CN114727421A - Uplink signal transmission method and device, storage medium, terminal and base station - Google Patents

Uplink signal transmission method and device, storage medium, terminal and base station Download PDF

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Publication number
CN114727421A
CN114727421A CN202110008147.5A CN202110008147A CN114727421A CN 114727421 A CN114727421 A CN 114727421A CN 202110008147 A CN202110008147 A CN 202110008147A CN 114727421 A CN114727421 A CN 114727421A
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signal
uplink
quasi
channel
downlink
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沈兴亚
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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
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

An uplink signal transmission method and device, a storage medium, a terminal and a base station based on an unlicensed spectrum are provided, wherein the method comprises the following steps: receiving a downlink signal, and determining the channel occupying time according to the downlink signal; determining whether the sending time of the uplink signal to be sent falls within the channel occupying time; if the signal length falls into the channel occupying time, judging whether the uplink signal to be sent and the downlink signal are quasi-common-station addresses or not; and if the channel is judged to be the quasi-co-site, adopting a second type LBT to sense the channel. The invention can improve the probability of accessing the channel by setting the UE to adopt the second type LBT to intercept the channel.

Description

Uplink signal transmission method and device, storage medium, terminal and base station
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an uplink signal transmission method and apparatus, a storage medium, a terminal, and a base station based on an unlicensed spectrum.
Background
Sending data over unlicensed spectrum requires listening to the channel first, and only the channel is free to send data over it, so-called Listen Before Talk (LBT). In unlicensed spectrum systems, different base stations/terminals compete for shared spectrum resources. Lbt (list before talk) is a technique used to avoid channel access collisions. For example, a Channel may be considered occupied when energy in a 20MHz bandwidth is detected to be above a threshold in a Clear Channel Assessment (CCA) in units of 20MHz bandwidth.
There are two LBT modes on the 60GHz band, one is omni-directional LBT and the other is directional LBT. Omni-directional LBT is listening to the channel using energy detection and does not take antenna gain into account. Directional LBT is the use of energy detection inside a narrower beam to listen to the channel. 802.11ad/ay employs omni-directional LBT, which is also proposed by some companies during the R16NR-U SI stage. Directional LBT can increase the channel access probability and improve spatial reuse compared to omni-directional LBT.
Further, a Channel occupied by the base station on the unlicensed spectrum may be shared with the user, after the base station occupies the Channel and transmits data, the base station may indicate a Channel occupation time, and after the UE obtains the time that the base station occupies the Channel, the UE may configure uplink (Configured Grant) transmission to fall within a Channel Occupation Time (COT) of the base station while listening to the Channel, so as to improve a probability of successful transmission. If directional LBT is used and beamforming (beam forming) transmission is used, its COT sharing needs to be beam based. Otherwise, if the channel can be shared between beams not belonging to the same direction, the probability of channel contention will increase.
However, in the prior art, the UE uses the first type LBT listening channel, resulting in a decrease in the uplink channel access probability.
There is a need for an uplink signal transmission method, which enables a UE to select a suitable type LBT mode to listen to a channel at an appropriate time, thereby improving the uplink channel access probability.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an uplink signal transmission method and device, a storage medium, a terminal and a base station based on an unlicensed spectrum, and the probability of accessing a channel can be improved by setting UE to adopt a second type LBT to monitor the channel.
In order to solve the above technical problem, an embodiment of the present invention provides an uplink signal transmission method based on an unlicensed spectrum, including: receiving a downlink signal, and determining the channel occupying time according to the downlink signal; determining whether the sending time of the uplink signal to be sent falls within the channel occupying time length; if the signal length falls into the channel occupying time, judging whether the uplink signal to be sent and the downlink signal are quasi-common-station addresses or not; and if the channel is judged to be the quasi-co-site, adopting a second type LBT to sense the channel.
Optionally, the downlink signal includes duration indication information, where the duration indication information is used to indicate the duration occupied by the channel; determining the channel occupancy duration according to the downlink signal comprises: and determining the channel occupying time according to the time indication information.
Optionally, the determining whether the uplink signal to be sent and the downlink signal are quasi-co-sited addresses includes: determining a signal of a wave beam in the same direction as the uplink signal to be transmitted, and recording the signal as a second reference signal; determining a signal of a wave beam which adopts the same direction as the downlink signal and recording the signal as a first reference signal; searching a predefined table, and determining whether the second reference signal and the first reference signal are quasi co-sited; if at least one second reference signal and at least one first reference signal are in a quasi-common-station-address relationship, determining that the uplink signal to be transmitted and the downlink signal are in a quasi-common-station-address relationship; the predefined table includes a quasi co-site relationship between each second reference signal and each first reference signal.
