WO2021208103A1 - 直连通信中的资源选择方法、装置、电子设备及存储介质 - Google Patents

直连通信中的资源选择方法、装置、电子设备及存储介质 Download PDF

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WO2021208103A1
WO2021208103A1 PCT/CN2020/085440 CN2020085440W WO2021208103A1 WO 2021208103 A1 WO2021208103 A1 WO 2021208103A1 CN 2020085440 W CN2020085440 W CN 2020085440W WO 2021208103 A1 WO2021208103 A1 WO 2021208103A1
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time
time unit
resource
data
monitoring
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English (en)
French (fr)
Inventor
赵群
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to BR112022020910A priority Critical patent/BR112022020910A2/pt
Priority to JP2022562876A priority patent/JP7397219B2/ja
Priority to CN202080000674.5A priority patent/CN111670601B/zh
Priority to PCT/CN2020/085440 priority patent/WO2021208103A1/zh
Priority to KR1020227040130A priority patent/KR20230004672A/ko
Priority to US17/996,298 priority patent/US12532333B2/en
Priority to CN202311007808.8A priority patent/CN116782411A/zh
Priority to EP20931570.4A priority patent/EP4138478A4/en
Publication of WO2021208103A1 publication Critical patent/WO2021208103A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
    • 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
    • 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
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

Definitions

  • the present disclosure relates to the field of communication technology. Specifically, the present disclosure relates to a method, device, electronic device, and storage medium for resource selection in direct communication.
  • V2x includes V2V (vehicle-to-vehicle) communication, V2I (vehicle-to-infrastructure) communication, and V2P (vehicle-to-pedestrian) communication.
  • V2V vehicle-to-vehicle
  • V2I vehicle-to-infrastructure
  • V2P vehicle-to-pedestrian
  • the cellular network supports the V2x communication of the Internet of Vehicles, namely C-V2x (cellular based V2x, based on V2x for cellular networks).
  • the communication between the vehicle-mounted equipment and other equipment can be transferred through the base station and the core network, that is, the communication link between the terminal equipment and the base station in the original cellular network is used for UL/DL (uplink/downlink, downlink).
  • Link/uplink) communication can also be used for sidelink (SL, bypass/direct connection/secondary link) communication directly through the direct link between the devices.
  • sidelink communication Compared with the Uu interface (the interface between the user equipment and the wireless access network) communication, sidelink communication has the characteristics of short delay and low overhead, and is very suitable for direct communication between vehicle-mounted equipment and other peripheral equipment that is close to the geographical position.
  • 5G NR New Radio
  • 3GPP Rel-16 3GPP Rel-16
  • 5G V2x sidelink can provide higher communication rates, shorter communication delays, and more reliable communication quality.
  • 5G V2x technology mainly considers the communication between vehicle-mounted terminals, and does not consider much to the needs of terminal forms such as handheld terminals (for example, power saving).
  • the purpose of the present disclosure is to better meet the communication requirements and at least solve one of the technical defects existing in the prior art.
  • embodiments of the present disclosure provide a resource selection method in direct communication, the method including:
  • the time unit set corresponding to the resource used for direct communication, determine at least one first time unit that satisfies the monitoring condition; wherein, the time unit set includes one or more first time units;
  • embodiments of the present disclosure provide a resource selection device in direct communication, the device including:
  • the resource determining module is configured to determine at least one first time unit that satisfies the monitoring condition from the time unit set corresponding to the resource used for direct communication; wherein the time unit set includes one or more first time units;
  • the resource selection module is configured to determine the resource used to transmit the data to be sent according to at least one first time unit that satisfies the monitoring condition.
  • the embodiments of the present disclosure provide a resource selection method in direct communication, the method including:
  • the monitoring mode determine at least one time unit corresponding to the candidate resource
  • the resource used for transmitting the data to be sent is determined.
  • the foregoing monitoring mode includes not performing monitoring before performing resource selection or performing monitoring before performing resource selection.
  • determining at least one time unit corresponding to the candidate resource according to the monitoring mode includes:
  • At least one time unit corresponding to the candidate resource is determined according to the duration of the time unit for monitoring and the time when the resource selection is performed.
  • determining at least one time unit after the time when the resource selection is performed as the time unit corresponding to the candidate resource includes:
  • At least one time unit located after the time when the resource selection is performed and the time interval between the time when the resource selection is performed is not less than the fourth duration threshold is determined as the time unit corresponding to the candidate resource.
  • the duration of the aforementioned time unit for monitoring is determined.
  • determining at least one time unit corresponding to the candidate resource according to the duration of the time unit for monitoring and the time at which the resource selection is performed includes:
  • At least one time unit located after the time when the monitoring is started and the time interval between the time when the monitoring is started is not less than the fifth duration threshold is determined as the time unit corresponding to the candidate resource.
  • the channel used to transmit the data to be sent is monitored.
  • the data priority of the data to be sent is not less than the set priority, and/or, when the PDB (Packet Delay Budget) of the data to be sent is not greater than the sixth duration threshold, the data will not be selected before the resource selection. Perform monitoring, or perform monitoring less than the seventh duration threshold before performing resource selection.
  • PDB Packet Delay Budget
  • embodiments of the present disclosure provide a resource selection device in direct communication, the device including:
  • the resource determining module is configured to determine at least one time unit corresponding to the candidate resource according to the monitoring mode
  • the resource selection module is configured to determine a resource for transmitting data to be sent according to the determined resource corresponding to at least one time unit.
  • an embodiment of the present disclosure provides an electronic device including a memory and a processor; wherein a computer program is stored in the memory, and the processor is configured to execute the first aspect or the first aspect of the present disclosure when the computer program is running.
  • the resource selection method provided in any optional embodiment of the three aspects.
  • the embodiments of the present disclosure provide a computer-readable storage medium in which a computer program is stored.
  • the computer program is executed by a processor, the computer program is used to perform any of the first or third aspects of the present disclosure.
  • a resource selection method provided in an optional implementation manner.
  • FIG. 1 shows a schematic flowchart of a method for resource selection in direct communication provided by an optional embodiment of the present disclosure
  • FIG. 2 shows a schematic flowchart of a method for resource selection in direct communication provided by another optional embodiment of the present disclosure
  • Fig. 3 shows a schematic diagram of a principle for determining optional resources provided in an example of the present disclosure
  • Fig. 4 shows a schematic diagram of a principle for determining optional resources provided in another example of the present disclosure
  • Fig. 5 shows a schematic diagram of a principle for determining optional resources provided in another example of the present disclosure
  • FIG. 6 shows a schematic structural diagram of a resource selection device in direct communication provided by an optional embodiment of the present disclosure
  • FIG. 7 shows a schematic structural diagram of a resource selection device in direct communication provided by an optional embodiment of the present disclosure
  • FIG. 8 shows a schematic structural diagram of an electronic device to which an embodiment of the present disclosure is applicable.
  • User equipment includes both wireless signal receiver equipment, which only has equipment with a wireless signal receiver without transmitting capability, and equipment receiving and transmitting hardware.
  • a device capable of receiving and transmitting hardware for two-way communication on a two-way communication link.
  • Such equipment may include: cellular or other communication equipment, which has a single-line display or multi-line display or cellular or other communication equipment without a multi-line display; PCS (Personal Communications Service, personal communication system), which can combine voice and data Processing, fax and/or data communication capabilities; PDA (Personal Digital Assistant), which can include radio frequency receivers, pagers, Internet/Intranet access, web browsers, notebooks, calendars, and/or GPS (Global Positioning System (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device that has and/or includes a radio frequency receiver.
  • PCS Personal Communications Service, personal communication system
  • PDA Personal Digital Assistant
  • terminal can be portable, transportable, installed in vehicles (aviation, sea and/or land), or suitable and/or configured to be locally Operate, and/or in a distributed form, operate in any other location on the earth and/or space.
  • the "terminal”, “terminal device”, and “user equipment” used here can also be communication terminals, Internet terminals, music/video playback terminals, such as PDA, MID (Mobile Internet Device, mobile Internet device) and/or Mobile phones with music/video playback functions can also be devices such as smart TVs and set-top boxes.
  • time-frequency resources may be referred to as time-frequency resources
  • user equipment uses the mode of autonomous resource selection, resource reservation and channel sensing-based resource selection methods are adopted.
  • Each user equipment periodically reserves transmission resources for the next cycle during the current transmission. Compared with the time-frequency resources used for current transmission, the reserved resources are separated by a specified period in time and occupy the same size and position in frequency.
  • Each user equipment needs to constantly monitor the reservation information sent by other user equipment on the channel, and predict future interference on time-frequency resources based on the reservation information and the corresponding channel measurement results. The user equipment will try to select time and frequency resources with less interference for data transmission.
  • LTE V2x Long Term Evolution
  • the concept of "partial sensing" is introduced in LTE V2x (mainly to help handheld terminals) to achieve power saving effects. Since the periodic value of resource reservation in LTE V2x belongs to a limited set (for example, a set of ⁇ 100, 200,..., 1000 ⁇ ms), for the time-frequency resources in a given time unit, the time-frequency resources can be reserved.
  • the time position at which the transmission of the time-frequency resource occurs also belongs to a limited set (for example, the time unit set of ⁇ 100, 200, 300,..., 1000 ⁇ ms before the time unit).
  • the user equipment can only monitor the direct transmission in the previous part of the time unit, for example, only monitor the corresponding ⁇ 100,200,...,1000 ⁇ ms before K time units For the K time units, all the time-frequency resource reservations at this time position may not be missed.
  • the protocol allows user equipment to select resources only on a limited time set, and ensures to monitor all time positions that may be reserved for time-frequency resources on this time set. For other time positions, the user equipment can enter the energy-saving state.
  • the minimum value of the number of time units in the limited time set for resource selection by the user equipment can be restricted through base station configuration or pre-configuration, so as to prevent the time set from being too small and no suitable resources can be selected.
  • 5G V2x unlike LTE V2x, 5G V2x supports aperiodic resource reservation. Each current transmission can reserve at most one or two (determined by configuration or pre-configuration) time-frequency resources of the same size at any position within W (logical) time units in the future. 5G V2x also supports periodic resource reservation, which can be enabled and disabled through configuration or pre-configuration. At present, W is a fixed value in the communication protocol, which is 32 logical slots.
  • 5G V2X not only supports periodic resource reservation, but also supports aperiodic resource reservation.
  • aperiodic resource reservation in order to meet the requirement of "partial monitoring", that is, to monitor the time position of the transmission of resources on all possible reserved time units, new user equipment behaviors need to be defined.
  • partial monitoring that is, to monitor the time position of the transmission of resources on all possible reserved time units.
  • new user equipment behaviors need to be defined.
  • how the user equipment saves power in the case of non-periodical resource reservation is also an important issue that needs to be considered, especially for directly connected communication devices such as handheld terminals.
  • the solutions provided by the embodiments of the present disclosure are also applicable to any other user equipment that needs to perform direct communication.
  • the embodiments of the present disclosure provide a resource selection method in direct communication. Based on this method, the power consumption of the direct communication device can be effectively reduced, and the purpose of energy saving of the device can be achieved.
  • Time unit The time unit described in the embodiment of the present disclosure may refer to either a logical time unit or a physical time unit. Among them, logical time unit refers to only those time units that can be used by SL communication; physical time unit refers to all time units, including time units that can be used by SL communication and time units that cannot be used by SL (such as It is configured as a time unit for downlink transmission, or a time unit occupied by other purposes, etc.).
  • the unit of the time unit is not limited in the embodiment of the present disclosure. For example, it can be a frame, subframe, slot, symbol, etc., or it can be an absolute time unit, such as 1ms (milliseconds). ), 1 ⁇ s (microsecond), etc.
  • the unit of the time unit will be described by taking a slot as an example.
  • the position of the time unit the position of the time unit in the time domain.
  • a time unit is the nth time unit, and the position of the time unit can be understood as the nth time unit.
  • the first time unit after the time unit is the nth time unit. n+1 time units.
  • the location of the time unit can also have the meaning corresponding to the actual unit used, that is, the description of the location of the time unit can be converted into a relation with the time unit. The description of the unit.
  • the position of the time unit can be represented by the number of slots; for another example, if the unit of the time unit is an absolute time unit, such as ms (milliseconds), then How many milliseconds can be used to characterize the location of the time unit.
  • User equipment monitoring in a time unit refers to the behavior of the user equipment detecting and receiving a specific direct communication channel or direct signal in the time unit, and/or performing measurement based on the detection and reception results.
  • the user equipment monitors in a time unit, which may include the NR V2x user equipment blindly detecting the PSCCH (Physical Sidelink Control Channel) channel, and performing signal strength corresponding Measurement.
  • PSCCH Physical Sidelink Control Channel
  • FIG. 1 shows a schematic flow chart of a method for resource selection in direct communication provided by an embodiment of the present disclosure.
  • the method may be specifically executed by a direct communication device, and specifically executed by a user equipment at the sending end, such as in direct communication.
  • this method can be applied to fields including, but not limited to, public safety, commercial use, and so on.
  • the method may include:
  • Step S110 Determine at least one first time unit that satisfies the monitoring condition from the time unit set corresponding to the resource used for direct communication; wherein, the time unit set includes one or more first time units;
  • Step S120 Determine a resource for transmitting the data to be sent according to the resource corresponding to the at least one first time unit that satisfies the monitoring condition.
  • the resource selection in the embodiment of the present disclosure includes resource primary selection or resource reselection, that is, the data to be sent may be initial transmission data or retransmission data.
  • the specific form of “resources” in the embodiments of the present disclosure is not limited in the embodiments of the present disclosure, and may refer to one or more of time domain resources, frequency domain resources, code domain resources, and the like.
  • the resource used for direct communication may refer to the resource allocated to the user equipment for direct communication, or it may refer to the resource allocated to the user equipment for direct communication.
  • the at least one first time unit that satisfies the monitoring condition may be one first time unit or multiple first time units in the time unit set.
