WO2017050126A1

WO2017050126A1 - Data transmission method, and method and device for sending indication information

Info

Publication number: WO2017050126A1
Application number: PCT/CN2016/098322
Authority: WO
Inventors: 李新彩; 苟伟; 毕峰; 彭佛才; 杨玲
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-21
Filing date: 2016-09-07
Publication date: 2017-03-30
Also published as: CN106559906B; CN106559906A

Abstract

Embodiments of the present invention provide a data transmission method, and a method and device for sending indication information. The data transmission method comprises: determining a listen before talk (LBT) mechanism and LBT parameters, the LBT mechanism comprising a way adopted for performing LBT, and the LBT parameters comprising parameters adopted when the LBT is performed; performing resource contention on an unlicensed carrier according to the determined LBT mechanism and the LBT parameters; and transmitting data on resources obtained by means of contention.

Description

Data transmission method, method and device for transmitting indication information

Technical field

Embodiments of the present invention relate to, but are not limited to, the field of communications, and in particular, to a data transmission method, a method and a device for transmitting indication information.

Background technique

In the evolution of the Long Term Evolution (LTE) system, the LTE Rel-13 version began to be researched in September 2014. One of the important contents is that the LTE system works with unlicensed carriers. This technology will enable LTE systems to use existing unlicensed carriers, greatly increasing the potential spectrum resources of LTE systems, enabling LTE systems to achieve lower spectrum costs.

However, LTE will face many problems when using unlicensed carriers. First, in some countries and regions, there are corresponding control policies for the use of unlicensed spectrum. For example, for listen to talk (listen before talk, also referred to as LBT, also called clean channel assessment), two types are defined, one is Frame-based Equipment (FBE), and the other is It is a load-based equipment (LBE). For the FBE mode, the location of the LBT is fixed every time the transmission node is located, and only the initial LBT needs to be performed once, so the timing is easy, and the transmission node of the same carrier can achieve the same frequency multiplexing through deployment. Moreover, the duration of each transmission is also fixed, and there is no random backoff. For the LBE approach, the LBE process includes an initial LBT (initial LBT) process and an extended LBT (Extended LBT) process. There are two LBE processes. Mode A: Initial LBT process: Before transmission, the device needs to perform LBT. According to the channel evaluation result, it is judged whether the channel is idle. If the channel evaluation result indicates that the channel is idle, the data is sent immediately. Otherwise, the device cannot send. Data, and perform extended clean channel estimation, extended clean channel evaluation for q observation time slots. The observation time slot may be a non-occupied idle time slot or a busy time slot, and the busy time slot is all time between two non-occupied idle time slots. The initial value of the q is 16. When the N1 non-occupied idle time slots are not detected in the current extended clean channel evaluation, the value of q is doubled. Once the q value reaches 1024, the q value of the next extended clean channel estimate is reset to 16; N1 is randomly selected in [0, q-1]. Method B: Initial LBT process: the device needs to be transmitted before transmission Perform LBT, judge whether the channel is idle according to the channel evaluation result, if the channel evaluation result indicates that the channel is empty, immediately send data; otherwise, the device cannot send data, and perform extended clean channel evaluation: generate random number N2, N2 value is a counter , the value range is [0, q-1], and then LBT evaluation is performed to determine whether the channel is occupied. If it is occupied, the value of N2 is unchanged, and LBT detection is continued. If the channel is not occupied, the value of N2 is decreased by 1, It is judged whether the N2 value is reduced to 0. If it is reduced to 0, the data is transmitted. Otherwise, the LBT detection is continued. That is, the device performs N2 times of LBT detection. If the detection channel is empty, the N2 value is decremented, otherwise the N2 value is unchanged, and data is transmitted when N2 is decremented to 0. The channel occupancy time specified for the channel occupancy time control is 13 ms. The relevant control policy also stipulates that the detection length corresponding to the LBT detection is that the clean channel evaluation length is not less than 20 us. For the unlicensed spectrum, multiple systems work in the same spectrum, such as WIreless-Fidelity (abbreviated as wifi). In the system, the LBT mechanisms used by different systems may be different, which may result in unfair coexistence between different systems. Therefore, LTE works on unlicensed spectrum, and it is crucial to solve the problem of fair coexistence with other systems and ensure the effective use of resources.

At present, LTE transmits uplink data during unlicensed operation. Most nodes need to perform LBT before scheduling data transmission. However, how the node performs LBT and how to determine corresponding related parameters, such as the backoff value N or LBT mechanism, is still inconclusive. In addition, in order to improve the probability that the uplink can be successfully transmitted each time the uplink is scheduled, and reduce the uplink scheduling grant UL grant waste and the data transmission delay caused by the non-contention success of the node, the probability of each LBT success of the uplink node needs to be improved, but the correlation is adopted. In the solution in the technology, the probability of improving the success of the node LBT cannot be achieved. Therefore, in the related art, there is a problem that the probability that the node successfully competes for resources on the unlicensed carrier is low.

For the above problems, there is currently no specific solution.

Summary of the invention

The embodiment of the invention provides a data transmission method, a method and a device for transmitting indication information, so as to at least solve the problem that a probability that a node existing in the related art successfully competes for resources on an unlicensed carrier is low.

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

According to an aspect of an embodiment of the present invention, a data transmission method is provided, including:

Determining a clean channel assessment (LBT) mechanism and an LBT parameter, wherein the LBT mechanism includes a manner in which the LBT is performed, the LBT parameter including a parameter used when performing the LBT;

Performing resource competition on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter;

Data transmission is performed on resources obtained from competition.

Optionally, determining the LBT mechanism and the LBT parameter includes at least one of the following:

Determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a priority of the data to be transmitted and an LBT mechanism and an LBT parameter;

Determining the LBT mechanism and/or the LBT parameter according to a preset correspondence relationship between a quality of service (Qos) level of the data to be transmitted and an LBT mechanism and an LBT parameter;

Determining the LBT mechanism and/or the LBT parameter according to a first observed parameter of the observation window;

The LBT mechanism and/or the LBT parameters are determined based on indication information from a predetermined node.

Optionally, the method comprises at least one of the following:

When the priority of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a maximum priority in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the priority of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a minimum priority in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the QoS level of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a maximum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the QoS level of the data to be transmitted is two or more, the LBT mechanism and/or the LBT parameter are determined according to a preset correspondence between a minimum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter.

Optionally, the duration of the observation window includes at least one of the following:

When the LBT mechanism is performing LBT, the duration of the observation window is the closest to the LBT The time before the start of the previous uplink subframe of the same carrier or the adjacent carrier or the previous uplink burst burst transmission until the start of the LBT;

When the LBT mechanism is performing LBT, the duration of the observation window is other time that the node that is currently executing the LBT schedules the start time of the node in the same subframe or the data is last scheduled until the start of the LBT;

The time between two adjacent scheduling or transmission opportunities;

The time from the start of the continuous k transmissions before the current time to the time before the start of the LBT, where k≥1;

The time between the occurrence of two adjacent LBT backoff values N values;

The LBT backoff value N value is generated until the start of data transmission;

The LBT backoff value N value is generated until the counter is decremented to zero.

Optionally, the indication information sent by the predetermined node includes at least one of the following:

Display signaling for indicating the LBT mechanism and/or the LBT parameters;

New data indicating whether the data to be transmitted is a new packet or a retransmission packet indicates NDI information;

Channel status information.

Optionally, the display signaling is determined by the predetermined node according to a second observed parameter of the observation window; and/or,

The display signaling is downlink control information DCI signaling and/or radio resource control RRC signaling.

Optionally, the first observation parameter includes at least one of the following:

The number of times the channel is busy, the ratio of the number of busy channels to the total number of LBT slots, the number of slots busy on the channel, the ratio of the number of busy channels to the total number of LBT slots, the number of times the channel is idle, and the channel is idle. The ratio of the number of times to the total number of LBT slots, the number of slots in which the channel is idle, the ratio of the number of slots in which the channel is idle to the total number of LBT slots, the number of failed LBTs, and the number of successful LBTs.

Optionally, determining the LBT mechanism and/or the LBT parameter according to the first observation parameter of the observation window comprises: comparing the first observation parameter with a first predetermined threshold, wherein the first predetermined threshold is One or more thresholds; determining the LBT mechanism and/or the LBT based on the comparison result parameter.

Optionally, determining the LBT mechanism and the LBT parameter, if the indication information sent by the predetermined node is received, determining, according to the indication information, the LBT mechanism and/or the LBT parameters.

Optionally, determining the LBT mechanism and the LBT parameter includes: adjusting a format of the LBT; adjusting a size of a contention window in the LBT parameter; and adjusting a size of an LBT backoff value N in the LBT parameter, where The maximum value Nmax of the N is less than the backoff threshold.