Optionally, if the uplink signal to be transmitted and the downlink signal are not quasi-co-site, determining the uplink signal to be transmitted having a quasi-co-site relationship with the downlink signal, and recording as a quasi-co-site uplink signal; and determining the wave beam of the uplink data to be transmitted based on the quasi-common-site downlink signal.
Optionally, determining the uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal, includes: determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal; searching a predefined table, and determining a second reference signal which is in a quasi-co-site relation with the first reference signal; determining a signal of a wave beam in the same direction as the second reference signal according to the second reference signal, and using the signal as an uplink signal having a quasi-co-site relationship with the downlink signal; the predefined table includes a quasi co-site relationship between each of the second reference signals and each of the first reference signals.
Optionally, determining, based on the quasi-common-site downlink signal, a beam of uplink data to be transmitted includes: determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal; determining a spatial reception parameter of the first reference signal, wherein the spatial reception parameter is used for indicating a beam direction for transmitting the first reference signal; and determining the wave beam of the uplink data to be transmitted according to the space receiving parameters.
Optionally, determining, according to the spatial receiving parameter, a beam of uplink data to be transmitted includes: and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, selecting the beam with the strongest gain for uplink data transmission.
Optionally, determining, according to the spatial receiving parameter, a beam of uplink data to be transmitted includes: and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, arbitrarily selecting one of the beams for uplink data transmission.
Optionally, the first reference signal is selected from: the reference signal, DM-RS, SSB and CSI-RS used for indicating the downlink control channel TCI.
Optionally, the second reference signal is selected from: and the reference signal, the SSB and the CSI-RS are used for indicating the configuration of the uplink transmission SRS resource.
Optionally, the uplink signal transmission method further includes: and if the uplink signal to be sent and the downlink signal are not quasi-co-sited, adopting a first type LBT listening channel.
Optionally, the downlink signal is selected from: SSB, downlink control channel, downlink data channel, downlink reference signal.
Optionally, the uplink signal is selected from: an uplink data channel, an uplink control channel, and an SRS.
In order to solve the above technical problem, an embodiment of the present invention provides an uplink signal transmission method based on an unlicensed spectrum, including: configuring and sending a downlink signal so that a user terminal determines a channel occupying time length according to the downlink signal, then determining whether the sending time of an uplink signal to be sent falls within the channel occupying time length, judging whether the uplink signal to be sent and the downlink signal are quasi co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying time length, and adopting a second type LBT to monitor a channel when the uplink signal to be sent and the downlink signal are quasi co-site.
Optionally, the downlink signal includes duration indication information, where the duration indication information is used to indicate the duration occupied by the channel.
To solve the above technical problem, an embodiment of the present invention provides an uplink signal transmission apparatus, including: the receiving module is used for receiving a downlink signal and determining the channel occupying time according to the downlink signal; a determining module, configured to determine whether a sending time of an uplink signal to be sent falls within the channel occupation duration; a quasi-common-site determining module, configured to determine whether the uplink signal and the downlink signal to be sent are quasi-common-site signals when the signals fall within the channel occupying duration; and the monitoring module is used for adopting a second type LBT to monitor the channel when the station is the quasi-common station.
In order to solve the above technical problem, an embodiment of the present invention provides an uplink signal transmission apparatus based on an unlicensed spectrum, including: and the configuration sending module is used for configuring and sending the downlink signal so that the user terminal determines the channel occupying duration according to the downlink signal, then determines whether the sending time of the uplink signal to be sent falls within the channel occupying duration, judges whether the uplink signal to be sent and the downlink signal are quasi-co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying duration, and adopts a second type LBT to monitor the channel when the uplink signal to be sent and the downlink signal are quasi-co-site.
To solve the above technical problem, an embodiment of the present invention provides a storage medium having a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above uplink signal transmission method based on unlicensed spectrum or perform the steps of the above uplink signal transmission method based on unlicensed spectrum.
In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the above uplink signal transmission method based on an unlicensed spectrum when running the computer program.
In order to solve the above technical problem, an embodiment of the present invention provides a base station, including a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the above uplink signal transmission method based on unlicensed spectrum when running the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, whether the uplink signal to be sent and the downlink signal are quasi co-sited or not is judged by setting, and under the condition of the quasi co-sited, the UE adopts the second type LBT interception channel, because the uplink beam can be switched to the channel access process of the type 2A/2B when the uplink signal to be sent and the downlink signal are quasi co-sited, the beams in other directions cannot be mistakenly considered as the occupied channel, so that the access probability is improved.
