WO2019157739A1 - Équipement utilisateur et son procédé de communication sans fil - Google Patents

Équipement utilisateur et son procédé de communication sans fil Download PDF

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Publication number
WO2019157739A1
WO2019157739A1 PCT/CN2018/076881 CN2018076881W WO2019157739A1 WO 2019157739 A1 WO2019157739 A1 WO 2019157739A1 CN 2018076881 W CN2018076881 W CN 2018076881W WO 2019157739 A1 WO2019157739 A1 WO 2019157739A1
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WO
WIPO (PCT)
Prior art keywords
emption
signals
sidelink
user equipment
resources
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Application number
PCT/CN2018/076881
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English (en)
Inventor
Hai Tang
Huei-Ming Lin
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp., Ltd. filed Critical Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority to CN201880082658.8A priority Critical patent/CN111492708B/zh
Priority to PCT/CN2018/076881 priority patent/WO2019157739A1/fr
Publication of WO2019157739A1 publication Critical patent/WO2019157739A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to a user equipment and a method of wireless communication of same.
  • LTE long term evolution
  • Tx UE transmitting user equipment
  • Tx UE selects radio resources autonomously on its own within a sidelink resource pool for packet data transmissions.
  • multiple UEs contend for same set of resources without any central control.
  • most of UEs under current sidelink mode 4 operation are required to perform resource sensing before selection and re-selection of resources for transmission, there is still no guarantee that the selected resources from one UE may not collide with transmission from another UE, when both of the UEs select the same resource.
  • the two UEs cannot detect such Tx collision as the two UEs are not able to transmit and receive at the same time on the same carrier due to half-duplex limitation. Furthermore, there is also no mechanism for UE feedback such as from a third UE to report an occurrence of a collision.
  • An object of the present disclosure is to propose a user equipment (UE) and a method of wireless communication of same for providing a resource pre-emption and reservation mechanism for sidelink data transport blocks (TBs) transmissions.
  • UE user equipment
  • TBs sidelink data transport blocks
  • a user equipment for wireless communication includes a memory and a processor coupled to the memory.
  • the processor is configured to perform a wireless communication directly over a sidelink interface to at least one second user equipment, monitor and read at least one sidelink resource used by the at least one second user equipment, determine a plurality of first sidelink resources available for transmitting a plurality of pre-emption signals and a plurality of second sidelink resources available for transmitting a plurality of sidelink data transport blocks (TBs) , perform a plurality of pre-emption processes by transmitting the pre-emption signals for booking the second sidelink resources, and transmit the sidelink data TBs using booked second sidelink resources and reserve a plurality of same frequency resources using the second sidelink resources in a current transmission for a subsequent transmission.
  • TBs sidelink data transport blocks
  • the sidelink resources, the first sidelink resources, and the second sidelink resources are at least one of short transmission time interval (sTTI) sidelink resources and normal transmission time interval (nTTI) sidelink resources.
  • sTTI short transmission time interval
  • nTTI normal transmission time interval
  • the second sidelink resources are empty sidelink resources before performing the pre-emption processes, instead of being used by the at least one second user equipment.
  • each of the sTTI sidelink resources and the nTTI sidelink resources includes a guard period (GP) /automatic gain control (AGC) region, a control region for transmitting a physical sidelink control channel (PSCCH) carrying sidelink control information (SCI) , and a data region for at least one of transmitting the pre-emption signals and transmitting a physical sidelink shared channel (PSSCH) for transmitting the sidelink data TBs.
  • GP guard period
  • AGC automatic gain control
  • PSCCH physical sidelink control channel
  • SCI sidelink control information
  • PSSCH physical sidelink shared channel
  • the GP/AGC region has one symbol length, and the data region has at least 3 symbols in length.
  • the processor is further configured to sense the GP/AGC region of the first sidelink resource and/or read the control region of the first sidelink resource to determine a true availability of the first sidelink resource for transmitting the pre-emption signals.
  • the processor is further configured to transmit the pre-emption signals in the data region of the first sidelink resource.
  • the processor is further configured to perform a random selection with equal probability of two symbols out of a total number of symbols in the data region of the first sidelink resource for transmitting a pair of pre-emption signals.
  • each pre-emption signal has one symbol length and holds identical information as carried by another pre-emption signal.
