CN107872846B - Data transmission method and device - Google Patents

Data transmission method and device Download PDF

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Publication number
CN107872846B
CN107872846B CN201610859917.6A CN201610859917A CN107872846B CN 107872846 B CN107872846 B CN 107872846B CN 201610859917 A CN201610859917 A CN 201610859917A CN 107872846 B CN107872846 B CN 107872846B
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bandwidth
channel
idle
20mhz
large bandwidth
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CN107872846A (en
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罗俊
张佳胤
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2017/102231 priority patent/WO2018059272A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0257—Traffic management, e.g. flow control or congestion control per individual bearer or channel the individual bearer or channel having a maximum bit rate or a bit rate guarantee
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a data transmission method and a device, wherein in the data transmission method, data transmission equipment can detect whether a large bandwidth channel in an unlicensed frequency band is idle, and the large bandwidth channel is a continuous bandwidth channel which is more than 20MHz and less than or equal to the upper limit of an available bandwidth in the unlicensed frequency band; when the large bandwidth channel is detected to be idle, data can be transmitted on the idle large bandwidth channel, so that the data transmission rate is improved.

Description

Data transmission method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
Background
With the development of the mobile internet and the intelligent terminal, the data flow presents an explosive growth trend, so that the demand for the unlicensed frequency band is more and more strong. Unlicensed bands have higher frequencies and bandwidths, which may provide higher data transmission rates and less interference. The unlicensed band includes a plurality of channels, each having a bandwidth of 20MHz, and each being an independent channel, thereby providing a wireless local area network (Wireless Local Area Networks, WLAN) with abundant channel resources, and how to provide a larger bandwidth for the plurality of independent channels to increase the data transmission rate is a challenge.
Disclosure of Invention
The application discloses a data transmission method and device, which can perform data transmission with large bandwidth and improve the data transmission rate.
The first aspect of the present application discloses a data transmission method, which includes that a data transmission device can detect whether a large bandwidth channel in an unlicensed band is idle, and when detecting that the large bandwidth channel is idle, transmit data on the idle large bandwidth channel. The large bandwidth channel is a continuous bandwidth channel which is more than 20MHz and less than or equal to the upper limit of available bandwidth in the unlicensed frequency band, the upper limit of the available bandwidth can be N times of 20MHz, N is an integer which is more than 1, and the upper limit of the available bandwidth can be determined according to the frequency band range which is released for use by each country for the unlicensed frequency band. The embodiment adopts the large bandwidth channel of the unlicensed frequency band, provides a data transmission mode with large bandwidth, and improves the data transmission rate.
In one possible design, the data transmission device may detect whether there is at least one idle 20MHz bandwidth channel in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel; if at least one idle 20MHz bandwidth channel exists, transmitting data on the at least one idle 20MHz bandwidth channel. This embodiment may utilize scattered idle channels among the non-idle large bandwidth channels to further increase the data transmission rate. The idle large bandwidth may be the same bandwidth as the non-idle large bandwidth to reduce complexity of channel detection.
In a second possible design, the data transmission device may transmit data on the at least one idle 20MHz bandwidth channel by: data transmission is performed on the at least one idle 20MHz bandwidth channel and the idle large bandwidth channel in a carrier aggregation manner.
In a third possible design, the data transmission device sets zero for subcarriers of a non-idle 20MHz bandwidth channel in the non-idle large bandwidth channel, and performs data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel after the zero setting.
In a fourth possible design, data is transmitted on an idle large bandwidth channel and a 20MHz bandwidth channel among non-idle large bandwidth channels using carrier aggregation and zeroing, where transmitting data using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole may be transmitting data on the idle large bandwidth channel and the non-idle large bandwidth channel in one fast fourier transform FFT (Fast Fourier Transformation).
In a fifth possible design, the data transmission device may detect whether a main channel of 20MHz bandwidth in the unlicensed band is idle before detecting whether a large bandwidth channel in the unlicensed band is idle; if the main channel with 20MHz bandwidth in the unlicensed frequency band is idle, detecting whether the large bandwidth channel in the unlicensed frequency band is idle, wherein the idle main channel with 20MHz bandwidth can ensure the transmission of system information.
In a sixth possible design, the data transmission device detects whether a large bandwidth channel in an unlicensed band is idle, including:
detecting whether an auxiliary channel with 20MHz bandwidth adjacent to a main channel with 20MHz bandwidth is idle;
if the auxiliary channel with 20MHz bandwidth is idle, detecting whether the 40MHz bandwidth auxiliary channel adjacent to the 20MHz bandwidth auxiliary channel is idle;
if the auxiliary channel with 40MHz bandwidth is idle, detecting whether the auxiliary channel with 80MHz bandwidth adjacent to the auxiliary channel with 40MHz bandwidth is idle; if the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 40 MHz;