Further, in the case of an unlicensed spectrum, by setting a predefined table, the UE may determine that the uplink signal to be transmitted and the downlink signal are quasi co-sited according to a quasi co-sited relationship that at least one second reference signal and at least one first reference signal are quasi co-sited, compared with the case of an licensed spectrum, the UE may receive all downlink signals from the base station, that is, may directly determine a quasi co-sited relationship between the uplink signal and the downlink signal according to spatial receiving parameters of the signals, under the condition of the unauthorized frequency spectrum, the problem of incomplete received downlink signals possibly exists, so that the quasi-co-site relation between the uplink signals and the downlink signals can not be determined directly according to the space receiving parameters of the signals, how to enable the UE to determine whether the uplink signal and the downlink signal to be sent are quasi-co-sited.
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Fig. 1 is a flowchart of an uplink signal transmission method based on unlicensed spectrum according to an embodiment of the present invention;
fig. 2 is a partial flowchart of another unlicensed spectrum based uplink signal transmission method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an uplink signal transmission apparatus based on an unlicensed spectrum according to an embodiment of the present invention.
Detailed Description
As described above, the UE sends data on the unlicensed spectrum, and needs to listen to the Channel first, after the base station occupies the Channel and sends the data, the base station may indicate the Channel occupying time, and after obtaining the time that the base station occupies the Channel, the UE may configure uplink (Configured Grant) transmission to fall within the Channel Occupying Time (COT) of the base station while listening to the Channel, so as to improve the probability of successful sending.
The inventor of the present invention finds, through research, that in the prior art, UE lacks accurate judgment on a beam direction, which results in that only a first type LBT (also called omni-directional LBT) can be used to listen to a channel, beams in other directions are easily mistaken for the channel being occupied, and currently cannot be accessed, which results in a decrease in access probability and an influence on communication effect.
In the embodiment of the present invention, whether the uplink signal to be transmitted and the downlink signal are quasi co-sited is determined by setting, and in the case of the quasi co-sited, the UE uses the second type LBT listening channel, because when the uplink signal to be transmitted and the downlink signal are quasi co-sited, the uplink beam can be switched to the channel access process of the second type LBT (for example, type 2A/2B/2C LBT), the beam in other directions cannot be mistaken as the channel is occupied, thereby increasing the probability of access.
For detailed definition of the first type LBT and the second type LBT, refer to protocol 37.213. Optionally, the first type of LBT requires the base station or the terminal to detect the channel for multiple times, where each detection duration is a time window, and the length of the time window may be x microseconds, and x is a natural number. And in each time window, judging whether the channel is idle or not according to the comparison between the detected channel energy and the threshold, wherein if the detected channel energy is equal to or higher than the threshold, the channel is busy, otherwise, the channel is idle. The second type of LBT requires the base station or the terminal to detect the channel once or twice, each detection duration is a time window, the length of the window may be x microseconds, and x is a natural number. And in each time window, judging whether the channel is idle or not according to the comparison between the detected channel energy and the threshold, wherein if the detected channel energy is equal to or higher than the threshold, the channel is busy, otherwise, the channel is idle.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart of an uplink signal transmission method based on an unlicensed spectrum according to an embodiment of the present invention. The unlicensed spectrum based uplink signal transmission method may be used for a UE side, and may further include steps S11 to S14:
step S11: receiving a downlink signal, and determining the channel occupying time according to the downlink signal;
step S12: determining whether the sending time of the uplink signal to be sent falls within the channel occupying time length;
step S13: if the signal length falls within the channel occupying time, judging whether the uplink signal to be sent and the downlink signal are quasi-common-station addresses or not;
step S14: and if the channel is judged to be the quasi-co-site, adopting a second type LBT to sense the channel.
In a specific implementation of step S11, the UE may receive a downlink signal transmitted from the base station, where the downlink signal may be a reference signal associated with a beam of a downlink control channel.
Specifically, in the method for indicating a receive beam of a physical downlink reference signal or channel, a Transmission Configuration Indication (TCI) state or a TCI state set may be activated by a Medium Access Control (MAC) Control Element (CE) signaling. The Physical Downlink Reference Channel is, for example, a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH), and the Physical Downlink Reference signal is, for example, a Channel State Information Reference signal (CSI-RS).
Further, the downlink signal may be selected from: a Synchronization Signal Block (SSB), a downlink control channel, a downlink data channel, and a downlink reference Signal.
The uplink signal may be selected from: an uplink data channel, an uplink control channel, and an SRS.
Further, the downlink signal includes duration indication information, and the duration indication information is used for indicating the channel occupation duration; determining the channel occupancy duration according to the downlink signal comprises: and determining the channel occupying time length according to the time length indication information.
In the embodiment of the invention, by setting the time length indication information contained in the downlink signal, the channel occupying time length can be obtained after the downlink signal is obtained, and compared with the method that the UE needs to calculate and determine the channel occupying time length, the method and the device can improve the accuracy.
