WO2018059272A1

WO2018059272A1 - Data transmission method and device

Info

Publication number: WO2018059272A1
Application number: PCT/CN2017/102231
Authority: WO
Inventors: 罗俊; 张佳胤
Original assignee: 华为技术有限公司
Priority date: 2016-09-28
Filing date: 2017-09-19
Publication date: 2018-04-05
Also published as: CN107872846B; CN107872846A

Abstract

Disclosed are a data transmission method and device. In the data transmission method, a data transmission apparatus can detect whether a large bandwidth channel in an unauthorized frequency band is idle or not, the large bandwidth channel being a continuous bandwidth channel with the bandwidth being greater than 20 MHz and less than or equal to an available bandwidth upper limit in the unauthorized frequency band, and if the large bandwidth channel is detected to be idle, transmit data on the idle large bandwidth channel so as to improve data transmission efficiency.

Description

Data transmission method and device

Technical field

The present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background technique

With the development of mobile Internet and smart terminals, data traffic has shown an explosive growth trend, so the demand for unlicensed frequency bands is getting stronger and stronger. Unlicensed bands have higher frequencies and bandwidths, providing higher data rates and less interference. The unlicensed frequency band includes multiple channels, each of which has a bandwidth of 20 MHz, and each channel is an independent channel, thereby providing rich channel resources for Wireless Local Area Networks (WLANs) for multiple independent channels. How to provide more bandwidth to increase the data transmission rate is an urgent problem to be solved.

Summary of the invention

The present application discloses a data transmission method and device, which can perform large-bandwidth data transmission and improve data transmission rate.

The first aspect of the present application discloses a data transmission method, which includes the data transmission device detecting whether a large bandwidth channel in an unlicensed frequency band is idle, and transmitting data on an idle large bandwidth channel when detecting that the large bandwidth channel is idle. . The large bandwidth channel is a continuous bandwidth channel that is greater than or equal to 20 MHz and is equal to or less than the upper limit of the available bandwidth in the unlicensed frequency band. The upper limit of the available bandwidth may be N times of 20 MHz, and N is an integer greater than 1, and the upper limit of the available bandwidth may be based on different countries. The licensed band is determined by releasing the frequency band used. The embodiment adopts a large bandwidth channel of the unlicensed frequency band, provides a large bandwidth data transmission mode, and improves the data transmission rate.

In one possible design, the data transmission device can detect whether there is at least one free 20 MHz bandwidth channel in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel; if there is at least one idle 20 MHz bandwidth The channel transmits data on the at least one free 20 MHz bandwidth channel. This embodiment may utilize a scattered idle channel in a non-idle, large bandwidth channel to further increase the data transmission rate. The idle large bandwidth can be the same bandwidth as the non-idle large bandwidth to reduce the complexity of channel detection.

In a second possible design, the data transmission device transmits data on the at least one idle 20 MHz bandwidth channel, which may be in a carrier aggregation manner on the at least one idle 20 MHz bandwidth channel and the Data transmission on an idle large bandwidth channel.

In a third possible design, the data transmission device sets the subcarriers of the non-idle 20 MHz bandwidth channel in the non-idle large bandwidth channel to zero, using the idle large bandwidth channel and the non-idle after zeroing. The large bandwidth channel performs data transmission as a whole.

In a fourth possible design, carrier aggregation and zeroing are used to transmit data on idle large bandwidth channels and idle 20 MHz bandwidth channels in non-idle large bandwidth channels, wherein idle bands are utilized. The overall data transmission of the wide channel and the non-idle large bandwidth channel may be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by a Fast Fourier Transformation (FFT).

In a fifth possible design, the data transmission device can detect whether the primary channel of the 20 MHz bandwidth in the unlicensed band is idle before detecting whether the large bandwidth channel in the unlicensed band is idle; if the 20 MHz bandwidth in the unlicensed band The primary channel is idle, and then the large bandwidth channel in the unlicensed frequency band is detected to be idle. The primary channel idle in the 20 MHz bandwidth can ensure the transmission of system information.

In a sixth possible design, the data transmission device detects whether the large bandwidth channel in the unlicensed band is idle, including:

Detecting whether the auxiliary channel of the adjacent 20 MHz bandwidth of the primary channel of the 20 MHz bandwidth is idle;

If the 20MHz bandwidth auxiliary channel is idle, detecting whether the auxiliary channel adjacent to the 40MHz bandwidth of the 20MHz bandwidth auxiliary channel is idle;

If the auxiliary channel of the 40 MHz bandwidth is idle, detecting whether the auxiliary channel of the 80 MHz bandwidth adjacent to the 40 MHz bandwidth auxiliary channel is idle; if the auxiliary channel of the 40 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and idle The bandwidth channel is a primary channel of 40 MHz bandwidth;

If the auxiliary channel of the 80 MHz bandwidth is idle, detecting that the large bandwidth channel that is idle and idle is a primary channel of 160 MHz bandwidth; if the auxiliary channel of the 80 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and idle The large bandwidth channel is the primary channel of the 80 MHz bandwidth.

In the embodiment of the present invention, before detecting data transmission, detecting whether a large bandwidth channel in an unlicensed frequency band is idle may be referred to as performing idle channel estimation for a large bandwidth channel, and using a small to large bandwidth sequence for detecting idle channel estimation. The detection efficiency can be improved, so that the data transmission device can efficiently use the large bandwidth channel for data transmission.

In a seventh possible design, the data transmission device detects whether the large bandwidth channel in the unlicensed band is idle, including:

Detecting whether a channel of 160 MHz continuous bandwidth is idle;

If the 160 MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160 MHz primary channel;

If the 160 MHz continuous bandwidth channel is not idle, detecting whether the 80 MHz bandwidth primary channel and the 80 MHz bandwidth auxiliary channel in the 160 MHz continuous bandwidth channel are idle;

If the primary channel of the 80 MHz bandwidth is idle and the auxiliary channel of the 80 MHz bandwidth is not idle, detecting that the large bandwidth channel that is idle and idle is the primary channel of the 80 MHz bandwidth;

If the primary channel of the 80 MHz bandwidth is not idle and the auxiliary channel of the 80 MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth;

If the 80MHz bandwidth primary channel and the 80MHz bandwidth auxiliary channel are not idle, detecting whether the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel in the 80MHz bandwidth primary channel are idle;

If the primary channel of the 40 MHz bandwidth is idle and the auxiliary channel of the 40 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of 40 MHz bandwidth;

If the primary channel of the 40 MHz bandwidth is not idle and the auxiliary channel of the 40 MHz bandwidth is idle, the large The large bandwidth channel with the bandwidth channel idle and idle is the auxiliary channel of the 40 MHz bandwidth.

