WO2017193674A1

WO2017193674A1 - Method for controlling data transmission and related devices

Info

Publication number: WO2017193674A1
Application number: PCT/CN2017/074934
Authority: WO
Inventors: 朱广勇
Original assignee: 深圳市金立通信设备有限公司
Priority date: 2016-05-10
Filing date: 2017-02-27
Publication date: 2017-11-16
Also published as: CN105979602A

Abstract

Embodiments of the present invention provide a method for controlling data transmission and related devices. The method comprises: when a licensed frequency spectrum assists an unlicensed frequency spectrum in uplink scheduling, a base station obtains a target downlink subframe to be sent in the unlicensed frequency spectrum, and determines at least two uplink subframes that the target downlink subframe is allowed to schedule; the base station generates uplink scheduling information according to the at least two uplink subframes, the uplink scheduling information comprising an uplink (UL) index used for indicating a target uplink subframe scheduled by the target downlink subframe among the at least two uplink subframes; the base station sends downlink control information carrying the uplink scheduling information to a terminal over the target downlink subframe. By implementing embodiments of the present invention, one downlink subframe can schedule multiple uplink subframes, and the resource utilization rate of a system is improved effectively.

Description

Data transmission control method and related equipment

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission control method and related device.

Background technique

With the popularity of user equipment and the dramatic increase in communication traffic, licensed spectrum is increasingly insufficient to provide higher network capacity. In order to meet the growing network demand, expanding the use of unlicensed spectrum based on licensed spectrum has become an important feasible direction. The 3GPP (3rd Generation Partnership Project) organization proposed LAA (Licensed Assisted Access) technology to enable the use of unlicensed spectrum resources with the assistance of licensed spectrum. In order to make the licensed spectrum and the unlicensed spectrum coexist better, the LBT (Listen Before Talk) mechanism is introduced in the LAA system, that is, the channel state is monitored before the data transmission, and whether the channel to be used is determined is It has been occupied, and the resources of the channel are scheduled on the premise that the channel is not occupied.

In the LTE (Long Term Evolution) system, the scheduling information of the uplink subframe is sent by the Downlink Control Information (DCI) of the downlink subframe, and generally, a corresponding uplink is scheduled for each downlink subframe. Subframe. However, when the channel is occupied by the LBT mechanism, the corresponding downlink subframe cannot be transmitted, so that the uplink subframe corresponding to the downlink subframe cannot be scheduled, thereby reducing the utilization of system resources.

Summary of the invention

The embodiment of the invention provides a data transmission control method and related device, which can enable multiple downlink subframes to be scheduled in one downlink subframe, thereby effectively improving system resource utilization.

A first aspect of the embodiments of the present invention provides a data transmission control method, which is applied to an authorized auxiliary access LAA system, where the method includes:

When the base station performs the uplink scheduling of the unlicensed spectrum, the base station acquires the target downlink subframe to be transmitted, and determines at least two uplink subframes that are allowed to be scheduled in the target downlink subframe, where the target downlink subframe is deployed in Unlicensed spectrum;

The base station generates uplink scheduling information according to the at least two uplink subframes, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink subframe is in the at least two uplink subframes. a target uplink subframe scheduled in the frame;

Sending, by the base station, downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.

A second aspect of the embodiments of the present invention provides a data transmission control method, which is applied to an authorized auxiliary access LAA system, where the method includes:

The terminal receives the downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and carries the uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink is allowed to be used. Scheduling of at least two uplink subframes of frame scheduling;

The terminal determines, according to the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes.

A third aspect of the embodiments of the present invention provides a base station, including:

An acquiring unit, configured to acquire a target downlink subframe to be sent, where the target downlink subframe is deployed in an unlicensed spectrum;

a determining unit, configured to determine at least two uplink subframes that are allowed to be scheduled by the target downlink subframe;

a generating unit, configured to generate uplink scheduling information according to the at least two uplink subframes, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink subframe is in the at least two a target uplink subframe scheduled in an uplink subframe;

And a sending unit, configured to send downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.

A fourth aspect of the embodiments of the present invention provides a terminal, including:

a receiving unit, configured to receive downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and that carries uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate permission to be Decoding the at least two uplink subframes scheduled by the target downlink subframe;

a determining unit, configured to determine, according to the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes.

In the embodiment of the present invention, in the authorized auxiliary access LAA system, when the base station performs the uplink scheduling of the unlicensed spectrum, the base station may determine the target downlink after obtaining the target downlink subframe to be sent in the unlicensed spectrum. The subframe is configured to allow at least two uplink subframes to be scheduled, and the uplink scheduling information is generated according to the at least two uplink subframes, where the uplink scheduling information includes an uplink index UL index, and is used to indicate that the target downlink subframe is in the at least two uplinks. The target uplink subframe that is scheduled in the subframe, the base station may send the downlink control information that carries the uplink scheduling information to the terminal, so that the terminal may be in the target uplink subframe according to the downlink control information. Perform uplink data transmission. It can be seen that, in the embodiment of the present invention, a UL index may be introduced in the downlink control information to indicate an uplink subframe that is specifically scheduled by the downlink subframe, to support one downlink subframe to schedule two or more uplink subframes, thereby being able to increase The probability that the uplink subframe is scheduled effectively improves the uplink performance of the system and improves the resource utilization of the system.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

2 is a schematic flowchart of a method for controlling data transmission according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a downlink subframe scheduling uplink subframe according to an embodiment of the present disclosure;

4 is a schematic flowchart of another method for controlling data transmission according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of still another base station according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of still another terminal according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides a data transmission control method and related device, which may include an uplink index UL index in the downlink control information to indicate an uplink subframe specifically scheduled by the downlink subframe, to support one downlink subframe scheduling, or Two or more uplink subframes can increase the probability that the uplink subframe is scheduled, effectively improve the uplink performance of the system, and improve the resource utilization of the system. The details are described below separately.