In a specific implementation of step S12, the UE may determine a transmission time of the uplink signal to be transmitted, and further determine whether the uplink signal to be transmitted is transmitted within the channel occupying duration according to the channel occupying duration.
Specifically, after the base station succeeds in omni-directional LBT or directional LBT and occupies a channel and transmits data, the base station may indicate the channel occupying time, and if an uplink signal to be transmitted by the UE may fall within the channel occupying time, the UE transmits the uplink signal by using the channel that the base station has successfully occupied, so that the transmission success rate may be improved.
In the specific implementation of step S13, if the sending time of the uplink signal to be sent falls within the channel occupying duration, the UE may determine whether the uplink signal to be sent and the downlink signal are quasi-co-sited.
Specifically, when the uplink signal to be transmitted and the downlink signal are quasi co-sited, the UE may switch to the channel access process of type 2A/2B when transmitting signals by using uplink beams, so that beams in other directions are not mistaken for occupied channels, thereby improving the probability of access.
In the embodiment of the present invention, it may be determined whether the uplink signal and the downlink signal to be transmitted are quasi-co-sited sites in an appropriate manner according to specific situations.
In a specific implementation manner of the embodiment of the present invention, the UE may send the uplink signal by using the same spatial filtering parameter as the downlink signal, and determine that the downlink signal and the uplink signal are quasi co-sited. Specifically, for example, the UE may determine that the downlink signal and the uplink signal are quasi co-sited, by transmitting the uplink signal using the same Spatial filter (Spatial filter) as the downlink signal. In another specific implementation manner of the embodiment of the present invention, it may be determined whether the uplink signal and the downlink signal are quasi-co-sited through setting a proper table in advance.
Referring to table 1, table 1 is a table of quasi co-site relationships between uplink signals and downlink signals.
TABLE 1
Figure BDA0002883871950000081
Figure BDA0002883871950000091
As shown in table 1, the presence of √ indicates that the downlink signal and the uplink signal are quasi-co-sited, and the absence of √ indicates that the downlink signal and the uplink signal are not quasi-co-sited, wherein the downlink signals 1-4 can have different identification information, and the uplink signals 1-4 can have different identification information.
The identification information of the downlink signal is used for uniquely determining the downlink signal transmitted on the specific time-frequency domain, and the identification information of the uplink signal is used for uniquely determining the uplink signal transmitted on the specific time-frequency domain.
Further, the identification information of the downlink signal and the identification information of the uplink signal to be sent may be determined respectively; searching a predefined table, and determining whether the identification information of the uplink signal to be sent and the identification information of the downlink signal are in a quasi-common-site relationship; if the identification information of the uplink signal to be sent and the identification information of the downlink signal are in a quasi-common-station-address relationship, determining that the uplink signal to be sent and the downlink signal are in a quasi-common-station-address relationship; and the predefined table contains the quasi co-site relation of one-to-one correspondence between the identification information of each uplink signal and the identification information of each uplink signal.
The predefined table may be predefined by a communication protocol, or may be sent to the UE by the base station in advance, for example, by higher layer signaling.
Further, determining whether the uplink signal to be transmitted and the downlink signal are quasi-co-sited addresses includes: determining a signal of a wave beam in the same direction as the uplink signal to be sent, and recording the signal as a second reference signal; determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal; searching a predefined table, and determining whether the second reference signal and the first reference signal are quasi co-sited; if at least one second reference signal and at least one first reference signal are in a quasi-common-station-address relationship, determining that the uplink signal to be transmitted and the downlink signal are in a quasi-common-station-address relationship; the predefined table includes a quasi co-site relationship between each second reference signal and each first reference signal.
Further, the first reference signal is selected from: a Reference Signal for indicating a downlink control Channel TCI, a demodulation Reference Signal (DM-RS), a Synchronization Signal Block (SSB), and a Channel-state information Reference Signal (CSI-RS).
The second reference signal is selected from: the Reference Signal, the Synchronization Signal Block (SSB), and the Channel-state information Reference Signal (CSI-RS) are used to indicate configuration of a Sounding Reference Signal (SRS) resource of an uplink transmission Channel.
In this embodiment, it can be determined whether two signals use beams in the same direction in the conventional manner, and the present invention is not limited thereto.
Furthermore, the identification information of the downlink signal may be a downlink time-frequency interval in a single downlink time-frequency resource period, and the identification information of the uplink signal may be an uplink time-frequency interval in a single uplink time-frequency resource period. The downlink time-frequency interval may include a part of time-frequency resources in a single downlink time-frequency resource period, and the uplink time-frequency interval may include a part of time-frequency resources in a single uplink time-frequency resource period.
