CN109845383B

CN109845383B - Method, device, equipment and storage medium for sending uplink transmission

Info

Publication number: CN109845383B
Application number: CN201980000081.6A
Authority: CN
Inventors: 江小威
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2023-05-30
Anticipated expiration: 2039-01-18
Also published as: CN116614895A; CN109845383A; WO2020147128A1

Abstract

The disclosure relates to a method, a device, equipment and a storage medium for sending uplink transmission, and belongs to the field of communication. The method comprises the following steps: and when LBT is successful on the unlicensed frequency band and there is no second uplink transmission or measurement interval overlapped with the first uplink transmission, the terminal sends the first uplink transmission on the unlicensed frequency band. When a plurality of transmissions exist in the terminal, the terminal successfully LBT on the unlicensed frequency band, and a second uplink transmission or a measurement interval overlapped with the first uplink transmission does not exist, the first uplink transmission is sent on the unlicensed frequency band, and collision of the terminal when the first uplink transmission is sent is avoided.

Description

Method, device, equipment and storage medium for sending uplink transmission

Technical Field

The present disclosure relates to the field of communications, and in particular, to a method, an apparatus, a device, and a storage medium for transmitting uplink transmission.

Background

The standardization of the new air interface unlicensed (New Radio unlicensed, NR-U) is ongoing, the purpose of this partial standardization being to enable the NR system to operate in unlicensed band.

Because there are multiple WIreless transmission technologies that use unlicensed frequency bands for transmission, such as WIreless-FIdelity (WIFI), it is necessary to ensure that the frequency bands are fairly used among the multiple WIreless transmission technologies. The NR system adopts a Listen-Before-Talk (LBT) mechanism to ensure fairness, that is, before the UE transmits uplink data, it needs to monitor for a period of time, and the UE can transmit the uplink data only when it is ensured that the channel is idle.

Disclosure of Invention

The embodiment of the disclosure provides a method, a device, equipment and a storage medium for sending uplink transmission, which can solve the problem of how to carry out uplink transmission if a plurality of uplink transmissions exist in a UE in an NR-U scene, and the technical scheme is as follows:

according to an aspect of the embodiments of the present disclosure, there is provided a method for transmitting uplink transmission, including:

and when LBT is successful on the unlicensed frequency band and a second uplink transmission or measurement interval overlapped with the first uplink transmission does not exist, the terminal sends the first uplink transmission on the unlicensed frequency band.

When LBT is successful on the unlicensed band and there is the second uplink transmission overlapping the first uplink transmission, the terminal preferentially transmits at least one of the first uplink transmission and the second uplink transmission.

In an alternative embodiment, when the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition, the terminal sends the first uplink transmission and the second uplink transmission on the unlicensed frequency band simultaneously.

Optionally, the simultaneous transmission condition includes: the first uplink transmission and the second uplink transmission conform to a predefined transmission type; and/or the transmitting power of the terminal meets the power required by the simultaneous transmission of the first uplink transmission and the second uplink transmission.

In another alternative embodiment, when the priority of the first uplink transmission is higher than the priority of the second uplink transmission, the terminal sends the first uplink transmission on the unlicensed frequency band.

In another optional implementation manner, when the priority of the first uplink transmission is lower than the priority of the second uplink transmission, the terminal sends the first uplink transmission after completing sending the second uplink transmission on the unlicensed frequency band.

Optionally, after the terminal finishes sending the second uplink transmission on the unlicensed frequency band, performing LBT on the unlicensed frequency band again;

and the terminal sends the first uplink transmission on the unlicensed frequency band when the LBT is successful.

In another optional implementation manner, the terminal extends the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, sends the first uplink transmission.

Optionally, the terminal prolongs the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, re-performs another LBT, where the channel evaluation duration of the another LBT is equal to the target duration; the target duration is a larger value of a transmission remaining duration of the second uplink transmission and a channel evaluation duration of a next round of LBT.

In another alternative embodiment, when LBT is successful on the unlicensed band, and the measurement interval overlapping with the first uplink transmission exists, and the type of the first uplink transmission is a predetermined type, the terminal sends the first uplink transmission on the unlicensed band.

Optionally, before the terminal sends the first uplink transmission on the unlicensed frequency band, the terminal performs the LBT on the unlicensed frequency band; when the LBT is successful, the terminal determines whether the second uplink transmission overlapping the first uplink transmission or the measurement interval exists.

Optionally, determining whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists, and directly performing LBT on the unlicensed frequency band; or when the second uplink transmission overlapped with the first uplink transmission or the measurement interval does not exist, performing LBT on the unlicensed frequency band; or when the second uplink transmission overlapped with the first uplink transmission exists and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, performing LBT on the unlicensed frequency band.

In another optional implementation manner, the physical layer of the terminal performs LBT on the unlicensed frequency band;

when the LBT is successful, the physical layer of the terminal sends a first indication to the MAC layer of the terminal;

after receiving the first indication, the MAC layer of the terminal determines whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists;

and when the MAC layer of the terminal does not have a second uplink transmission or measurement interval overlapped with the first uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission on the unlicensed frequency band.

and when the second uplink transmission overlapped with the first uplink transmission exists, the MAC layer of the terminal indicates the physical layer of the terminal to transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission preferentially.

And when the LBT is successful on the unlicensed frequency band and there is no second uplink transmission or measurement interval overlapping with the first uplink transmission, the terminal sends the first uplink transmission on the unlicensed frequency band, including:

and when the physical layer of the terminal does not have a second uplink transmission or measurement interval overlapped with the first uplink transmission, the physical layer of the terminal transmits the first uplink transmission on the unlicensed frequency band.

When the LBT is successful, the physical layer of the terminal determines whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists;

when the physical layer of the terminal determines that the second uplink transmission overlapped with the first uplink transmission exists, the physical layer of the terminal sends a second indication to the MAC layer of the terminal;

after receiving the second instruction, the MAC layer of the terminal instructs the physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when there is the second uplink transmission overlapping with the first uplink transmission.

According to another aspect of the embodiments of the present disclosure, there is provided a transmitting apparatus for uplink transmission, including:

And the sending module is configured to send the first uplink transmission on the unlicensed frequency band when LBT is successful on the unlicensed frequency band and a second uplink transmission or measurement interval overlapped with the first uplink transmission does not exist.

The sending module is configured to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when LBT is successful on the unlicensed frequency band and there is the second uplink transmission overlapping the first uplink transmission.

In another optional implementation manner, the sending module is configured to send the first uplink transmission and the second uplink transmission simultaneously on the unlicensed frequency band when the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition.

In another optional implementation manner, the sending module is configured to send the first uplink transmission on the unlicensed frequency band when the priority of the first uplink transmission is higher than the priority of the second uplink transmission.

In another optional implementation manner, the sending module is configured to send the first uplink transmission after the second uplink transmission is sent on the unlicensed frequency band is completed when the priority of the first uplink transmission is lower than the priority of the second uplink transmission.

Optionally, the sending module is configured to perform LBT on the unlicensed frequency band again after the second uplink transmission is sent on the unlicensed frequency band; the sending module is configured to send the first uplink transmission on the unlicensed frequency band when the LBT is successful.

In another optional implementation manner, the sending module is configured to extend the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, send the first uplink transmission.

Optionally, the sending module is configured to extend the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, re-perform another LBT, where a channel evaluation duration of the another LBT is equal to a target duration; the target duration is a larger value of a transmission remaining duration of the second uplink transmission and a channel evaluation duration of a next round of LBT.