  • the processor is further configured to transmit an information content in the pre-emption processes, the information content includes a time offset parameter indicating a time gap in terms of a number of sidelink resources or a number of milliseconds for booking the second sidelink resources, a ProSe per packet priority (PPPP) level, a user equipment source identity, and/or a destination identity.
  • PPPP ProSe per packet priority
  • the processor is further configured to reserve the same frequency resources by indicating a time offset in the SCI of the second sidelink resource.
  • the processor is further configured to monitor and read a plurality of second pre-emption signals transmitted by the at least one second user equipment, and the processor is further configured to detect the second pre-emption signals on the first sidelink resources being not overlapped with the pre-emption signals.
  • the processor is further configured to detect the second pre-emption signals having a time gap with the pre-emption signals in a time domain.
  • the processor is further configured to monitor and read a plurality of second pre-emption signals transmitted by the at least one second user equipment, detect the pre-emption signals and the second pre-emption signals in different data regions of the first sidelink resources, detect the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and the processor is further configured to independently and randomly choose with equal probability with the at least one second user equipment whether or not continue to use the second sidelink resources after the same time period, or abandon the second sidelink resources and restart a same pre-emption process in a different empty sidelink resource.
  • the processor is further configured to monitor and read a plurality of second pre-emption signals transmitted by the at least one second user equipment, detect the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level greater than the first PPPP level in different data regions of the first sidelink resources, detect the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and the processor is further configured to abandon the second sidelink resources and restart a same pre-emption process in a different empty sidelink resource.
  • the processor is further configured to monitor and read a plurality of second pre-emption signals transmitted by the at least one second user equipment, detect the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level less than the first PPPP level in different data regions of the first sidelink resources, detect the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and the processor is further configured to continue to use the second sidelink resources after the same time period.
  • the processor is further configured to monitor and read a plurality of second pre-emption signals transmitted by the at least one second user equipment, detect the second pre-emption signals on the first sidelink resources, detect the second pre-emption signals having a time gap with the pre-emption signals in a time domain, detect a part of the second pre-emption signals being overlapped with a part of the pre-emption signals, and detect another part of the second pre-emption signals being not overlapped with another part of the pre-emption signals.
  • a number of the pre-emption processes is equal to a number of booking the second sidelink resources.
  • the processor is further configured to transmit the data TBs by an initial transmission and at least one re-transmission.
  • the processor is further configured to transmit the data TBs and reserve the same frequency resources repeatedly.
  • a method of wireless communication of a user equipment includes performing a wireless communication directly over a sidelink interface to at least one second user equipment, monitoring and reading at least one sidelink resource used by the at least one second user equipment, determining a plurality of first sidelink resources available for transmitting a plurality of pre-emption signals and a plurality of second sidelink resources available for transmitting a plurality of sidelink data transport blocks (TBs) , performing a plurality of pre-emption processes by transmitting the pre-emption signals for booking the second sidelink resources, and transmitting the sidelink data TBs using booked second sidelink resources and reserving a plurality of same frequency resources using the second sidelink resources in a current transmission for a subsequent transmission.
  • TBs sidelink data transport blocks
  • the sidelink resources, the first sidelink resources, and the second sidelink resources are at least one of short transmission time interval (sTTI) sidelink resources and normal transmission time interval (nTTI) sidelink resources.
  • sTTI short transmission time interval
  • nTTI normal transmission time interval
  • the second sidelink resources are empty sidelink resources before performing the pre-emption processes, instead of being used by the at least one second user equipment.
  • each of the sTTI sidelink resources and the nTTI sidelink resources includes a guard period (GP) /automatic gain control (AGC) region, a control region for transmitting a physical sidelink control channel (PSCCH) carrying sidelink control information (SCI) , and a data region for at least one of transmitting the pre-emption signals and transmitting a physical sidelink shared channel (PSSCH) for transmitting the sidelink data TBs.
  • GP guard period
  • AGC automatic gain control
  • PSCCH physical sidelink control channel
  • SCI sidelink control information
  • PSSCH physical sidelink shared channel
  • the GP/AGC region has one symbol length, and the data region has at least 3 symbols in length.
  • the method further includes sensing the GP/AGC region of the first sidelink resource and/or reading the control region of the first sidelink resource to determine a true availability of the first sidelink resource for transmitting the pre-emption signals.
