WO2017133008A1 - Idle channel evaluation method and terminal - Google Patents

Abstract

Disclosed is an idle channel evaluation method. The method comprises: evaluating, within a first pre-set time period, whether an unlicensed frequency spectrum resource is idle based on a first channel evaluation criteria; if it is idle, determining a second channel evaluation criteria as a channel evaluation criteria for evaluating whether the unlicensed frequency spectrum resource is idle; or if it is not idle, determining a third channel evaluation criteria as a channel evaluation criteria for evaluating whether the unlicensed frequency spectrum resource is idle, wherein the second channel evaluation criteria evaluates that the unlicensed frequency spectrum resource is idle more easily than the first channel evaluation criteria, and the third channel evaluation criteria evaluates that the unlicensed frequency spectrum resource is idle more difficultly than the first channel evaluation criteria; and evaluating whether the unlicensed frequency spectrum resource is idle by means of the determined channel evaluation criteria, and when it is evaluated that the unlicensed frequency spectrum resource is idle, sending uplink data to a network device by means of the unlicensed frequency spectrum resource. By adopting the method, an unlicensed frequency spectrum resource can be used more reasonably.

Description

Idle channel evaluation method and terminal Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and terminal for evaluating an idle channel.

Background technique

The device in the Long-term Evolution (LTE) can use Carrier Aggregation (CA) to use the carrier on the licensed band as the primary component carrier (PCC) or the primary cell (Primary Cell, PCell). The carrier on the unlicensed band is used as a secondary component carrier (SCC) or a secondary cell (SCell) to improve the communication efficiency of the device in the LTE. Whether the base station in the LTE uses the unlicensed spectrum resource (that is, the carrier on the unlicensed band) to send the downlink data or the terminal (such as the user equipment (UE)) uses the unlicensed spectrum resource to send the uplink data, A listen-before-talk (LBT) mechanism is used to evaluate whether the unlicensed spectrum resource is idle. If the unlicensed spectrum resource is estimated to be idle, the license-free spectrum resource can be used for a certain period of time.

When the base station evaluates that the unlicensed spectrum resource is idle, the base station may send downlink data based on the unlicensed spectrum resource, and when the terminal evaluates that the unlicensed spectrum resource is idle, the terminal may further send uplink data according to the uplink scheduling of the source base station, and the terminal needs to When the uplink data is sent when the uplink scheduling indication is reached, the unlicensed spectrum resource needs to be preempted in time for the uplink scheduling. The prior art is configured to more easily evaluate the channel evaluation criteria for the idle spectrum of the unlicensed spectrum resource. To ensure that the terminal can seize the license-free spectrum resources in time. This also results in the unfair use of unlicensed spectrum resources between devices such as terminals and base stations, wireless access points (APs), and stations (Stations, STAs).

A disadvantage of the prior art is that the terminal does not use the channel evaluation standard reasonably, resulting in unreasonable use of the unlicensed spectrum resource.

Summary of the invention

The embodiment of the invention discloses a method for evaluating an idle channel and a terminal, which can reasonably use the unlicensed spectrum resource.

In a first aspect, an embodiment of the present invention provides a method for evaluating an idle channel, where the method includes:

The terminal evaluates whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period; specifically, the network device (eg, the base station) that provides the scheduling service for the terminal indicates that the terminal passes the uplink scheduling signaling The unlicensed spectrum resource transmits the transmission time of the uplink data, and the device does not use the unlicensed spectrum resource within the listening range of the base station.

If idle, the terminal determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or, if not idle, determining, by the terminal, the third channel evaluation criterion as the evaluation A channel evaluation criterion for whether the unlicensed spectrum resource is idle, wherein the probability of the unlicensed spectrum resource being idle based on the second channel evaluation criterion is not less than the estimated unlicensed spectrum resource based on the first channel evaluation criterion The probability of being idle, based on the third channel evaluation criterion, estimating that the probability of the unlicensed spectrum resource being idle is less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion; specifically, if not idle It is highly probable that other devices (such as wireless access points) that are not served by the network device use the unlicensed spectrum resource, so that the terminal and the other device use the unlicensed spectrum resource unfairly. The channel evaluation criteria can be adjusted to enable the terminal and the other device to use the unlicensed spectrum resources. Fair; if idle, it indicates that the unlicensed spectrum resource does not exist in the listening range of the base station and the terminal, and the other device does not use the unlicensed spectrum resource. In this case, the channel evaluation standard can be adjusted to provide the terminal with the license-free license. The efficiency of spectrum resources.

And determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and transmitting uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle.

By performing the above steps, the subsequent channel evaluation criteria are determined according to the results of the first channel evaluation criteria, and the newly determined channel estimation criteria are used to evaluate whether the unlicensed spectrum resources are idle, so that the use of the unlicensed spectrum resources is further improved. reasonable.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the terminal is first The method further includes: before estimating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the preset time period, the method further includes:

Receiving, by the terminal, an indication message sent by the network device, where the indication message includes information about the unlicensed spectrum resource and information of the first preset time period, where the first preset time period is in the network The device uses the unlicensed spectrum resource to transmit the maximum channel occupation time MCOT of the downlink data.

Specifically, the first preset time period is limited to the MCOT used by the network device for downlink transmission, so that the result evaluated based on the first channel evaluation criterion is more valuable for determining a subsequent channel evaluation criterion.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the terminal, by using the determined channel estimation criterion, to evaluate the unlicensed spectrum resource Whether it is free or not includes:

And determining, by the terminal, whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion in the first preset time period.

Specifically, it is timely to evaluate whether the unlicensed spectrum resource is idle through the newly determined channel evaluation standard, so that the evaluation result is more accurate.

With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, Evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion within a preset time period includes:

Determining, by the terminal, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit according to the first channel evaluation criterion in the first preset time period;

And determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and sending the uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle:

And determining, by the terminal, whether the unlicensed spectrum resource is idle in the scheduled second transmission time unit, based on the determined channel evaluation criterion, in the first preset time period, and evaluating the license-free spectrum Passing the unlicensed spectrum resource on the second transmission time unit when the resource is idle The uplink data is transmitted, and the second transmission time unit is after the first transmission time unit.

With reference to the first aspect, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in the first aspect In the four possible implementation manners, the determining, by the terminal, whether the unlicensed spectrum resource is idle according to the first channel evaluation criterion in the first preset time period includes:

The terminal performs a step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once in the first preset time period.

Specifically, the final evaluation result is determined based on the result of the evaluation using the first channel evaluation criterion multiple times, and the error of the evaluation result is reduced.

With reference to the first aspect, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, or the first aspect Four possible implementations, in the fifth possible implementation of the first aspect:

The channel evaluation criteria for determining, by the terminal, the second channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle includes:

Determining, by the terminal, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

The terminal determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

The terminal determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.

Specifically, an expiration date is set for the newly determined channel evaluation standard to prevent the terminal from easily preempting the unlicensed spectrum resource for a long time, or it is too difficult to grab the license-free spectrum resource for a long time, resulting in the license-free spectrum. The use of resources is unreasonable.

In a second aspect, an embodiment of the present invention provides a terminal, where the terminal includes:

a first evaluation unit, configured to evaluate, according to the first channel evaluation criterion, whether the unlicensed spectrum resource is idle during the first preset time period;

a determining unit, configured to determine, when the first evaluation unit evaluates that the result is idle, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or When the result of the evaluation unit evaluation is idle, the terminal determines a third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, wherein the unlicensed spectrum is evaluated based on the second channel evaluation criterion. The probability that the resource is idle is not less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, and the probability that the unlicensed spectrum resource is idle based on the third channel evaluation criterion is less than A channel evaluation criterion estimates the probability that the unlicensed spectrum resource is idle;

a second evaluation unit, configured to: determine, by the channel evaluation criterion determined by the determining unit, whether the unlicensed spectrum resource is idle, and send, by using the unlicensed spectrum resource, to the network device when evaluating that the unlicensed spectrum resource is idle Upstream data.

By running the above unit, the subsequent channel evaluation criteria are determined according to the results of the first channel evaluation criteria, and the newly determined channel evaluation criteria are used to evaluate whether the unlicensed spectrum resource is idle, so that the use of the license-free spectrum resource is further improved. reasonable.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the terminal further includes:

a receiving unit, configured to receive, after the first evaluation unit, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, the indication message sent by the network device, where the indication message includes The information of the unlicensed spectrum resource and the information of the first preset time period, the first preset time period is within a maximum channel occupation time MCOT of the network device using the unlicensed spectrum resource to send downlink data .

