CN113472494B - Uplink transmission channel access method and device, storage medium and terminal - Google Patents
Uplink transmission channel access method and device, storage medium and terminal Download PDFInfo
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- CN113472494B CN113472494B CN202010245396.1A CN202010245396A CN113472494B CN 113472494 B CN113472494 B CN 113472494B CN 202010245396 A CN202010245396 A CN 202010245396A CN 113472494 B CN113472494 B CN 113472494B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
Abstract
A channel access method and device for uplink transmission, a storage medium and a terminal are provided, wherein the method comprises the following steps: when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in channel occupation; when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval refers to the time difference between the uplink transmission and the downlink transmission; and after the interval, continuing uplink transmission by adopting the channel access type after the interval. The scheme of the application provides better channel access logic, and is beneficial to better adapting to the low-delay and high-reliability requirements of URLLC service when the continuous uplink transmission is interrupted or segmented.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and apparatus for accessing an uplink channel, a storage medium, and a terminal.
Background
The existing channel access mode of continuous uplink transmission is inflexible. Specifically, when there is no gap between uplink transmissions, it is instructed to determine which channel access method to use according to whether the channel occupancy time is within the downlink control information (Downlink Control Information, DCI for short). When there is an interval in the uplink transmission, the channel access mode after the interval is determined according to whether the channel is idle in the interval.
In Ultra Reliable and low-delay communication (Ultra-Reliable & Low Latency Communication, or uRLLC) transmission, a physical uplink shared channel (Physical Uplink Shared Channel, or PUSCH) repetition mode (called PUSCH repetition type B, PUSCH repetition type B) is supported for reducing the time delay and increasing the reliability. When this repetition is adopted, PUSCH (including uplink grant scheduling PUSCH and configuration grant PUSCH) is repeatedly transmitted in a slot. When the time of PUSCH retransmission overlaps with a downlink symbol or an unavailable (invalid) symbol configured by higher layer signaling, PUSCH is segmented to stagger the unused symbols. PUSCH transmission interruption due to these unavailable symbols-referred to as transmission interval, interval for short. The time difference between the reception of an uplink transmission from the downlink in an interval is called a gap, which is affected by Timing Advance (TA for short) and the switching time between the downlink transmission and the uplink transmission.
It can be seen that if the channel access mode of the existing continuous uplink transmission is adopted, it is simply determined whether the channel is idle in the interval according to the User Equipment (UE) to determine the channel access type of the uplink channel, which cannot well meet the requirements of low latency and high reliability of the ul lc service.
Disclosure of Invention
The technical problem solved by the application is how to optimize the channel access logic during continuous uplink transmission to better adapt to the low latency and high reliability requirements of the URLLC service.
In order to solve the above technical problems, an embodiment of the present application provides a channel access method for uplink transmission, including: when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in channel occupation; when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval refers to the time difference between the uplink transmission and the downlink transmission; and after the interval, adopting the channel access type after the interval to carry out channel access so as to judge whether uplink transmission can be continued.
Optionally, the channel access method further includes: and when the judgment result shows that the uplink transmission after the interval is not in the channel occupation, after the interval, adopting a type 1 channel access type to carry out channel access so as to judge whether the uplink transmission can be continued.
Optionally, the determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval includes: judging whether the high-layer signaling or the DCI for scheduling the uplink transmission contains post-interval indication information or not, wherein the post-interval indication information comprises the post-interval channel access type; when the judgment result shows that the high-layer signaling and the DCI do not contain the indication information after the interval and the interval comprises a downlink symbol, determining an initial channel access type indicated by the DCI or a channel access type adopted in the first uplink transmission as the channel access type after the interval; and when the judgment result shows that the high-layer signaling and the DCI do not contain the post-interval indication information and the interval only contains unavailable symbols, determining that the post-interval channel access type is a type 2 channel access type.
Optionally, the determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval further includes: and when the judgment result shows that the DCI contains the indication information after the interval, determining the channel access type after the interval according to the indication information after the interval.
Optionally, the indication information after interval further includes CP extension and CAPC information.
Optionally, when the judging result indicates that the DCI does not include the post-interval indication information and the interval includes only unavailable symbols, determining the post-interval channel access type according to the length of the interval and/or the symbol type of the symbols in the interval further includes: and selecting one of a plurality of candidate CP lengths configured by the high-layer signaling as the CP extension when the access type is adopted for uplink transmission after the interval, and determining CAPC information.