The embodiment adopts a sequence of bandwidths from large to small in the evaluation of the idle channel, which improves the detection efficiency, so that the data transmission device can efficiently use the large bandwidth channel for data transmission.

In an eighth possible design, the data transmission device may determine whether to adopt the channel detection order from the small bandwidth to the large bandwidth or the channel detection sequence from the large bandwidth to the small bandwidth based on the historical interference value of the channel, that is, determine the history. If the interference value is greater than the preset threshold, if the threshold is greater than the preset threshold, the channel detection sequence using the foregoing small bandwidth to the large bandwidth is performed; if the threshold is less than or equal to the preset threshold, the channel detection sequence from the large bandwidth to the small bandwidth is performed. . In this embodiment, the historical interference value is relatively small, indicating that the probability of the large bandwidth channel being idle is high, so the channel detection order from large to small is adopted; when the historical interference value is relatively large, the probability that the large bandwidth channel is idle is small, so The channel detection order from small to large is adopted, thereby improving the efficiency of channel detection.

A second aspect of the present application also discloses a data transmission apparatus, which may include a module that performs the data transmission method disclosed in the first aspect of the present application. The detecting module is configured to detect whether a large bandwidth channel in the unlicensed frequency band is idle, and the large bandwidth channel is a continuous bandwidth channel that is greater than 20 MHz and less than or equal to an upper limit of the available bandwidth in the unlicensed frequency band; The detecting module detects that the large bandwidth channel is idle, and transmits data on the idle large bandwidth channel.

In the present application, the data transmission device can detect whether the large bandwidth channel in the unlicensed frequency band is idle, and when detecting that the large bandwidth channel is idle, can transmit data on the idle large bandwidth channel, thereby improving the data transmission rate.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic diagram of multiple independent channels in an unlicensed frequency band according to an embodiment of the present invention;

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

3 is a schematic diagram of a channel evaluation sequence disclosed in an embodiment of the present invention;

4 is a schematic diagram of another channel evaluation sequence disclosed in an embodiment of the present invention;

FIG. 5 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure;

6 is a schematic diagram of still another channel estimation result disclosed in an embodiment of the present invention;

7 is a schematic diagram of still another channel estimation result disclosed in an embodiment of the present invention;

FIG. 8 is a schematic diagram of still another channel estimation result disclosed in an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of still another channel estimation result disclosed in an embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.

detailed description

In order to facilitate the understanding of the embodiments of the present invention, the application scenarios of the embodiments of the present invention are described below. FIG. 1 is a schematic diagram of multiple independent channels in an unlicensed frequency band according to an embodiment of the present invention. As shown in FIG. 1 , each channel is an independent channel and has a bandwidth of 20 MHz, which provides rich channel resources for the WLAN, and adopts a channel. Binding technique Multiple channels can be bundled into one channel. The bound channel can be called a large bandwidth channel, that is, the large bandwidth channel is greater than 20 MHz, and is less than or equal to the continuous bandwidth channel in the unlicensed band. The upper limit may be N times of 20 MHz, and N is an integer greater than 1. The upper limit of the available bandwidth may be determined according to the frequency band range used by countries for unlicensed frequency bands. The embodiment of the present invention is described with an upper limit of available bandwidth of 160 MHz. In the embodiment of the present invention, the primary channel is a default or preferred transport channel, and may also be a transport channel containing system information, and the auxiliary channel refers to a transport channel other than the primary channel.

The data transmission method and apparatus disclosed in the embodiments of the present invention can use a large bandwidth channel of the unlicensed frequency band to provide data transmission with a large bandwidth to improve the data transmission rate. The details are described below separately.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 2, the data transmission method includes the following steps:

S201. The data transmission device detects whether the large bandwidth channel in the unlicensed frequency band is idle. When detecting that the large bandwidth channel is idle, step S202 is performed. When detecting that the large bandwidth channel is not idle, the process ends.

S202. The data transmission device transmits data on an idle large bandwidth channel.

In the embodiment of the present invention, the terminal that performs the data transmission method may be a user equipment such as a mobile phone, a tablet computer, or a portable device on the user side, or a base station device on the base station side, which is collectively referred to herein as a data transmission device.

In the embodiment of the present invention, before the data transmission device performs data transmission, it is required to perform step S201 to detect whether the large bandwidth channel in the unlicensed frequency band is idle, that is, perform idle channel estimation for the large bandwidth channel, and the channel estimation method may include two implementations. The method is described in detail below.

As an alternative embodiment, refer to FIG. 3. FIG. 3 is a schematic diagram of a channel evaluation sequence according to an embodiment of the present invention. Referring to FIG. 3, the data transmission device detects whether a large bandwidth channel in an unlicensed frequency band is idle. The steps can be included:

11) The data transmission device detects whether the auxiliary channel of the adjacent 20 MHz bandwidth of the primary channel of the 20 MHz bandwidth is idle;

12) if the 20MHz bandwidth auxiliary channel is idle, the data transmission device detects whether the auxiliary channel adjacent to the 40MHz bandwidth of the 20MHz bandwidth auxiliary channel is idle;

Optionally, if the secondary channel of the 20 MHz bandwidth is not idle, the primary channel of the 20 MHz bandwidth may be used for data transmission, and the manner of transmitting the data by the primary channel is a single channel transmission, which is not described in detail herein.

13) If the auxiliary channel of the 40 MHz bandwidth is idle, the data transmission device detects whether the auxiliary channel of the 80 MHz bandwidth adjacent to the 40 MHz bandwidth auxiliary channel is idle; if the auxiliary channel of the 40 MHz bandwidth is not idle, the data transmission device detects the large bandwidth channel. The idle and idle large bandwidth channel is the main channel of 40 MHz bandwidth;

Wherein, when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel of 40 MHz bandwidth, the main channel of the 40 MHz bandwidth is as shown in FIG. 3, and the data transmission device can transmit on the main channel of the 40 MHz bandwidth. data.