Specifically, the first preset time period is limited to the MCOT used by the network device for downlink transmission, so that the result evaluated based on the first channel evaluation criterion is more valuable for determining a subsequent channel evaluation criterion.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the second evaluation unit is configured by the channel evaluation criterion determined by the determining unit Whether the exempted spectrum resources are idle is as follows:

The second evaluation unit passes the determined channel evaluation target in the first preset time period It is possible to assess whether the unlicensed spectrum resource is free.

Specifically, it is timely to evaluate whether the unlicensed spectrum resource is idle through the newly determined channel evaluation standard, so that the evaluation result is more accurate.

With reference to the second aspect, or the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in a third possible implementation of the second aspect:

The first evaluation unit is configured to: during the first preset time period, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit based on the first channel evaluation criterion;

The second evaluation unit is configured to: during the first preset time period, whether the unlicensed spectrum resource is idle on the scheduled second transmission time unit, based on the determined channel estimation criterion, and Evaluating, when the unlicensed spectrum resource is idle, transmitting uplink data by using the unlicensed spectrum resource on the second transmission time unit, where the second transmission time unit is after the first transmission time unit.

With reference to the second aspect, or the first possible implementation of the second aspect, or the second possible implementation of the second aspect, or the third possible implementation of the second aspect, in the second aspect In the four possible implementation manners, the first evaluating unit is specifically configured to perform, at the first preset time period, the step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once.

Specifically, the final evaluation result is determined based on the result of the evaluation using the first channel evaluation criterion multiple times, and the error of the evaluation result is reduced.

With reference to the second aspect, or the first possible implementation of the second aspect, or the second possible implementation of the second aspect, or the third possible implementation of the second aspect, or the second aspect Four possible implementations, in a fifth possible implementation of the second aspect:

The determining unit determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

The determining unit determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

The determining unit determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

The determining unit determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.

Specifically, an expiration date is set for the newly determined channel evaluation standard to prevent the terminal from easily preempting the unlicensed spectrum resource for a long time, or it is too difficult to grab the license-free spectrum resource for a long time, resulting in the license-free spectrum. The use of resources is unreasonable.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes an output device, a memory, and a processor, where the processor invokes an idle channel evaluation program in the memory, to perform the following operations:

Evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period;

If idle, determining the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or, if not idle, determining the third channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle Channel estimation criteria, wherein the probability of evaluating the unlicensed spectrum resource idle based on the second channel evaluation criterion is not less than a probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, based on The third channel evaluation criterion estimates that the probability of the unlicensed spectrum resource being idle is less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion;

And determining, by the determined channel evaluation criterion, whether the unlicensed spectrum resource is idle, and transmitting, by using the output device, the uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle.

By running the above procedure, the terminal determines a subsequent channel evaluation criterion according to the result of the first channel evaluation criterion, and evaluates whether the unlicensed spectrum resource is idle through the newly determined channel estimation criterion, so that the use of the license-free spectrum resource is enabled. More reasonable.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the terminal further includes an input device, and the processor is further configured to perform, based on the first channel evaluation criterion, in the first preset time period Before the unlicensed spectrum resource is idle, receiving, by the input device, the network device sends And an indication message, where the indication message includes the information of the unlicensed spectrum resource and the information of the first preset time period, where the first preset time period is sent by the network device by using the unlicensed spectrum resource. The maximum channel occupancy time of the data is within the MCOT.

Specifically, the first preset time period is limited to the MCOT used by the network device for downlink transmission, so that the result evaluated based on the first channel evaluation criterion is more valuable for determining a subsequent channel evaluation criterion.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the processor is configured to evaluate the unlicensed spectrum by using the determined channel estimation criterion Whether the resource is idle or not is specifically:

The processor evaluates whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion during the first preset time period.

Specifically, it is timely to evaluate whether the unlicensed spectrum resource is idle through the newly determined channel evaluation standard, so that the evaluation result is more accurate.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the processor is Whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period is specifically:

Determining, by the processor, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit based on the first channel evaluation criterion in the first preset time period;

Determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and transmitting, by the output device, the unlicensed spectrum resource to the network device by using the output device when the unlicensed spectrum resource is idle The uplink data is specifically as follows:

And determining, by the processor, whether the unlicensed spectrum resource is idle on the scheduled second transmission time unit, based on the determined channel evaluation criterion, in the first preset time period, and evaluating the license-free And transmitting, by the output device, uplink data by using the unlicensed spectrum resource on the second transmission time unit when the spectrum resource is idle, the second transmission time unit being after the first transmission time unit.

With reference to the third aspect, or the first possible implementation of the third aspect, or the second possible implementation of the third aspect, or the third possible implementation of the third aspect, in the third aspect In four possible implementation manners, the determining, by the processor, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period is specifically:

The processor performs, at a first time period, a step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once.

Specifically, the final evaluation result is determined based on the result of the evaluation using the first channel evaluation criterion multiple times, and the error of the evaluation result is reduced.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the third aspect Four possible implementations, in a fifth possible implementation of the third aspect:

The channel determining criterion determined by the processor to determine the second channel evaluation criterion as to whether the unlicensed spectrum resource is idle is specifically:

Determining, by the processor, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

The channel determining criterion that the processor determines the third channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle is specifically:

The processor determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.

Specifically, an expiration date is set for the newly determined channel evaluation standard to prevent the terminal from easily preempting the unlicensed spectrum resource for a long time, or it is too difficult to grab the license-free spectrum resource for a long time, resulting in the license-free spectrum. The use of resources is unreasonable.

In some implementations of the first aspect, the second aspect, and the third aspect, the duration of the first preset time period is less than or equal to the maximum channel occupation duration MCOT.

Specifically, the duration of the first preset time period is limited to the MCOT, so that the result evaluated based on the first channel evaluation criterion is more valuable for determining subsequent channel evaluation criteria.

In some implementations of the first aspect, the second aspect, and the third aspect, the first transmission time unit is a first transmission time unit in which the terminal is scheduled.

Specifically, the time for evaluating whether the unlicensed spectrum resource is idle is limited to the first transmission time unit, so that the result evaluated based on the first channel evaluation criterion is more valuable for determining the subsequent channel evaluation standard.

In some implementations of the first aspect, the second aspect, and the third aspect, the first channel evaluation criterion, the second channel assessment criterion, and the third channel assessment criterion both include a channel contention window length and an energy gate. a limit value; estimating a probability that the unlicensed spectrum resource is idle based on a channel estimation criterion including a shorter channel contention window length included, or estimating based on a channel evaluation criterion including the energy threshold value included The probability that the unlicensed spectrum resource is idle is greater.

By implementing the embodiment of the present invention, the terminal determines the subsequent channel evaluation standard according to the result of the first channel evaluation criterion, and evaluates whether the unlicensed spectrum resource is idle through the newly determined channel evaluation criterion, so that the unlicensed spectrum resource is used. The use is more reasonable.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.

1 is a schematic flowchart of a method for evaluating an idle channel according to an embodiment of the present invention;

1A is a schematic diagram of a scenario of a first preset time period according to an embodiment of the present invention;

FIG. 1B is a schematic diagram of another scenario of a first preset time period according to an embodiment of the present invention; FIG.

FIG. 1C is a schematic diagram of another scenario of a first preset time period according to an embodiment of the present invention; FIG.

FIG. 1D is a schematic diagram of a scenario for transmitting uplink data according to an embodiment of the present disclosure;

1E is a schematic diagram of a scenario in which other devices are disclosed according to an embodiment of the present invention;

2 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of still another terminal according to an embodiment of the present invention.

detailed description

Embodiments of the present invention are applied to a system using an unlicensed spectrum resource, for example, a Licensed-Assisted Access (LAA)-LTE system (an LTE system in which a licensed band and an unlicensed band are used together by a CA method), Systems that use licensed and unlicensed bands together in a non-CA manner, systems that are deployed independently on unlicensed bands (for example, unlicensed spectrum) Standalone LTE system over unlicensed spectrum), Wireless Local Area Networks (WLAN), Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA) A system of technology, a system using Wideband Code Division Multiple Access (WCDMA) technology, and the like. The terminal described in the embodiment of the present invention is a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms of user equipment (User Equipment, UE), mobile station (MS), terminal equipment (Terminal Equipment), relay (Relay), and the like. The network device described in this embodiment of the present invention may receive uplink data sent by the terminal, and may also send downlink data to the terminal.