For a better understanding of the embodiments of the present invention, the application scenarios disclosed in the embodiments of the present invention are described below. Referring to FIG. 1, FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention. In the application scenario shown in FIG. 1, a base station and at least one terminal are included, wherein the base station can be in communication connection with multiple terminals. Terminals can include mobile phones, tablets, PDAs, personal digital assistants (PDAs), mobile Internet devices (MIDs), smart wearable devices (such as smart watches, smart bracelets, etc.) The terminal is not limited in this embodiment of the present invention. In the application scenario shown in FIG. 1 , carrier aggregation (CA) technology may be introduced to aggregate multiple consecutive or discontinuous carriers to increase the peak rate and network capacity of the user. The transmission bandwidth of the system effectively increases the uplink and downlink transmission rates. However, due to the limited licensed spectrum resources, it is increasingly unable to meet the growing user base, so spectrum resources can be extended by using unlicensed spectrum. In order to achieve the use of unlicensed spectrum with the aid of licensed spectrum, an Authorized Auxiliary Access LAA technology has been introduced. In the LAA system, since the unlicensed spectrum is introduced, it is necessary to consider the coexistence of the licensed spectrum and the unlicensed spectrum. Therefore, it is necessary to comply with the use rule of the unlicensed spectrum to listen to the LBT mechanism first.

In the embodiment of the present invention, when the base station and the terminal perform data transmission, the LBT mechanism is introduced, and the base station needs to perform channel state monitoring before scheduling or transmitting data to determine the busy state of the channel, if the channel state is idle. The channel can be used for user scheduling or data transmission; if the channel status is non-idle (ie, occupied), the channel cannot be used. In the existing LTE system, there are seven time slot configurations of uplink and downlink time slot configurations 0 to 6, and each uplink and downlink time slot configuration The allocation of the corresponding uplink and downlink subframes is as shown in Table 1, where D represents a downlink subframe, S represents a special subframe, and U represents an uplink subframe. For the uplink and downlink timeslot configuration 1 to 6, the number of the downlink subframes is greater than or equal to the number of the uplink subframes. The uplink scheduling information of the uplink subframe is sent by the downlink control information DCI of the downlink subframe, and each downlink sub-node is specified. The frame schedules a corresponding uplink subframe, that is, a one-to-one correspondence. For the uplink and downlink time slot configuration 0, since the number of downlink subframes is less than the number of uplink subframes, in order to make all uplink subframes scheduled, one downlink subframe can schedule two uplink subframes, in order to identify a downlink. The uplink scheduling information in the DCI in the subframe is corresponding to the uplink subframe, and the "UL index" field is introduced, and the length is 2 bits, to identify that the downlink control information is used to schedule which subframe of the two uplink subframes. . The LBT mechanism needs to perform the channel state detection before the scheduling. When the channel is occupied, the downlink subframe cannot send the downlink control information, and the corresponding uplink subframe cannot be scheduled for uplink transmission.

Table 1

Based on the above problem, and in order to make all the uplink subframes have the possibility of being scheduled to maximize the uplink performance of the system, the embodiment of the present invention adopts a scheme in which one downlink subframe can schedule multiple uplink subframes, when uplink and downlink. The "UL index" field is also introduced in the slot configuration 1 to 6 to indicate which uplink subframe is scheduled in a downlink subframe, the length of the "UL index" field is greater than or equal to 2, and the "UL index" in the uplink and downlink slot configuration is 0. The field is extended such that the length of the "UL index" field is also greater than or equal to two. By implementing the solution, the uplink subframe can be fully scheduled under the premise of LBT, and the effective improvement is effective. The uplink performance of the system improves the resource utilization of the system.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a method for controlling data transmission. Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method for controlling data transmission according to an embodiment of the present invention. The data transmission control method is applied to the LAA system. As shown in FIG. 2, the data transmission control method may include the following steps:

201. The base station acquires a target downlink subframe to be sent when performing the uplink scheduling by the spectrum-assisted unlicensed spectrum.

In the embodiment of the present invention, in the LAA system, when the base station is to perform uplink scheduling or downlink transmission in the licensed spectrum-assisted unlicensed spectrum, the target downlink subframe may be acquired first, where the target downlink subframe is available for data information and/or Or the downlink subframe in which the control information is transmitted, and the channel corresponding to the target downlink subframe is in an idle state at this time. The target downlink subframe may be deployed in the unlicensed spectrum, that is, the carrier carrying the target downlink subframe is deployed in the unlicensed spectrum.

In the embodiment of the present invention, the specific implementation manner of the base station acquiring the target downlink subframe to be sent may include the following steps:

21) The base station uses the LBT to detect the channel for transmitting the downlink subframe on the unlicensed spectrum by using the LBT first;

22) When detecting that the channel for transmitting the downlink subframe on the unlicensed spectrum is an idle channel, the base station determines that the downlink subframe is the target downlink subframe to be transmitted.

In the embodiment of the present invention, in order to better coexist the licensed spectrum and the unlicensed spectrum, an LBT mechanism is introduced in the LAA system, and the base station uses the LBT mechanism to perform unlicensed spectrum before performing uplink scheduling or downlink transmission on the unlicensed spectrum. The channel for transmitting a certain downlink subframe performs state detection. When detecting that the channel is occupied, the state of the channel corresponding to the next downlink subframe may be detected; when the state of the channel is detected to be idle. If the downlink subframe is determined to be the target downlink subframe, the base station may perform uplink scheduling or downlink transmission on the downlink subframe.

202. The base station determines at least two uplink subframes that are allowed to be scheduled in the target downlink subframe.

