CN110149720B - Method, device, medium and terminal for uplink LBT (local binary transmission) - Google Patents

Method, device, medium and terminal for uplink LBT (local binary transmission) Download PDF

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Publication number
CN110149720B
CN110149720B CN201810153161.2A CN201810153161A CN110149720B CN 110149720 B CN110149720 B CN 110149720B CN 201810153161 A CN201810153161 A CN 201810153161A CN 110149720 B CN110149720 B CN 110149720B
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monitored
beams
monitoring
uplink
data transmission
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CN110149720A (en
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王化磊
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • 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
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The embodiment of the invention discloses a method, a device, a medium and a terminal for uplink LBT, wherein the method comprises the following steps: determining a beam direction to be monitored of one or more beams to be monitored, wherein the beam to be monitored is selected from beams in an unlicensed spectrum range; and monitoring the one or more beams to be monitored to determine beams suitable for data transmission. The technical scheme of the invention can carry out uplink LBT under the NR scene.

Description

Method, device, medium and terminal for uplink LBT (local binary transmission)
Technical Field
The embodiments of the present invention relate to the field of communications, and in particular, to a method, an apparatus, a medium, and a terminal for uplink LBT.
Background
The 3rd Generation Partnership Project (3 GPP) is currently introducing New Radio access technology (NR), including at least fifth Generation mobile communication technology (5G).
In the wireless technology, in order to improve the quality of communication service, communication may be performed using an unlicensed spectrum, that is, a Licensed Assisted Access (LAA) technology. Listen Before Talk (LBT) technology is an important part of unlicensed spectrum communication technology. So far, LAAs based on LTE protocols have had many new features over the original LAAs.
With the evolution of communication technologies, NR-based unlicensed spectrum communication technologies become a new technological hotspot. Based on the new properties of NR, LBT techniques need to be adapted accordingly. However, there is currently no LBT technique in the NR scenario.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to carry out uplink LBT in an NR scene.
In order to solve the above technical problem, an embodiment of the present invention provides a method for uplink LBT in an NR scenario.
Optionally, determining a beam direction to be monitored of one or more beams to be monitored, wherein the beam to be monitored is selected from beams in an unlicensed spectrum range; and monitoring the one or more beams to be monitored to determine beams suitable for data transmission.
Optionally, the determining a beam direction to be listened for one or more beams to be listened includes: acquiring beam direction information from a base station side; and determining the beam direction to be monitored of the one or more beams to be monitored according to the beam direction information.
Optionally, the beam direction information is acquired by an authorized primary cell.
Optionally, the beam direction information is obtained through at least one of PDCCH, MAC-CE and RRC in the authorized primary cell.
Optionally, the beam direction information is acquired by an unauthorized LAA.
Optionally, the beam direction information is acquired through at least one of a PDCCH, a MAC-CE, and an RRC carried by the unlicensed LAA.
Optionally, the acquiring the beam direction information by using the PDCCH includes: and acquiring the beam direction information through the TCI state in the DCI.
Optionally, the determining a beam direction to be listened for one or more beams to be listened further includes: and reporting the monitoring capability to a base station side before receiving the beam direction information of the base station side, wherein the number of the beam directions contained in the beam direction information is determined according to the monitoring capability.
Optionally, the determining the beam direction of one or more beams to be listened to includes: and determining the direction of the uplink beam which carries out uplink transmission at the last time as the direction of the beam to be monitored.
Optionally, the determining the beam direction of one or more beams to be listened to includes: and determining to send any type of uplink beam of SRS, PUSCH and PUCCH in the uplink beam which is transmitted last time, and taking the direction of the uplink beam as the direction of the beam to be monitored.
Optionally, the determining the beam direction of one or more beams to be listened to includes: and determining a downlink beam which receives downlink transmission at the last time, and taking the direction of an uplink beam corresponding to the downlink beam or the direction of the downlink beam as the direction of the beam to be monitored.
Optionally, the determining the beam direction of one or more beams to be listened to includes: and in the downlink beam which receives downlink transmission for the last time, determining to receive any type of downlink beam of CSI-RS, SSB, PDCCH, PDSCH and DRS, and taking the direction of the uplink beam corresponding to the downlink beam or the direction of the downlink beam as the direction of the beam to be monitored.
Optionally, the listening for the one or more beams to be listened includes: and monitoring a beam to be monitored at the same time.
Optionally, the monitoring a beam to be monitored at the same time includes: after determining that one beam to be monitored is not suitable for data transmission, finishing monitoring the beam to be monitored; and after the monitoring of the beam to be monitored is finished, starting to monitor another beam to be monitored.
Optionally, determining that one beam to be listened to is not suitable for data transmission includes: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission.
Optionally, the listening for the one or more beams to be listened includes: determining the window duration of a time window; monitoring any beam to be monitored in the window duration; after the monitoring of any beam to be monitored is finished, or before the monitoring of any beam to be monitored is finished, starting monitoring another beam to be monitored in the window time length, wherein the monitoring is finished, and the condition that the beam to be monitored does not meet the condition suitable for data transmission in the window time length is included.
Optionally, the listening for the one or more beams to be listened includes: and monitoring a plurality of beams to be monitored at the same time.
Optionally, monitoring a plurality of beams to be monitored at the same time includes: and simultaneously starting to monitor all the beams to be monitored until the beams suitable for data transmission are found in all the beams to be monitored, or confirming that all the beams to be monitored are not suitable for data transmission.
Optionally, the suitability for data transmission is determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods.
Optionally, the number of the additional delay durations is determined according to priorities of different beams to be monitored, and the higher the priority of the beams to be monitored is, the smaller the number of the additional delay durations to be measured is.
Optionally, the priority of the different beams to be listened to is determined according to the priority of the terminal transmitting on the LAA.