14) If the auxiliary channel of the 80 MHz bandwidth is idle, the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel of 160 MHz bandwidth; if the auxiliary channel of the 80 MHz bandwidth is not idle, the data transmission device detects the large bandwidth. The large bandwidth channel with the channel idle and idle is the main channel of the 80 MHz bandwidth.

In the embodiment of the present invention, when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel of 160 MHz bandwidth, the main channel of the 160 MHz bandwidth is as shown in FIG. 3, and the data transmission device may be in Data is transmitted on the main channel of the 160 MHz bandwidth. Optionally, when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth, the primary channel of the 80 MHz bandwidth is as shown in FIG. 3, and the data transmission device may be in the primary channel of the 80 MHz bandwidth. Transfer data on.

The embodiment can detect the bandwidth of the large-bandwidth channel from small to large, and improve the detection efficiency, so that the data transmission device can efficiently use the large-bandwidth channel for data transmission.

As another alternative implementation manner, refer to FIG. 4. FIG. 4 is a schematic diagram of another channel evaluation sequence disclosed in the embodiment of the present invention. In combination with the FIG. 4, the data transmission device detects a large bandwidth channel in an unlicensed frequency band. Whether it is free or not, you can include the following steps:

21) The data transmission device detects whether the channel of 160 MHz continuous bandwidth is idle;

22) If the 160 MHz continuous bandwidth channel is idle, the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 160 MHz primary channel; if the 160 MHz continuous bandwidth channel is not idle, the data transmission device detects 160 MHz continuous bandwidth. Whether the primary channel of the 80 MHz bandwidth in the channel and the auxiliary channel of the 80 MHz bandwidth are idle;

23) If the primary channel of the 80 MHz bandwidth is idle and the auxiliary channel of the 80 MHz bandwidth is not idle, the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth; if the primary channel of the 80 MHz bandwidth is not idle and When the auxiliary channel of the 80 MHz bandwidth is idle, the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel of the 80 MHz bandwidth; if the primary channel of the 80 MHz bandwidth and the auxiliary channel of the 80 MHz bandwidth are not idle, the data transmission device Detecting whether the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel in the main channel of the 80MHz bandwidth are idle;

24) If the 40MHz bandwidth primary channel is idle and the 40MHz bandwidth auxiliary channel is not idle, the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is the 40MHz bandwidth primary channel; if the 40MHz bandwidth primary channel is not The idle and 40 MHz bandwidth auxiliary channels are idle, and the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 40 MHz bandwidth auxiliary channel.

Optionally, the data transmission device may also detect whether there is a 40 MHz bandwidth auxiliary channel in the auxiliary channel of the 80 MHz bandwidth, and if there is a 40 MHz bandwidth auxiliary channel, detect that the large bandwidth channel is idle and the idle large bandwidth channel is 40 MHz bandwidth auxiliary. channel.

The embodiment can detect the bandwidth of the large bandwidth channel from large to small, and improve the detection efficiency, so that the data transmission device can efficiently use the large bandwidth channel for data transmission. In addition, the data transmission device detects that the idle large bandwidth channel can be a large bandwidth primary channel or a large bandwidth auxiliary channel. For example, the data transmission device detects that the primary channel of the 80 MHz bandwidth is not idle and the auxiliary channel of the 80 MHz bandwidth is idle. When the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth; when the data transmission device detects that the primary channel idle of the 80 MHz bandwidth and the auxiliary channel of the 80 MHz bandwidth are not idle, the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth.

As a further optional implementation manner, the data transmission device may determine, according to the historical interference value of the channel, whether to adopt the channel detection sequence from the small bandwidth to the large bandwidth, or the channel detection sequence from the large bandwidth to the small bandwidth, which may be specific. for:

The data transmission device determines whether the historical interference value is greater than a preset threshold. If the threshold is greater than the preset threshold, the foregoing step 11) is performed; if the threshold is less than the preset threshold, the foregoing step 21) is performed.

The historical interference value may be a signal to interference ratio (SINR) of the measurement signal, that is, a ratio of the received useful signal power to the received interference signal power, and the ratio is larger. The better the channel environment is, the higher the transmission rate is. Therefore, the signal to interference and noise ratio should be set to a negative value and then compared with the preset threshold. The historical interference value can also be the received power of the measurement signal (RSRP, Reference Signal Received). Power) or Received Signal Strength Indicator (RSSI) indicates that RSRP is an important indicator to measure cell coverage. RSSI is within a certain measurement bandwidth. The total received power on the pilot symbols is within the measurement period. The average value, if RSRP or RSRP is used to measure the size of historical interference, the RSRP or RSRP should also be set to a negative value and then compared with the preset threshold. That is, the larger the historical interference value, the larger the historical interference and the historical interference value. The smaller, the smaller the historical interference. In addition, when the data transmission device is a user equipment, the user equipment may obtain the historical interference value from the base station side device, or obtain a comparison result between the historical interference value and the preset threshold from the base station side device.

In this embodiment, the historical interference value is relatively small, indicating that the probability of the large bandwidth channel being idle is high, so the channel detection sequence from the large bandwidth to the small bandwidth is adopted; the historical interference value is relatively large, indicating that the probability of the large bandwidth channel being idle is small. Therefore, the channel detection order from small bandwidth to large bandwidth is adopted, thereby improving the efficiency of channel detection.

As a further optional implementation, before the step S201 is performed, the data transmission device needs to detect whether the primary channel of the 20 MHz bandwidth in the unlicensed band is idle. If the primary channel of the 20 MHz bandwidth is idle, the idle process described above may be performed. Channel evaluation method.

It can be seen that the embodiment of the present invention can detect the large bandwidth channel that is idle in the unlicensed frequency band, and transmit data on the idle large bandwidth channel, which greatly improves the data transmission rate compared with the channel using the independent 20 MHz bandwidth.

Referring to FIG. 5, FIG. 5 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present invention. The data transmission method is different from the data transmission method in the foregoing embodiment in that the data transmission device can also utilize idle large bandwidth. At least one idle 20 MHz bandwidth channel existing in the non-idle large bandwidth channel adjacent to the channel is used for data transmission. Specifically, as shown in FIG. 5, the data transmission method may include the following steps:

S501: The data transmission device detects whether the large bandwidth channel in the unlicensed frequency band is idle. When it is detected that the large bandwidth channel is idle, step S502 is performed; otherwise, the process ends.