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, FIG. 1 is a schematic flowchart diagram of a channel estimation method according to an embodiment of the present invention. The method includes but is not limited to the following steps:

Step S101: The network device sends indication information to the terminal, indicating that the terminal sends uplink data by using the unlicensed spectrum resource.

Specifically, the indication information includes, but is not limited to, the uplink scheduling signaling, where the indication information is used as the uplink scheduling signaling, and the uplink scheduling signaling may indicate, in which transmission time units, the uplink data is sent. The transmission time unit may be an integer number of subframes, or an integer number of half subframes (half subframes may be regarded as one time slot), or an integer number of symbols, etc.; the uplink scheduling signaling further indicates that the terminal uses the unlicensed spectrum resource to send uplink. data. Taking the CA as an example, the network device may configure a plurality of serving cells, including a primary cell (PCell) and at least one secondary cell (SCell), wherein at least one cell transmits data using the unlicensed spectrum resource. The terminal includes transmitting uplink data through the unlicensed spectrum resource. The uplink scheduling signaling indicates that the terminal sends the uplink data by using the unlicensed spectrum resource. The uplink scheduling signaling indicates that the terminal transmits uplink data on a certain cell, and the working frequency band of the certain cell is an unlicensed spectrum resource. It should be noted that, instructing the terminal to send uplink data through the unlicensed spectrum resource does not mean that the terminal will send uplink data on the unlicensed spectrum resource, and whether to send uplink data depends on the foregoing first letter. The results of the evaluation of the standard assessment criteria.

Generally, when the network device indicates, by using the indication information, that the terminal uses the unlicensed spectrum resource to send uplink data, the other device does not use the unlicensed spectrum resource within the signal listening range of the network device.

Step S102: The terminal receives the indication information sent by the network device, and evaluates whether the unlicensed spectrum resource indicated by the uplink scheduling signaling is idle according to the first channel evaluation criterion in the first preset time period.

The specific process for the terminal to evaluate whether the unlicensed spectrum resource is idle may be: before the uplink data is sent by using the unlicensed spectrum resource indicated by the indication information, the contention window length defined in the current channel evaluation standard is q (q is greater than 1) Natural number), generate a random integer N from 1 to q, and then use the listening time slot as the granularity to detect whether the energy of the unlicensed spectrum resource reaches a preset energy threshold, and the energy per one time slot is lower than When the energy threshold is used, N is decremented by 1. On the contrary, N remains unchanged. When N is reduced to 0, it indicates that the unlicensed spectrum resource is idle. In the embodiment of the present invention, multiple channel evaluation standards are used to evaluate whether the unlicensed spectrum resource is idle before transmitting data through the unlicensed spectrum resource, and if the idle spectrum is sent, the data is sent; Different competition window lengths and/or energy thresholds can be derived based on the above description of whether the evaluation of the license-free evaluation resources is idle, and the channel estimation criteria with shorter defined competition window lengths evaluates the probability that the unlicensed spectrum resources are idle. Large (if other conditions are the same), or a channel estimation criterion with a defined energy threshold is greater, the probability that the license-free evaluation resource is idle is greater (if the other conditions are the same), the first channel evaluation criteria are the multiple One of the channel evaluation criteria. In the embodiment of the present invention, the channel evaluation criterion including the contention window length may also be understood as a channel evaluation criterion including a random back-off competition window. In addition, the terminal evaluates whether the unlicensed spectrum resource is idle, and may also adopt a channel evaluation criterion that does not include a random backoff contention window. For example, the terminal may determine whether the unlicensed spectrum resource is idle based on the interception result in a predefined time period. The defined time period may, for example, include an integer number of subtleties, such as a one-shot LBT mechanism.

Further, the contention window length may be the random contention window length described above, for example, N; or may be the maximum contention window length described above, for example, q; for example, the maximum contention window length q of several different service types is taken. The values may be 7, 15, 63, 1023, respectively, and then the competition window length in the embodiment of the present invention You can take q, or you can randomly take a value between 0~q or 1~q.

The foregoing first preset time period may be set according to actual needs. In an optional solution, before the terminal preempts the unlicensed spectrum resource (that is, whether the unlicensed spectrum resource is idle) for data transmission, the network The device preempts the unlicensed spectrum resource and sends downlink data through the unlicensed spectrum resource, where the first preset time period is within a Maximum Channel Occupied Time (MCOT) of the network device using the unlicensed spectrum resource or During the time range corresponding to the MCOT, the network device may use the unlicensed spectrum resource within the time range corresponding to the MCOT or the MCOT without determining whether the unlicensed spectrum resource is idle, for example, the network device determines the channel evaluation criterion. Whether the unlicensed spectrum resource is idle, if it is determined to be idle, the network device can use the unlicensed spectrum resource to transmit data and the maximum duration of using the unlicensed spectrum resource does not exceed the length of time corresponding to the MCOT, for example 2ms, or 3ms, or 8ms , or 10ms. It can be understood that the time range corresponding to the MCOT can be represented by the starting point of the time range corresponding to the MCOT and the length of the time range corresponding to the MCOT. The starting point of the time range corresponding to the MCOT may be that the network device preempts the unlicensed spectrum resource. At the time of transmitting data, the length of the time range corresponding to the MCOT may be the length corresponding to the MCOT, for example, an integer number of milliseconds. The network device may send downlink data by using the MCOT or part of the time range corresponding to the MCOT, where the terminal may be based on the first channel within the MCOT or the remaining time range within the time range corresponding to the MCOT. The evaluation criterion is to evaluate whether the unlicensed spectrum resource indicated by the uplink scheduling signaling is idle. The specific scenario is as shown in FIG. 1A. The maximum channel occupation time 111 of the unlicensed spectrum resource preempted by the network device includes the remaining time 112, and the terminal is in the Whether the unlicensed spectrum resource is free is evaluated based on the first channel evaluation criterion within the remaining time 112. In the embodiment of the present invention, the first preset time period may be the remaining time 112 of the example of FIG. 1A, or may be the time included in the remaining time 112 of the example of FIG. 1A.

The first preset time period may be defined by any two parameters of a start time of the first preset time period, an end time of the first preset time period, and a duration of the first preset time period. The end time of the first preset time period may be the end time of the MCOT, and the start time of the first preset time period may be the end time of the network device transmitting the downlink data on the unlicensed spectrum resource. The terminal can also pass the blind check The time range corresponding to the first preset time period is obtained by means of measurement, and/or network device indication, and/or standard protocol specification. Correspondingly, the time range corresponding to the first preset time period may be any two parameters of the start time of the first preset time period, the end time of the first preset time period, and the duration of the first preset time period. definition. Optionally, the network device may send the time range corresponding to the first preset time period to the terminal by using the indication information, including starting time of the first preset time period, end time of the first preset time period, and Any two parameters of the duration of a preset time period are sent to the terminal, and may be further limited in the embodiment of the present invention. For example, the network device sends the indication information to the terminal to indicate the end position of the MCOT, and the terminal determines, according to the network device, the end time of the downlink data transmission of the unlicensed spectrum resource (the end time may also be sent by the network device to send the indication information). The first preset time period. Alternatively, the terminal may determine a time range in which the first preset time period is located by determining a time range corresponding to the MCOT. The terminal may obtain the time range corresponding to the MCOT by means of blind detection, and/or network device indication, and/or standard protocol specification. The time range corresponding to the MCOT may be represented by any two of the start time of the time range corresponding to the MCOT, the end time of the time range corresponding to the MCOT, and the time range of the time range corresponding to the MCOT. The terminal may obtain the start time of the time range corresponding to the MCOT, the end time of the time range corresponding to the MCOT, and the duration of the time range corresponding to the MCOT by means of blind detection, and/or network device indication, and/or standard protocol specification. Any two parameters in the middle, in turn determine the time range corresponding to the MCOT. For example, the terminal may determine, by the blind detection, the starting time of the network device at the data transmission of the unlicensed spectrum resource, and according to the starting time, determine the start time of the time range corresponding to the MCOT, and then according to the network device indication and/or standard. The method of the protocol specification determines the time length corresponding to the MCOT (the duration of the time range corresponding to the MCOT), and then determines the time range corresponding to the MCOT corresponding to the data transmission of the network device on the unlicensed spectrum resource, and further determines the first The time range in which the preset time period is located. If the terminal determines, according to the uplink scheduling signaling, that the scheduled transmission time unit is within a time range in which the first preset time period is located or in a time range corresponding to the MCOT corresponding to the data transmission of the network device on the unlicensed spectrum resource, The terminal may evaluate whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, and further, after evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, Whether the unlicensed spectrum resource is idle based on the second channel evaluation criterion and/or the third channel evaluation criterion within the time range of the MCOT corresponding to the data transmission on the unlicensed spectrum resource.

