WO2020088227A1 - 边链路传输方法、终端及计算机可读存储介质 - Google Patents

边链路传输方法、终端及计算机可读存储介质 Download PDF

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Publication number
WO2020088227A1
WO2020088227A1 PCT/CN2019/110944 CN2019110944W WO2020088227A1 WO 2020088227 A1 WO2020088227 A1 WO 2020088227A1 CN 2019110944 W CN2019110944 W CN 2019110944W WO 2020088227 A1 WO2020088227 A1 WO 2020088227A1
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WIPO (PCT)
Prior art keywords
time
preset position
side link
time domain
control information
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PCT/CN2019/110944
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English (en)
French (fr)
Inventor
曲鑫
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北京展讯高科通信技术有限公司
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Application filed by 北京展讯高科通信技术有限公司 filed Critical 北京展讯高科通信技术有限公司
Priority to EP19880230.8A priority Critical patent/EP3876635A4/en
Priority to US17/289,692 priority patent/US20210410112A1/en
Publication of WO2020088227A1 publication Critical patent/WO2020088227A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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]

Definitions

  • the present invention relates to the field of communication technology, and in particular, to a side link transmission method, terminal, and computer-readable storage medium.
  • V2X Vehicle to X
  • vehicle to X which is the exchange of information between vehicles and the outside world, is the key technology of the future intelligent transportation system.
  • the application of V2X technology enables vehicles to communicate with vehicles, pedestrians to vehicles, and base stations to communicate with each other to obtain a series of traffic information such as real-time road conditions, road information, pedestrian information, etc. .
  • LTE Long Term Evolution
  • UE User Equipment
  • 5G fifth generation mobile communication
  • New, Radio New, Radio
  • the resource sensing method combining short-term sensing and long-term sensing is currently adopted to select the sidelink to send control information and data time-frequency resources.
  • the so-called side link refers to the wireless communication protocol between the UE and the UE without the participation of the base station.
  • the so-called resource awareness is a method for determining whether time-frequency resources are occupied by decoding control information and / or performing signal energy measurement.
  • the problem to be solved by the present invention is how to determine the time domain position of the side link control information on the time-frequency resource.
  • an embodiment of the present invention provides a side link transmission method.
  • the method includes: acquiring a time-frequency resource for transmission on the side link; and using a preset position on the time-frequency resource as an edge The time domain sending position of the link control information, and sending the side link control information on the side link.
  • the preset positions include: a first preset position and a second preset position; the use of the preset position on the time-frequency resource as the time domain sending position of the side link control information includes: According to the time when the time-frequency resource is successfully obtained, it is determined that the preset position is the first preset position or the second preset position, and the start position of the first preset position is earlier than the first position in the time domain The starting position of the second preset position.
  • the time domain length of the time-frequency resource is a resource selection time domain unit, and the frequency domain length is at least one subchannel;
  • the resource selection time domain unit is a time slot, multiple time slots, or multiple symbols ;
  • the subchannel is at least one frequency domain resource block.
  • the first preset position is the first L symbols in the resource selection time domain unit, where L is the time domain length of the side link control information, L is a positive integer, and L is less than or It is equal to the total number of symbols in the resource selection time domain unit.
  • the first preset position is the 2nd to L + 1th symbol in the resource selection time domain unit, L is the time domain length of the side link control information, and L is a positive integer, And L + 1 is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the second preset position is the W + 1th to W + Lth symbols in the resource selection time domain unit, where the Wth symbol is the time window of the resource selection time domain unit End symbol, L is the time domain length of the side link control information, W and L are positive integers, W + L is less than or equal to the total number of symbols in the resource selection time domain unit; the time window is The maximum time length allowed for resource sensing in the resource selection time domain unit, and the start symbol of the time window is the start symbol of the resource selection time domain unit.
  • the second preset position is the W + 2th to W + L + 1th symbol in the resource selection time domain unit, where W + L + 1 is less than or equal to the resource selection time domain
  • the total number of symbols in the unit L is the time domain length of the side link control information, W and L are both positive integers, and W + L + 1 is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the determining the preset position as the first preset position or the second preset position according to the time when the time-frequency resource is successfully obtained includes: the time when the time-frequency resource is successfully obtained Later than the start time of the first preset position, it is determined that the preset position is the second preset position, otherwise it is determined that the preset position is the first preset position.
  • the method further includes: successfully acquiring the first symbol or the second symbol after the time-frequency resource within the time window where the location is located Sending the side link data corresponding to the side link control information at the start of.
  • the method further includes: sending side link data corresponding to the side link control information at the starting moment of the preset position.
  • the method further includes: sending the side link data corresponding to the side link control information at the end time of the preset position.
  • An embodiment of the present invention further provides a terminal.
  • the terminal includes: an acquiring unit adapted to acquire a time-frequency resource used for transmission on a side link; a first transmission unit adapted to apply a pre-time on the time-frequency resource Let the position be the time domain transmission position of the side link control information, and send the side link control information on the side link.
  • the preset location includes: a first preset location and a second preset location; the first transmission unit is adapted to determine the preset location according to the time when the time-frequency resource is successfully acquired The first preset position or the second preset position, the start position of the first preset position is earlier than the start position of the second preset position in the time domain.
  • the time domain length of the time-frequency resource is a resource selection time domain unit, and the frequency domain length is at least one subchannel;
  • the resource selection time domain unit is a time slot, multiple time slots, or multiple symbols ;
  • the subchannel is at least one frequency domain resource block.