  • the foregoing monitoring condition is a condition for determining the time unit corresponding to the candidate resource that can be used to transmit the data to be sent.
  • the monitoring condition is a condition for determining which resource corresponding to the time unit or time units can be used as candidate resources for the data transmission to be sent when the user equipment at the sending end needs to select a resource, and the user equipment can determine according to the monitoring condition At least one first time unit corresponding to the candidate resources is selected as a candidate resource for transmitting the data to be sent.
  • the name of the monitoring condition is only a schematic name, and other names can also be substituted, which is not limited in the embodiment of the present disclosure.
  • the user equipment can quickly determine at least one first time unit according to the listening condition before sending the direct communication data, so that the first time unit that satisfies the listening condition can be determined from the first time.
  • the resource selection is made from the resources corresponding to the unit. Based on this method, even if other user equipment makes aperiodic resource reservations, the user equipment at the sending end can conveniently and quickly select the resources that it can use according to the monitoring conditions for data transmission, and is consistent with the existing Compared with the technology, it does not increase the energy consumption of the equipment and better meets the communication needs.
  • the resources corresponding to the first time units that meet the monitoring conditions may be one or more. Therefore, one or more resources can be determined from these resources. Multiple resources are used to transmit data to be sent.
  • the present disclosure before determining at least one first time unit that satisfies the monitoring condition, it may further include:
  • time units at different time positions can correspond to the same or different monitoring conditions. That is to say, the monitoring conditions may include a variety of different configuration methods. Accordingly, before determining at least one first time unit that satisfies the monitoring conditions according to the above-mentioned time unit set, the above-mentioned monitoring conditions may be determined first, and then according to the monitoring conditions, At least one first time unit that meets the monitoring condition is determined from the time unit set.
  • the above-mentioned monitoring condition may be for one first time unit in the time unit set, or it may be multiple first time units.
  • time unit that is, the monitoring condition and the first time unit can be one-to-one or one-to-many.
  • the monitoring condition can correspond to all the first time units, that is, the monitoring unit corresponds to Is a collection of time units containing one or more first time units.
  • the specific configuration method is not limited in the embodiment of the present disclosure.
  • the method further includes:
  • the monitoring condition may be determined according to the time interval between the at least one first time unit and the time when the resource selection is performed.
  • the monitoring condition may have a corresponding relationship with the above-mentioned time interval.
  • time granularity corresponding to the “time” in the above resource selection time and the time granularity of the time unit may be the same or different.
  • the moment of resource selection may refer to the slot for resource selection, or the symbol for resource selection.
  • the moment of resource selection will be described by taking the time unit of resource selection as an example.
  • the method includes:
  • the monitoring condition includes a minimum monitoring time before the time of resource selection.
  • the time unit set is an empty set;
  • the monitoring condition includes: The time unit of the second duration threshold is monitored.
  • the monitoring condition can be for a first time unit, or can be for a time unit set containing one or more first time units.
  • the monitoring condition is for a time unit, specifically, for a time unit, if the time interval between the time unit and the moment of resource selection is greater than or equal to the first duration threshold, the user equipment before the resource selection Channel monitoring (that is, sensing) can be performed, or channel monitoring is not performed. Regardless of whether monitoring is performed or not, the resources on this time unit can be used as candidate resources for user equipment to send data.
  • whether the user equipment is monitoring It can be determined by the user equipment itself, such as determining whether to monitor according to the current status of the user equipment, such as the current power of the device, the available storage space of the device, etc., or whether to monitor according to the instructions obtained from the base station, and how to monitor.
  • the user equipment can only perform channel monitoring for a time unit not less than the second duration threshold before the resource selection moment, and this time unit Only the above resources can be used as candidate resources for the user equipment to send data.
  • the specific monitoring time may be determined by the user equipment itself, or may be determined according to an instruction obtained from the base station. In this manner, the second duration threshold corresponding to each first time unit may be the same or different.
  • the first time unit located after the first time unit can be directly determined as the first time unit that satisfies the listening condition.
  • the monitoring condition is for a set of time units
  • the set contains multiple first time units, and the time interval between the existing one of the multiple first time units and the moment of resource selection is not less than the first time unit
  • the time unit of the duration threshold, and there are time units whose time interval between the time when the resource selection is performed is less than the first duration threshold, and the above-mentioned monitoring condition may include that the minimum time unit set for monitoring before the time when the resource selection is performed is
  • the empty set also includes monitoring time units that are not less than the second duration threshold before the time when the resource is selected.
  • the monitoring condition is that the time before the time when the resource is selected
  • the time unit that is not less than the second duration threshold is monitored, that is, the intersection of various monitoring conditions.
  • the first time unit that meets the monitoring condition is determined
  • the time unit may be the first time unit that satisfies the above intersection.
  • the user equipment at the transmitting end may or may not perform channel monitoring before performing resource selection, and the candidate resources corresponding to monitoring and non-monitoring may be different. If the user equipment does not perform monitoring, the at least one first time unit that meets the monitoring condition includes each time unit whose time interval from the time when the resource selection is performed is greater than or equal to the first duration threshold. If monitoring is performed, the monitoring is satisfied The at least one first time unit of the condition may include a time unit whose time interval from the time when the resource selection is performed is less than or equal to the first time length threshold.
  • the specific values of the first duration threshold and the second duration threshold are not limited in the embodiment of the present disclosure. If it can be pre-configured, it can also be determined by the user equipment according to certain pre-configuration rules. As an optional solution, the value of the first duration threshold may be the maximum time interval allowed for aperiodic resource reservation in direct communication, such as the existing 32 slots.
  • the foregoing time interval should be shorter than the PDB of the data to be sent, that is, the resource corresponding to at least one first time unit that meets the monitoring condition should be a resource that meets the delay requirement of the data to be sent.
  • the n+W-1th And subsequent time units that meet the PDB requirements of the data to be sent ([n+W-1,PDB) as shown in the figure, since the time interval with slot n is not less than W time units, these time units correspond
  • the monitoring conditions include that the minimum time unit set for monitoring before the time of resource selection is an empty set, that is, whether to perform monitoring on the time unit before the slot, these time units can be the first that meets the monitoring condition Time unit.
  • the corresponding monitoring conditions include the detection of the time before the resource selection time is not less than the second The time unit of the duration threshold is monitored. Therefore, only the time unit that is not less than the second duration threshold before the time of resource selection is monitored, and these are the first time units that meet the monitoring condition.
  • the resource selection method may further include:
  • the second duration threshold is determined.
  • the minimum duration (ie, the second duration threshold) that needs to be monitored may correspond to the time interval.
  • the second duration threshold can be for each first time unit, or for a time unit set containing one or more first time units (all units of the first time correspond to One and the same second duration threshold).
  • the time unit set corresponds to a second duration threshold, it may be based on that the condition (such as the minimum) is satisfied in each time interval between each first time unit in the time unit set and the time when the resource selection is performed Determine the second duration threshold.
  • the specific implementation manner of determining the second duration threshold according to the time interval is not limited in the embodiment of the present disclosure.
  • it may be determined according to a time interval and a corresponding relationship, and the corresponding relationship may be a corresponding relationship between one or more time intervals (or duration ranges) and the corresponding second duration thresholds of each time interval (or duration range), for example , Taking the correspondence relationship between the duration range and the second duration threshold corresponding to the duration range as an example, for a time unit, after determining the time interval between the time unit and the moment of resource selection, according to the duration of the time interval The range and the corresponding relationship can determine a second duration threshold.
  • the relationship between the time interval and the second duration threshold may be that the sum of the time interval and the second threshold is not less than the first duration threshold. If the sum of the two is equal to the first duration threshold, it may be time The larger the interval, the smaller the second duration threshold.
  • the second time interval can be determined according to the time interval and the first duration threshold. Take the n+WX-1(X ⁇ 1)th time unit as an example, The time interval between it and slot n is WX time units, and the second duration threshold is the first duration threshold minus the time interval, which is X time units.
  • the n+WX-1 time unit is the time unit that meets the monitoring conditions
  • the n+WX-2 time unit if the user equipment continuously monitors X time units before slot n , Then the n+WX-2th time unit is the time unit that does not meet the monitoring condition. That is to say, in this example, if the user equipment only continuously monitors for X time units before slot n, the time unit located after the n+WX-2 time unit is the second unit that satisfies the monitoring condition, that is, The time position shown in the figure is in each time unit in the range of [n+WX-1, PDB).
  • the method may further include:
  • the monitoring condition may at least include that the minimum time unit set for monitoring before the resource selection moment is an empty set.
  • the value of the third duration threshold is not limited in the embodiment of the present disclosure.
  • the sending end user equipment is performing resource Before selecting, you can monitor the channel or not. For example, the user equipment can determine whether to monitor according to the current state of the device.
  • the method further includes
  • the third duration threshold is determined according to the data priority of the data to be sent.
  • the first indication information may be direct indication information for a duration threshold, or explicit indication information, such as directly indicating a duration threshold, or implicit indication information, such as an indication identifier corresponding to a duration threshold. (Such as an indicator value), the user equipment can determine a duration threshold according to the identifier.
  • the first indication information may also be an indication of a mapping relationship. After the user recognizes that the mapping relationship is received, the third duration threshold may be determined based on the mapping relationship.
  • the mapping relationship may be the corresponding relationship between each index value of a certain parameter or certain parameter and the corresponding duration threshold value of each index value, where one or some of the above-mentioned parameters may be the device parameters of the user equipment, such as the device parameters. Power, available memory, etc., can also be parameters of the data to be sent, such as the data priority of the data to be sent.
  • the base station may send the first indication information to the user equipment through high-layer signaling or other methods.
  • determining the third duration threshold according to the data priority of the data to be sent includes:
  • the third duration threshold is determined according to the data priority of the data to be sent and the first mapping relationship between the data priority and the third duration threshold.
  • the first mapping relationship may be pre-configured, that is, pre-agreed, or sent by the base station to the user equipment, and the user equipment may according to the data priority of the data to be sent and the mapping relationship,
  • the third duration threshold corresponding to the data priority of the data to be sent is determined.
  • the above-mentioned first mapping relationship may be pre-configured.
  • the user equipment determines the third duration threshold, if the above-mentioned first indication information sent by the base station is received, the user equipment may determine based on the indication information.
  • the third duration threshold, or a third duration threshold is determined according to the indication information, and a third duration threshold is also determined according to the mapping relationship and the data priority of the data to be sent, and the larger of the two duration thresholds is selected here Or a smaller duration threshold is used as the third duration threshold; if the user equipment does not obtain the above-mentioned first indication information from the base station, the user equipment may determine the third duration threshold according to the pre-configured mapping relationship.
  • it further includes:
  • the minimum length of time that the user equipment needs to monitor the channel can be limited. Based on this solution, it can be stipulated that the user equipment determines whether it needs to be monitored based on other information before making resource selection, it needs to be monitored in a time unit not less than the minimum time length, or the user equipment is only monitoring When the monitoring time is not less than the minimum time length, when it is determined that the monitoring is not to be performed, the monitoring may not be performed. That is to say, the minimum time length may only be a limited condition when the user equipment is monitored, or it may be a general limited condition before resource selection is performed on the user equipment.
  • determining the minimum length of time that needs to be monitored includes:
  • the minimum length of time is determined according to the data priority of the data to be sent.
  • the second indication information can be indication information for the minimum length of time (displayed or implicit indication information), or indication information of a mapping relationship, if it is
  • the indication information of the mapping relationship for example, can be the corresponding relationship between multiple data priorities and the time length corresponding to each data priority (it can be a one-to-one relationship or a many-to-one relationship), then the user
  • the device may determine a time length according to the mapping relationship and the index value of one or more parameters corresponding to the device, and the time length is the aforementioned minimum time length.
  • determining the minimum time length according to the data priority of the data to be sent includes:
  • the minimum time length is determined according to the priority of the data to be sent and the second mapping relationship between the priority of the data and the corresponding minimum time length.
  • the second mapping relationship may be received by the user equipment from the base station, for example, the base station sends to the user equipment through high-level signaling, for example, the base station indicates to the user equipment through RRC signaling or other dynamic control signaling, or it may be Pre-configured.
  • different minimum time lengths can be corresponded to the data to be sent with different priorities. For example, as an optional method, the higher the priority of the data to be sent, the shorter the corresponding minimum length of time. For higher-priority transmissions, other direct communication user equipment can try to avoid the high priority when selecting resources. Level transmission collides, or when a collision is found, resources are reselected to avoid high-priority transmissions, so a relatively short listening time can be selected; accordingly, for the transmission of data to be sent with a lower priority, you can Choose a relatively long listening time to reduce the possibility of collisions. As another optional manner, the higher the priority of the data to be sent, the corresponding minimum length of time may be relatively longer, so that when transmitting high-priority data, the user equipment may select a resource with a relatively smaller delay.
  • the second mapping relationship may be pre-configured.
  • the minimum time length may be determined according to the indication information, or one may be determined according to the indication information.
  • the minimum time length, a minimum time length is determined according to the data priority and the second mapping relationship, and a smaller or larger value is selected from the determined two minimum time lengths as the final minimum time length; if the user equipment is not from the base station
  • the minimum time length may be determined according to the data priority of the data to be sent and the second pre-configured mapping relationship.
  • the method may further include:
  • the channel used to transmit the data to be sent is monitored.
  • the trigger condition for the user equipment to start monitoring may be due to the arrival of new data, that is, when there is data to be transmitted, when there is no data to be transmitted to be transmitted, channel monitoring may not be performed, and when there is new data to be transmitted, If there are no available resources, the user equipment starts to monitor.
  • FIG. 2 shows a schematic flowchart of a method for resource selection in direct communication provided by another optional embodiment of the present disclosure.
  • the method may be specifically executed by the user equipment at the sending end. As shown in FIG. 2, the method It can include the following steps:
  • Step S210 Determine at least one time unit corresponding to the candidate resource according to the monitoring mode
  • Step S220 According to the determined resource corresponding to at least one time unit, determine the resource used to transmit the data to be sent.
