WO2024002245A1 - 由用户设备执行的方法以及用户设备 - Google Patents

由用户设备执行的方法以及用户设备 Download PDF

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Publication number
WO2024002245A1
WO2024002245A1 PCT/CN2023/103872 CN2023103872W WO2024002245A1 WO 2024002245 A1 WO2024002245 A1 WO 2024002245A1 CN 2023103872 W CN2023103872 W CN 2023103872W WO 2024002245 A1 WO2024002245 A1 WO 2024002245A1
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Prior art keywords
channel
symbol
time slot
transmission
resource
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PCT/CN2023/103872
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English (en)
French (fr)
Inventor
罗超
赵毅男
刘仁茂
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夏普株式会社
罗超
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Publication of WO2024002245A1 publication Critical patent/WO2024002245A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to a method executed by user equipment and user equipment.
  • SL sidelink, side link, or direct link, or direct link, or side link, or straight link for short
  • UEs User Equipment
  • direct communication
  • SL communication can include general D2D (device-to-device, device to device) communication, V2V (vehicle-to-vehicle, vehicle to vehicle) communication, V2X (vehicle-to-everything, vehicle to everything) communication, etc.
  • a series of issues need to be solved, such as the channel access mechanism; another example, the physical layer channel and/or Or the structure of the signal; another example, the physical layer process (such as synchronization process, another example, feedback and/or determination mechanism); another example, the allocation and/or management of resources; another example, coexistence with other systems.
  • Non-patent document 1 RP-152293, New WI proposal: Support for V2V services based on LTE sidelink, 3GPP TSG RAN Meeting#70
  • Non-patent document 2 RP-170798, New WID on 3GPP V2X Phase 2, 3GPP TSG RAN Meeting#75
  • Non-patent document 3 RP-170855, New WID on New Radio Access Technology, 3GPP TSG RAN Meeting#75
  • Non-patent document 4 RP-190766, New WID on 5G V2X with NR sidelink, 3GPP TSG RAN Meeting#83
  • Non-patent document 5 RP-201385, WID revision: NR sidelink enhancement, 3GPP TSG RAN Meeting#88e
  • Non-patent document 6 RP-213678, New WID on NR side link evolution, 3GPP TSG RAN Meeting#94e
  • the present invention provides a method performed by user equipment and user equipment, by excluding the detected power on resources reserved by other UEs in the power detection link of the channel access process. , which greatly reduces the probability that different SL UEs block each other during channel access, and improves the efficiency of SL communication in unlicensed spectrum.
  • a method performed by user equipment which is characterized in that it includes: determining reserved resources in a future time slot; and, before the start time of the time slot arrives, for an already
  • the SL transmission scheduled in the time slot executes a channel access process; wherein, in the channel access process, when power detection is performed, the power on the frequency resource corresponding to the reserved resource is excluded.
  • a user equipment including: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.
  • the present invention provides a method by excluding the detected power on resources reserved by other UEs in the power detection link of the channel access process, thereby greatly reducing the cost of channel access. At this time, the probability that different SLUEs block each other improves the efficiency of SL communication in unlicensed spectrum.
  • Figure 1 shows a flow chart corresponding to a method executed by user equipment according to Embodiment 1 of the present invention.
  • FIG. 2 shows a block diagram of a UE (User Equipment) involved in the present invention.
  • 5G or NR ("New Radio"), or 5G NR
  • 5G NR 5G NR
  • 3GPP 3rd Generation Partnership Project, 3rd Generation Partnership Project
  • 5G Advanced 5G Advanced
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as wireless communication systems after 5G, and 4G mobile communication systems before 5G such as LTE (Long Term Evolution, long-term evolution), LTE-Advanced, LTE-Advanced Pro, etc.
  • LTE Long Term Evolution, long-term evolution
  • LTE-Advanced Long Term Evolution-term evolution
  • LTE-Advanced Pro etc.
  • ⁇ "Higher layer(s), or upper layer(s) may refer to a given reference protocol layer or reference protocol sub-layer (such as the physical layer) in a given protocol stack.
  • the "higher layer” can refer to the MAC (Medium Access Control, Media Access Control) layer, or the RLC (Radio Link Control, Radio Link Control Protocol) layer, or PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) ) layer, or PC5RRC (Radio Resource Control, Radio Resource Control) layer, or PC5-S layer, or RRC layer, or V2X (Vehicle-to-everything, vehicle to everything) layer, or application layer, or V2X application layer, etc.
  • the reference protocol layer is the physical layer.
  • Configure can refer to a protocol layer (such as RRC layer) entity in a communication node (such as UE, or eNB, or gNB) providing configuration information to another protocol layer (such as physical layer) entity.
  • a protocol layer such as RRC layer
  • a communication node such as UE, or eNB, or gNB
  • another protocol layer such as physical layer
  • Configuration may refer to one communication node providing configuration information to another communication node (for example, transmitting RRC signaling from the base station to the UE, which contains the configuration information; or transmitting PC5-RRC signaling from UE-A to UE-B). command, which contains the configuration information).
  • Configuration may include “pre-configure”. Among them, “preconfiguration” may refer to presetting the corresponding configuration information in a specific storage location in the UE, or placing the relevant configuration information in a specific storage location in the UE. The corresponding configuration information is preset in a specific storage location that the UE can access.
  • ⁇ "Symbol refers to OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbol.
  • ⁇ It can represent the number of time slots in each subframe.
  • ⁇ It can represent the number of symbols in each time slot.
  • ⁇ A resource can correspond to one or more of the following:
  • the starting symbol of the resource For example, the starting symbol of the resource; another example, the starting time slot of the resource; another example, the number of symbols occupied by the resource; another example, the number of time slots occupied by the resource.
  • the starting sub-channel of the resource another example, the starting RB (resource block, resource block) of the resource; another example, the starting sub-carrier of the resource; another example, the sub-carrier occupied by the resource
  • the resource is The corresponding cyclic shift (cyclic shift) value or the corresponding cyclic shift index; another example is the corresponding cyclic shift pair (cyclic shift pair) value or the corresponding cyclic shift pair index of the resource.
  • one "layer” may refer to a MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) layer.
  • ⁇ "RB can refer to VRB (virtual resource block, virtual resource block), or PRB (physical resource block, physical resource block), or CRB (common resource block, public resource block), or IRB (Interlaced Resource Block, interlaced resource) piece).
  • ⁇ "Number and "index” are interchangeable.
  • the number of an RB may also be called the index of the RB.
  • “numbering one RB to 0” can also be expressed as "indexing one RB to 0".
  • the numbering of elements in a sequence can start from 0.
  • the first RB of an RB set may be called RB 0 of the RB set.
  • ⁇ An object (such as a subcarrier, a time slot, a cyclic shift, etc.) can be represented by its index, for example, a CRB numbered 0 can be called CRB 0.
  • the number of objects may be one or more.
  • the “transmission(s)” may correspond to one transmission, or multiple transmissions.
  • ⁇ (x 1 , x 2 ) can represent the offset between x 1 and x 2 (offset between x 1 and x 2 ), where the x 1 and the x 2 can be two parameters that can be compared (or variable), or two possible values of a parameter (or variable) (for example, the x 1 and the x 2 can be two time slots, or two subframes, or two frames, or two sub carrier, or two RBs, or two sub-channels, etc.).
  • ⁇ (x 1 , x 2 ) can be equal to x 2 -x 1 .
  • ⁇ (x 1 , x 2 ) can be equal to
  • offset between x 1 and x 2 can also be called the offset of x 2 with respect to x 1 (offset of x 2 with respect to x 1 , or offset of x 2 relative to x 1 ).
  • the offset between x 1 and x 2 can also be called the offset from x 1 to x 2 (offsetfrom x 1 to x 2 ).
  • the offset between two subcarriers may be the offset between the center frequencies of the two subcarriers.
  • ⁇ Modulo Operation can be defined as r ⁇ a mod N, where,
  • ⁇ r is the remainder (remainder).
  • ⁇ a N ⁇ q+r, where, q can be called the integer quotient of a and N.
  • ⁇ The unit of microseconds can be recorded as ⁇ s or us.
  • a transmission that has not yet begun execution (eg, before the expected start time of the transmission is reached) may be called an "intended transmission”.
  • sensing slot duration may represent the duration of the corresponding sensing slot, or the sensing slot itself.
  • a "sensing slot” may represent the sensing slot itself, or the duration of the sensing slot.
  • power detection power detection
  • energy detection energy detection
  • energy detection threshold energy detection threshold
  • SL time slot can refer to a time slot configured or pre-configured with SL resources.
  • the "SL resources” may not include resources used for synchronization processes (such as those used to transmit S-SS/PSBCH (S-SS/Physical Sidelink Broadcast CHannel, or Sidelink-Synchronization Signal/Physical Sidelink Broadcast CHannel) blocks resources), or include resources for synchronization processes.
  • SL time slot can refer to a time slot belonging to a certain SL resource pool.
  • the set of SL symbols in an SL slot can be recorded as in respectively represent the index of the corresponding symbol in the time slot, where in is the index of the first SL symbol in the slot (for example, configured through the parameter sl-StartSymbol-r16), is the number of SL symbols in the time slot (for example, configured through the parameter sl-LengthSymbols-r16).
  • PSSCH Physical Sidelink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • the "first SL symbol” (or (referred to as the "first symbol") may be the symbol in the SL time slot (T SL,0 ) corresponding to the resource allocation. or symbol
  • the resource allocation contains the corresponding PSCCH and/or "duplicated symbols" (i.e.
  • the “first SL symbol” may refer to the symbol
  • the “first SL symbol” when it is not explicitly stated that the resource allocation contains "repeated symbols" in the corresponding PSCCH and/or PSSCH, the “first SL symbol” may refer to the symbol
  • the "first SL symbol” when performing physical resource mapping for the PSCCH and/or the PSSCH transmission (for example, when placing the PSCCH/PSSCH transmission, or the corresponding PSCCH transmission, or the corresponding PSSCH transmission in a symbol Copy the resource element in to the symbol before middle), or Before performing physical resource mapping for the corresponding PSCCH transmission and/or PSSCH transmission in the PSCCH/PSSCH transmission, the "first SL symbol” may refer to a symbol
  • the CPE CyclicPrefixExtension, cyclic prefix extension
  • the "first SL symbol” when determining the resources configured or
  • the "first SL symbol" (or “first symbol") of a PSCCH/PSSCH transmission refers to the resource allocation corresponding to the transmission.