  • the method further includes transmitting the pre-emption signals in the data region of the first sidelink resource.
  • the method further includes performing a random selection with equal probability of two symbols out of a total number of symbols in the data region of the first sidelink resource for transmitting a pair of pre-emption signals.
  • each pre-emption signal has one symbol length and holds identical information as carried by another pre-emption signal.
  • the method further includes transmitting an information content in the pre-emption processes.
  • the information content includes a time offset parameter indicating a time gap in terms of a number of sidelink resources or a number of milliseconds for booking the second sidelink resources, a ProSe per packet priority (PPPP) level, a user equipment source identity, and/or a destination identity.
  • PPPP ProSe per packet priority
  • the method further includes reserving the same frequency resources by indicating a time offset in the SCI of the second sidelink resource.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment, and detecting the second pre-emption signals on the first sidelink resources being not overlapped with the pre-emption signals.
  • the method further includes detecting the second pre-emption signals having a time gap with the pre-emption signals in a time domain.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment, detecting the pre-emption signals and the second pre-emption signals in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and independently and randomly choosing with equal probability with the at least one second user equipment whether or not continue to use the second sidelink resources after the same time period, or abandon the second sidelink resources and restart a same pre-emption process in a different empty sidelink resource.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment, detecting the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level greater than the first PPPP level in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, abandoning the second sidelink resources, and restarting a same pre-emption process in a different empty sidelink resource.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment, detecting the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level less than the first PPPP level in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and continuing to use the second sidelink resources after the same time period.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment, detecting the second pre-emption signals on the first sidelink resources, detecting the second pre-emption signals having a time gap with the pre-emption signals in a time domain, detecting a part of the second pre-emption signals being overlapped with a part of the pre-emption signals, and detecting another part of the second pre-emption signals being not overlapped with another part of the pre-emption signals.
  • a number of the pre-emption processes is equal to a number of booking the second sidelink resources.
  • the method further includes transmitting the data TBs by an initial transmission and at least one re-transmission.
  • the method further includes transmitting the data TBs and reserving the same frequency resources repeatedly.
  • the user equipment and the method of wireless communication of same provide a resource pre-emption and reservation mechanism for sidelink data transport blocks (TBs) transmissions in 5th generation new radio (5G-NR) system to reduce or even prevent transmitting (Tx) collisions from multiple transmitting UEs. Furthermore, in the embodiment, two contention resolution techniques are also given to resolve two UEs trying to pre-empt same sidelink resource for transmission.
  • the user equipment and the method of wireless communication of same in the embodiment also provide fast and reliable data transmission for NR-sidelink communication through resource pre-emption and reservation and/or contention resolution.
  • FIG. 1 is a block diagram of a user equipment for wireless communication with another user equipment according to an embodiment of the present disclosure.
  • FIG. 2 is a diagram of a structure of a sidelink resource according to an embodiment of the present disclosure.
  • FIG. 3 is a diagram of a structure of a sidelink resource pool according to an embodiment of the present disclosure.
  • FIG. 4 is a scenario of pre-emption signals being transmitted by different user equipments in the same data region according to an embodiment of the present disclosure.
  • FIG. 5 is a scenario of pre-emption signals being transmitted by different user equipments in the same data region according to an embodiment of the present disclosure.
  • FIG. 6 is a scenario of pre-emption signals being transmitted by different user equipments in the same data region according to an embodiment of the present disclosure.
  • FIG. 7 is a scenario of vehicle-to-everything (V2X) communication according to an embodiment of the present disclosure.
  • V2X vehicle-to-everything
  • FIG. 8 is a flowchart illustrating a method of wireless communication according to the present disclosure, from an aspect of operation of a user equipment for transmitting signals.
  • FIG. 1 and FIG. 2 illustrate that, in some embodiments, a user equipment 100 for wireless communication includes a memory 102 and a processor 104 coupled to the memory 102.