Optionally, the monitoring multiple beams to be monitored at the same time includes: monitoring each beam to be monitored in the delay time; setting Ni＝NinitIn which N isiCorresponding to each beam direction to be monitored, i belongs to m, m is the number of beams to be monitored, NinitIs the interval [0, CW]The CW is configured according to the priority transmitted by the terminal on the LAA; for each beam direction to be monitored, if any N isiA value of 0, and the NiIf all time slots corresponding to the beams to be monitored are idle in the delay time length, the N is confirmediThe corresponding beam to be monitored is suitable for data transmission; for each beam direction to be monitored, if N isi> 0, and grant NiWhen the value is changed, N is obtainedi＝Ni-1; repeating the pair N when the monitoring result is idle in the time slot of the additional delay duration in the beam monitoring directioniAnd (5) judging the value.
Optionally, the uplink LBT method further includes: and carrying out data transmission by utilizing the beam to be monitored suitable for carrying out data transmission.
The embodiment of the invention provides an uplink LBT device, which comprises: a beam direction determining unit, adapted to determine a beam direction to be monitored of one or more beams to be monitored, the beam to be monitored being selected from beams within an unlicensed spectrum range; and the monitoring unit is suitable for monitoring the one or more beams to be monitored so as to determine the beams suitable for data transmission.
Optionally, the beam direction determining unit includes: a beam direction information obtaining subunit adapted to obtain beam direction information from the base station side; a determining subunit, adapted to determine a beam direction to be monitored of the one or more beams to be monitored according to the beam direction information.
Optionally, the beam direction information acquiring subunit is adapted to acquire the beam direction information through an authorized primary cell.
Optionally, the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of PDCCH, MAC-CE and RRC in the authorized primary cell.
Optionally, the beam direction information acquiring subunit is adapted to acquire the beam direction information by means of an unauthorized LAA.
Optionally, the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of a PDCCH, a MAC-CE, and an RRC carried by an unlicensed LAA.
Optionally, the obtaining, by the beam direction information obtaining subunit, the beam direction information through a PDCCH includes: and acquiring the beam direction information through the TCI state in the DCI.
Optionally, the beam direction determining unit further includes: and the monitoring capability reporting unit is suitable for reporting the monitoring capability to the base station side before receiving the beam direction information of the base station side, wherein the number of the beam directions contained in the beam direction information is determined according to the monitoring capability.
Optionally, the beam direction determining unit is adapted to determine a direction of an uplink beam that has performed uplink transmission last time as the beam direction to be monitored.
Optionally, the beam direction determining unit is adapted to determine, in an uplink beam that has been uplink transmitted last time, to transmit an uplink beam of any one of SRS, PUSCH, and PUCCH, and take a direction of the uplink beam as the beam direction to be monitored.
Optionally, the beam direction determining unit is adapted to determine a downlink beam that has received downlink transmission last time, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
Optionally, the beam direction determining unit is adapted to determine, in a downlink beam that has received downlink transmission last time, that any one type of downlink beam among CSI-RS, SSB, PDCCH, PDSCH, and DRS is received, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
Optionally, the listening unit is adapted to listen to one beam to be listened to at the same time.
Optionally, the monitoring unit is adapted to, after determining that one beam to be monitored is not suitable for data transmission, end monitoring of the beam to be monitored, and after ending monitoring of the beam to be monitored, start monitoring another beam to be monitored.
Optionally, determining that one beam to be listened to is not suitable for data transmission includes: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission.
Optionally, the listening unit includes: a window duration determining subunit adapted to determine a window duration of the time window; the window monitoring subunit is suitable for monitoring any beam to be monitored in the window duration; and the window monitoring new subunit is suitable for starting monitoring of another beam to be monitored in the window time length after the monitoring of any beam to be monitored is finished or before the monitoring of any beam to be monitored is finished, wherein the monitoring is finished and the beam to be monitored does not meet the condition suitable for data transmission in the window time length.
Optionally, the listening unit is adapted to listen to a plurality of beams to be listened to at the same time.
Optionally, the listening unit is adapted to start listening to all beams to be listened to simultaneously until a beam suitable for data transmission is found in all beams to be listened to, or it is confirmed that all beams to be listened to are not suitable for data transmission.
Optionally, the suitability for data transmission is determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods.
Optionally, the number of the additional delay durations is determined according to priorities of different beams to be monitored, and the higher the priority of the beams to be monitored is, the smaller the number of the additional delay durations to be measured is.
Optionally, the priority of the different beams to be listened to is determined according to the priority of the terminal transmitting on the LAA.
Optionally, the listening unit includes: the delay time monitoring subunit is suitable for monitoring each beam to be monitored in the delay time; a variable setting subunit adapted to set Ni＝NinitIn which N isiCorresponding to each beam direction to be monitored, i belongs to m, m is the number of beams to be monitored, NinitIs the interval [0, CW]The CW is configured according to the priority transmitted by the terminal on the LAA; a confirmation subunit, for each beam direction to be monitored, if any NiA value of 0, and the NiIf all time slots corresponding to the beams to be monitored are idle in the delay time length, the N is confirmediThe corresponding beam to be monitored is suitable for data transmission; the variable value changes the sub-unit, for each beam direction to be monitored, if Ni> 0, and grant NiWhen the value is changed, N is obtainedi＝Ni-1; a repeating subunit adapted to repeat the pair N when the monitoring result is idle in the time slot of the additional delay duration in the monitoring beam directioniAnd (5) judging the value.
Optionally, the uplink LBT apparatus further includes: and the data transmission unit is suitable for carrying out data transmission by utilizing the beam to be monitored which is suitable for carrying out data transmission.
An embodiment of the present invention provides a computer-readable storage medium, on which computer instructions are stored, where the computer instructions are executed when running to perform any of the steps of the uplink LBT method described above.
The embodiment of the present invention provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and is characterized in that, when the processor executes the computer instruction, the processor executes any of the above steps of the uplink LBT method.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the NR scenario, data transmission may be based on multiple beams, with different beam directions for different beams. In the embodiment of the present invention, the beam direction of one or more beams to be monitored, that is, the beam direction to be monitored, is determined, so that a beam to be monitored that needs to be monitored can be determined, one or more beams to be monitored are monitored, so as to determine a beam suitable for data transmission, and further, uplink LBT in an NR scenario can be completed.