  • the "first SL symbol” in .
  • ⁇ “A subcarrier is in an SLBWP (or RB set, or guard band)” refers to one of the following:
  • the center frequency of the subcarrier is in the bandwidth of the SL BWP (or RB set, or guard band).
  • the bandwidth of the subcarrier is within the bandwidth of the SLBWP (or RB set, or guard band).
  • the subcarrier is a subcarrier in the SL BWP (or RB set, or guard band).
  • ⁇ "A subcarrier is not in a SL BWP (or RB set, or guard band) refers to one of the following:
  • the center frequency of the subcarrier is not in the SL BWP (or RB set, or guard band).
  • the bandwidth of the subcarrier is not in the bandwidth of the SL BWP (or RB set, or guard band).
  • the subcarrier is not a subcarrier in the SL BWP (or RB set, or guard band).
  • ⁇ An S-SS/PSBCH block in a SL BWP (or RB set, or guard band)" can refer to one of the following:
  • the bandwidth of the S-SS/PSBCH block is within the bandwidth of the SL BWP (or RB set, or guard band).
  • ⁇ All subcarriers of the S-SS/PSBCH block are in the SL BWP (or RB set, or guard band). For example, "one subcarrier in one SL BWP (or RB set, or guard band)" can be applied to each subcarrier respectively.
  • ⁇ All subcarriers of the S-SS/PSBCH block are subcarriers in the SL BWP (or RB set, or guard band).
  • ⁇ "An S-SS/PSBCH block is not in a SL BWP (or RB set, or guard band)" refers to one of the following:
  • any part of the bandwidth of the S-SS/PSBCH block is not in the bandwidth of the SL BWP (or RB set, or guard band).
  • ⁇ No subcarriers of the S-SS/PSBCH block are in the SL BWP (or RB set, or guard band).
  • the subcarrier is in the SL BWP (or RB set, or "Guard belt)" is not true.
  • Any subcarrier of the S-SS/PSBCH block is not a subcarrier in the SL BWP (or RB set, or guard band).
  • a "frame” (frame, also known as "radio frame", radio frame) can be a system frame (system frame) or a direct frame (direct frame).
  • Each subframe may contain time slots, for example,
  • the index of a timeslot in a subframe can be recorded as The index of a time slot in the frame can be recorded as in, can be equal to 10 ⁇ 2 ⁇ .
  • the time slot index in a frame number period can be recorded as in can be equal to (For example, 1024 ⁇ (10 ⁇ 2 ⁇ )).
  • 5G (or NR, New Radio) can work in licensed spectrum (such as 2010MHz-2025MHz), or in unlicensed spectrum (such as part or all of 5150MHz-5925MHz, or part or all of 5925-7125MHz, Another example is part or all of 5925-6425MHz).
  • a 5G-enabled communication node When working in unlicensed spectrum, a 5G-enabled communication node (or “node”, such as a base station, or a UE) can communicate with a “channel” (or “shared-spectrum channel”). Execute a “channel access process” (channel access procedure). Among them, one channel can correspond to a set consisting of several consecutive resource blocks (RBs). Operations performed on one or more shared spectrum channels may be referred to as “operations with shared spectrum channel access”. For comparison, operation on licensed spectrum can be called “operation without shared spectrum channel access" (operation without shared spectrum channel access).
  • a channel can correspond to a carrier (carrier), or a part of a carrier.
  • a carrier carrier
  • one channel can correspond to a 20MHz bandwidth carrier; another example, one channel can correspond to the lower frequency 20MHz of a 40MHz bandwidth carrier, and another channel can correspond to the higher frequency 20MHz of the same carrier.
  • a channel access procedure may be used to evaluate whether a channel can be used to perform one or more transmissions (alternatively referred to as "evaluating whether one or more transmissions can be performed on a channel"), where the evaluation operation may be referred to as CCA (Clear Channel Assessment, idle channel assessment).
  • CCA Cerar Channel Assessment, idle channel assessment
  • LBT Listen Before Talk
  • the status of a channel can be determined based on a "sensing" operation on the channel (for example, as a result or output of the channel access process).
  • the channel status "Idle” can indicate that the channel access is successful, or that the corresponding channel is available, or that one or more transmissions can be performed on the channel; for another example, the channel status "Busy” can indicate that the channel access fails. , or indicates that the corresponding channel is unavailable, or that no transmission can be performed on the channel).
  • sensing slot duration sensing slot durations
  • sensing slot duration additional sensing slot duration
  • N can be an integer greater than or equal to 0;
  • the period of time of length T f may start with a sensing time slot.
  • the corresponding channel cannot be accessed before the start time of an expected transmission (for example, before the first symbol corresponding to the transmission) (for example, the channel cannot be accessed because the status of the channel is "busy” ), it can be considered that a "channel access failure" has occurred, or, where applicable, an "LBT failure".
  • the transmission performed on the corresponding channel after performing the channel access procedure may be called “Channel Occupancy” (CO), and the corresponding duration may be called “Channel Occupancy Time” (COT).
  • COT can be shared between one or more communication nodes.
  • the time corresponding to the COT can include the time when the one or more communication nodes perform transmission on the corresponding channel, as well as the transmission between these transmissions.
  • the time corresponding to the transmission gap (for example, when the duration of the transmission gap is less than or equal to 25us).
  • Channel access procedures can be divided into multiple types based on usage, applicable scenarios, etc. For example, if the time spanned by the sensing time slot in which the sensing result is idle before transmission is performed is recorded as Then in "Channel Access Process Type 1", is random; in "channel access process type 2", is certain.
  • Channel access procedure type 1 can be used for a non-shared COT or a shared COT; channel access procedure type 2 can be used to perform channel access in a COT shared by other communication nodes.
  • Channel access process type 2 can be done according to The characteristics are divided into multiple subtypes, for example, one or more of the following:
  • ⁇ Channel access process type 2A where, or, or, This can apply to the interval between the corresponding transmission and the immediately preceding transmission (e.g. denoted ) satisfies certain conditions, for example, Another example, Another example, Another example,
  • ⁇ Channel access process type 2B where, or, or, or, or, This can be applied to the When certain conditions are met, for example, Another example, Another example, Another example, Another example, Another example, Another example, Another example, Another example, Another example,
  • ⁇ Channel access process type 2C in which the corresponding channel is not sensing (for example, this can correspond to ). This can be applied to the When certain conditions are met, for example, Another example,
  • a “multi-channel access procedure” may refer to one or more transmissions (e.g. , simultaneous One or more channel access procedures are executed (e.g., executed in parallel) for multiple transmissions.
  • the set CH sns may be equal to the set CH acc , or defined in other ways (for example, if no guard band is configured on the carrier where the channel in the set CH acc is located, the set CH sns may be equal to the carrier the set of all channels on).
  • a channel access procedure (for example, according to channel access procedure type 1) can be performed on each channel in the set CH sns , and it is determined according to the corresponding result whether the one or Multiple transmissions (for example, for each of the one or more transmissions, if the access results of all channels corresponding to the transmission are idle, the transmission may be performed).
  • one channel ch j may be selected (eg, uniformly and randomly selected) in the set CH sns and perform channel access procedure type 1 on it , while each other channel ch j in the set CH sns Channel access process type 2 (for example, channel access process type 2A, or channel access process type 2B, or channel access process type 2C) or another channel access process that is not channel access process type 1 is performed on the channel. , and determine whether the one or more transmissions can be performed based on the corresponding results.
  • Channel access process type 2 for example, channel access process type 2A, or channel access process type 2B, or channel access process type 2C
  • the set of available resource blocks in a channel can be called an "RB set" (RB set).
  • RB set RB set
  • a carrier for example, denoted as c
  • there may be used to separate the The guard bands of each RB set are, for example, recorded as Among them, for The lowest numbered CRB and the highest numbered CRB of gb j can be recorded as The number of RBs in gb j can be recorded as in can be equal to gb j can be used to separate RB set rs j and RB set rs j+1 .
  • a carrier with a bandwidth of 40MHz for a 15kHz SCS, there can be 216 consecutive RBs (for example, the CRB numbers are 0, 1, ..., 215), and the 216 RBs can Divided into 3 subsets, each corresponding to an RB set a protective tape and a RB set
  • the set composed of RB sets can be recorded as right There can be zero or one guard band between two adjacent RB sets (rs i and rs i+1 ).
  • the set of protective bands can be written as right If gb j is an empty set, it can be considered that the corresponding guard band does not exist. If right If gb j are all empty sets, it can be considered that there is no guard band between the RB sets of carrier c.
  • Can be configured in carrier c BWP (Bandwidth Part, bandwidth fragment), for example, respectively recorded as right bwp k can support RB sets, for example, respectively recorded as Among them, for is an element in the set RS C , and The lowest numbered CRB of bwp k (e.g. denoted as ) can be equal to The number of RBs in bwp k (for example, recorded as ) can be equal to described
  • the set composed of RB sets can be recorded as The set RS BWP may be equal to the set RS C , or equal to a subset of the set RS C .
  • PSD Power Spectral Density
  • OCB Olet Control Bandwidth
  • the maximum PSD cannot exceed 10dBm/MHz.
  • the bandwidth containing 99% of the transmission power must be greater than or equal to a specific percentage (such as 80%) of the nominal channel bandwidth (Nominal Channel Bandwidth).
  • Said restrictions, if any, may be established and enforced by regulatory authorities.
  • the restrictions (if any) on PSD and/or OCB can vary from country to country.
  • Configuring ⁇ for the same subcarrier spacing can be defined for different purposes (eg, different types of SL transmission). For example, configure ⁇ for the same subcarrier spacing, define one M INT value for S-SS/PSBCH transmission, and define another M INT value for PSCCH/PSSCH transmission and/or PSFCH transmission. For example, configure ⁇ for the same subcarrier spacing, define a M INT value for S-SS/PSBCH transmission, and do not define interleaving for PSCCH/PSSCH transmission and/or PSFCH transmission.