  • the first preset position is the first L symbols in the resource selection time domain unit, where L is the time domain length of the side link control information, L is a positive integer, and L is less than or It is equal to the total number of symbols in the resource selection time domain unit.
  • the first preset position is the 2nd to L + 1th symbol in the resource selection time domain unit, L is the time domain length of the side link control information, and L is a positive integer, And L + 1 is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the second preset position is the W + 1th to W + Lth symbols in the resource selection time domain unit, where the Wth symbol is the time window of the resource selection time domain unit End symbol, L is the time domain length of the side link control information, W and L are positive integers, W + L is less than or equal to the total number of symbols in the resource selection time domain unit; the time window is The maximum time length allowed for resource sensing in the resource selection time domain unit, and the start symbol of the time window is the start symbol of the resource selection time domain unit.
  • the second preset position is the W + 2th to W + L + 1th symbol in the resource selection time domain unit, where W + L + 1 is less than or equal to the resource selection time domain
  • the total number of symbols in the unit L is the time domain length of the side link control information, W and L are both positive integers, and W + L + 1 is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the first transmission unit is adapted to determine that the preset position is the first when the time when the time-frequency resource is successfully acquired is later than the start time of the first preset position Two preset positions, otherwise it is determined that the preset position is the first preset position.
  • the terminal further includes: a second transmission unit adapted to, when the preset position is the second preset position, successfully acquire the time-frequency resource within the time window in which it is located Sending the side link data corresponding to the side link control information at the starting moment of each symbol or the second symbol.
  • a second transmission unit adapted to, when the preset position is the second preset position, successfully acquire the time-frequency resource within the time window in which it is located Sending the side link data corresponding to the side link control information at the starting moment of each symbol or the second symbol.
  • the terminal further includes: a third transmission unit that sends the side link data corresponding to the side link control information at the beginning of the preset position.
  • the terminal further includes: a fourth transmission unit adapted to send the side link data corresponding to the side link control information at the end time of the preset position.
  • An embodiment of the present invention further provides a computer-readable storage medium on which computer instructions are stored, and when the computer instructions run, the steps of any of the above-mentioned methods are performed.
  • An embodiment of the present invention further provides a terminal, including a memory and a processor, the memory stores computer instructions capable of running on the processor, and the processor executes any one of the above when the computer instruction is executed The steps of the method.
  • the preset position of the time-frequency resource for transmission on the side link is used as the time-domain position of the side link control information, so that the receiving terminal can determine the specific time-frequency resource of the side link control information.
  • Send location the sending terminal sends the side link control information at a fixed position of the time-frequency resource, so that the receiving terminal does not need to blindly detect the side link control information at every possible moment when the short-term perception is successful Therefore, the complexity of blind detection of the receiving terminal can be reduced, the receiving efficiency can be improved, and the power consumption of the receiving terminal can be reduced.
  • FIG. 1 is a flowchart of a side link transmission method in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a process of acquiring time-frequency resources according to an embodiment of the present invention
  • 3 to 11 are schematic diagrams of time-frequency transmission positions of side link control information and data in an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • V2X of LTE the semi-static resource selection method of long-term perception is mainly used to obtain transmission resources.
  • NR V2X due to the increase in business types, the existing long-term sensing method cannot meet the business requirements well. Therefore, a semi-static resource selection method using a combination of short-term sensing and long-term sensing is proposed to determine Used to send control information and data time-frequency resources on the side link.
  • an embodiment of the present invention provides a side link transmission method.
  • the receiving The terminal can determine the specific transmission position of the side link control information on the time-frequency resource, and at the same time, it can eliminate the need for the receiving terminal to blindly check the side link control information at every possible moment when the short-term perception is successful, so it can reduce the blind detection of the receiving terminal Complexity, improve the receiving efficiency, and reduce the power consumption of the receiving terminal.
  • an embodiment of the present invention provides a side link transmission method.
  • the method may include the following steps:
  • Step 11 Obtain time-frequency resources for transmission on the side link.
  • multiple methods can be used to obtain the time-frequency resources used for transmission on the side link, without specific restrictions.
  • the car networking terminal starts resource selection or reselection at time n.
  • the resource selection window C1 is determined, and the time range is from time n + T1 to time n + T2.
  • the Internet of Vehicles terminal can remove the unavailable time-frequency resource Z1 in the resource selection window C1 according to the perception result in the time window C2, and select 20% of the available time-frequency resource as the candidate time-frequency resource Z2.
  • the time range of the long-time sensing time window C2 is from time n-T4 to time n-T3, and T4> T3> 0.
  • the time window C2 is referred to as a long-time perception time window.
  • the IOV terminal can generate a short-time perception time window based on other factors such as service priority, but its length cannot exceed the maximum value of the short-term perception time window length.
  • the short-term sensing process is as follows: a value is randomly selected within the time window, and within the duration indicated by the value, the IOV terminal performs energy measurement in the frequency domain of the time-frequency resource randomly selected in the candidate resource Z2. During the duration, if the energy measurement values are all below a threshold, the selected time-frequency resource is considered to be idle and not occupied by other terminals, and the IOV terminal may select the time-frequency resource to send a side link Control information and data.
  • the time window in the short-time sensing process is referred to as a short-time sensing time window.
  • the terminal may reserve the currently acquired time-frequency resources and indicate them in the side link control information.
  • the terminal may directly send the side link control information at the beginning of the time-frequency resource reserved by itself, without the need to perform long-term and short-term sensing again.