  • the processor 104 is configured to perform a wireless communication directly over a sidelink interface such as PC5 interface to at least one second user equipment 200, monitor and read at least one sidelink resource 311 used by the at least one second user equipment 200 such as a process 310, determine a plurality of first sidelink resources available for transmitting a plurality of pre-emption signals 322, 323, 324, and 325 and a plurality of second sidelink resources 332, 333, 334, and 335 available for transmitting a plurality of sidelink data transport blocks (TBs) , perform a plurality of pre-emption processes 320 by transmitting the pre-emption signals 322, 323, 324, and 325 for booking the second sidelink resources 332, 333, 334, and 335, and transmit the sidelink data TBs using booked second sidelink resources 332, 333, 334, and 3
  • the sidelink resources 311, the first sidelink resources, and the second sidelink resources 332, 333, 334, and 335 are at least one of short transmission time interval (sTTI) sidelink resources and normal transmission time interval (nTTI) sidelink resources.
  • the second sidelink resources 332, 333, 334, and 335 are empty sidelink resources before performing the pre-emption processes 320, instead of being used by the at least one second user equipment 200.
  • the user equipment 100 may be a user equipment for transmitting signals and the user equipment 200 may also be a user equipment for transmitting signals.
  • the communication between the user equipment 100 and the user equipment 200 over the sidelink interface such as the PC5 interface could be based on based on long term evolution (LTE) sidelink technology developed under 3rd generation partnership project (3GPP) and/or 5th generation new radio (5G-NR) radio access technology.
  • LTE long term evolution
  • 3GPP 3rd generation partnership project
  • 5G-NR 5th generation new radio
  • resource selection as part of nTTI or sTTI transmission procedure from the user equipment 100 includes performing the process 310 of monitoring at least one sidelink resource 311 and reading nTTI messages or sTTI messages using the at least one sidelink resource 311, performing the process 320 of pre-emption of the second sidelink resources 332, 333, 334, and 335 for nTTI transmissions or sTTI transmissions, and performing a process 330 of periodic data transmission (Tx) and reservation of next sidelink resources.
  • Tx periodic data transmission
  • the user equipment 100 has been authorized to use direct communication services like Proximity Services (ProSe) device-to-device (D2D) or vehicle-to-everything (V2X) is required to receive and monitor data packets being transmitted on the sidelink resource 311 from other user equipments such as the user equipment 200. Based on decoding sidelink control information using the at least one sidelink resource 311 of the user equipment 200, the user equipment 100 acquires knowledge about resource usage and reservation details of next transmissions.
  • direct communication services like Proximity Services (ProSe) device-to-device (D2D) or vehicle-to-everything (V2X) is required to receive and monitor data packets being transmitted on the sidelink resource 311 from other user equipments such as the user equipment 200.
  • ProSe Proximity Services
  • D2D device-to-device
  • V2X vehicle-to-everything
  • the process 321 Upon arrival of a data packet such as a process 321, the process 321 triggers the user equipment 100 to start plurality of pre-emption processes 320 by transmitting the pre-emption signals 322, 323, 324, and 325 for booking multiple sidelink nTTI or sTTI resources such as the second sidelink resources 332, 333, 334, and 335 that are required for transmitting the data packet TB.
  • a number of pre-emption processes 320 can be equal to a number of the second sidelink resource 332, 333, 334, and 335 for sending nTTI or sTTI data TB’s initial transmission and all associated repetitions/re-transmissions.
  • the user equipment 100 may reserve the same frequency resources in current TB transmissions 330 for subsequent TB transmissions 340 in a next X ms.
  • the user equipment 100 may repeat the same reservation process 350 for the following X ms and so on.
  • the user equipment 100 provides a resource pre-emption and reservation mechanism for sidelink data transport blocks (TBs) transmissions in 5th generation new radio (5G-NR) system to reduce or even prevent transmitting (Tx) collisions from multiple transmitting UEs.
  • TBs sidelink data transport blocks
  • 5G-NR 5th generation new radio
  • FIG. 3 illustrates that, in some embodiments, details of a sidelink resource pool 400 for nTTI or sTTI transmission is illustrated along with illustration of resource bookings during the pre-emption phase and resource reservation during data Tx phase.
  • the sidelink resource pool 400 such as a nTTI or sTTI resource pool is divided into multiple resource units 401 for nTTI or sTTI transmissions and each nTTI or sTTI resource unit includes a guard period (GP) /automatic gain control (AGC) region 402 which may be one symbol length, a control region 403 for transmitting a physical sidelink control channel (PSCCH) carrying sidelink control information (SCI) , and a data region 404 which can be used for at least one of transmitting the pre-emption signals 406 and transmitting a physical sidelink shared channel (PSSCH) for transmitting the sidelink data TBs.