Optionally, determining the LBT parameters includes:

The LBT backoff value N in the LBT parameter is determined to be a predetermined minimum backoff value or the contention window length in the LBT parameter is determined to be a predetermined minimum contention window length when at least one of the following conditions is met:

There is no success in continuous or cumulative M times of LBT, wherein the M is a positive integer;

Not scheduled during the preset T1 time;

The number of times the data is transmitted on the unlicensed carrier within the preset T2 time is less than a preset number of times threshold.

Optionally, the LBT mechanism includes at least one of: not performing LBT; performing LBT only once, and having no random backoff; performing LBT with random backoff, and the maximum backoff value Nmax of the random backoff is a first predetermined backoff value; performing an LBT with a random backoff, and the maximum backoff value Nmax of the random backoff is variable, and Nmax is less than a second predetermined backoff value.

Optionally, the LBT parameter includes at least one of the following: a maximum value of the contention window length, a minimum value of the contention window length, a duration of the LBT, a backoff value of the LBT, and a level of the LBT.

According to another aspect of the embodiments of the present invention, a method for transmitting indication information is provided, including:

Determining indication information, wherein the indication information is used by a transmitting node to determine a clean channel assessment LBT mechanism and an LBT parameter, wherein the LBT mechanism and the LBT parameter are used by the transmitting node to compete for resources on an unlicensed carrier, and Data transmission is performed on the competing resources, wherein the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameters include parameters used when performing LBT;

Sending the indication information to the transmission node.

Optionally, the indication information includes at least one of the following information: indicating the LBT mechanism and/or the LBT parameter, or adjusting display signaling of the LBT parameter; and indicating to schedule the transmission node to transmit The new data of the new packet or the retransmission packet indicates NDI information; channel status information.

Optionally, the display signaling is determined according to a second observation parameter of the observation window; and/or, the display signaling is downlink control information DCI signaling and/or radio resource control RRC signaling.

Optionally, the second observation parameter includes at least one of the following:

Whether information of data transmitted by the transmission node is detected in a preset time or in an observation window;

Demodulation result of demodulating data transmitted by the transmission node;

Observing, in the observation window, information of whether the other node sends the scheduling data on the uplink subframe of the same carrier or the nearest carrier of the adjacent carrier, where the other nodes are geographically located and the geographical position of the transmission node is within a preset range Node

Demodulation result of demodulating data sent by the other node;

Sounding reference signal (SRS) reception result;

Channel status information;

Reference signal received power (RSRP);

Reference Information Receive Quality (RSRQ).

Optionally, the displaying signaling is determined according to the second observation parameter of the observation window, including: comparing the second observation parameter with a second predetermined threshold, wherein the second predetermined threshold is one or more a threshold; determining the display signaling according to the comparison result.

Optionally, sending the indication information to the transmission node includes: transmitting different indication information to a transmission node scheduled to be in the same subframe; and/or sending the same indication to a transmission node whose geographical position is less than a predetermined distance information.

According to another aspect of an embodiment of the present invention, a data transmission apparatus is provided, including:

a first determining module, configured to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing the LBT;

a competition module, configured to perform resource competition on an unlicensed carrier according to the determined LBT mechanism and the LBT parameter;

The transport module is set to transmit data on competing resources.

Optionally, the first determining module includes at least one of the following:

a first determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a preset correspondence between a priority of the data to be transmitted and an LBT mechanism and an LBT parameter;

a second determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a preset correspondence between the QoS level of the data to be transmitted and the LBT mechanism and the LBT parameter;

a third determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a first observed parameter of the observation window;

And a fourth determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to the indication information from the predetermined node.

Optionally, the device comprises at least one of the following:

The first determining unit is configured to: when the priority of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a maximum priority in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The first determining unit is configured to: when the priority of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a minimum priority in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The second determining unit is configured to: when the QoS level of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a maximum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The second determining unit is configured to: when the QoS level of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a minimum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters.

The time between two adjacent scheduling or transmission opportunities;

The time between the occurrence of two adjacent LBT backoff values N values;

Optionally, the indication information sent by the predetermined node includes at least one of: display signaling for indicating the LBT mechanism and/or the LBT parameter, and indicating whether the data to be transmitted is a new packet or a retransmission packet. The new data indicates NDI information; channel status information.

Optionally, the display signaling is determined by the predetermined node according to the second observation parameter of the observation window; and/or, the display signaling is downlink control information DCI signaling and/or radio resource control RRC Signaling.

Optionally, the third determining unit includes:

Comparing the subunits, the setting is to compare the first observed parameter with a first predetermined threshold, wherein the first predetermined threshold is one or more thresholds;

Determining a subunit, configured to determine the LBT mechanism and/or the LBT parameter according to a comparison result number.

Optionally, in the first determining module, if the indication information sent by the predetermined node is received, determining the LBT mechanism and/or the LBT parameter according to the indication information.

Optionally, the first determining module includes:

a first adjusting unit, configured to adjust a format of the LBT;

a second adjusting unit, configured to adjust a size of a contention window in the LBT parameter;

The third adjusting unit adjusts the size of the LBT backoff value N in the LBT parameter, where the maximum value Nmax of the N is smaller than the backoff threshold.

Optionally, when determining the LBT parameter, the first determining module includes:

a fifth determining unit, configured to determine that the LBT backoff value N in the LBT parameter is a predetermined minimum backoff value or to determine a contention window length in the LBT parameter is a predetermined minimum competition when at least one of the following conditions is met Window length:

Not scheduled during the preset T1 time;

According to another aspect of the embodiments of the present invention, a device for transmitting indication information is provided, including:

a second determining module, configured to determine indication information, where the indication information is used by the transmitting node to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism and the LBT parameter are used by the transmitting node in an unlicensed carrier Competing on resources and conducting on competing resources Data transmission, wherein the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing LBT;

And a sending module, configured to send the indication information to the transmitting node.

Demodulation result of demodulating data transmitted by the transmission node;

Demodulation result of demodulating data sent by the other node;

Sounding reference signal SRS reception result;

Channel status information;

Reference signal received power RSRP;

Reference information reception quality RSRQ.

Optionally, the sending module includes:

a first sending unit, configured to send different indication information to a transmission node scheduled to be in the same subframe; and/or,

a second sending unit, configured to send a phase to a transmitting node whose geographical position differs by less than a predetermined distance The same indication information.

According to the embodiment of the present invention, a Clean Channel Assessment (LBT) mechanism and an LBT parameter are adopted, where the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing the LBT; The LBT mechanism and the LBT parameters compete for resources on the unlicensed carrier; data transmission is performed on the competing resources. The embodiment of the invention solves the problem that the probability that the node in the related art successfully competes for resources on the unlicensed carrier is low, thereby improving the probability that the node successfully competes for resources on the unlicensed carrier.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a flow chart of a data transmission method according to an embodiment of the present invention;

2 is a flowchart of a method for transmitting indication information according to an embodiment of the present invention;

3 is a block diagram showing the structure of a data transmission apparatus according to an embodiment of the present invention;

4 is a block diagram 1 of a first determining module 32 in a data transmission apparatus according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a third determining unit 46 in the data transmission apparatus according to an embodiment of the present invention;

FIG. 6 is a second structural block diagram of a first determining module 32 in a data transmission apparatus according to an embodiment of the present invention;

FIG. 7 is a third structural block diagram of a first determining module 32 in a data transmission apparatus according to an embodiment of the present invention;

FIG. 8 is a structural block diagram of an apparatus for transmitting indication information according to an embodiment of the present invention; FIG.

FIG. 9 is a structural block diagram of a transmitting module 84 in a transmitting apparatus for indicating information according to an embodiment of the present invention;

Figure 10 is a schematic diagram 1 of an observation window according to an embodiment of the present invention;

Figure 11 is a second schematic view of an observation window according to an embodiment of the present invention;

Figure 12 is a third schematic view of an observation window in accordance with an embodiment of the present invention.

Embodiments of the invention

The present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order.

A data transmission method is provided in this embodiment. FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, determining a clean channel assessment (LBT) mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing the LBT;

Step S104: Perform resource competition on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter.

In step S106, data transmission is performed on the competing resources.

The foregoing operation may be performed by the terminal, and the resource competition on the unlicensed carrier according to the predetermined LBT mechanism and the LBT parameter may improve the competition success rate, and the manner of determining the LBT mechanism and the LBT parameter may be multiple. For how to determine, it will be explained in the following embodiments. The foregoing embodiment solves the problem that the probability that the node existing in the related art successfully competes for resources on the unlicensed carrier is low, thereby achieving the effect of improving the probability that the node successfully competes for resources on the unlicensed carrier.