  • the chain transmission method determines the time domain transmission position of the side link control information and data. For a randomly selected value in the short-time sensing time window that is not 0, and the acquired time-frequency resource is not reserved, the terminal can perform short-time sensing based on the randomly selected value, and then apply the embodiment of the present invention
  • the mid-side chain transmission method determines the time-domain sending position of the side chain control information and data.
  • Step 12 Use the preset position on the time-frequency resource as the time domain sending position of the side link control information, and send the side link control information on the side link.
  • one or more fixed positions on the time-frequency resource may be used as the time-domain transmission position of the side link control information in advance.
  • the preset position can be set in various ways.
  • the time-domain length of the time-frequency resource may be a resource selection time-domain unit, and the frequency-domain length is at least one sub-channel, and a sub-channel may be composed of several frequency-domain resource blocks.
  • the resource selection time domain unit is a time slot, multiple time slots, or multiple symbols, which may be specifically configured or pre-defined by higher layers.
  • the starting position of the short-time perception time window is the starting position of the resource selection time domain unit.
  • the preset position may include a first preset position and a second preset position.
  • the starting position of the first preset position is earlier than the starting position of the second preset position in the time domain.
  • the start time of the first preset position is earlier than the start time of the second preset position.
  • the preset position may be determined as the first preset position or the second preset position according to the time when the time-frequency resource is successfully acquired. Specifically, when the time when the time-frequency resource is successfully acquired is later than the start time of the first preset position, it may be determined that the preset position is the second preset position. When the time when the time-frequency resource is successfully acquired is earlier than or equal to the starting time of the first preset position, it is determined that the preset position is the first preset position.
  • the first preset position and the second preset position may be set in various ways, which is not limited herein.
  • the terminal may adjust the time domain transmission position of the side link data according to the time domain transmission position of the side link control information. Normally, there is a corresponding relationship between the side link control information and the side link data.
  • the side link control information contains the necessary information to successfully decode the side link data.
  • the terminal may send the side link data first, or may send the side link control information first.
  • the total number of symbols in the resource selection time domain unit includes N symbols, and the corresponding time range is from time t 0 to time t N-1 .
  • the time domain length of the side link control information is L symbols, and L and N are positive integers.
  • the first preset position may be the first L symbols in the time domain unit of the resource selection, and the corresponding time range is from time t 0 to t L- 1 . At this time, L ⁇ N.
  • the corresponding side link data can be sent at the starting time t 0 of the first preset position, As shown in FIG. 4, the corresponding side link data may also be sent at the end time t L-1 of the first preset position.
  • the side link data is sent through a physical side link shared channel (Physical side link shared channel, PSSCH).
  • PSSCH Physical side link shared channel
  • the side link data is recorded as PSSCH.
  • the first preset position may be the The second to L + 1 symbols in the time domain unit of resource selection correspond to time symbols t 1 to t L. Among them, L + 1 ⁇ N.
  • the corresponding side link data may be sent at the starting time t 1 of the first preset position. As shown in FIG. 6, the corresponding side link data may also be sent at the end time t L of the first preset position.
  • the second preset position may be the W + 1th to W + Lth symbols in the resource selection time domain unit, and the corresponding time range is t W-1 to t W + L-1 .
  • the Wth symbol is the end symbol of the time window MAX in the resource selection time domain unit
  • W is a positive integer
  • W + L ⁇ N the time window MAX is the maximum length of time allowed for resource awareness in the resource selection time domain unit
  • the start symbol of the time window MAX is the start symbol of the resource selection time domain unit
  • the corresponding side link may be sent at the starting time t W-1 of the second preset position data.
  • the corresponding side link data may also be sent at the end time t W + L-1 of the second preset position.
  • the second predetermined position may be selected as the resource
  • the corresponding side link may be sent at the starting time t W + 1 of the second preset position data.
  • the corresponding side link data may also be sent at the end time t W + L of the second preset position.
  • the side link data corresponding to the side link control information is sent to the receiving terminal.
  • the starting position of the side link control information can be used to determine the receiving position of the side link data without using extra bits in the side link control information to indicate, effectively saving the bits occupied by the side link control information, and further Save time and frequency resources.
  • the method may further include: successfully acquiring the time-frequency within the time window where it is located Side link data corresponding to the side link control information is sent at the starting moment of the first symbol or the second symbol after the resource.
  • Side link data corresponding to the side link control information is sent at the starting moment of the first symbol or the second symbol after the resource.
  • the start time of the first symbol or the second symbol after successfully obtaining the time-frequency resource in the time window may be time n.
  • first preset position and the second preset position may also be set in other ways, regardless of the specifics of the first preset position and the second preset position, as long as it is the acquired time-frequency
  • the fixed positions on the resources are within the protection scope of the present invention.
  • the preset position of the time-frequency resource for transmission on the side link is used as the time domain position for sending the side link control information, so that the receiving terminal
  • the specific sending position of the side link control information on the time-frequency resources can be determined, and the blind detection complexity is reduced, the receiving efficiency is improved, and the power consumption of the receiving terminal is reduced.
  • an embodiment of the present invention provides a terminal 120.
  • the terminal 120 may include an acquisition unit 1201 and a first transmission unit 1202. among them:
  • the obtaining unit 1201 is adapted to obtain time-frequency resources for transmission on the side link;
  • the first transmission unit 1202 is adapted to use the preset position on the time-frequency resource as the time domain sending position of the side link control information, and send the side link control information on the side link.