  • user equipment In direct communication, user equipment (such as mobile phones) needs to determine the resources that can be used for data transmission before data transmission, that is, candidate resources, and select the candidate resources randomly or according to certain rules to use in data transmission. H.
  • the time position of the time unit where the candidate resource is located should be after the time when the resource selection is performed (refer to the description of "time” in the optional embodiment above), it can be based on the time when the resource selection is performed.
  • Determine at least one time unit corresponding to the candidate resource For example, only the PDB of the data to be sent can be considered, and the resource corresponding to at least one time unit that meets the data transmission delay requirement after the resource selection time is the latest as the candidate resource , Select the resource used to transmit data from the corresponding resources on these time units, that is, the time unit set containing these time units can be used as the set of time units where the optional resources are located, and the time units in the set correspond to Resources can be directly connected to optional resources for transmission.
  • a small rectangle corresponds to a slot.
  • the PDB after slot n that meets the PDB requirements of the data to be sent that is, the PDB that meets the data to be sent after the time to (Required) resources corresponding to each time unit can be used as candidate resources, that is, the candidate resource in this example is the resource corresponding to the time unit within the range of [n+1, n+1+PDW).
  • PDW represents the number of time units corresponding to the PDB of the data to be sent.
  • the specific method for transmitting the data to be sent is determined from the candidate resources, which is not limited in the embodiment of the present disclosure. For example, it may be selected randomly from the candidate resources or selected according to certain rules. For example, the R16 sidelink resource selection method can be reused for resource selection.
  • the foregoing monitoring mode includes not performing monitoring before performing resource selection or performing monitoring before performing resource selection.
  • one is the monitoring mode, and the other is the non-monitoring mode.
  • the name of the listening mode is not limited in the embodiment of the present disclosure.
  • determining at least one time unit corresponding to the candidate resource according to the listening mode may include:
  • At least one time unit corresponding to the candidate resource is determined according to the duration of the time unit for monitoring and the time when the resource selection is performed.
  • two modes for determining candidate resources can be provided.
  • One is the candidate resource determination mode in which the user equipment does not perform monitoring before the resource selection, and the other is the candidate resource determination mode in which the user performs monitoring before the resource selection.
  • the specific monitoring mode selected by the user equipment is not limited in the embodiment of the present disclosure.
  • the user equipment can determine the specific method by itself or according to the instructions of the base station. For example, the user equipment can determine the specific method according to the current state of the device (such as power), the priority of the data to be sent, or other factors. Which way to use.
  • determining at least one time unit after the time when the resource selection is performed as the time unit corresponding to the candidate resource includes:
  • At least one time unit located after the time when the resource selection is performed and the time interval between the time when the resource selection is performed is not less than the fourth duration threshold is determined as each time unit corresponding to the candidate resource.
  • an alternative method can be to directly determine the time unit that meets the PDB requirements of the data to be sent after the time of resource selection as the time unit where the candidate resource is located, that is, the time unit located in the resource selection.
  • the resources corresponding to the time unit after the selected time can all be used as candidate resources.
  • the user equipment does not need to monitor, and it can be assumed that all candidate resources are not reserved by other user equipment, so that the resource for direct communication data transmission can be directly selected from the candidate resources, such as randomly or according to the candidate resources.
  • Certain rules are selected, for example, the resource selection method of R16 sidelink can be reused for resource selection.
  • the time interval between the time after the resource selection and the time when the resource selection is not less than the fourth duration threshold is determined as the time unit corresponding to the candidate resource to reduce or avoid collisions between resources and resources reserved by other user equipment.
  • the duration threshold may be equal to that allowed for the user equipment to perform non-periodical resource reservations in direct communication.
  • the maximum time interval for periodic resource reservation Take 5G V2x communication as an example. From the previous description, it can be seen that when a user equipment performs aperiodic resource reservation, each current transmission can be anywhere in the future W time units. That is to say, when the user equipment selects resources, the latest time unit that other user equipment can reserve resources before the selection time is the W-1th time unit after the time unit for resource selection. At this time, the W time units are the maximum time interval that allows aperiodic resource reservation in direct communication. For 5G V2x communication, the maximum time interval is specifically 32 slots.
  • the foregoing fourth duration threshold in the embodiment of the present disclosure may be the foregoing W time units in 5G V2x communication, or may be other duration thresholds agreed by the protocol, or may be sent by the user equipment according to the base station. Indicates the one-time threshold determined by the information. For the convenience of description, the following description of some optional embodiments will take the maximum time interval of W time units as an example for description.
  • the user equipment may not perform monitoring before selecting the resource, that is, it may directly select the resource to reduce the energy consumption due to monitoring, but it limits the resources corresponding to the user equipment that can be selected.
  • Time location The user equipment can only select resources after W-1 time units (based on the time unit for resource selection). For example, using the concept of resource selection window, the starting position of the resource selection window is postponed to at least W-1 time unit later, that is, if the user performs resource selection in time unit n (the nth time unit) For selection, the starting position of the resource selection window is no earlier than time unit n+W-1 (including time unit n+W-1).
  • the current user equipment performs resource selection at time t0 (in the nth slot, that is, slot n shown in the figure).
  • the maximum time interval for aperiodic resource reservation before n is W time units (in this example, 32 slots are used as an example).
  • W time units in this example, 32 slots are used as an example.
  • other user equipment is at t0-1 before time to.
  • the latest time unit that the user equipment can reserve is the n+w-2th time unit (slot n+W in the figure) -2), that is, it is impossible to reserve the resources corresponding to the time unit after the n+W-2 time unit in the aperiodic resource reservation before slot n, and the resource currently selected by the user equipment is located in the nth time unit.
  • the resources corresponding to the time units after +W-2 time units can avoid collisions with reserved resources. That is to say, in this example, resource selection can be made from the resources corresponding to the time unit within the range of [n+W-1, PDW). As shown in the figure, the resource corresponding to the n+Wth time unit can be selected (Figure Selected resources shown in) for data transmission.
  • the specific manner of determining the duration of the time unit for monitoring before the moment of resource selection is not limited in the embodiment of the present disclosure.
  • the user equipment may be determined according to one or more of factors such as base station configuration, protocol agreement, or the user equipment's own capabilities.
  • the duration of the user equipment's inter-monitoring before resource selection can be less than a set duration, for example, less than the maximum time interval allowed for non-periodical resource reservation in direct communication, that is, the user is in Before resource selection, monitoring may be performed for a duration of less than W time units.
  • determining the foregoing first duration may include:
  • the duration of the time unit for monitoring is determined.
  • the duration of the time unit for monitoring should not be less than the minimum duration.
  • the minimum time length reference can be made to the description of the minimum time length in the preceding text.
  • the minimum time length may be pre-configured or indicated by the base station through signaling, such as base station RRC (Radio Resource Control, radio resource control) signaling or other dynamic control signaling. It may also be based on The priority of the data to be sent is determined.
  • the user equipment when the user equipment performs sensing according to the foregoing minimum time length, it may perform resource sensing with a time length equal to the minimum time length, or may perform resource sensing with a time length greater than the minimum time length.
  • the minimum time length is 10 time units, and the user equipment needs to perform a sensing of at least 10 time units before selecting resources.
  • the specific time length can be determined based on a preset method, or it can also be combined with receiving from the base station.
  • the received indication is determined, or it may also be in other ways.
  • the user equipment may also determine it according to its own capabilities, the priority of the data to be transmitted, and other factors.
  • monitoring is performed before resource selection is performed, and at least one time unit corresponding to the candidate resource is determined according to the duration of the time unit for monitoring and the time when the resource selection is performed, including:
  • At least one time unit that is located after the time when the monitoring is started and whose time interval from the time when the monitoring is started is not less than the fifth duration threshold is determined as the time unit corresponding to the candidate resource.
  • the time granularity of the time at the moment when the monitoring is started and the time granularity of the time unit may be the same or different, and reference may be made to the explanation of the time when the resource selection is performed in the preceding text.
  • the specific value of the fifth duration threshold is not limited in the embodiment of the present disclosure. For example, it may be the same as or different from the fourth duration threshold described above.
  • the user equipment can perform monitoring for a period of time before selecting the resource, and based on the time when the monitoring is started, the time after the time unit and the time when the monitoring is started is not less than the first time.
  • the time unit of the five-hour threshold is determined as the time unit corresponding to the candidate resource.
  • Subsequent resources can be randomly selected from the resources corresponding to these time units or selected according to certain rules for the resources to be sent for data transmission. It is similar to the solution in which at least one time unit after the time when the resource selection is performed and the time interval from the time when the resource selection is performed is not less than the fourth duration threshold determined as the time unit corresponding to the candidate resource is not monitored in the previous article.
  • the user equipment can select resources with a smaller delay.
  • the user equipment selects the resource in the nth time unit, and starts continuous monitoring X time units before the resource selection, that is, the time when the monitoring starts is the nXth time unit, assuming the fifth time period mentioned above
  • the threshold is W time units
  • the user equipment can select a resource located after the WX-2th time unit (take the nth time unit as the starting time unit).
  • the monitoring window is [nX, n-Tproc)
  • the start position of the user's resource selection window should be no earlier than Time unit n+WX-1 (including time unit n+WX-1), where Tproc is the necessary processing time required for the user equipment to obtain the monitoring result.
  • the user equipment monitors for X time units before selecting the resource, that is, the user equipment monitors within [nX, n), and selects the resource at time unit n because it is outside the listening window ( That is, before the time unit nX, in this example, the resource reservation for the nx-1th time unit shown in the figure) can only reserve the resources corresponding to the n+WX-2 time unit at the latest, that is, the latest time unit It is the n+WX-2 time unit (slot n+WX-2 shown in the figure).
  • the range of candidate resources in this example is [n+ WX-1, PDB)
  • the resource corresponding to each time unit within the time range, the resource used for data transmission can be selected from the resources corresponding to these time units.
  • the specific selection method is not limited in the embodiment of the present disclosure. For example, it can be randomly Choose or choose according to certain rules.
  • the user equipment may not perform sensing before resource selection, or may perform sensing for a period of time, regardless of which method is selected, which is similar to existing solutions. In comparison, the user equipment can reduce the monitoring time, so as to meet the energy-saving requirements.
  • the method includes:
  • the channel used to transmit the data to be sent is monitored.
  • the trigger condition for the user equipment to start monitoring may be due to the arrival of new data.
  • the method may further include:
  • the user equipment may choose not to monitor, or to monitor with a shorter duration (that is, less than the sixth duration threshold).
  • the specific value of the sixth duration threshold or the seventh duration threshold described above is not limited in the embodiment of the present disclosure. For example, it may be pre-configured, or may be instructed by the base station to the user equipment.
  • the optional determination method of the sixth duration threshold may refer to the foregoing determination method of the third duration threshold, that is, any optional method of determining the third duration threshold described above may be used to determine the set duration.
  • different fourth duration thresholds can be configured for different types of user equipment. For example, for user equipment in V2P, a relatively short duration threshold can be configured to save power.
  • setting the priority limits the lower limit of the data priority of the data to be sent when the user equipment does not monitor or only monitors for a short period of time. Only when the priority of data transmission is not lower than the lower limit (ie When priority is set), the user equipment may not perform monitoring or perform resource selection that is not based on sufficiently long monitoring.
  • the above-mentioned sixth duration threshold is the requirement that the PDB of the data to be sent must meet when no monitoring is performed or only a relatively short duration of monitoring is performed. Only when this requirement is met, the user equipment can not perform monitoring or perform monitoring that is not based on sufficient duration. Resource selection for monitoring.
  • the sixth duration threshold is W+A time units
  • A is a positive number not less than zero
  • the user is allowed only when PDB ⁇ W+A (that is, W+A time units)
  • the device does not perform monitoring or performs resource selection that is not based on sufficiently long monitoring.
  • A can be a predefined value or a pre-configured value. In practical applications, A can take a value greater than 0. This is mainly because when the PDB only slightly exceeds W time units, when using the solution corresponding to the example in Figure 3 or the solution corresponding to the example in Figure 4 for resource selection , The number of time units that the user equipment can select may be small, which affects the quality of resource selection.
  • the sixth duration threshold may be a fixed value, or may be different values corresponding to different priorities of data to be sent. For example, a higher priority may correspond to a relatively larger duration threshold, such as the value of A described above with a larger configuration, so as to ensure that the user equipment has relatively more candidate resources.
  • the above-mentioned sixth time length threshold Not less than the fourth duration threshold.
  • the sixth duration threshold is not less than The fifth duration threshold.
  • the fourth set duration threshold is W time units
  • the time unit corresponding to the earliest candidate resource whose time interval with the time unit n is not less than the fourth set duration threshold is time unit n+W-2, and the time difference is W-1 time units.
  • the fifth duration threshold is also W time units, as shown in the example shown in Figure 5, the time interval between the resource that can be selected and the resource that starts monitoring will not be less than W. -1 time unit.
  • the time unit that is located after the time of resource selection and the time interval between the time of resource selection is not less than the fourth duration threshold it is determined as the time unit corresponding to the candidate resource .
  • the time unit that is located after the time when the monitoring is started and the time interval between the time when the monitoring is started is not less than the fifth duration threshold is determined as the time unit corresponding to the candidate resource, from the data to the time when the selected resource is reached.
  • the time difference between will not be less than W-1 time units. Both methods need to satisfy that the PDB of the data to be sent is not less than W time units, that is, the sixth duration threshold is not less than the fourth duration threshold, or not less than the fifth duration threshold, then the user equipment can have candidate resources to choose from .
  • the user equipment in the above manner cannot select appropriate resources.
  • the user equipment can perform the following operations:
  • the user equipment can select among the candidate resources that meet the PDB requirements after the time of resource selection. That is to say, for the example in FIG. 4, it can be after the time unit n and before the time unit n+W-1.