In another alternative embodiment, the sending module is configured to send the first uplink transmission on the unlicensed frequency band when LBT is successful on the unlicensed frequency band, the measurement interval overlapping the first uplink transmission exists, and the type of the first uplink transmission is a predetermined type.

Optionally, the transmitting module is configured to perform the LBT on the unlicensed frequency band before the first uplink transmission is transmitted on the unlicensed frequency band; a determining module configured to determine whether the second uplink transmission or the measurement interval overlapping the first uplink transmission exists when the LBT is successful.

Optionally, the sending module is configured to directly perform LBT on the unlicensed frequency band without determining whether the second uplink transmission or the measurement interval overlapped with the first uplink transmission exists; or, the sending module is configured to perform LBT on the unlicensed frequency band when it is determined that the second uplink transmission overlapping with the first uplink transmission or the measurement interval does not exist; or the sending module is configured to perform LBT on the unlicensed frequency band when it is determined that the second uplink transmission overlapping with the first uplink transmission exists and the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition.

In another optional implementation manner, the sending module is configured to perform LBT on the unlicensed frequency band;

the sending module is configured to send a first indication to the MAC layer of the terminal when the LBT is successful;

the determining module is configured to determine whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists after receiving the first indication;

the sending module is configured to instruct a physical layer of the terminal to send the first uplink transmission on the unlicensed frequency band when there is no second uplink transmission or measurement interval overlapping with the first uplink transmission.

the sending module is configured to instruct a physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when the second uplink transmission overlapped with the first uplink transmission exists.

the determining module is configured to determine whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists when LBT is successful on the unlicensed frequency band;

the sending module is configured to send the first uplink transmission on the unlicensed frequency band when there is no second uplink transmission or measurement interval overlapping the first uplink transmission.

The determining module is configured to determine whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists when the LBT is successful;

the sending module is configured to send a second indication to the MAC layer of the terminal when the physical layer of the terminal determines that the second uplink transmission overlapped with the first uplink transmission exists;

the sending module is configured to instruct a physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when the second uplink transmission overlapped with the first uplink transmission exists after receiving the second instruction.

According to another aspect of the embodiments of the present disclosure, there is provided a terminal including: a processor; a transceiver coupled to the processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the method of transmitting uplink transmissions as described above.

According to another aspect of the embodiments of the present disclosure, there is provided a chip including a programmable logic circuit and/or program instructions, which when executed, implement the transmission method of uplink transmission as described above.

According to another aspect of the embodiments of the present disclosure, there is provided a computer storage medium including programmable logic circuits and/or program instructions, which when executed, implement a transmission method of uplink transmission as described above.

According to another aspect of the disclosed embodiments, a computer program product is provided, which comprises programmable logic circuits and/or program instructions, which when run, implement the method of transmitting an uplink transmission as described above.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

When a plurality of transmissions exist in the terminal, the terminal successfully LBT on the unlicensed frequency band, and when a second uplink transmission or measurement interval overlapped with the first uplink transmission does not exist, the first uplink transmission is sent on the unlicensed frequency band, so that collision of the terminal when the first uplink transmission is sent is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram of the architecture of an NR protocol stack;

fig. 2 is a schematic diagram of an implementation environment of a method for sending uplink transmission according to an exemplary embodiment of the present disclosure;

fig. 3 is a flowchart of a method for transmitting uplink transmission according to an exemplary embodiment of the present disclosure;

fig. 4 is a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure;

fig. 5 is a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure;

fig. 6 is a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure;

Fig. 7 is a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure;

fig. 8 is a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a transmitting device for uplink transmission according to an exemplary embodiment of the present disclosure;

fig. 10 is a schematic structural view of a terminal provided in an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The NR-U is used for enabling the NR system to work on an unlicensed frequency band, and the working scene of the NR-U comprises at least one of the following scenes:

NR authorization and NR unauthorized carrier aggregation, NR authorization cell is the main cell;

a dual connection between licensed band long term evolution (Long Term Evolution, LTE) and NR-U, i.e. a dual connection between a primary cell and a primary and secondary cell; NR-U works independently;

The NR-U independently working cell adopts an authorized frequency band during uplink transmission;

the dual connection between the NR licensed band and the NR-U, i.e., the dual connection between the primary cell and the primary and secondary cells.

In the unlicensed band, since more and more communication systems use the unlicensed band at the same time, communication in the unlicensed band generally adopts an LBT mechanism to ensure that a plurality of communication systems use the unlicensed band fairly. The LBT mechanism means that the device needs to monitor the frequency band on the unlicensed frequency band before sending the uplink data, and when the monitored frequency band is idle, the device occupies the frequency band to send the uplink data.

Illustratively, the LBT mechanism is a contention window size (Contention Window Size, CWS) variable random back-off LBT mechanism. The transmitting device may adjust the CWS based on the result of the previous transmission. For example, in the data transmitted in a reference time in the previous transmission, the proportion of the data that is not correctly received is X, and when X is greater than a threshold, the CWS value is increased. In order to refine the parameter setting in the LBT process, four priorities are set in the LBT mechanism, each priority corresponds to a different parameter configuration, and data transmission of different traffic types corresponds to a different priority.

Taking LBT Cat.4 as an example, the device firstly detects whether a channel is idle at a first time granularity, if the channel is detected to be idle, a value N of a random number is selected in a first competition window, and channel detection is carried out by taking a second time granularity as a time granularity; if the channel is detected to be idle at the second time granularity and the value of the random number is not 0, subtracting 1 from the value of the random number, and continuing to detect the channel by taking the second time granularity as the time granularity; if the channel is detected to be busy at the second time granularity, channel detection is performed again with the first time granularity as the time granularity; if the channel is detected to be idle again at the first time granularity and the value of the random number is not 0, subtracting 1 from the value of the random number, and recovering to perform channel detection by taking the second time granularity as the time granularity; the channel is not indicated as idle until the value of the random number is reduced to 0.

For example, if the first time granularity is 16us+m×9us and the second time granularity is 9us, detecting whether the channel in 16us+m×9us is idle, if the channel is idle, selecting a value N of a random number in a contention window, detecting with the granularity of 9us, if the channel is idle, detecting with the granularity of N-1, and continuing detecting with the granularity of 9us; otherwise, channel detection is carried out with 16us+Mx 9us as granularity, when the detected channel is idle, N-1 is detected, and detection with 9us as granularity is restored until the random number is 0, so that the channel is idle and can be used.

Wherein the value of M is represented by M in tables-1 and-2 _p And determining that the channel access priority values p are different and the M values are different. Table-1 is the four priority parameter configurations of the downlink LBT Cat.4, table-2 is the four priority parameter configurations of the uplink LBT Cat.4, and the two are only slightly different in configuration values.

TABLE-1

TABLE-2

Of the four channel access priorities shown in the above tables-1 and-2, the smaller the p value, the higher the corresponding priority. m is m _p Is the number of ECCA (Extended Clear Channel, extended clear channel assessment) contained in a delay time, each delay time is defined by a fixed 16us duration and m _p The first temporal granularity, which consists of ECCAs, i.e., described above. CW (continuous wave) _min,p And CW _max,p Is a minimum contention window value and a maximum contention window value, the CWS in the LBT procedure is generated between the two values, and then the contention window CW is generated from 0 to _p The back-off counter N generated randomly in the channel detection process determines the back-off time length in the LBT channel detection process, and T _mcot,p The maximum duration that can occupy the channel after the LBT mechanism corresponding to each priority is successfully executed is longer in the LBT process of priorities 3 and 4 than priorities 1 and 2, and the maximum transmission time that can be occupied by the data transmission using the two priorities is also longer in order to ensure fairness.