In the embodiment of the present invention, when the base station acquires the target downlink subframe that can be used for the control information transmission, the base station may further determine at least two uplink subframes that can be scheduled in the target downlink subframe. among them, The at least two uplink subframes may be an uplink subframe in the licensed spectrum, or an uplink subframe in the unlicensed spectrum, and may include both an uplink subframe in the licensed spectrum and an uplink subframe in the unlicensed spectrum. .

As an optional implementation manner, the specific implementation manner of the step 202: determining, by the base station, the at least two uplink subframes that the target downlink subframe is allowed to be scheduled may include the following steps:

The base station determines, according to the currently used target uplink and downlink time slot configuration, and at least one of the preset transmission delay and the uplink channel quality, at least two of the target downlink subframes are allowed to be scheduled in the target uplink and downlink time slot configuration. Uplink subframe.

In this embodiment, the target uplink and downlink timeslots currently used by the base station are configured to be one of 0 to 6. The downlink subframes and the uplink subframes corresponding to different uplink and downlink timeslot configurations are different. The preset transmission delay may be the minimum delay of the downlink transmission feedback, which is generally specified as 4 milliseconds (ms), and the preset transmission delays corresponding to different uplink and downlink time slot configurations may be different. Specifically, if the base station performs downlink transmission on the nth (n is an integer greater than or equal to 0) downlink subframes, the uplink subframe that can be scheduled in the nth downlink subframe may be the n+k (k> = 4) uplink subframes.

In this embodiment, the base station may first know the quality of the uplink channel before performing uplink scheduling, and may perform scheduling if the uplink channel quality is good, and may not perform scheduling if the uplink channel quality is poor. The base station can learn the quality of the current uplink channel according to the SRS (Sounding Reference Signal) reported by the terminal. The base station may determine at least two uplink subframes that the target downlink subframe is allowed to schedule in combination with the at least one of the preset transmission delay and the uplink channel quality.

For example, refer to FIG. 3. FIG. 3 is a schematic diagram of a downlink subframe scheduling uplink subframe according to an embodiment of the present invention. Figure 3 shows the frame structure corresponding to the uplink and downlink time slot configuration 0. The base station can obtain the target downlink subframe to be transmitted as the subframe 0 through the LBT mechanism, and detect the subframe 1, the subframe 5 and the subframe 6. All are occupied, and the special subframe S can be regarded as a downlink subframe. Further, the base station can determine, in the uplink and downlink time slot configuration 0, that the uplink subframe that is allowed to be scheduled in the subframe 0 is the subframe 4 and the sub-frame according to the preset transmission delay (eg, not lower than 4 ms) and/or the uplink channel quality. Frames 7 to 9 have a total of 4 subframes.

As an optional implementation manner, the step 202 determines, by the base station, that the target downlink subframe is allowed to be scheduled. The specific implementation of the at least two uplink subframes may include the following steps:

24) The base station determines, according to the currently used target uplink and downlink time slot configuration and the first preset mapping relationship, at least two uplink subframes that are allowed to be scheduled in the target uplink and downlink time slot configuration of the target downlink subframe, where the first pre- The mapping relationship includes the correspondence between the downlink subframes and the uplink subframes that are allowed to be scheduled in different uplink and downlink timeslot configurations.

In this implementation manner, the base station may, according to the currently configured target uplink and downlink time slot configuration, find out, in the first preset mapping relationship, different downlink subframes in the target uplink and downlink time slot configuration, corresponding to the uplink subframes that are allowed to be scheduled, thereby The uplink subframe in which the target downlink subframe is allowed to be scheduled is determined. For example, as shown in FIG. 3, the uplink subframe in which the subframe 0 is allowed to be scheduled in the uplink and downlink slot configuration 0 in the first preset mapping relationship is subframe 4 and subframes 7-9.

203. The base station generates uplink scheduling information according to the at least two uplink subframes.

In this embodiment of the present invention, the uplink scheduling information may include, but is not limited to, a modulation and coding mode, an allocated resource block, and an uplink index UL index. The modulation coding mode and the resource block allocation may be determined according to the channel quality and/or the scheduling policy, and the UL index may be used to indicate the target uplink subframe that the target downlink subframe is actually scheduled in the at least two uplink subframes. That is, the UL index can be used to know which subframe or subframes the target downlink subframe is scheduled in the at least two uplink subframes. The UL index may be represented by N (N>=2) bits, and the bit position corresponding to the uplink subframe actually scheduled by the target downlink subframe may be 1. The target uplink subframe may be one or more, and may be an uplink subframe in the licensed spectrum, or an uplink subframe in the unlicensed spectrum, and may include both an uplink subframe and an unauthorized sub-frame in the licensed spectrum. Uplink subframes in the spectrum.

As an optional implementation manner, the bit length of the UL index may be determined by the number of the at least two uplink subframes. Preferably, the bit length of the UL index may be not less than the number of the at least two uplink subframes. . For example, as shown in FIG. 3, when subframe 0 allows the scheduled uplink subframe to be four subframes of subframe 4 and subframes 7-9, the bit length of the UL index may be greater than or equal to 4 bits. Assuming that the bit length of the UL index is 4 bits, and the uplink subframe actually scheduled by subframe 0 is subframe 4 and subframe 9, the sequence numbers in the allowed uplink subframes are 1 and 4, respectively, and the UL is The index is expressed as 1001, that is, the 1st and 4th bit positions are 1. Assuming that the target downlink subframe to be transmitted in FIG. 3 is subframe 1, and the uplink subframe to be scheduled is 3 subframes in subframes 7-9, the ratio of UL index is The special length can be greater than or equal to 3 bits. At this time, the indication information may be additionally added to the uplink scheduling information to indicate which target downlink subframe is. Therefore, the bit length of the UL index can be adjusted (eg, increased or decreased) according to the number of uplink subframes that the target downlink subframe allows to be scheduled, thereby reducing unnecessary bits to reduce the signaling load of the system.