S502: The data transmission device detects whether at least one idle 20 MHz bandwidth channel exists in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel, and when detecting that there is at least one idle 20 MHz bandwidth channel, performing steps S503, otherwise the process ends;

S503. The data transmission device transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

As an optional implementation manner, the data transmission device transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel, where:

The carrier aggregation is used to transmit data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

As another optional implementation manner, the data transmission device may transmit data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

The subcarriers of the non-idle 20 MHz bandwidth channel in the non-idle large bandwidth channel are set to zero, and the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for data transmission.

Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole may be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by a Fast Fourier Transformation (FFT).

As still another optional implementation manner, the data transmission device transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel, where:

The subcarriers of some non-idle 20MHz bandwidth channels in the non-idle large bandwidth channel are set to zero; the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for carrier data transmission in a carrier aggregation manner. Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole may be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by a Fast Fourier Transformation (FFT).

6 is a schematic diagram of a channel estimation result disclosed by an embodiment of the present invention. FIG. 6 is used as an example to illustrate that a data transmission device may perform data on an idle large bandwidth channel and a non-idle bandwidth channel by using zero or carrier aggregation. transmission. As shown in FIG. 6, the data transmission device detects that the idle large bandwidth channel is a primary channel of 40 MHz bandwidth, and detects that there is a 20 MHz bandwidth in the auxiliary channel of the 40 MHz bandwidth of the same non-idle bandwidth of the 40 MHz bandwidth adjacent to the primary channel. Channel, the 40MHz bandwidth primary channel and the 20MHz bandwidth channel are combined into one channel to transmit data in a carrier aggregation manner; or the non-idle 20MHz bandwidth channel in the 40MHz bandwidth auxiliary channel may be used. The carrier is set to zero, and the 40MHz bandwidth primary channel and the non-idle 40MHz bandwidth auxiliary channel are bundled into one channel for data transmission, and the Fourier transform FFT uses the bound channel for data transmission. It can be seen that the bandwidth after channel binding in this embodiment is 60 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission methods.

For example, please refer to FIG. 7. FIG. 7 is a schematic diagram of a channel estimation result according to an embodiment of the present invention, and FIG. 7 is used as an example to illustrate that a data transmission device can adopt a zero or carrier aggregation manner in a large idle bandwidth. Data transmission is performed on the channel and on the non-idle bandwidth channel. As shown in FIG. 7, the data transmission device detects that the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth, and detects that there are three idle channels in the 80 MHz bandwidth main channel adjacent to the non-idle bandwidth of the 80 MHz bandwidth auxiliary channel. The 20 MHz bandwidth channel is used to combine the 80 MHz bandwidth auxiliary channel and the three idle 20 MHz bandwidth channels into one channel in a carrier aggregation manner, and uses the bound channel to transmit data; or can transmit 80 MHz bandwidth. The subcarriers on the non-idle 20MHz bandwidth channel in the primary channel are set to zero, and the primary channel of the 80MHz bandwidth and the auxiliary channel of the 80MHz bandwidth are bound into one channel, and the data is bounded by the Fourier transform FFT using the bound channel. transmission. It can be seen that the bandwidth after channel binding in this embodiment is 140 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission methods.

It should be noted that the premise that the data transmission device utilizes the 20 MHz bandwidth channel that is idle in the non-idle large bandwidth may be that the non-idle large bandwidth is adjacent to the detected idle large bandwidth, and the idle large bandwidth is different. The bandwidth of the idle large bandwidth is the same, which can reduce the complexity of channel detection and data transmission.

For example, please refer to FIG. 8. FIG. 8 is a schematic diagram of still another channel estimation result disclosed in the embodiment of the present invention. FIG. 8 is used as an example to illustrate that the data transmission device can be idle or large in a manner of zero or carrier aggregation. Belt Data transmission over wide channels and non-idle bandwidth channels. As shown in FIG. 8, the data transmission device detects that the idle large bandwidth channel is a primary channel of 40 MHz bandwidth, and detects that there is an idle channel in the 40 MHz bandwidth auxiliary channel adjacent to the non-idle bandwidth of the 40 MHz bandwidth main channel. a channel of 20 MHz bandwidth, in addition, detecting that the auxiliary channel of the 40 MHz bandwidth adjacent to the auxiliary channel of the non-idle 80 MHz bandwidth exists, and the auxiliary channel of the 80 MHz bandwidth has an idle 20 MHz bandwidth channel, and the data transmission device can use the 40 MHz bandwidth. The bandwidth of the primary channel and the 40MHz bandwidth of the auxiliary channel of the 40MHz bandwidth are bound to one channel, and no longer the free 20MHz bandwidth channel in the auxiliary channel of the non-idle 80MHz bandwidth, avoiding the complexity of the system. That is, the bandwidth of data transmission is 60MHz instead of 120MHz.

For example, please refer to FIG. 9. FIG. 9 is a schematic diagram of still another channel estimation result disclosed by the embodiment of the present invention. FIG. 9 is used as an example to illustrate that the data transmission device can adopt the method of zeroing and carrier aggregation in idle mode. Data transmission over large bandwidth channels and non-idle bandwidth channels. As shown in FIG. 9, the idle large bandwidth channel detected by the data transmission device is a primary channel of 40 MHz bandwidth, and the detected non-idle large bandwidth channel is a non-adjacent 40 MHz bandwidth auxiliary channel, where the unlicensed frequency band is in the unlicensed frequency band. The 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel may be separated by multiple independent channels, or the two are respectively located in different frequency bands, and the data transmission device may be a non-idle 20MHz bandwidth channel in the 40MHz bandwidth auxiliary channel. After the subcarriers are set to zero, the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel are combined into one channel for data transmission in a carrier aggregation manner. It can be seen that the bandwidth after channel binding in this embodiment is 60 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission methods.

It can be seen that the data transmission method shown in FIG. 5 can flexibly utilize the idle scattered bandwidth in the large bandwidth, further increase the data transmission bandwidth, and improve the data transmission rate.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 10, the data transmission apparatus may include: a detection module 101 and a transmission module 102, where:

The detecting module 101 is configured to detect whether a large bandwidth channel in the unlicensed frequency band is idle, and the large bandwidth channel is a continuous bandwidth channel that is greater than or equal to the upper limit of the available bandwidth in the unlicensed frequency band.