  • the preset position may include: a first preset position and a second preset position; the first transmission unit is adapted to determine according to the time when the time-frequency resource is successfully acquired
  • the preset position is a first preset position or a second preset position, and the start position of the first preset position is earlier in time domain than the start position of the second preset position.
  • the time domain length of the time-frequency resource is a resource selection time domain unit, and the frequency domain length is at least one sub-channel; the resource selection time domain unit is a time slot and multiple time Gap or multiple symbols.
  • the first preset position is the first L symbols in the resource selection time domain unit, where L is the time domain length of the side link control information, and L is a positive integer , And L is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the first preset position is the 2nd to L + 1th symbol in the resource selection time domain unit, and L is the time domain length of the side link control information , L is a positive integer, and L + 1 is less than or equal to the total number of symbols in the resource selection time domain unit.
  • the second preset position is the W + 1th to W + Lth symbols in the resource selection time-domain unit, where the Wth symbol is the resource selection time
  • the end symbol of the time window in the domain unit L is the time domain length of the side link control information, W and L are both positive integers, W + L is less than or equal to the total number of symbols in the resource selection time domain unit;
  • the time window is the maximum time length allowed for resource sensing in the resource selection time domain unit, and the start symbol of the time window is the start symbol of the resource selection time domain unit.
  • the second preset position is the W + 2th to W + L + 1th symbols in the resource selection time domain unit, where W + L + 1 is less than or equal to The total number of symbols in the resource selection time domain unit, L is the time domain length of the side link control information, W and L are positive integers, and W + L + 1 is less than or equal to the resource selection time domain unit The total number of symbols.
  • the first transmission unit 1202 is adapted to determine that the preset position is the location when the time when the time-frequency resource is successfully acquired is later than the start time of the first preset position The second preset position, otherwise it is determined that the preset position is the first preset position.
  • the terminal 120 may further include: a second transmission unit 1203, adapted to successfully obtain the time-frequency resource within the time window where the preset position is the second preset position Side link data corresponding to the side link control information is sent at the starting moment of the first symbol or the second symbol after the last symbol.
  • the terminal 120 may further include: a third transmission unit (not shown) that sends the side link data corresponding to the side link control information at the starting moment of the preset position.
  • a third transmission unit (not shown) that sends the side link data corresponding to the side link control information at the starting moment of the preset position.