Furthermore, the beam direction information of the base station side is received, and the direction of the beam to be monitored of one or more beams to be monitored is determined according to the beam direction information, so that the LBT process is more targeted, and the probability of monitoring the idle beam in the LBT process is improved.
Drawings
Fig. 1 is a flowchart of an uplink LBT method according to an embodiment of the present invention;
fig. 2 is a flowchart of a specific implementation of monitoring, by a terminal, a beam to be monitored in an embodiment of the present invention;
FIG. 3 is a diagram illustrating a time domain distribution of a time window in an embodiment of the present invention;
fig. 4 is a flowchart of another specific implementation of the terminal monitoring a beam to be monitored in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of an uplink LBT apparatus according to an embodiment of the present invention;
fig. 6 is a schematic diagram of time distribution for listening to beams to be listened to in the embodiment of the present invention.
Detailed Description
As described above, the NR-based unlicensed spectrum communication technology has become a new technology hotspot. Based on the new properties of NR, LBT techniques need to be adapted accordingly. However, there is currently no LBT technique based on beam direction in NR scenarios.
In the NR scenario, data transmission may be performed based on a plurality of beams, which may be distinguished by the type and sequence number of the RS carrying the beam. The beam directions of the different beams are different. The beam direction in the embodiment of the present invention may be distinguished by spatial configuration (spatial configuration) of resources carrying any one or more of a channel state information Reference Signal (CSI-RS), a channel Sounding Signal (SRS), a Tracking Reference Signal (TRS), a synchronization Signal and broadcast channel Block (SS/PBCH Block, SSB), and a Discovery Reference Signal (DRS).
For example, the PDCCH, PDSCH, PRACH, PUCCH, or PUSCH may be associated with any one or more of the above-mentioned reference signals, and indicate that they have the same spatial configuration (spatial configuration), so that the transmission or reception beam direction thereof may be determined. In addition, the spatial configuration (spatial configuration) of any one of the resources in the reference signal may be associated with the spatial configuration (spatial configuration) of another one of the resources in the reference signal, indicating that they have the same spatial configuration (spatial configuration), and may determine the transmission or reception beam direction. The following directions related to transmission or reception of channels PDCCH, PDSCH, PRACH, PUCCH, PUSCH, uplink transmission, downlink transmission and various reference signals may be determined by their associated CSI-RS resources (or CSI-RS resource set or CSI-RS), TRS resources (or TRS resource set or TRS), SSBs, SRS resources (or SRS resource set or SRS) or DRSs (or DRS resource set).
In the embodiment of the present invention, the beam direction of one or more beams to be monitored, that is, the beam direction to be monitored, is determined, so that a beam to be monitored that needs to be monitored can be determined, one or more beams to be monitored are monitored, so as to determine a beam suitable for data transmission, and further, uplink LBT in an NR scenario can be completed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a method for uplink LBT in an embodiment of the present invention, which specifically includes the following steps:
step S11, determining the beam direction to be monitored of one or more beams to be monitored, wherein the beams to be monitored are selected from beams in an unlicensed spectrum range;
and step S12, listening to the one or more beams to be listened to determine a beam suitable for data transmission.
The beam to be monitored is an uplink beam, the direction of the beam to be monitored is the direction of the beam to be monitored, and the beam to be monitored is referred to as the direction of the beam to be monitored for convenience of description. In a specific implementation, the beam direction to be monitored may be determined by the terminal, or may also be determined according to an instruction from the base station side, which is separately described below.
In a specific implementation, the beam direction to be monitored can be determined according to the beam direction information acquired from the base station side. The beam direction information is information used by the base station side to inform the terminal of the beam direction of the uplink LBT suitable for the terminal. After the terminal acquires the beam direction information, the terminal may determine the beam direction to be monitored of one or more beams to be monitored according to the information.
Specifically, the terminal may determine the number of beams to be monitored in combination with the monitoring capability of the own party for monitoring. For example, the base station side informs the terminal that uplink LBT can be performed in 5 beam directions, but the terminal can only monitor 2 beam directions, and then may determine the 2 beam directions as beam directions to be monitored.
Or, the terminal may report the monitoring capability to the base station side, and notify the base station side of the upper limit of the number of beam directions that the own party can monitor, and the base station side determines the number of beam directions included in the beam direction information according to the monitoring capability when indicating the terminal.
In particular implementations, the beam direction information may be indicated by the authorized primary cell. Further, the beam direction information may be indicated by at least one of a Physical Downlink Control Channel (PDCCH), a Media Access Control-Control Element (MAC-CE), and a Radio Resource Control (RRC) in the authorized primary cell. Accordingly, the terminal may acquire the beam direction information through at least one of PDCCH, MAC-CE, and RRC in the licensed primary cell.
Further, when the beam direction Information is indicated by using the PDCCH, a single region may be set in Downlink Control Information (DCI) to indicate a Transmission Configuration Indication (TCI) state to indicate the beam direction Information.
Wherein, one or more TCI states may be included in the DCI. Each TCI state may contain one or more CSI-RS resources (or sets of CSI-RS resources or CSI-RSs), TRS resources (or sets of TRS resources or TRSs), SSBs, SRS resources (or sets of SRS resources or SRSs), or DRSs (or sets of DRS resources or DRS resources). When a plurality of TCI states may be included in the DCI, the base station side may indicate a plurality of beam directions to the terminal. Or when the DCI includes one TCI state, but the TCI contains multiple CSI-RS resources (or CSI-RS resource sets or CSI-RSs), TRS resources (or TRS resource sets or TRSs), SSBs, SRS resources (or SRS resource sets or SRSs), or DRSs (or DRS resources or DRS resource sets), the base station side may indicate multiple beam directions to the terminal.
Accordingly, the terminal may perform an LBT procedure in a beam direction of receiving CSI-RS resources (or CSI-RS resource set or CSI-RS), TRS resources (or TRS resource set or TRS), SSB, or DRS (or DRS resources or DRS resource set), or may perform an LBT procedure in a direction of transmitting SRS resources (or SRS resource set or SRS) by the terminal. That is, the beam direction to be listened to may be selected from: a set of directions in one or more TCI states determined by CSI-RS resources (or a set of CSI-RS resources or CSI-RS), TRS resources (or a set of TRS resources or TRS), SSBs, SRS resources (or a set of SRS resources or SRS), or DRSs (or a set of DRS resources or DRS resources).