The following describes how to determine the LBT mechanism and LBT parameters. In an optional embodiment, when determining the foregoing LBT mechanism and the LBT parameter, at least one of the following manners may be adopted: determining the LBT mechanism according to a preset correspondence between the priority of the data to be transmitted and the LBT mechanism and the LBT parameter. Or the LBT parameter; determining the LBT mechanism and/or the LBT parameter according to the preset correspondence between the QoS level of the data to be transmitted and the LBT mechanism and the LBT parameter; according to the first observed parameter of the observation window Determining the LBT mechanism and/or the LBT parameters; determining the LBT mechanism and/or the LBT parameters based on the indication information from the predetermined node. Of course, the above methods for determining the LBT mechanism and the LBT parameters are only a few examples, and the LBT mechanism and the LBT parameters may be determined in other manners. In the foregoing embodiment, the manner of determining the LBT mechanism and the LBT parameter is clarified, thereby further improving the probability that the node successfully competes for resources on the unlicensed carrier.

In an optional embodiment, when the priority of the data to be transmitted is two or more, the LBT mechanism and/or the LBT are determined according to the preset correspondence between the maximum priority in the data to be transmitted and the LBT mechanism and the LBT parameter. In another optional embodiment, when the priority of the data to be transmitted is two or more, the LBT mechanism is determined according to the preset correspondence between the minimum priority of the data to be transmitted and the LBT mechanism and the LBT parameter. And the LBT parameter; in another optional embodiment, when the QoS level of the data to be transmitted is two or more, determining according to a preset correspondence between the maximum QoS level in the data to be transmitted and the LBT mechanism and the LBT parameter LBT mechanism and/or LBT parameter; in another optional embodiment, when the QoS level of the data to be transmitted is two or more, according to the minimum QoS level in the data to be transmitted and the LBT mechanism and the LBT parameter preset The correspondence determines the LBT mechanism and/or the LBT parameters.

In an optional embodiment, the duration of the foregoing observation window includes at least one of the following: when the LBT mechanism is performing LBT, the duration of the observation window is the same uplink of the same carrier or the adjacent carrier that is closest to the current LBT. The time from the start of the subframe or the previous uplink burst burst transmission to the time before the start of the LBT; when the LBT mechanism is to perform the LBT, the duration of the above observation window is other nodes scheduled in the same subframe as the node currently executing the LBT. The time from the start of the last scheduled or transmitted data to the time before the start of the LBT; the time between two adjacent scheduling or transmission opportunities; the time from the start of the consecutive k transmissions before the current time to the time before the start of the LBT Where k ≥ 1; the time between two adjacent LBT backoff values N value generation; the LBT backoff value N value is generated to the time when the data transmission starts; the LBT backoff value N value is generated until the counter is reduced to 0 time. The upper N value may be the same terminal node, or may be the nearest N value of the terminal that is from the resource competition terminal to other terminals within the subscription range.

In an optional embodiment, the indication information sent by the predetermined node includes at least one of: display signaling for indicating the LBT mechanism and/or the LBT parameter, and indicating whether the data to be transmitted is a new packet or a retransmission. New Data Indicator (NDI) information of the package; Channel status information. The foregoing predetermined node may be a base station, and the terminal may determine the LBT mechanism and the LBT parameter according to the indication information sent by the base station, so as to perform resource competition on the unlicensed carrier.

In an optional embodiment, the foregoing display signaling may be determined by the predetermined node according to the second observation parameter of the observation window, and may be obtained by the predetermined node according to the second observation parameter in the observation window; In an optional embodiment, the display signaling is downlink control information (Downlink Control Information, DCI for short) signaling and/or radio resource control (Radio Resource Control, RRC for short) signaling.

In an optional embodiment, the foregoing first observation parameter includes at least one of the following: the number of times the channel is busy, the ratio of the number of times the channel is busy to the total number of LBT slots, the number of slots in which the channel is busy, and the slot in which the channel is busy. The ratio of the number to the total number of LBT slots, the number of times the channel is idle, the ratio of the number of channels idle to the total number of LBT slots, the number of slots in which the channel is idle, the number of slots in which the channel is idle, and the total number of LBT slots. The ratio of the number, the number of LBT failures, and the number of successful LBTs.

In an optional embodiment, determining the LBT mechanism and/or the LBT parameter according to the first observed parameter of the observation window comprises: comparing the first observed parameter with a first predetermined threshold, wherein the first predetermined threshold is one or a plurality of thresholds; determining the LBT mechanism and/or the LBT parameters according to the comparison result. That is, the terminal may be based on the number of times the channel is busy in the observation window, or the number of busy channels/the total number of LBT slots, or the number of slots in which the channel is busy, or the number of slots in which the channel is busy/the total number of LBT slots, etc. The comparison results for the different thresholds determine the LBT mechanism and/or the LBT parameters. Or the terminal may determine the LBT mechanism and/or the LBT parameter according to the number or proportion of failures or successes of the LBT in the observation window. In an optional embodiment, when the terminal is scheduled for the first time, the LBT backoff value in the LBT parameter may select an intermediate N value, or the location of the terminal in the other terminal scheduled by the base station according to the previous subframe. The N value of the nearest UE is adjusted to determine the LBT backoff value, or the LBT backoff value may be determined based on the statistical empirical value.

In an optional embodiment, determining the LBT mechanism and the LBT parameter includes: determining, in the case of receiving the indication information sent by the predetermined node, the LBT mechanism and/or the LBT parameter according to the indication information. When the above indication information sent by the predetermined node is not received, the terminal itself determines or adjusts the LBT mechanism and/or the LBT parameter.

In an optional embodiment, determining the LBT mechanism and the LBT parameter may include: adjusting a format of the LBT, adjusting a size of a contention window in the LBT parameter, and adjusting a size of the LBT backoff value N in the LBT parameter, where The maximum value Nmax of the above N is less than the backoff threshold. The backoff threshold can be a predetermined or predetermined threshold.

In an optional embodiment, determining the LBT parameter includes: determining that the LBT backoff value N in the LBT parameter is a predetermined minimum backoff value or determining a contention window in the LBT parameter when at least one of the following conditions is met; The length is the predetermined minimum contention window length: the continuous or cumulative M times LBT are unsuccessful, wherein the M is a positive integer; it is not scheduled within the preset T1 time; the data is transmitted on the unlicensed carrier within the preset T2 time. The number of times is less than the preset number of times threshold. Wherein, the predetermined minimum contention window length may be a predetermined value (such as 1, 2 or other values), and the minimum back-off value may be a predetermined back-off value, such as Nmin=0 or 1 or other values. .

In an optional embodiment, the foregoing LBT mechanism includes at least one of the following: LBT is not performed; LBT is performed only once, and there is no random backoff; LBT with random backoff is performed, and the maximum backoff of the random backoff is performed. The value Nmax is a first predetermined backoff value; the LBT with random backoff is executed, and the maximum backoff value Nmax of the random backoff is variable, and Nmax is smaller than the second predetermined backoff value. Both the first predetermined backoff value and the second predetermined backoff value may be predetermined predetermined values.

In an optional embodiment, the LBT parameter includes at least one of the following: a maximum value of the contention window length, a minimum value of the contention window length, a duration of the LBT, a backoff value of the LBT, and a level of the LBT.

Optionally, when the scheduled terminal performs LBT successfully according to the LBT mechanism or the LBT parameter selected by the base station or the LBT parameter selected by the base station, the uplink data is sent in the subframe position where the scheduling is performed, and then the base station may respond according to a preset timing relationship. The location is blindly checked, or the terminal feeds back to the base station whether data transmission has been performed, and the base station receives the feedback information before receiving the data. Each subsequent LBT mechanism and LBT parameters can be dynamically or semi-statically adjusted.

In an alternative embodiment, each time the data is transmitted on the competing resources, the data transmitted is transmitted on at least one subframe.

2 is a flowchart of a method for transmitting indication information according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, determining indication information, where the indication information is used by the transmission node to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism and the LBT parameter are used by the transport node to compete for resources on the unlicensed carrier, and competed. Data transmission is performed on the resource, wherein the LBT mechanism includes a method used for performing LBT, and the LBT parameter includes parameters used when performing LBT;

Step S204, the foregoing indication information is sent to the transmission node.

The foregoing operation may be performed by the base station, and the foregoing transmission node may be a terminal. After the foregoing steps, the base station determines the LBT mechanism and the LBT parameter for the terminal, which can effectively improve the LBT success rate of the terminal, that is, improve the successful competition of the terminal to the non-authentication. The success rate of the resources on the licensed carrier is solved, thereby solving the problem that the probability that the node existing in the related art (ie, the above terminal) successfully competes for resources on the unlicensed carrier is low, thereby achieving the successful competition of the node to the unauthorized. The effect of the probability of resources on the carrier.