  • the terminal 120 may further include: a fourth transmission unit (not shown), adapted to send the side link data corresponding to the side link control information at the end time of the preset position.
  • a fourth transmission unit (not shown), adapted to send the side link data corresponding to the side link control information at the end time of the preset position.
  • An embodiment of the present invention also provides another computer-readable storage medium on which computer instructions are stored.
  • the steps of any one of the side link transmission methods in the foregoing embodiments are executed, and details are not described herein. .
  • the computer-readable storage medium may include: ROM, RAM, magnetic disk, or optical disk.
  • An embodiment of the present invention further provides a user terminal, where the user terminal may include a memory and a processor, and the memory stores computer instructions capable of running on the processor, and the processor runs the computer instructions.

Abstract

一种边链路传输方法、终端及计算机可读存储介质。所述方法包括：获取边链路上用于传输的时频资源；将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。应用上述方案，可以使得接收终端能够确定边链路控制信息在时频资源上的具体发送位置，并可以降低接收终端盲检复杂度，提高接收效率，降低接收终端的功耗。

Description

边链路传输方法、终端及计算机可读存储介质
本申请要求于2018年11月2日提交中国专利局、申请号为201811300749.2、发明名称为“边链路传输方法、终端及计算机可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体涉及一种边链路传输方法、终端及计算机可读存储介质。
背景技术
V2X(Vehicle to X)，即车对外界的信息交换，是未来智能交通运输系统的关键技术。应用V2X技术，使得车与车、车与行人、车与基站之间能够通信，进而可以获得实时路况、道路信息、行人信息等一系列交通信息，有效提高驾驶安全性、减少拥堵、提高交通效率。
在长期演进(Long Term Evolution，LTE)中，应用V2X技术的用户终端(User Equipment，UE)仅支持周期性且数据包的大小相同的业务。相对于LTE的V2X，第五代移动通信(5G)的新无线(New，Radio)的V2X还支持周期性但数据包的大小不同的业务及非周期业务。
为了更好地满足NR V2X的业务需求，目前采用短时间感知与长时间感知相结合的资源感知方式，来选择在边链路(sidelink)用于发送控制信息及数据时频资源。其中，所谓边链路，即在没有基站参与的前提下，UE与UE之间的无线通信协议。所谓资源感知，即通过译码控制信息和/或进行信号能量测量，来确定时频资源是否被占用 的方法。
然而，在采用上述方法确定边链路传输控制信息及数据的时频资源后，如何确定边链路控制信息及数据在时频资源上的发送位置，尚未存在解决方案。
发明内容
本发明要解决的问题是如何确定边链路控制信息在时频资源上的时域位置。
为解决上述问题，本发明实施例提供了一种边链路传输方法，所述方法包括：获取边链路上用于传输的时频资源；将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
可选地，所述预设位置包括：第一预设位置及第二预设位置；所述将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，包括：根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。
可选地，所述时频资源的时域长度为一个资源选择时域单元，频域长度为至少一个子信道；所述资源选择时域单元为一个时隙、多个时隙或多个符号；所述子信道为至少一个频域资源块。
可选地，所述第一预设位置为所述资源选择时域单元内前L个符号，其中，L为所述边链路控制信息的时域长度，L为正整数，且L小于或等于所述资源选择时域单元内总符号数量。
可选地，所述第一预设位置为所述资源选择时域单元内第2个至第L+1个符号，L为所述边链路控制信息的时域长度，L为正整数，且L+1小于或等于所述资源选择时域单元内总符号数量。
可选地，所述第二预设位置为所述资源选择时域单元内第W+1至第W+L个符号，其中，第W个符号为所述资源选择时域单元内时间窗的结束符号，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L小于或等于所述资源选择时域单元内总符号数量；所述时间窗为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗的起始符号为所述资源选择时域单元的起始符号。
可选地，所述第二预设位置为所述资源选择时域单元内第W+2至第W+L+1个符号，其中，W+L+1小于或等于所述资源选择时域单元内总符号数量，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L+1小于或等于所述资源选择时域单元内总符号数量。
可选地，所述根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，包括：当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，确定所述预设位置为所述第二预设位置，否则确定所述预设位置为所述第一预设位置。
可选地，当所述预设位置为所述第二预设位置时，所述方法还包括：在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送所述边链路控制信息对应的边链路数据。
可选地，所述方法还包括：在所述预设位置的起始时刻发送所述边链路控制信息对应的边链路数据。
可选地，所述方法还包括：在所述预设位置的结束时刻发送所述边链路控制信息对应的边链路数据。
本发明实施例还提供了一种终端，所述终端包括：获取单元，适于获取边链路上用于传输的时频资源；第一传输单元，适于将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