In still another optional solution, the first preset time period is within a time range corresponding to a transmission opportunity (TXOP, Transmission Opportunity) of the network device using the unlicensed spectrum resource. In the TXOP, the network device may send downlink data and/or receive uplink data on the unlicensed spectrum resource. Before the TXOP, the network device needs to determine whether the unlicensed spectrum resource is idle through the channel evaluation standard. If idle, the network device may use the Unlicensed spectrum resources. In the TXOP, when the network device transmits data through the unlicensed spectrum resource, it is not necessary to determine the state (busy or idle) of the unlicensed spectrum resource based on the channel evaluation criterion. Optionally, the length of the time range corresponding to the TXOP is not greater than the length of the MCOT. The terminal may determine a range corresponding to the first preset time period by determining a time range corresponding to the TXOP. For a specific implementation manner in which the terminal determines the time range corresponding to the TXOP, the terminal may determine the time range corresponding to the MCOT. For example, the terminal may obtain the time range corresponding to the TXOP by means of blind detection, and/or network device indication, and/or standard protocol specification. The time range corresponding to the TXOP may be represented by any two of the start time of the time range corresponding to the TXOP, the end time of the time range corresponding to the TXOP, and the time range of the time range corresponding to the TXOP. The terminal may obtain the start time of the time range corresponding to the TXOP, the end time of the time range corresponding to the TXOP, and the duration of the time range corresponding to the TXOP by means of blind detection, and/or network device indication, and/or standard protocol specification. Any two parameters in the middle, and then determine the time range corresponding to the TXOP. For example, the terminal may determine, by the blind detection, the starting time of the network device in the data transmission of the unlicensed spectrum resource, according to the starting time, the start time of the time range corresponding to the TXOP may be determined, and then according to the network device indication and/or standard. The method of the protocol specification determines the time length corresponding to the TXOP, and then determines the time range of the TXOP corresponding to the data transmission of the network device on the unlicensed spectrum resource, and further determines the time range in which the first preset time period is located. If the terminal determines, according to the uplink scheduling signaling, that the scheduled transmission time unit is within a time range of the TXOP corresponding to the data transmission of the network device on the unlicensed spectrum resource, the terminal may evaluate the license-free based on the first channel evaluation criterion. Whether the spectrum resource is idle, and further, after evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, the network device may also be in the license-free spectrum Within the time range of the TXOP corresponding to the data transmission on the resource, whether the unlicensed spectrum resource is free is evaluated based on the second channel evaluation criterion and/or the third channel evaluation criterion.

In another optional solution, the duration of the first preset time period is equal to the maximum channel occupation time MCOT corresponding to the terminal (the MCOT size defined in different devices may be different); the starting point of the first preset time period The time at which the network device ends the downlink data transmission on the unlicensed spectrum resource is as shown in FIG. 1B. The duration of the first preset time period 113 is equal to the MCOT in the terminal. In this case, the terminal needs to determine the end time (which can be indicated by the network device) that the network device sends the downlink data on the unlicensed spectrum resource, and the terminal can determine the length of the MCOT according to the indication of the network device or a standard protocol. Determining the first preset time period. Or the starting point of the first preset time period is a starting point of the Nth transmission time unit that is scheduled after the network device ends the downlink data transmission on the unlicensed spectrum resource, where N is a natural number, when N= At 1 o'clock, the specific scene is shown in Figure 1C. In this case, the terminal may determine, according to the indication message sent by the network device, the end time of the downlink data sent by the network device on the unlicensed spectrum resource, and the terminal determines the location of the uplink scheduled transmission time unit according to the indication of the network device. The terminal may determine the starting point of the first preset time period according to the end time of the downlink data transmission and the determined location of the uplink scheduled transmission time unit, and then determine the length of the MCOT according to the indication of the network device or a standard protocol, and further Determining a transmission duration corresponding to the first preset time period. It should be noted that, in this case, the terminal may evaluate whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion before the first transmission time unit included in the first preset time period. In addition, it should be noted that in this case, there is no need for uplink data transmission in the scheduled transmission time unit, which depends on the evaluation result of the channel evaluation standard. Or the starting point of the first preset time period is a starting point of the transmission unit corresponding to the Mth data transmission of the terminal after the network device ends the downlink data transmission on the unlicensed spectrum resource, where M is a natural number. Here, the Mth data transmission includes the Mth data transmitted by the terminal on the transmission time unit of the unlicensed spectrum resource; when M=1, if the terminal determines the first transmission time in the first transmission time unit If the unlicensed spectrum resource corresponding to the unit is idle, the terminal may use the unlicensed spectrum resource to send the uplink data in the first transmission time unit. The starting point of the first transmission time unit corresponds to the Mth data transmission in this example. The starting point of the transmission unit, taking FIG. 1C as an example, assuming that M=1, if the terminal determines that data can be transmitted in subframe 1 according to the channel estimation criterion, the starting point of subframe 1 corresponds to the transmission unit corresponding to the first data transmission. Starting point; if the terminal determines according to the channel estimation criterion that data cannot be transmitted in subframe 1 but data can be transmitted in subframe 2, the starting point of subframe 2 corresponds to the starting point of the transmission unit corresponding to the first data transmission. The determination method is the same as the foregoing, and will not be described here.

In still another optional solution, the duration of the first preset time period is equal to the duration of the transmission time unit in which the terminal is continuously scheduled. For example, if the network device continuously sends one or two indication information to indicate that the terminal transmits data on two consecutive transmission time units of the unlicensed spectrum resource, the terminal may use the total duration of the continuous transmission time unit as the first The duration of a preset time period. The starting point of the first preset time period may be an end time of ending the downlink data transmission by the network device on the unlicensed spectrum resource or a starting point of the Kth transmission time unit scheduled by the terminal, where K is a natural number.

Further, the process for the terminal to evaluate whether the unlicensed spectrum resource indicated by the indication information is idle based on the first channel evaluation criterion in the first preset time period may include the following two situations:

In the first case, the terminal evaluates whether the unlicensed spectrum resource is idle in the scheduled first transmission time unit based on the first channel evaluation criterion in the first preset time period, that is, the terminal is in the first When the uplink data is sent by the first transmission time unit according to the uplink scheduling in the preset time period, it is evaluated whether the unlicensed spectrum resource is idle, and the first transmission time unit is the first transmission in the first preset time period of the uplink scheduling. The time unit is not limited herein. Preferably, the first transmission time unit is the first scheduled transmission time unit in the first preset time period.

The second case: the terminal performs, at the first preset time period, the step of evaluating whether the unlicensed spectrum resource is idle on the scheduled different transmission time units based on the first channel evaluation criterion at least twice. Specifically, the first preset time period has a plurality of uplink scheduled transmission time units, and the terminal evaluates the idle state of the unlicensed spectrum resource before transmitting the uplink data in one transmission time unit, and the terminal according to at least The results of the two evaluations determine if the unlicensed spectrum resource is free. For example, there are three scheduled subframes (transmission time units) in the first preset time period, before the terminal sends the uplink data in the first subframe, before the uplink data is sent in the second subframe, and the third subframe Frame transmission Before the line data, the idle state of the unlicensed spectrum resource is evaluated. Then, the unlicensed spectrum can be determined by combining the result of the evaluation before the uplink data is sent by the subframe 1 and the evaluation result before the uplink data is sent by the subframe 2. Whether the resource is idle or not, and if the result of evaluating that the unlicensed spectrum resource is idle exceeds a preset ratio, the unlicensed spectrum resource is considered to be idle. It should be noted that combining the evaluation results corresponding to multiple transmission time units to determine whether the unlicensed spectrum resources are idle is only a means for adjusting the subsequent channel evaluation criteria, and does not mean that the evaluation corresponding to multiple transmission time units is used. As a result, it is determined whether uplink data can be transmitted in each transmission time unit. Taking the above content as an example, if there are three scheduled subframes in the first preset time period, if the evaluation result before transmitting the uplink data through the subframe 1 is to determine that the evaluated unlicensed spectrum resource is idle, the sub-frame can be passed. The frame 1 transmits the uplink data; if the evaluation result before the uplink data is transmitted through the subframe 2 is to determine that the evaluated unlicensed spectrum resource is idle, the uplink data may be transmitted through the subframe 2. At the same time, it is also possible to consider whether the unlicensed spectrum resource is free based on the evaluation result before transmitting the uplink data through the subframe 1 and before transmitting the uplink data through the subframe 2.