In an optional embodiment, the foregoing indication information may include at least one of the following information: a display signaling for indicating an LBT mechanism and/or an LBT parameter, or adjusting an LBT parameter; and indicating that the data transmitted by the scheduling transmission node is The new packet is also the new data indication (NDI) information of the retransmission packet; channel state information.

In an optional embodiment, the display signaling is determined according to the second observation parameter of the observation window; in another optional embodiment, the display signaling is downlink control information (DCI) signaling and/or Or Radio Resource Control (RRC) signaling.

In an optional embodiment, the foregoing second observation parameter may include at least one of: whether information of the data sent by the transmission node is detected in a preset time or an observation window; and the data sent by the transmission node is solved. The demodulation result of the modulation; whether the information of the scheduling data is sent by the other nodes on the uplink subframe of the same carrier or the nearest carrier of the adjacent carrier is observed in the observation window, wherein the other nodes are geographically separated from the geographical position of the transmission node. a node within a preset range; a demodulation result of demodulating the data transmitted by the other nodes; a sounding reference signal (SRS) receiving result; a channel state information; a reference signal receiving power , referred to as RSRP); Reference Signal Receiving Quality (referred to as RSRQ).

In an optional embodiment, the foregoing display signaling is determined according to the second observed parameter of the observation window. The method includes: comparing the second observed parameter with a second predetermined threshold, wherein the second predetermined threshold is one or more thresholds; and determining the display signaling according to the comparison result.

The base station may be scheduled according to the terminal (ie, the foregoing transmission node) M1 times (M1 is greater than or equal to 1) or the previous uplink subframe, whether the terminal is received or is within a preset geographical range from the terminal. The data sent by the other scheduling terminal adjusts the current LBT mechanism and/or the LBT parameter of the terminal; or, the base station may transmit the uplink data channel according to the previous M2 times (M2 is greater than or equal to 1) or the terminal in the previous uplink subframe (Physical uplink) The result of the Block Error Ratio (BLER) of the demodulation of the shared channel (PUSCH) is compared with the threshold to determine or adjust the LBT mechanism and/or the LBT parameter; or, the base station can also receive the Synchronous Relay Satellite (SRS) or measured channel state information or RSRP/RSRQ is compared with a threshold to determine or adjust the LBT mechanism and/or LBT parameters. Optionally, the base station may send a reference signaling to the UE according to the adjustment of the adjusted LBT mechanism and/or the LBT parameter, and then the UE adjusts and determines the LBT mechanism and/or the LBT parameter according to the signaling. . This signaling includes NDI information, or channel status information.

In an optional embodiment, sending the indication information to the transmission node includes: transmitting different indication information to the transmission node scheduled to be in the same subframe; and/or transmitting the same to the transmission node whose geographical position is less than a predetermined distance Instructions.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic). The disc, the optical disc, includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In the embodiment, a data transmission device is also provided, which is used to implement the above-mentioned embodiments and optional embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Despite the description of the following embodiments The implementation is preferably implemented in software, but hardware, or a combination of software and hardware, is also possible and contemplated.

3 is a block diagram showing the structure of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes a first determination module 32, a contention module 34, and a transmission module 36, which will be described below.

The first determining module 32 is configured to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, the LBT parameter includes a parameter used when performing the LBT, and the contention module 34 is connected to the foregoing A determining module 32 is configured to perform resource contention on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter; the transmitting module 36 is connected to the contention module 34 and configured to perform data transmission on the contending resources.

FIG. 4 is a structural block diagram 1 of a first determining module 32 in a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 4, the first determining module 32 includes at least one of the following units:

The first determining unit 42 is configured to determine the LBT mechanism and/or the LBT parameter according to a preset correspondence between the priority of the data to be transmitted and the LBT mechanism and the LBT parameter; and the second determining unit 44 is configured to serve according to the data to be transmitted. The preset relationship between the quality (Qos) level and the LBT mechanism and the LBT parameter determines the LBT mechanism and/or the LBT parameter; the third determining unit 46 is configured to determine the LBT mechanism and/or the LBT according to the first observed parameter of the observation window. The fourth determining unit 48 is configured to determine the LBT mechanism and/or the LBT parameter according to the indication information from the predetermined node.

In an optional embodiment, when the priority of the data to be transmitted is two or more, the LBT mechanism and/or the LBT are determined according to the preset correspondence between the maximum priority in the data to be transmitted and the LBT mechanism and the LBT parameter. In another optional embodiment, when the priority of the data to be transmitted is two or more, the LBT mechanism is determined according to the preset correspondence between the minimum priority of the data to be transmitted and the LBT mechanism and the LBT parameter. And the LBT parameter; in another optional embodiment, when the QoS level of the data to be transmitted is two or more, determining according to a preset correspondence between the maximum QoS level in the data to be transmitted and the LBT mechanism and the LBT parameter LBT mechanism and/or LBT parameter; in another optional embodiment, when the QoS level of the data to be transmitted is two or more, according to the minimum QoS level in the data to be transmitted and the LBT mechanism and the LBT parameter preset The correspondence determines the above LBT mechanism and/or LBT parameters.

In an optional embodiment, the duration of the observation window includes at least one of the following: when the LBT When the mechanism is LBT, the duration of the observation window is the time from the start of the previous uplink subframe of the same carrier or the adjacent carrier of the current LBT or the start of the previous uplink burst burst until the start of the LBT; When the LBT mechanism is configured to perform the LBT, the duration of the observation window is the time from the start time of the node scheduled to transmit or transmit data in the same subframe to the node currently executing the LBT to the time before the start of the LBT; adjacent The time between two scheduling or transmission opportunities; the time between consecutive k transmissions before the current time and the time before the start of the LBT, where k ≥ 1; between the two adjacent LBT backoff values Time; the LBT backoff value N value is generated to the time when the data transmission starts; the LBT backoff value N value is generated until the counter is decremented to 0.

In an optional embodiment, the indication information sent by the predetermined node includes at least one of: display signaling for indicating the LBT mechanism and/or the LBT parameter, and indicating whether the data to be transmitted is a new packet or a retransmission. The new data of the packet indicates NDI information; channel status information.

In an optional embodiment, the display signaling is determined by the predetermined node according to the second observation parameter of the observation window; in another optional embodiment, the display signaling is downlink control information DCI signaling and/or Or radio resource control RRC signaling.

FIG. 5 is a structural block diagram of a third determining unit 46 in the data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 5, the third determining unit 46 includes a comparing subunit 52 and a determining subunit 54, and the following The third determining unit 46 will be described.

The comparing subunit 52 is configured to compare the first observed parameter with a first predetermined threshold, wherein the first predetermined threshold is one or more thresholds; the determining subunit 54, connected to the comparing subunit 52, is set to The LBT mechanism and/or the LBT parameters are determined based on the comparison results.

In an optional embodiment, in the foregoing first determining module 32, in the case that the indication information sent by the predetermined node is received, the LBT mechanism and/or the LBT parameter are preferentially determined according to the indication information.

FIG. 6 is a block diagram 2 of a first determining module 32 in a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 6, the first determining module 32 includes a first adjusting unit 62, a second adjusting unit 64, and a third. The adjusting unit 66, the first determining module 32 will be described below.

The first adjusting unit 62 is configured to adjust the LBT system; the second adjusting unit 64 adjusts the size of the contention window in the LBT parameter; and the third adjusting unit 66 adjusts the size of the LBT backoff value N in the LBT parameter. Wherein the maximum value Nmax of the N is less than the backoff threshold.

FIG. 7 is a third structural block diagram of the first determining module 32 in the data transmission apparatus according to the embodiment of the present invention. As shown in FIG. 7, when determining the LBT parameter, the first determining module 32 includes a fifth determining unit 72, The fifth determining unit 72 will be described.

The fifth determining unit 72 is configured to determine that the LBT backoff value N in the LBT parameter is a predetermined minimum backoff value or to determine that the contention window length in the LBT parameter is a predetermined minimum contention window when at least one of the following conditions is met Length: Continuous or cumulative M times of LBT are unsuccessful, wherein M is a positive integer; it is not scheduled within the preset T1 time; the number of times of transmitting data on the unlicensed carrier within the preset T2 time is less than the preset number of times Threshold.

In an optional embodiment, the foregoing LBT mechanism includes at least one of: not performing LBT; performing LBT only once, and having no random backoff; performing LBT with random backoff, and the maximum fallback of the random backoff The value Nmax is a first predetermined backoff value; the LBT with random backoff is executed, and the maximum backoff value Nmax of the random backoff is variable, and Nmax is smaller than the second predetermined backoff value.