It should be noted that the above LBT mechanism is only described by way of example, and as the communication technology evolves, the above LBT mechanism may be changed or a new channel access mechanism may be generated, but all are applicable to the technical solutions described in the present disclosure.

Referring to fig. 1, there is shown a schematic structure of an NR protocol stack, and the protocol stack on the terminal side in the NR system in fig. 1 is, in order from bottom to top, a Physical layer (PHY) 01, a medium access control layer (Medium Access Control, MAC) 02, a radio link control sublayer (Radio Link Control, RLC) 03, a packet data convergence protocol sublayer (Packet Data Convergence Protocol, PDCP) 04, a radio resource control layer (Radio Resource Control, RRC) 05, and a Non-access layer (NAS) 06. The protocols on the base station side are the same as those on the terminal side except that the NAS layer 06 is located on the access and mobility management function (Access and Mobility Management Function, AMF).

When scheduling request (Scheduling Request, SR) transmission is carried out by the NR system, the terminal determines whether physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmission overlapped with the SR transmission exists in the terminal, and after determining that the PUSCH transmission overlapped with the SR transmission does not exist, LBT is carried out on an unlicensed frequency band. The terminal detects that the channel state of the unlicensed frequency band is idle through the LBT, namely, when the LBT is successful, the terminal performs SR transmission.

However, since LBT may last for a period of time, when it is determined that LBT is successful, whether there is an overlap between the SR transmission previously determined by the terminal and the PUSCH transmission may have failed (i.e., the initial determination result is that there is no overlap, but there is an overlap when LBT is successful), and when LBT is successful, there is an overlap between the SR transmission and the PUSCH transmission, resulting in transmission failure.

Fig. 2 is a schematic diagram illustrating an implementation environment of a method for sending uplink transmission according to an exemplary embodiment of the present disclosure, where fig. 2 includes: a terminal 210 and a base station 220.

The number of terminals 210 is typically plural, and one or more terminals 210 may be distributed within a cell managed by each base station 220. The terminal 120 may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile Station (MS), terminal devices (terminal devices), etc. having wireless communication capabilities. The terminal 210 is configured to send a first uplink transmission to the base station 220 on an unlicensed frequency band. When the terminal 210 transmits the first uplink transmission to the base station 220, the idle channel on the unlicensed band is detected through LBT, and when LBT is successful, the terminal 210 immediately transmits the first uplink transmission to the base station 220.

Base station 220 is a device deployed in an access network to provide wireless communication functionality for terminal 210. Base station 110 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in 5G NR systems, called gndeb or gNB. As communication technology evolves, the name "base station" may change. The base station 220 is configured to receive the unlicensed band.

The technical scheme described in the embodiment of the disclosure can be applied to an NR system, and also can be applied to an evolution system subsequent to the NR system.

Fig. 3 shows a flowchart of a method for sending uplink transmission according to an exemplary embodiment of the present disclosure, where the method may be applied to the implementation environment shown in fig. 2, and the method includes:

step 301, before the terminal sends the first uplink transmission on the unlicensed frequency band, LBT is performed on the unlicensed frequency band.

Unlicensed bands are spectrum resources that do not require the license of an regulatory agency and can be used directly as long as they meet the regulations of the regulatory agency (Regulation).

Optionally, before the terminal sends the first uplink transmission on the unlicensed frequency band, it is not determined whether there is a second uplink transmission overlapping with the first uplink transmission, and LBT is directly performed on the unlicensed frequency band.

When LBT is unsuccessful, go to step 302; when LBT is successful, go to step 303.

In step 302, when the LBT is unsuccessful, the terminal lengthens the LBT or resumes the LBT or cancels the present round of transmission.

When LBT is unsuccessful, the terminal determines that other terminals are transmitting uplink on the unlicensed band. The terminal prolongs the LBT of the round or restarts the LBT until determining that the first uplink transmission can be sent; or the terminal cancels the transmission of the round, namely, gives up the transmission of the first uplink transmission of the round.

In step 303, when the LBT is successful, the terminal determines whether there is a second uplink transmission overlapping the first uplink transmission.

When LBT is successful, no other terminals are in uplink transmission on the terminal authorized frequency band. The terminal needs to determine whether there is a second uplink transmission overlapping the first uplink transmission inside the terminal. The first uplink transmission and the second uplink transmission are uplink transmissions sent by the same terminal. The first uplink transmission is uplink data ready for transmission, and the second uplink transmission is one or more uplink data being transmitted.

Optionally, the uplink transmission types of the first uplink transmission or the second uplink transmission include: physical random access channel (Physical Random Access Channel, PRACH) transmission, SR transmission, acknowledgement/non-Acknowledgement (ACK/NACK) transmission, channel quality indication (Channel Quality Indication, CQI) transmission, channel sounding reference signal (Sounding Reference Signal, SRs) transmission, PUSCH transmission, and the like.

Alternatively, the first uplink transmission and the second uplink transmission may be uplink transmissions on the same carrier or different carriers or different Controlled Cell Groups (CG), and the CG includes a primary evolved base station (Master Evolved Node B, meNB) Controlled cell Group (MeNB Controlled Group, MCG) and a secondary evolved base station (Secondary Evolved Node B, seNB) Controlled cell Group (SeNB Controlled Group, SCG).

When the terminal determines that there is no second uplink transmission overlapping with the first uplink transmission, it goes to step 304; when the terminal determines that there is a second uplink transmission overlapping the first uplink transmission, it goes to step 305.

In step 304, when LBT is successful on the unlicensed band and there is no second uplink transmission overlapping with the first uplink transmission, the terminal transmits the first uplink transmission on the unlicensed band.

In step 305, when LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, the terminal preferentially transmits at least one of the first uplink transmission and the second uplink transmission.

In an alternative embodiment, when LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, the terminal simultaneously transmits the first uplink transmission and the second uplink transmission on the unlicensed band. The simultaneous transmission conditions include: the first uplink transmission and the second uplink transmission conform to a predefined transmission type; and/or the transmitting power of the terminal meets the power required by the simultaneous transmission of the first uplink transmission and the second uplink transmission.

Optionally, when the transmission types of the first uplink transmission and the second uplink transmission conform to the predefined transmission types, the first uplink transmission and the second uplink transmission overlap, but the terminal may transmit the first uplink transmission and the second uplink transmission at the same time.

For example, the predefined transmission types include SR transmission and UpLink-Shared Channel (UL-SCH) transmission, or ACK/NACK transmission and UL-SCH transmission.

Illustratively, when the first UpLink transmission is an SR transmission and the second UpLink transmission is an UpLink-Shared Channel (UL-SCH) transmission, the SR transmission and the UL-SCH transmission conform to predefined transmission types, so that when LBT is successful on an unlicensed band and there is an overlap between the SR transmission and the UL-SCH transmission, the terminal can transmit the SR transmission and the UL-SCH transmission at the same time.

Alternatively, when the first uplink transmission is an ACK/NACK transmission and the second uplink transmission is an UL-SCH transmission, the ACK/NACK transmission and the UL-SCH transmission conform to a predefined transmission type, so that when LBT is successful on an unlicensed band and there is overlap between the ACK/NACK transmission and the UL-SCH transmission, the terminal can simultaneously transmit the ACK/NACK transmission and the UL-SCH transmission.