可选地，所述预设位置包括：第一预设位置及第二预设位置；所述第一传输单元，适于根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。
可选地，所述时频资源的时域长度为一个资源选择时域单元，频域长度为至少一个子信道；所述资源选择时域单元为一个时隙、多个时隙或多个符号；所述子信道为至少一个频域资源块。
可选地，所述第一预设位置为所述资源选择时域单元内前L个符号，其中，L为所述边链路控制信息的时域长度，L为正整数，且L小于或等于所述资源选择时域单元内总符号数量。
可选地，所述第一预设位置为所述资源选择时域单元内第2个至第L+1个符号，L为所述边链路控制信息的时域长度，L为正整数，且L+1小于或等于所述资源选择时域单元内总符号数量。
可选地，所述第二预设位置为所述资源选择时域单元内第W+1至第W+L个符号，其中，第W个符号为所述资源选择时域单元内时间窗的结束符号，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L小于或等于所述资源选择时域单元内总符号数量；所述时间窗为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗的起始符号为所述资源选择时域单元的起始符号。
可选地，所述第二预设位置为所述资源选择时域单元内第W+2至第W+L+1个符号，其中，W+L+1小于或等于所述资源选择时域单元内总符号数量，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L+1小于或等于所述资源选择时域单元内总符号数量。
可选地，所述第一传输单元，适于当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，确定所述预设位置为所述第二预设位置，否则确定所述预设位置为所述第一预设位置。
可选地，所述终端还包括：第二传输单元，适于当所述预设位置为所述第二预设位置时，在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送所述边链路控制信息对应的边链路数据。
可选地，所述终端还包括：第三传输单元，在所述预设位置的起始时刻发送所述边链路控制信息对应的边链路数据。
可选地，所述终端还包括：第四传输单元，适于在所述预设位置的结束时刻发送所述边链路控制信息对应的边链路数据。
本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述任一种所述方法的步骤。
本发明实施例还提供了一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述任一种所述方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下优点：
采用上述方案，将边链路上用于传输的时频资源的预设位置，作为发送边链路控制信息的时域位置，使得接收终端可以确定边链路控制信息在时频资源上的具体发送位置。并且，应用本发明实施例中的方案，发送终端在时频资源的固定位置上发送边链路控制信息，使得接收终端无需在每个短时间感知成功的可能时刻都盲检边链路控制信息，故可以降低接收终端盲检复杂度，提高接收效率，降低接收终端的功耗。
附图说明
图1是本发明实施例中一种边链路传输方法的流程图；
图2是本发明实施例中一种获取时频资源过程的示意图；
图3至图11为本发明实施例中边链路控制信息及数据的时频发 送位置示意图；
图12是本发明实施例中一种终端的结构示意图。
具体实施方式
在LTE的V2X中，主要采用长时间感知的半静态资源选择方式来获取传输资源。在NR V2X中，由于业务类型的增加，已有的长时间感知的方式无法很好地满足业务需求，因此，提出采用采用短时间感知与长时间感知相结合的半静态资源选择方式，来确定边链路上用于发送控制信息及数据时频资源。
但是，在采用短时间感知与长时间感知相结合的方式，确定时频资源后，如何设置边链路控制信息及数据在所确定的时频资源上的时域发送位置，目前尚未解决。
针对上述问题，本发明实施例提供了一种边链路传输方法，通过将边链路上用于传输的时频资源的预设位置，作为发送边链路控制信息的时域位置，使得接收终端可以确定边链路控制信息在时频资源上的具体发送位置，同时可以使得接收终端无需在每个短时间感知成功的可能时刻都盲检边链路控制信息，故可以降低接收终端盲检复杂度，提高接收效率，降低接收终端的功耗。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例作详细地说明。
参照图1，本发明实施例提供了一种边链路传输方法，所述方法可以包括以下步骤：
步骤11，获取边链路上用于传输的时频资源。
在具体实施中，可以采用多种方式来获取边链路上用于传输的时频资源，具体不作限制。
在本发明的一实施例中，为了更好地满足NR V2X的业务需求， 采用短时间感知与长时间感知相结合的方式，来获取边链路上用于传输的时频资源。下面结合图2具体详细说明：
车联网终端在时刻n启动资源选择或重选。首先，确定资源选择窗C1，时间范围为时刻n+T1至时刻n+T2。车联网终端可以根据时间窗C2内的感知结果，在资源选择窗C1内去除掉不可用的时频资源Z1，选择20％可用的时频资源，作为候选时频资源Z2。其中，0＜T1≤4，20≤T2≤100，长时间感知时间窗C2的时间范围为时刻n-T4至时刻n-T3，T4＞T3＞0。本发明的实施例中，为了便于描述，将时间窗C2称为长时间感知时间窗。
接着，在候选时频资源Z2中再随机选择一个时频资源，在所选择的时频资源上进行短时间感知，短时间感知成功后可以使用所选择的时频资源发送边链路控制信息和数据。车联网终端可以根据业务优先级等其它因素生成一个短时间感知时间窗，但其长度不能超过短时间感知时间窗长度的最大值。
其中，短时间感知过程如下：在时间窗内随机选择一个数值，在该数值指示的持续时间内，车联网终端在候选资源Z2中随机选择的时频资源的频域范围内进行能量测量。在该持续时间内，若能量测量值均低于一个门限值，则认为所选择的时频资源为空闲，未被其它终端占用，所述车联网终端可以选择该时频资源发送边链路控制信息和数据。本发明的实施例中，为了便于描述，将短时间感知过程中的时间窗，称为短时间感知时间窗。
在具体实施中，对于周期业务，终端可以预留当前所获取的时频资源并在边链路控制信息中指示。在下一个周期到来时，所述终端可以直接在自身预留的时频资源的起始时刻发送边链路控制信息，无需再次进行长时间感知与短时间感知。
因此，当在短时间感知时间窗内随机选择一个数值为0时，或者当所获取的时频资源为预留的时频资源时，终端无需进行短时间感知，可直接应用本发明实施例中边链传输方法确定边链路控制信息和 数据的时域发送位置。而对于短时间感知时间窗内随机选择的数值不为0，且所获取的时频资源非预留的时频资源上，终端可以根据随机选择的数值进行短时间感知，进而应用本发明实施例中边链传输方法确定边链路控制信息和数据的时域发送位置。
可以理解的是，无论采用何种方式来获取该时频资源，均不构成对本发明的限制，且均在本发明的保护范围之内。
步骤12，将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
在具体实施中，可以预先将时频资源上的一个或多个固定位置，作为边链路控制信息的时域发送位置。其中，所述预设位置可以采用多种方式进行设定。
在具体实施中，所述时频资源的时域长度可以为一个资源选择时域单元，频域长度为至少一个子信道，一个子信道可以由若干个频域资源块组成。所述资源选择时域单元为一个时隙、多个时隙或多个符号，具体可以由高层配置或预定义。此时，短时间感知时间窗的起始位置即资源选择时域单元的起始位置。
在本发明的一实施例中，所述预设位置可以包括第一预设位置及第二预设位置。所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。换言之，所述第一预设位置的起始时刻早于所述第二预设位置的起始时刻。