FIG. 8 is a structural block diagram of an apparatus for transmitting indication information according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes a second determination module 82 and a transmission module 84, which will be described below.

The second determining module 82 is configured to determine indication information, where the indication information is used by the transmitting node to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism and the LBT parameter are used by the foregoing transit node to compete for resources on the unlicensed carrier. And performing data transmission on the competing resources, wherein the LBT mechanism includes a manner adopted by the LBT, the LBT parameter includes a parameter used when performing the LBT, and the sending module 84 is connected to the second determining module 82, and configured. For the upper The indication information is sent to the transmission node.

In an optional embodiment, the indication information includes at least one of the following information: a display signaling for indicating an LBT mechanism and/or an LBT parameter, or adjusting an LBT parameter; and indicating that the data transmitted by the foregoing transmission node is scheduled to be The new packet is also the new data of the retransmission packet indicating the NDI information; channel state information.

In an optional embodiment, the foregoing display signaling is determined according to a second observation parameter of the observation window; and/or, the display signaling is downlink control information DCI signaling and/or radio resource control RRC signaling.

In an optional embodiment, the foregoing second observation parameter includes at least one of: whether information of data transmitted by the transmission node is detected in a preset time or an observation window; and a solution for demodulating data transmitted by the transmission node Adjusting the result; observing, in the observation window, whether the other node sends the scheduling data information on the uplink subframe of the same carrier or the nearest carrier of the adjacent carrier, wherein the other node is geographically located and the geographical position of the transmitting node is within a preset range a node within; a demodulation result of demodulating data transmitted by the other nodes; a sounding reference signal SRS reception result; channel state information; a reference signal received power RSRP; a reference information receiving quality RSRQ.

In an optional embodiment, the foregoing display signaling is determined according to the second observation parameter of the observation window, including: comparing the second observation parameter with a second predetermined threshold, wherein the second predetermined threshold is one or a plurality of thresholds; determining the above display signaling according to the comparison result.

FIG. 9 is a structural block diagram of a transmitting module 84 in a transmitting apparatus for indicating information according to an embodiment of the present invention. As shown in FIG. 9, the transmitting module 84 includes a first transmitting unit 92 and/or a second transmitting unit 94. The transmitting module 84 will be described.

The first sending unit 92 is configured to send different indication information to the transmission nodes scheduled to be in the same subframe; the second sending unit 94 is configured to send the same indication information to the transmission nodes whose geographical positions are different by less than the predetermined distance.

The following takes the above-mentioned transmission node as the UE and the predetermined node as the base station as an example, and the present application is exemplified in conjunction with the specific embodiments.

Embodiment 1

When the first transit node is a terminal, the process of the embodiment of the present invention is as follows:

The UE determines an LBT mechanism and corresponding related parameters (ie, the LBT parameters described above);

The UE performs resource competition on the unlicensed spectrum by using a preset LBT mechanism;

The UE performs data transmission on the unlicensed spectrum that is contending.

The LBT mechanism that the UE may adopt includes at least one of the following:

Manner 1: The UE does not perform LBT.

Manner 2: The UE performs only the LBT of the preset duration, and does not randomly roll back, or the backoff value N=0. The preset duration is 25 microseconds or 34 microseconds or other values.

Manner 3: The UE performs an LBT with a random backoff, and the maximum value of the random backoff is a preset value of one, and the preset value one (corresponding to the first predetermined backoff value described above) is 3, or 4, or 5 , or 6, or 7 or other values.

Manner 4: The UE performs an LBT with a random backoff, and the maximum value of the random backoff is variable, but is less than a preset value of two (corresponding to the second predetermined backoff value described above), where the preset value two is 3 One of 7, 7, or 1023, of course, the preset value two may also be other values.

In addition to determining or adjusting the LBT mechanism, the method provided in the embodiment of the present invention further includes determining or adjusting related parameters of the LBT, such as a backoff value N, and/or a contention window length.

Embodiment 2

In this embodiment, the LBT backoff value N and/or the contention window CW length in the LBT mechanism and/or the LBT parameter are determined by the transmitting node according to a preset manner.

The foregoing preset manner refers to a preset correspondence between a data transmission service type or a priority and an LBT mechanism or a backoff value N value or CW. For example, the LBT mechanism or the rollback value N corresponding to different Quality of Service (QoS) or service priority is shown in Table 1 below:

Table 1

For example, the File Transfer Protocol (FTP) service competes for resources according to the LBT parameters corresponding to the lowest level. The browsing webpage belongs to Best effort, and the resources compete according to the LBT parameters corresponding to the third level.

If the service level or the LBT level is divided into four types, all the integers smaller than the maximum contention window are divided into four levels corresponding to the service type, and one level corresponds to one or more N values.

For the case where one level corresponds to multiple N values, the first pass can use a larger N value, and each time the N value is decremented by one. Or the retransmission packet level is one level higher than the first transmission level.

When the base station simultaneously schedules multiple UEs, the backoff value N of each UE is determined separately according to the service type scheduled by itself.

When a transmission contains multiple data packets, the LBT parameters are determined according to the level to which the highest priority packet in the packet belongs.

Embodiment 3

This embodiment describes the observation window described in the embodiment of the present invention in detail.

When the base station determines the mechanism or the backoff value corresponding to the UE LBT, the observation window (OBWation Window, referred to as OBW) includes one of the following:

Between adjacent PUSCH scheduling or transmission of the same UE, and the time difference between the two PUSCH transmissions is within a preset range t1, such as t1 is less than 10 ms, as shown in FIG. 10, FIG. 10 is implemented according to the present invention. An example of the observation window of the example.

The consecutive k1 (k1 is greater than 1) PUSCH scheduling or transmission of the same UE, and the time of the k1 transmission is less than the preset threshold T, such as T does not exceed 10 ms, as shown in FIG. 11 is a schematic diagram 2 of an observation window according to an embodiment of the present invention.

The time from the previous uplink subframe or the previous uplink transmission burst of the same carrier that is the latest transmission subframe of the UE to the time before the start of the current UE LBT, as shown in FIG. 12, FIG. 12 is an observation according to an embodiment of the present invention. Window diagram three;

The time before the other UEs in the same subframe are scheduled or transmitted to the LBT last time;

The time between the two values of the N values of the neighboring UEs adjacent to each other;

The N value is generated to the time when the data transmission starts, or the N value is generated until the counter is decremented to 0. The value of N here is the same N value of the same UE or other UEs whose distance from the LBT UE is within a preset range.

When the UE itself determines or adjusts the backoff value of the LBT according to the observation parameters of the observation window, the above observation window includes one of the following:

The time between two adjacent scheduling or transmission opportunities of the UE;

The time before the UE is continuously k2 (k2 is greater than or equal to 1) or transmitted before the start of the LBT;

The time between the two values of the neighboring values of the neighboring N values of the UE;

The time when the UE last N value is generated until the start of data transmission, or the time when the last N value is generated until the counter is decremented to 0.

Then, the base station or the UE observes and observes the observed parameters in the observation window, and determines the adjusted parameters, such as the LBT mechanism or the LBT parameter, such as the backoff value or the contention window length, according to the adjusted rule, which is specifically as follows in the fourth embodiment. description.

Embodiment 4

This embodiment describes a method for determining a LBT mechanism and/or related parameters, such as a backoff value or a contention window, by a transmitting node, such as a UE, according to indication information sent by other transmitting nodes, such as a base station. The indication information here directly represents parameters such as LBT mechanism and/or backoff value.

The above indication information is determined by the base station according to the observation parameters of the observation window and the adjustment rules.

The observation parameters on which the base station is based include:

Whether the scheduled PUSCH is transmitted, the demodulation result of the PUSCH, according to the received signal quality of the SRS, or the channel interference condition, or RSRP/RSRQ.

Adjustment rules include:

When the time difference between the last scheduling and the current scheduling is within the preset range t2 (the t2 may be the same as the above t1), for example, t2 is less than 10 ms, the demodulation result of the last scheduled PUSCH may be referred to or the PUSCH is blindly detected. Adjust the LBT mechanism or the backoff value N.

Or, if the time difference between the consecutive k3 times of the PUSCH transmission and the current scheduling is less than the threshold, the LBT mechanism or the backoff value corresponding to the current scheduling may be adjusted according to the PU3 demodulation result of the continuous k3 times or whether the PUSCH is blindly detected. determine.