As an optional implementation manner, the bit length of the UL index may be determined by the currently used target uplink and downlink time slot configuration and the second preset mapping relationship, where the second preset mapping relationship includes different uplink and downlink time slot configurations and bits. The correspondence of lengths. The bit lengths of the UL indexes corresponding to different uplink and downlink timeslot configurations may be different. For example, when the bit length of the UL index corresponding to the uplink and downlink slot configuration 0 is set to 4 bits in the second preset mapping relationship, when the base station adopts the uplink and downlink time slot configuration 0, no matter which target downlink subframe is the default UL index. The bit length is 4 bits. In this case, there is no need to additionally indicate which target downlink subframe is in the uplink scheduling information. In addition, the bit length of the UL index corresponding to the uplink and downlink time slot configuration is generally determined according to the most uplink subframe that can be scheduled by the target downlink subframe in the uplink and downlink time slot configuration.

204. The base station sends downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.

In the embodiment of the present invention, the uplink scheduling information of the uplink subframe is sent by using the downlink control information of the downlink subframe. Therefore, the base station may carry the uplink scheduling information in the downlink control information and send the uplink scheduling information to the terminal. Specifically, the base station sends the downlink control information that carries the uplink scheduling information to the terminal through the PDCCH (Physical Downlink Control Channel) in the target downlink subframe, so that the terminal is in the target uplink according to the uplink scheduling information. Uplink transmission is performed on the subframe.

In the embodiment of the present invention, when the base station determines the at least two uplink subframes, the terminal may notify the terminal of the at least two uplink subframes that are allowed to be scheduled in the target downlink subframe, and may be carried by using uplink scheduling information, or may be Notify the terminal before sending downlink control information.

In the embodiment of the present invention, after performing step 204, the method described in FIG. 2 may further include the following steps:

25) The base station receiving data that is uplinked by the terminal in the target uplink subframe according to the downlink control information.

After receiving the downlink control information sent by the base station, the terminal parses the downlink control information. Obtaining a target uplink subframe indicated by the UL index in the uplink scheduling information, and performing uplink data transmission on the target uplink subframe. Specifically, the base station receives data that the terminal performs uplink transmission by using a PUSCH (Physical Uplink Shared Channel) in the target uplink subframe according to the downlink control information. When the target uplink subframe is an uplink subframe in the unlicensed spectrum, before the terminal performs uplink data transmission on the target uplink subframe, the terminal needs to use the LBT mechanism to detect the channel state, and then perform the transmission when the channel is idle; When the target uplink subframe is an uplink subframe in the licensed spectrum, the terminal may perform uplink data transmission on the target uplink subframe without performing LBT channel detection.

In the method described in FIG. 2, the base station may determine the target downlink subframe after acquiring the target downlink subframe to be transmitted in the unlicensed spectrum by using the LBT mechanism. The at least two uplink subframes are allowed to be scheduled, and the uplink scheduling information is generated according to the at least two uplink subframes, where the uplink scheduling information includes a UL index, and is used to indicate that the target downlink subframe is scheduled in the at least two uplink subframes. The target uplink subframe, the base station may send the downlink control information carrying the uplink scheduling information to the terminal in the target downlink subframe, so that the terminal may perform uplink data transmission in the target uplink subframe according to the downlink control information. . By implementing the method described in FIG. 2, a UL index may be introduced in the downlink control information to indicate an uplink subframe that is specifically scheduled by the downlink subframe, to support one downlink subframe to schedule two or more uplink subframes, thereby enabling Increase the probability that the uplink subframe is scheduled, effectively improve the uplink performance of the system, and improve the resource utilization of the system.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another method for controlling data transmission. Referring to FIG. 4, FIG. 4 is another method for controlling data transmission according to an embodiment of the present invention. The data transmission control method is applied to the LAA system. As shown in FIG. 4, the data transmission control method may include the following steps:

401. The terminal receives downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum, and carries the uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink subframe is allowed to be scheduled. The scheduling of at least two uplink subframes.

In the embodiment of the present invention, when the base station acquires the mesh to be sent in the unlicensed spectrum by using the LBT mechanism After the downlink subframe is marked, and the at least two uplink subframes that are allowed to be scheduled in the target downlink subframe are determined, the base station may further generate uplink scheduling information, and introduce a UL index in the uplink scheduling information to indicate that the target downlink subframe is in the And determining, by the at least two uplink subframes, which uplink subframes are actually scheduled, and transmitting the downlink control information that carries the uplink scheduling information to the terminal, so that the terminal can receive the downlink control that is sent by the base station and carries the uplink scheduling information. information. The at least two uplink subframes may be uplink subframes in the licensed spectrum, or uplink subframes in the unlicensed spectrum, and may include both uplink subframes in the licensed spectrum and uplinks in the unlicensed spectrum. Subframe.

In the embodiment of the present invention, the uplink scheduling information may include, in addition to the UL index, a modulation and coding mode, an allocated resource block, and the like, which are not limited in the embodiment of the present invention. The bit length of the UL index is determined by the base station, and the UL index may be represented by N (N>=2) bits. When the bit corresponding to an uplink subframe in the at least two uplink subframes is set to 1, The uplink subframe may be scheduled to be scheduled. When the bit corresponding to an uplink subframe in the at least two uplink subframes is set to 0, the uplink subframe may be considered as unscheduled.

In the embodiment of the present invention, before receiving the downlink control information, the terminal may learn the at least two uplink subframes that are allowed to be scheduled by the target downlink subframe, and the base station may allow the at least one of the target downlink subframes to be scheduled. The two uplink subframes are carried in the uplink scheduling information, so that the terminal knows when the uplink scheduling information is parsed.

As an optional implementation manner, the bit length of the UL index may be determined by the number of the at least two uplink subframes. Preferably, the bit length of the UL index may be not less than the number of the at least two uplink subframes. .