Optionally, when the post-interval indication information is included in the higher layer signaling, different gap lengths and/or symbol types of symbols in the interval are associated with different post-interval indication information.
Optionally, the determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval further includes: when the judgment result shows that the high-layer signaling contains the post-interval indication information and the interval comprises a downlink symbol, determining the post-interval channel access type according to the post-interval indication information associated with the downlink symbol; when the judgment result shows that the high-layer signaling comprises the post-interval indication information and the interval only comprises the unavailable symbols, the post-interval indication information associated with the unavailable symbols is determined to determine the post-interval channel access type.
In order to solve the above technical problem, an embodiment of the present application further provides a channel access device for uplink transmission, including: the judging module is used for judging whether the uplink transmission after the interval is still in the channel occupation or not when the interval exists in the uplink transmission; the determining module is used for determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, wherein the interval is the time difference between the uplink transmission and the downlink transmission; and the transmission module is used for carrying out channel access by adopting the channel access type after the interval so as to judge whether uplink transmission can be continued.
To solve the above technical problem, an embodiment of the present application further provides a storage medium having stored thereon computer instructions that execute the steps of the above method when the computer instructions are run.
In order to solve the technical problem, the embodiment of the application also provides a terminal, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the method when running the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a channel access method for uplink transmission, which comprises the following steps: when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in channel occupation; when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval refers to the time difference between the uplink transmission and the downlink transmission; and after the interval, adopting the channel access type after the interval to carry out channel access so as to judge whether uplink transmission can be continued.
Compared with the existing channel access logic for continuous uplink transmission, when the uplink continuous transmission is interrupted or segmented, the UE adopting the scheme of the embodiment can adopt better channel access logic so as to better adapt to the low-delay and high-reliability requirements of URLLC service. Firstly, judging whether the uplink transmission after the interval is still in the channel occupation or not, so as to determine the large direction of the channel access mode after the interval. Specifically, whether or not the channel is still occupied after the interval relates to which channel access method is adopted after the interval. While theoretically, channels that are within the channel occupancy period should remain occupied by the base station and not be occupied by other base stations. Therefore, the judging step can be executed to determine the state of the channel after the interval, and channel detection operation is not needed in the interval, so that the power consumption of the UE is saved. And because the channel detection result in the interval is not required to be waited, the corresponding channel access operation can be executed immediately according to the judgment result after the interval, thereby meeting the low-delay requirement. Further, on the premise of still being occupied by channels, the most suitable channel access type is flexibly adopted according to the specific conditions of the interval, so that the success rate of channel access after the interval is improved, and the requirement of high reliability is better met.
Drawings
Fig. 1 is a flowchart of a channel access method for uplink transmission according to an embodiment of the present application;
FIG. 2 is a flow chart of one embodiment of step S102 of FIG. 1;
fig. 3 is a schematic structural diagram of an uplink channel access device according to an embodiment of the present application.
Detailed Description
As understood by those skilled in the art, as described in the background art, the low latency and high reliability requirements of the ul lc service cannot be met by the channel access method adopted by the existing continuous uplink transmission.
Specifically, the following situations may be included in the channel access of the continuous uplink transmission:
if the uplink grant schedules the UE to transmit a plurality of uplink transmissions, and the UE cannot access the channel in the last transmission, the UE still adopts the channel access type indicated in the uplink grant to attempt channel access before the next transmission.
If the UE is scheduled to transmit a number of consecutive and non-spaced Uplink (UL) transmissions, the UE may continuously transmit these Uplink channels after accessing the channels.
If the consecutive uplink transmission includes an interval, the UE monitors the channel for an interval (gap). If the channel is idle in this interval, the UE transmits the uplink channel using a type 2 (type 2) channel access procedure. If the channel is busy during this interval, the UE transmits the uplink channel using a type 1 (type 1) channel access procedure.
The inventor of the present application has found through analysis that the above-mentioned channel access mode of the existing continuous uplink transmission is not flexible enough, for example, when an interval occurs, the channel access type after the interval needs to be determined according to the channel state monitoring in the interval. On one hand, a channel needs to be monitored in an interval, so that the UE consumes large power; on the other hand, the channel state in the interval cannot effectively reflect the actual situation in the interval, so that the determined channel access mode after the interval is not necessarily suitable for the UE, and even the time delay and the reliability are affected.