在具体实施中，可以根据成功获取所述时频资源的时刻，来确定所述预设位置为第一预设位置或第二预设位置。具体地，当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，可以确定所述预设位置为所述第二预设位置。当所述成功获取所述时频资源的时刻早于或者等于第一预设位置的起始时刻时，确定所述预设位置为所述第一预设位置。
在具体实施中，可以采用多种方式设置所述第一预设位置及第二 预设位置，此处不作限定。终端可以根据边链路控制信息的时域发送位置，调整边链路数据的时域发送位置。通常情况下，边链路控制信息与边链路数据存在对应关系。边链路控制信息内包含成功译码边链路数据的必要信息。终端可以先发送边链路数据，也可以先发送边链路控制信息。
下面结合图3至图9对边链路控制信息与边链路数据的时域发送位置进行详细描述：
首先，假设资源选择时域单元内总符号数量包括N个符号，对应的时间范围为时刻t 0至时刻t N-1。边链路控制信息的时域长度为L个符号为例，L及N均为正整数，可以采用以下几种方式设置边链路控制信息及边链路数据的时域发送位置：
在本发明的一实施例中，参照图3及图4，所述第一预设位置可以为所述资源选择时域单元内前L个符号，对应的时间范围为时刻t 0至t L-1。此时，L≤N。
将所述第一预设位置作为边链路控制信息的时域发送位置时，如图3所示，可以在所述第一预设位置的起始时刻t 0发送相应的边链路数据，如图4所示，也可以在所述第一预设位置结束时刻t L-1发送相应的边链路数据。其中，所述边链路数据通过物理边链路共享信道(Physical sidelink shared Channel，PSSCH)发送，本发明实施例中，为了描述方便，将边链路数据记为PSSCH。
在本发明的另一实施例中，参照图5及图6，当资源选择时域单元的首个符号f 1为保护符号且不能发送其它信息时，所述第一预设位置可以为所述资源选择时域单元内第2个至第L+1个符号，对应的时间范围为符号t 1至t L。其中，L+1≤N。
将所述第一预设位置作为边链路控制信息的时域发送位置时，如图5所示，可以在所述第一预设位置的起始时刻t 1发送相应的边链路数据。如图6所示，也可以在所述第一预设位置结束时刻t L发送相应 的边链路数据。
在本发明的一实施例中，参照图7至图8，所述第二预设位置可以为所述资源选择时域单元内第W+1至第W+L个符号，对应的时间范围为t W-1至t W+L-1。其中，第W个符号为所述资源选择时域单元内时间窗MAX的结束符号，W为正整数，W+L≤N。所述时间窗MAX为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗MAX的起始符号为所述资源选择时域单元的起始符号
将所述第二预设位置作为边链路控制信息的时域发送位置时，如图7所示，可以在所述第二预设位置的起始时刻t W-1发送相应的边链路数据。如图8所示，也可以在所述第二预设位置结束时刻t W+L-1发送相应的边链路数据。
在本发明的另一实施例中，参照图9至图10，当第W+1个符号f w为保护符号且不能发送其它信息时，所述第二预设位置可以为所述资源选择时域单元内第W+2至第W+L+1个符号，对应的实际范围为t W+1至t W+L,。其中，W+L+1≤N。
将所述第二预设位置作为边链路控制信息的时域发送位置时，如图9所示，可以在所述第二预设位置的起始时刻t W+1发送相应的边链路数据。如图10所示，也可以在所述第二预设位置结束时刻t W+L发送相应的边链路数据。
无论所述预设位置为第一预设位置还是第二预设位置，在所述预设位置的起始时刻或结束时刻，发送所述边链路控制信息对应的边链路数据，接收终端可以通过边链路控制信息的起始位置，确定边链路数据的接收位置，而无须在边链路控制信息中使用额外的比特进行指示，有效节省边链路控制信息占用的比特位，进而节约时频资源。
在本发明的一实施例中，为了提高资源利用率，当所述预设位置为所述第二预设位置时，所述方法还可以包括：在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送 所述边链路控制信息对应的边链路数据。例如，参照图11，所述所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻可能为时刻n。
在具体实施中，还可以采用其它方式设置所述第一预设位置及第二预设位置，无论所述第一预设位置及第二预设位置具体如何，只要其为所获取的时频资源上的固定位置，均在本发明的保护范围之内。
由上述内容可知，采用本发明实施例中的边链路传输方法，将边链路上用于传输的时频资源的预设位置，作为发送边链路控制信息的时域位置，使得接收终端可以确定边链路控制信息在时频资源上的具体发送位置，而降低盲检复杂度，提高接收效率，降低接收终端的功耗。
为了使本领域技术人员更好地理解和实现本发明，以下对上述方法对应的装置及计算机可读存储介质进行详细描述。
参照图12，本发明实施例提供了一种终端120，所述终端120可以包括：获取单元1201以及第一传输单元1202。其中：
所述获取单元1201，适于获取边链路上用于传输的时频资源；
所述第一传输单元1202，适于将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
在本发明的一实施例中，所述预设位置可以包括：第一预设位置及第二预设位置；所述第一传输单元，适于根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。
在本发明的一实施例中，所述时频资源的时域长度为一个资源选择时域单元，频域长度为至少一个子信道；所述资源选择时域单元为一个时隙、多个时隙或多个符号。
在本发明的一实施例中，所述第一预设位置为所述资源选择时域单元内前L个符号，其中，L为所述边链路控制信息的时域长度，L为正整数，且L小于或等于所述资源选择时域单元内总符号数量。
在本发明的另一实施例中，所述第一预设位置为所述资源选择时域单元内第2个至第L+1个符号，L为所述边链路控制信息的时域长度，L为正整数，且L+1小于或等于所述资源选择时域单元内总符号数量。
在本发明的又一实施例中，所述第二预设位置为所述资源选择时域单元内第W+1至第W+L个符号，其中，第W个符号为所述资源选择时域单元内时间窗的结束符号，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L小于或等于所述资源选择时域单元内总符号数量；所述时间窗为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗的起始符号为所述资源选择时域单元的起始符号。
在本发明的再一实施例中，所述第二预设位置为所述资源选择时域单元内第W+2至第W+L+1个符号，其中，W+L+1小于或等于所述资源选择时域单元内总符号数量，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L+1小于或等于所述资源选择时域单元内总符号数量。
在具体实施中，所述第一传输单元1202，适于当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，确定所述预设位置为所述第二预设位置，否则确定所述预设位置为所述第一预设位置。
在具体实施中，所述终端120还可以包括：第二传输单元1203，适于当所述预设位置为所述第二预设位置时，在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送所述边链路控制信息对应的边链路数据。
在具体实施中，所述终端120还可以包括：第三传输单元(未示出)，在所述预设位置的起始时刻发送所述边链路控制信息对应的边链路数据。