Optionally, when the evaluation results corresponding to the multiple transmission time units are utilized, the weights of the evaluation results corresponding to each transmission time unit may be the same or different in the comprehensive consideration result. The terminal may determine the weight of the evaluation result corresponding to each transmission time unit according to the distance from the end time at which the network device transmits the downlink data through the unlicensed spectrum resource. For example, the evaluation result corresponding to the transmission time unit which is closer to the end position of the downlink data transmission end of the unlicensed spectrum resource is larger in weight in the integrated result, otherwise it is smaller. As shown in FIG. 1D, the weight of the evaluation result in the time period 122 is higher than the evaluation result in the time period 123, the weight of the evaluation result in the time period 123 is higher than the evaluation result in the time period 124, and the evaluation in the time period 122 As a result, the evaluation results in the time period 123 and the evaluation results in the time period 124 are combined according to the respective weights, and the result is a final result of evaluating whether the unlicensed spectrum resource is free.

If it is determined that the unlicensed spectrum resource indicated by the indication information is idle based on the first channel evaluation criterion in the first preset time period, step S103 is performed; or

If it is estimated that the unlicensed spectrum resource indicated by the indication information is not idle based on the first channel evaluation criterion in the first preset time period, step S104 is performed.

Step S103: Determine the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle.

Specifically, the terminal determines, as a second channel evaluation criterion, a channel evaluation criterion used to evaluate whether the unlicensed spectrum resource is idle, so that the terminal can subsequently pass the second channel when re-evaluating whether the unlicensed spectrum resource is idle. Evaluating the criteria for evaluation; the terminal estimates the probability that the unlicensed spectrum resource is idle by the second channel evaluation criterion, and is not less than the probability that the unlicensed spectrum resource is idle by the first channel evaluation criterion, specifically, for example, when When the contention window length defined in the second channel evaluation criterion is shorter than the contention window length defined in the first channel evaluation criterion, or when the energy threshold value defined in the second channel evaluation criterion is greater than the first channel evaluation When the energy threshold defined in the standard is larger, the second channel evaluation criterion is greater than the probability that the unlicensed spectrum resource is idle by the first channel evaluation criterion. When the contention window length and the energy threshold in the first channel evaluation criterion and the second channel evaluation criterion are the same, the probability that the unlicensed spectrum resource is idle is estimated by the second channel evaluation criterion and the first channel evaluation criterion. .

It should be noted that, in the embodiment of the present invention, the probability that the unlicensed spectrum resource is idle is estimated based on the second channel evaluation criterion is not less than that that the unlicensed spectrum resource is idle based on the first channel evaluation criterion. The probability that the technical feature to be expressed includes that the second channel evaluation criterion includes a more relaxed evaluation parameter setting, for example, a shorter listening duration and/or a larger energy threshold may be employed, the first channel evaluation criterion The included evaluation parameter setting is the same as the evaluation parameter setting included in the second channel evaluation criterion, or the evaluation parameter setting included in the first channel evaluation criterion is compared with the evaluation parameter setting included in the second channel evaluation criterion. More stringent, for example, the first channel evaluation criteria include an evaluation parameter that requires a longer listening duration and/or a smaller energy threshold than the second channel evaluation criteria. It can be understood that “the probability that the unlicensed spectrum resource is idle based on the second channel evaluation criterion is not less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion” may be understood as The second channel evaluation criterion includes a listening duration that is not greater than (less than or equal to) the listening duration included in the first channel evaluation criterion, and/or the energy threshold included in the second channel assessment criterion is not Less than (less than or greater than) the energy threshold included in the first channel evaluation criteria. For example, the first channel evaluation criterion may be no The LBT mechanism includes a random back-off contention window, and the second channel evaluation criterion may be the same as the first channel evaluation criterion. Optionally, the first channel evaluation criterion and the second channel evaluation criterion both adopt a one-shot LBT (an LBT mechanism that does not include a random backoff contention window). For another example, the first channel evaluation criterion and the second channel evaluation criterion are both LBT mechanisms including a random backoff contention window, but the contention window length of the first channel evaluation criterion is equal to or greater than the second channel. Evaluate the standard competition window length.

In an optional solution, the determining, by the second channel evaluation criterion, a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle comprises: determining a second channel evaluation criterion as an evaluation within a second preset time period a channel evaluation criterion for whether the unlicensed spectrum resource is idle; that is, after determining that the second channel evaluation criterion is a new channel evaluation criterion, the second channel evaluation criterion may be based on the second preset time period. To evaluate whether the above unlicensed spectrum resource is idle, and whether the above unlicensed spectrum resource is idle may not be evaluated based on the second channel evaluation criterion outside the second preset time period. Further, the second preset time period may be determined according to actual needs, and is not limited herein. Optionally, the downlink data transmission of the network device on the unlicensed spectrum resource is included between the second preset time period and the first preset time period.

It should be noted that before the network device sends the downlink data through the unlicensed spectrum resource, the idle state of the unlicensed spectrum resource is evaluated, and the unlicensed spectrum resource is idle (ie, the signal at the network device is evaluated). The downlink data is sent through the unlicensed spectrum resource when no other device in the listening range uses the unlicensed spectrum resource, and the network device can communicate with the network device during the process of sending the downlink data through the unlicensed spectrum resource. The device does not use the unlicensed spectrum resource to transmit data; therefore, if the terminal detects that the unlicensed spectrum resource is idle when the network device transmits the downlink data through the unlicensed spectrum resource, it indicates that there is no vicinity of the terminal. The device uses the unlicensed spectrum resource. In this case, the terminal can use the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, so that the terminal can preempt the unlicensed spectrum in time for uplink scheduling. Resources.

Step S104: Determine the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle.

Specifically, the terminal determines, as a third channel evaluation criterion, a channel evaluation criterion used to evaluate whether the unlicensed spectrum resource is idle, so that the terminal can subsequently pass the third channel when reevaluating whether the unlicensed spectrum resource is idle. Evaluating the criteria to evaluate; the terminal estimates the probability that the unlicensed spectrum resource is idle through the third channel evaluation criterion, and the probability of the unlicensed spectrum resource being idle is estimated to be smaller than the first channel evaluation criterion, specifically, the third When the contention window length defined in the channel evaluation standard is longer than the contention window length defined in the first channel evaluation criterion, or the energy threshold value defined in the second channel evaluation criterion is greater than that defined in the first channel evaluation criterion When the energy threshold is smaller, the third channel evaluation criterion is smaller than the probability that the unlicensed spectrum resource is idle by the first channel evaluation criterion;

It should be noted that, in the embodiment of the present invention, the probability that the unlicensed spectrum resource is idle based on the third channel evaluation criterion is less than that that the unlicensed spectrum resource is idle based on the first channel evaluation criterion. Probability, the technical feature to be expressed is that the evaluation parameter setting in the third channel evaluation criterion is more strict, for example, a longer listening duration and/or a larger energy threshold may be adopted, the first channel evaluation criterion evaluation The evaluation parameter setting is more relaxed than the evaluation parameter setting in the third channel evaluation criterion, for example, the first channel evaluation criterion needs to adopt a shorter listening duration and/or more than the third channel evaluation criterion. Large energy threshold. It can be understood that “the probability that the unlicensed spectrum resource is idle based on the third channel evaluation criterion is less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion” may be understood as: The third channel evaluation criterion includes a listening duration greater than a listening duration included in the first channel assessment criterion, and/or the third channel assessment criterion includes an energy threshold that is less than the first channel assessment criterion includes Energy threshold". For example, the first channel evaluation criterion may be an LBT mechanism that does not include a random back-off contention window, and the third channel evaluation criterion is an LBT mechanism including a random back-off contention window. Optionally, the first channel evaluation criterion is a one shot LBT mechanism (the LBT mechanism that does not include a random back-off competition window), and the third channel evaluation criterion is a normal LBT mechanism (including an LBT mechanism of a random back-off competition window). For another example, the first channel evaluation criterion and the third channel evaluation criterion are both LBT mechanisms including a random back-off competition window, but the contention window length of the first channel evaluation criterion is smaller than the third channel evaluation criterion. The competition window is long.

In an optional solution, the determining, by the third channel evaluation criterion, a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle comprises: determining a third channel evaluation criterion as an evaluation within a third preset time period a channel evaluation criterion for whether the unlicensed spectrum resource is idle; that is, after determining that the third channel evaluation criterion is a new channel evaluation criterion, the third channel evaluation criterion may be based on the third preset time period. To evaluate whether the above unlicensed spectrum resource is idle, and whether the above unlicensed spectrum resource is idle may not be evaluated based on the third channel evaluation criterion outside the third preset time period. Further, the third preset time period may be determined according to actual needs, and is not limited herein. Optionally, the downlink data transmission of the network device on the unlicensed spectrum resource is included between the third preset time period and the first preset time period.