In order to solve the above technical problems, an embodiment of the present application provides a channel access method for uplink transmission, including: when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in channel occupation; when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval refers to the time difference between the uplink transmission and the downlink transmission; and after the interval, adopting the channel access type after the interval to carry out channel access so as to judge whether uplink transmission can be continued.
When the uplink continuous transmission is interrupted or segmented, the UE adopting the scheme of the embodiment can adopt better channel access logic so as to better adapt to the low-delay and high-reliability requirements of the URLLC service. Firstly, judging whether the uplink transmission after the interval is still in the channel occupation or not, so as to determine the large direction of the channel access mode after the interval.
Specifically, whether or not the channel is still occupied after the interval relates to which channel access method is adopted after the interval. While theoretically, channels that are within the channel occupancy period should remain occupied by the base station and not be occupied by other base stations. Therefore, the judging step can be executed to determine the state of the channel after the interval, and channel detection operation is not needed in the interval, so that the power consumption of the UE is saved. And because the channel detection result in the interval is not required to be waited, the corresponding channel access operation can be executed immediately according to the judgment result after the interval, thereby meeting the low-delay requirement.
Further, on the premise of still being occupied by channels, the most suitable channel access type is flexibly adopted according to the specific conditions of the interval, so that the success rate of channel access after the interval is improved, and the requirement of high reliability is better met.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a channel access method for uplink transmission according to an embodiment of the present application. The solution of this embodiment may be performed by a UE on the user equipment side, such as the UE on the user equipment side. The scheme of the embodiment can be applied to scenes with high requirements on time delay and reliability, such as uRLLC service scenes.
Specifically, referring to fig. 1, the channel access method for uplink transmission according to the present embodiment may include the following steps:
step S101, when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in the channel occupation;
when the result of the determination in step S101 is affirmative, that is, the uplink transmission after the interval is still in the channel occupation, the method further includes: step S102, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval is the time difference between uplink transmission and downlink reception; step S103, after the interval, adopting the channel access type after the interval to carry out channel access so as to judge whether uplink transmission can be continued.
When the determination result in step S101 is negative, that is, the uplink transmission after the interval is not in the channel occupation, the method further includes: step S104, after the interval, adopting the type 1 channel access type to carry out channel access so as to judge whether the uplink transmission can be continued.
More specifically, the uplink transmission may be PUSCH repeated transmission. Wherein, the PUSCH may include a PUSCH of a scheduling grant and a PUSCH of a configuration grant.
Further, in the step S101, it may be determined whether the uplink transmission after the interval is still in channel occupation according to the channel occupation duration of the uplink transmission.
The channel occupation duration may be preconfigured or indicated according to a high-layer signaling, DCI, protocol, etc.
In one implementation, referring to fig. 2, the step S102 may include the following steps:
step S1021, judging whether the high-layer signaling or the DCI for scheduling the uplink transmission contains the indication information after the interval, wherein the indication information after the interval comprises the channel access type after the interval;
when the determination result of step S1021 is negative, that is, the higher layer signaling and DCI do not include the post-interval indication information, and the interval includes a downlink symbol, the method further includes: step S1022, determining the initial channel access type indicated by DCI or the channel access type adopted in the first uplink transmission as the channel access type after the interval;
when the determination result of step 1021 is negative, that is, the higher layer signaling and DCI do not include the post-interval indication information, and the interval includes only the unavailable symbol, the method further includes: step S1023, determining the channel access type after the interval as a type 2 channel access type.
When the determination result of the step S1021 is affirmative, that is, the DCI includes the post-interval indication information, the method further includes: step S1024, determining the channel access type after the interval according to the indication information after the interval.
Specifically, the indication information after the interval may be indication information for indicating that the UE performs channel access after the interval. The indication information after the interval may include a channel access type after the interval, a Cyclic Prefix (CP) increase, and channel access priority (Channel Access Priority Class, CAPC) joint coding information (CAPC information).
The post-interval indication information may be determined according to the length of the corresponding interval and/or the type of symbol within the interval.
For example, when the length of the gap is short (e.g., 16 us), the type 2C channel access type may be used to continue uplink transmission. For another example, when the length of the gap is longer (e.g., 25 us), the uplink transmission may be continued using the type 2A channel access type.