  • the data region 404 can be of at least 3 symbols in length.
  • a pre-emption process involves determining a nTTI or sTTI resource unit is not being used by the user equipment 200 and transmitting a-pair of pre-emption signals to indicate the user equipment 200 intention of using a frequency resource unit after a certain time offset.
  • determining available nTTI or sTTI resources within data packet arrival interval is performed by the processor 104.
  • the user equipment 100 Based on past monitoring and reading of nTTI or sTTI control and scheduling information in the process 310, the user equipment 100 makes an initial identification of all nTTI or sTTI resource units 405 that has been already reserved for transmission in the current data packet arrival interval X ms in the processes 320 and 330.
  • the processor 104 of the user equipment 100 performs sensing of GP/AGC symbol of the GP/AGC region 402 and/or reading of PSCCH of the control region 403 to further determine a true availability of the first sidelink resource for transmitting the pre-emption signals 406. If an empty/unused nTTI or sTTI resource unit is found, the user equipment 100 may select the found resource unit and use the found resource unit for sending a pair of the pre-emption signals 406 in the data region 404 of the first sidelink resource.
  • Resource booking of pre-emption process is performed by the processor 104. Random selection with equal probability of two symbols out of total number of symbols in the data region 404 for sending the pair of pre-emption signals 406. Out of the pair of pre-emption signals 406 in the pre-emption process, each signal of the pre-emption signals 406 may be 1 symbol in length and holds identical information as carried by another signal of the pre-emption signals 406.
  • the processor 104 is further configured to transmit an information content in the pre-emption processes.
  • the information content may at least include a time offset parameter indicating a time gap 407, which could be in terms of number of nTTI or sTTI resource units or number of milliseconds, to an intended nTTI or sTTI resource unit 408 for booking, a ProSe per packet priority (PPPP) level, a user equipment source identity (ID) , and/or a destination ID.
  • PPPP ProSe per packet priority
  • ID user equipment source identity
  • the user equipment 100 repeats the same processes until all pre-emption processes are completed.
  • nTTI or sTTI data TB transmission and reservation of next resources are performed by the processor 104.
  • the user equipment 100 uses the booked resource units 408 such as the second sidelink resources 332, 333, 334, 335 in FIG. 2 for transmitting the nTTI or sTTI data packet TB arrived from an upper layer such as a medium access control (MAC) layer and at the same time reserves the same frequency resources X ms later in a process 409 for transmitting next data packet TB from the upper layer.
  • Reservation of the process 409 is performed by indicating the time offset to a next reserved frequency resource in the SCI transmitted in the PSCCH.
  • FIG. 4 to FIG. 6 illustrate that, in some embodiments, different scenarios of pair of pre-emption signals are transmitted by different UEs such as the first user equipment 100 and the second user equipment 200 in the same data region of a nTTI or sTTI resource unit.
  • FIG. 4 illustrates that, in some embodiments, the first user equipment 100 transmits pre-emption signal pair in symbol 512 and 514, and the second user equipment 200 transmits pre-emption signal pair in symbol 511 and 513. Since pre-emption signal pairs of the first user equipment 100 and the second user equipment 200 are not overlapped in the data region of the first sidelink resource, the first user equipment 100 and the second user equipment 200 would be able to listen to each other’s pre-emption indications.
  • pre-emption process is considered successful for both of the first user equipment 100 and the second user equipment 200.
  • FIG. 5 illustrates that, in some embodiments, the first user equipment 100 transmits pre-emption signal pair in symbol 522 and 524, and the second user equipment 200 transmits pre-emption signal pair in symbol 521 and 523.
  • Both of the first user equipment 100 and the second user equipment 200 transmit pre-emption signal pairs in different data region symbols of the first sidelink resource and detect having both indicated the same time offset of Y ms.
  • contention resolution would be necessary to avoid data packet transmission collision between the first user equipment 100 and the second user equipment 200.
  • One of the following two contention resolution schemes could be used.
  • both of the first user equipment 100 and the second user equipment 200 independently and randomly choose with equal probability whether or not continue to use the indicated frequency resource unit after Y ms, or abandon the indicated resource and restart the same pre-emption process in a different empty nTTI or sTTI resource.