  • a set of one or more RBs occupied by a radio transmission may be associated with one or more interlaces and one or more RB sets.
  • the RBs in an interlace may be called IRBs.
  • IRBs For example, in bwp k , the numbers of IRBs in interleaved int m can be recorded in order from small to large in frequency as The corresponding CRB numbers can be recorded as The corresponding PRB numbers can be recorded as
  • IRB number and the corresponding CRB number The relationship can be recorded as in can be defined as:
  • IRB number and the corresponding PRB number The relationship can be recorded as in can be defined as:
  • I MAP ⁇ int 0 , int 1 ⁇ , where the CRB corresponding to int 0 is ⁇ 10, 15, 20,... ⁇ , and the CRB corresponding to int 1 is ⁇ 11, 16, 21 ,... ⁇
  • RS MAP ⁇ rs 0 , rs 1 ⁇ , where the CRB corresponding to rs 0 is ⁇ 10, 11, 12,..., 59 ⁇ , and the CRB corresponding to rs 1 is ⁇ 66, 67, 68 ,...,115 ⁇ , then
  • the definition of can be different.
  • ⁇ The unit can be seconds.
  • ⁇ The unit can be seconds.
  • ⁇ p represents the corresponding antenna port.
  • ⁇ is the corresponding subcarrier spacing configuration.
  • ⁇ Can be called CPE length (or CPE duration).
  • ⁇ The unit can be seconds.
  • the CPE length It can be defined in one of the following ways:
  • ⁇ can be equal to the symbol l 0 before symbols (the The sum of the lengths of symbol(s)immediately preceding symbol l 0 ).
  • the " “symbol” corresponds to the symbol immediately preceding symbol l 0 (the symbol immediately precedes symbol l 0 , for example, it is recorded as symbol l 0, m1 ).
  • the " symbols” corresponds to the previous symbol of the symbol l 0 (for example, marked as symbol l 0, m1 ) and the previous symbol of said symbol l 0, m1 (for example, marked as symbol l 0, m2 ).
  • ⁇ Can be a predefined or configured or preconfigured value. For example,
  • ⁇ It can be a value indicated by DCI (Downlink Control Information) or SCI (Sidelink Control Information), where the indicated value can be an element in a predefined or configured or preconfigured set.
  • DCI Downlink Control Information
  • SCI Seglink Control Information
  • ⁇ can be equal to in, can be equal to (or, ), or a predefined or configured or preconfigured symbol index in a subframe; Can be equal to ⁇ , or a predefined or configured or preconfigured subcarrier spacing configuration.
  • ⁇ can be equal to in, can be equal to (or, ), or a predefined or configured or preconfigured symbol index in a subframe; Can be equal to ⁇ , or a predefined or configured or preconfigured subcarrier spacing configuration.
  • ⁇ can be equal to the symbol l 0 before
  • an offset value related to channel access and/or timing advance for example, denoted as
  • minus or equal to minus For example, can be defined as (or, ), or defined as or defined as in,
  • ⁇ Can be a predefined or configured or preconfigured value. For example,
  • ⁇ Can be a value indicated by DCI or SCI, where the indicated The value can be a predefined or configured or an element of a preconfigured collection.
  • ⁇ can be satisfied (or, ) is the largest integer.
  • ⁇ can be satisfied (or, ) is the largest integer.
  • ⁇ can be satisfied the largest integer.
  • ⁇ can be satisfied the largest integer.
  • ⁇ The unit can be seconds.
  • ⁇ With related. For example, for Each value of corresponds to a unique value.
  • ⁇ Can be a predefined or configured or preconfigured value.
  • ⁇ Can be a value indicated by DCI or SCI, where the indicated value can be an element of a predefined or configured or preconfigured set.
  • ⁇ A given value can be indicated by a configured value or a value indicated in DCI or a value indicated in SCI value (e.g. ) and a given value (e.g. ), wherein the pair may be an element of a predefined or configured or preconfigured set.
  • ⁇ Can be related to ⁇ .
  • ⁇ Can be configured or indicated to be equal to (or, ),Correspondingly,
  • a dynamic permission scheduled transfer is a predefined value independent of ⁇ , or a configured or preconfigured value.
  • a configuration permission schedule for the transmission of a configuration permission schedule,
  • said transmission of all possible value (also known as “the transmission all allowed The set of values ”) can be recorded as Among them, the set The largest element in can be recorded as
  • transmission can correspond to an upper bound (e.g. called the transmission The "CPE upper bound", for example, is recorded as ).
  • CPE upper bound for example, is recorded as .
  • Another example, can be a larger than the set The value of any element in .
  • It can be related to l 0 , or it can be independent of l 0 .
  • the definition of can be different. For example, for a dynamic permission scheduled transfer, (or, ). For another example, for the transmission of a configuration permission schedule, (or,
  • Embodiment 1 of the present invention The method executed by the user equipment according to Embodiment 1 of the present invention will be described below with reference to FIG. 1 .
  • Figure 1 shows a flow chart corresponding to a method executed by user equipment according to Embodiment 1 of the present invention.
  • the steps performed by the user equipment UE include: step S101 and step S103.
  • reserved resources are determined. For example, in the time slot before (e.g., including the timeslot As another example, excluding the time slot ), determine the time slot in the resource pool rp u reserved resources in , where the time slot can be a later than the time slot time slot; i ⁇ 0, 1,..., T′ max -1 ⁇ , phase Accordingly, the time slot set of the resource pool rp u within a frame number period can be recorded as
  • the set of reserved resources can be recorded as The number of reserved resources included can be recorded as in, Can be an integer greater than or equal to 0. Specifically, if but can be recorded as like but Can be an empty set right resource Can correspond to the time slot subchannel started consecutive sub-channels (for example, denoted as sub-channel set in Can be an integer greater than or equal to 1. the collection Any two reserved resources in may overlap (for example, overlap on at least one sub-channel) or may not overlap. the collection The union of can be recorded as
  • the set composed of all RB sets in the resource pool rp u can be recorded as in Can be an integer greater than or equal to 1.
  • Each RB set in the set RS RP, u may respectively correspond to a channel (i.e., a "channel" on which channel access can be performed), for example, for The corresponding channel can be recorded as The set RS RP, the channel set corresponding to u can be recorded as
  • the time slot It may be a time slot in the resource pool rp u , or it may not be a time slot in the resource pool rp u .
  • the time slot and the time slot The time slot offset between Wherein, D may be a predefined or configured or preconfigured value, or determined by one or more predefined, configured or preconfigured values.
  • the reserved resources Can be in time slot middle
  • the detected SCI indicates a resource, where m j ⁇ ⁇ 0, 1, ..., T′ max -1 ⁇ , and the time slot earlier than the time slot Or, the time slot no later than the stated time slot
  • the SCI may refer to the time slot
  • the first-stage SCI carried in a PSCCH transmission detected in (for example, the corresponding SCI format is SCI format 1-A), and/or the second-stage SCI associated with the first-stage SCI.
  • the reserved resources Can be one of one or more resources indicated in the SCI. For example, it may be indicated by the "Time resource assignment" (Time resource assignment) field and/or the "Frequency resource assignment” (Frequency resource assignment) field and/or the "Resource reservation period” field in the SCI.
  • the one or more resources may be indicated by the "Time resource assignment" (Time resource assignment) field and/or the "Frequency resource assignment” (Frequency resource assignment) field and/or the "Resource
  • a channel access procedure is performed. For example, in order to determine whether an SL transmission can be performed in a time slot in the resource pool rpu , a channel access procedure is performed a period of time before the start time of the time slot.
  • the channel access procedure may be used for one channel.
  • the channel access procedure is performed (eg, using channel access procedure type 1).
  • the channel access process may be a "multi-channel access process". For example, Correspondingly, a multi-channel access procedure is performed on the channels in the set CH RP,u .
  • the sensing operation eg, power detection and/or power comparison
  • the sensing operation may be related to the reserved resources determined in step S101.
  • Frequency exclusion (or frequency resource exclusion) may be performed in the power detection.
  • the "frequency exclusion” refers to determining the channel When the detected power X is detected , the power on the frequency corresponding to one or more resources is excluded (the frequency where two or more resources overlap is only excluded once).
  • the one or more resources may be defined in one of the following ways:
  • the first resource reservation time interval can be associated with the timeslot related. For example,
  • ⁇ can be equal to in
  • ⁇ can be equal to the time slot starting time.
  • ⁇ can be equal to the time slot The starting time of the first symbol.
  • ⁇ can be equal to the time slot The first SL symbol (i.e. the symbol ) starting time.
  • ⁇ can be equal to the time slot The second SL symbol (i.e. the symbol ) starting time.
  • ⁇ equal to the time slot The starting time of the first SL symbol used for PSCCH/PSSCH transmission.
  • ⁇ equal to the time slot The starting time of the second SL symbol used for PSCCH/PSSCH transmission.
  • ⁇ Can be a predefined or configured or preconfigured value. For example,
  • ⁇ can be equal to the time slot
  • the first symbol of corresponds to the CPE upper bound.
  • ⁇ can be equal to the time slot The CPE upper bound corresponding to the first SL symbol.
  • ⁇ can be equal to the time slot
  • the second SL symbol corresponds to the CPE upper bound.
  • ⁇ can be equal to the time slot end time.
  • ⁇ can be equal to the time slot The end time of the last symbol.
  • ⁇ can be equal to the time slot The end time of the penultimate symbol.
  • ⁇ can be equal to the time slot The end time of the last SL symbol.
  • ⁇ can be equal to the time slot The end time of the penultimate SL symbol.
  • ⁇ can be equal to the time slot The end time of the last SL symbol used for PSCCH/PSSCH transmission.
  • ⁇ can be equal to the time slot The end time of the penultimate SL symbol used for PSCCH/PSSCH transmission.
  • the power detection threshold Xthresh may be related to the reserved resources determined in step S101, or may be independent of the reserved resources determined in step S101. For example, X thresh ⁇ X i, Thresh_max ; another example, X thresh ⁇ X Thresh_max .