As an optional implementation manner, the bit length of the UL index may be determined by a target uplink and downlink time slot configuration currently adopted by the base station and a preset mapping relationship, where the preset mapping relationship includes different uplink and downlink time slot configurations and bit lengths. relationship. The bit lengths of the UL indexes corresponding to different uplink and downlink timeslot configurations may be different.

402. The terminal determines, according to the UL index, a target uplink subframe.

In the embodiment of the present invention, after receiving the downlink control information, the terminal may parse the uplink scheduling information in the downlink control information to parse the content in the uplink scheduling information, and may be based on the UL index in the uplink scheduling information. Determine the target uplink subframe. The target uplink subframe is An uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes. The target uplink subframe may be one or more, and may be an uplink subframe in the licensed spectrum or an uplink subframe in the unlicensed spectrum, and may also include an uplink subframe in the licensed spectrum and an unlicensed spectrum. Uplink subframe. For example, as shown in FIG. 3, when subframe 0 allows the scheduled uplink subframe to be four subframes of subframe 4 and subframes 7-9, the bit length of the UL index may be greater than or equal to 4 bits. Assuming that the bit length of the UL index is 4 bits, and the UL index is represented as 1001, that is, the 1st and 4th bit positions are 1, it can be indicated that the subframe 4 and the subframe 9 are scheduled, that is, the target is determined according to the UL index. The uplink subframes are subframe 4 and subframe 9.

In the embodiment of the present invention, after performing step 402, the method described in FIG. 4 may further include the following steps:

41) The terminal sends uplink data to the base station in the target uplink subframe according to the downlink control information.

The terminal sends uplink data to the base station through the PUSCH in the target uplink subframe according to the downlink control information. Specifically, the terminal may send uplink data to the base station in the target uplink subframe on the allocated resource block by using the corresponding modulation and coding scheme according to the downlink control information. When the target uplink subframe is an uplink subframe in the unlicensed spectrum, before the terminal performs uplink data transmission on the target uplink subframe, the terminal needs to use the LBT mechanism to detect the channel state, and then perform the transmission when the channel is idle; When the target uplink subframe is an uplink subframe in the licensed spectrum, the terminal may perform uplink data transmission on the target uplink subframe without performing LBT channel detection.

In the embodiment of the present invention, by performing the method described in FIG. 4, the terminal may parse the uplink scheduling information in the downlink control information sent by the base station, and determine one or more uplinks to be scheduled according to the UL index introduced in the uplink scheduling information. The sub-frames perform uplink data transmission in the scheduled uplink subframes, thereby increasing the probability that the uplink subframes are scheduled, effectively improving the uplink performance of the system, and improving system resource utilization.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a base station. Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention, for performing a data transmission control method provided by an embodiment of the present invention. As shown in FIG. 5, the base station may include:

The obtaining unit 501 is configured to acquire the uplink when the licensed spectrum assists the unlicensed spectrum for uplink scheduling. The target downlink subframe to be sent.

In the embodiment of the present invention, the target downlink subframe is a downlink subframe in which data information and/or control information can be transmitted, and the channel corresponding to the target downlink subframe is in an idle state at this time. The target downlink subframe is deployed in an unlicensed spectrum.

The determining unit 502 is configured to determine at least two uplink subframes that the target downlink subframe is allowed to be scheduled.

In the embodiment of the present invention, the at least two uplink subframes may be an uplink subframe in the licensed spectrum, or an uplink subframe in the unlicensed spectrum, and may include both an uplink subframe and an unauthorized sub-frame in the licensed spectrum. Uplink subframes in the spectrum.

As an optional implementation manner, the determining unit 502 determines that the specific implementation manner of the at least two uplink subframes that the target downlink subframe allows to be scheduled may be:

The determining unit 502 determines, according to the currently adopted target uplink and downlink time slot configuration, and at least one of the preset transmission delay and the uplink channel quality, at least two scheduled scheduling of the target downlink subframe in the target uplink and downlink time slot configuration. Uplink subframe.

The determining unit 502 determines, according to the currently adopted target uplink and downlink time slot configuration and the first preset mapping relationship, at least two uplink subframes that the target downlink subframe is allowed to be scheduled in the target uplink and downlink time slot configuration, where the first pre- The mapping relationship includes the correspondence between the downlink subframes and the uplink subframes that are allowed to be scheduled in different uplink and downlink timeslot configurations.

The generating unit 503 is configured to generate uplink scheduling information according to the at least two uplink subframes.

In this embodiment of the present invention, the uplink scheduling information may include, but is not limited to, a modulation and coding mode, an allocated resource block, and an uplink index UL index. The modulation coding mode and the resource block allocation may be determined according to the channel quality and/or the scheduling policy, and the UL index may be used to indicate the target uplink subframe that the target downlink subframe is actually scheduled in the at least two uplink subframes. That is, the UL index can be used to know which subframe or subframes are scheduled in the at least two uplink subframes in the target downlink subframe. The target uplink subframe may be one or more, and may be an uplink subframe in the licensed spectrum, or an uplink subframe in the unlicensed spectrum, and may include both an uplink subframe and an unauthorized sub-frame in the licensed spectrum. Uplink subframes in the spectrum.

As an optional implementation manner, the bit length of the UL index may be determined by the currently used target uplink and downlink time slot configuration and the second preset mapping relationship, where the second preset mapping relationship includes different uplink and downlink time slot configurations and bits. The correspondence of lengths. The bit lengths of the UL indexes corresponding to different uplink and downlink timeslot configurations may be different.

The sending unit 504 is configured to send downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.

Referring to FIG. 6 , FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present invention, for performing a data transmission control method provided by an embodiment of the present invention. The base station shown in FIG. 6 is further optimized based on the base station shown in FIG. 5. Compared with the base station shown in FIG. 5, the acquiring unit 501 in the base station shown in FIG. 6 may include:

The detecting sub-unit 5011 is configured to detect, by using the LBT, the channel for transmitting the downlink subframe on the unlicensed spectrum.

