second transmission resource in a resource selection window corresponds to a third transmission resource in a sensing window, and the third transmission resource comprises the transmission resource used for the other purpose, the processor measures energy of the third transmission resource to determine whether the second transmission resource to be used.
The user equipment of any one of claims 9 to 12, after calculating the energy of each transmission resource, the processor selects a proportional of transmission resources which have a minimal energy, among which one of the transmission resources is selected with equal probability.
The user equipment of any one of claims 1 to 8, wherein if a fourth transmission resource in a resource selection window corresponds to a fifth transmission resource in a sensing window, and the fifth transmission resource comprises the transmission resource used for the other purpose, the processor excludes the fourth transmission resource from the candidate resource set.
A method for resource selection of a user equipment, comprising:

determining a transmission resource comprising a transmission resource used for other purpose; and

excluding the transmission resource comprising the transmission resource used for the other purpose from a candidate resource set.
The method of claim 15, wherein the transmission resource used for the other purpose comprises a plurality of resources used for one of a physical sidelink broadcast channel (PSBCH) transmission, sidelink primary synchronization signal (S-PSS) transmission, and sidelink secondary synchronization signal (S-SSS) transmission.
The method of claim 15, wherein the transmission resource used for the other purpose comprises a plurality of resources used for an uplink (UL) transmission.
The method of any one of claims 15 to 17, wherein the transmission resource is within a resource selection window.
The method of any one of claims 15 to 17, wherein for a period transmission, a first transmission resource is within a resource selection window, the user equipment is configured to reuse the same first transmission resource in following transmission periods, and if the first transmission resource in one of the transmission periods comprises the transmission resource used for the other purpose, the first transmission resource in the resource selection window is excluded from the candidate resource set.
The method of claim 19, wherein the user equipment is configured to generate a number indicating a number of periodicities for using the first transmission resource by the user equipment.
The method of claim 20, wherein after each periodicity, the number indicating the number of the periodicities for using the first transmission resource by the user equipment is decreased by 1.
The method of claim 21, wherein if the number indicating the number of the periodicities for using the first transmission resource by the user equipment is equal to 0, the user equipment performs a resource re-selection.
The method of any one of claims 15 to 22, wherein after a resource exclusion, if a number of transmission resources in the candidate resource set is greater than or equal to a proportional of a total number of the transmission resources in the resource selection window, the user equipment calculates the energy of each transmission resource.
The method of claim 23, wherein the energy is calculated by monitoring a corresponding transmission resource in the sensing window.
The method of claim 24, wherein even if the corresponding transmission resource in the sensing window comprises the transmission resource used for the other purpose, the user equipment measures the energy.
The method of any one of claims 23 to 25, wherein if a second transmission resource in a resource selection window corresponds to a third transmission resource in a sensing window, and the third transmission resource comprises the transmission resource used for the other purpose, the user equipment measures energy of the third transmission resource to determine whether the second transmission resource to be used.
The method of any one of claims 23 to 26, after calculating the energy of each transmission resource, the user equipment selects a proportional of transmission resources which have a minimal energy, among which one of the transmission resources is selected with equal probability.
The method of any one of claims 15 to 22, wherein if a fourth transmission resource in a resource selection window corresponds to a fifth transmission resource in a sensing window, and the fifth transmission resource comprises the transmission resource used for the other purpose, the user equipment excludes the fourth transmission resource from the candidate resource set.
A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 15 to 28.
A terminal device, comprising: a processor and a memory configured to store a computer program, the processor configured to execute the computer program stored in the memory to perform the method of any one of claims 15 to 28.