  • X i, Thresh_max can be equal to where BW i, excluded and The units are the same (for example, they are all MHz), BW i, excluded can be the sum of the bandwidths corresponding to all excluded frequency resources in the "frequency exclusion" (only the frequencies where two or more resources overlap are calculated once); can be the channel
  • the bandwidth, X Thresh_max can correspond to the channel in the sensing operation
  • the maximum power detection threshold when performing Frequency Exclusion e.g. X Thresh_max can be defined by one or more of the following:
  • a maximum power detection threshold is configured (for example, configured through the parameter maxEnergyDetectionThreshold), then the maximum power detection threshold configured by X Thresh_max .
  • a power detection threshold offset is configured (for example, configured through the parameter energyDetectionThresholdOffset)
  • the default power detection threshold X′ Thresh_max is adjusted according to the configured offset value, and X Thresh_max is equal to the adjusted X′ Thresh_max .
  • X Thresh_max X′ Thresh_max .
  • T A 10dB
  • P H 23dBm
  • P TX can be set to the UE in the channel the maximum output power, or set to the UE in the channel The maximum value of the maximum output power (when the value of the maximum output power corresponds to an interval),
  • the default power detection threshold X′ Thresh_max can be determined in one or more of the following ways:
  • "reserved resources" can be determined for any time slot in which SL resources are reserved or configured or pre-configured, and are not limited to time slots in a resource pool.
  • the gap determines the "reserved resources”.
  • a "reserved resource” may be a resource reserved by other UEs through SCI, or a configured or preconfigured resource (for example, a resource configured or preconfigured for S-SS/PSBCH transmission or reception; another example , resources configured or preconfigured for the transmission or reception of PSFCH), the first resource reservation time interval may include symbols corresponding to the "reserved resources", and, optionally, the "reserved resources” ” corresponds to the CPE upper bound of the first symbol.
  • the present invention provides a method that greatly reduces the power of the resources reserved by other UEs that have been detected in the power detection link of the channel access process.
  • the probability that different SL UEs block each other improves the efficiency of SL communication in unlicensed spectrum.
  • FIG. 2 is used to illustrate a user equipment that can execute the method performed by the user equipment described in detail above as a modified example of the present invention.
  • FIG. 2 is a block diagram showing user equipment UE according to the present invention.
  • the user equipment UE20 includes a processor 201 and a memory 202.
  • the processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 202 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory.
  • Memory 202 stores program instructions. When this instruction is executed by the processor 201, it can execute the above method executed by the user equipment as described in detail in the present invention.
  • the network nodes and user equipment shown above can include more modules, for example, they can also include base stations, AMF (Access and Mobility Management Function), UPF (Access and Mobility Management Function) that can be developed or will be developed in the future.
  • AMF Access and Mobility Management Function
  • UPF Access and Mobility Management Function
  • User Plane Function MME (Mobility Management Entity, Mobile Management Entity), S-GW (Serving Gateway, Service Gateway) or UE module, etc.
  • a multiplicative term another example is moving a term from the left to the right of an equation or inequality after changing its sign, another example is moving a term from the right to the left of an equation or inequality after changing its sign, etc.;
  • Simplification mathematical expressions, mathematical equations, or mathematical inequalities before and after transformation or rewriting can be considered equivalent.
  • various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing processor, application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), etc. wait.
  • DSP digital signal processing
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD programmable logic device
  • base station may refer to a mobile communication data and/or control switching center with a certain transmit power and a certain coverage area, including, for example, resource allocation and scheduling, data reception and transmission and other functions.
  • User equipment may refer to user mobile terminals, including, for example, mobile phones, laptops and other terminal equipment that can conduct wireless communication with base stations or micro base stations.
  • embodiments of the invention disclosed herein may be implemented on a computer program product.
  • the computer program product is a product that has a computer-readable medium with computer program logic encoded on the computer-readable medium, and when executed on a computing device, the computer program logic provides relevant operations to implement The above technical solution of the present invention.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in embodiments of the invention.