For example, when the interval contains at least a semi-static downlink symbol, an initial channel access type indicated in the DCI may be used, or a channel access type used at the time of the first uplink transmission may be used. For another example, a type 2 channel access type may be employed when the interval contains only unavailable symbols.
For example, when the length of the gap is long and at least includes semi-static downlink symbols, a type 2C channel access type may be employed.
In the scheduling grant PUSCH scenario, for each interval in the uplink transmission of the present scheduling, the corresponding interval post indication information may be added in the DCI. In response to receiving the DCI, the UE may determine corresponding post-interval channel access logic according to the post-interval indication information therein.
In the configuration grant PUSCH scenario, the interval post indication information may be added in higher layer signaling. And, different gap lengths and/or symbol types of symbols within the gap, different post-gap indication information is associated. The different indication information after interval is configured to the UE in advance through a high-layer signaling, the UE selects proper indication information after interval according to the gap length of the current interval and the symbol type in the interval during uplink transmission, and the channel access logic indicated by the indication information after interval performs channel access operation after interval. For example, when the length of the gap is longer and the symbol in the gap includes a downlink symbol, the post-gap channel access type in the post-gap indication information may be a type 2C channel access type.
For example, the step S1024 may include: and when the interval comprises a downlink symbol, determining the channel access type after the interval according to the indication information after the interval associated with the downlink symbol. Specifically, when the interval is the downlink symbol, the UE determines the channel access type after the interval according to the interval between the uplink transmission and the downlink symbol.
For another example, the step S1024 may further include: when the interval only contains unavailable symbols, determining post-interval indication information associated with the unavailable symbols to determine the post-interval channel access type. Specifically, when the interval is finally an unavailable symbol, the UE determines the channel access type after the interval according to the interval between the uplink transmission and the unavailable symbol.
Further, the post-interval indication information of PUSCH configuration of different Configuration Grants (CG) may be different.
In an implementation, if the higher layer signaling and the DCI do not carry the post-interval indication information, the channel access type after the current interval may be determined according to the length of the current interval and/or the type of the symbol in the interval.
For example, in the step S1022, the interval including the downlink symbol may refer to: the interval comprises a semi-static downlink symbol; alternatively, the interval includes semi-static downlink symbols and unavailable symbols.
Further, in the step S1022, in the scheduling grant PUSCH scenario, the initial channel access type indicated by the DCI may be determined as the post-interval channel access type. In the case of configuring the authorized PUSCH, the channel access type adopted in the first uplink transmission may be determined as the channel access type after the interval.
In one implementation, in the step S1023, one of the candidate CP lengths configured by the higher layer signaling may be selected as a CP extension when the post-interval access type is adopted for uplink transmission, and CAPC information may be determined.
Specifically, the higher layer signaling may pre-configure a number of CP lengths, which may be candidate values for CP extension after an interval is determined when the UE is spaced within the occupied channel duration.
In a typical application scenario, when PUSCH repetition transmission is scheduling grant, it may be determined whether DCI (or higher layer signaling) contains post-interval indication information and whether post-interval PUSCH transmission is still in channel occupancy.
And if the post-interval indication information is included and still in the channel occupation, performing channel access according to the post-interval channel access type indicated by the post-interval indication information. Specifically, if the post-interval indication information is included in the DCI, the post-interval access type is determined directly according to the post-interval indication information. If the post-interval indication information is included in the high-level signaling, the associated post-interval indication information is selected according to the length of the interval and/or the type of the symbol in the interval, and the post-interval access type is determined according to the selected post-interval indication information.
If the post-interval indication information is not contained but still in the channel occupation, the post-interval channel access type is determined according to the length and/or the type of the interval in repeated transmission. Specifically, when the interval contains at least a semi-static downlink symbol, the PUSCH after the interval repeatedly adopts the initial channel access type, CP extension, and CAPC information indicated in the DCI. When the interval only contains unavailable symbols, the PUSCH after the interval repeatedly adopts a type 2 channel access mode. The CP length may be any of type 2A, type 2B and type 2C, and is also selected from a number of candidate CP lengths configured by higher layer signaling, and the CAPC information is determined by the UE itself. Alternatively, one of the channel access modes, such as type 2A channel access, may be fixedly employed.