  • the selection is made from the resources.
  • the selection can be made from the resources after the time unit n and before the time unit n+Wx-1.
  • the concept of resource selection window if the user equipment selects resources at time t0, assuming that the sixth duration threshold is W time units, if PDB ⁇ W time units, the user equipment can select after t0+Tproc2, and t0 +Resources before PDB, where Tproc2 ⁇ 0 refers to the necessary processing time for data transmission after the user selects the resource.
  • the selected resource may be reserved with other user equipment resources. Collision.
  • the user equipment can also perform a relatively short-duration monitoring.
  • the monitoring duration may correspond to the PDB of the data to be sent, according to the monitoring result , To select resources from resources that meet the delay requirements to avoid or reduce resource collisions between the selected resources and the reserved resources of other user equipment.
  • user equipment can reduce the monitoring time when selecting resources, and accordingly select resources after a certain time interval for data transmission, which can effectively reduce the consumption of directly connected communication user equipment. It can achieve energy-saving effects.
  • This solution is especially suitable for any direct-connected communication equipment in direct communication, especially suitable for direct-connected communication scenarios with better power-saving requirements, such as V2P communication scenarios. .
  • an embodiment of the present disclosure also provides a resource selection device in direct communication. As shown in FIG. 6, the resource selection device 100 The resource determination module 110 and the resource selection module 120 may be included. in:
  • the resource determining module 110 is configured to determine at least one first time unit that satisfies the monitoring condition according to the time unit set corresponding to the resource used for direct communication; wherein, the time unit set includes one or more first time units ;
  • the resource selection module 120 is configured to determine a resource for transmitting data to be sent according to a resource corresponding to at least one first time unit that satisfies the monitoring condition.
  • the resource determining module 110 is further configured to:
  • the monitoring condition is determined according to the time interval between the at least one first time unit and the time when the resource selection is performed.
  • the resource determining module 110 is further configured to:
  • the monitoring condition includes a minimum monitoring time before the time of resource selection.
  • the time unit set is an empty set;
  • the monitoring condition includes: The time unit of the second duration threshold is monitored.
  • the resource determining module 110 is further configured to:
  • the second duration threshold is determined.
  • the resource determining module 110 is further configured to:
  • the monitoring condition at least includes: the minimum time unit set for monitoring before the time of resource selection is an empty set .
  • the resource determining module 110 is further configured to:
  • the third duration threshold is determined according to the data priority of the data to be sent.
  • the resource determining module 110 is configured to determine the third duration threshold according to the data priority of the data to be sent:
  • the third duration threshold is determined according to the data priority of the data to be sent and the first mapping relationship between the data priority and the third duration threshold.
  • the resource determining module 110 is further configured to:
  • the resource determining module 110 is configured to: when determining the minimum length of time for monitoring:
  • the minimum length of time is determined according to the data priority of the data to be sent.
  • the resource determining module 110 is configured to determine the minimum time length according to the data priority of the data to be sent:
  • the minimum time length is determined according to the priority of the data to be sent and the second mapping relationship between the priority of the data and the corresponding minimum time length.
  • the resource determining module 110 is further configured to:
  • the channel used to transmit the data to be sent is monitored.
  • an embodiment of the present disclosure also provides a resource selection device in direct communication. As shown in FIG. 7, the resource selection device 200 The resource determination module 210 and the resource selection module 220 may be included. in:
  • the resource determining module 210 is configured to determine at least one time unit corresponding to the candidate resource according to the monitoring mode
  • the resource selection module 220 is configured to determine a resource for transmitting data to be sent according to the determined resource corresponding to at least one time unit.
  • the foregoing monitoring mode includes not performing monitoring before performing resource selection or performing monitoring before performing resource selection.
  • the resource determining module 210 may be configured to:
  • At least one time unit corresponding to the candidate resource is determined according to the duration of the time unit for monitoring and the time when the resource selection is performed.
  • the resource determining module 210 may be configured to:
  • At least one time unit located after the time when the resource selection is performed and the time interval between the time when the resource selection is performed is not less than the fourth duration threshold is determined as the time unit corresponding to the candidate resource.
  • the resource determining module 210 is further configured to:
  • the duration of the aforementioned time unit for monitoring is determined.
  • the resource determining module 210 may be configured to:
  • At least one time unit located after the time when the monitoring is started and the time interval between the time when the monitoring is started is not less than the fifth duration threshold is determined as the time unit corresponding to the candidate resource.
  • the resource determining module 210 is further configured to:
  • the channel used to transmit the data to be sent is monitored.
  • the resource determining module 210 is further configured to:
  • the device provided in the embodiment of the present disclosure is a device that can execute the method in the embodiment of the present disclosure, based on the method provided in the embodiment of the present disclosure, those skilled in the art can understand the embodiment of the present disclosure.
  • the specific implementation of the device and its various variations, so how the device implements the method in the embodiment of the present disclosure will not be described in detail here.
  • the devices used fall within the scope of the present disclosure.
  • the above-mentioned resource selection apparatus provided in the embodiment of the present disclosure may be specifically implemented as a user equipment.
  • the user equipment includes at least one processor, and the at least one processor may be configured to execute any of the optional embodiments of the present disclosure.
  • the embodiments of the present disclosure also provide an electronic device that includes a memory and a processor, wherein the memory stores a computer program, and the processor is running
  • the computer program stored in the memory can execute the resource selection method provided in any optional embodiment of the present disclosure.
  • the embodiment of the present disclosure also provides a computer-readable storage medium, and the storage medium stores a computer program.