The determining sub-unit 5012 is configured to determine, when the detecting sub-unit 5011 detects that the channel for transmitting the downlink subframe on the unlicensed spectrum is an idle channel, determining the downlink subframe as the target downlink subframe to be sent.

As an optional implementation manner, the base station shown in FIG. 6 may further include:

The receiving unit 505 is configured to receive data that is uplinked by the terminal in the target uplink subframe according to the downlink control information.

After transmitting the downlink control information carrying the uplink scheduling information to the terminal, the sending unit 504 may send a triggering instruction to the receiving unit 505 to trigger the receiving unit 505 to receive the data that is uplinked by the terminal according to the downlink control information.

In the embodiment of the present invention, by implementing the base station shown in FIG. 5 and FIG. 6, a UL index may be introduced in the downlink control information to indicate an uplink subframe specifically scheduled by the downlink subframe, to support one downlink subframe scheduling two or two. More than one uplink subframe, which can increase the probability of the uplink subframe being scheduled, effectively improve the uplink performance of the system, and improve the resource utilization of the system.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another base station. Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention, for performing a data transmission control method provided by an embodiment of the present invention. As shown in FIG. 7, the base station 700 can include at least one processor 701, such as a CPU (Central Processing Unit), at least one input device 702, at least one output device 703, a memory 704, and the like. Among them, these components can be communicatively connected through one or more buses 705. It can be understood by those skilled in the art that the structure of the base station shown in FIG. 7 does not constitute a limitation on the embodiment of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more than the figure or Fewer parts, or a combination of some parts, or different parts. among them:

In the embodiment of the present invention, the input device 702 may include a wired interface, a wireless interface, and the like, and may be used to receive data and uplink data transmitted by the terminal. The output device 703 may include a wired interface, a wireless interface, etc., and may be used to downlink signals to the terminal and the like.

In the embodiment of the present invention, the memory 704 may be a high speed RAM memory or a non-volatile memory, such as at least one disk memory. The memory 704 can optionally also be at least one storage device located remotely from the aforementioned processor 701. As shown in FIG. 7, the application 704 and the like may be included in the memory 704, which is not limited by the embodiment of the present invention.

In the base station shown in FIG. 7, the processor 701 can be used to call an application stored in the memory 704 to perform the following operations:

Obtaining a target downlink subframe to be transmitted, and determining at least two uplink subframes to be scheduled in the target downlink subframe, where the target downlink subframe is deployed in the unlicensed spectrum. ;

Generating uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate a target uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes, according to the foregoing at least two uplink subframes;

The trigger output device 703 sends the downlink control information carrying the uplink scheduling information to the terminal in the target downlink subframe.

As an optional implementation manner, the specific implementation manner of the processor 701 acquiring the target downlink subframe to be sent may be:

After listening, the LBT detects the channel used for transmitting the downlink subframe on the unlicensed spectrum;

When it is detected that the channel for transmitting the downlink subframe on the unlicensed spectrum is an idle channel, determining that the downlink subframe is the target downlink subframe to be transmitted.

As an optional implementation manner, the processor 701 can also call an application stored in the memory 704 and perform the following operations:

The trigger input device 702 receives data that is uplinked by the terminal in the target uplink subframe according to the downlink control information.

As an optional implementation manner, the specific implementation manner that the processor 701 determines that at least two uplink subframes that the target downlink subframe is allowed to be scheduled may be:

Determining at least one of the target uplink and downlink subframes allowed to be scheduled in the target uplink and downlink time slot configuration according to at least one of a target uplink and downlink time slot configuration currently used, and a preset transmission delay and an uplink channel quality stored in the memory 704 Two uplink subframes.

Determining, according to the currently used target uplink and downlink time slot configuration and the first preset mapping relationship stored in the memory 704, at least two uplink subframes that are allowed to be scheduled in the target uplink and downlink time slot configuration, where A preset mapping relationship includes the correspondence between the downlink subframes and the uplink subframes that are allowed to be scheduled in different uplink and downlink timeslot configurations.

As an optional implementation manner, the bit length of the UL index may be determined by the currently used target uplink and downlink time slot configuration and the second preset mapping relationship stored in the memory 704, where the second preset mapping relationship includes different uplink and downlink. The correspondence between the slot configuration and the bit length.

In the embodiment of the present invention, by implementing the base station shown in FIG. 7 , a UL index may be introduced in the downlink control information to indicate an uplink subframe specifically scheduled by the downlink subframe, so as to support two or more scheduling of one downlink subframe. The uplink subframe can increase the probability that the uplink subframe is scheduled, effectively improve the uplink performance of the system, and improve the resource utilization of the system.

Based on the application scenario shown in FIG. 1 , an embodiment of the present invention discloses a terminal. Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention, for performing a data transmission control method provided by an embodiment of the present invention. As shown in FIG. 8, the terminal may include:

The receiving unit 801 is configured to receive downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and that carries uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target is allowed to be downlinked. The scheduling of at least two uplink subframes scheduled by the subframe.

In the embodiment of the present invention, the uplink scheduling information may include, in addition to the UL index, a modulation and coding mode, an allocated resource block, and the like, which are not limited in the embodiment of the present invention. The UL index may be represented by N (N>=2) bits. When the bit corresponding to an uplink subframe of the at least two uplink subframes is set to 1, it may indicate that the uplink subframe is scheduled. When the bit corresponding to an uplink subframe in the at least two uplink subframes is set to 0, the uplink subframe may be considered as unscheduled. The at least two uplink subframes may be uplink subframes in the licensed spectrum, or uplink subframes in the unlicensed spectrum, and may include both uplink subframes in the licensed spectrum and uplinks in the unlicensed spectrum. Subframe.