Specifically, the step of determining whether the uplink signal to be sent and the downlink signal are quasi-co-sited addresses may include: determining an uplink time-frequency resource occupied by the uplink signal to be transmitted, and determining an uplink time-frequency interval to which the uplink time-frequency resource belongs in a single uplink time-frequency resource period, wherein the uplink time-frequency resource period is divided into a plurality of uplink time-frequency intervals which are not repeated on time-frequency domain resources; determining downlink time-frequency resources occupied by the downlink signals, and determining downlink time-frequency intervals to which the downlink time-frequency resources belong in a single downlink time-frequency resource period, wherein the downlink time-frequency resource period is divided into a plurality of downlink time-frequency intervals which are not repeated on time-frequency domain resources; searching a predefined table, and determining whether the uplink time-frequency interval and the downlink time-frequency interval are quasi-common-site addresses; if the uplink time-frequency interval and the downlink time-frequency interval are in a quasi-common-site relationship, determining that the uplink signal to be sent and the downlink signal are in a quasi-common-site relationship; and the predefined table comprises the quasi-common-site relation which corresponds to each uplink time-frequency interval and each downlink time-frequency interval one by one.
In the embodiment of the present invention, in the case of an unlicensed spectrum, by setting a predefined table, the UE may be enabled to use at least one second reference signal and at least one first reference signal as a quasi co-site relationship, and determine that the uplink signal to be transmitted and the downlink signal are quasi co-site, so as to solve a problem how to enable the UE to determine whether the uplink signal to be transmitted and the downlink signal are quasi co-site in the case of the unlicensed spectrum.
It should be noted that, under the condition of the authorized spectrum, the UE may receive all downlink signals from the base station, that is, may determine the quasi co-site relationship between the uplink and downlink signals directly according to the spatial receiving parameters of the signals, and under the unlicensed spectrum, there may be a problem that the received downlink signals are not complete, so that the quasi co-site relationship between the uplink and downlink signals cannot be determined directly according to the spatial receiving parameters of the signals, and therefore the method is very important and necessary.
The spatial receiving parameter may be, for example, a large-scale channel parameter.
In a specific implementation of step S14, if the uplink signal to be transmitted and the downlink signal are quasi-co-sited, a second type LBT listening channel may be used.
Further, the second type LBT is to perform CCA listening multiple times.
The second type LBT may be type 2A/2B/2C LBT, and the specific definition may refer to section 37.2134.2.1 of communication protocol.
Optionally, the second type LBT requires the base station or the terminal to detect the channel once or twice, where each detection duration is a time window, and the length of the time window may be x microseconds, and x is a natural number. And in each time window, judging whether the channel is idle or not according to the comparison between the detected channel energy and the threshold, wherein if the detected channel energy is equal to or higher than the threshold, the channel is busy, otherwise, the channel is idle.
In the embodiment of the present invention, whether the uplink signal to be sent and the downlink signal are quasi co-sited is determined by setting, and in the case of the quasi co-sited, the UE uses the second type LBT listening channel, because when the uplink signal to be sent and the downlink signal are quasi co-sited, the uplink beam can be switched to the second type (for example, type 2A/2B/2C) channel access process, the beam in other directions cannot be mistakenly regarded as the channel occupied, thereby increasing the probability of access.
Further, the uplink signal transmission method further includes: if the uplink signal to be transmitted and the downlink signal are not quasi-co-sited, a first type LBT listening channel may be used.
Further, the first type of LBT may be to perform one or two CCA listening.
The first type LBT may be type 1LBT, and the specific definition may refer to section 37.2134.2.1 of communication protocol.
Optionally, the first type of LBT requires the base station or the terminal to detect the channel for multiple times, where each detection duration is a time window, and the length of the time window may be x microseconds, and x is a natural number. And in each time window, judging whether the channel is idle or not according to the comparison between the detected channel energy and the threshold, wherein if the detected channel energy is equal to or higher than the threshold, the channel is busy, otherwise, the channel is idle.
Referring to fig. 2, fig. 2 is a partial flowchart of another unlicensed spectrum-based uplink signal transmission method according to an embodiment of the present invention. The other uplink signal transmission method based on the unlicensed spectrum may be used for a UE, and may include steps S11 to S14 shown in fig. 1, and may further include steps S21 to S22:
step S21: if the uplink signal to be sent and the downlink signal are not quasi co-site, determining the uplink signal to be sent which has a quasi co-site relation with the downlink signal and recording as a quasi co-site uplink signal;
step S22: and determining the wave beam of the uplink data to be transmitted based on the quasi-common-site downlink signal.
In a specific implementation of step S21, when the uplink signal to be transmitted and the downlink signal are not quasi co-sited, in order to improve the transmission quality of the uplink signal, an uplink signal having a quasi co-sited relationship (i.e., a quasi co-sited uplink signal) may be found, and uplink transmission is configured based on the uplink signal.