Optionally, when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapping with the first uplink transmission, where the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, and the priority of the first uplink transmission is higher than that of the second uplink transmission, the terminal preferentially sends the first uplink transmission, and sends the second uplink transmission after the first uplink transmission is sent;

Or when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, wherein the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the terminal preferentially transmits the second uplink transmission, and transmits the first uplink transmission after the transmission of the second uplink transmission is completed;

or when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, and the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, the terminal prolongs LBT until the second uplink transmission is sent completely, and if LBT is successful in the process of sending the second uplink transmission, the terminal sends the first uplink transmission after the second uplink transmission is sent completely;

or when the LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, and the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, the terminal cancels the transmission of the first uplink transmission and/or the second uplink transmission.

In another alternative embodiment, when the LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is higher than the priority of the second uplink transmission, the terminal sends the first uplink transmission on the unlicensed band.

Optionally, the priorities of the first uplink transmission and the second uplink transmission are determined according to the services corresponding to the two uplink transmissions, and/or the priorities of the first uplink transmission and the second uplink transmission are defined by the communication system.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is smaller than the preset interval time, the terminal does not perform LBT after sending the first uplink transmission, and directly sends the second uplink transmission.

Optionally, when the time interval between the sending of the second uplink transmission and the sending of the first uplink transmission is greater than the preset interval time, the terminal performs LBT on the unlicensed frequency band again after finishing sending the first uplink transmission on the unlicensed frequency band. And the terminal sends the second uplink transmission when the LBT is successful.

Optionally, when the terminal sends the first uplink transmission on the unlicensed frequency band, the second uplink transmission is not yet finished, the terminal suspends the second uplink transmission, preferentially sends the first uplink transmission, and continues to send the second uplink transmission after the first uplink transmission is finished; or when the terminal sends the first uplink transmission on the unlicensed frequency band, the second uplink transmission is not started, the terminal stops sending the second uplink transmission, preferentially sends the first uplink transmission, and starts to send the second uplink transmission after the first uplink transmission is sent; or when the terminal sends the first uplink transmission on the unlicensed frequency band, the terminal cancels the second uplink transmission and sends the first uplink transmission when the second uplink transmission is not finished or the second uplink transmission is not started.

In another alternative embodiment, when the LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the terminal sends the first uplink transmission after completing sending the second uplink transmission on the unlicensed band.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is smaller than the preset interval time, the terminal does not perform LBT after sending the second uplink transmission, and directly sends the first uplink transmission.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is greater than the preset interval time, the terminal performs LBT on the unlicensed frequency band again after finishing sending the second uplink transmission on the unlicensed frequency band. And when the LBT is successful, the terminal sends the first uplink transmission on the unlicensed frequency band.

Optionally, when the LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the terminal cancels the transmission of the first uplink transmission.

In another alternative embodiment, when the LBT is successful on the unlicensed frequency band and there is a second uplink transmission overlapping with the first uplink transmission, the terminal extends the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, sends the first uplink transmission after the second uplink transmission is sent.

Optionally, the terminal prolongs the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, the terminal re-performs another LBT, where the channel evaluation duration of the another LBT is equal to the target duration. The target duration is a larger value of a transmission remaining duration of the second uplink transmission and a next channel assessment duration of the LBT, and the target duration=max (the remaining duration of the second uplink transmission, the next channel assessment duration of the LBT). The LBT next channel evaluation duration is determined by adjusting CWS according to the result of the last transmission.

Optionally, the terminal executes the corresponding operation according to the result of the another LBT, and the content of the operation is the same as that of steps 302 to 305, which is not described herein.

In summary, in the method provided in the embodiment of the present disclosure, after the LBT is successful, it is further determined whether there is a second uplink transmission overlapping with the first uplink transmission, and the terminal preferentially transmits at least one uplink transmission of the first uplink transmission and the second uplink transmission, so as to ensure accuracy of overlapping determination after the duration of the LBT, and avoid collision with the second uplink transmission due to inaccuracy of the overlapping determination result when the terminal sends the first uplink transmission.

According to the method provided by the embodiment of the disclosure, when the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, the terminal determines that LBT is successful, and when the first uplink transmission is overlapped with the second uplink transmission, the first uplink transmission and the second uplink transmission are simultaneously transmitted on an unlicensed frequency band, so that even if multiple uplink transmissions exist in the terminal, the terminal can simultaneously transmit the first uplink transmission and the second uplink transmission under certain predefined scenes, and therefore the first uplink transmission and the second uplink transmission can be timely transmitted to an opposite terminal.

According to the method provided by the embodiment of the disclosure, when the priority of the first uplink transmission is higher than that of the second uplink transmission, the terminal determines that LBT is successful, and when the first uplink transmission is overlapped with the second uplink transmission, the first uplink transmission is preferentially sent on an unlicensed frequency band, so that when multiple uplink transmissions exist in the terminal, the terminal can ensure that the first uplink transmission with higher priority is timely transmitted.

According to the method provided by the embodiment of the disclosure, when the priority of the first uplink transmission is lower than that of the second uplink transmission, the terminal determines that LBT is successful, and when the first uplink transmission is overlapped with the second uplink transmission, the second uplink transmission is preferentially transmitted on an unlicensed frequency band, and after the second uplink transmission is transmitted, the first uplink transmission is transmitted again, so that when multiple uplink transmissions exist in the terminal, the terminal can ensure that the second uplink transmission with higher priority is timely transmitted.

According to the method provided by the embodiment of the disclosure, when LBT is successful on the unlicensed frequency band and the second uplink transmission overlapped with the first uplink transmission exists, the terminal prolongs the LBT until the second uplink transmission is transmitted, if LBT is successful in the process of transmitting the second uplink transmission, the first uplink transmission is transmitted, so that when a plurality of uplink transmissions exist in the terminal, the terminal can select to prolong the LBT and continuously detect the channel state of the unlicensed frequency band, and the first uplink transmission can be timely transmitted after the second uplink transmission is ended.

In the embodiment shown in fig. 3, a method for transmitting uplink is described by a protocol stack of a wireless communication system, fig. 4 shows a flowchart of a method for transmitting uplink provided by another exemplary embodiment of the present disclosure, the method may be applied to the implementation environment shown in fig. 2, the method describes whether a first uplink and a second uplink overlap is determined by a MAC layer of a terminal, and the method includes:

in step 401, before the terminal sends the first uplink transmission on the unlicensed frequency band, the physical layer of the terminal performs LBT on the unlicensed frequency band.

Optionally, before the terminal sends the first uplink transmission on the unlicensed frequency band, it is not determined whether there is a second uplink transmission overlapping with the first uplink transmission, and the physical layer of the terminal performs LBT on the unlicensed frequency band.

When LBT is unsuccessful, go to step 402; when LBT is successful, go to step 403.

In step 402, when the LBT is unsuccessful, the physical layer of the terminal extends the LBT or resumes the LBT or cancels the present round of transmission.

When LBT is unsuccessful, the physical layer of the terminal determines that other terminals are transmitting uplink on the unlicensed frequency band. The physical layer of the terminal prolongs the LBT of the round or restarts the LBT until the first uplink transmission can be sent; or the physical layer of the terminal cancels the transmission of the round, namely the round is abandoned to send the first uplink transmission.

In step 403, the physical layer of the terminal sends a first indication to the MAC layer of the terminal when the LBT is successful.

When the LBT is successful, the physical layer of the terminal determines that no other terminal is transmitting uplink on the licensed band. The physical layer of the terminal sends a first indication to the MAC layer of the terminal. The first indication is that the physical layer for the terminal transmits LBT successful information to the MAC layer of the terminal.

In step 404, after receiving the first indication, the MAC layer of the terminal determines whether there is a second uplink transmission overlapping with the first uplink transmission.