As described above, when the terminal reports its monitoring capability to the base station side, the number of beam directions included in the beam direction information may be determined according to the monitoring capability. For example, the number of TCI states included in the DCI may match the listening capability reported by the terminal.
The terminal may indicate its listening capability, that is, the maximum number of supported listening beams, by reporting, to the base station, the maximum number of supported SRS resources (or SRS resource sets or SRSs), or the maximum number of supported CSI-RS resources (or CSI-RS resource sets or CSI-RSs), or the maximum number of supported TRS resources (or TRS resource sets or TRSs), or the maximum number of supported SSBs, or the maximum number of supported DRS (or DRS resources or DRS resource sets).
In another implementation, the base station side may indicate the beam direction information through an unlicensed LAA carrier. Specifically, the beam direction information may be indicated by at least one of PDCCH, MAC-CE, and RRC carried by the unlicensed LAA. Accordingly, the terminal may acquire the beam direction information through at least one of a PDCCH, a MAC-CE, and an RRC carried by the unlicensed LAA.
Similar to indicating the beam direction information through the authorized primary cell, when the indication of the beam direction information is performed using the PDCCH, a region may be set in the DCI to indicate the TCI status, thereby indicating the beam direction information to the terminal.
Further, one or more TCI states may be included in the DCI. Each TCI state may contain one or more CSI-RS resources (or sets of CSI-RS resources or CSI-RSs), TRS resources (or sets of TRS resources or TRSs), SSBs, SRS resources (or sets of SRS resources or SRSs), or DRSs (or sets of DRS resources or DRS resources). Or when the DCI includes one TCI state, but the TCI contains multiple CSI-RS resources (or CSI-RS resource sets or CSI-RSs), TRS resources (or TRS resource sets or TRSs), SSBs, SRS resources (or SRS resource sets or SRSs), or DRSs (or DRS resources or DRS resource sets), the base station side may indicate multiple beam directions to the terminal.
Accordingly, the terminal may perform an LBT procedure in a beam direction of receiving CSI-RS resources (or CSI-RS resource set or CSI-RS), TRS resources (or TRS resource set or TRS), SSBs, or DRSs (or DRS resources or DRS resource set), or may perform an LBT procedure in a direction of transmitting SRS resources (or SRS resource set or SRS) by the terminal.
In a specific implementation, the PDCCH may be a PDCCH that is transmitted last time by the UE on an unlicensed LAA bearer or a cell. Similarly, the MAC-CE may be the MAC-CE that was last transmitted by the corresponding UE on the unlicensed LAA bearer or on the cell.
In a specific implementation, the terminal may also directly determine the beam direction of the beam to be monitored, which is separately described below.
In a specific implementation, the terminal may determine that the direction of the uplink beam that has performed uplink transmission last time is the beam direction to be monitored. The direction of the uplink beam which has performed uplink transmission last time may be one or more.
Further, the terminal may determine to transmit any one type of uplink beam of SRS, PUSCH, and PUCCH in the uplink beam that has been last uplink transmitted, and use the direction of the one or more uplink beams as the beam direction to be monitored. The uplink beam for transmitting the SRS may be an uplink beam for transmitting any one of the SRS, the SRS resource, and the SRS resource set.
In another specific implementation, the terminal may determine a downlink beam that has received downlink transmission last time, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
Further, the terminal may determine to receive one or more downlink beams of any type of CSI-RS, SSB, PDCCH, PDSCH, and DRS in the downlink beam that has received the downlink transmission most recently, and take the direction of the uplink beam corresponding to the one or more downlink beams as the beam direction to be monitored. The receiving of the uplink beam of the CSI-RS type may include receiving the uplink beam of any one of a CSI-RS, a CSI-RS resource, and a CSI-RS resource set; receiving the uplink beam of the DRS type may include receiving an uplink beam of any one of a DRS, a DRS resource, and a DRS resource set.
It will be appreciated by those skilled in the art that in LTE-LAA, where DRS are present for purposes of UE synchronization, channel measurement, etc., the DRS includes PSS, SSS and CRS, and optionally CSI-RS.
And in NR-LAA, the DRS may be any combination of: PSS and SSS; PSS, SSS and PBCH; PSS, SSS, and TRS; PSS, SSS, PBCH, and TRS; PSS, SSS and CSI-RS; PSS, SSS, PBCH and CSI-RS. Alternatively, DRS may be other combinations.
In addition, various signals, channels and other technical terms mentioned in the embodiments of the present invention may be the same as or similar to those in LTE, or may also be different from LTE, but may implement similar functions.
The above describes how the terminal obtains the possible directions of the beams to be monitored and the obtaining manner, which may be used singly or in combination according to the needs.
In a specific implementation, the beam direction to be monitored may be determined by combining the monitoring capability of the terminal itself. In the listening, the terminal may listen to only one beam direction at the same time, or may listen to a plurality of beam directions at the same time, which will be described in more detail below.
In one specific implementation, the terminal monitors a beam to be monitored at the same time. Specifically, the terminal may end monitoring the beam to be monitored after determining that the beam to be monitored is not suitable for data transmission; and after the monitoring of the beam to be monitored is finished, starting to monitor another beam to be monitored.
Determining that one beam to be monitored is not suitable for data transmission may include: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission. This implementation may be applied when the listening capability of the terminal is limited, for example, when the terminal can listen to beams in only one direction at the same time, or the implementation may be selected according to the configuration of the terminal.
In another specific implementation, referring to fig. 2, the listening, by the terminal, of the one or more beams to be listened may include the following steps:
step S21, determining the window duration of the time window;
step S22, monitoring any beam to be monitored in the window duration;
step S23, after the end of monitoring any beam to be monitored, or before the end of monitoring any beam to be monitored, start monitoring another beam to be monitored within the window duration.