The transmitting module 102 is configured to transmit data on the idle large bandwidth channel when the detecting module 101 detects that the large bandwidth channel is idle.

In the embodiment of the present invention, before the data transmission device performs data transmission, the detection module 101 needs to detect whether the large bandwidth channel in the unlicensed frequency band is idle. The detection process is also referred to as a Clear Channel Assessment (CCA). As an optional implementation, the detecting module 101 can detect the sequence from the small bandwidth to the large bandwidth, as described in the corresponding embodiment of FIG. 3, including steps 11) to 14) in the foregoing embodiment of the invention, where More details.

As another optional implementation manner, the detecting module 101 detects whether the large bandwidth channel in the unlicensed frequency band is idle, and may detect the sequence from the large bandwidth to the small bandwidth, as described in the embodiment corresponding to FIG. 4, including the steps. 21) to step 24), which will not be described in detail here.

As still another optional implementation manner, the data transmission device may determine, according to the historical interference value of the channel, whether the detection module 101 adopts the channel detection sequence from the small bandwidth to the large bandwidth, or the channel detection sequence from the large bandwidth to the small bandwidth. Therefore, the data transmission device may further include:

The first determining module 103 is configured to determine whether the historical interference value is greater than a preset threshold. If the historical interference value is greater than the preset threshold, the trigger detection module 101 performs the auxiliary channel of detecting a 20 MHz bandwidth adjacent to the primary channel of the 20 MHz bandwidth. The step of being idle, that is, the channel detection order from small bandwidth to large bandwidth;

The second determining module 104 is configured to determine whether the historical interference value is less than a preset threshold; if the historical interference value is less than the preset threshold, the trigger detecting module 101 performs the step of detecting whether the channel of the 160 MHz bandwidth is idle, that is, from the large bandwidth. Channel detection order to small bandwidth.

The historical interference value may be a signal to interference ratio (SINR) of the measurement signal, that is, a ratio of the received useful signal power to the received interference signal power, and the ratio is larger. The better the channel environment is, the higher the transmission rate is. Therefore, the signal to interference and noise ratio should be set to a negative value and then compared with the preset threshold. The historical interference value can also be the received power of the measurement signal (RSRP, Reference Signal Received). Power) or Received Signal Strength Indicator (RSSI) indicates that RSRP is an important indicator to measure cell coverage. RSSI is within a certain measurement bandwidth. The total received power on the pilot symbols is within the measurement period. The average value, if RSRP or RSRP is used to measure the size of historical interference, the RSRP or RSRP should also be set to a negative value and then compared with the preset threshold. That is, the larger the historical interference value, the larger the historical interference and the historical interference value. The smaller, the smaller the historical interference. In addition, when the data transmission device is a user equipment, the user equipment may obtain the historical interference value from the base station side device, or obtain a comparison result between the historical interference value and the preset threshold from the base station side device. In this embodiment, the historical interference is relatively small, indicating that the probability of the large bandwidth channel being idle is high, so the idle channel estimation method from large to small is adopted; when the historical interference is relatively large, the probability that the large bandwidth channel is idle is small, so the adoption is small. The idle channel evaluation method from small to large improves the efficiency of channel estimation.

As a further optional implementation, before detecting whether the large bandwidth channel in the unlicensed frequency band is idle, the detecting module 101 needs to detect whether the primary channel of the 20 MHz bandwidth in the unlicensed frequency band is idle, if the 20 MHz bandwidth is available. If the primary channel is idle, the idle channel estimation method described above can be performed.

As an optional implementation manner, in the data transmission apparatus, the transmission module can not only transmit data by using a large idle bandwidth, but also use at least one idle 20 MHz bandwidth channel existing in the non-idle large-bandwidth channel for data transmission. . The idle large bandwidth channel may be adjacent to the non-idle large bandwidth channel, and the two may also be the same size bandwidth, thereby reducing the complexity of the idle channel assessment detection.

The detecting module 101 detects whether the large bandwidth channel in the unlicensed frequency band is idle, and detects whether at least one idle 20 MHz bandwidth channel exists in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel, and correspondingly, The transmission module 102 can transmit data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

As an optional implementation manner, the transmission module 102 transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel:

As another optional implementation manner, the transmission module 102 transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

The subcarriers of the non-idle 20 MHz bandwidth channel in the non-idle large bandwidth channel are set to zero, and the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for data transmission. Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole may be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by a Fast Fourier Transformation (FFT).

As shown in FIG. 6, the detecting module 101 detects that the idle large bandwidth channel is a main channel of 40 MHz bandwidth, and detects that there is a 20 MHz bandwidth in the auxiliary channel of the 40 MHz bandwidth of the non-idle bandwidth of the 40 MHz bandwidth adjacent to the main channel. The transmission module 102 may combine the 40 MHz bandwidth primary channel and the 20 MHz bandwidth channel into one channel in a carrier aggregation manner, and transmit the data by using the bundled channel; or the transmission module 102 may use a 40 MHz bandwidth. The subcarriers on the non-idle 20MHz bandwidth channel in the auxiliary channel are set to zero, and the 40MHz bandwidth primary channel and the non-idle 40MHz bandwidth auxiliary channel are combined into one channel for data transmission, and utilized by a fast Fourier transform FFT. The bound channel is used for data transmission. It can be seen that the bandwidth after channel binding in this embodiment is 60 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission devices.

For example, as shown in FIG. 7, the detecting module 101 detects that the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth, and detects a non-idle 80 MHz bandwidth main channel adjacent to the auxiliary channel of the 80 MHz bandwidth. There are three idle 20MHz bandwidth channels, and the transmission module 102 combines the 80MHz bandwidth auxiliary channel and the three idle 20MHz bandwidth channels into one channel in a carrier aggregation manner, and uses the bundled channel transmission. Data; or the transmission module 102 can zero the subcarriers on the non-idle 20MHz bandwidth channel in the 80MHz bandwidth primary channel, and bind the 80MHz bandwidth primary channel and the 80MHz bandwidth auxiliary channel to one channel to one channel. The leaf transform FFT uses the bonded channel for data transmission. It can be seen that the bandwidth after channel binding in this embodiment is 140 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission devices.