After receiving the first instruction, the MAC layer of the terminal judges whether a second uplink transmission overlapped with the first uplink transmission exists in the terminal. The first uplink transmission and the second uplink transmission are uplink transmissions sent by the same terminal. The first uplink transmission is uplink data ready for transmission, and the second uplink transmission is one or more uplink data being transmitted. And a first indication for indicating the MAC layer of the terminal to determine whether a second uplink transmission overlapped with the first uplink transmission exists.

When the MAC layer of the terminal determines that there is no second uplink transmission overlapping with the first uplink transmission, it goes to step 405; when the MAC layer of the terminal determines that there is a second uplink transmission overlapping the first uplink transmission, it goes to step 406.

In step 405, when there is no second uplink transmission overlapping with the first uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission on the unlicensed frequency band.

When LBT is successful on the unlicensed frequency band and there is no second uplink transmission overlapped with the first uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission on the unlicensed frequency band.

In step 406, when there is a second uplink transmission overlapping with the first uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission.

In an alternative embodiment, when LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission and the second uplink transmission simultaneously on the unlicensed band. The simultaneous transmission conditions include: the first uplink transmission and the second uplink transmission conform to a predefined transmission type; and/or the transmitting power of the terminal meets the power required by the simultaneous transmission of the first uplink transmission and the second uplink transmission.

Optionally, when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapping with the first uplink transmission, where the first uplink transmission and the second uplink transmission do not meet a simultaneous transmission condition, and the priority of the first uplink transmission is higher than that of the second uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to preferentially transmit the first uplink transmission, and after the transmission of the first uplink transmission is completed, the second uplink transmission is transmitted;

or when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, wherein the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to preferentially transmit the second uplink transmission, and the first uplink transmission is transmitted after the transmission of the second uplink transmission is completed;

Or when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, and the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, the MAC layer of the terminal instructs the physical layer of the terminal to prolong LBT until the second uplink transmission is sent completely, and if LBT is successful in the process of sending the second uplink transmission, the first uplink transmission is sent after the second uplink transmission is sent completely;

or when the LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapped with the first uplink transmission, and the first uplink transmission and the second uplink transmission do not meet the simultaneous transmission condition, the MAC layer of the terminal instructs the physical layer of the terminal to cancel transmission of the first uplink transmission and/or the second uplink transmission.

In another alternative embodiment, when the LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is higher than the priority of the second uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission on the unlicensed band.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is greater than the preset interval time, the MAC layer of the terminal instructs the physical layer of the terminal to perform LBT on the unlicensed frequency band again after the physical layer of the terminal finishes sending the first uplink transmission on the unlicensed frequency band. And the terminal sends the second uplink transmission when the LBT is successful.

Optionally, when the physical layer of the terminal sends the first uplink transmission on the unlicensed frequency band, the second uplink transmission is not yet finished, and the MAC layer of the terminal instructs the physical layer of the terminal to stop the second uplink transmission, send the first uplink transmission preferentially, and send the second uplink transmission continuously after the first uplink transmission is finished; or when the physical layer of the terminal sends the first uplink transmission on the unlicensed frequency band, the second uplink transmission is not started to be transmitted yet, the MAC layer of the terminal instructs the physical layer of the terminal to stop sending the second uplink transmission, the first uplink transmission is sent preferentially, and the second uplink transmission is started to be sent after the first uplink transmission is sent completely; or when the physical layer of the terminal sends the first uplink transmission on the unlicensed frequency band, the second uplink transmission is not finished or is not started to be transmitted, and the MAC layer of the terminal instructs the physical layer of the terminal to cancel sending the second uplink transmission and send the first uplink transmission.

In another alternative embodiment, when the LBT is successful on the unlicensed band and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to send the first uplink transmission after the physical layer of the terminal finishes sending the second uplink transmission on the unlicensed band.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is smaller than the preset interval time, the MAC layer of the terminal indicates the physical layer of the terminal to directly send the first uplink transmission without LBT after the second uplink transmission is sent.

Optionally, when the time interval between sending the second uplink transmission and sending the first uplink transmission is greater than the preset interval time, the MAC layer of the terminal instructs the physical layer of the terminal to perform LBT on the unlicensed frequency band again after the physical layer of the terminal finishes sending the second uplink transmission on the unlicensed frequency band. And when the LBT is successful, the terminal sends the first uplink transmission on the unlicensed frequency band.

Optionally, when LBT is successful on the unlicensed frequency band, and there is a second uplink transmission overlapping with the first uplink transmission, and the priority of the first uplink transmission is lower than that of the second uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to cancel sending the first uplink transmission.

In another alternative embodiment, when the LBT is successful on the unlicensed frequency band and there is a second uplink transmission overlapping with the first uplink transmission, the MAC layer of the terminal instructs the physical layer of the terminal to extend the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, sends the first uplink transmission after the second uplink transmission is sent.

Optionally, the MAC layer of the terminal instructs the physical layer of the terminal to extend the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, another LBT is performed again, where the channel evaluation duration of the other LBT is equal to the target duration. The target duration is a larger value of a transmission remaining duration of the second uplink transmission and a next channel assessment duration of the LBT, and the target duration=max (the remaining duration of the second uplink transmission, the next channel assessment duration of the LBT). The LBT next channel evaluation duration is determined by adjusting CWS according to the result of the last transmission.

Optionally, the terminal executes the corresponding operation according to the result of the another LBT, and the content of the operation is the same as that of the steps 402 to 406, which is not described herein.

In summary, according to the method provided by the embodiment of the present disclosure, after the LBT is successful, the physical layer of the terminal sends a first indication to the MAC layer of the terminal, after receiving the first indication, the MAC layer of the terminal determines whether there is a second uplink transmission overlapping with the first uplink transmission, and the MAC layer of the terminal instructs the physical layer of the terminal to execute a corresponding operation.

In the embodiment shown in fig. 3, a method for transmitting uplink is described by using a protocol stack of a wireless communication system, fig. 5 shows a flowchart of a method for transmitting uplink provided by another exemplary embodiment of the present disclosure, the method may be applied to the implementation environment shown in fig. 2, the method describes whether a first uplink and a second uplink overlap is determined by a physical layer of a terminal, and the method includes:

in step 501, before the terminal sends the first uplink transmission on the unlicensed frequency band, the physical layer of the terminal performs LBT on the unlicensed frequency band.

Step 501 is the same as step 401 and will not be described in detail here.

When LBT is unsuccessful, go to step 502; when LBT is successful, go to step 503.

In step 502, when the LBT is unsuccessful, the physical layer of the terminal extends the LBT or resumes the LBT or cancels the present round of transmission.

Step 502 is the same as step 402 and will not be described in detail here.

In step 503, the physical layer of the terminal determines whether there is a second uplink transmission overlapping with the first uplink transmission when the LBT is successful.

When the LBT is successful, the physical layer of the terminal determines that no other terminal is transmitting uplink on the licensed band. The physical layer of the terminal determines whether there is a second uplink transmission overlapping the first uplink transmission within the terminal. The first uplink transmission and the second uplink transmission are uplink transmissions sent by the same terminal. The first uplink transmission is uplink data ready for transmission, and the second uplink transmission is one or more uplink data being transmitted.

When the physical layer of the terminal determines that there is no second uplink transmission overlapping with the first uplink transmission, the step goes to step 504; when the physical layer of the terminal determines that there is a second uplink transmission overlapping with the first uplink transmission, it goes to step 505.

In step 504, the physical layer of the terminal sends the first uplink transmission on the unlicensed frequency band when there is no second uplink transmission overlapping the first uplink transmission.