When the time difference between the last scheduling of the same UE and the current scheduling is greater than the preset value, the observation window may be between two adjacent uplink subframes, and the reference value is the last uplink subframe scheduling UE from the current scheduling UE. The N value of the nearest UE or the demodulation of the PUSCH is used as the basis for the scheduling UE adjustment.

The PUSCH here can only be for a new packet, or whether it is a new packet or a retransmission packet.

The adjustment process of the PUSCH demodulation result of the base station according to k4 (k4 is greater than or equal to 1) times is as follows:

If the number of BLERs greater than the preset threshold 1 reaches the threshold, or if the UE does not detect the PUSCH, the N is adjusted to be the maximum or the first one. If the number less than the preset threshold 2 reaches the threshold, the value of N is adjusted to be the minimum or minus one.

Or directly adjust the result and number of the Acknowledgement (abbreviated as ACK)/Non-Acknowledgement (NACK) in the previous sub-frame or the upper Q sub-frames.

For the uplink, if multiple subframes are continuously transmitted, if all packets are resolved, the value of N becomes minimum, or the value of N decreases by one step n1. If there is a solution, the value of N is increased by one step n2, and the step size n2 can be 1 or 2.

Alternatively, the base station only changes the value of N based on the previous data demodulation result.

For example, the current N value adjustment is performed based on the value of the BLER of the last PUSCH demodulation. For example, if bler is greater than the threshold, such as 0.3, then N=5 or 6. If the BLER is less than 0.05, then N=1 or 0, and the middle N=2 or 3.

When the last burst is a plurality of consecutive subframes, the base station adjusts according to the demodulation results of the multiple subframes, for example, when a packet is decoded or the proportion of the error reaches a threshold, the value of N becomes larger. The step size, when all the packages are solved, the N value becomes the minimum value.

Here, in order to consider the fairness between the competition of the transmission nodes, the adjustment of N is made larger or smaller.

Then, the base station notifies the UE of the adjusted value of N by signaling, which can be used as a parameter of the next LBT of the UE. How to signal specific signaling is explained in Embodiment 5.

Embodiment 5

This embodiment describes the LBT mechanism or LBT parameters provided in Embodiment 4, such as the backoff value indication signaling.

When the transit node supports multiple LBT mechanisms at the same time or the backoff value has multiple values, specific LBT parameters can be determined through different signaling.

When the transmitting node performing the LBT is the UE, the LBT mechanism and/or the LBT parameter may be dynamically or semi-statically determined by the base station, and then the adjusted value or the resizing value is notified to the UE.

The method for notifying by DCI includes: defining a new DCI format, such as format X, which includes LBT-related configuration parameter information, such as a backoff value N, and a contention window length.

Optionally, DCI defines 3 bits, 000 represents N=0 (corresponding to mode 2 in the LBT mechanism), 001 corresponds to LBT mechanism mode 3 or mode 4, N=1, 010 corresponds to LBT mechanism mode 3 or mode 4 N=2,011 corresponds to LBT mechanism mode 3 or mode 4 N=3, 100 represents LBT mechanism mode 3 or mode 4 N=4, 101 represents LBT mechanism mode 3 or mode 4 N=5,110 Representing the N=6,111 reservation in the LBT mechanism mode 3 or mode 4, it can be directly transmitted on behalf of the UE without performing LBT, that is, mode 1 in the LBT mechanism.

Or only 1 bit is defined, 0 means that the value of N increases, and 1 means that the value of N decreases, and the step size of each decrease or increase is a preset value of 1 or 2.

Or use the existing DCI format to indicate with unused bits that are saved. For example, it can be indicated by 2 bits in the resource allocation field. 00 corresponds to N=0, that is, the LBT mechanism mode 2 is executed.

In addition to dynamically notifying the LBT mechanism or the backoff value of the UE through DCI signaling, the base station may also be semi-statically adjusted by RRC signaling once in a preset period of time.

For example, define an RRC message, which includes the LBT mechanism and various mechanisms. parameter.

Optionally, four mechanisms for the 4-bit signaling corresponding to the LBT may be defined, and whether the mechanism is enabled by whether the bit is 1. For example, 1000, indicating that the LBT mechanism mode is enabled, that is, the transmission node may not perform LBT. The message may also include a specific value of the backoff value or the length of the contention window. When the LBT mechanism is enabled or disabled, the message corresponding to the rollback value is not enabled. That is, when the LBT mechanism 3 or the mechanism 4 is enabled, the rollback value or the contention window length message is enabled. For example, the backoff value in the message has 2bit signaling, and 11 represents N=4. And the RRC message includes a period for configuring the LBT mechanism or parameters, that is, the configuration information is valid during the period.

For the semi-static configuration of the RRC message, the base station determines the {L, by the {LX, LX-1, ..., L-1} LBT mechanism and/or the LBT backoff value or the competition window length parameter and the observation result. L+1,..., L+K} times the LBT mechanism and/or the LBT backoff value or the competition window length parameter, where X and K are both positive integers greater than one.

When the LBT mechanism and the DCI signaling configured by the UE RRC message exist simultaneously, the UE adjusts the LBT mechanism and/or the LBT parameter according to the DCI signaling.

Embodiment 6

In addition to adjusting the LBT mechanism and/or the LBT parameters according to the detection or demodulation result of the uplink data, the base station may also jointly determine according to other information.

For example, if the scheduling UE sends an SRS on the unlicensed carrier within a preset period of time or an observation window, the base station may further perform N value adjustment according to the channel measurement result of the SRS. If the calculated interference is less than the preset threshold, then N is decreased by one step, and if it is greater than the threshold, the value of N is increased by one step.

For TDD, the uplink and downlink channel reciprocity can also be utilized, for example, by using the CQI fed back by the UE in the observation window to assist in determining the N value.

Alternatively, the base station may further determine and adjust the value of N according to the RSRP/RSRQ of the UE. When the RSRP/RSRQ in the observation window is greater than the threshold, the base station sends an indication signaling with a reduced value of N. When the RSRP/RSRQ is smaller than the threshold, the base station sends an indication signaling with an increased value of N.

Here, the N value is increased or decreased to ensure fairness between different nodes.

Example 7

This embodiment describes a case where the transmission node itself determines and adjusts the backoff value.

The first transmission node (same as the above-mentioned transmission node) may determine the LBT mechanism in addition to the displayed indication signaling sent by the second node (same as the predetermined node described above), or may determine or otherwise determine by receiving other information sent by the second node. Adjust the parameters of the LBT mechanism or LBT.

For example, the first transit node UE adjusts the parameters of the LBT mechanism or the LBT based on the NDI information in the UL grant sent by the second node (eg, the eNB).

among them:

1) The UE adjusts the current N according to the N of the previous uplink burst.

For a single subframe scheduling or a scenario in which one UL burst contains only one subframe or multiple subframes corresponding to one DCI, an N value adjustment is performed according to whether the NDI is flipped this time. If the NDI is flipped, the value of N does not change or is reduced by one step. If the NDI does not flip, the value of N is expanded by one step in steps of 1 or 2.

For a case where a burst corresponds to multiple DCIs, it is determined according to the number of NDI=0 in the DCI. If the number is greater than the preset threshold, the value of N is reduced, and when the number is smaller than the preset threshold, the value of N is increased.

2) When NDI is received N times within a predetermined observation time T, where k (k is greater than or equal to 1) times, no deflection occurs, then the UE's N is doubled or smaller, such as from 1 to 2, or Change from 2 to 3 and no longer change after reaching the maximum value.

Conversely, if the NDI has a k'th deflection in the preset time, then N becomes one step, such as minus one, or minus two, or becoming a minimum, such as N=0.

Here, the N value is adjusted to be small or small, and it is also based on the principle of fairness.

In addition, the competition site may not consider fairness, but only from its own interests, each time N adjusts in the opposite direction to increase the probability of competing to the carrier. For example, when the last scheduled LBT is not successful, or the base station does not decode correctly, the priority of the LBT success may be increased, for example, the maximum contention window is reduced, or the minimum contention window is decreased, or the backoff value may be decreased.

Example eight

This embodiment is described based on the UE's own adjustment of the measurement perception result of the LBT in the observation window.

If the time difference between the time of the previous M (M is greater than 1) LBT and the current LBT is less than a preset threshold, For example, 10ms, the UE can use the L times LBT as the observation window, and adjust the N value or LBT mechanism of the LBT according to the previous M times LBT observation result and the N value.

Observation parameters include:

The number of times the channel is busy, or the ratio of the number of busy times to the total number of LBT slots, the number of busy slots, or the ratio of the number of busy slots to the total number of slots.

Or the number of idle times, or the ratio of the number of idle times to the total number of LBT slots, the number of free slots, or the ratio of the number of free slots to the total number of slots.