  • the computer program When the computer program is executed by a processor, it can execute the resource selection provided in any optional embodiment of the present disclosure. method.
  • FIG. 8 shows a schematic structural diagram of an electronic device suitable for an embodiment of the present disclosure.
  • the electronic device may be specifically implemented as a direct communication user equipment, such as a smart phone, which may be used to implement any of the present disclosure.
  • a resource selection method provided in an optional embodiment.
  • the electronic device 2000 may mainly include at least one component such as a processor 2001, a memory 2002, a communication interface 2003, an input/output interface 2004, and a power supply component 2005. Among them, each component can be connected and communicated through the bus 2006.
  • the power supply component 2005 is used to provide working power for the electronic device 2000, and the power supply component may include, but is not limited to, a rechargeable battery, a charging interface, a charging protection circuit, and so on.
  • the memory 2002 may be used to store computer programs and the like.
  • the computer programs may include program codes or instructions for implementing the methods shown in the embodiments of the present disclosure when called by the processor 2001, and may also include programs for implementing other functions or services.
  • the memory 2002 can be ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, RAM (Random Access Memory, random access memory) or other types that can store information and instructions
  • the dynamic storage device can also be EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory, CD-ROM) or other optical disk storage, optical disk storage (including compression Optical discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer Any other medium, but not limited to this.
  • the processor 2001 is connected to the memory 2002 through the bus 2006, and implements corresponding functions by calling the application programs stored in the memory 2002.
  • the processor 2001 can be a CPU (Central Processing Unit, central processing unit), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application-specific integrated circuit), and an FPGA (Field Programmable). Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the present disclosure.
  • the processor 2001 may also be a combination that implements computing functions, for example, including one or more microprocessor combinations, DSP and microprocessor combinations, and so on.
  • the communication device 2003 can allow the electronic device 2000 to perform wireless or wired communication with other electronic devices to exchange data.
  • the electronic device 2000 can send direct communication data through the communication device, and can receive data (or instructions, etc.) sent by a base station or other electronic devices.
  • the communication device 2003 may include, but is not limited to, part or all of a receiver, a transmitter, a wired network interface, a wireless network interface, and an antenna.
  • the electronic device 2000 can be connected to required input/output devices, such as external storage devices, charging equipment, etc., through the input/output interface 2004, so that the data in the electronic device 2000 can be stored in other storage devices, or other storage devices.
  • the data in the device is stored in the electronic device 2000.
  • the input/output interface 2004 may be a wired interface or a wireless interface.
  • the bus 2006 for connecting various components may include a path for transferring information between the above-mentioned components.
  • the bus 2006 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus or the like. According to different functions, the bus 2006 can be divided into an address bus, a data bus, and a control bus.
  • the memory 2002 may be used to store application program codes for executing the solutions of the present disclosure, and the processor 2001 controls the execution.
  • the processor 2001 is configured to execute application program codes stored in the memory 2002 to implement the actions of the method or apparatus provided in the embodiments of the present disclosure.

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Abstract

一种直连通信中的资源选择方法、装置、电子设备及存储介质，属于通信技术领域，该方法可以包括：根据用于直连通信的资源对应的时间单元集合，确定满足监听条件的至少一个第一时间单元；其中，时间单元集合中包括一个或多个第一时间单元；根据满足监听条件的第一时间单元对应的资源，确定用于传输待发送数据的资源。基于该方法，能够更好的满足无线通信需求。

Description

直连通信中的资源选择方法、装置、电子设备及存储介质 技术领域
本公开涉及通信技术领域，具体而言，本公开涉及一种直连通信中的资源选择方法、装置、电子设备及存储介质。
背景技术
新一代的新型互联网应用的不断涌现对于无线通信技术提出了更高的要求，驱使无线通信技术的不断演进以满足应用的需求。
车联网V2x(vehicle-to-everything，车与万物之间)通信是实现车路协同、解决道路交通安全问题的重要技术手段。V2x包括V2V(vehicle-to-vehicle，车载设备间)通信、V2I(vehicle-to-infrastructure，车载设备和基础设施间)通信、以及V2P(vehicle-to-pedestrian，车载设备和行人间)通信。通过支持V2V，V2I，V2P，车联网可以有效提升交通安全，改善交通效率以及丰富人们的出行体验。利用现有的蜂窝通信技术支持车联网通信可以有效利用现有基站部署，减少设备开销，也更有利于提供具有QoS(Quality of Service，服务质量)保证的服务，满足车联网业务的需求。因此，在LTE Rel-14/15(Long Term Evolution Release 14/15，长期演进通信标准版本14/15)中提供了蜂窝网络对于车联网V2x通信的支持，即C-V2x(cellular based V2x，基于蜂窝网的V2x)。
在C-V2x中车载设备和其他设备之间的通信可以通过基站以及核心网进行中转，即利用原有蜂窝网络中终端设备和基站之间的通信链路进行UL/DL(uplink/downlink,下行链路/上行链路)通信，也可以直接通过设备之间的直连链路进行sidelink(SL，旁路/直连/副链路)通信。与Uu接口(用户设备与无线接入网之间的接口)通信相比，sidelink通信具有时延短，开销小等特点，非常适合用于车载设备和地理位置接近的其他周边设备直接的通信。
随着新一代5G(5th-Generation，第五代)移动通信技术的发展，在 3GPP Rel-16中利用5G NR(New Radio，新空口)技术实现了对新的V2x通信服务和场景的支持，如车队管理(Vehicles Platooning)、感知扩展(Extended Sensors)、先进驾驶(Advanced Driving)、以及远程驾驶(remote driving)等。总体来说，5G V2x sidelink能够提供更高的通信速率，更短的通信延时，更可靠的通信质量。但是，当前的5G V2x技术主要考虑车载终端之间的通信，对于手持终端等终端形态的需求(例如节电)考虑不多。
发明内容
本公开的目的旨在更好的满足通信需求，至少解决现有技术中所存在的技术缺陷之一。
第一方面，本公开实施例提供了一种直连通信中的资源选择方法，该方法包括：
根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，时间单元集合中包括一个或多个第一时间单元；
根据满足监听条件的至少一个第一时间单元对应的资源，确定用于传输待发送数据的资源。
第二方面，本公开实施例提供了一种直连通信中的资源选择装置，该装置包括：
资源确定模块，被配置为根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，时间单元集合中包括一个或多个第一时间单元；
资源选择模块，被配置为根据满足监听条件的至少一个第一时间单元，确定用于传输待发送数据的资源。
第三方面，本公开实施例提供了一种直连通信中的资源选择方法，该方法包括：
根据监听模式，确定候选资源对应的至少一个时间单元；
根据确定出的至少一个时间单元对应的资源，确定用于传输待发送数据的资源。
第三方面的一种可选实施方式中，上述监听模式包括在进行资源选择之前不进行监听或在进行资源选择之前进行监听。
第三方面的一种可选实施方式中，根据监听模式，确定候选资源所对应的至少一个时间单元，包括：
响应于在进行资源选择之前不进行监听，将位于进行资源选择的时刻之后的至少一个时间单元，确定为候选资源对应的时间单元；
响应于在进行资源选择之前进行监听，根据进行监听的时间单元的时长、以及进行资源选择的时刻，确定候选资源对应的至少一个时间单元。
第三方面的一种可选实施方式中，将位于进行资源选择的时刻之后的至少一个时间单元，确定为候选资源对应的时间单元，包括：
将位于进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的至少一个时间单元，确定为候选资源对应的时间单元。
第三方面的一种可选实施方式中，还包括：
根据监听的最小时间长度，确定上述进行监听的时间单元的时长。
第三方面的一种可选实施方式中，根据进行监听的时间单元的时长、以及进行资源选择的时刻，确定候选资源对应的至少一个时间单元，包括：
根据进行资源选择的时刻、以及进行监听的时间单元的时长，确定开始进行监听的时刻；
将位于开始进行监听的时刻之后的、且与开始进行监听的时刻的时间间隔不小于第五时长阈值的至少一个时间单元，确定为候选资源对应的时间单元。
第三方面的一种可选实施方式中，还包括：
响应于确定待发送数据，对用于传输待发送数据的信道进行监听。
第三方面的一种可选实施方式中，还包括：
响应于待发送数据的数据优先级不小于设定优先级，和/或，待发送数据的PDB(数据包时延预算，Packet Delay Budget)不大于第六时长阈值时，在进行资源选择之前不进行监听，或者在进行资源选择之前进行小于第七时长阈值的监听。
第四方面，本公开实施例提供了一种直连通信中的资源选择装置，该装置包括：
资源确定模块，被配置为根据监听模式，确定候选资源对应的至少一个时间单元；
资源选择模块，被配置为根据确定出的至少一个时间单元对应的资源，确定用于传输待发送数据的资源。
第五方面，本公开实施例提供了一种电子设备，该电子设备包括存储器和处理器；其中，存储器中存储有计算机程序，处理器用于在运行该计算机程序时执行本公开第一方面或第三方面的任一可选实施例中所提供的资源选择方法。
第六方面，本公开实施例提供了一种计算机可读存储介质，该存储介质中存储有计算机程序，该计算机程序在被处理器执行时用于执行本公开第一方面或第三方面的任一可选实施方式中所提供的资源选择方法。
本公开实施例提供的技术方案所带来的有益效果将在下文的具体实施方式描述中，结合具体的可选实施例进行详细描述，在此不再说明。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对本公开实施例描述中所需要使用的附图作简单地介绍。
图1示出了本公开一可选实施例提供的一种直连通信中的资源选择方法的流程示意图；
图2示出了本公开另一可选实施例提供的一种直连通信中的资源选择方法的流程示意图；
图3示出了本公开一示例中提供的一种确定可选资源的原理示意图；
图4示出了本公开另一示例中提供的一种确定可选资源的原理示意图；
图5示出了本公开又一示例中提供的一种确定可选资源的原理示意图；
图6示出了本公开一可选实施例提供的一种直连通信中的资源选择装置的结构示意图；
图7示出了本公开一可选实施例提供的一种直连通信中的资源选择装置的结构示意图
图8示出了本公开实施例所适用的一种电子设备的结构示意图。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能解释为对本公开的限制。