And when LBT is successful on the unlicensed frequency band and there is no second uplink transmission overlapped with the first uplink transmission, the physical layer of the terminal directly sends the first uplink transmission on the unlicensed frequency band.

In step 505, when the physical layer of the terminal determines that there is a second uplink transmission overlapping the first uplink transmission, the physical layer of the terminal sends a second indication to the MAC layer of the terminal.

When the physical layer of the terminal determines that there is a second uplink transmission overlapping with the first uplink transmission, the physical layer of the terminal determines that the priority of the first uplink transmission and the second uplink transmission needs to be determined, and determines the transmission order according to the priority. The physical layer of the terminal sends a second indication to the MAC layer of the terminal. And a second instruction, wherein the physical layer of the terminal sends information of a second uplink transmission overlapped with the first uplink transmission to the MAC layer of the terminal.

In step 506, after receiving the second instruction, the MAC layer of the terminal instructs the physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when there is a second uplink transmission overlapping with the first uplink transmission.

After receiving the second indication, when the LBT is successful on the unlicensed frequency band and there is a second uplink transmission overlapping the first uplink transmission, the MAC layer of the terminal indicates that the content of the physical layer transmission sequence of the terminal is the same as the content of step 406 according to the priorities of the first uplink transmission and the second uplink transmission, which is not described herein. And a second indication, configured to instruct the MAC layer of the terminal to determine priorities of the first uplink transmission and the second uplink transmission.

In summary, in the method provided in the embodiments of the present disclosure, after LBT is successful, the physical layer of the terminal determines whether there is a second uplink transmission overlapping with the first uplink transmission, and when there is a second uplink transmission overlapping with the first uplink transmission, sends a second indication to the MAC layer of the terminal, and after receiving the second indication, the MAC layer of the terminal instructs the physical layer of the terminal to perform a corresponding operation according to priorities of the two uplink transmissions.

In the embodiment shown in fig. 3, fig. 6 shows a flowchart of a method for transmitting uplink transmission according to another exemplary embodiment of the present disclosure, where the method may be applied to the implementation environment shown in fig. 2, and the method illustrates that a terminal determines whether a measurement interval overlapping with a first uplink transmission exists, and includes:

in step 601, before the terminal sends the first uplink transmission on the unlicensed frequency band, LBT is performed on the unlicensed frequency band.

Step 601 is the same as step 301 and will not be described again here.

When LBT is unsuccessful, go to step 602; when LBT is successful, go to step 603.

In step 602, when the LBT is unsuccessful, the terminal lengthens the LBT or resumes the LBT or cancels the present round of transmission.

Step 602 is the same as step 302 and will not be described in detail here.

In step 603, when the LBT is successful, the terminal determines whether there is a measurement interval overlapping with the first uplink transmission.

When the LBT is successful, the terminal determines that no other terminal is transmitting uplink on the authorized frequency band. The terminal needs to determine whether there is a measurement gap overlapping with the first uplink transmission inside the terminal. The measurement interval is used to measure the quality of the channel, such as the frequency, channel capacity, etc. Wherein the first uplink transmission is uplink data ready for transmission.

When the terminal determines that there is no measurement interval overlapping with the first uplink transmission, it goes to step 604; when the terminal determines that there is a measurement interval overlapping with the first uplink transmission, it goes to step 605.

In step 604, when LBT is successful on the unlicensed band and there is no measurement interval overlapping with the first uplink transmission, the terminal transmits the first uplink transmission on the unlicensed band.

In step 605, when LBT is successful on the unlicensed band, and there is a measurement interval overlapping with the first uplink transmission, and the type of the first uplink transmission is a predetermined type, the terminal transmits the first uplink transmission on the unlicensed band.

Optionally, the predetermined type includes that the priority of the traffic corresponding to the first uplink transmission is higher than the priority of the measurement interval, or the predetermined type includes that the priority of the communication system fixed to the first uplink transmission is higher than the priority of the measurement interval. Therefore, when the LBT is successful on the unlicensed band, and there is a measurement interval overlapping with the first uplink transmission, and the type of the first uplink transmission is a predetermined type, the terminal transmits the first uplink transmission on the unlicensed band.

For example, when the first uplink transmission belongs to a low latency high reliability connection (Ultra-Reliable and Low Latency Communications, URLLC), the terminal sends the first uplink transmission on the unlicensed band when LBT is successful on the unlicensed band and there is a measurement interval overlapping the first uplink transmission.

Optionally, when the LBT is successful on the unlicensed band, and there is a measurement interval overlapping with the first uplink transmission, and the type of the first uplink transmission is not a predetermined type, the terminal cancels the transmission of the first uplink transmission; or when the LBT is successful on the unlicensed frequency band, and a measurement interval overlapped with the first uplink transmission exists, and the type of the first uplink transmission is not a preset type, the terminal prolongs the LBT until the measurement interval is ended, and if the LBT is successful in the process of the measurement interval, the terminal sends the first uplink transmission after the measurement interval is ended.

Optionally, the terminal prolongs the LBT until the measurement interval is over, and if the LBT fails during the measurement interval, the terminal re-performs another LBT, where the channel evaluation duration of the another LBT is equal to the target duration. The target duration is the larger value of the remaining duration of the measurement interval and the next round of channel estimation duration of the LBT, and the target duration=max (the remaining duration of the measurement interval, the next round of channel estimation duration of the LBT). The LBT next channel evaluation duration is determined by adjusting CWS according to the result of the last transmission.

Optionally, the terminal performs a corresponding operation according to the result of the another LBT performed again, and the content of the operation is the same as that of steps 602 to 605, which is not described herein.

In summary, in the method provided in the embodiment of the present disclosure, after the LBT is successful, it is further determined whether there is a measurement interval overlapping with the first uplink transmission, and when the type of the first uplink transmission is a predetermined type, the terminal sends the first uplink transmission on the unlicensed frequency band, so as to ensure accuracy of overlapping determination after the duration of the LBT, and avoid collision with the second uplink transmission caused by inaccuracy of the overlapping determination result when the terminal sends the first uplink transmission.

In the embodiment shown in fig. 3, fig. 7 shows a flowchart of a method for sending uplink transmission according to another exemplary embodiment of the present disclosure, where the method may be applied to the implementation environment shown in fig. 2, and the method illustrates that a terminal performs a determination of overlapping a first uplink transmission before performing LBT, and the method includes:

in step 701, before the terminal sends the first uplink transmission on the unlicensed frequency band, it is determined whether there is a second uplink transmission or a measurement interval overlapping with the first uplink transmission.

In step 702, when it is determined that there is no second uplink transmission or measurement interval overlapping with the first uplink transmission, the terminal performs LBT on the unlicensed frequency band.

Before the terminal sends the first uplink transmission on the unlicensed frequency band, the terminal performs one-time overlapping judgment. Here, the design in the related art can be compatible.

And when the second uplink transmission or the measurement interval overlapped with the first uplink transmission does not exist, the terminal performs LBT on the unlicensed frequency band.

The LBT refers to that before the terminal sends the first uplink transmission, the terminal monitors an unlicensed band to be sent, and when the unlicensed band is monitored to be idle, the terminal is informed that the unlicensed band is idle, and the terminal can send the first uplink transmission.

Steps 703 to 706 are the same as steps 302 to 305, and will not be described here again.

In summary, according to the method provided by the embodiment of the present disclosure, the terminal performs the first overlap determination before LBT, and performs the second overlap determination after LBT. On one hand, the existing design can be compatible by performing one-time overlapping judgment before LBT; on the other hand, the overlapping judgment is carried out once again after the LBT, so that the accuracy of the overlapping judgment can be ensured, and the terminal can not cause transmission failure due to the overlapping problem in the terminal when transmitting the first uplink transmission when the LBT is successful.