It should be noted that, before the network device sends the downlink data sent by using the unlicensed spectrum resource, the idle state of the unlicensed spectrum resource is evaluated, and the unlicensed spectrum resource is idle (ie, the signal at the network device is evaluated). The downlink data is sent through the unlicensed spectrum resource when no other device in the listening range uses the unlicensed spectrum resource, and the network device can communicate with the network device during the process of sending the downlink data through the unlicensed spectrum resource. The device does not use the unlicensed spectrum resource to send data; therefore, if the terminal detects that the unlicensed spectrum resource is not idle when the network device sends the downlink data through the unlicensed spectrum resource, it indicates that the terminal has a nearby A device that is not in the signal listening range of the network device is using the unlicensed spectrum resource. If the terminal further uses a channel evaluation criterion that is easier to evaluate whether the unlicensed spectrum resource is idle, the unlicensed spectrum resource is caused. The use is very unfair.

FIG. 1E is a schematic diagram of a scenario in which other devices are provided according to an embodiment of the present invention; wherein the terminal 131 is within the signal listening range 134 of the base station (network device) 132 and the signal listening range 135 of the other device 133, and the base station 132 is not in the other The signal listening range of the device 133 is within the signal listening range of the terminal 131, and the other device 133 is not in the signal listening range of the base station 132 but within the signal listening range of the terminal 131, when the base station 132 passes the unlicensed spectrum resource. When the downlink data transmission is ended, no device will transmit data using the unlicensed spectrum resource within the signal listening range 134 of the base station 132, but other devices 133 may be using the unlicensed spectrum resource to transmit data. If the terminal 131 subsequently uses the first channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle (ie, preempt the unlicensed spectrum) Resource), it is unfair to use the other device 133 to assess whether the unlicensed spectrum resource is idle. Especially when the other device 133 and the terminal 131 are not in the same service system (that is, there is no uplink data and downlink data transmission between the other device 131 and the terminal 131, and are not scheduled by the same network device), the license is exempted. Unfair use of spectrum resources is more pronounced.

For the above reasons, when the terminal evaluates that the unlicensed spectrum resource is not idle by using the foregoing first channel evaluation criterion, determining that the third channel evaluation criterion is a channel evaluation criterion for subsequently evaluating whether the unlicensed spectrum resource is idle, so that the terminal and the terminal The use of this unlicensed spectrum resource by this other device is as fair as possible.

Step S105: The terminal evaluates whether the unlicensed spectrum resource is idle by using the determined channel evaluation criterion, and sends uplink data by using the unlicensed spectrum resource when evaluating that the unlicensed spectrum resource is idle.

Specifically, after the terminal newly determines the new channel evaluation standard by using the step S103 or S104, if the uplink data needs to be sent, whether the unlicensed spectrum resource is idle or not is determined by using the newly determined channel evaluation criterion before transmitting the uplink data. The uplink data is sent through the unlicensed spectrum resource. It should be noted that, in the embodiment of the present invention, sending uplink data by using the unlicensed spectrum resource includes transmitting the uplink data by using part of the frequency in the unlicensed spectrum resource or all frequencies.

In an optional solution, when the terminal needs to send uplink data in a new transmission time unit, and the new transmission time unit is within the first preset time period, send the new transmission time unit. The uplink data is previously used to evaluate whether the unlicensed spectrum resource is idle by the newly determined channel evaluation standard, and if idle, the uplink data is sent through the unlicensed spectrum resource on the new time transmission unit.

For example, the transmission time unit of the terminal is scheduled from the chronological order to the subframe 1, the subframe 2, and the subframe 3, and the subframe 1, the subframe 2, and the subframe 3 are all in the first preset time period; The terminal evaluates whether the unlicensed spectrum resource is idle by using the first channel evaluation criterion before transmitting the uplink data on the subframe 1, and after determining the second channel evaluation criterion according to the result of the evaluation, before sending the uplink data on the subframe 2, or Whether the unlicensed spectrum resource is free can be evaluated by the second channel evaluation criterion before the uplink data is transmitted on the subframe 3.

FIG. 1D is a schematic diagram of a scenario in which a terminal sends uplink data according to an embodiment of the present invention; after determining that the unlicensed spectrum resource is idle or preempting the unlicensed spectrum resource in the time period 121, the network device sends downlink data through the unlicensed spectrum resource. After receiving the uplink scheduling signaling sent by the network device, the terminal needs to send uplink data in subframe 1, subframe 2, and subframe 3 according to the indication of the uplink scheduling signaling, where the terminal sends the subframe 1 Whether the unlicensed spectrum resource is available in the time period 122 is determined by the first channel evaluation criterion, and when the second channel evaluation criterion is determined according to the result of the evaluation, when the uplink data is transmitted on the subframe 2, the time period 123 is adopted. The second channel evaluation criterion evaluates whether the unlicensed spectrum resource is idle; when the uplink data is transmitted on the subframe 3, the second channel evaluation criterion can also be used to evaluate whether the unlicensed spectrum resource is idle.

In still another optional solution, when the terminal needs to send uplink data in a new transmission time unit, and the new transmission time unit is the first transmission time unit after determining the new channel evaluation criterion, And determining, by using the newly determined channel evaluation criterion, whether the unlicensed spectrum resource is idle before transmitting the uplink data in a new transmission time unit, and if the idle time, transmitting the uplink data by using the unlicensed spectrum resource on the new time transmission unit. .

For example, the scheduled transmission time unit of the terminal is subframe 1, subframe 2, and subframe 3 in time series; the terminal evaluates the unlicensed spectrum resource by using the first channel evaluation criterion before transmitting the uplink data on the subframe 1. After the second channel evaluation criterion is determined according to the result of the evaluation, before the uplink data is sent on the subframe 2, the second channel evaluation criterion may be used to evaluate whether the unlicensed spectrum resource is idle. Before the uplink data is transmitted on the subframe 3, the channel evaluation criterion used to evaluate whether the unlicensed spectrum resource is idle may not be the second channel evaluation criterion. Referring also to FIG. 1D, the determined second channel evaluation criterion is used to evaluate whether the unlicensed spectrum resource is idle during time period 123, and the channel evaluation criteria used to evaluate whether the unlicensed spectrum resource is idle during time period 124 is not limited herein. Alternatively, the channel evaluation criteria used by the time period 124 may be determined based on an evaluation result of evaluating whether the unlicensed spectrum resource is idle during the time period 123.

It should be noted that, in the embodiment of the present invention, in a plurality of transmission time units included in the first preset time period, the terminal may determine, adjacent to and subsequent to the channel evaluation standard corresponding to each transmission time unit. The channel evaluation standard corresponding to the transmission time unit. The transmission time unit of the terminal is scheduled from The time sequence is followed by subframe 1, subframe 2, and subframe 3. The terminal evaluates whether the unlicensed spectrum resource is idle by using the first channel evaluation criterion before transmitting the uplink data on the subframe 1. If it is idle, the second channel evaluation criterion may be used to evaluate the uplink data before the subsequent transmission of the uplink data in the subframe 2. Whether the license-free spectrum resource is idle. In an optional solution, the second channel evaluation criterion is a first channel evaluation criterion, and the terminal still evaluates whether the unlicensed spectrum resource is idle through the first channel evaluation criterion before sending the uplink data on the subframe 2, if idle, Then, the first channel evaluation criterion is still the channel evaluation criterion corresponding to the subsequent subframe (for example, subframe 3).

It should be noted that, when the terminal sends the uplink data in a certain subframe (transmission time unit), the uplink data is sent on all or part of the Orthogonal Frequency Division Multiplexing (OFDM) symbol of the subframe; The process of evaluating whether the unlicensed spectrum resource is idle before the uplink data may be after the previous subframe of the subframe, or within the previous subframe, or before the previous subframe, and at what time, according to actual needs. The setting is not limited by the present invention.

It should be noted that, in the embodiment of the present invention, the terminal may determine the second preset time period and/or the third preset time period according to the network device indication, and the terminal may also determine the second preset time period according to the preset rule. / or third preset time period.

In the method embodiment shown in FIG. 1, the terminal determines a subsequent channel evaluation criterion according to the result of the first channel evaluation criterion, and evaluates whether the unlicensed spectrum resource is idle through the newly determined channel estimation criterion, so that the terminal The use of unlicensed spectrum resources is more reasonable.