Wherein, the channel is idle: the channel is detected by the eCCA length and the channel is detected to be idle; the channel is busy: the channel is busy between the two channels idle, and the channel is busy;

The rules for adjustment include:

When the adjustment basis is less than the preset threshold, the value of N is decreased by one step, the step size is one or two, or the value of N becomes minimum.

When the adjustment basis is greater than the preset threshold, the value of N is increased by one step, and the maximum value cannot exceed the preset maximum value.

Or the UE adjusts the N value or the LBT mechanism in the kth LBT according to the busy/busy duration and the free/busy ratio in the LBT process before the k-1th transmission.

In the first M times or the preset observation window, if the number of times that the single eCCA detection is busy/total number of slots is greater than the threshold, the k value of the kth time is increased by one step, and the proportion of the number of free/total slots is less than Threshold, then N is reduced by one step, or the number of idle / (busy busy).

Example nine

The value of the N value allocated by the base station to the different UEs in the same subframe is determined separately according to the observation result of each UE observation window. For example, the UE1 that is scheduled to be in the same subframe allocates N=0, and the UE2 allocates N=1, and allocates to the UE3. N=2. Then, each UE performs LBT according to the received information indication and the preset LBT process, and finally, by using the self-delay mode in the LBT process, multiple UEs can simultaneously send uplink data at the same time to implement multi-user multiplexing.

Or assigning the same N value to the UEs with the same geographical location, and the value of N may be jointly determined according to the N value of the previous UE when the multiple UEs are transmitted and the demodulation result of the PUSCH, or the group of UEs only according to the latest one of the UEs. The PUSCH results and the LBT mechanism are determined.

Generally, the LBT of each UE is scheduled according to the LBT mechanism corresponding to the service level, or the LBT is performed according to the indication signaling sent by the base station.

Specifically, for a case where one burst is one subframe, the LBT of the same data packet can be frozen if the first LBT is unsuccessful, and the N value is not allocated when the base station schedules the data packet again. For LBT of different data packets, the N value is cleared. If the new N value is received next time, it will be new. If no signal is received, it will be adjusted according to the adjustment principle.

Example ten

When a UE performs LBT on multiple carriers, the LBT parameters of each carrier are individually determined to be adjusted.

At the same time, when multiple UEs compete for the same carrier, the parameter base stations of each UE are configured with the same carrier, and the adjustment is determined according to the observation parameters of the UE in the observation window.

For example, the base station schedules UE1, UE2, and UE3, and the base station can configure the same backoff value N for the three UEs. The value of N may be determined according to the result of the last one of the three UEs and the value of N. For example, if the N value of the LBT configuration of the UE1 is configured to be 1 in the previous subframe, but the LBT of the UE1 is not successful, the N value of the base station configuration may be 2.

Embodiment 11

When a UE performs LBT on multiple carriers, each carrier can adjust the carrier by referring to other adjacent carrier LBT conditions or data demodulation results.

For example, when the base station adjusts the LBT parameter, the previous observation window, or the carrier where the other UEs of the UE or the subframe is scheduled last time, is different from the current scheduled carrier. Then, the parameters of the LBT can be adjusted according to the LBT parameters of the adjacent carriers. For example, the value of the backoff value configured by the UE when the neighboring carrier performs the LBT is N1, but the base station does not receive the data sent by the UE, or the BLER value of the decoding of the PUSCH by the base station is greater than a threshold, or the base station measures the measured value. The interference is greater than the preset threshold. Then, the base station can configure a backoff value N2 for the UE of the LBT, where N2 is smaller than N1. This can improve the probability that the UE's own carrier will compete successfully in the current LBT resource competition process.

Example twelve

In this embodiment, the correspondence between the backoff value and the competition window maximum value q is described.

The adjustment of the rollback value is consistent with the adjustment of q, and the adjustment granularity of the maximum value q of the contention window may be different from the adjustment granularity of the backoff value.

For example, according to the service priority, the q corresponding to the previous time has changed. When q is changed from 15 to 7, the value range of N is also small. For example, the value of N is changed from 10 to 5.

Example thirteen

This embodiment describes a method for jointly adjusting N according to a preset level and signaling.

The base station can notify the UE LBT of an approximate range of N values through semi-static signaling, and then dynamically indicate a specific N value through DCI signaling.

For example, if the data of the UE scheduled by the base station belongs to a certain service priority within a certain period of time, and the LBTs belong to a mechanism, or the N values belong to a small range, the base station may first send an RRC signaling to the UE. Indicates the mechanism of the LBT, or the range of fallback values. Then, the specific LBT parameters at the time of each subsequent scheduling, the base station further adjusts on this basis, and notifies the UE through the DCI.

The method for determining the unlicensed spectrum competition mechanism provided in the embodiment of the present invention solves the specific problem of resource competition when the LTE performs uplink data transmission on the unlicensed carrier, improves the probability of successful LBT execution during terminal scheduling, and finally improves the uplink scheduling data. The probability of transmission reduces the delay of the uplink transmission and alleviates the problem of the control signaling corresponding to the UL grant and the waste of the allocated resources due to the failure of the terminal to perform the LBT.

It should be noted that although some embodiments adjust the object with the back-off value as an example, the same applies to the competition window length or the LBT mechanism or the LBT level.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S11. Determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, where the LBT parameter includes a parameter used when performing the LBT;

S12. Perform resource competition on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter. Fight

S13: Perform data transmission on the resources obtained by the competition.

Optionally, the storage medium is further arranged to store program code for performing the following steps:

S21. Determine indication information, where the indication information is used by the transmitting node to determine a clean channel estimation LBT mechanism and an LBT parameter, where the LBT mechanism and the LBT parameter are used by the transmitting node to compete for resources on the unlicensed carrier, and the resources that are competing Performing data transmission, wherein the LBT mechanism includes a manner of performing LBT, and the LBT parameter includes parameters used when performing LBT;

S22. Send the indication information to the transmission node.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

Optionally, in the embodiment, the processor performs the above steps S11-S13 according to the stored program code in the storage medium.

Optionally, in the embodiment, the processor performs the above steps S21-S22 according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

Obviously, those skilled in the art should understand that the above modules or steps of the embodiments of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Where in the spirit of the present invention Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The embodiment of the present invention provides a data transmission method, a method and a device for transmitting indication information, where the data transmission method includes: determining a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, The LBT parameter includes parameters used when performing LBT; resource competition is performed on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter; and data transmission is performed on the competing resources. The embodiments of the present invention can improve the probability that a node successfully competes for resources on an unlicensed carrier.

Claims

A data transmission method, the method comprising:

Determining a clean channel assessment LBT mechanism and an LBT parameter, wherein the LBT mechanism includes a manner in which the LBT is performed, the LBT parameter including a parameter used when performing the LBT;

Performing resource competition on the unlicensed carrier according to the determined LBT mechanism and the LBT parameter;

Data transmission is performed on resources obtained from competition.
The method of claim 1, wherein said determining said LBT mechanism and said LBT parameters comprises at least one of:

Determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a priority of the data to be transmitted and an LBT mechanism and an LBT parameter;

Determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a quality of service QoS level of the data to be transmitted and an LBT mechanism and an LBT parameter;

Determining the LBT mechanism and/or the LBT parameter according to a first observed parameter of the observation window;

The LBT mechanism and/or the LBT parameters are determined based on indication information from a predetermined node.
The method according to claim 2, wherein the determining the LBT mechanism and/or the location according to a priority of a data to be transmitted or a preset correspondence between a Qos level of a data to be transmitted and an LBT mechanism and an LBT parameter. The LBT parameters, including at least one of the following:

When the priority of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a maximum priority in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the priority of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a minimum priority in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the QoS level of the data to be transmitted is two or more, determining the LBT mechanism and/or the LBT parameter according to a preset correspondence between a maximum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter;

When the QoS level of the data to be transmitted is two or more, the LBT mechanism and/or the LBT parameter are determined according to a preset correspondence between a minimum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter.
The method of claim 2 wherein the duration of the observation window comprises at least one of:

When the LBT mechanism is to perform the LBT, the duration of the observation window is the start of the previous uplink subframe of the same carrier or the adjacent carrier that is closest to the LBT or the start of the previous uplink burst burst transmission to the beginning of the LBT Previous time;

When the LBT mechanism is performing LBT, the duration of the observation window is a time before the start time of the LBT is scheduled to be scheduled from the start time of the other node of the same subframe in the same subframe or the time when the current LBT is started;

The time between two adjacent scheduling or transmission opportunities;

The time from the start of the continuous k transmissions before the current time to the time before the start of the LBT, where k≥1;

The time between the occurrence of two adjacent LBT backoff values N values;