When the monitoring of any beam to be monitored is finished, the beam to be monitored does not meet the condition suitable for data transmission in the window duration. The window duration of the time window may be configured by higher layer signaling (such as RRC) or MAC-CE or PDCCH. In addition, the window duration of the time window may also be a Timer (Timer), which may be configured by higher layer signaling (e.g. RRC), MAC-CE, or PDCCH, and stops when the Timer expires (Timer expires) to confirm that all the beams to be monitored are not suitable for data transmission.
Before the monitoring of any beam to be monitored is finished, the beam to be monitored does not meet the condition suitable for data transmission yet in the process of monitoring the beam to be monitored, and the monitoring time is less than the window duration. Therefore, when any one or more beams to be monitored are monitored, the condition for starting monitoring another beam to be monitored in the window duration is that none of the beams to be monitored which are monitoring meets the condition suitable for data transmission.
In a specific implementation, a fixed time duration may be set, and after the monitoring on the previous beam to be monitored is started, the monitoring is started, and after the fixed time duration is waited, if none of the previous beams to be monitored meets the condition suitable for data transmission, the monitoring on a new beam to be monitored in the window time duration is started.
Similar to the window duration, the fixed duration may be configured through higher layer signaling (such as RRC) or MAC-CE or PDCCH. In addition, the fixed duration may also be a Timer (Timer), which may be configured by higher layer signaling (e.g., RRC), MAC-CE, or PDCCH, and when the Timer expires (Timer expires), the fixed duration is determined to be reached, and whether to start monitoring the new beam to be monitored is determined.
For further explanation in conjunction with fig. 2 and 3, fig. 3 shows 3 time windows, time window W1, time window W2, and time window W3. And monitoring different beams to be monitored in each time window. At time T1, the terminal listens to one beam to be listened to, and at time T2, the terminal listens to two beams to be listened to simultaneously. By setting the length of the time window and the initial position for monitoring the next beam to be monitored, the number of beams monitored by the terminal at the same time can be controlled, and the efficiency of the uplink LBT method can be improved.
In fig. 3, after a beam to be monitored starts to be monitored in the time window W1, a fixed time period t is waited for3Then, if the beam monitored in the time window W1 does not satisfy the condition for data transmission, (or the duration of the time window W1 is over), monitoring another beam to be monitored in the time window W2 is started. After listening to a beam to be listened to in the time window W2 is started, if the duration of the time window W1 has ended (or the beam listening in the time window W1 has not yet satisfied the condition suitable for data transmission), and the beam listening in the time window W2 has not satisfied the condition suitable for data transmission (or the duration of the time window W2 has ended), then listening to another beam to be listened to in the time window W3 is started.
In a specific implementation, the window duration may not be set for each beam to be monitored, and the total window duration may be set for all beams, for example, referring to fig. 6, after monitoring the beam to be monitored B1, the fixed duration t may be waited for3If the beam B1 to be monitored does not satisfy the condition suitable for data transmission, then starting monitoring the beam B2 to be monitored; waiting for a fixed time duration t again after listening to the beam B2 to be listened3If the condition for data transmission is not satisfied by the beam B1 to be listened to and the condition for data transmission is not satisfied by the listening beam B2, then listening to the beam B3 to be listened to is started.
The process of listening to each beam may be stopped at finding a beam suitable for data transmission among all beams to be listened to, or confirming that all beams to be listened to are not suitable for data transmission. For example, the window duration t can be set4During the time period, if no wave suitable for data transmission is foundAnd stopping monitoring all beams to be monitored.
In other specific implementations, the terminal may also monitor multiple beams to be monitored at the same time.
Specifically, the monitoring of the multiple beams to be monitored at the same time may be started simultaneously until a beam suitable for data transmission is found in all the beams to be monitored; or may stop according to the configuration, for example, when all the beams to be listened to are determined to be not suitable for data transmission within a predetermined time. Wherein the predetermined time may be configured through higher layer signaling (such as RRC) or MAC-CE or PDCCH. In addition, the predetermined time may be a Timer (Timer), which may be configured by higher layer signaling (e.g. RRC) or MAC-CE or PDCCH, and stops when the Timer expires (Timer expires) to confirm that all the beams to be monitored are not suitable for data transmission. Further, the suitability for data transmission may be determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods. The number of the additional delay durations can be determined according to the priorities of different beams to be monitored, and the higher the priority of the beams to be monitored, the smaller the number of the additional delay durations to be measured.
Further, the priority of the beam to be monitored can be determined according to the priority of the terminal transmitting on the LAA, or the beam level configuration can be performed through higher layer signaling (such as RRC) or MAC-CE or PDCCH.
Fig. 4 is a partial flowchart of another specific implementation of the terminal to listen to the beam to be listened to in the embodiment of the present invention, where Step1 to Step6 may be included.
Step1, setting Ni＝NinitIn which N isiCorresponding to each beam direction to be listened to.
Wherein i belongs to m, m is the number of beams to be monitored, NinitIs the interval [0, CW]According to the priority of terminal transmission on LAAAnd (4) placing.
Step4, determine whether there is any NiIf there is any N, the value of (A) is 0iIf it is 0, it is ended, otherwise, Step2 is executed.
Step2, for each beam direction to be monitored, if N isi> 0, and grant NiWhen the value varies, N is madei＝Ni-1。
And Step3, judging whether the monitoring result in the time slot with the additional delay time length is idle, if so, executing Step4, otherwise, executing Step 5.
And judging whether the monitoring result in the time slot with the additional delay time length is idle or not, wherein the judgment is carried out on all the time slots of each beam to be monitored in the additional delay time length.
Step4, if any N is presentiAt a value of 0, stop, otherwise Step2 is executed.
Step5 listens until a busy slot is detected for an additional delay period, or all slots are free for an additional delay period.
Here, the listening in Step5 is continued for each beam to be listened whose listening result in Step3 is not idle.
Step6, if all slots are free within an additional delay period, then Step4 is executed, otherwise Step5 is executed.
In the specific implementation, if the monitoring result for any beam to be monitored in the delay duration is idle, and in Step4, its corresponding N isiThe value is 0 first, it can be determined that the beam to be listened to is suitable for data transmission. Listening to the other beams to be listened to may be stopped at this point.