And if the spaced PUSCH transmission is not in the channel occupation, adopting a type 1 channel access type to transmit PUSCH repetition.
In another typical application scenario, when PUSCH repetition transmission is configuration grant, it may be determined whether higher layer signaling contains post-interval indication information, and whether post-interval PUSCH transmission is still in channel occupancy.
And if the post-interval indication information is included and still in the channel occupation, performing channel access according to the post-interval channel access type indicated by the post-interval indication information. Specifically, the associated post-interval indication information is selected according to the length of the interval and/or the type of the symbol in the interval, and the post-interval access type is determined according to the selected post-interval indication information.
If the post-interval indication information is not contained but still in the channel occupation, the post-interval channel access type is determined according to the length and/or the type of the interval in repeated transmission. Specifically, when the interval contains at least a semi-static downlink symbol, the PUSCH after the interval repeatedly adopts the channel access type, CP extension, and CAPC information adopted when the PUSCH is transmitted for the first time. When the interval only contains unavailable symbols, the PUSCH after the interval repeatedly adopts a type 2 channel access mode. The CP length may be any of type 2A, type 2B and type 2C, and is also selected from a number of candidate CP lengths configured by higher layer signaling, and the CAPC information is determined by the UE itself. Alternatively, one of the channel access modes, such as type 2A channel access, may be fixedly employed.
And if the spaced PUSCH transmission is not in the channel occupation, adopting a type 1 channel access type to transmit PUSCH repetition.
In one implementation, if the DCI received by the UE includes an indication of downlink to uplink shared channel and one or more repeated transmissions of the scheduling grant PUSCH are within a channel occupation duration and an available frequency domain, the UE may switch from a type 1 channel access procedure to a type 2A channel access procedure.
By the above, when the uplink continuous transmission is interrupted or segmented, the UE adopting the scheme of the embodiment can adopt better channel access logic so as to better adapt to the low-delay and high-reliability requirements of URLLC service. Firstly, judging whether the uplink transmission after the interval is still in the channel occupation or not, so as to determine the large direction of the channel access mode after the interval. Specifically, whether or not the channel is still occupied after the interval relates to which channel access method is adopted after the interval. While theoretically, channels that are within the channel occupancy period should remain occupied by the base station and not be occupied by other base stations. Therefore, the judging step can be executed to determine the state of the channel after the interval, and channel detection operation is not needed in the interval, so that the power consumption of the UE is saved. And because the channel detection result in the interval is not required to be waited, the corresponding channel access operation can be executed immediately according to the judgment result after the interval, thereby meeting the low-delay requirement. Further, on the premise of still being occupied by channels, the most suitable channel access type is flexibly adopted according to the specific conditions of the interval, so that the success rate of channel access after the interval is improved, and the requirement of high reliability is better met.
Fig. 3 is a schematic structural diagram of an uplink channel access device according to an embodiment of the present application. It will be appreciated by those skilled in the art that the channel access device 3 for uplink transmission (hereinafter referred to simply as the channel access device 3) in this embodiment may be used to implement the method technical solutions described in the embodiments shown in fig. 1 and fig. 2.
Specifically, the channel access device 3 in this embodiment may include: a judging module 31, configured to judge whether the uplink transmission after the interval is still in channel occupation when the interval exists between the uplink transmissions; a determining module 32, configured to determine a post-interval channel access type according to a length of a gap and/or a symbol type of a symbol in the interval when the judgment result indicates that the post-interval uplink transmission is still in channel occupation, where the gap is a time difference between uplink transmission and downlink reception; and the transmission module 33 is configured to perform channel access by using the channel access type after the interval to determine whether uplink transmission can be continued.
For more details on the working principle and the working manner of the channel access device 3, reference may be made to the related descriptions in fig. 1 and fig. 2, which are not repeated here.
Further, the embodiment of the application also discloses a storage medium, on which computer instructions are stored, and the computer instructions execute the technical scheme of the method described in the embodiment shown in the above fig. 1 and fig. 2 when running. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transitory) memory. The storage medium may include ROM, RAM, magnetic or optical disks, and the like.
Further, the embodiment of the application also discloses a terminal, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the technical scheme of the method in the embodiment shown in the figures 1 and 2 when running the computer instructions. Preferably, the terminal may be a User Equipment (UE).
Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application should be assessed accordingly to that of the appended claims.