  • Such arrangements of the invention are typically provided as software, code and/or other data structures disposed or encoded on a computer readable medium, such as an optical medium (eg, a CD-ROM), a floppy or hard disk, or the like, or as one or more Other media for firmware or microcode on a ROM or RAM or PROM chip, or downloadable software images, shared databases, etc. in one or more modules.
  • Software or firmware or such configuration may be installed on the computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.
  • each functional module or each feature of the base station equipment and terminal equipment used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits.
  • Circuitry designed to perform the various functions described in this specification may include a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) or general-purpose integrated circuit, field-programmable gate array (FPGA) or other Programmed logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above.
  • General-purpose processors can be microprocessors processor, or the processor may be an existing processor, controller, microcontroller or state machine.
  • the above-mentioned general processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit.
  • the present invention can also use an integrated circuit obtained by utilizing the advanced technology.

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Abstract

本发明提出了一种由用户设备执行的方法以及用户设备。由用户设备执行的方法包括：确定在一个未来的时隙中的预留资源；以及，在所述时隙的起始时间到达之前，为一个已调度在所述时隙中的SL传输执行信道接入流程；其中，在所述信道接入流程中，在执行功率检测时，排除所述预留资源对应的频率资源上的功率。

Description

由用户设备执行的方法以及用户设备 技术领域
本发明涉及一种由用户设备执行的方法以及用户设备。
背景技术
在无线通信系统中，UE(User Equipment，用户设备)之间可以进行SL(sidelink，侧行链路，或者称为直行链路，或者称为直通链路，或简称侧行，或者简称直行，或者简称直通)通信。SL通信可以包括一般的D2D(device-to-device，设备到设备)通信，V2V(vehicle-to-vehicle，车到车)通信，V2X(vehicle-to-everything，车到万物)通信等。
为了支持在授权频谱(licensed spectrum)和/或非授权频谱(unlicensed spectrum)上的SL通信，需要解决一系列的问题，例如，信道接入(channel access)机制；又如，物理层信道和/或信号的结构；又如，物理层流程(例如同步流程，又如反馈和/或确定机制)；又如，资源的分配和/或管理；又如，与其他系统的共存。
在先技术文献
非专利文献
非专利文献1：RP-152293，New WI proposal：Support for V2V services based on LTE sidelink，3GPP TSG RAN Meeting#70
非专利文献2：RP-170798，New WID on 3GPP V2X Phase 2，3GPP TSG RAN Meeting#75
非专利文献3：RP-170855，New WID on New Radio Access Technology，3GPP TSG RAN Meeting#75
非专利文献4：RP-190766，New WID on 5G V2X with NR sidelink，3GPP TSG RAN Meeting#83
非专利文献5：RP-201385，WID revision：NR sidelink enhancement，3GPP TSG RAN Meeting#88e
非专利文献6：RP-213678，New WID on NR sidelink evolution，3GPP TSG RAN Meeting#94e
发明内容
为了解决上述问题中的至少一部分，本发明提供了一种由用户设备执行的方法以及用户设备，通过在信道接入流程的功率检测环节中排除已检测到的其他UE预留的资源上的功率，极大降低了在信道接入时不同SL UE之间互相阻塞对方的概率，提高了在非授权频谱中SL通信的效率。
根据本发明，提出了一种由用户设备执行的方法，其特征在于包括：确定在一个未来的时隙中的预留资源；以及，在所述时隙的起始时间到达之前，为一个已调度在所述时隙中的SL传输执行信道接入流程；其中，在所述信道接入流程中，在执行功率检测时，排除所述预留资源对应的频率资源上的功率。
此外，根据本发明，提出了一种用户设备，包括：处理器；以及存储器，存储有指令，其中，所述指令在由所述处理器运行时执行上述的方法。
因此，本发明提供了一种方法，通过在信道接入流程的功率检测环节中排除已检测到的其他UE预留的资源上的功率，极大降低了在信道接入 时不同SLUE之间互相阻塞对方的概率，提高了在非授权频谱中SL通信的效率。
附图说明
通过下文结合附图的详细描述，本发明的上述和其他特征将会变得更加明显，其中：
图1示出了根据本发明的实施例一的由用户设备执行的方法对应的流程图。
图2示出了本发明所涉及的UE(User Equipment，用户设备)的框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
下文以3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)制定的5G(或者称为NR(“New Radio”)，或者称为5G NR)无线通信系统规范及其后续的演进版本(例如，5G Advanced)作为示例应用环境，具体描述了根据本发明的多个实施方式。然而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其他的无线通信系统，例如5G之后的无线通信系统，又如5G之前的4G移动通信系统如LTE(Long Term Evolution，长期演进)、LTE-Advanced、LTE-Advanced Pro等。
本发明给出的术语在不同的无线通信系统中可能采用不同的命名方式，但本发明中采用统一的术语，在应用到具体的系统中时，可以替换为相应系统中采用的术语。
在本发明的所有实施例和实施方式中，如未特别说明：
●“高层”(higher layer(s)，或者upper layer(s))可以指在一个给定的协议栈(protocol stack)中，一个给定的参考协议层或参考协议子层(例如物理层)之上的一个或多个协议层或协议子层。例如，对于物理层，“高层”可以指MAC(Medium Access Control，介质访问控制)层，或者RLC(Radio Link Control，无线链路控制协议)层，或者PDCP(Packet Data Convergence Protocol，分组数据汇聚协议)层，或者PC5RRC(Radio Resource Control，无线资源控制)层，或者PC5-S层，或者RRC层，或者V2X(Vehicle-to-everything，车辆到万物)层，或者应用层，或者V2X应用层，等等。如未特别说明，所述参考协议层是物理层。
●“配置”(configure)可以指一个通信节点(如UE，或者eNB，或者gNB)中的个协议层(如RRC层)实体向另一个协议层(如物理层)实体提供配置信息。
●“配置”可以指一个通信节点向另一个通信节点提供配置信息(例如从基站向UE传输RRC信令，其中包含所述配置信息；又如从UE-A向UE-B传输PC5-RRC信令，其中包含所述配置信息)。
●“配置”可以包括“预配置”(pre-configure)。其中，“预配置”可以指将相应的配置信息预置在UE中特定的存储位置，或者将相 应的配置信息预置在UE能存取的特定的存储位置。
●常数Tc可以定义为：Tc＝1/(Δfmax·Nf)，其中Δfmax＝480·103Hz，Nf＝4096。
●常数κ可以定义为：κ＝Ts/Tc＝64，其中Ts＝1/(Δfref·Bf，ref)，Δfref＝15·103Hz，Nf，ref＝2048。
●μ可以表示子载波间隔配置(subcarrier spacing configuration)，例如μ＝0；Δf可以表示相应的子载波间隔(subcarrier spacing，SCS)，例如μ＝0对应Δf＝15kHz。
●“符号”指的是OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号。
● 可以表示每个子帧中的时隙的个数。
●可以表示每个时隙中的符号的个数。
●一个资源(resource)可以对应下面中的一项或多项：
■时域(time domain)上的一个或多个参数。例如，所述资源的起始符号；又如，所述资源的起始时隙；又如，所述资源占用的符号个数；又如，所述资源占用的时隙个数。
■频域(frequency domain)上的一个或多个参数。例如，所述资源的起始子信道；又如，所述资源的起始RB(resource block，资源块)；又如，所述资源的起始子载波；又如，所述资源占用的子信道个数；又如，所述资源占用的RB个数；又如，所述资源占用的子载波个数。
■码域(code domain)上的一个或多个参数。例如，所述资源对 应的循环移位(cyclic shift)值或相应的循环移位索引；又如，所述资源对应的循环移位对(cyclic shift pair)值或相应的循环移位对索引。
■空域(spatial domain)上的一个或多个参数。例如，所述资源对应的层(layer)，其中一个“层”可以指一个MIMO(Multiple Input Multiple Output，多输入多输出)层。
●“RB”可以指VRB(virtual resource block，虚拟资源块)，或者PRB(physical resource block，物理资源块)，或者CRB(common resource block，公共资源块)，或者IRB(Interlaced Resource Block，交织资源块)。
●“编号”和“索引”可以互换。例如，一个RB的编号(number)也可以称为所述RB的索引(index)。又如，“将一个RB编号(numbered)为0”也可以表述为“将一个RB索引(indexed)为0”。
●一个序列(或者数组，或者列表，或者有序的集合，等等)中的元素的编号可以从0开始。例如，一个RB集的第一个RB可以称为所述RB集的RB 0。
●一个对象(例如一个子载波、一个时隙、一个循环移位，等等)可以用其索引表示，例如编号为0的CRB可以称为CRB 0。
●若在提到一个类型的对象时未指明相应的数量，则所述对象的数量可以是一个，或者多个。例如，在“在一个信道上执行传输”中，所述“传输”(transmission(s))可以对应一个传输，或者多个传输。
●Δ(x1，x2)可以表示x1和x2之间的偏移(offset between x1and x2)，其中，所述x1和所述x2可以是两个可以比较的参数(或变量)，或者一个参数(或变量)的两个可能的值(例如，所述x1和所述x2可以是两个时隙，或者两个子帧，或者两个帧，或者两个子载波，或者两个RB，或者两个子信道，等等)。