The method of the embodiment of the present invention is described in detail above based on FIG. 1. In order to facilitate the implementation of the solution of the embodiment of the present invention, the device of the embodiment of the present invention is described in detail below with reference to FIGS. 2 and 3.

FIG. 2 is a schematic structural diagram of a terminal 20 according to an embodiment of the present invention; the terminal 20 includes a first evaluation unit 201, a determining unit 202, and a second evaluating unit 203, and detailed descriptions of the units are as follows:

The first evaluation unit 201 is configured to evaluate, according to the first channel evaluation criterion, whether the unlicensed spectrum resource is idle during the first preset time period;

The determining unit 202 is configured to determine, when the result of the first evaluation unit 201 is idle, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or When the result of the evaluation by the evaluation unit 201 is idle, the terminal determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, wherein the exemption is evaluated based on the second channel evaluation criterion. The probability that the licensed spectrum resource is idle is not less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, and the probability that the unlicensed spectrum resource is idle is estimated to be less than the basis based on the third channel evaluation criterion Determining, by the first channel evaluation criterion, a probability that the unlicensed spectrum resource is idle;

The second evaluation unit 203 is configured to evaluate, by using the channel evaluation criterion determined by the determining unit 202, whether the unlicensed spectrum resource is idle, and use the unlicensed spectrum resource to the network device when evaluating that the unlicensed spectrum resource is idle. Send upstream data.

In an optional solution, the duration of the first preset time period is less than or equal to the maximum channel occupation duration MCOT.

In still another optional solution, the terminal 20 further includes:

a receiving unit, configured to receive, before the first evaluation unit 201, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, the indication message sent by the network device, the indication message And the information about the unlicensed spectrum resource and the information of the first preset time period, where the maximum preset channel time of the downlink data is sent by the network device by using the unlicensed spectrum resource Inside.

In still another optional solution, the second evaluation unit 203, by using the channel evaluation criterion determined by the determining unit 202, whether the unlicensed spectrum resource is idle is specifically:

The second evaluation unit 203 evaluates whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion within the first preset time period.

In still another optional solution, the first evaluation unit 201 is specifically configured to: during the first preset time period, evaluate the unlicensed spectrum resource based on the first channel evaluation criterion on the scheduled first transmission time unit. Whether it is free;

The second evaluation unit 203 is specifically configured to determine, based on the determining, within the first preset time period a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle on a scheduled second transmission time unit, and passing the license exemption on the second transmission time unit when evaluating that the unlicensed spectrum resource is idle The spectrum resource transmits uplink data, and the second transmission time unit is after the first transmission time unit.

In still another optional solution, the first transmission time unit is a first transmission time unit in which the terminal 20 is scheduled.

In still another optional solution, the first evaluating unit 201 is specifically configured to perform, at the first preset time period, the step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once.

In still another optional solution, the determining unit 202 determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

The determining unit 202 determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

The determining unit 202 determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

The determining unit 202 determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.

In still another optional aspect, the first channel evaluation criterion, the second channel evaluation criterion, and the third channel evaluation criterion both include a channel contention window length and an energy threshold; A channel evaluation criterion having a shorter channel competition window length estimates that the probability of the unlicensed spectrum resource being idle is greater, or that the unlicensed spectrum resource is idle based on a channel estimation criterion including the energy threshold value that is included The probability is greater.

It should be noted that the specific implementation of the terminal 20 in the embodiment of FIG. 2 may correspond to the corresponding description of the method embodiment shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of still another terminal 30 according to an embodiment of the present invention; the terminal 30 may include an output device 301, a memory 302, and a processor 303 (the processor 303 may be one or For example, the output device 301, the memory 302, and the processor 303 are respectively connected to the bus 304. The memory 302 stores a set of program codes for evaluating the free channel, and the processor 303 is used by the processor 303. The program code of the idle channel evaluation stored in the memory 302 is called to perform the following operations:

Evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period;

If idle, determining the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or, if not idle, determining the third channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle Channel estimation criteria, wherein the probability of evaluating the unlicensed spectrum resource idle based on the second channel evaluation criterion is not less than a probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, based on The third channel evaluation criterion estimates that the probability of the unlicensed spectrum resource being idle is less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion;

And determining, by the determined channel evaluation criterion, whether the unlicensed spectrum resource is idle, and transmitting, by using the output device, the uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle.

In an optional solution, the duration of the first preset time period is less than or equal to the maximum channel occupation duration MCOT.

In still another optional solution, the terminal 30 further includes an input device; the processor 303 is further configured to: before the first channel estimation criterion is used to evaluate whether the unlicensed spectrum resource is idle before the first preset time period Receiving, by the input device, an indication message sent by the network device, where the indication message includes information about the unlicensed spectrum resource and information of the first preset time period, where the first preset time period is The network device uses the unlicensed spectrum resource to transmit the maximum channel occupation time MCOT of the downlink data.

In still another optional solution, the processor 303, by using the determined channel estimation criterion, whether the unlicensed spectrum resource is idle is specifically:

The processor 303 passes the determined channel evaluation criterion in the first preset time period Evaluate whether the unlicensed spectrum resource is free.

In still another optional solution, the determining, by the processor 303, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period is specifically:

The processor 303, according to the first channel evaluation criterion, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit in the first preset time period;

The processor 303, by using the determined channel evaluation criterion, whether the unlicensed spectrum resource is idle, and passing the unlicensed spectrum resource to the network through the output device 301 when evaluating that the unlicensed spectrum resource is idle The device sends uplink data specifically as follows:

The processor 303, during the first preset time period, whether the unlicensed spectrum resource is idle on the scheduled second transmission time unit, based on the determined channel evaluation criterion, and evaluating the exemption And transmitting, by the output device 301, uplink data by using the unlicensed spectrum resource on the second transmission time unit when the licensed spectrum resource is idle, the second transmission time unit being after the first transmission time unit.

In still another optional solution, the first transmission time unit is a first transmission time unit in which the terminal 30 is scheduled.

In still another optional solution, the determining, by the processor 303, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period is specifically:

The processor 303 performs a step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once within the first preset time period.

In still another optional solution, the determining, by the processor 303, the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle is:

The processor 303 determines a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

The channel evaluation criterion that the processor 303 determines the third channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle is specifically:

The processor 303 determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.

In still another optional aspect, the first channel evaluation criterion, the second channel evaluation criterion, and the third channel evaluation criterion both include a channel contention window length and an energy threshold; A channel evaluation criterion having a shorter channel competition window length estimates that the probability of the unlicensed spectrum resource being idle is greater, or that the unlicensed spectrum resource is idle based on a channel estimation criterion including the energy threshold value that is included The probability is greater.

It should be noted that the specific implementation of the terminal 30 in the embodiment of FIG. 3 may correspond to the corresponding description of the method embodiment shown in FIG. 1 .

In summary, by implementing the embodiment of the present invention, the terminal determines the subsequent channel evaluation standard according to the result of the first channel evaluation criterion, and evaluates whether the unlicensed spectrum resource is idle through the newly determined channel evaluation standard, so that The use of this license-free spectrum resource is more reasonable.

Claims (27)

1. A method for evaluating an idle channel, comprising:

   The terminal evaluates whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period;

   If idle, the terminal determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or, if not idle, determining, by the terminal, the third channel evaluation criterion as the evaluation A channel evaluation criterion for whether the unlicensed spectrum resource is idle, wherein the probability of the unlicensed spectrum resource being idle based on the second channel evaluation criterion is not less than the estimated unlicensed spectrum resource based on the first channel evaluation criterion a probability of being idle, estimating, based on the third channel evaluation criterion, that the probability of the unlicensed spectrum resource being idle is less than a probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion;

   And determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and transmitting uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle.
2. The method according to claim 1, wherein the duration of the first preset time period is less than or equal to the maximum channel occupation time length MCOT.
3. The method according to claim 1, wherein the method further comprises: before the determining, by the terminal, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period, the method further comprising:

   Receiving, by the terminal, an indication message sent by the network device, where the indication message includes information about the unlicensed spectrum resource and information of the first preset time period, where the first preset time period is in the network The device uses the unlicensed spectrum resource to transmit the maximum channel occupation time MCOT of the downlink data.
4. The method according to any one of claims 1 to 3, wherein the terminal passes through Determining whether the unlicensed spectrum resource is free is determined by the determined channel evaluation criteria:

   And determining, by the terminal, whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion in the first preset time period.
5. The method according to any one of claims 1 to 4, wherein the evaluating, by the terminal, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period comprises:

   Determining, by the terminal, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit according to the first channel evaluation criterion in the first preset time period;

   And determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and sending the uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle:

   And determining, by the terminal, whether the unlicensed spectrum resource is idle in the scheduled second transmission time unit, based on the determined channel evaluation criterion, in the first preset time period, and evaluating the license-free spectrum The uplink data is sent by the unlicensed spectrum resource on the second transmission time unit when the resource is idle, and the second transmission time unit is after the first transmission time unit.
6. The method according to claim 5, wherein the first transmission time unit is a first transmission time unit in which the terminal is scheduled.
7. The method according to any one of claims 1 to 6, wherein the determining, by the terminal, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period comprises:

   The terminal performs a step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once in the first preset time period.
8. A method according to any one of claims 1 to 7, wherein:

   The channel evaluation criteria for determining, by the terminal, the second channel evaluation criterion to evaluate whether the unlicensed spectrum resource is idle includes:

   Determining, by the terminal, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

   The terminal determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

   The terminal determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.
9. The method according to any one of claims 1 to 8, wherein the first channel evaluation criterion, the second channel evaluation criterion, and the third channel evaluation criterion both include a channel contention window length and an energy gate. a limit value; estimating a probability that the unlicensed spectrum resource is idle based on a channel estimation criterion including a shorter channel contention window length included, or estimating based on a channel evaluation criterion including the energy threshold value included The probability that the unlicensed spectrum resource is idle is greater.
10. A terminal, comprising:

    a first evaluation unit, configured to evaluate, according to the first channel evaluation criterion, whether the unlicensed spectrum resource is idle during the first preset time period;

    a determining unit, configured to determine, when the first evaluation unit evaluates that the result is idle, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle; or When the result of the evaluation unit evaluation is idle, the terminal determines a third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, wherein the unlicensed spectrum is evaluated based on the second channel evaluation criterion. The probability that the resource is idle is not less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, and the probability that the unlicensed spectrum resource is idle based on the third channel evaluation criterion is less than A channel evaluation criterion estimates the probability that the unlicensed spectrum resource is idle;

    a second evaluation unit, configured to: determine, by the channel evaluation criterion determined by the determining unit, whether the unlicensed spectrum resource is idle, and send, by using the unlicensed spectrum resource, to the network device when evaluating that the unlicensed spectrum resource is idle Upstream data.
11. The terminal according to claim 10, wherein the duration of the first preset time period is less than or equal to the maximum channel occupation time length MCOT.
12. The terminal according to claim 10, wherein the terminal further comprises:

    a receiving unit, configured to receive, after the first evaluation unit, whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion, the indication message sent by the network device, where the indication message includes The information of the unlicensed spectrum resource and the information of the first preset time period, the first preset time period is within a maximum channel occupation time MCOT of the network device using the unlicensed spectrum resource to send downlink data .
13. The terminal according to any one of claims 10 to 12, wherein the second evaluation unit evaluates whether the unlicensed spectrum resource is idle by using a channel evaluation criterion determined by the determining unit:

    The second evaluation unit evaluates whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion within the first preset time period.
14. The terminal according to any one of claims 10 to 13, wherein

    The first evaluation unit is configured to: during the first preset time period, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit based on the first channel evaluation criterion;

    The second evaluation unit is configured to: during the first preset time period, whether the unlicensed spectrum resource is idle on the scheduled second transmission time unit, based on the determined channel estimation criterion, and Evaluating, when the unlicensed spectrum resource is idle, transmitting uplink data by using the unlicensed spectrum resource on the second transmission time unit, where the second transmission time unit is after the first transmission time unit.
15. The terminal according to claim 14, wherein said first transmission time unit The first transmission time unit that is scheduled for the terminal.
16. The terminal according to any one of claims 10 to 15, wherein the first evaluation unit is specifically configured to perform, according to the first channel evaluation criterion, whether the unlicensed spectrum resource is idle according to the first preset time period. Step at least once.
17. The terminal according to any one of claims 10 to 16, characterized in that:

    The determining unit determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

    The determining unit determines the second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

    The determining unit determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, including:

    The determining unit determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.
18. The terminal according to any one of claims 10 to 17, wherein the first channel evaluation criterion, the second channel evaluation criterion, and the third channel evaluation criterion both include a channel competition window length and an energy gate. a limit value; estimating a probability that the unlicensed spectrum resource is idle based on a channel estimation criterion including a shorter channel contention window length included, or estimating based on a channel evaluation criterion including the energy threshold value included The probability that the unlicensed spectrum resource is idle is greater.
19. A terminal, comprising: an output device, a memory and a processor, the processor calling a free channel evaluation program in the memory for performing the following operations:

    Evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period;

    If idle, the second channel evaluation criterion is determined to be an evaluation of whether the unlicensed spectrum resource is idle. a channel evaluation criterion; or, if not idle, determining a third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle, wherein the license exemption is evaluated based on the second channel evaluation criterion The probability that the spectrum resource is idle is not less than the probability that the unlicensed spectrum resource is idle based on the first channel evaluation criterion, and the probability that the unlicensed spectrum resource is idle based on the third channel evaluation criterion is less than The first channel evaluation criterion estimates the probability that the unlicensed spectrum resource is idle;

    And determining, by the determined channel evaluation criterion, whether the unlicensed spectrum resource is idle, and transmitting, by using the output device, the uplink data to the network device by using the unlicensed spectrum resource when the unlicensed spectrum resource is idle.
20. The terminal according to claim 19, wherein the duration of the first preset time period is less than or equal to the maximum channel occupation time length MCOT.
21. The terminal according to claim 19, wherein the terminal further comprises an input device; the processor is further configured to: during the first preset time period, evaluate whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion And receiving, by the input device, an indication message sent by the network device, where the indication message includes information about the unlicensed spectrum resource and information of the first preset time period, where the first preset time period is The network device uses the unlicensed spectrum resource to transmit the maximum channel occupation time MCOT of the downlink data.
22. The terminal according to any one of claims 19 to 21, wherein the processor evaluates whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion:

    The processor evaluates whether the unlicensed spectrum resource is idle by the determined channel evaluation criterion during the first preset time period.
23. The terminal according to any one of claims 19 to 22, wherein the processor evaluates whether the unlicensed spectrum resource is idle or not based on the first channel evaluation criterion in the first preset time period. for:

    Determining, by the processor, whether the unlicensed spectrum resource is idle on the scheduled first transmission time unit based on the first channel evaluation criterion in the first preset time period;

    Determining, by the determined channel estimation criterion, whether the unlicensed spectrum resource is idle, and transmitting, by the output device, the unlicensed spectrum resource to the network device by using the output device when the unlicensed spectrum resource is idle The uplink data is specifically as follows:

    And determining, by the processor, whether the unlicensed spectrum resource is idle on the scheduled second transmission time unit, based on the determined channel evaluation criterion, in the first preset time period, and evaluating the license-free And transmitting, by the output device, uplink data by using the unlicensed spectrum resource on the second transmission time unit when the spectrum resource is idle, the second transmission time unit being after the first transmission time unit.
24. The terminal according to claim 23, wherein the first transmission time unit is a first transmission time unit in which the terminal is scheduled.
25. The terminal according to any one of claims 19 to 24, wherein the processor evaluates whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion in the first preset time period:

    The processor performs, at a first time period, a step of evaluating whether the unlicensed spectrum resource is idle based on the first channel evaluation criterion at least once.
26. The terminal according to any one of claims 19 to 25, characterized in that:

    The channel determining criterion determined by the processor to determine the second channel evaluation criterion as to whether the unlicensed spectrum resource is idle is specifically:

    Determining, by the processor, a second channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a second preset time period;

    The processor determines a third channel evaluation criterion to evaluate whether the unlicensed spectrum resource is empty The idle channel evaluation criteria are as follows:

    The processor determines the third channel evaluation criterion as a channel evaluation criterion for evaluating whether the unlicensed spectrum resource is idle within a third preset time period.
27. The method according to any one of claims 19 to 26, wherein the first channel evaluation criterion, the second channel evaluation criterion, and the third channel evaluation criterion both include a channel contention window length and an energy gate. a limit value; estimating a probability that the unlicensed spectrum resource is idle based on a channel estimation criterion including a shorter channel contention window length included, or estimating based on a channel evaluation criterion including the energy threshold value included The probability that the unlicensed spectrum resource is idle is greater.

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