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本公开的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本公开所属领域中的普通技术人员的一般理解相同的意义。这里所使用的“用户设备”、“终端”、“终端设备”既包括无线信号接收器的设备，其仅具备无发射能力的无线信号接收器的设备，又包括接收和发射硬件的设备，其具有能够在双向通信链路上，进行双向通信的接收和发射硬件的设备。这种设备可以包括：蜂窝或其他通信设备，其具有单线路显示器或多线路显示器或没有多线路显示器的蜂窝或其他通信设备；PCS(Personal Communications Service，个人通信系统)，其可以组合语音、数据处理、传真和/或数据通信能力；PDA(Personal Digital Assistant，个人数字助理)，其可以包括射频接收器、寻呼机、互联网/内联网访问、网络浏览器、记事本、日历和/或GPS(Global Positioning System，全球定位系统)接收器；常规膝上型和/或掌上型计算机或其他设备，其具有和/或包括射频接收器的常规膝上型和/或掌上型计算机或其他设备。这里所使用的“终端”、“终端设备”、“用户设备”可以是便携式、可运输、安装在交通工具(航空、海运和/或陆地)中的，或者适合于和/或配置为在本地运行，和/或以分布形式，运行在地球和/或空间的任何其他位置运行。这里所使用的“终端”、 “终端设备”、“用户设备”还可以是通信终端、上网终端、音乐/视频播放终端，例如可以是PDA、MID(Mobile Internet Device，移动互联网设备)和/或具有音乐/视频播放功能的移动电话，也可以是智能电视、机顶盒等设备。
在LTE V2x直连通信中支持用户(即直连通信设备，也可以称为用户设备)自主进行时间频率资源(可简称为时频资源)选择以发送直连数据。当用户使用自主资源选择的模式时，采用资源预留和基于信道监听(sensing)的资源选择方法。每个用户设备周期性的在当前传输时对下一周期的传输资源进行预留。与当前传输所使用的时频资源相比，所预留的资源在时间上间隔一个指定的周期，频率上占用相同的大小和位置。每个用户设备需要不停的在信道上监听其他用户设备发送的预留信息，并根据预留信息以及对应的信道测量结果预测未来时间频率资源上的干扰。用户设备会尽量选择干扰较小的时间频率资源进行数据发送。
用户设备不停的进行信道监听会耗费大量的电量。因此，在LTE V2x中引入了“部分监听(partial sensing)”的概念以(主要是帮助手持终端)获得节电的效果。由于在LTE V2x中进行资源预留的周期取值是属于一个有限集合(例如{100,200，…，1000}ms的集合)的，对于给定时间单元上的时频资源来说，能够预留该时频资源的传输出现的时间位置也是属于一个有限集合(例如该时间单元之前的{100,200,300，…，1000}ms的时间单元集合)的。因此，给定一段时间位置(例如K个时间单元)，用户设备可以只监听之前部分时间单元内的直连传输，例如，只监听K个时间单元之前的{100,200，…，1000}ms的对应的K个时间单元，就可以不遗漏所有对这段时间位置上的时频资源预留。
在LTE V2x中，协议允许用户设备只在一个有限的时间集合上进行资源选择，并保证监听所有可能预留位于该时间集合上时频资源的时间位置。对于其他时间位置，用户设备可以进入节能状态。通过基站配置或者预配置的方式可以对用户设备进行资源选择的有限时间集合的时间单元数目的最小值进行限制，以防止时间集合太小出现没有合适资源可以选择的情况。
在5G V2x中，与LTE V2x不同，5G V2x支持非周期性的资源预留。 每次当前传输可以对未来W个(逻辑)时间单元内的任意位置的最多一个或者两个(由配置或者预配置决定)相同大小的时间频率资源进行预留。5G V2x也支持周期性的资源预留，可以通过配置或者预配置进行使能和去使能。目前，在通信协议中W为固定值，为32个逻辑slot。
在即将开始的Rel-17 sidelink优化讨论中，将会讨论如何基于Rel-16 5G V2x的设计将Sidelink扩展到包括商用(commercial)、公共安全(public safety)等其他应用中。在这些应用中，以及在V2x的V2P应用中，节电都是一个很重要的需求。尤其是对手持终端等设备而言，节电更是尤为重要的要考虑的一个方面。
而由前文描述可知，与LTE V2x不同，5G V2X除了支持周期性的资源预留，还支持非周期性的资源预留。对于非周期性的资源预留，为了满足“部分监听”的要求，即监听所有可能预留待选时间单元上资源的传输所处的时间位置，新的用户设备行为需要定义。另外，用户设备如何在非周期性的资源预留情况下进行节电也是一个重要的需要考虑的问题，尤其是对手持终端等形态的直连通信设备而言。当然，本公开实施例所提供的方案同样也适用于其他任何需要进行直连通信的用户设备。
为了更好的满足通信需求，本公开实施例提供了一种直连通信中的资源选择方法，基于该方法可以有效减少直连通信设备的耗电，实现设备节能的目的。
为了更好的理解本公开实施例所提供的方案，下面首先对本公开所涉及到的相关术语及相关技术进行说明。
时间单元：本公开实施例中的所描述的时间单元，既可以是指逻辑时间单元，也可以是指物理时间单元。其中，逻辑时间单元指只考虑那些能够被SL通信所使用的时间单元；物理时间单元指所有的时间单元，既包括能够被SL通信使用的时间单元，也包括不能被SL使用的时间单元(如被配置为下行传输的时间单元，或者被其他用途占用的时间单元等)。而时间单元的单位本公开实施例不做限定，如可以是帧(frame)、子帧(subframe)、时隙(slot)、符号(symbol)等，也可以是绝对时间单位，如1ms(毫秒)、1μs(微秒)等。在下文实施例的描述中，为了更好的说明本公开所提供的方案，在一些示例中，时间单元的单位会以slot为例 进行说明。
时间单元的位置：时间单元在时域上的位置，例如，一个时间单元为第n个时间单元，该时间单元的位置可以理解为第n个，该时间单元之后的第一个时间单元为第n+1个时间单元。在实际应用中，基于时间单元所采用的单位的不同，时间单元的位置也可以具有对应于实际所采用的单位的含义，也就是说，可以将时间单元的位置的描述转换为与时间单元的单位相对应的描述，例如，假设时间单元的单位为slot，则可以以第几个slot来表示时间单元的位置；再例如，假设时间单元的单位为绝对时间单位，如ms(毫秒)，则可以以第多少毫秒来表征时间单元的位置。
用户设备在一个时间单元内监听：指用户设备对该时间单元内特定的直连通信信道或者直连信号进行检测和接收，和/或根据检测和接收结果进行测量的行为。例如，对于NR V2x直连通信，用户设备在一个时间单元内监听，可以包括NR V2x用户设备对PSCCH(Physical Sidelink Contro lChannel，物理旁路控制信道)信道进行盲检测，并相应的进行信号强度的测量。
为使本公开的目的、技术方案和优点更加清楚，下面将结合具体地实施例和附图对本公开的各可选的实施方式及本公开实施例的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。下面将结合附图，对本公开的实施例进行描述。
图1示出了本公开实施例提供的一种直连通信中的资源选择方法的流程示意图，该方法具体可以由直连通信设备执行，具体由发送端用户设备执行，如直连通信中的移动终端(如用户手机)，该方法可以应用于包括但不限于公共安全、商用等领域。如图1中所示，该方法可以包括：
步骤S110：根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，时间单元集合中包括一个或多个第一时间单元；
步骤S120：根据满足监听条件的至少一个第一时间单元对应的资源，确定用于传输待发送数据的资源。
需要说明的是，本公开实施例中的所记载的“多个”包括两个或两个以 上。本公开实施例中的资源选择包括资源初选或资源重选，也就是说，待发送数据可以是初传数据，也可以是重传数据。本公开实施例中的“资源”的具体形式本公开实施例不做限定，可以是指时域资源、频域资源、码域资源等中的一项或多项。
其中，对于发送端用户设备而言，用于直连通信的资源，可以是指分配给该用户设备的用于直连通信的资源，还可以是指分配给该用户设备的用于直连通信的资源中位于进行资源选择的时刻之后的时间单元所对应的资源。可以理解的是，上述满足监听条件的至少一个第一时间单元，是时间单元集合中满足监听条件的一个或多个第一时间单元。其中，满足监听条件的至少一个第一时间单元，可以为时间单元集合中的一个第一时间单元或多个第一时间单元。
上述监听条件是用于确定能够用于传输待发送数据的候选资源所对应的时间单元的条件。该监听条件为发送端用户设备在需要进行资源选择时，用于确定哪个或哪些时间单元所对应的资源可以作为用于待发送数据传输的候选资源的条件，用户设备可以根据该监听条件来确定出候选资源中对应的至少一个第一时间单元作为用于传输待发送数据的候选资源。
需要说明的是，监听条件的名称只是一个示意性的名称，也可以以其他名称替代，本公开实施例不做限定。
本公开实施例所提供的该资源选择方法，用户设备在进行直连通信数据的发送之前，可以根据监听条件快捷的确定出至少一个第一时间单元，从而可以从这些满足监听条件的第一时间单元对应的资源中进行资源选择。基于该方法，即使是其他用户设备进行了非周期性的资源预留，发送端用户设备也能够根据监听条件方便、快捷的选择出其所能够使用的资源，以进行数据发送，且与现有技术相比，不会增加设备的耗能，更好的满足了通信需求。
在本公开实施例中，满足监听条件的第一时间单元可以为一个或多个，且满足监听条件的第一时间单元对应的资源可以为一个或多个，因此可以从这些资源中确定一个或多个资源，用于传输待发送数据。
本公开的可选实施例中，在确定满足监听条件的至少一个第一时间单元之前，还可以包括：
确定监听条件。
在实际应用中，对于不同时间位置上的时间单元，可以对应相同或者不同的监听条件。也就是说，监听条件可以包括多种不同的配置方式，相应的，在根据上述时间单元集合确定满足监听条件的至少一个第一时间单元之前，可以先确定上述监听条件，然后依据给监听条件，从时间单元集合中确定出符合监听条件的至少一个第一时间单元。
需要说明的是，在实际应用中，在时间单元集合包含多个第一时间单元时，上述监听条件可以是对时间单元集合中的一个第一时间单元而言的，也可以是多个第一时间单元而言的，也就是说，监听条件和第一时间单元可以是一对一的，也可以是一对多的，如监听条件可以是对应于所有第一时间单元的，即监听单元对应的是包含一个或多个第一时间单元的时间单元集合。具体采用哪种配置方式本公开实施例不做限定。
本公开的可选实施例中，该方法还包括：
可以根据至少一个第一时间单元与进行资源选择的时刻之间的时间间隔，确定监听条件。
也就是说，监听条件可以与上述时间间隔具有对应关系。
需要说明的是，上述进行资源选择的时刻中的“时刻”，其所对应的时间粒度与时间单元的时间粒度可以相同，也可以不同。作为一个示例，假设一个时间单元为一个slot，进行资源选择的时刻则可以是指进行资源选择的slot，或者进行资源选择的symbol。为了描述方便，后文的一些示例中，进行资源选择的时刻将以进行资源选择的时间单元为例进行描述。
本公开的可选实施例中，该方法包括：
响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔大于第一时长阈值，或者响应于时间间隔等于第一时长阈值，监听条件包括在进行资源选择的时刻之前进行监听的最小时间单元集合为空集；
响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔小于第一时长阈值，或者响应于时间间隔等于第一时长阈值，监听条件包括对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听。
由前文描述可知，监听条件可以是对一个第一时间单元而言的，也可以是对包含一个或多个第一时间单元的时间单元集合而言的。
在监听条件是对一个时间单元而言时，具体的，对于一个时间单元，如 果该时间单元与进行资源选择的时刻之间的时间间隔大于或等于第一时长阈值，用户设备在进行资源选择之前可以进行信道监听(即sensing)，也可以不进行信道监听，无论进行或者不进行监听，该时间单元上的资源都可以作为用户设备进行数据发送的候选资源，此时，用户设备是否进行监听，可以由用户设备自行确定，如根据用户设备的对当前状态，如设备当前的电量、设备的可用存储空间等确定是否进行监听，也可以根据从基站获取到的指示来确定是否进行监听，以及如何监听。如果一个时间单元与进行资源选择的时刻之间的时间间隔小于或等于第一时长阈值，用户设备只有在资源选择的时刻之前进行了不小于第二时长阈值的时间单元的信道监听，该时间单元上的资源才可以作为用户设备进行数据发送的候选资源。同样的，此时用户设备在进行不小于第二时长阈值的时间单元的信道监听时，具体进行多长时间的监听，可以由用户设备自行确定，也可以根据从基站获取到的指示来确定。该方式中，每个第一时间单元所对应的第二时长阈值可以相同，也可以不同。可选的，如果每个第一时间单元所对应的第二时长阈值相同，此时在根据监听条件确定出最早的满足该条件的第一时间单元之后，位于该第一时间单元之后的第一时间单元则都可以直接确定是满足监听条件的第一时间单元。
在监听条件是对于时间单元集合而言时，如果该集合包含的多个第一时间单元，，且多个第一时间单元中既有与进行资源选择的时刻之间的时间间隔不小于第一时长阈值的时间单元，又有与进行资源选择的时刻之间的时间间隔小于第一时长阈值的时间单元，则上述监听条件可以既包括在进行资源选择的时刻之前进行监听的最小时间单元集合为空集，还包括对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听，也就是说，对于上述时间单元集合而言，监听条件则是对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听，即各种不同监听条件的交集，此时，在从时间单元集合中确定满足监听条件的至少一个第一时间单元时，满足监听条件的第一时间单元则可以是满足上述交集的第一时间单元。
可见，基于该可选方案，发送端用户设备在进行资源选择前可以进行信道监听，也可以不进行监听，进行监听和不进行监听所对应的候选资源可以是不同的。如果用户设备不进行监听，则满足监听条件的至少一个第一时间单元包括与进行资源选择的时刻之间的时间间隔大于或等于第一时长阈值的 各时间单元，如果进行了监听，则满足监听条件的至少一个第一时间单元可以包括与进行资源选择的时刻之间的时间间隔小于或等于第一时长阈值的时间单元。
其中，第一时长阈值和第二时长阈值的具体取值，本公开实施例不做限定。如可以是预配置好的，还可以用户设备按照一定的预配置规则确定。作为一可选方案，第一时长阈值的取值可以为直连通信中允许进行非周期性的资源预留的最大时间间隔，如现有的32个slot。
另外，可以理解的是，上述时间间隔应是小于待发送数据的PDB的，也就是说，满足监听条件的至少一个第一时间单元对应的资源应是满足待发送数据的时延要求的资源。
作为一个示例，如图4中所示，以slot作为时间单元的单位、第一时长阈值为W(W≥1，该示例中W＝32)个slot为例，如中每个小矩形代表一个时间单元，若在时刻to进行资源选择，即进行资源选择的时刻为第n个slot(图中所示的slot n)，对于slot n之后的各时间单元，其中的第n+W-1个及其之后的、且满足待发送数据PDB要求的各时间单元(如中所示的[n+W-1,PDB)，由于与slot n的时间间隔不小于W个时间单元，这些时间单元对应的监听条件则包括在进行资源选择的时刻之前进行监听的最小时间单元集合为空集，也就是说，在slot之前的时间单元上是否进行监听，这些时间单元都可以是满足监听条件的第一时间单元。而对于第n+W-1个之前的各时间单元，由于这些时间单元与slot n的时间间隔小于W个时间单元，对应的监听条件则包括对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听，因此，只有在进行资源选择的时刻之前的不小于第二时长阈值的时间单元上进行了监听，这些才是满足监听条件的第一时间单元。
本公开的可选实施例中，该资源选择方法还可以包括：
根据上述时间间隔，确定第二时长阈值。
也就是说，在上述时间间隔小于或者等于第一时长阈值时，需要进行监听的最小时长(即第二时长阈值)可以与该时间间隔对应。比如，时间间隔越大，第二时长阈值可以越小。由前文描述可知，第二时长阈值可以是对每一个第一时间单元而言的，也可以是对包含一个或多个第一时间单元的时间单元集合而言的(所有第一时间的单元对应一个同一个第二时长阈值)。作为 一可选方案，在时间单元集合对应一个第二时长阈值时，可以是根据该时间单元集合中各第一时间单元与进行资源选择的时刻之间的各时间间隔中满足条件(如最小)的时间间隔，确定第二时长阈值。
其中，根据时间间隔确定第二时长阈值的具体实现方式本公开实施例不做限定。例如，可以根据时间间隔和一对应关系确定，该对应关系可以为一个或多个时间间隔(或者时长范围)与每个时间间隔(或时长范围)各自对应的第二时长阈值的对应关系，例如，以时长范围与时长范围对应的第二时长阈值的对应关系为例，对于一个时间单元，在确定出该时间单元与进行资源选择的时刻之间的时间间隔之后，根据该时间间隔所属的时长范围和该对应关系，即可确定出一个第二时长阈值。
作为另一可选方式，上述时间间隔与第二时长阈值的关系可以是时间间隔与第二阈值之和不小于上述第一时长阈值，如两者之和等于第一时长阈值，即可以是时间间隔越大，第二时长阈值越小。
作为一个示例，如图5中所示，仍以第一时长阈值为W个时间单元为例，假设在时刻to即slot n上进行资源选择，对于时刻to之后的时间单元，如果该时间单元与slot n的之间的时间间隔小于W个时间单元，则可以根据该该时间间隔和第一时长阈值确定第二时间间隔，以第n+W-X-1(X≥1)个时间单元为例，其与slot n的时间间隔为W-X个时间单元，则第二时长阈值为第一时长阈值减去该时间间隔，为X个时间单元，因此，如果用户设备在slot n之前连续进行了X个时间单元的监听，则第n+W-X-1个时间单元为满足监听条件的时间单元，而对于第n+W-X-2个时间单元，如果用户设备在slot n之前连续进行了X个时间单元的监听，则第n+W-X-2个时间单元为不满足监听条件的时间单元。也就是说，该示例中，若用户设备在slot n之前只连续进行了X个时间单元的监听，位于第n+W-X-2个时间单元之后的时间单元为满足监听条件的第二单元，即图中所示的时间位置在[n+W-X-1,PDB)范围的各时间单元。
本公开的可选实施例中，该方法还可以包括：
响应于待发送数据的PDB小于第三时长阈值，或者响应于该PDB等于第三时长阈值，监听条件可以至少包括：在进行资源选择的时刻之前进行监听的最小时间单元集合为空集。
其中，第三时长阈值的取值本公开实施例不做限定。