●Δ(x1，x2)可以等于x2-x1。例如，记CRB集合 且 则Δ(x1，x2)可以等于
●Δ(x1，x2)可以等于idx(x2)-idx(x1)，其中idx(x1)和idx(x2)分别是x1和x2在同一个集合中对应的元素的索引。例如，记CRB集合且则Δ(x1，x2)可以等于3-0＝3。
●“x1和x2之间的偏移”又可以称为x2相对于x1的偏移(offset of x2with respect to x1，或者offset of x2relative to x1)。
●“x1和x2之间的偏移”又可以称为从x1到x2的偏移(offsetfrom x1to x2)。
●在适用的情况下，若Δ(x1，x2)＝D，可以将x2记为x2＝ADD(x1，D)。
●在适用的情况下，若Δ(x1，x2)＝D，可以将x1记为x1＝SUBTRACT(x2，D)。
●两个子载波之间的偏移可以是所述两个子载波的中心频率之间的偏移。
●取模运算(Modulo Operation)可以定义为r≡a mod N，其中，
■r是余数(remainder)。
■a＝N×q+r，其中，q可以称为a和N的整数商(integer quotient)。
■0≤r＜|N|。
●微秒的单位可以记为μs，或者us。
●一个还没有开始执行的传输(例如，在所述传输的预期的开始时间到达之前)可以称为一个“预期传输”(intended transmission)。
●一个“感测时隙持续时间”可以表示相应的感测时隙的持续时间，或者所述感测时隙本身。
●一个“感测时隙”可以表示所述感测时隙本身，或者所述感测时隙的持续时间。
●在适用的情况下，“功率检测”(power detection)可以称为“能量检测”(energy detection)，相应地，“检测到的功率”(detected power)可以称为“检测到的能量”(detected energy)，“功率检测阈值”(power detection threshold)可以称为“能量检测阈值”(energy detection threshold)。
●一个“SL时隙”可以指一个配置或预配置了SL资源的时隙。其中，所述“SL资源”可以不包括用于同步流程的资源(例如用于传输S-SS/PSBCH(S-SS/Physical Sidelink Broadcast CHannel，或者Sidelink-Synchronization Signal/Physical Sidelink Broadcast CHannel)块的资源)，或者包括用于同步流程的资源。
●一个“SL时隙”可以指一个属于某个SL资源池的时隙。
●一个SL时隙中的SL符号集合可以记为其中分别表示相应的符号在所述时隙内的索引，其中 其中是所述时隙内第一个SL符号的索引(例如通过参数sl-StartSymbol-r16配置)，是所述时隙内SL符号的个数(例如通过参数sl-LengthSymbols-r16配置)。
●一个将PSSCH(Physical Sidelink Shared Channel，物理侧行共享信道)及其关联的PSCCH(Physical Sidelink Control Channel，物理侧行控制信道)复用在同一个资源中的SL传输可以称为一个“PSCCH/PSSCH传输”。
●一个PSCCH/PSSCH传输(或其中的PSCCH传输，或其中的PSSCH传输)对应的资源分配(resource allocation，或者称为“侧行分配”，sidelink allocation)中的“第一个SL符号”(或者称为“第一个符号”)可以是所述资源分配所对应的SL时隙(TSL，0)中的符号或者符号例如，当明确指出所述资源分配中包含相应的PSCCH和/或PSSCH中“重复的符号”(duplicated symbol，即符号)时，所述“第一个SL符号”指的可以是符号又如，当未明确指出所述资源分配中包含相应的PSCCH和/或PSSCH中“重复的符号”时，所述“第一个SL符号”指的可以是符号又如，在为所述PSCCH和/或所述PSSCH传输执行物理资源映射时(例如在将所述PSCCH/PSSCH传输、或相应的PSCCH传输、或相应的PSSCH传输在符号中的资源元素复制到符号中之前)，或者 在为所述PSCCH/PSSCH传输中相应的PSCCH传输和/或PSSCH传输执行物理资源映射之前，所述“第一个SL符号”指的可以是符号又如，在确定所述PSCCH/PSSCH传输、或相应的PSCCH传输、或相应的PSSCH传输对应的CPE(CyclicPrefixExtension，循环前缀扩展)时，所述“第一个SL符号”指的可以是符号又如，在确定为所述PSCCH/PSSCH传输、或相应的PSCCH传输、或相应的PSSCH传输配置或分配的资源时，所述“第一个SL符号”指的可以是符号
●一个PSCCH/PSSCH传输(或相应的PSCCH传输，或相应的PSSCH传输)的“第一个SL符号”(或者称为“第一个符号”)指的可以是所述传输所对应的资源分配中的“第一个SL符号”。
●“一个子载波在一个SLBWP(或者RB集，或者保护带)中”指的可以是下面中的一项：
■所述子载波的中心频率在所述SL BWP(或者RB集，或者保护带)的带宽中。
■所述子载波的带宽在所述SLBWP(或者RB集，或者保护带)的带宽中。
■所述子载波是所述SL BWP(或者RB集，或者保护带)中的一个子载波。
●“一个子载波不在一个SL BWP(或者RB集，或者保护带)中”指的可以是下面中的一项：
■所述子载波的中心频率不在所述SL BWP(或者RB集，或者 保护带)的带宽中。
■所述子载波的带宽不在所述SL BWP(或者RB集，或者保护带)的带宽中。
■所述子载波不是所述SL BWP(或者RB集，或者保护带)中的一个子载波。
●“一个S-SS/PSBCH块在一个SL BWP(或者RB集，或者保护带)中”指的可以是下面中的一项：
■所述S-SS/PSBCH块的带宽在所述SL BWP(或者RB集，或者保护带)的带宽中。
■所述S-SS/PSBCH块的所有子载波都在所述SL BWP(或者RB集，或者保护带)中。例如，可以对所述每一个子载波分别应用“一个子载波在一个SL BWP(或者RB集，或者保护带)中”。
■所述S-SS/PSBCH块的所有子载波都是所述SL BWP(或者RB集，或者保护带)中的子载波。
●“一个S-SS/PSBCH块不在一个SL BWP(或者RB集，或者保护带)中”指的可以是下面中的一项：
■所述S-SS/PSBCH块的带宽的任何部分都不在所述SL BWP(或者RB集，或者保护带)的带宽中。
■所述S-SS/PSBCH块的任何子载波都不在所述SL BWP(或者RB集，或者保护带)中。例如，对所述S-SS/PSBCH块的任何子载波，“所述子载波在所述SL BWP(或者RB集，或者保 护带)中”都不成立。
■所述S-SS/PSBCH块的任何子载波都不是所述SL BWP(或者RB集，或者保护带)中的子载波。
●在时域，一个“帧”(frame，或者称为“无线帧”，radio frame)可以是一个系统帧(system frame)，或者是一个直接帧(direct frame)。一个帧号周期(例如记为TFNP)可以是一个预定义或配置或预配置的值，例如，TFNP＝1024个帧。每个帧的持续时间可以是Tf＝10毫秒，其中可以包含10个子帧，其中每个子帧的持续时间为Tsf＝1毫秒。每个子帧中可以包含个时隙，例如，一个时隙在子帧中的索引可以记为 一个时隙在帧中的索引可以记为 其中，可以等于10·2μ。一个帧号周期中的时隙索引可以记为 其中可以等于(例如，1024·(10·2μ))。
5G(或者称为NR，New Radio)既可以工作于授权频谱(例如2010MHz-2025MHz)，也可以工作于非授权频谱(例如5150MHz-5925MHz的部分或全部，又如5925-7125MHz的部分或全部，又如5925-6425MHz的部分或全部)。
当工作于非授权频谱时，一个支持5G的通信节点(或者称为“节点”，例如基站，又如UE)可以对一个“信道”(channel，或者“共享频谱信道”，shared-spectrum channel)执行一个“信道接入流程”(channel access procedure)。其中，一个信道可以对应一个由若干连续的资源块(resource block，RB)组成的集合。在一个或多个共享频谱信道上执行的操作可以称为“带共享频谱信道接入的操作”(operation with shared spectrum channel access)。作为对比，在授权频谱上的操作可以称为“无共享频谱信道接入的操作”(operation without shared spectrum channel access)。
一个信道可以对应一个载波(carrier)，或者一个载波的一部分。例如，一个信道可以对应一个20MHz带宽的载波；又如，一个信道可以对应一个40MHz带宽的载波中的频率较低的20MHz，另一个信道可以对应同一个载波中的频率较高的20MHz。
一个信道接入流程可以用于评估一个信道是否可以用于执行一个或多个传输(或者称为“评估是否可以在一个信道上执行一个或多个传输”)，其中所述评估操作可以称为CCA(Clear Channel Assessment，空闲信道评估)。这种在使用一个信道前先执行CCA的机制可以称为LBT(Listen Before Talk，先听后说)。
在一个信道接入流程中，可以基于对一个信道的“感测”(sensing)操作，判断所述信道的状态(例如，作为信道接入流程的结果或输出)。例如，信道状态“空闲”可以表示信道接入成功，或表示相应的信道可用，或表示在所述信道上可以执行一个或多个传输；又如，信道状态“忙”可以表示信道接入失败，或表示相应的信道不可用，或表示在所述信道上不能执行任何传输)。具体地，例如，若所述信道在一个“推迟持续时间”(defer duration)中的感测时隙持续时间(sensing slot durations)中的感测结果为空闲，且在紧接着的N个连续的额外感测时隙持续时间(additional  sensing slot duration(s))中的感测结果都是空闲，则可以将所述信道的感测结果确定为空闲。其中，N可以是一个大于或等于0的整数；一个感测时隙持续时间(例如记为Tsl)可以是一个预定义或配置或预配置的值，例如，Tsl＝9us；一个推迟持续时间(例如记为Td)可以由一段长度为Tf的时间以及紧接着的mp′个连续的感测时隙组成，其中Tf可以是一个预定义或配置或预配置的值(例如Tf＝16us)，mp′可以是一个大于0的整数。所述一段长度为Tf的时间可以以一个感测时隙开始。
在一个感测时隙持续时间内，若一个信道上检测到的功率(例如记为Xdetected)小于(或者，小于或等于)一个功率检测阈值(例如记为Xthresh)的时长至少为Tsl，thresh，则可以认为所述信道在所述感测时隙持续时间内是空闲的，否则可以认为所述信道在所述感测时隙持续时间内是忙的。其中，Tsl，thresh可以是一个预定义或配置或预配置的值，例如，Tsl，thresh＝4us。
若无法在一个预期传输的开始时间之前(例如，在所述传输对应的第一个符号之前)接入相应的信道(例如，由于所述信道的状态为“忙”而无法接入所述信道)，则可以认为产生了一个“信道接入失败”，或者，在适用的情况下，称为“LBT失败”。
在执行信道接入流程后在相应的信道上执行的传输，可以称为“信道占用”(Channel Occupancy，CO)，相应的持续时间可以称为“信道占用时间”(Channel Occupancy Time，COT)。一个COT可以在一个或多个通信节点之间共享，相应地，所述COT对应的时间可以包括所述一个或多个通信节点在相应的信道上执行传输的时间，以及这些传输之间的传输 间隔(transmission gap)所对应的时间(例如，当所述传输间隔的持续时间小于或等于25us时)。
信道接入流程可以按用途、适用场景等分为多种类型。例如，若将执行传输前感测结果为空闲的感测时隙所跨越的时间记为则在“信道接入流程类型1”中，是随机的；在“信道接入流程类型2”中，是确定的。信道接入流程类型1可以用于非共享的COT或者共享的COT；信道接入流程类型2可以用于在一个其他通信节点共享的COT中执行信道接入。
信道接入流程类型2可以按照的特点划分为多个子类型，例如，下面中的一种或多种：
●信道接入流程类型2A，其中，或者， 或者，这可以适用于相应的传输和前一个传输(immediately preceding transmission)的间隔(例如记为)满足一定条件的情况，例如，又如，又如，
●信道接入流程类型2B，其中，或者， 或者，或者，或者，这可以适用于所述满足一定条件的情况，例如，又如，又如，又如，又如，