In the embodiment shown in fig. 3, fig. 8 shows a flowchart of a method for sending uplink transmission according to another exemplary embodiment of the present disclosure, where the method may be applied to the implementation environment shown in fig. 2, and the method illustrates that a terminal performs a determination of overlapping a first uplink transmission before performing LBT, and the method includes:

step 801, before the terminal sends the first uplink transmission on the unlicensed frequency band, it is determined whether there is a second uplink transmission overlapping with the first uplink transmission, and the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition.

Before the terminal sends the first uplink transmission on the unlicensed frequency band, it is determined whether there is a second uplink transmission overlapping the first uplink transmission.

And when the second uplink transmission overlapped with the first uplink transmission exists, the terminal continuously judges whether the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition.

Step 802, when it is determined that there is a second uplink transmission overlapping with the first uplink transmission, and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, LBT is performed on the unlicensed band.

Before the terminal sends the first uplink transmission on the unlicensed frequency band, the terminal performs one-time overlapping judgment. And when the second uplink transmission overlapped with the first uplink transmission exists, and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, the terminal performs LBT on the unlicensed frequency band.

Steps 803 to 806 are the same as steps 302 to 305, and will not be described here again.

In summary, according to the method provided by the embodiment of the present disclosure, the terminal performs the first overlap determination before LBT, and performs the second overlap determination after LBT, so that when LBT is successful, the terminal does not cause transmission failure due to the overlapping problem inside the terminal when transmitting the first uplink transmission.

At least one of fig. 3 and 6 described above may be freely combined with any one of fig. 7 and 8 to form a new embodiment, at least one of fig. 4 and 6 described above may be freely combined with any one of fig. 7 and 8 to form a new embodiment, and at least one of fig. 5 and 6 described above may be freely combined with any one of fig. 7 and 8 to form a new embodiment. For the new embodiments formed by free combination, no further description is given here.

The following are device embodiments of the present disclosure that may be used to perform method embodiments of the present disclosure. For details not disclosed in the embodiments of the apparatus of the present disclosure, please refer to the embodiments of the method of the present disclosure.

Fig. 9 shows a schematic structural diagram of a transmitting device for uplink transmission according to an exemplary embodiment of the present disclosure, where the device includes:

the sending module 910 is configured to send the first uplink transmission on the unlicensed frequency band when LBT is successful on the unlicensed frequency band and there is no second uplink transmission or measurement interval overlapping the first uplink transmission.

The sending module 910 is configured to, when LBT is successful on the unlicensed frequency band and there is a second uplink transmission overlapping with the first uplink transmission, preferentially transmit at least one of the first uplink transmission and the second uplink transmission.

In another alternative embodiment, the sending module 910 is configured to send the first uplink transmission and the second uplink transmission simultaneously on the unlicensed frequency band when the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition.

In another alternative embodiment, the sending module 910 is configured to send the first uplink transmission on the unlicensed frequency band when the priority of the first uplink transmission is higher than the priority of the second uplink transmission.

In another alternative embodiment, the sending module 910 is configured to send the first uplink transmission after sending the second uplink transmission on the unlicensed frequency band is completed when the priority of the first uplink transmission is lower than the priority of the second uplink transmission.

Optionally, the sending module 910 is configured to perform LBT on the unlicensed frequency band again after the second uplink transmission is sent on the unlicensed frequency band; a transmitting module 910 is configured to transmit the first uplink transmission on the unlicensed frequency band when the LBT is successful.

In another alternative embodiment, the sending module 910 is configured to extend the LBT until the second uplink transmission is sent, and if the LBT is successful in sending the second uplink transmission, send the first uplink transmission.

Optionally, the sending module 910 is configured to extend the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, re-perform another LBT, where the channel evaluation duration of the another LBT is equal to the target duration; the target duration is a larger value of the transmission remaining duration of the second uplink transmission and the channel evaluation duration of the next round of LBT.

In another alternative embodiment, the sending module 910 is configured to send the first uplink transmission on the unlicensed frequency band when the LBT is successful on the unlicensed frequency band, and there is a measurement interval overlapping with the first uplink transmission, and the type of the first uplink transmission is a predetermined type.

Optionally, the sending module 910 is configured to perform LBT on the unlicensed frequency band before sending the first uplink transmission on the unlicensed frequency band; a determining module 920 is configured to determine if there is a second uplink transmission or measurement interval overlapping the first uplink transmission when the LBT is successful.

Optionally, the sending module 910 is configured to directly LBT the unlicensed frequency band without determining whether there is a second uplink transmission or a measurement interval overlapping the first uplink transmission; or, the sending module 910 is configured to perform LBT on the unlicensed frequency band when it is determined that there is no second uplink transmission or measurement interval overlapping the first uplink transmission; or, the sending module 910 is configured to perform LBT on the unlicensed frequency band when it is determined that there is a second uplink transmission overlapping the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition.

In another alternative embodiment, the transmitting module 910 is configured to perform LBT on an unlicensed band;

a transmitting module 910 configured to transmit a first indication to the MAC layer of the terminal when the LBT is successful;

a determining module 920 configured to determine, after receiving the first indication, whether there is a second uplink transmission or a measurement interval overlapping the first uplink transmission;

a sending module 910 configured to instruct the physical layer of the terminal to send the first uplink transmission on the unlicensed frequency band when there is no second uplink transmission or measurement interval overlapping the first uplink transmission.

the sending module 910 is configured to instruct the physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when there is a second uplink transmission overlapping with the first uplink transmission.

A determining module 920 configured to determine whether there is a second uplink transmission or measurement interval overlapping the first uplink transmission when LBT is successful on the unlicensed frequency band;

the sending module 910 is configured to send the first uplink transmission on the unlicensed frequency band when there is no second uplink transmission or measurement interval overlapping the first uplink transmission.

A determining module 920 configured to determine if there is a second uplink transmission or measurement interval overlapping the first uplink transmission when the LBT is successful;

a transmitting module 910 configured to transmit a second indication to the MAC layer of the terminal when the physical layer of the terminal determines that there is a second uplink transmission overlapping the first uplink transmission;

the sending module 910 is configured to instruct the physical layer of the terminal to preferentially transmit at least one uplink transmission of the first uplink transmission and the second uplink transmission when there is a second uplink transmission overlapping with the first uplink transmission after receiving the second instruction.

It should be noted that, when the apparatus provided in the foregoing embodiment implements the sending function of the uplink transmission, only the division of the foregoing functional modules is used as an example, in practical application, the foregoing functional allocation may be implemented by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to implement all or part of the functions described above.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

Referring to fig. 10, a schematic structural diagram of a terminal according to an exemplary embodiment of the present disclosure is shown, where the terminal includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 via a bus 105.

The memory 104 may be used for storing at least one instruction, and the processor 101 may be configured to execute the at least one instruction to implement the steps performed by the terminal in the above-described method embodiments.

Further, the memory 104 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium, which is a non-volatile computer readable storage medium, and in which a computer program is stored, the stored computer program, when executed by a processing component, is capable of implementing the uplink transmission method provided in the above embodiment of the disclosure.

The disclosed embodiments also provide a computer program product having instructions stored therein that, when executed on a computer, enable the computer to perform the method of transmitting uplink transmissions provided by the disclosed embodiments.

The embodiment of the disclosure also provides a chip, which comprises a programmable logic circuit and/or program instructions and can execute the uplink transmission sending method provided by the embodiment of the disclosure when the chip runs.