  • contention resolution scheme 2 when PPPP level of the current data packet is also included as part of pre-emption indication, the user equipment with lower PPPP level, the first user equipment 100 in this case, would abandon the indicated resource and restart the same pre-emption process in a different empty nTTI or sTTI resource.
  • FIG. 6 illustrates that, in some embodiments, the first user equipment 100 transmits pre-emption signal pair in symbol 532 and 533, and the second user equipment 200 transmits pre-emption signal pair in symbol 531 and 532.
  • both of the first user equipment 100 and the second user equipment 200 have an overlapping symbol in 532 in the data region of the first sidelink resource but still able to retrieve each other’s pre-emption signal in 531 for the first user equipment 100 and pre-emption signal in 533 for the second user equipment 200. Since indicated time offsets are not the same, there would be no conflict or collision in transmitting data packets. Therefore, resource pre-emption process is considered successful for both of the first user equipment 100 and the second user equipment 200.
  • the memories 102 and 202 each may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and/or other storage device.
  • the processors 104 and 204 each may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and/or data processing device.
  • the processors 104 and 204 each may also include baseband circuitry to process radio frequency signals.
  • 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 memories 102 and 202 and executed by processors 104 and 204.
  • the memories 102 and 202 can be implemented within the processors 104 and 204 or external to the processors 104 and 204 in which case those can be communicatively coupled to the processors 104 and 204 via various means as is known in the art.
  • FIG. 7 illustrates that, in some embodiments, the communication between the user equipment 100 and the user equipment 200 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 LTE sidelink technology developed under 3rd generation partnership project (3GPP) and/or 5G-NR radio access technology.
  • 3GPP 3rd generation partnership project
  • 5G-NR radio access technology 3rd generation partnership project
  • FIG. 8 illustrate a method 600 of wireless communication according to the present disclosure, from an aspect of operation of the user equipment 100 for transmitting signals.
  • the method 600 includes: at block 602, performing a wireless communication directly over a sidelink interface to at least one second user equipment 200, at block 604, monitoring and reading at least one sidelink resource used by the at least one second user equipment 200, at block 606, determining a plurality of first sidelink resources available for transmitting a plurality of pre-emption signals and a plurality of second sidelink resources available for transmitting a plurality of sidelink data transport blocks (TBs) , at block 608, performing a plurality of pre-emption processes by transmitting the pre-emption signals for booking the second sidelink resources, and at block 610, transmitting the sidelink data TBs using booked second sidelink resources and reserving a plurality of same frequency resources using the second sidelink resources in a current transmission for a subsequent transmission.
  • TBs sidelink data transport blocks
  • the method 600 further includes sensing the GP/AGC region of the first sidelink resource and/or reading the control region of the first sidelink resource to determine a true availability of the first sidelink resource for transmitting the pre-emption signals.
  • the method 600 further includes transmitting the pre-emption signals in the data region of the first sidelink resource.
  • the method 600 further includes performing a random selection with equal probability of two symbols out of a total number of symbols in the data region of the first sidelink resource for transmitting a pair of pre-emption signals.
  • the method 600 further includes transmitting an information content in the pre-emption processes.
  • the information content includes a time offset parameter indicating a time gap in terms of a number of sidelink resources or a number of milliseconds for booking the second sidelink resources, a ProSe per packet priority (PPPP) level, a user equipment source identity, and/or a destination identity.
  • PPPP ProSe per packet priority
  • the method 600 includes reserving the same frequency resources by indicating a time offset in the SCI of the second sidelink resource.
  • the method further includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment 200, and detecting the second pre-emption signals on the first sidelink resources being not overlapped with the pre-emption signals.
  • the method 600 further includes detecting the second pre-emption signals having a time gap with the pre-emption signals in a time domain.
  • the method 600 includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment 200, detecting the pre-emption signals and the second pre-emption signals in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and independently and randomly choosing with equal probability with the at least one second user equipment 200 whether or not continue to use the second sidelink resources after the same time period, or abandon the second sidelink resources and restart a same pre-emption process in a different empty sidelink resource.
  • the method 600 includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment 200, detecting the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level greater than the first PPPP level in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, abandoning the second sidelink resources, and restarting a same pre-emption process in a different empty sidelink resource.
  • the method 600 includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment 200, detecting the pre-emption signals with a first PPPP level and the second pre-emption signals with a second PPPP level less than the first PPPP level in different data regions of the first sidelink resources, detecting the pre-emption signals and the second pre-emption signals having a same time offset in a time period, and continuing to use the second sidelink resources after the same time period.