●信道接入流程类型2C，其中，在执行传输前不对相应的信道进行 感测(例如，这可以对应)。这可以适用于所述满足一定条件的情况，例如，又如，
一个“多信道接入流程”(multi-channel access procedure)指的可以是为在多个信道(例如将其对应的信道集合记为CHacc)上执行一个或多个传输(例如，同时进行的多个传输)而执行(例如，并行执行)的一个或多个信道接入流程。其中，所述“一个或多个信道接入流程”可以是在一个“目标感测信道集合”(例如记为CHsns＝{ch0，ch1，...，chQ-1}，其中Q可以是一个大于或等于1的整数)中的信道上分别执行的信道接入流程。所述集合CHsns可以等于所述集合CHacc，或者按其他方式定义(例如，若所述集合CHacc中的信道所在的载波上没有配置保护带，则所述集合CHsns可以等于所述载波上的所有信道的集合)。具体地，例如，可以在所述集合CHsns中的每一个信道上分别执行一个信道接入流程(例如，根据信道接入流程类型1)，并根据相应的结果确定是否可以执行所述一个或多个传输(例如，对所述一个或多个传输中的每一个传输，若所述传输对应的所有信道的接入结果都是空闲，则可以执行所述传输)。又如，可以在所述集合CHsns中选择(例如，均匀地、随机地选择)一个信道chj并在其上执行信道接入流程类型1，而在所述集合CHsns中的其他每一个信道上分别执行信道接入流程类型2(例如信道接入流程类型2A，或信道接入流程类型2B，或信道接入流程类型2C)或者一个不是信道接入流程类型1的其他信道接入流程，并根据相应的结果确定是否可以执行所述一个或多个传输。
对非授权频谱，一个信道中的可用资源块的集合可以称为一个“RB集”(RB set)。在一个载波(例如记为c)中，可以存在 个RB集，例如分别记为其中，对 rsi的最低编号的CRB(Common Resource Block，公共资源块)和最高编号的CRB可以分别记为rsi的RB个数可以记为其中可以等于另外，可选地，所述载波中可以存在个用于分隔所述个RB集的保护带(guard band，或者称为“intra-cell guard band”，小区内保护带)，例如分别记为其中，对 gbj的最低编号的CRB和最高编号的CRB可以分别记为 gbj的RB个数可以记为其中可以等于 gbj可以用于分隔RB集rsj和RB集rsj+1。例如，一个带宽为40MHz的载波中，对于15kHz SCS，可以存在216个连续的RB(例如记其CRB编号分别为0，1，......，215)，且所述216个RB可以分成3个子集，分别对应一个RB集 一个保护带以及一个RB集
所述个RB集组成的集合可以记为 对两个相邻的RB集(rsi和rsi+1)之间可以存在零个或一个保护带。所述个保护带组成的集合可以记为对若gbj是一个空集，则可以认为相应的保护带不存在。若对gbj都是空集，则可以认为载波c的RB集之间无任何保护带。
载波c中可以配置个BWP(Bandwidth Part，带宽 片段)，例如分别记为对 bwpk可以对应个RB集，例如分别记为其中，对 是所述集合RSC中的一个元素，且 bwpk的最低编号的CRB(例如记为)可以等于bwpk的RB个数(例如记为)可以等于所述个RB集可以是个连续的RB集，例如对ak，l＝ak，0+l。为方便起见，在不会引起歧义的情况下(例如，在只涉及到一个BWP的操作中)，可以将记为将分别记为 所述个RB集组成的集合可以记为 所述集合RSBWP可以等于所述集合RSC，或者等于所述集合RSC的一个子集。
对非授权频谱，为保证不同通信节点对信道的公平共享，可以对信号传输的PSD(Power Spectral Density，功率谱密度)和/或OCB(Occupied Channel Bandwidth，占用信道带宽)施加一定的限制。例如，最大PSD不能超过10dBm/MHz。又如，在使用一个信道时，包含99％的传输功率的带宽必须大于或等于名义信道带宽(Nominal Channel Bandwidth)的一个特定的百分比(例如80％)。所述限制(如果有的话)可以由监管机构制定和强制执行。在不同的国家或地区，对PSD和/或OCB的限制(如果有的话)可以不同。
为满足OCB的限制，一个无线传输可以对应一个或多个“交织” (interlace)。例如，可以定义MINT(MINT≥1)个交织，对应的交织集合为其中，对m∈{0，1，...，MINT-1}，交织intm可以对应CRB集合{m，MINT+m，2MINT+m，3MINT+m，...}。MINT可以是一个预定义或配置或预配置的值。
MINT的值可以与子载波间隔配置μ有关(例如，对μ＝0，MINT＝10；又如，对μ＝1，MINT＝5)。
对同一个子载波间隔配置μ，可以为不同的用途(例如，不同类型的SL传输)定义不同的“交织”。例如，对同一个子载波间隔配置μ，为S-SS/PSBCH传输定义一个MINT的值，为PSCCH/PSSCH传输和/或PSFCH传输定义另一个MINT的值。例如，对同一个子载波间隔配置μ，为S-SS/PSBCH传输定义一个MINT的值，对PSCCH/PSSCH传输和/或PSFCH传输则不定义交织。
一个无线传输占用的一个或多个RB组成的集合可以与一个或多个交织和一个或多个RB集有关。
一个交织中的RB可以称为IRB。例如，在bwpk中，交织intm中的IRB的编号可以按频率从小到大的顺序分别记为 相应的CRB编号可以分别记为相应的PRB编号可以分别记为
IRB编号和相应的CRB编号的关系可以记为其中可以定义为：
IRB编号和相应的PRB编号的关系可以记为 其中可以定义为：
记为所述集合IALL的一个子集，其中可以是连续的交织(例如对或者是非连续的交织。记为所述集合RSBWP的一个子集，其中可以是连续的RB集(例如对或者是非连续的RB集。可以表示从集合IMAP和集合RSMAP到一个包含一个或多个RB的集合的映射。可以定义为下面中的一项：
●
●(即和的交集)。
●
●(即和的交集)。
其中，是所述集合RSMAP中的所有RB集的并集中的所有RB(或者称为“所述集合RSMAP中的所有RB集的并集中的所有RB组成的集合”)；是所述集合IMAP中的所有交织对应的所有RB(或者称为“所述集合IMAP中的所有交织对应的所有RB组成的集合”)；是和的并集，其中是所述集合RSMAP中的所有RB集之间的所有保护带(如果有的话)的并集中的所有RB(或者称为“所述集合RSMAP中的所有RB集之间的所有保护带(如果有的话)的并集中的所有RB组成的集合”)。
例如，若MINT＝5，IMAP＝{int0，int1}，其中int0对应的CRB为{10，15，20，...}，int1对应的CRB为{11，16，21，...}，RSMAP＝{rs0，rs1}，其中rs0对应的CRB为{10，11，12，...，59}，rs1对应的CRB为{66，67，68，...，115}，则
●
●
●
●
相应地，可以等于下面中的一项：
●即{10，11，12，...，59，66，67，68，...，115}。
●即{10，11，15，16，20，21，...，55，56，66，70，71，75，76，80，81，...，110，111，115}。
●即{10，11，12，...，115}。
●即{10，11，15，16，20，21，...，110，111，115}。
对不同的用途(例如对不同的信道或信号的资源映射)，的定义可以不同。
对非授权频谱，在信道接入成功后，为避免其他通信节点也(同时， 或稍后一点)检测到信道可用并占用信道(从而引起冲突)，应尽快启动相应的传输。另一方面，在一个通信系统中(例如一个使用NR技术的通信系统中)，一个传输的起始时间可能不是任意的，而是被限制在一些离散的时间点上。例如，所述起始时间只能位于一个时隙的起始时间，或者只能位于一个时隙中特定的符号(例如，第一个SL符号)的起始时间，这极大地限制了在非授权频谱执行传输的灵活性。通过引入CPE(Cyclic PrefixExtension，循环前缀扩展)功能，可以在一定程度上改善这个问题。例如，假设t＝0对应一个子帧的起始时间，且所述子帧内编号为 的符号的起始时间为符号长度(或称为“符号持续时间”)为则在使用CPE的情况下，一个起始符号为l0的传输(例如记为)可以开始于(而不是未使用CPE的情况下的)，其中，在的时间连续信号(time-continuous signal)可以定义为
其中，
●的单位可以是秒。
●的单位可以是秒。
●包括相应的符号中CP的长度(例如记为)和核心OFDM符号的长度(例如记为)。
●表示所述符号l0在时的连续时间信号。
●p表示相应的天线端口。
●μ是相应的子载波间隔配置。
●可以称为CPE长度(或者CPE持续时间)。
●的单位可以是秒。
对所述传输所述CPE长度可以按照下面中的一种方式定义：
●
●
●
其中，
●对不同方式调度(或触发)的传输，的定义可以不同。例如，对一个动态许可(dynamic grant)调度的传输，又如，对一个配置许可(configured grant)调度的传输，
●可以等于所述符号l0之前的个符号(thesymbol(s)immediately preceding symbol l0)的长度之和。例如，可以定义为(或者，)。具体地，例如， 相应地，所述“个符号”对应所述符号l0的前一个符号(the symbol immediately preceding symbol l0，例如记为符号l0，m1)。又如，相应地，所述“个符号”对应所述符号l0的前一个符号(例如记为符号l0，m1)和所述符号l0，m1的前一个符号(例如记为符号l0，m2)。其中，
■可以是一个预定义或配置或预配置的值。例如，
■可以是一个通过DCI(Downlink Control Information)或SCI(Sidelink Control Information)指示的值，其中，所指示的值可以是一个预定义或配置或预配置的集合中的一个元素。
■可以与μ有关。例如，又如，对μ∈{0，1}，又如，对μ＝2，
●可以等于其中，可以等于 (或者，)，或者是一个预定义或配置或预配置的、一个子帧中的符号索引；可以等于μ，或者是一个预定义或配置或预配置的子载波间隔配置。例如， 又如，
●可以等于所述符号l0之前的个符号的长度之和减去一个与信道接入和/或定时提前有关的偏移值(例如记为)，或者等于减去或者等于减去例如，可以定义为(或者，)，或者定义为或者定义为 其中，
■可以是一个预定义或配置或预配置的值。例如，
■可以是一个通过DCI或SCI指示的值，其中，所指示的 值可以是一个预定义或配置或预配置的集合中的一个元素。
■可以与μ有关。例如，又如，对μ∈{0，1}，又如，对μ＝2，
■可以是满足(或者， )的最大整数。
■可以是满足(或者， )的最大整数。
■可以是满足的最大整数。
■可以是满足的最大整数。
■的单位可以是秒。
■可以与有关。例如，对的每一个值都对应着的一个唯一的值。
■可以是一个预定义或配置或预配置的值。例如， 又如，又如，又如，又如，又如，
■可以是一个通过DCI或SCI指示的值，其中，所指示的值可以是一个预定义或配置或预配置的集合中的一个元素。
■可以通过一个配置的值或DCI中指示的值或SCI中指示的值指示一个给定的的值(例如)和一个给定的的值(例如)组成的配对，其中，所述配对可以是一个预定义或配置或预配置的集合中的一个元素。
■可以与μ有关。
■可以配置或指示为等于(或者，)，相应地，
●对不同方式调度(或触发)的传输，的定义中的部分或全部可以不同。例如，对一个动态许可调度的传输，是一个预定义的与μ无关的值，或者是一个配置或预配置的值。又如，对一个配置许可调度的传输，
所述传输的所有可能的的值(或者称为“所述传输的所有允许的的值”)的集合可以记为其中，所述集合中最大的元素可以记为
对所述传输可以对应一个上界(例如称为所述传输的“CPE上界”，例如记为)。例如，可以等于又如，可以是一个大于所述集合中的任何元素的值。
可以与l0有关，或者与l0无关。
可以与μ有关，或者与μ无关。
可以等于下面中的一项：
●
●中的最大值。
●中的最大值。
●
●中的最大值。
●中的最大值。
●(或者，)。
●中的最大值。
●中的最大值。
●
●(或者，
●(或者，)。
对不同方式调度(或触发)的传输，的定义可以不同。例如，对一个动态许可调度的传输，(或者，)。又如，对一个配置许可调度的传输，(或者，
[实施例一]
下面结合图1来说明本发明的实施例一的由用户设备执行的方法。
图1示出了根据本发明的实施例一的由用户设备执行的方法对应的流程图。
如图1所示，在本发明的实施例一中，用户设备UE执行的步骤包括：步骤S101和步骤S103。