The time domain length of the delay duration (defer duration) and the additional delay duration (additional delay duration), the relationship between the delay duration and the additional delay duration, and how to determine that one beam to be monitored is idle in the two beams, may refer to the configuration of the beam in LTE. It should be noted that specific parameter values of parameters appearing in the configuration in LTE are merely exemplary descriptions, and the present invention is not limited thereto, and in the case of satisfying the above similar rules, values of related parameters are other parameter values, which also belongs to the protection scope of the present invention.
The method for determining whether each beam to be monitored performs data transmission in the embodiment of the present invention may also be applied to the foregoing scenario in which a beam to be monitored is monitored at the same time, and may also be applied to the foregoing scenario in which a beam to be monitored is monitored by setting a time window.
In a specific implementation, after determining a beam to be monitored suitable for data transmission, the terminal may perform uplink data transmission using the beam.
In NR systems, the types of unlicensed spectrum supported are generally divided into two categories: one is an independent LAA (standalon LAA) and the other is a non-independent LAA (non-standalon LAA). Wherein, the latter clock is configured with a licensed primary cell (licensed pcell), which can assist in the transmission of some channels or reference signals or configuration information. The uplink LBT method in the embodiment of the invention is applicable to both the two scenes.
An embodiment of the present invention further provides an uplink LBT device, which is applicable to a terminal, and a schematic structural diagram of the uplink LBT device is shown in fig. 5, where the uplink LBT device specifically includes:
a beam direction determining unit 51 adapted to determine a beam direction to be listened for one or more beams to be listened for, the beams to be listened for being selected from beams in an unlicensed spectrum range;
a listening unit 52 adapted to listen to the one or more beams to be listened to determine a beam suitable for data transmission.
In a specific implementation, the beam direction determining unit 51 may include: a beam direction information obtaining subunit adapted to obtain beam direction information from the base station side; a determining subunit, adapted to determine a beam direction to be monitored of the one or more beams to be monitored according to the beam direction information.
In a specific implementation, the beam direction information obtaining subunit is adapted to obtain the beam direction information through an authorized primary cell.
In a specific implementation, the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of PDCCH, MAC-CE and RRC in the authorized primary cell.
In a specific implementation, the beam direction information acquiring subunit is adapted to acquire the beam direction information through an unauthorized LAA.
In a specific implementation, the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of a PDCCH, a MAC-CE, and an RRC carried by an unlicensed LAA.
In a specific implementation, the obtaining, by the beam direction information obtaining subunit, the beam direction information through a PDCCH may include: and obtaining through TCI state in DCI.
In a specific implementation, the beam direction determining unit 51 further includes: and the monitoring capability reporting unit is suitable for reporting the monitoring capability to the base station side before receiving the beam direction information of the base station side, wherein the number of the beam directions contained in the beam direction information is determined according to the monitoring capability.
In a specific implementation, the beam direction determining unit 51 is adapted to determine the direction of the uplink beam that has performed uplink transmission last time as the beam direction to be monitored.
In a specific implementation, the beam direction determining unit 51 is adapted to determine, in an uplink beam that has last been uplink transmitted, to transmit any one type of uplink beam among SRS, PUSCH, and PUCCH, and take the direction of the uplink beam as the beam direction to be monitored.
In a specific implementation, the beam direction determining unit 51 is adapted to determine a downlink beam that has received a downlink transmission last time, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
In a specific implementation, the beam direction determining unit 51 is adapted to determine, in a downlink beam that has received downlink transmission most recently, that any type of downlink beam among CSI-RS, SSB, PDCCH, PDSCH, and DRS is received, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
In a specific implementation, the listening unit 52 is adapted to listen to a beam to be listened to at the same time.
In a specific implementation, the monitoring unit 52 is adapted to, after determining that one beam to be monitored is not suitable for data transmission, end monitoring on the beam to be monitored, and after ending monitoring on the beam to be monitored, start monitoring on another beam to be monitored.
In a specific implementation, determining that one beam to be listened to is not suitable for data transmission may include: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission.
In a specific implementation, the listening unit 52 may include: a window duration determining subunit adapted to determine a window duration of the time window; the window monitoring subunit is suitable for monitoring any beam to be monitored in the window duration; and the window monitoring new subunit is suitable for starting monitoring of another beam to be monitored in the window time length after the monitoring of any beam to be monitored is finished or before the monitoring of any beam to be monitored is finished, wherein the monitoring is finished and the beam to be monitored does not meet the condition suitable for data transmission in the window time length.
In a specific implementation, the listening unit 52 is adapted to listen to a plurality of beams to be listened to at the same time.
In a specific implementation, the listening unit 52 is adapted to start listening to all beams to be listened to simultaneously until a beam suitable for data transmission is found in all beams to be listened to, or it is determined that all beams to be listened to are not suitable for data transmission.
In a specific implementation, the suitability for data transmission is determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods.
In a specific implementation, the number of the additional delay durations is determined according to priorities of different beams to be monitored, and the higher the priority of the beams to be monitored, the smaller the number of the additional delay durations to be measured.
In a specific implementation, the priority of the different beams to be monitored is determined according to the priority of the transmission of the terminal on the LAA.
In a specific implementation, the listening unit 52 may include: the delay time monitoring subunit is suitable for monitoring each beam to be monitored in the delay time; the variable setting subunit is suitable for setting Ni as Ninit, wherein Ni corresponds to each beam direction to be monitored, i belongs to m, m is the number of beams to be monitored, Ninit is a uniformly distributed random number in an interval [0, CW ], and CW is configured according to the priority transmitted by the terminal on the LAA; a confirming subunit, configured to, for each beam direction to be monitored, if any Ni value is 0 and all time slots of the beam to be monitored corresponding to Ni are idle in the delay duration, confirm that the beam to be monitored corresponding to Ni is suitable for data transmission; a variable value changing subunit that, for each beam direction to be monitored, if Ni > 0 and a variation in Ni value is permitted, makes Ni equal to Ni-1; and the repeating subunit is suitable for repeating the judgment of the Ni value when the monitoring result is idle in the time slot with the additional delay duration in the beam monitoring direction.