The determining unit 802 is configured to determine, according to the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes, and the target uplink subframe may be One or more of the uplink subframes in the licensed spectrum, and the uplink subframes in the unlicensed spectrum, and the uplink subframes in the unlicensed spectrum.

Please refer to FIG. 9 , which is a schematic structural diagram of another terminal according to an embodiment of the present invention. The method for controlling data transmission provided by the embodiment of the present invention is executed. The terminal shown in FIG. 9 is further optimized based on the terminal shown in FIG. 8. Compared with the terminal shown in FIG. 8, the terminal shown in FIG. 9 may further include:

The sending unit 803 is configured to send uplink data to the base station in the target uplink subframe according to the downlink control information.

Specifically, the sending unit 803 may perform uplink transmission of data to the base station by using the PUSCH in the target uplink subframe according to the downlink control information. When the target uplink subframe is an uplink subframe in the unlicensed spectrum, the sending unit 803 needs to use the LBT mechanism to detect the channel state before performing the uplink data transmission on the target uplink subframe, and the channel state is detected when the channel is idle. When the target uplink subframe is an uplink subframe in the licensed spectrum, the sending unit 803 can perform uplink data transmission on the target uplink subframe without performing LBT channel detection.

In the embodiment of the present invention, by performing the terminal shown in FIG. 8 and FIG. 9, the uplink scheduling information in the downlink control information sent by the base station may be parsed, and one or more scheduled ones are determined according to the UL index introduced in the uplink scheduling information. The uplink data is transmitted in the scheduled uplink subframe, so that the probability of the uplink subframe being scheduled is increased, the uplink performance of the system is effectively improved, and the resource utilization of the system is improved.

Based on the application scenario shown in FIG. 1, the embodiment of the present invention discloses another terminal. Referring to FIG. 10, FIG. 10 is a schematic structural diagram of another terminal according to an embodiment of the present invention, for performing a data transmission control method provided by an embodiment of the present invention. As shown in FIG. 10, the terminal 1000 may include at least one processor 1001, such as a CPU, at least one input device 1002, at least one output device 1003, a memory 1004, and the like. Among them, these components can be communicatively connected through one or more buses 1005. It will be understood by those skilled in the art that the structure of the terminal shown in FIG. 10 does not constitute a limitation on the embodiment of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more than the figure or Fewer parts, or a combination of some parts, or different parts. among them:

In the embodiment of the present invention, the input device 1002 may include a wired interface, a wireless interface, and the like, and may be used to receive signals sent by the base station in downlink. The output device 1003 can include a wired interface and a wireless connection. The port can be used to transmit data to the base station or the like.

In the embodiment of the present invention, the memory 1004 may be a high speed RAM memory or a non-volatile memory, such as at least one disk memory. The memory 1004 can also optionally be at least one storage device located remotely from the aforementioned processor 1001. As shown in FIG. 10, the operating system, the application program, the data, and the like may be included in the memory 1004 as a computer storage medium, which is not limited by the embodiment of the present invention.

In the terminal shown in FIG. 10, the processor 1001 can be used to call an application stored in the memory 1004 to perform the following operations:

The trigger input device 1002 receives the downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and carries the uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, and the UL index is used to indicate that the target downlink subframe is allowed to be used. Scheduling of at least two uplink subframes scheduled;

Determining, by the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes.

As an optional implementation manner, the processor 1001 may also invoke an application stored in the memory 1004 and perform the following operations:

The trigger output device 1003 uplinkly transmits data to the base station in the target uplink subframe according to the downlink control information.

As an optional implementation manner, the bit length of the UL index may be determined by a target uplink and downlink time slot configuration currently adopted by the base station and a preset mapping relationship, where the preset mapping relationship includes different uplink and downlink time slot configurations and bit lengths. relationship.

In the embodiment of the present invention, by implementing the terminal shown in FIG. 10, the uplink scheduling information in the downlink control information sent by the base station may be parsed, and the one or more uplink sub-segments determined according to the UL index introduced in the uplink scheduling information. The frame and the uplink data transmission are performed in the scheduled uplink subframe, so that the probability of the uplink subframe being scheduled is increased, the uplink performance of the system is effectively improved, and the resource utilization of the system is improved.

Modules or sub-modules in all embodiments of the present invention may be implemented by a general-purpose integrated circuit, such as a CPU, or by an ASIC (Application Specific Integrated Circuit).

It should be noted that, for the foregoing various method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because some steps may be performed in other orders or concurrently in accordance with the present application. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not described in detail in a certain embodiment can be referred to the related descriptions of other embodiments.

The steps in the method of the embodiment of the present invention may be sequentially adjusted, merged, and deleted according to actual needs.

In the embodiment of the present invention, a unit or a subunit in a base station and a terminal may be combined, divided, and deleted according to actual needs.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

A method for controlling data transmission and related devices provided by the embodiments of the present invention are described in detail above. The principles and implementation manners of the present invention are described in the specific examples. The description of the above embodiments is only used to help understanding. The method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and the scope of application. It is understood to be a limitation of the invention.