In the specific implementation of the embodiment of the present invention, an uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal, may be determined in an appropriate manner.
In an embodiment, the predefined table shown in table 1 above may be used to determine an uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal.
Specifically, the step of determining the uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal, may include: and determining the identification information of the downlink signal, searching a predefined table, determining the identification information of the uplink signal which is in quasi-common-station address relationship with the identification information of the downlink signal, and determining the uplink signal according to the identification information of the downlink signal.
Further, determining an uplink signal to be transmitted having a quasi-co-site relationship with the downlink signal includes: determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal; searching a predefined table, and determining a second reference signal which is in a quasi-co-site relation with the first reference signal; determining a signal of a wave beam in the same direction as the second reference signal according to the second reference signal, and using the signal as an uplink signal having a quasi-co-site relationship with the downlink signal; the predefined table includes a quasi co-site relationship between each of the second reference signals and each of the first reference signals.
Furthermore, the identification information of the downlink signal may be a downlink time-frequency interval in a single downlink time-frequency resource period, and the identification information of the uplink signal may be an uplink time-frequency interval in a single uplink time-frequency resource period. The downlink time-frequency interval may include a part of time-frequency resources in a single downlink time-frequency resource period, and the uplink time-frequency interval may include a part of time-frequency resources in a single uplink time-frequency resource period.
Specifically, the step of determining the uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal, may include: determining an uplink time-frequency resource occupied by the uplink signal to be transmitted, and determining an uplink time-frequency interval to which the uplink time-frequency resource belongs in a single uplink time-frequency resource period, wherein the uplink time-frequency resource period is divided into a plurality of uplink time-frequency intervals which are not repeated on time-frequency domain resources; searching a predefined table, determining a downlink time-frequency interval which is in a quasi-common-station-address relation with the uplink time-frequency interval, and recording as a quasi-common-station-address interval; determining an uplink signal to be transmitted, which has a quasi-common-site relation with the downlink signal, according to the downlink signal of a time-frequency resource in the quasi-common-site interval in a single downlink time-frequency resource period; the downlink time-frequency resource period is divided into a plurality of downlink time-frequency intervals which are not repeated on the time-frequency domain resources; the predefined table contains the quasi-common-site relation between each uplink time-frequency interval and each downlink time-frequency interval in one-to-one correspondence.
In the step of determining the uplink signal to be transmitted, which has a quasi-co-site relationship with the downlink signal, according to the downlink signal of the time-frequency resource, which is located in the quasi-co-site interval in a single downlink time-frequency resource period, the downlink signal of the time-frequency resource, which is located in the quasi-co-site interval in the single downlink time-frequency resource period, can be directly used as the downlink signal having the quasi-co-site relationship.
In the embodiment of the present invention, in the case of an unlicensed spectrum, by setting a predefined table, the UE may determine, according to a quasi co-site relationship between the uplink time-frequency interval and the downlink time-frequency interval, an uplink signal of a quasi co-site according to a downlink signal to be transmitted, and compared with the unlicensed spectrum in the prior art, there may be a problem that a received downlink signal is incomplete, so that an uplink signal that is in a quasi co-site relationship with the downlink signal cannot be directly determined according to a spatial receiving parameter of the signal.
In a specific implementation of step S22, determining, based on the quasi-common-site downlink signal, a beam of uplink data to be transmitted includes: determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal; determining a spatial reception parameter of the first reference signal, wherein the spatial reception parameter is used for indicating a beam direction for transmitting the first reference signal; and determining the wave beam of the uplink data to be transmitted according to the space receiving parameters.
In the embodiment of the present invention, the beam direction is determined by using the Spatial RX parameter of the first reference signal, which can improve the accuracy of the UE in determining the beam direction, thereby improving the uplink transmission quality.
In a specific implementation manner of the embodiment of the present invention, determining, according to the spatial reception parameter, a beam of uplink data to be transmitted includes: and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, selecting the beam with the strongest gain for uplink data transmission.
In the embodiment of the invention, the beam with the strongest gain is set and selected for uplink data transmission, which is beneficial to improving the quality of uplink transmission.
In another specific implementation manner of the embodiment of the present invention, determining, according to the spatial reception parameter, a beam of uplink data to be transmitted includes: and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, arbitrarily selecting one of the beams for uplink data transmission.
In the embodiment of the invention, one of the beams is set and selected for uplink data transmission, so that the selectivity of uplink transmission is improved, and the design complexity is reduced.
In the embodiment of the present invention, a further uplink signal transmission method based on an unlicensed spectrum is also disclosed, which may be used at a base station side, and the further uplink signal transmission method based on the unlicensed spectrum may include: configuring and sending a downlink signal so that a user terminal determines a channel occupying time length according to the downlink signal, then determining whether the sending time of an uplink signal to be sent falls within the channel occupying time length, judging whether the uplink signal to be sent and the downlink signal are quasi co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying time length, and adopting a second type LBT to monitor a channel when the uplink signal to be sent and the downlink signal are quasi co-site.