基于该可选方案，在实际应用中，如果待发送数据的PDB较小(即小于或等于第三时长阈值)，也就是数据的时延要求比较高，此时，发送端用户设备在进行资源选择之前，可以进行信道监听，也可以不进行监听。例如，用户设备可以根据设备的当前状态确定是否进行监听。
本公开的可选实施例中，该方法还包括
根据接收到的第一指示信息，确定第三时长阈值；
和/或，
根据待发送数据的数据优先级确定第三时长阈值。
其中，第一指示信息可以是对于一个时长阈值的直接指示信息，可以是显式的指示信息，如直接指示了一个时长阈值，也可以是隐式的指示信息，如一个时长阈值对应的指示标识(如一个指示值)，用户设备可以根据该标识确定出一个时长阈值。第一指示信息还可以是对一个映射关系的指示，用户识别在接收到该映射关系后，可以基于该映射关系确定出第三时长阈值。例如，该映射关系可以是某个或某些参数的各指标值与各指标值各自对应的时长阈值的对应关系，其中，上述某个或某些参数可以是用户设备的设备参数，如设备的电量、可用内存等，也可以是待发送数据的参数，如待发送数据的数据优先级。
可选的，基站可以通过高层信令或者其他方式向用户设备发送第一指示信息。
本公开的可选实施例中，根据待发送数据的数据优先级确定第三时长阈值，包括：
根据待发送数据的数据优先级、以及数据优先级与第三时长阈值之间的第一映射关系，确定第三时长阈值。
其中，可选的，该第一映射关系可以是预配置好的，即预先协议好的，也可以是基站发送给用户设备的，用户设备可以根据待发送数据的数据优先级和该映射关系，确定出待发送数据的数据优先级所对应的第三时长阈值。
作为另一可选方式，可以预配置有上述第一映射关系，用户设备在确定第三时长阈值时，如果接收到了基站所发送的上述第一指示信息，则用户设备可以基于该指示信息来确定第三时长阈值，或者，根据该指示信息确定一 个第三时长阈值，并根据该映射关系和待发送数据的数据优先级也确定一个第三时长阈值，从这里两个时长阈值中选择一个较大或较小的时长阈值作为所使用的第三时长阈值；如果用户设备未从基站获取到上述第一指示信息，用户设备则可以根据预配的该映射关系，确定第三时长阈值。
本公开的可选实施例中，还包括：
确定监听的最小时间长度。
该可选方案中，可以对用户设备所需要进行信道监听的最小时间长度进行限定。基于该方案，可以规定用户设备在进行资源选择之前，基于其他信息确定出不论是否需要监听，都需要进行在不小于该最小时间长度的时间单元上进行监听，也可以是用户设备只有在进行监听时，监听的时间长度不小于该最小时间长度，在确定出不进行监听时，可以不进行监听。也就是说，该最小时间长度可以只是对用户设备进行监听时的限定条件，也可以是对用户设备进行资源选择前的通用的限定条件。
本公开的可选实施例中，确定需要进行监听的最小时间长度，包括：
根据接收到的第二指示信息，确定最小时间长度；
和/或，
根据待发送数据的数据优先级确定最小时间长度。
其中，与前文中第一指示信息的原理相同，该第二指示信息可以是对于最小时间长度的指示信息(显示的或隐式的指示信息)，也可以是一个映射关系的指示信息，如果是映射关系的指示信息，例如，可以是多个数据优先级和每个数据优先级各自对应的时间长度的对应关系(可以是一对一的关系，也可以是多对一的关系)，则用户设备可以根据该映射关系和该设备对应的一个或多个参数的指标值，确定出一个时间长度，该时间长度即为上述最小时间长度。
本公开的可选实施例中，根据待发送数据的数据优先级确定最小时间长度，包括：
根据待发送数据的优先级、以及数据的优先级与对应的最小时间长度的第二映射关系，确定最小时间长度。
其中，该第二映射关系可以是用户设备从基站接收到的，如基站通过高层信令发送给用户设备的，如基站通过RRC信令或者其他动态控制信令指示 给用户设备的，也可以是预配置的。
基于该可选方案，对于不同优先级的待发送数据，可以对应不同的最小时间长度。例如，作为一可选方式，待发送数据的优先级越高，对应的最小时间长度可以越短，对于优先级较高的传输，其他直连通信用户设备可以在资源选择时尽量避免与高优先级传输发生碰撞，或者当发现会出现碰撞时会重新选择资源避开高优先级的传输，因此可以选择相对较短的监听时间；相应的，对于优先级较低的待发送数据的传输，可以选择相对较长的监听时间以减少碰撞的可能性。作为另一可选方式，待发送数据的优先级越高，对应的最小时间长度可以相对较长，从而在进行高优先级数据的传输时，用户设备可以选择时延相对更小的资源。
作为一可选方式，可以预配置有该第二映射关系，此时，如果用户设备从基站接收到了上述第二指示信息，则可以根据该指示信息确定最小时间长度，或者，根据指示信息确定一个最小时间长度，根据数据优先级和第二映射关系确定一个最小时间长度，从确定出的两个最小时间长度中选择一个较小或较大值作为最终的最小时间长度；如果用户设备未从基站接收到第二指示信息，则可以根据待发送数据的数据优先级和预配置的第二映射关系，确定最小时间长度。
本公开的可选实施例中，该方法还可以包括：
响应于确定待发送数据，对用于传输待发送数据的信道进行监听。
也就是说，用户设备开始进行监听的激发条件可以是由于新数据的到达，即有数据需要传输时，在没有待发送数据需要传输时，可以不进行信道监听，当有新数据需要发送时，如果没有可用资源的时候用户设备开始监听。
图2示出了本公开另一可选实施例所提供的一种直连通信中的资源选择方法的流程示意图，该方法具体可以由发送端用户设备执行，如图2中所示，该方法可以包括以下步骤：
步骤S210：根据监听模式，确定候选资源对应的至少一个时间单元；
步骤S220：根据所确定出的至少一个时间单元对应的资源，确定用于传输待发送数据的资源。
在直连通信中，用户设备(如手机)在进行数据传输之前，需要确定能够用于数据传输的资源，即候选资源，并从候选资源中随机或者按照一定的 规则选择在数据传输时所使用的资源。
可选的，由于候选资源所在的时间单元的时间位置应是位于进行资源选择的时刻(可参照前文可选实施例中对“时刻”的说明)之后，因此，可以基于进行资源选择的时刻来确定候选资源对应的至少一个时间单元，例如，可以只考虑待发送数据的PDB，将位于进行资源选择的时刻之后、满足数据传输时延要求最迟的至少一个时间单元所对应的资源作为候选资源，从这些时间单元上对应的资源中选择用于传输数据的资源，也就是可以将包含这些时间单元的时间单元集合作为可选资源所在的时间单元的集合，该集合中的时间单元所对应的资源可以直连传输的可选资源。
作为一示例，以slot作为时间单元的单位、进行资源选择的时刻为进行资源选择的时间单元为例，如图3中所示，图中一个小矩形对应一个slot，假设用户在to时刻(第n个slot内，即图中所示的slot n)进行资源选择，可选的，可以将slot n之后的、满足待发送数据的PDB要求的(也就to时刻之后的满足待发送数据的PDB要求的)各时间单元对应的资源均可以作为候选资源，即该示例中候选资源为位于[n+1，n+1+PDW)范围内的时间单元所对应的资源，其中，该范围内的PDW表示待发送数据的PDB所对应的时间单元的数量。
需要说明的是，在确定出候选资源之后，从候选资源中确定用于传输待发送数据的具体方式，本公开实施例不做限定，如可以是从候选资源随机选择或按照一定的规则选择，例如，可以重用R16 sidelink的资源选择方式进行资源选择。
本公开的可选实施例中，上述监听模式包括在进行资源选择之前不进行监听或在进行资源选择之前进行监听。也就是说，一种是监听模式，另一种是不监听模式。需要说明的是，监听模式的名称本公开实施例不做限定。
下面将对本公开提供的几种确定候选资源的可选实施例进行说明。
本公开的可选实施例中，上述步骤S210中，根据监听模式，确定用于候选资源对应的至少一个时间单元，可以包括：
响应于在进行资源选择之前不进行监听，将位于进行资源选择的时刻之后的至少一个时间单元，确定为候选资源对应的时间单元；
响应于在进行资源选择之前进行监听，根据进行监听的时间单元的时长、 以及进行资源选择的时刻，确定候选资源对应的至少一个时间单元。
也就是说，本公开的方案中，可以提供两种确定候选资源的模式。一种是在用户设备在进行资源选择之前不进行监听的候选资源确定模式，另一种是用户在进行资源选择前进行监听的候选资源确定模式。其中，用户设备具体选择哪种监听模式，本公开实施例不做限定。用户设备在需要进行数据发送时，可以自行确定或者根据基站的指示确定具体采用哪种方式，例如，用户设备可以根据设备的当前状态(如电量)、待发送数据的优先级、或者其他因素确定采用哪种方式。
本公开的可选实施例中，将位于进行资源选择的时刻之后的至少一个时间单元，确定为候选资源对应的时间单元，包括：
将位于进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的至少一个时间单元，确定为候选资源对应的各时间单元。
对于不进行监听的方案，一种可选方式，可以是直接将进行资源选择的时刻之后的、满足待发送数据的PDB要求的时间单元，确定为候选资源所在的时间单元，也就是位于进行资源选择的时刻之后的时间单元所对应的资源均可以作为候选资源。此时，用户设备可以不进行监听，可以假设所有的候选资源都没有被其他用户设备预留，从而可以从候选资源中直接选择用于直连通信数据传输的资源，如从候选资源随机或按照一定的规则选择，例如，可以重用R16 sidelink的资源选择方式进行资源选择。
在实际应用中，对于位于进行资源选择的时刻之后的时间单元所对应的资源，由于其他用户设备可能在这些资源上进行了资源的预留，如其他用户设备可能在这些资源上进行非周期性的预留，为了尽量避免与其他用户设备的资源碰撞，作为另一可选方式，则可以将位于进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的时间单元，确定为候选资源所对应的时间单元，以减少或避免资源与其他用户设备预留的资源发生碰撞。
其中，上述第四时长阈值的具体取值本公开实施例不做限定。作为一可选方式，例如，为了避免候选所选择的资源与其他用户设备在进行非周期性的资源预留时作预留的资源碰撞，该时长阈值可以等于直连通信中允许用户 设备进行非周期性的资源预留的最大时间间隔，以5G V2x通信为例，由前文描述可知，用户设备在进行非周期性的资源预留时，每次当前传输可以在未来W个时间单元的任意位置的资源进行预留，也就是说，用户设备在进行资源选择时，在该选择时刻之前其他用户设备能够进行资源预留的最迟的时间单元是进行资源选择的时间单元之后的第W-1个时间单元，此时，该W个时间单元即为直连通信中允许进行非周期性的资源预留的最大时间间隔，对于5G V2x通信，该最大时间间隔具体为32个slot。
需要说明的是，本公开实施例中的上述第四时长阈值，可能是5G V2x通信中的上述W个时间单元，也可以是协议约定的其他的时长阈值，还可以是用户设备根据基站发送的指示信息确定的一时长阈值。为了描述方便，下文的一些可选实施例描述中将以最大时间间隔为W个时间单元为例来说明。
对于该可选方案中，用户设备在进行资源选择前，也可以不进行监听，即可以直接进行资源选择，以减少由于监听产生的耗能，但是限制了用户设备所能够选择的资源所对应的时间位置。用户设备只能够选择在W-1个时间单元之后的(以进行资源选择时间单元为基准)资源。例如，使用资源选择窗口(resource selection window)的概念，将资源选择窗口的起始位置至少推迟到W-1个时间单元之后，即用户如果在时间单元n(第n个时间单元)内进行资源选择，资源选择窗口的起始位置不早于时间单元n+W-1(包括时间单元n+W-1)。
作为一示例，以slot作为时间单元的单位为例，如图4中所示，假设当前用户设备在t0时刻(第n个slot内，即图中所示的slot n)进行资源选择，在slot n之前能够进行非周期的资源预留的最大时间间隔为W个时间单元(该示例中以32个slot为例进行)，如图中所示，假设其他用户设备在to时刻之前的t0-1时刻(对应第n-1个时间单元)进行了资源预留，则该用户设备能够预留的最迟的时间单元为第n+w-2个时间单元(图中所示的slot n+W-2)，也就是说，在slot n之前的非周期资源预留不可能预留第n+W-2个时间单元之后的时间单元所对应的资源，当前用用户设备选择的资源位于第n+W-2个时间单元之后(包含第n+W-1个时间单元)的时间单元所对应的资源，就可以避开和已预留的资源的碰撞。即该示例中可以从位于[n+W-1，PDW)范围内的时间单元所对应的资源进行资源选择，如图中所示，可以选 择第n+W个时间单元所对应的资源(图中所示的选择的资源)进行数据传输。
对于进行资源选择之前进行监听的可选方案中，确定在进行资源选择的时刻之前进行监听的时间单元的时长的具体方式本公开实施例不做限定。例如，用户设备可以根据基站配置、协议约定或者用户设备的自身能力等因素中的一个或多个确定。为了减少用户设备的耗能，用户设备在资源选择前的进行间监听的时长可以小于一设定时长，如小于直连通信中允许进行非周期性的资源预留的最大时间间隔，即用户在资源选择前可以进行小于W个时间单元的时长的监听。
可选的，确定上述第一时长可以包括：
根据监听的最小时间长度，确定进行监听的时间单元的时长。
也就是说，进行监听的时间单元的时长应不小于最小时间长度。对于该最小时间长度，可以参照前文中对于该最小时间长度的描述。例如，该最小时间长度可以是预配置的，也可以是基站通过信令指示的，如基站RRC(Radio Resource Control，无线资源控制)信令或者其他动态控制信令等指示的，还可以是根据待发送数据的优先级确定的。
需要说明的是，用户设备在根据上述最小时间长度进行sensing时，可以是进行时间长度等于该最小时间长度的资源sensing，也可以是进行大于该最小时间长度的资源sensing。例如，最小时间长度为10个时间单元，用户设备在进行资源选择之前则需要进行最少10个时间单元的sensing。其中，在不小于该最小时间长度的前提下，用户设备具体进行多长时间的sensing，本公开实施例不做限定，如可以基于预先设定的方式确定具体时长，或者还可以结合从基站接收到的指示确定，或者还可以是其它方式，如用户设备还可以根据自身的能力、所要传输的数据的优先级等因素来确定。
本公开的可选实施例中，在进行资源选择之前进行监听，根据进行监听的时间单元的时长、以及进行资源选择的时刻，确定候选资源对应的至少一个时间单元，包括：
根据进行资源选择的时刻、以及进行监听的时间单元的时长，确定开始进行监听的时刻；
将位于开始进行监听的时刻之后的、且与开始进行监听的时刻的时间间隔不小于第五时长阈值的至少一个时间单元，确定为候选资源对应时间单元。
其中，开始进行监听的时刻中时刻的时间粒度与时间单元的时间粒度可以相同，也可以不同，可以参考前文中对于进行资源选择的时刻的解释。第五时长阈值的具体取值本公开实施例不做限定，如可以与前文中的第四时长阈值相同，也可以不同。
基于本公开的该可选方案，用户设备在进行资源选择之前，可以进行一段时间的监听，并基于开始进行监听的时刻，将位于该时间单元之后的、且与开始进行监听的时刻不小于第五时长阈值的时间单元，确定为候选资源所对应的时间单元。后续可以从这些时间单元所对应的资源中随机选择或者按照一定的规则选择进行待发送数据传输的资源。与前文中不进行监听，与将进行资源选择的时刻之后的、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的至少一个时间单元，确定为候选资源对应的时间单元的方案相比，采用该可选方案，用户设备可以选择延时更小的资源。
作为一可选方案，假设用户设备在第n个时间单元进行资源选择，在资源选择前X个时间单元开始进行连续监听，即开始进行监听的时刻为第n-X个时间单元，假设上述第五时长阈值为W个时间单元，那么用户设备能够选择位于第W-X-2个时间单元之后的资源(以第n个时间单元为起始时间单元)。例如，使用监听窗口(sensing window)和资源选择窗口的概念，假设用户在时间单元n进行资源选择，监听窗口为[n-X，n-Tproc)，用户的资源选择窗口的起始位置应该不早于时间单元n+W-X-1(包括时间单元n+W-X-1)，其中，Tproc为用户设备得到监听结果所需要的必要处理时间。
作为一个示例，仍以slot作为时间单元的单位为例，并假设Tproc＝0，如图5中所示，假设当前用户设备在to时刻(第n个slot内，即图中所示的slot n)进行资源选择，用户设备在进行资源选择之前进行了X个时间单元的监听，即用户设备在[n-X，n)内进行了监听，在时间单元n进行资源选择，因为在监听窗口之外(即时间单元n-X之前，该示例中为图中所示的第n-x-1个时间单元)的资源预留最迟只能预留n+W-X-2时间单元对应的资源，即最迟的时间单元为第n+W-X-2个时间单元(图中所示的slot n+W-X-2)，该示例中是以直连通信中允许进行非周期性的资源预留的最大时间间隔为32个slot为例进行的示意性说明，即W＝32。所以将资源选择窗口的起始位置定在n+W-X-1就可以避免和监听窗口之外的资源预留发生碰撞，如图4中所示， 该示例中的候选资源的范围为[n+W-X-1,PDB)时间范围内的各时间单元所对应的资源，可以从这些时间单元对应的资源中选择用于数据传输的资源，具体选择的方式本公开实施例不做限定，如可以随机选择或者按照一定的规则选择。
可见，本公开实施例所提供的上述各可选实施例中，用户设备在进行资源选择之前可以不进行sensing，也可以进行一段时间的sensing，而不论选择哪种方式，与现有的方案相比，用户设备均能够减少监听时间，从而能够满足节能的要求。
本公开的可选实施例中，该方法包括：
响应于确定待发送数据，对用于传输待发送数据的信道进行监听。
也就是说，用户设备开始进行监听的激发条件可以是由于新数据的到达。
本公开的可选实施例中，该方法还可以包括：
响应于待发送数据的数据优先级不小于设定优先级，和/或，待发送数据的PDB不大于第六时长阈值时，在进行资源选择之前不进行监听，或者在进行资源选择之前进行小于第七时长阈值的监听。
也就是说，对于数据优先级较高的传输，或者是传输时延要求较高的传输，用户设备可以选择不进行监听，或者进行一个时长较短(即小于第六时长阈值)的监听。
其中，对于上述第六时长阈值或第七时长阈值的具体取值本公开实施例不做限定，如可以是预配置的，也可以是基站指示给用户设备的。可选的，该第六时长阈值的可选确定方式可以参照前文中关于第三时长阈值的确定方式，即可以采用上述确定第三时长阈值的任一可选方式确定该设定时长。对于第七时长阈值，可选的，对于不同类型的用户设备可以配置不同的第四时长阈值，如对于V2P中的用户设备，可以配置一个相对短的时长阈值，以达到省电的目的。