Claims

A method for controlling data transmission is characterized in that it is applied to an authorized auxiliary access LAA system, and the method includes:

When the base station performs the uplink scheduling of the unlicensed spectrum, the base station acquires the target downlink subframe to be transmitted, and determines at least two uplink subframes that are allowed to be scheduled in the target downlink subframe, where the target downlink subframe is deployed in Unlicensed spectrum;

The base station generates uplink scheduling information according to the at least two uplink subframes, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink subframe is in the at least two uplink subframes. a target uplink subframe scheduled in the frame;

Sending, by the base station, downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.
The method according to claim 1, wherein the acquiring, by the base station, the target downlink subframe to be sent includes:

The base station uses the LBT to detect the channel for transmitting the downlink subframe on the unlicensed spectrum after listening first;

When detecting that the channel for transmitting the downlink subframe on the unlicensed spectrum is an idle channel, the base station determines that the downlink subframe is a target downlink subframe to be transmitted.
The method according to claim 1 or 2, wherein the method further comprises:

The base station receives data that is uplinked by the terminal in the target uplink subframe according to the downlink control information.
The method according to any one of claims 1-3, wherein the base station determines at least two uplink subframes that the target downlink subframe is allowed to schedule, including:

Determining, by the base station, that the target downlink subframe is allowed to be scheduled in the target uplink and downlink time slot configuration according to at least one of a target uplink and downlink time slot configuration and a preset transmission delay and an uplink channel quality. At least two uplink subframes.
The method according to any one of claims 1-3, wherein the base station determines at least two uplink subframes that the target downlink subframe is allowed to schedule, including:

Determining, by the base station, at least two uplink subframes that are allowed to be scheduled in the target uplink and downlink time slot configuration according to the current uplink and downlink time slot configuration and the first preset mapping relationship, where The first preset mapping relationship includes a correspondence between a downlink subframe in a different uplink and downlink time slot configuration and an uplink subframe that is allowed to be scheduled.
The method according to any one of claims 1-5, wherein the bit length of the UL index is determined by the number of the at least two uplink subframes.
The method according to any one of claims 1 to 5, wherein the bit length of the UL index is determined by a currently adopted target uplink and downlink time slot configuration and a second preset mapping relationship, the second pre- Let the mapping relationship include the correspondence between different uplink and downlink time slot configurations and bit lengths.
A method for controlling data transmission is characterized in that it is applied to an authorized auxiliary access LAA system, and the method includes:

The terminal receives the downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and carries the uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink is allowed to be used. Scheduling of at least two uplink subframes of frame scheduling;

The terminal determines, according to the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes.
The method of claim 8 further comprising:

And the terminal sends uplink data to the base station in the target uplink subframe according to the downlink control information.
Method according to claim 8 or 9, characterized in that the ratio of the UL index The special length is determined by the number of the at least two uplink subframes.
The method according to claim 8 or 9, wherein the bit length of the UL index is determined by a currently configured target uplink and downlink time slot configuration and a preset mapping relationship, where the preset mapping relationship includes different uplink and downlink. The correspondence between the slot configuration and the bit length.
A base station, comprising:

An acquiring unit, configured to acquire a target downlink subframe to be sent, where the target downlink subframe is deployed in an unlicensed spectrum;

a determining unit, configured to determine at least two uplink subframes that are allowed to be scheduled by the target downlink subframe;

a generating unit, configured to generate uplink scheduling information according to the at least two uplink subframes, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate that the target downlink subframe is in the at least two a target uplink subframe scheduled in an uplink subframe;

And a sending unit, configured to send downlink control information that carries the uplink scheduling information to the terminal in the target downlink subframe.
The base station according to claim 12, wherein the obtaining unit comprises:

a detecting subunit, configured to detect, by using an LBT, a channel for transmitting a downlink subframe on an unlicensed spectrum;

And determining, by the detecting subunit, when the detecting subunit detects that the channel used for transmitting the downlink subframe on the unlicensed spectrum is an idle channel, determining that the downlink subframe is a target downlink subframe to be sent.
The base station according to claim 12 or 13, wherein the base station further comprises:

The receiving unit is configured to receive data that is uplinked by the terminal in the target uplink subframe according to the downlink control information.
The base station according to any one of claims 12-14, wherein the determining unit determines that at least two uplink subframes that the target downlink subframe allows to be scheduled is specifically:

Determining, by the determining unit, that the target downlink subframe is allowed to be scheduled in the target uplink and downlink time slot configuration according to the currently adopted target uplink and downlink time slot configuration, and at least one of a preset transmission delay and an uplink channel quality. At least two uplink subframes.
The base station according to any one of claims 12-14, wherein the determining unit determines that at least two uplink subframes that the target downlink subframe allows to be scheduled is specifically:

Determining, by the determining unit, at least two uplink subframes that are allowed to be scheduled in the target uplink and downlink time slot configuration according to the currently used target uplink and downlink time slot configuration and the first preset mapping relationship, where The first preset mapping relationship includes a correspondence between the downlink subframes in the uplink and downlink timeslot configurations and the uplink subframes that are allowed to be scheduled.
The base station according to any one of claims 12-16, wherein the bit length of the UL index is determined by the number of the at least two uplink subframes.
The base station according to any one of claims 12-16, wherein the bit length of the UL index is determined by a currently used target uplink and downlink time slot configuration and a second preset mapping relationship, the second pre- Let the mapping relationship include the correspondence between different uplink and downlink time slot configurations and bit lengths.
A terminal, comprising:

a receiving unit, configured to receive downlink control information that is sent by the base station in the target downlink subframe of the unlicensed spectrum and that carries uplink scheduling information, where the uplink scheduling information includes an uplink index UL index, where the UL index is used to indicate permission to be Decoding the at least two uplink subframes scheduled by the target downlink subframe;

a determining unit, configured to determine, according to the UL index, a target uplink subframe, where the target uplink subframe is an uplink subframe scheduled by the target downlink subframe in the at least two uplink subframes.
The terminal according to claim 19, wherein the terminal further comprises:

a sending unit, configured to send, in the target uplink subframe, the base station according to the downlink control information Send data upstream.
The terminal according to claim 19 or 20, wherein the bit length of the UL index is determined by the number of the at least two uplink subframes.
The terminal according to claim 19 or 20, wherein the bit length of the UL index is determined by a currently configured target uplink and downlink time slot configuration and a preset mapping relationship, where the preset mapping relationship includes different uplink and downlink. The correspondence between the slot configuration and the bit length.