在具体实施中，所述终端120还可以包括：第四传输单元(未示出)，适于在所述预设位置的结束时刻发送所述边链路控制信息对应的边链路数据。
本发明实施例还提供了另一种计算机可读存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述实施例中任一种所述边链路传输方法的步骤，不再赘述。
在具体实施中，所述计算机可读存储介质可以包括：ROM、RAM、磁盘或光盘等。
本发明实施例还提供了一种用户终端，所述用户终端可以包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述实施例中任一种所述边链路传输方法的步骤，不再赘述。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (24)

  1. 一种边链路传输方法，其特征在于，包括：
    获取边链路上用于传输的时频资源；
    将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
  2. 如权利要求1所述的边链路传输方法，其特征在于，所述预设位置包括：第一预设位置及第二预设位置；
    所述将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，包括：
    根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。
  3. 如权利要求2所述的边链路传输方法，其特征在于，所述时频资源的时域长度为一个资源选择时域单元，频域长度为至少一个子信道；所述资源选择时域单元为一个时隙、多个时隙或多个符号；所述子信道为至少一个频域资源块。
  4. 如权利要求3所述的边链路传输方法，其特征在于，所述第一预设位置为所述资源选择时域单元内前L个符号，其中，L为所述边链路控制信息的时域长度，L为正整数，且L小于或等于所述资源选择时域单元内总符号数量。
  5. 如权利要求3所述的边链路传输方法，其特征在于，所述第一预设位置为所述资源选择时域单元内第2个至第L+1个符号，L为所述边链路控制信息的时域长度，L为正整数，且L+1小于或等于所述资源选择时域单元内总符号数量。
  6. 如权利要求3所述的边链路传输方法，其特征在于，所述第二预设位置为所述资源选择时域单元内第W+1至第W+L个符号，其中， 第W个符号为所述资源选择时域单元内时间窗的结束符号，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L小于或等于所述资源选择时域单元内总符号数量；所述时间窗为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗的起始符号为所述资源选择时域单元的起始符号。
  7. 如权利要求3所述的边链路传输方法，其特征在于，所述第二预设位置为所述资源选择时域单元内第W+2至第W+L+1个符号，其中，W+L+1小于或等于所述资源选择时域单元内总符号数量，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L+1小于或等于所述资源选择时域单元内总符号数量。
  8. 如权利要求2所述的边链路传输方法，其特征在于，所述根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，包括：
    当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，确定所述预设位置为所述第二预设位置，否则确定所述预设位置为所述第一预设位置。
  9. 如权利要求8所述的边链路传输方法，其特征在于，当所述预设位置为所述第二预设位置时，还包括：
    在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送所述边链路控制信息对应的边链路数据。
  10. 如权利要求2所述的边链路传输方法，其特征在于，还包括：
    在所述预设位置的起始时刻发送所述边链路控制信息对应的边链路数据。
  11. 如权利要求2所述的边链路传输方法，其特征在于，还包括：
    在所述预设位置的结束时刻发送所述边链路控制信息对应的边链路数据。
  12. 一种终端，其特征在于，包括：
    获取单元，适于获取边链路上用于传输的时频资源；
    第一传输单元，适于将所述时频资源上的预设位置作为边链路控制信息的时域发送位置，在所述边链路上发送所述边链路控制信息。
  13. 如权利要求12所述的终端，其特征在于，所述预设位置包括：第一预设位置及第二预设位置；所述第一传输单元，适于根据成功获取所述时频资源的时刻，确定所述预设位置为第一预设位置或第二预设位置，所述第一预设位置的起始位置在时域上早于所述第二预设位置的起始位置。
  14. 如权利要求13所述的终端，其特征在于，所述时频资源的时域长度为一个资源选择时域单元，频域长度为至少一个子信道；所述资源选择时域单元为一个时隙、多个时隙或多个符号；所述子信道为至少一个频域资源块。
  15. 如权利要求14所述的终端，其特征在于，所述第一预设位置为所述资源选择时域单元内前L个符号，其中，L为所述边链路控制信息的时域长度，L为正整数，且L小于或等于所述资源选择时域单元内总符号数量。
  16. 如权利要求14所述的终端，其特征在于，所述第一预设位置为所述资源选择时域单元内第2个至第L+1个符号，L为所述边链路控制信息的时域长度，L为正整数，且L+1小于或等于所述资源选择时域单元内总符号数量。
  17. 如权利要求14所述的终端，其特征在于，所述第二预设位置为所述资源选择时域单元内第W+1至第W+L个符号，其中，第W个符号为所述资源选择时域单元内时间窗的结束符号，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L小于或等于所述资源选择时域单元内总符号数量；所述时间窗为在所述资源选择时域单元内允许进行资源感知的最大时间长度，所述时间窗的起始符号为所 述资源选择时域单元的起始符号。
  18. 如权利要求14所述的终端，其特征在于，所述第二预设位置为所述资源选择时域单元内第W+2至第W+L+1个符号，其中，W+L+1小于或等于所述资源选择时域单元内总符号数量，L为所述边链路控制信息的时域长度，W及L均为正整数，W+L+1小于或等于所述资源选择时域单元内总符号数量。
  19. 如权利要求13所述的终端，其特征在于，所述第一传输单元，适于当所述成功获取所述时频资源的时刻晚于所述第一预设位置的起始时刻时，确定所述预设位置为所述第二预设位置，否则确定所述预设位置为所述第一预设位置。
  20. 如权利要求19所述的终端，其特征在于，还包括：第二传输单元，适于当所述预设位置为所述第二预设位置时，在所在的时间窗内成功获取所述时频资源后的第一个符号或第二个符号的起始时刻发送所述边链路控制信息对应的边链路数据。
  21. 如权利要求13所述的终端，其特征在于，还包括：第三传输单元，在所述预设位置的起始时刻发送所述边链路控制信息对应的边链路数据。
  22. 如权利要求13所述的终端，其特征在于，还包括：第四传输单元，适于在所述预设位置的结束时刻发送所述边链路控制信息对应的边链路数据。
  23. 一种计算机可读存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至11任一项所述方法的步骤。
  24. 一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至11任一项所述方法的步骤。
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