具体地，在步骤S101，确定预留资源(reserved resource(s))。例如，在时隙之前(例如，包括所述时隙又如，不包括所述时隙)，确定资源池rpu中的时隙中的预留资源，其中，所述时隙可以是一个晚于所述时隙的时隙；i∈{0，1，...，T′max-1}，相 应地，所述资源池rpu在一个帧号周期内的时隙集合可以记为
所述预留资源组成的集合可以记为其中包含的预留资源的个数可以记为其中，可以是一个大于或等于0的整数。具体地，若则可以记为若则可以是一个空集对资源可以对应所述时隙中从子信道开始的个连续的子信道(例如记为子信道集合其中可以是一个大于或等于1的整数。所述集合中任意两个预留资源可以重叠(例如，在至少一个子信道上重叠)或者不重叠。所述集合的并集可以记为
所述资源池rpu中的所有RB集组成的集合可以记为 其中可以是一个大于或等于1的整数。
所述集合RSRP，u中的每一个RB集可以分别对应一个信道(即一个可以在其上执行信道接入的“信道”)，例如，对对应的信道可以记为所述集合RSRP，u对应的信道集合可以记为
所述时隙可以是所述资源池rpu中的时隙，或者不是所述资源池rpu中的时隙。所述时隙和所述时隙之间的时隙偏移可以记为其中，D可以是一个预定义或配置或预配置的值，或者由一个或多个预定义或配置或预配置的值确定。
对所述预留资源可以是在时隙中 检测到的SCI中指示的一个资源，其中mj∈{0，1，...，T′max-1}，且所述时隙早于所述时隙或者，所述时隙不晚于所述时隙所述SCI指的可以是所述时隙中检测到的一个PSCCH传输中携带的第一阶段SCI(例如，相应的SCI格式为SCI格式1-A)，和/或所述第一阶段SCI关联的第二阶段SCI。所述预留资源可以是在所述SCI中指示的一个或多个资源中的一个。例如，可以通过所述SCI中的“时间资源分配”(Time resource assignment)字段和/或“频率资源分配”(Frequency resource assignment)字段和/或“资源预留周期”(Resource reservation period)字段指示所述一个或多个资源。
此外，在步骤S103，执行信道接入流程。例如，为了确定能否在所述资源池rpu中的一个时隙执行一个SL传输，在所述时隙的开始时间之前的一段时间执行信道接入流程。
所述信道接入流程可以用于一个信道。例如，相应地，对所述信道执行所述信道接入流程(例如，使用信道接入流程类型1)。
所述信道接入流程可以是一个“多信道接入流程”。例如， 相应地，对所述集合CHRP，u中的信道执行多信道接入流程。
对在对信道执行的信道接入流程中，感测操作(例如，功率检测和/或功率比较)可以与所述步骤S101中确定的预留资源有关。
具体地，例如，若在第一感测时间区间(例如记为)对所述信道执行功率检测，且所述第一感测时间区间的部分或全部和第一资源预留时间区间(例如记为)的部分或全部重叠，则 可以在所述功率检测中执行频率排除(或者称为频率资源排除)。其中，
●和的关系可以是
●和的关系可以是
●和的关系可以是
●和的关系可以是
●所述“频率排除”指的可以是在确定所述信道上检测到的功率Xdetected时，将一个或多个资源所对应的频率上的功率排除在外(对两个或多个资源重叠的频率只排除一次)。例如，所述一个或多个资源可以按下面中的一种方式定义：
■所述集合中的资源(如果有的话)。
■所述集合中的、在所述信道对应的RB集(即)内的资源(如果有的话)。
■所述集合中的资源。
●所述第一资源预留时间区间可以与所述时隙有关。例如，
■可以等于其中，
◆可以等于所述时隙的起始时间。
◆可以等于所述时隙的第一个符号的起始时间。
◆可以等于所述时隙的第一个SL符号(即符号)的起始时间。
◆可以等于所述时隙的第二个SL符号(即符号)的起始时间。
◆等于所述时隙中用于PSCCH/PSSCH传输的第一个SL符号的起始时间。
◆等于所述时隙中用于PSCCH/PSSCH传输的第二个SL符号的起始时间。
◆可以是一个预定义或配置或预配置的值。例如，
◆可以等于所述时隙的第一个符号对应的CPE上界。
◆可以等于所述时隙的第一个SL符号对应的CPE上界。
◆可以等于所述时隙的第二个SL符号对应的CPE上界。
■可以等于所述时隙的结束时间。
■可以等于所述时隙的最后一个符号的结束时间。
■可以等于所述时隙的倒数第二个符号的结束时间。
■可以等于所述时隙的最后一个SL符号的结束时间。
■可以等于所述时隙的倒数第二个SL符号的结束时间。
■可以等于所述时隙中用于PSCCH/PSSCH传输的最后一个SL符号的结束时间。
■可以等于所述时隙中用于PSCCH/PSSCH传输的倒数第二个SL符号的结束时间。
在所述信道接入流程所涉及的感测操作中，功率检测阈值Xthresh可以与所述步骤S101中确定的预留资源有关，或者与所述步骤S101中确定的预留资源无关。例如，Xthresh≤Xi，Thresh_max；又如，Xthresh≤XThresh_max。其中，Xi，Thresh_max可以等于其中BWi，excluded和的单位相同(例如都是MHz)，BWi，excluded可以是在所述“频率排除”中，所有被排除的频率资源所对应的带宽之和(对两个或多个资源重叠的频率只计算一次)；可以是所述信道的带宽，XThresh_max可以对应在感测操作中不对所述信道执行“频率排除”时的最大功率检测阈值，例如，XThresh_max可以按下面中的一项或多项定义：
●若可以长期保证没有其他技术共享所述信道(例如通过监管的级别得到所述保证)，则其中，若存在监管法规要求的最大功率检测阈值，则Xr等于所述最大功率检测阈值；否则Xr＝Tmax+10dB。
●若无法长期保证没有其他技术共享所述信道则
●若配置了一个最大功率检测阈值(例如通过参数maxEnergyDetectionThreshold配置)，则XThresh_max所配置的最大功率检测阈值。
●若没有配置一个最大功率检测阈值，则先确定一个缺省功率检测阈值(例如记为X′Thresh_max)，然后，
■若配置了一个功率检测阈值偏移(例如通过参数energyDetectionThresholdOffset配置)，则根据所配置的偏移值调整所述缺省功率检测阈值X′Thresh_max，且XThresh_max等于调整后的X′Thresh_max。
■否则，XThresh_max＝X′Thresh_max。
其中，TA＝10dB，PH＝23dBm，PTX可以设置为所述UE在所述信道的最大输出功率，或者设置为所述UE在所述信道的最大输出功率的最大值(当所述最大输出功率的值对应一个区间时)，
所述缺省功率检测阈值X′Thresh_max可以按下面中的一种或多种方式确定：
●若配置了“无其他技术共享信道”标志(例如通过参数absenceOfAnyOtherTechnology配置)，则 其中，若存在监管法规要求的最大功率检测阈值，则X′r等于所述最大功率检测阈值；否则X′r＝Tmax+10dB。
●若没有配置“无其他技术共享信道”标志，则
可选地，在本发明的实施例一中，可以为任何一个预留或配置或预配置了SL资源的时隙确定“预留资源”，而不仅限于为一个资源池中的时 隙确定“预留资源”。相应地，一个“预留资源”可以是其他UE通过SCI预留的资源，或者是配置或预配置的资源(例如，为S-SS/PSBCH的传输或接收配置或预配置的资源；又如，为PSFCH的传输或接收配置或预配置的资源)，所述第一资源预留时间区间可以包括所述“预留资源”所对应的符号，以及，可选地，所述“预留资源”对应的第一个符号的CPE上界。
这样，根据实施例一所述，本发明提供了一种方法，通过在信道接入流程的功率检测环节中排除已检测到的其他UE预留的资源上的功率，极大降低了在信道接入时不同SL UE之间互相阻塞对方的概率，提高了在非授权频谱中SL通信的效率。
[变形例]
下面，利用图2来说明作为一种变形例的可执行本发明上面所详细描述的用户设备执行的方法的用户设备。
图2是表示本发明所涉及的用户设备UE的框图。
如图2所示，该用户设备UE20包括处理器201和存储器202。处理器201例如可以包括微处理器、微控制器、嵌入式处理器等。存储器202例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器202上存储有程序指令。该指令在由处理器201运行时，可以执行本发明详细描述的由用户设备执行的上述方法。
上文已经结合优选实施例对本发明的方法和涉及的设备进行了描述。本领域技术人员可以理解，上面示出的方法仅是示例性的，而且以上说明的各实施例在不发生矛盾的情况下能够相互组合。本发明的方法并不局限于上面示出的步骤和顺序。上面示出的网络节点和用户设备可以包括更多的模块，例如还可以包括可以开发的或者将来开发的可用于基站、AMF(Access and Mobility Management Function，接入和移动性管理功能)、UPF(User Plane Function，用户面功能)、MME(Mobility Management Entity，移动管理实体)、S-GW(Serving Gateway，服务网关)或UE的模块等等。上文中示出的各种标识仅是示例性的而不是限制性的，本发明并不局限于作为这些标识的示例的具体信元。本领域技术人员根据所示实施例的教导可以进行许多变化和修改。本领域技术人员应该理解，数学表达式或数学等式或数学不等式的部分或全部可以进行一定程度的简化或者变换或者重写，例如合并常数项，又如交换两个加法项，又如交换两个乘法项，又如将一个项改变正负号后从等式或不等式的左边移动到右边，又如将一个项改变正负号后从等式或不等式的右边移动到左边，等等；简化或者变换或者重写前后的数学表达式或数学等式或数学不等式可以认为是等同的。
应该理解，本发明的上述实施例可以通过软件、硬件或者软件和硬件两者的结合来实现。例如，上述实施例中的基站和用户设备内部的各种组件可以通过多种器件来实现，这些器件包括但不限于：模拟电路器件、数字电路器件、数字信号处理(DSP)电路、可编程处理器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、可编程逻辑器件(CPLD)，等 等。
在本发明中，“基站”可以指具有一定发射功率和一定覆盖面积的移动通信数据和/或控制交换中心，例如包括资源分配调度、数据接收和传输等功能。“用户设备”可以指用户移动终端，例如包括移动电话、笔记本等可以与基站或者微基站进行无线通信的终端设备。
此外，这里所公开的本发明的实施例可以在计算机程序产品上实现。更具体地，该计算机程序产品是如下的一种产品：具有计算机可读介质，计算机可读介质上编码有计算机程序逻辑，当在计算设备上执行时，该计算机程序逻辑提供相关的操作以实现本发明的上述技术方案。当在计算系统的至少一个处理器上执行时，计算机程序逻辑使得处理器执行本发明实施例所述的操作(方法)。本发明的这种设置典型地提供为设置或编码在例如光介质(例如CD-ROM)、软盘或硬盘等的计算机可读介质上的软件、代码和/或其他数据结构、或者诸如一个或多个ROM或RAM或PROM芯片上的固件或微代码的其他介质、或一个或多个模块中的可下载的软件图像、共享数据库等。软件或固件或这种配置可安装在计算设备上，以使得计算设备中的一个或多个处理器执行本发明实施例所描述的技术方案。
此外，上述每个实施例中所使用的基站设备和终端设备的每个功能模块或各个特征可以由电路实现或执行，所述电路通常为一个或多个集成电路。设计用于执行本说明书中所描述的各个功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)或通用集成电路、现场可编程门阵列(FPGA)或其他可编程逻辑器件、分立的门或晶体管逻辑、或分立的硬件组件、或以上器件的任意组合。通用处理器可以是微处 理器，或者所述处理器可以是现有的处理器、控制器、微控制器或状态机。上述通用处理器或每个电路可以由数字电路配置，或者可以由逻辑电路配置。此外，当由于半导体技术的进步，出现了能够替代目前的集成电路的先进技术时，本发明也可以使用利用该先进技术得到的集成电路。
尽管以上已经结合本发明的优选实施例示出了本发明，但是本领域的技术人员将会理解，在不脱离本发明的精神和范围的情况下，可以对本发明进行各种修改、替换和改变。因此，本发明不应由上述实施例来限定，而应由所附权利要求及其等价物来限定。

Claims (2)

  1. 一种由用户设备UE执行的方法，其特征在于包括：
    确定在一个未来的时隙中的预留资源；以及，
    在所述时隙的起始时间到达之前，为一个已调度在所述时隙中的SL传输执行信道接入流程；其中，
    在所述信道接入流程中，在执行功率检测时，排除所述预留资源对应的频率资源上的功率。
  2. 一种用户设备，包括：
    处理器；以及
    存储器，存储有指令，
    其中，所述指令在由所述处理器运行时执行根据权利要求1中所述的方法。
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