  • the method 600 includes monitoring and reading a plurality of second pre-emption signals transmitted by the at least one second user equipment 200, detecting the second pre-emption signals on the first sidelink resources, detecting the second pre-emption signals having a time gap with the pre-emption signals in a time domain, detecting a part of the second pre-emption signals being overlapped with a part of the pre-emption signals, and detecting another part of the second pre-emption signals being not overlapped with another part of the pre-emption signals.
  • the method 600 includes transmitting the data TBs by an initial transmission and at least one re-transmission.
  • the method 600 further includes transmitting the data TBs and reserving the same frequency resources repeatedly.
  • the user equipment and the method of wireless communication of same provide a resource pre-emption and reservation mechanism for sidelink data transport blocks (TBs) transmissions in 5th generation new radio (5G-NR) system to reduce or even prevent transmitting (Tx) collisions from multiple transmitting UEs. Furthermore, in the embodiment, two contention resolution techniques are also given to resolve two UEs trying to pre-empt same sidelink resource for transmission.
  • the user equipment and the method of wireless communication of same in the embodiment also provide fast and reliable data transmission for NR-sidelink communication through resource pre-emption and reservation and/or contention resolution.
  • 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.
  • 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.
  • 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.
  • the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un équipement utilisateur qui comprend une mémoire et un processeur couplé à la mémoire. Le processeur est configuré pour effectuer une communication sans fil directement sur une interface de liaison latérale vers au moins un second équipement utilisateur, surveiller et lire au moins une ressource de liaison latérale utilisée par le au moins un second équipement utilisateur, déterminer une pluralité de premières ressources de liaison latérale disponibles pour transmettre une pluralité de signaux de préemption et une pluralité de secondes ressources de liaison latérale disponibles pour transmettre une pluralité de blocs de transport (TB) de données de liaison latérale, effectuer une pluralité de processus de préemption par transmission des signaux de préemption pour réserver les secondes ressources de liaison latérale, et transmettre les TB de données de liaison latérale à l'aide de secondes ressources de liaison latérale réservées et réserver une pluralité de mêmes ressources de fréquence à l'aide des secondes ressources de liaison latérale dans une transmission courante pour une transmission ultérieure.
PCT/CN2018/076881 2018-02-14 2018-02-14 Équipement utilisateur et son procédé de communication sans fil WO2019157739A1 (fr)

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PCT/CN2018/076881 WO2019157739A1 (fr) 2018-02-14 2018-02-14 Équipement utilisateur et son procédé de communication sans fil

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WO2021102002A1 (fr) * 2019-11-18 2021-05-27 Qualcomm Incorporated Réservation de ressources pour des transmissions de liaison latérale ultérieures par l'intermédiaire d'une communication d'informations de commande de liaison latérale initiale
WO2021098858A1 (fr) * 2019-11-20 2021-05-27 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Communication de liaison latérale à préemption de ressources
WO2021147770A1 (fr) * 2020-01-20 2021-07-29 维沃移动通信有限公司 Procédé et dispositif de transmission de données
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RU2801816C1 (ru) * 2019-09-30 2023-08-16 Гуандун Оппо Мобайл Телекоммьюникейшнс Корп., Лтд. Способ и устройство для передачи данных
WO2021102002A1 (fr) * 2019-11-18 2021-05-27 Qualcomm Incorporated Réservation de ressources pour des transmissions de liaison latérale ultérieures par l'intermédiaire d'une communication d'informations de commande de liaison latérale initiale
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US11871417B2 (en) 2020-02-25 2024-01-09 Qualcomm Incorporated Techniques for relaying resource reservation information on a sidelink
WO2021098100A1 (fr) * 2020-03-18 2021-05-27 Zte Corporation Procédé et dispositif d'économie d'énergie dans une communication sans fil à liaison latérale
WO2021248476A1 (fr) * 2020-06-12 2021-12-16 Nokia Shanghai Bell Co., Ltd. Communication de liaison latérale avec consommation d'énergie réduite
WO2022165734A1 (fr) * 2021-02-05 2022-08-11 Lenovo (Beijing) Limited Procédés et appareils pour une procédure de contrôle de préemption pour une transmission de liaison latérale

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