The LBT backoff value N value is generated until the start of data transmission;

The LBT backoff value N value is generated until the counter is decremented to zero.
The method according to claim 2, wherein the indication information sent by the predetermined node comprises at least one of the following:

Display signaling for indicating the LBT mechanism and/or the LBT parameters;

New data indicating whether the data to be transmitted is a new packet or a retransmission packet indicates NDI information;

Channel status information.
The method of claim 5, wherein

The display signaling is determined by the predetermined node according to a second observed parameter of the observation window; and/or,

The display signaling is downlink control information DCI signaling and/or radio resource control RRC signaling.
The method of claim 2 wherein said first observed parameter comprises at least one:

The number of times the channel is busy, the ratio of the number of busy channels to the total number of LBT slots, the number of slots busy on the channel, the ratio of the number of busy channels to the total number of LBT slots, the number of times the channel is idle, and the channel is idle. The ratio of the number of times to the total number of LBT slots, the number of slots in which the channel is idle, the ratio of the number of slots in which the channel is idle to the total number of LBT slots, the number of failed LBTs, and the number of successful LBTs.
The method of claim 2, wherein the determining the LBT mechanism and/or the LBT parameters based on a first observed parameter of an observation window comprises:

Comparing the first observed parameter with a first predetermined threshold, wherein the first predetermined threshold is one or more thresholds;

The LBT mechanism and/or the LBT parameters are determined based on the comparison.
The method of claim 2, wherein the determining the LBT mechanism and the LBT parameters based on indication information from a predetermined node comprises:

In the case that the indication information sent by the predetermined node is received, the LBT mechanism and/or the LBT parameter are preferentially determined according to the indication information.
The method of claim 1 wherein said determining said LBT mechanism and LBT parameters comprises:

Adjusting the standard of the LBT;

Adjusting a size of a contention window in the LBT parameter;

And adjusting a size of the LBT backoff value N in the LBT parameter, where the maximum value Nmax of the N is less than a backoff threshold.
The method of claim 1 wherein said determining said LBT parameters comprises:

When at least one of the following conditions is met, determining that the LBT backoff value N in the LBT parameter is a predetermined minimum backoff value, or determining that a contention window length in the LBT parameter is a predetermined minimum contention window length:

There is no success in continuous or cumulative M times of LBT, wherein the M is a positive integer;

Not scheduled during the preset T1 time;

The number of times the data is transmitted on the unlicensed carrier within the preset T2 time is less than a preset number of times threshold.
The method according to any one of claims 1 to 11, wherein the LBT mechanism comprises at least one of the following:

Do not perform LBT;

LBT is executed only once and there is no random rollback;

Performing an LBT with a random backoff, and the maximum backoff value Nmax of the random backoff is a first predetermined backoff value;

The LBT with random backoff is executed, and the maximum backoff value Nmax of the random backoff is variable, and Nmax is smaller than the second predetermined backoff value.
The method of any of claims 1 to 11, wherein the LBT parameters comprise at least one of the following:

The maximum value of the competition window length, the minimum value of the competition window length, the duration of one LBT, the regression value of LBT, and the level of LBT.
A method for transmitting indication information, the method comprising:

Determining indication information, wherein the indication information is used by a transmitting node to determine a clean channel assessment LBT mechanism and an LBT parameter, wherein the LBT mechanism and the LBT parameter are used by the transmitting node to compete for resources on an unlicensed carrier, and Data transmission is performed on the resources obtained by the competition, wherein the LBT mechanism includes a manner adopted for performing LBT, and the LBT parameters include parameters used when performing LBT;

Sending the indication information to the transmission node.
The method of claim 14, wherein the indication information comprises at least one of the following information:

Display signaling for indicating the LBT mechanism and/or the LBT parameter, or adjusting the LBT parameter;

New data indicating that the data scheduled for transmission by the transmitting node is a new packet or a retransmission packet indicates NDI information;

Channel status information.
The method of claim 15 wherein

The display signaling is determined according to a second observed parameter of the observation window; and/or,

The display signaling is downlink control information DCI signaling and/or radio resource control RRC signaling.
The method of claim 16 wherein said second observed parameter comprises at least one of:

Whether information of data transmitted by the transmission node is detected in a preset time or in an observation window;

Demodulation result of demodulating data transmitted by the transmission node;

Observing, in the observation window, information of whether the other node sends the scheduling data on the uplink subframe of the same carrier or the nearest carrier of the adjacent carrier, where the other nodes are geographically located and the geographical position of the transmission node is within a preset range Node

Demodulation result of demodulating data sent by the other node;

Sounding reference signal SRS reception result;

Channel status information;

Reference signal received power RSRP;

Reference information reception quality RSRQ.
The method of claim 16, wherein the display signaling is determined according to a second observed parameter of the observation window, comprising:

Comparing the second observed parameter with a second predetermined threshold, wherein the second predetermined threshold is one or more thresholds;

The display signaling is determined based on the comparison result.
The method of claim 14, wherein transmitting the indication information to the transmission node comprises:

Sending different indication information to the transmission nodes scheduled to be in the same subframe; and/or,

The same indication information is sent to the transmission nodes whose geographical positions differ by less than the predetermined distance.
A data transmission device, the device comprising:

a first determining module, configured to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing the LBT;

a competition module, configured to perform resource competition on an unlicensed carrier according to the determined LBT mechanism and the LBT parameter;

The transmission module is configured to perform data transmission on the resources obtained from the competition.
The apparatus of claim 20, wherein the first determining module comprises at least one of:

a first determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a preset correspondence between a priority of the data to be transmitted and an LBT mechanism and an LBT parameter;

a second determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a preset correspondence between a quality of service QoS level of the data to be transmitted and an LBT mechanism and an LBT parameter;

a third determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to a first observed parameter of the observation window;

And a fourth determining unit, configured to determine the LBT mechanism and/or the LBT parameter according to the indication information from the predetermined node.
The apparatus of claim 21, comprising at least one of the following:

The first determining unit is configured to: when the priority of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a maximum priority in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The first determining unit is configured to: when the priority of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a minimum priority in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The second determining unit is configured to: when the QoS level of the data to be transmitted is two or more, determine the LBT mechanism according to a preset correspondence between a maximum QoS level in the data to be transmitted and an LBT mechanism and an LBT parameter. / or the LBT parameters;

The second determining unit is configured to: when the QoS level of the data to be transmitted is two or more, according to a preset correspondence between the minimum QoS level in the data to be transmitted and the LBT mechanism and the LBT parameter Determining the LBT mechanism and/or the LBT parameters.
The apparatus according to claim 21, wherein said third determining unit comprises:

Comparing the subunits, the setting is to compare the first observed parameter with a first predetermined threshold, wherein the first predetermined threshold is one or more thresholds;

The determining subunit is configured to determine the LBT mechanism and/or the LBT parameter based on the comparison result.
The device according to claim 21, wherein

The first determining module is configured to determine, according to the indication information, the LBT mechanism and/or the LBT parameter according to the indication information that is sent by the predetermined node.
The apparatus of claim 20, wherein the first determining module comprises:

a first adjusting unit, configured to adjust a format of the LBT;

a second adjusting unit, configured to adjust a size of a contention window in the LBT parameter;

The third adjusting unit is configured to adjust a size of the LBT backoff value N in the LBT parameter, where the maximum value Nmax of the N is less than a backoff threshold.
The apparatus of claim 20, wherein when determining the LBT parameter, the first determining module comprises:

a fifth determining unit, configured to determine that the LBT backoff value N in the LBT parameter is a predetermined minimum backoff value or to determine a contention window length in the LBT parameter is a predetermined minimum competition when at least one of the following conditions is met Window length:

There is no success in continuous or cumulative M times of LBT, wherein the M is a positive integer;

Not scheduled during the preset T1 time;

The number of times the data is transmitted on the unlicensed carrier within the preset T2 time is less than a preset number of times threshold.
A transmitting device for indicating information, the device comprising:

a second determining module, configured to determine indication information, where the indication information is used by the transmitting node to determine a clean channel assessment LBT mechanism and an LBT parameter, where the LBT mechanism and the LBT parameter are used by the transmitting node in an unlicensed carrier Competing on resources and advancing on resources acquired from competition Line data transmission, wherein the LBT mechanism includes a manner in which the LBT is performed, and the LBT parameter includes a parameter used when performing the LBT;

And a sending module, configured to send the indication information to the transmitting node.
The apparatus of claim 27, wherein the transmitting module comprises:

a first sending unit, configured to send different indication information to a transmission node scheduled to be in the same subframe; and/or,

The second sending unit is configured to send the same indication information to the transmitting node whose geographical position is different by less than the predetermined distance.