For example, as shown in FIG. 8, the detecting module 101 detects that the idle large bandwidth channel is a 40 MHz bandwidth primary channel, and detects the 40 MHz bandwidth adjacent channel of the non-idle 40 MHz bandwidth auxiliary channel of the same bandwidth. There is an idle 20MHz bandwidth channel. In addition, it is detected that the 40MHz bandwidth auxiliary channel has a non-idle 80MHz bandwidth auxiliary channel adjacent to the auxiliary channel of the 80MHz bandwidth, and the idle 20MHz bandwidth channel exists, and the data transmission is performed. The device can bind the 40MHz bandwidth primary channel and the idle 20MHz bandwidth channel in the 40MHz bandwidth auxiliary channel to one channel, and no longer bind the idle 20MHz bandwidth channel in the non-idle 80MHz bandwidth auxiliary channel, avoiding Increase the complexity of channel detection or data transmission, that is, the bandwidth of data transmission is 60MHz instead of 120MHz.

As still another optional implementation manner, the transmitting module 102 transmits data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel, where:

The subcarriers of some non-idle 20MHz bandwidth channels in the non-idle large bandwidth channel are set to zero; the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for carrier data transmission in a carrier aggregation manner.

For example, as shown in FIG. 9, the idle large bandwidth channel detected by the data transmission device is a primary channel of 40 MHz bandwidth, and the detected non-idle large bandwidth channel is a non-adjacent 40 MHz bandwidth auxiliary channel, where In the unlicensed frequency band, the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel may be separated by multiple independent channels, or the two are respectively located in different frequency bands, for example, respectively located in the 5Ghz frequency band and the 70GHz frequency band, then the data transmission device may After the subcarriers of the non-idle 20 MHz bandwidth channel in the 40 MHz bandwidth auxiliary channel are set to zero, the 40 MHz bandwidth primary channel and the 40 MHz bandwidth auxiliary channel are combined into one channel for data transmission in a carrier aggregation manner. It can be seen that the bandwidth after channel binding in this embodiment is 60 MHz, which increases the data transmission bandwidth and improves the data transmission rate compared with other data transmission methods.

It can be seen that the data transmission apparatus shown in FIG. 10 can flexibly utilize the idle scattered bandwidth in the large bandwidth, further increase the data transmission bandwidth, and improve the data transmission rate.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention. As shown in FIG. 11, the data transmission device may include, but is not limited to, a memory 111, a communication interface 112, and a processor 113. The communication interface 112 is configured to transmit data, and the memory 111 is configured to store historical interference values detected by the processor 113 or to receive historical interference values transmitted by other data transmission devices.

The communication interface 112 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless communication interface can be a WLAN interface, a cellular network communication interface, or a combination thereof. The memory 113 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory may also include a non-volatile memory (English: non-volatile memory) For example, flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviated: HDD) or solid state drive (English: solid-state drive, abbreviation: SSD); the memory 111 may also include the above types of memory combination. The processor 113 may be a central processing unit (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of a CPU and an NP. The processor 113 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (abbreviated as PLD), or a combination thereof. The above PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: generic array Logic, abbreviation: GAL) or any combination thereof.

In the embodiment of the present invention, the processor 113 is configured to detect whether a large bandwidth channel in the unlicensed frequency band is idle, wherein the large bandwidth channel is a continuous bandwidth channel that is greater than 20 MHz and less than or equal to the upper limit of the available bandwidth in the unlicensed frequency band; When the device 113 detects that the large bandwidth channel is idle, the data can be transmitted over the idle large bandwidth channel through the communication interface 112.

In the embodiment of the present invention, before the processor 113 performs data transmission through the communication interface 112, it is required to detect the non- Whether the large bandwidth channel in the licensed band is idle, the detection process is also called Clear Channel Assessment (CCA). As an optional implementation manner, the processor 113 may detect the sequence from a small bandwidth to a large bandwidth. As described in the corresponding embodiment of FIG. 3, the following steps are performed:

In the embodiment of the present invention, when the processor 113 detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel of the 160 MHz bandwidth, the main channel of the 160 MHz bandwidth is as shown in FIG. 3, and the data transmission device can be in the 160 MHz bandwidth. Data is transmitted on the primary channel. Optionally, when the processor 113 detects that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth, the primary channel of the 80 MHz bandwidth is as shown in FIG. 3, and the processor 113 may be in the primary channel of the 80 MHz bandwidth. Transfer data on.

As another optional implementation manner, the processor 113 detects whether the large bandwidth channel in the unlicensed frequency band is idle, and may detect the sequence from the large bandwidth to the small bandwidth, as described in the corresponding embodiment of FIG. 4, including the following. step:

Detecting whether a channel of 160 MHz continuous bandwidth is idle;

If the primary channel of the 40 MHz bandwidth is not idle and the auxiliary channel of the 40 MHz bandwidth is idle, it is detected that the large bandwidth channel that is idle and idle is a secondary channel of 40 MHz bandwidth.

Optionally, the processor 113 can also detect whether there is a 40 MHz bandwidth in the auxiliary channel of the 80 MHz bandwidth. The auxiliary channel, if there is a 40MHz bandwidth auxiliary channel, detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 40MHz bandwidth auxiliary channel.

The embodiment can detect the bandwidth of the large bandwidth channel from large to small, and improve the detection efficiency, so that the data transmission device can efficiently use the large bandwidth channel for data transmission. In addition, the idle large bandwidth channel detected by the data transmission device may be a large bandwidth primary channel or a large bandwidth auxiliary channel, for example, the data transmission device detects a primary channel non-idle of 80 MHz bandwidth and an auxiliary channel of 80 MHz bandwidth. When idle, the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth; when the data transmission device detects that the primary channel idle of the 80 MHz bandwidth and the auxiliary channel of the 80 MHz bandwidth are not idle, the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth.

In the embodiment of the present invention, before the processor 113 detects whether the large bandwidth channel in the unlicensed frequency band is idle, the following steps may be performed:

Detecting whether the primary channel of the 20 MHz bandwidth in the unlicensed band is idle;

And if the primary channel of the 20 MHz bandwidth in the unlicensed frequency band is idle, performing the step of detecting whether the large bandwidth channel in the unlicensed frequency band is idle.

As still another optional implementation manner, the processor 113 may determine, according to the historical interference value of the channel, whether to adopt the idle channel estimation method from the small bandwidth to the large bandwidth, or the foregoing idle channel evaluation method from a large bandwidth to a small bandwidth. The steps can be included:

Determining whether the historical interference value is greater than a preset threshold;

If the historical interference value is greater than the preset threshold, the step of detecting whether the auxiliary channel of the 20 MHz bandwidth adjacent to the primary channel of the 20 MHz bandwidth is idle is performed, that is, the channel detection sequence from the small bandwidth to the large bandwidth.