It should be understood that references herein to "a plurality" are to two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for transmitting uplink transmission, the method comprising:

when LBT is successful on an unlicensed frequency band and there is no second uplink transmission overlapped with the first uplink transmission, the terminal sends the first uplink transmission on the unlicensed frequency band;

when LBT is successful on an unlicensed frequency band and the second uplink transmission overlapped with the first uplink transmission exists on the unlicensed frequency band, the terminal simultaneously transmits the first uplink transmission and the second uplink transmission on the unlicensed frequency band when the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition;

Wherein the first uplink transmission is uplink data to be transmitted, and the second uplink transmission is one or more uplink data being transmitted; the simultaneous transmission condition includes: the transmitting power of the terminal meets the power required by the simultaneous transmission of the first uplink transmission and the second uplink transmission.

2. The method according to claim 1, wherein the method further comprises:

and when the priority of the first uplink transmission is higher than that of the second uplink transmission, the terminal sends the first uplink transmission on the unlicensed frequency band.

3. The method according to claim 1, wherein the method further comprises:

and when the priority of the first uplink transmission is lower than that of the second uplink transmission, the terminal sends the first uplink transmission after finishing sending the second uplink transmission on the unlicensed frequency band.

4. The method of claim 3, wherein the terminal, after completing sending the second uplink transmission on the unlicensed frequency band, sends the first uplink transmission, comprising:

after the terminal finishes sending the second uplink transmission on the unlicensed frequency band, performing LBT on the unlicensed frequency band again;

5. The method according to claim 1, wherein the method further comprises:

and the terminal prolongs the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, the terminal sends the first uplink transmission.

6. The method of claim 5, wherein the method further comprises:

the terminal prolongs the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, another LBT is carried out again, and the channel evaluation duration of the another LBT is equal to the target duration;

the target duration is a larger value of a transmission remaining duration of the second uplink transmission and a channel evaluation duration of a next round of LBT.

7. The method according to claim 1, wherein the method further comprises:

and when LBT is successful on the unlicensed frequency band, a measurement interval overlapped with the first uplink transmission exists, and the type of the first uplink transmission is a preset type, the terminal sends the first uplink transmission on the unlicensed frequency band.

8. The method according to any one of claims 1 to 7, further comprising:

before the terminal sends the first uplink transmission on the unlicensed frequency band, the terminal performs the LBT on the unlicensed frequency band;

when the LBT is successful, the terminal determines whether there is the second uplink transmission or measurement interval overlapping the first uplink transmission.

9. The method of claim 8, wherein said performing said LBT on said unlicensed band comprises:

determining whether the second uplink transmission overlapped with the first uplink transmission or the measurement interval exists or not, and directly carrying out LBT on the unlicensed frequency band;

or alternatively, the first and second heat exchangers may be,

when the second uplink transmission overlapped with the first uplink transmission or the measurement interval does not exist, LBT is carried out on the unlicensed frequency band;

or alternatively, the first and second heat exchangers may be,

and when the second uplink transmission overlapped with the first uplink transmission exists and the first uplink transmission and the second uplink transmission meet the simultaneous transmission condition, performing LBT on the unlicensed frequency band.

10. The method of claim 8, wherein said LBT of said unlicensed band comprises:

The physical layer of the terminal performs LBT on the unlicensed frequency band;

11. The method of claim 8, wherein said LBT of said unlicensed band comprises:

the determining, by the terminal, whether the second uplink transmission overlapping with the first uplink transmission or the measurement interval exists when the LBT is successful includes:

the method further comprises the steps of:

12. The method of claim 8, wherein said LBT of said unlicensed band comprises:

when LBT is successful on the unlicensed frequency band, the physical layer of the terminal determines whether the second uplink transmission or the measurement interval overlapped with the first uplink transmission exists;

13. The method of claim 8, wherein said LBT of said unlicensed band comprises:

the method further comprises the steps of:

14. A transmitting apparatus for uplink transmission, the apparatus comprising:

a transmitting module configured to transmit a first uplink transmission on an unlicensed frequency band when LBT is successful on the unlicensed frequency band and there is no second uplink transmission overlapping the first uplink transmission;

the sending module is configured to send the first uplink transmission and the second uplink transmission simultaneously on the unlicensed frequency band when the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition when LBT is successful on the unlicensed frequency band and the second uplink transmission overlapped with the first uplink transmission exists; wherein the first uplink transmission is uplink data to be transmitted, and the second uplink transmission is one or more uplink data being transmitted; the simultaneous transmission condition includes: the transmitting power of the terminal meets the power required by the simultaneous transmission of the first uplink transmission and the second uplink transmission.

15. The apparatus of claim 14, wherein the device comprises a plurality of sensors,

the sending module is configured to send the first uplink transmission on the unlicensed frequency band when the priority of the first uplink transmission is higher than the priority of the second uplink transmission.

16. The apparatus of claim 14, wherein the device comprises a plurality of sensors,

the sending module is configured to send the first uplink transmission after the second uplink transmission is sent on the unlicensed frequency band when the priority of the first uplink transmission is lower than the priority of the second uplink transmission.

17. The apparatus of claim 16, wherein the device comprises a plurality of sensors,

the sending module is configured to perform LBT on the unlicensed frequency band again after the second uplink transmission is sent on the unlicensed frequency band;

the sending module is configured to send the first uplink transmission on the unlicensed frequency band when the LBT is successful.

18. The apparatus of claim 14, wherein the device comprises a plurality of sensors,

the sending module is configured to extend the LBT until the second uplink transmission is sent, and if the LBT is successful in the process of sending the second uplink transmission, send the first uplink transmission.

19. The apparatus of claim 18, wherein the apparatus further comprises:

the sending module is configured to extend the LBT until the second uplink transmission is sent, and if the LBT fails in the process of sending the second uplink transmission, re-perform another LBT, where the channel evaluation duration of the another LBT is equal to the target duration;

20. The apparatus of claim 14, wherein the apparatus further comprises:

the sending module is configured to send the first uplink transmission on the unlicensed frequency band when LBT is successful on the unlicensed frequency band, a measurement interval overlapping with the first uplink transmission exists, and the type of the first uplink transmission is a predetermined type.

21. The apparatus according to any one of claims 14 to 20, further comprising:

the transmitting module is configured to perform the LBT on the unlicensed frequency band before the first uplink transmission is transmitted on the unlicensed frequency band;

a determining module configured to determine whether there is the second uplink transmission or measurement interval overlapping the first uplink transmission when the LBT is successful.

22. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

the sending module is configured to directly perform LBT on the unlicensed frequency band without determining whether the second uplink transmission or the measurement interval overlapped with the first uplink transmission exists;

Or alternatively, the first and second heat exchangers may be,

the sending module is configured to perform LBT on the unlicensed frequency band when it is determined that the second uplink transmission overlapping the first uplink transmission or the measurement interval does not exist;

or alternatively, the first and second heat exchangers may be,

the sending module is configured to perform LBT on the unlicensed frequency band when it is determined that the second uplink transmission overlapping with the first uplink transmission exists and the first uplink transmission and the second uplink transmission meet a simultaneous transmission condition.

23. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

the sending module is configured to perform LBT on the unlicensed frequency band;

24. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

25. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

26. The apparatus of claim 21, wherein the device comprises a plurality of sensors,

27. A terminal, the terminal comprising:

a processor;

a transceiver coupled to the processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to implement the method for transmitting uplink transmissions according to any of the preceding claims 1 to 13.

28. A computer storage medium comprising programmable logic circuits and/or program instructions which, when executed by a computer, implement the method of transmitting uplink according to any one of claims 1 to 13.