Further, the downlink signal includes duration indication information, and the duration indication information is used to indicate the channel occupancy duration.
In the embodiment of the present invention, whether the uplink signal to be transmitted and the downlink signal are quasi co-sited is determined by setting, and in the case of the quasi co-sited, the UE uses the second type LBT listening channel, because when the uplink signal to be transmitted and the downlink signal are quasi co-sited, the uplink beam can be switched to the second type (for example, type 2A/2B) channel access process, the beam in other directions cannot be mistaken for the channel occupation, thereby increasing the probability of access.
In a specific implementation, please refer to the description in fig. 1 and fig. 2 for further details regarding another uplink signal transmission method based on an unlicensed spectrum, which will not be described herein again.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an uplink signal transmission apparatus based on an unlicensed spectrum according to an embodiment of the present invention. The unlicensed spectrum-based uplink signal transmission apparatus may be used in a UE side, and may include:
a receiving module 31, configured to receive a downlink signal, and determine a channel occupation duration according to the downlink signal;
a determining module 32, configured to determine whether a sending time of an uplink signal to be sent falls within the channel occupation duration;
a quasi-common-site determining module 33, configured to determine whether the uplink signal and the downlink signal to be sent are quasi-common-site signals when the signals fall within the channel occupying duration;
and the sensing module 34 is configured to sense a channel using the second type LBT when the quasi co-site is the quasi co-site.
In the embodiment of the present invention, another uplink signal transmission apparatus based on an unlicensed spectrum is also disclosed, and the another uplink signal transmission apparatus based on an unlicensed spectrum may be used at a base station side, and may further include: and the configuration sending module is used for configuring and sending the downlink signal so that the user terminal determines the channel occupying duration according to the downlink signal, then determines whether the sending time of the uplink signal to be sent falls within the channel occupying duration, judges whether the uplink signal to be sent and the downlink signal are quasi-co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying duration, and adopts a second type LBT to monitor the channel when the uplink signal to be sent and the downlink signal are quasi-co-site.
For the principle, specific implementation and beneficial effects of the uplink signal transmission apparatus based on unlicensed spectrum, please refer to the related description of the uplink signal transmission method based on unlicensed spectrum described above, and details are not repeated here.
Embodiments of the present invention further provide a storage medium, on which a computer program is stored, where the computer program is executed by a processor, and the computer program executes the steps of the above method. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
The embodiment of the invention also provides a terminal, which comprises a memory and a processor, wherein the memory is stored with a computer program capable of running on the processor, and the processor executes the steps of the method when running the computer program. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method when running the computer program.
A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.
The base station controller in the embodiment of the present application is a device for managing a base station, for example, a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, or a device for controlling and managing a base station in a future new communication system.
The network on the network side in the embodiment of the present invention refers to a communication network providing communication services for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.
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 (19)

1. An uplink signal transmission method based on an unlicensed spectrum, comprising:
receiving a downlink signal, and determining the channel occupying time according to the downlink signal;
determining whether the sending time of the uplink signal to be sent falls within the channel occupying time;
if the signal length falls into the channel occupying time, judging whether the uplink signal to be sent and the downlink signal are quasi-common-station addresses or not;
and if the channel is judged to be the quasi-co-site, adopting a second type LBT to sense the channel.
2. The uplink signal transmission method according to claim 1, wherein the downlink signal includes duration indication information, and the duration indication information is used to indicate the channel occupancy duration;
determining the channel occupancy duration according to the downlink signal comprises:
and determining the channel occupying time according to the time indication information.
3. The uplink signal transmission method according to claim 1, wherein determining whether the uplink signal to be transmitted and the downlink signal are quasi-co-sited sites comprises:
determining a signal of a wave beam in the same direction as the uplink signal to be transmitted, and recording the signal as a second reference signal;
determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal;
searching a predefined table, and determining whether the second reference signal and the first reference signal are quasi co-sited;
if at least one second reference signal and at least one first reference signal are in a quasi-common-station-address relationship, determining that the uplink signal to be transmitted and the downlink signal are in a quasi-common-station-address relationship;
the predefined table includes a quasi co-site relationship between each second reference signal and each first reference signal.
4. The uplink signal transmission method according to claim 1, further comprising:
if the uplink signal to be sent and the downlink signal are not quasi co-site, determining the uplink signal to be sent which has a quasi co-site relation with the downlink signal and recording as a quasi co-site uplink signal;
and determining the wave beam of the uplink data to be transmitted based on the quasi-common-site downlink signal.