Claims (10)
1. A channel access method for uplink transmission, comprising:
when the uplink transmission has an interval, judging whether the uplink transmission after the interval is still in channel occupation according to the channel occupation time length of the current uplink transmission;
when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval, wherein the interval refers to the time difference between the uplink transmission and the downlink transmission;
after the interval, adopting the channel access type after the interval to carry out channel access so as to judge whether uplink transmission can be continued or not;
wherein the determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval comprises:
judging whether the high-layer signaling or the DCI for scheduling the uplink transmission contains indication information after the interval, wherein the indication information after the interval is used for indicating the UE to carry out channel access after the interval, and the indication information after the interval comprises the type of the channel access after the interval;
when the judgment result shows that the high-layer signaling and the DCI do not contain the indication information after the interval and the interval comprises a downlink symbol, determining an initial channel access type indicated by the DCI or a channel access type adopted in the first uplink transmission as the channel access type after the interval;
and when the judgment result shows that the high-layer signaling and the DCI do not contain the post-interval indication information and the interval only contains unavailable symbols, determining that the post-interval channel access type is a type 2 channel access type.
2. The channel access method of claim 1, further comprising:
and when the judgment result shows that the uplink transmission after the interval is not in the channel occupation, after the interval, adopting a type 1 channel access type to carry out channel access so as to judge whether the uplink transmission can be continued.
3. The channel access method according to claim 1, wherein said determining the post-interval channel access type according to the length of the gap and/or the symbol type of the symbols in the interval further comprises:
and when the judgment result shows that the DCI contains the indication information after the interval, determining the channel access type after the interval according to the indication information after the interval.
4. The channel access method of claim 1, wherein the post-interval indication information further comprises CP extension and CAPC information.
5. The channel access method according to claim 1, wherein when the judging result indicates that the DCI does not include the post-interval indication information and the interval includes only unavailable symbols, the determining the post-interval channel access type according to a length of the interval and/or a symbol type of symbols in the interval further includes:
and selecting one of a plurality of candidate CP lengths configured by the high-layer signaling as the CP extension when the access type is adopted for uplink transmission after the interval, and determining CAPC information.
6. Channel access method according to claim 1, characterized in that when the post-interval indication information is comprised in the higher layer signaling, different gap lengths and/or symbol types of symbols within an interval are associated with different post-interval indication information.
7. The channel access method according to claim 6, wherein said determining the post-interval channel access type according to the length of the gap and/or the symbol type of the symbols in the interval further comprises:
when the judgment result shows that the high-layer signaling contains the post-interval indication information and the interval comprises a downlink symbol, determining the post-interval channel access type according to the post-interval indication information associated with the downlink symbol;
when the judgment result shows that the high-layer signaling comprises the post-interval indication information and the interval only comprises the unavailable symbols, the post-interval indication information associated with the unavailable symbols is determined to determine the post-interval channel access type.
8. A channel access device for uplink transmission, comprising:
the judging module is used for judging whether the uplink transmission after the interval is still in the channel occupation according to the channel occupation duration of the uplink transmission when the interval exists in the uplink transmission;
the determining module is used for determining the channel access type after the interval according to the length of the interval and/or the symbol type of the symbol in the interval when the judgment result shows that the uplink transmission after the interval is still in the channel occupation, wherein the interval is the time difference between the uplink transmission and the downlink transmission;
the transmission module is used for carrying out channel access by adopting the channel access type after the interval so as to judge whether uplink transmission can be continued or not;
wherein the determining module performs the steps of:
judging whether the high-layer signaling or the DCI for scheduling the uplink transmission contains indication information after the interval, wherein the indication information after the interval is used for indicating the UE to carry out channel access after the interval, and the indication information after the interval comprises the type of the channel access after the interval;
when the judgment result shows that the high-layer signaling and the DCI do not contain the indication information after the interval and the interval comprises a downlink symbol, determining an initial channel access type indicated by the DCI or a channel access type adopted in the first uplink transmission as the channel access type after the interval;
and when the judgment result shows that the high-layer signaling and the DCI do not contain the post-interval indication information and the interval only contains unavailable symbols, determining that the post-interval channel access type is a type 2 channel access type.
9. A computer readable storage medium having stored thereon computer instructions, which when executed by a processor perform the steps of the method of any of claims 1 to 7.
10. 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 of any of claims 1 to 7.
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