In a specific implementation, the apparatus for uplink LBT may further include: and the data transmission unit is suitable for carrying out data transmission by utilizing the beam to be monitored which is suitable for carrying out data transmission.
Specific implementation and beneficial effects of the uplink LBT device in the embodiment of the present invention may refer to the uplink LBT method in the embodiment of the present invention, and are not described herein again.
The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions, when executed, perform the steps of the uplink LBT method. The computer readable storage medium may be an optical disc, a mechanical hard disk, a solid state hard disk, etc.
The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps of the uplink LBT method when running the computer instruction. The terminal can be various appropriate terminals such as a smart phone and a tablet computer.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (42)

1. A method for uplink LBT, comprising:
the method comprises the steps that a terminal obtains beam direction information from a base station side, and determines the direction of beams to be monitored of one or more beams to be monitored according to the beam direction information based on an uplink beam which carries out uplink transmission last time or based on a downlink beam which carries out downlink transmission last time, wherein the beams to be monitored are selected from beams in an unauthorized frequency spectrum range;
the terminal monitors the one or more beams to be monitored so as to determine beams suitable for data transmission;
and the base station side acquires the beam direction information through an authorized main cell or an unauthorized LAA.
2. The method of uplink LBT according to claim 1, wherein the beam direction information is obtained through at least one of PDCCH, MAC-CE and RRC in the authorized primary cell.
3. The method of uplink LBT according to claim 1, wherein the beam direction information is obtained through at least one of PDCCH, MAC-CE and RRC carried by unlicensed LAA.
4. The method of uplink LBT according to claim 2 or 3, wherein the obtaining of the beam direction information by using the PDCCH comprises: and acquiring the beam direction information through the TCI state in the DCI.
5. The method of uplink LBT according to claim 1, wherein said determining the beam direction to be monitored of one or more beams to be monitored further comprises: and reporting the monitoring capability to a base station side before receiving the beam direction information of the base station side, wherein the number of the beam directions contained in the beam direction information is determined according to the monitoring capability.
6. The method of uplink LBT according to claim 1, wherein determining the beam direction of one or more beams to be monitored based on the uplink beam that has been last transmitted comprises: and setting the direction of the uplink beam which carries out uplink transmission at the last time as the direction of the beam to be monitored.
7. The method of uplink LBT as claimed in claim 1, wherein said determining the beam direction of one or more beams to be listened to comprises: and determining to send any type of uplink beam of SRS, PUSCH and PUCCH in the uplink beam which is transmitted last time, and taking the direction of the uplink beam as the direction of the beam to be monitored.
8. The uplink LBT method of claim 1, wherein determining the beam direction to be monitored of the one or more beams to be monitored based on the downlink beam of the latest downlink transmission comprises: and determining a downlink beam transmitted at the latest downlink, and taking the direction of an uplink beam corresponding to the downlink beam or the direction of the downlink beam as the direction of the beam to be monitored.
9. The method of uplink LBT as claimed in claim 1, wherein said determining the beam direction of one or more beams to be listened to comprises: and in the downlink wave beam of the latest downlink transmission, determining to receive any type of downlink wave beam of CSI-RS, SSB, PDCCH, PDSCH and DRS, and taking the direction of the uplink wave beam corresponding to the downlink wave beam or the direction of the downlink wave beam as the direction of the wave beam to be monitored.
10. The method of uplink LBT as claimed in claim 1, wherein listening to the one or more beams to be listened comprises: and monitoring a beam to be monitored at the same time.
11. The method of uplink LBT as claimed in claim 10, wherein said monitoring a beam to be monitored at the same time includes:
after determining that one beam to be monitored is not suitable for data transmission, finishing monitoring the beam to be monitored;
and after the monitoring of the beam to be monitored is finished, starting to monitor another beam to be monitored.
12. The method of uplink LBT as claimed in claim 11, wherein determining that one beam to be monitored is not suitable for data transmission comprises: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission.
13. The method of uplink LBT as claimed in claim 1, wherein listening to the one or more beams to be listened comprises:
determining the window duration of a time window;
monitoring any beam to be monitored in the window duration;
after the monitoring of any beam to be monitored is finished, or before the monitoring of any beam to be monitored is finished, starting monitoring another beam to be monitored in the window time length, wherein the monitoring is finished, and the condition that the beam to be monitored does not meet the condition suitable for data transmission in the window time length is included.
14. The method of uplink LBT as claimed in claim 1, wherein listening to the one or more beams to be listened comprises: and monitoring a plurality of beams to be monitored at the same time.
15. The method of uplink LBT as claimed in claim 14, wherein listening to multiple beams to be listened to at the same time comprises: and simultaneously starting to monitor all the beams to be monitored until the beams suitable for data transmission are found in all the beams to be monitored, or confirming that all the beams to be monitored are not suitable for data transmission.
16. The method of uplink LBT as claimed in claim 15, wherein said suitability for data transmission is determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods.
17. The method according to claim 16, wherein the number of the additional delay durations is determined according to priorities of different beams to be monitored, and the higher the priority of the beams to be monitored, the smaller the number of the additional delay durations to be measured.
18. The method of uplink LBT according to claim 17, wherein the priority of different beams to be monitored is determined according to the priority of terminal transmission on LAA.
19. The method of uplink LBT as claimed in claim 14, wherein said monitoring multiple beams to be monitored at the same time includes:
monitoring each beam to be monitored in the delay time;
setting Ni＝NinitIn which N isiCorresponding to each beam direction to be monitored, i belongs to m, m is the number of beams to be monitored, NinitIs the interval [0, CW]The CW is configured according to the priority transmitted by the terminal on the LAA;
for each beam direction to be monitored, if any N isiA value of 0, andthe N isiIf all time slots corresponding to the beams to be monitored are idle in the delay time length, the N is confirmediThe corresponding beam to be monitored is suitable for data transmission;
for each beam direction to be monitored, if N isi> 0, and grant NiWhen the value is changed, N is obtainedi＝Ni-1；
Repeating the pair N when the monitoring result is idle in the time slot of the additional delay duration in the beam monitoring directioniAnd (5) judging the value.