If the historical interference value is less than or equal to the preset threshold, the step of detecting whether the channel of the 160 MHz bandwidth is idle is performed, that is, the channel detection sequence from the large bandwidth to the small bandwidth.

Optionally, the data transmission device may further perform data transmission by using at least one idle 20 MHz bandwidth channel existing in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel. Specifically, the processor 113 may perform the following steps:

Detecting whether there is at least one free 20 MHz bandwidth channel in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel;

If there is at least one free 20 MHz bandwidth channel, data is transmitted on the at least one free 20 MHz bandwidth channel.

The idle large bandwidth channel has the same bandwidth as the non-idle large bandwidth channel, thereby reducing the complexity of channel detection.

As an optional implementation manner, the processor 113 may transmit data on the at least one idle 20 MHz bandwidth channel, specifically in a carrier aggregation manner on the at least one idle 20 MHz bandwidth channel, and Data transmission on an idle large bandwidth channel.

As another optional implementation manner, the processor 113 may use the channel of the at least one idle 20 MHz bandwidth in the determined non-idle large bandwidth channel to transmit data, specifically, the non-idle large bandwidth channel. The subcarriers of the channel of the 20 MHz bandwidth of the idle channel in China are zeroed, and the data transmission is performed by using the idle large bandwidth channel and the non-idle large bandwidth channel after zeroing. Among them, the use of idle large bandwidth channels and non-idle The overall bandwidth transmission of the large bandwidth channel may be to transmit data on an idle large bandwidth channel and a non-idle large bandwidth channel by a Fast Fourier Transformation (FFT). For details, refer to the related descriptions of FIG. 6 to FIG. 8 in the foregoing embodiments, which are not described in detail in the embodiments of the present invention.

As still another optional implementation manner, the processor 113 may transmit data on the idle large bandwidth channel and on the at least one idle 20 MHz bandwidth channel.

The subcarriers of some non-idle 20MHz bandwidth channels in the non-idle large bandwidth channel are set to zero; the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for carrier data transmission in a carrier aggregation manner. For details, refer to the related description of FIG. 9 in the foregoing embodiment, which is not described in detail in the embodiments of the present invention.

Further, the data transmission device shown in FIG. 11 can flexibly utilize the idle scattered bandwidth in the large bandwidth, further increase the data transmission bandwidth, and improve the data transmission rate.

The data transmission method and device disclosed in the embodiments of the present invention are described in detail. The principles and implementations of the present invention are described in the following. The description of the above embodiments is only for helping to understand the present invention. The method and its core idea; at the same time, those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. In summary, the contents of this specification should not be construed as Limitations of the invention.

Claims

A data transmission method, comprising:

Detecting whether a large bandwidth channel in an unlicensed frequency band is idle, and the large bandwidth channel is a continuous bandwidth channel that is greater than 20 MHz and less than or equal to an upper bandwidth limit in the unlicensed frequency band;

When it is detected that the large bandwidth channel is idle, data is transmitted on the idle large bandwidth channel.
The method of claim 1 further comprising:

Detecting whether there is at least one free 20 MHz bandwidth channel in the non-idle large bandwidth channel adjacent to the idle large bandwidth channel;

If there is at least one free 20 MHz bandwidth channel, data is transmitted on the at least one free 20 MHz bandwidth channel.
The method of claim 2 wherein said free large bandwidth channel is the same bandwidth as said non-idle large bandwidth channel.
The method according to claim 2 or 3, wherein said transmitting data on said at least one idle 20 MHz bandwidth channel comprises:

Data transmission is performed on the at least one idle 20 MHz bandwidth channel and the idle large bandwidth channel in a carrier aggregation manner.
The method according to claim 2 or 3, wherein the transmitting data by using the at least one idle 20 MHz bandwidth channel in the determined non-idle large bandwidth channel comprises:

The subcarriers of the non-idle 20 MHz bandwidth channel in the non-idle large bandwidth channel are set to zero, and the idle large bandwidth channel and the zeroed non-idle large bandwidth channel are used for data transmission as a whole.
The method according to any one of claims 1 to 5, wherein the method further comprises:

Detecting whether the primary channel of the 20 MHz bandwidth in the unlicensed band is idle;

And if the primary channel of the 20 MHz bandwidth in the unlicensed frequency band is idle, performing the step of detecting whether the large bandwidth channel in the unlicensed frequency band is idle.
The method according to any one of claims 1 to 6, wherein the detecting whether the large bandwidth channel in the unlicensed frequency band is idle comprises:

Detecting whether the auxiliary channel of the adjacent 20 MHz bandwidth of the primary channel of the 20 MHz bandwidth is idle;

If the 20MHz bandwidth auxiliary channel is idle, detecting whether the auxiliary channel adjacent to the 40MHz bandwidth of the 20MHz bandwidth auxiliary channel is idle;

If the auxiliary channel of the 40 MHz bandwidth is idle, detecting whether the auxiliary channel of the 80 MHz bandwidth adjacent to the 40 MHz bandwidth auxiliary channel is idle; if the auxiliary channel of the 40 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and idle The bandwidth channel is a primary channel of 40 MHz bandwidth;

If the auxiliary channel of the 80 MHz bandwidth is idle, detecting that the large bandwidth channel that is idle and idle is a primary channel of 160 MHz bandwidth; if the auxiliary channel of the 80 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and idle The large bandwidth channel is the primary channel of the 80 MHz bandwidth.
The method according to any one of claims 1 to 6, wherein the detecting whether the large bandwidth channel in the unlicensed frequency band is idle comprises:

Detecting whether a channel of 160 MHz continuous bandwidth is idle;

If the 160 MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160 MHz primary channel;

If the 160 MHz continuous bandwidth channel is not idle, detecting whether the 80 MHz bandwidth primary channel and the 80 MHz bandwidth auxiliary channel in the 160 MHz continuous bandwidth channel are idle;

If the primary channel of the 80 MHz bandwidth is idle and the auxiliary channel of the 80 MHz bandwidth is not idle, detecting that the large bandwidth channel that is idle and idle is the primary channel of the 80 MHz bandwidth;