5. The uplink signal transmission method according to claim 4, wherein determining the uplink signal to be transmitted having a quasi-co-site relationship with the downlink signal comprises:
determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal;
searching a predefined table, and determining a second reference signal which is in a quasi-co-site relation with the first reference signal;
determining a signal of a wave beam in the same direction as the second reference signal according to the second reference signal, and using the signal as an uplink signal having a quasi-co-site relationship with the downlink signal; the predefined table includes a quasi co-site relationship between each of the second reference signals and each of the first reference signals.
6. The uplink signal transmission method according to claim 4, wherein determining a beam of uplink data to be transmitted based on the quasi-common-site downlink signal includes:
determining a signal of a wave beam in the same direction as the downlink signal and recording the signal as a first reference signal;
determining a spatial reception parameter of the first reference signal, wherein the spatial reception parameter is used for indicating a beam direction for transmitting the first reference signal;
and determining the wave beam of the uplink data to be transmitted according to the space receiving parameters.
7. The uplink signal transmission method according to claim 6, wherein determining, according to the spatial reception parameter, a beam of uplink data to be transmitted includes:
and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, selecting the beam with the strongest gain for uplink data transmission.
8. The uplink signal transmission method according to claim 6, wherein determining, according to the spatial reception parameter, a beam of uplink data to be transmitted includes:
and if a plurality of beams exist in the beam direction indicated by the spatial receiving parameter at the sending time of the uplink signal to be sent, arbitrarily selecting one of the beams for uplink data transmission.
9. The uplink signal transmission method according to any one of claims 3, 5 and 6, wherein the first reference signal is selected from the group consisting of: the reference signal, DM-RS, SSB and CSI-RS used for indicating the downlink control channel TCI.
10. The uplink signal transmission method according to claim 3 or 5, wherein the second reference signal is selected from the group consisting of: and the reference signal, the SSB and the CSI-RS are used for indicating the configuration of the uplink transmission SRS resource.
11. The uplink signal transmission method according to claim 1, further comprising:
and if the uplink signal to be sent and the downlink signal are not quasi-co-sited, adopting a first type LBT listening channel.
12. The uplink signal transmission method of claim 1, wherein the downlink signal is selected from the group consisting of: SSB, downlink control channel, downlink data channel, downlink reference signal.
13. An uplink signal transmission method based on an unlicensed spectrum, comprising:
configuring and sending a downlink signal so that a user terminal determines a channel occupying time length according to the downlink signal, then determining whether the sending time of an uplink signal to be sent falls within the channel occupying time length, judging whether the uplink signal to be sent and the downlink signal are quasi co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying time length, and adopting a second type LBT to monitor a channel when the uplink signal to be sent and the downlink signal are quasi co-site.
14. The uplink signal transmission method according to claim 13, wherein the downlink signal includes duration indication information, and the duration indication information is used to indicate the channel occupancy duration.
15. An uplink signal transmission apparatus, comprising:
the receiving module is used for receiving a downlink signal and determining the channel occupying time according to the downlink signal; a determining module, configured to determine whether a sending time of an uplink signal to be sent falls within the channel occupation duration;
a quasi-common-site determining module, configured to determine whether the uplink signal and the downlink signal to be sent are quasi-common-site signals when the signals fall within the channel occupying duration;
and the monitoring module is used for adopting a second type LBT monitoring channel when the station is the quasi-co-sited address.
16. An uplink signal transmission apparatus based on unlicensed spectrum, comprising:
and the configuration sending module is used for configuring and sending the downlink signal so that the user terminal determines the channel occupying duration according to the downlink signal, then determines whether the sending time of the uplink signal to be sent falls within the channel occupying duration, judges whether the uplink signal to be sent and the downlink signal are quasi-co-site or not when the sending time of the uplink signal to be sent falls within the channel occupying duration, and adopts a second type LBT to monitor the channel when the uplink signal to be sent and the downlink signal are quasi-co-site.
17. A storage medium having a computer program stored thereon, wherein the computer program is configured to perform the steps of the unlicensed spectrum based uplink signal transmission method according to any one of claims 1 to 12 or the steps of the unlicensed spectrum based uplink signal transmission method according to any one of claims 13 to 14 when the computer program is executed by a processor.
18. A terminal comprising a memory and a processor, the memory storing thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the unlicensed spectrum based uplink signal transmission method according to any of claims 1 to 12.
19. A base station comprising a memory and a processor, the memory storing a computer program capable of running on the processor, wherein the processor executes the computer program to perform the steps of the unlicensed spectrum based uplink signal transmission method according to any one of claims 13 to 14.
CN202110008147.5A 2021-01-05 2021-01-05 Uplink signal transmission method and device, storage medium, terminal and base station Pending CN114727421A (en)

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