20. The method for uplink LBT according to claim 1, further comprising: and carrying out data transmission by utilizing the beam to be monitored suitable for carrying out data transmission.
21. An uplink LBT apparatus in a terminal, comprising:
the beam direction determining unit is suitable for acquiring beam direction information from a base station side, and determining the direction of beams to be monitored of one or more beams to be monitored according to the beam direction information and based on the uplink beams which are subjected to uplink transmission last time or the downlink beams which are subjected to downlink transmission last time, wherein the beams to be monitored are selected from beams in an unlicensed spectrum range;
the monitoring unit is suitable for monitoring the one or more beams to be monitored so as to determine the beams suitable for data transmission;
and the base station side acquires the beam direction information through an authorized main cell or an unauthorized LAA.
22. The apparatus of uplink LBT as claimed in claim 21, wherein the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of PDCCH, MAC-CE and RRC in the authorized primary cell.
23. The apparatus of uplink LBT as claimed in claim 21, wherein the beam direction information obtaining subunit is adapted to obtain the beam direction information through at least one of PDCCH, MAC-CE and RRC carried by unlicensed LAA.
24. The apparatus of uplink LBT according to claim 22 or 23, wherein the beam direction information obtaining subunit obtains the beam direction information through PDCCH, including: and acquiring the beam direction information through the TCI state in the DCI.
25. The apparatus of uplink LBT as claimed in claim 21, wherein said beam direction determining unit further comprises: and the monitoring capability reporting unit is suitable for reporting the monitoring capability to the base station side before receiving the beam direction information of the base station side, wherein the number of the beam directions contained in the beam direction information is determined according to the monitoring capability.
26. The apparatus of uplink LBT according to claim 21, wherein said beam direction determining unit is adapted to determine the direction of the uplink beam that has last been uplink transmitted as the beam direction to be monitored.
27. The apparatus according to claim 21, wherein the beam direction determining unit is adapted to determine, in an uplink beam for which uplink transmission has been performed last time, an uplink beam of any one of transmission SRS, PUSCH, and PUCCH, and take the direction of the uplink beam as the beam direction to be monitored.
28. The apparatus according to claim 21, wherein the beam direction determining unit is adapted to determine a downlink beam of a latest downlink transmission, and take a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
29. The apparatus according to claim 21, wherein the beam direction determining unit is adapted to determine, in a downlink beam of a latest downlink transmission, that any type of downlink beam among CSI-RS, SSB, PDCCH, PDSCH and DRS is received, and use a direction of an uplink beam corresponding to the downlink beam or a direction of the downlink beam as the beam direction to be monitored.
30. The apparatus of uplink LBT as claimed in claim 21, wherein said listening unit is adapted to listen to a beam to be listened to at the same time.
31. The apparatus of claim 30, wherein the monitoring unit is adapted to end monitoring on one beam to be monitored after determining that the beam to be monitored is not suitable for data transmission, and start monitoring on another beam to be monitored after ending monitoring on the beam to be monitored.
32. The apparatus of claim 31, wherein determining that one beam to be monitored is not suitable for data transmission comprises: and in a preset time length, the beam to be monitored does not meet the condition suitable for data transmission.
33. The apparatus of uplink LBT as claimed in claim 21, wherein said listening unit comprises:
a window duration determining subunit adapted to determine a window duration of the time window;
the window monitoring subunit is suitable for monitoring any beam to be monitored in the window duration;
and the window monitoring new subunit is suitable for starting monitoring of another beam to be monitored in the window time length after the monitoring of any beam to be monitored is finished or before the monitoring of any beam to be monitored is finished, wherein the monitoring is finished and the beam to be monitored does not meet the condition suitable for data transmission in the window time length.
34. The apparatus of uplink LBT as claimed in claim 21, wherein said listening unit is adapted to listen to multiple beams to be listened to at the same time.
35. The apparatus of uplink LBT as claimed in claim 34, wherein said listening unit is adapted to start listening to all beams to be listened to simultaneously until finding a beam suitable for data transmission in all beams to be listened to or confirming that all beams to be listened to are not suitable for data transmission.
36. The apparatus of uplink LBT as claimed in claim 35, wherein said adaptation for data transmission is determined by: all timeslots are measured to be free for one delay period and all timeslots are measured to be free for an integer number of additional delay periods.
37. The apparatus of claim 36, wherein the number of the additional delay durations is determined according to priorities of different beams to be monitored, and the higher the priority of the beams to be monitored, the smaller the number of the additional delay durations to be measured.
38. The apparatus of claim 37, wherein the priority of different beams to be monitored is determined according to the priority of transmission on LAA of the terminal.
39. The apparatus of uplink LBT as claimed in claim 34, wherein said listening unit comprises:
the delay time monitoring subunit is suitable for monitoring each beam to be monitored in the delay time;
a variable setting subunit adapted to set Ni＝NinitIn which N isiCorresponding to each beam direction to be monitored, i belongs to m, m is the number of beams to be monitored, NinitIs the interval [0, CW]According to the terminal, CW is inConfiguring the priority of transmission on the LAA;
a confirmation subunit, for each beam direction to be monitored, if any NiA value of 0, and the NiIf all time slots corresponding to the beams to be monitored are idle in the delay time length, the N is confirmediThe corresponding beam to be monitored is suitable for data transmission;
the variable value changes the sub-unit, for each beam direction to be monitored, if Ni> 0, and grant NiWhen the value is changed, N is obtainedi＝Ni-1；
A repeating subunit adapted to repeat the pair N when the monitoring result is idle in the time slot of the additional delay duration in the monitoring beam directioniAnd (5) judging the value.
40. The apparatus of uplink LBT as claimed in claim 21, further comprising: and the data transmission unit is suitable for carrying out data transmission by utilizing the beam to be monitored which is suitable for carrying out data transmission.
41. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions are executable to perform the steps of the method for uplink LBT according to any one of claims 1 to 20.
42. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method for uplink LBT according to any one of claims 1 to 20.
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