If the primary channel of the 80 MHz bandwidth is not idle and the auxiliary channel of the 80 MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth;

If the 80MHz bandwidth primary channel and the 80MHz bandwidth auxiliary channel are not idle, detecting whether the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel in the 80MHz bandwidth primary channel are idle;

If the primary channel of the 40 MHz bandwidth is idle and the auxiliary channel of the 40 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of 40 MHz bandwidth;

If the primary channel of the 40 MHz bandwidth is not idle and the auxiliary channel of the 40 MHz bandwidth is idle, it is detected that the large bandwidth channel that is idle and idle is a secondary channel of 40 MHz bandwidth.
The method of claim 7, wherein the method further comprises:

Determining whether the historical interference value is greater than a preset threshold;

If the historical interference value is greater than the preset threshold, performing the step of detecting whether the auxiliary channel of the 20 MHz bandwidth adjacent to the primary channel of the 20 MHz bandwidth is idle.
The method of claim 8 further comprising:

Determining whether the historical interference value is less than a preset threshold;

If the historical interference value is less than the preset threshold, performing the step of detecting whether the channel of the 160 MHz bandwidth is idle.
A data transmission device, comprising:

a detecting module, configured to detect whether a large bandwidth channel in an unlicensed frequency band is idle, and the large bandwidth channel is a continuous bandwidth channel that is greater than or equal to 20 MHz and less than or equal to an upper bandwidth limit in the unlicensed frequency band;

And a transmission module, configured to transmit data on the idle large bandwidth channel when the detecting module detects that the large bandwidth channel is idle.
The apparatus according to claim 11, wherein the detecting module is further configured to detect whether at least one idle 20 MHz bandwidth channel exists in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel. ;

The transmitting module is configured to transmit data on the at least one idle 20 MHz bandwidth channel when there is at least one idle 20 MHz bandwidth channel in the non-idle large bandwidth channel.
The apparatus according to claim 12, wherein said free large bandwidth channel has the same bandwidth as said non-idle large bandwidth channel.
The apparatus according to claim 12 or 13, wherein said transmission module transmits data on said at least one idle 20 MHz bandwidth channel, specifically in a carrier aggregation manner in said at least one idle 20 MHz bandwidth Data transmission is performed on the channel and on the idle large bandwidth channel.
The apparatus according to claim 12 or 13, wherein the transmission module transmits data by using the at least one idle 20 MHz bandwidth channel in the determined non-idle large bandwidth channel, specifically The subcarriers of the channels of the non-idle 20 MHz bandwidth in the idle large bandwidth channel are set to zero, and the data transmission is performed by using the idle large bandwidth channel and the non-idle large bandwidth channel after zeroing.
The apparatus according to any one of claims 11 to 15, wherein the detecting module is further configured to detect whether a primary channel of a 20 MHz bandwidth in the unlicensed frequency band is idle; if the 20 MHz bandwidth in the unlicensed frequency band If the primary channel is idle, the step of detecting whether the large bandwidth channel in the unlicensed frequency band is idle is performed.
The device according to any one of claims 11 to 16, wherein the detecting module detects whether a large bandwidth channel in an unlicensed frequency band is idle, specifically:

Detecting whether the auxiliary channel of the adjacent 20 MHz bandwidth of the primary channel of the 20 MHz bandwidth is idle;

If the 20MHz bandwidth auxiliary channel is idle, detecting whether the auxiliary channel adjacent to the 40MHz bandwidth of the 20MHz bandwidth auxiliary channel is idle;

If the 40MHz bandwidth auxiliary channel is idle, detecting whether the 40MHz bandwidth auxiliary channel adjacent to the 40MHz bandwidth auxiliary channel is idle; if the 40MHz bandwidth auxiliary channel is not idle, detecting the large bandwidth channel idle and idle large bandwidth channel a primary channel of 40 MHz bandwidth;

If the auxiliary channel of the 80 MHz bandwidth is idle, the large bandwidth channel with the large bandwidth channel idle and idle is detected as the primary channel of 160 MHz bandwidth; if the auxiliary channel of the 80 MHz bandwidth is not idle, the large bandwidth channel with the large bandwidth channel idle and idle is detected. It is the main channel of the 80MHz bandwidth.
The device according to any one of claims 11 to 16, wherein the detecting module detects whether a large bandwidth channel in an unlicensed frequency band is idle, specifically:

Detecting whether a channel of 160 MHz continuous bandwidth is idle;

If the 160 MHz continuous bandwidth channel is idle, the large bandwidth channel that is idle and idle is detected as a 160 MHz primary channel;

If the 160 MHz continuous bandwidth channel is not idle, detecting whether the 80 MHz bandwidth primary channel and the 80 MHz bandwidth auxiliary channel in the 160 MHz continuous bandwidth channel are idle;

If the primary channel of the 80 MHz bandwidth is idle and the auxiliary channel of the 80 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of the 80 MHz bandwidth;

If the primary channel of the 80 MHz bandwidth is not idle and the auxiliary channel of the 80 MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is an auxiliary channel of 80 MHz bandwidth;

If the 80MHz bandwidth primary channel and the 80MHz bandwidth auxiliary channel are not idle, detecting whether the 40MHz bandwidth primary channel and the 40MHz bandwidth auxiliary channel in the 80MHz bandwidth primary channel are idle;

If the primary channel of the 40 MHz bandwidth is idle and the auxiliary channel of the 40 MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the primary channel of 40 MHz bandwidth;

If the primary channel of the 40 MHz bandwidth is not idle and the auxiliary channel of the 40 MHz bandwidth is idle, it is detected that the large bandwidth channel is idle and the idle large bandwidth channel is a 40 MHz bandwidth auxiliary channel.
The device according to claim 17, wherein the device further comprises:

a first determining module, configured to determine whether a historical interference value is greater than a preset threshold, and if the historical interference value is greater than a preset threshold, triggering the detecting module to perform the detecting the 20 MHz bandwidth of the primary channel adjacent to the 20 MHz bandwidth The step of whether the auxiliary channel is idle.
The device of claim 18, wherein the device further comprises:

And a second determining module, configured to determine whether the historical interference value is less than a preset threshold; if the historical interference value is less than the preset threshold, triggering the detecting module to perform the step of detecting whether the channel of the 160 MHz bandwidth is idle.
A computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1-10.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-10.