该可选方案中，设定优先级限制了用户设备不进行监听或者只进行较短时长的监听时，待发送数据的数据优先级下限，只有当数据传输的优先级不低于下限(即设定优先级)时，用户设备才可以不进行监听或者进行不基于足够长的监听的资源选择。上述第六时长阈值则是限制了不进行监听或者只进行较短时长的监听时，待发送数据的PDB所要满足的要求， 只有满足该要求，用户设备才可以不进行监听或者进行不基于足够长的监听的资源选择。作为一可选方式，假设第六时长阈值为W+A个时间单元，A为不小于零的正数，则只有当PDB≤W+A(即W+A个时间单元)时，才允许用户设备不进行监听或者进行不基于足够长的监听的资源选择。其中，A为可以为预定义值或者为预配置的值。在实际应用中，A可以取大于0的值，这主要是考虑到当PDB只是稍微超出W个时间单元时，在采用图3示例所对应的方案或者图4示例所对应的方案进行资源选择时，用户设备可以选择的时间单元的个数可能很少，影响资源选择的质量。
其中，对于PDB的限制方式中，第六时长阈值可以为固定取值，也可以是不同的待发送数据的优先级对应不同的取值。例如，对于越高的优先级，可以对应相对越大的时长阈值，如配置越大的上述A的取值，以保证用户设备有相对更多的候选资源。
可选的，对于将进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的至少一个时间单元，确定为候选资源对应时间单元的方案，上述第六时长阈值不小于第四时长阈值。对于将开始进行监听的时刻之后的、且与开始进行监听的时刻的时间间隔不小于第五时长阈值的至少一个时间单元，确定为候选资源所对应的时间单元的方案，第六时长阈值不小于第五时长阈值。
如图4中所示的示例，假设在时间单元n进行资源选择，假设第四设定时长阈值为W个时间单元，则位于时间单元n之后的。且与时间单元n的时间间隔不小于第四设定时长阈值的最早的候选资源所对应的时间单元为时间单元n+W-2，时间差为W-1个时间单元。同样的，对于进行的监听的方式，假设第五时长阈值也是W个时间单元，如图5中所示的示例，所能够选择的资源与开始监听的资源之间的时间间隔也不会小于W-1个时间单元。假设监听是通过数据到达激发的，那么无论是将位于进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的时间单元，确定为候选资源所对应的时间单元，还是将位于开始进行监听的时刻之后的、且与开始进行监听的时刻的时间间隔不小于第五时长阈值的时间单元，确定为候选资源所对应的时间单元，从数据到达到选择的资源之间的时间差都不会小于W-1个时间单元。这两种方式均需要满足待发送数据的PDB不小于W个 时间单元，即第六时长阈值不小于第四时长阈值，或者不小于第五时长阈值，此时用户设备才能够有候选资源可选。
因此，对于一些延时要求比较严格的业务(例如PDB<W个时间单元)，上述方式用户设备无法选择到合适的资源。对于这些时延要求比较严格的业务数据的传输，用户设备则可以进行如下操作：
用户设备能够在进行资源选择的时刻之后的、满足PDB要求的候选资源中进行选择，也就是说，对于图4中的示例，可以在时间单元n之后、且时间单元n+W-1之前的资源中进行选择，对于图5中的示例，则可以在时间单元n之后、且时间单元n+W-x-1之前的资源中进行选择。例如，使用资源选择窗的概念，如果用户设备在时刻t0进行资源选择，假设第六时长阈值为W个时间单元，若PDB＜W个时间单元，用户设备则可以选择t0+Tproc2之后，而且t0+PDB之前的资源，其中，Tproc2≥0指用户用于选择资源后用于准备数据发送的必要处理时间。
另一可选方式中，由于其他用户设备有可能在满足时延要求的时间单内预留了资源，如果在资源选择之前不进行监听，选择的资源有可能会与其他用户设备的资源预留发生碰撞。对于该情况，在待发送数据的PDB小于第六时长阈值时，用户设备也可以进行一个相对较短时长的监听，可选的，该监听时长可以与待发送数据的PDB相对应，根据监听结果，从满足时延要求的资源中选择资源，以避免或减少所选择的资源与其他用户设备的预留资源发生资源碰撞。
基于本公开各可选实施例所提供的方案，用户设备在进行资源选择时，可以减少监听时间，并相应的选择一定时间间隔之后的资源进行数据传输，能够有效减少直连通信用户设备的耗能，达到节能的效果，该方案尤其适用于，该方案可以应用于直连通信中的任一直连通信设备中，尤其适用于具有更好节电需求的直连通信场景中，如V2P通信场景。
需要说明的是，对于本公开各可选实施例所提供的方案中，不同可选实施例中的实现原理是可以相互参照的。
基于与本公开所提供的图1中所对应的资源选择方法相同的原理，本公开实施例还提供了一种直连通信中的资源选择装置，如图6中所示，该资源选择装置100可以包括资源确定模块110和资源选择模块120。其中：
资源确定模块110，被配置为根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，时间单元集合中包括一个或多个第一时间单元；
资源选择模块120，被配置为根据满足监听条件的至少一个第一时间单元对应的资源，确定用于传输待发送数据的资源。
可选的，资源确定模块110还被配置为：
根据至少一个第一时间单元与进行资源选择的时刻之间的时间间隔，确定监听条件。
可选的，资源确定模块110还被配置为：
响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔大于第一时长阈值，或者响应于时间间隔等于第一时长阈值，监听条件包括在进行资源选择的时刻之前进行监听的最小时间单元集合为空集；
响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔小于第一时长阈值，或者响应于时间间隔等于第一时长阈值，监听条件包括对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听。
可选的，资源确定模块110还被配置为：
根据时间间隔，确定第二时长阈值。
可选的，资源确定模块110还被配置为：
响应于待发送数据的数据包时延预算PDB小于第三时长阈值，或者响应于PDB等于第三时长阈值，监听条件至少包括：在进行资源选择的时刻之前进行监听的最小时间单元集合为空集。
可选的，资源确定模块110还被配置为：
根据接收到的第一指示信息，确定第三时长阈值；
和/或
根据待发送数据的数据优先级确定第三时长阈值。
可选的，资源确定模块110在根据待发送数据的数据优先级确定第三时长阈值时被配置为：
根据待发送数据的数据优先级、以及数据优先级与第三时长阈值之间的第一映射关系，确定第三时长阈值。
可选的，资源确定模块110还被配置为：
确定监听的最小时间长度。
可选的，资源确定模块110在确定用于监听的最小时间长度时被配置为：
根据接收到的第二指示信息，确定最小时间长度；
和/或
根据待发送数据的数据优先级确定最小时间长度。
可选的，资源确定模块110在根据待发送数据的数据优先级确定最小时间长度时被配置为：
根据待发送数据的优先级、以及数据的优先级与对应的最小时间长度的第二映射关系，确定最小时间长度。
可选的，资源确定模块110还被配置为：
响应于确定待发送数据，对用于传输待发送数据的信道进行监听。
基于与本公开所提供的图2中所对应的资源选择方法相同的原理，本公开实施例还提供了一种直连通信中的资源选择装置，如图7中所示，该资源选择装置200可以包括资源确定模块210和资源选择模块220。其中：
资源确定模块210，被配置为根据监听模式，确定候选资源对应的至少一个时间单元；
资源选择模块220，被配置为根据确定出的至少一个时间单元对应的资源，确定用于传输待发送数据的资源。
可选的，上述监听模式包括在进行资源选择之前不进行监听或在进行资源选择之前进行监听。
可选的，资源确定模块210可以被配置为：
响应于在进行资源选择之前不进行监听，将位于进行资源选择的时刻之后的至少一个时间单元，确定为候选资源对应的时间单元；
响应于在进行资源选择之前进行监听，根据进行监听的时间单元的时长、以及进行资源选择的时刻，确定候选资源对应的至少一个时间单元。
可选的，资源确定模块210可以被配置为：
将位于进行资源选择的时刻之后、且与进行资源选择的时刻的时间间隔不小于第四时长阈值的至少一个时间单元，确定为候选资源对应的时间单元。
可选的，资源确定模块210还被配置为：
根据监听的最小时间长度，确定上述进行监听的时间单元的时长。
可选的，资源确定模块210可以被配置为：
根据进行资源选择的时刻、以及进行监听的时间单元的时长，确定开始进行监听的时刻；
将位于开始进行监听的时刻之后的、且与开始进行监听的时刻的时间间隔不小于第五时长阈值的至少一个时间单元，确定为候选资源对应的时间单元。
可选的，资源确定模块210还被配置为：
响应于确定待发送数据，对用于传输待发送数据的信道进行监听。
可选的，资源确定模块210还被配置为：
响应于待发送数据的数据优先级不小于设定优先级，和/或，待发送数据的PDB不大于第六时长阈值时，在进行资源选择之前不进行监听，或者在进行资源选择之前进行小于第七时长阈值的监听。
需要说明的是，由于本公开实施例所提供的装置为可以执行本公开实施例中的方法的装置，故而基于本公开实施例中所提供的方法，本领域所属技术人员能够了解本公开实施例的装置的具体实施方式以及其各种变化形式，所以在此对于该装置如何实现本公开实施例中的方法不再详细介绍。只要本领域所属技术人员实施本公开实施例中的方法所采用的装置，都属于本公开所欲保护的范围。
其中，本公开实施例所提供的上述资源选择装置，具体可以实现为用户设备，该用户设备包括至少一个处理器，该至少一个处理器可以被配置为：执行本公开任一可选实施例中所提供的资源选择方法。
基于与本公开实施例所提供的方法相同的原理，本公开实施例还提供了一种电子设备，该电子设备包括存储器和处理器，其中，该存储器中存储有计算机程序，该处理器在运行该存储器中所存储的计算机程序时，可以执行本公开任一可选实施例中所提供的资源选择方法。
本公开实施例还提供了一种计算机可读存储介质，该存储介质中存储有计算机程序，该计算机程序在被处理器执行时，可以执行本公开任一可选实施例中所提供的资源选择方法。
作为一示例，图8示出了适用于本公开实施例的一种电子设备的结构 示意图，该电子设备具体可以实现为直连通信用户设备，如智能手机，该设备可以用于实施本公开任一可选实施例中所提供的资源选择方法。
如图8中所示，该电子设备2000主要可以包括至少一个处理器2001、存储器2002、通信接口2003、输入/输出接口2004、电源组件2005等组件。其中，各组件之间可以通过总线2006实现连接通信。
具体的，电源组件2005用于为电子设备2000提供工作电源，该电源组件可以包括但不限于可充电电池、充电接口、充电保护电路等等。
存储器2002可以用于存储计算机程序等，该计算机程序可以包括在被处理器2001调用时实现本公开实施例所示方法的程序代码或指令，还可以包括用于实现其他功能或服务的程序。
存储器2002可以是ROM(Read Only Memory，只读存储器)或可存储静态信息和指令的其他类型的静态存储设备，RAM(Random Access Memory，随机存取存储器)或者可存储信息和指令的其他类型的动态存储设备，也可以是EEPROM(Electrically Erasable Programmable Read Only Memory，电可擦可编程只读存储器)、CD-ROM(Compact Disc Read Only Memory，只读光盘)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器2001通过总线2006与存储器2002连接，通过调用存储器2002中所存储的应用程序实现相应的功能。其中，处理器2001可以是CPU(Central Processing Unit，中央处理器)，通用处理器，DSP(Digital Signal Processor，数据信号处理器)，ASIC(Application Specific Integrated Circuit，专用集成电路)，FPGA(Field Programmable Gate Array，现场可编程门阵列)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本公开公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器2001也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等。
通信装置2003可以允许电子设备2000与其他电子设备进行无线或有线通信以交换数据，如电子设备2000通过通信装置发送直连通信数据， 并可以接收基站或其他电子设备发送的数据(或指令等)。该通信装置2003可以包括但不限于接收器、发送器、有线网络接口、无线网络接口、天线等各项中的部分或全部。
该电子设备2000通过输入/输出接口2004可以连接所需要的输入/输出设备，如外接存储装置、充电设备等等，以可以将电子设备2000中的数据存储到其他存储装置中，或者将其他存储装置中的数据存储到该电子设备2000中。可以理解的，输入/输出接口2004可以是有线接口，也可以是无线接口。
用于连接各部件的总线2006可包括一通路，在上述组件之间传送信息。总线2006可以是PCI(Peripheral Component Interconnect，外设部件互连标准)总线或EISA(Extended Industry Standard Architecture，扩展工业标准结构)总线等。根据功能的不同，总线2006可以分为地址总线、数据总线、控制总线等。
可选的，对于本公开实施例所提供的方案而言，存储器2002可以用于存储执行本公开方案的应用程序代码，并由处理器2001来控制执行。处理器2001用于执行存储器2002中存储的应用程序代码，以实现本公开实施例提供的方法或装置的动作。
应该理解的是，虽然附图的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其他的顺序执行。而且，附图的流程图中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其他步骤或者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
以上仅是本公开的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (14)

  1. 一种直连通信中的资源选择方法，其特征在于，包括：
    根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，所述时间单元集合中包括一个或多个第一时间单元；
    根据所述满足监听条件的至少一个第一时间单元对应的资源，确定用于传输待发送数据的资源。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    根据至少一个第一时间单元与进行资源选择的时刻之间的时间间隔，确定所述监听条件。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法包括：
    响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔大于第一时长阈值，或者响应于所述时间间隔等于所述第一时长阈值，所述监听条件包括在进行资源选择的时刻之前进行监听的最小时间单元集合为空集；
    响应于至少一个第一时间单元与进行资源选择的时刻之间的时间间隔小于所述第一时长阈值，或者响应于所述时间间隔等于所述第一时长阈值，所述监听条件包括对位于进行资源选择的时刻之前的不小于第二时长阈值的时间单元进行监听。
  4. 根据权利要求3所述的方法，其特征在于，还包括：
    根据所述时间间隔，确定所述第二时长阈值。
  5. 根据权利要求1所述的方法，其特征在于，所述方法包括：
    响应于所述待发送数据的数据包时延预算PDB小于第三时长阈值，或者响应于所述PDB等于第三时长阈值，所述监听条件至少包括：在进行资源选 择的时刻之前进行监听的最小时间单元集合为空集。
  6. 根据权利要求5所述的方法，其特征在于，还包括：
    根据接收到的第一指示信息，确定所述第三时长阈值；
    和/或
    根据所述待发送数据的数据优先级确定所述第三时长阈值。
  7. 根据权利要求6所述的方法，其特征在于，所述根据所述待发送数据的数据优先级确定所述第三时长阈值，包括：
    根据所述待发送数据的数据优先级、以及数据优先级与第三时长阈值之间的第一映射关系，确定所述第三时长阈值。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，还包括：
    确定监听的最小时间长度。
  9. 根据权利要求8所述的方法，其特征在于，所述确定用于监听的最小时间长度，包括：
    根据接收到的第二指示信息，确定所述最小时间长度；
    和/或
    根据所述待发送数据的数据优先级确定所述最小时间长度。
  10. 根据权利要求9所述的方法，其特征在于，所述根据所述待发送数据的数据优先级确定所述最小时间长度，包括：
    根据所述待发送数据的优先级、以及数据的优先级与对应的最小时间长度的第二映射关系，确定所述最小时间长度。
  11. 根据权利要求1至7中任一项所述的方法，其特征在于，所述方法包括：
    响应于确定所述待发送数据，对用于传输所述待发送数据的信道进行监 听。
  12. 一种直连通信中的资源选择装置，其特征在于，包括：
    资源确定模块，被配置为根据用于直连通信的资源对应的时间单元集合中，确定满足监听条件的至少一个第一时间单元；其中，所述时间单元集合中包括一个或多个第一时间单元；
    资源选择模块，被配置为根据所述满足监听条件的至少一个第一时间单元对应的资源，确定用于传输待发送数据的资源。
  13. 一种电子设备，其特征在于，所述电子设备包括存储器和处理器；
    所述存储器中存储有计算机程序；
    所述处理器用于在运行所述计算机程序时执行权利要求1至11中任一项所述的资源选择方法。
  14. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序在被处理器运行时用于执行权利要求1至11中任一项所述的资源选择方法。
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