if the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 160 MHz; if the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 80 MHz.
In the embodiment of the invention, before data transmission, whether the large bandwidth channel in the unlicensed frequency band is idle or not is detected, which can be called idle channel assessment for the large bandwidth channel, and the idle channel assessment adopts the sequence from small bandwidth to large bandwidth for detection, so that the detection efficiency can be improved, and the data transmission equipment can efficiently adopt the large bandwidth channel for data transmission.
In a seventh possible design, the data transmission device detects whether a large bandwidth channel in an unlicensed band is idle, including:
detecting whether a 160MHz continuous bandwidth channel is idle;
if the 160MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz main channel;
if the 160MHz continuous bandwidth channel is not idle, detecting whether the 80MHz continuous bandwidth main channel and the 80MHz continuous bandwidth auxiliary channel are idle;
if the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 80 MHz;
if the main channel with the bandwidth of 80MHz is not idle and the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 80 MHz;
if the main channel with the 80MHz bandwidth and the auxiliary channel with the 80MHz bandwidth are not idle, detecting whether the main channel with the 40MHz bandwidth and the auxiliary channel with the 40MHz bandwidth in the main channel with the 80MHz bandwidth are idle or not;
if the main channel with the bandwidth of 40MHz is idle and the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 40 MHz;
If the main channel with the 40MHz bandwidth is not idle and the auxiliary channel with the 40MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the 40MHz bandwidth.
According to the embodiment, the detection is carried out by adopting the bandwidth sequence from large to small when the idle channel is evaluated, so that the detection efficiency is improved, and the data transmission equipment can efficiently adopt a large bandwidth channel for data transmission.
In an eighth possible design, the data transmission device may determine, based on the historical interference value of the channel, whether to use 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, that is, determine whether the historical interference value is greater than a preset threshold, and if so, perform the channel detection sequence from the small bandwidth to the large bandwidth; and if the channel detection sequence is smaller than or equal to the preset threshold value, executing the channel detection sequence from the large bandwidth to the small bandwidth. In the embodiment, the historical interference value is smaller, which means that the probability of idle large bandwidth channels is higher, so that the channel detection sequence from large to small is adopted; when the historical interference value is larger, the probability of idle large bandwidth channels is smaller, so that the channel detection sequence from small to large is adopted, and the efficiency of channel detection is improved.
The second aspect of the present application also discloses a data transmission device, which may include a module for executing the data transmission method disclosed in the first aspect of the present application. The detection module is used for detecting whether a large bandwidth channel in an unlicensed frequency band is idle or not, wherein the large bandwidth channel is a continuous bandwidth channel which is more than 20MHz and less than or equal to the upper limit of an available bandwidth in the unlicensed frequency band; the transmission module is used for transmitting data on the idle large bandwidth channel when the detection module detects that the large bandwidth channel is idle.
In the 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, the data transmission device can transmit data on the idle large bandwidth channel, so that the data transmission rate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a plurality of independent channels in an unlicensed band according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a channel estimation sequence according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another channel assessment sequence disclosed in an embodiment of the present invention;
FIG. 5 is a flow chart of another data transmission method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of yet another channel estimation result disclosed in an embodiment of the present invention;
FIG. 7 is a schematic diagram of a further channel estimation result according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of yet another channel estimation result disclosed in an embodiment of the present invention;
FIG. 9 is a schematic diagram of a further channel estimation result according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;
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 understanding of the embodiments of the present invention, the following describes application scenarios of the embodiments of the present invention. Fig. 1 is a schematic diagram of a plurality of independent channels in an unlicensed band, as shown in fig. 1, where each channel is an independent channel and has a bandwidth of 20MHz, so as to provide abundant channel resources for WLAN, and a channel bonding technology is used to bond the plurality of channels into one channel for use, where the bonded channel may be referred to as a large bandwidth channel, that is, a continuous bandwidth channel with a large bandwidth channel greater than 20MHz and less than or equal to an upper limit of an available bandwidth in the unlicensed band, where the upper limit of the available bandwidth may be N times of 20MHz, where N is an integer greater than 1, and where the upper limit of the available bandwidth may be determined according to a frequency band range that is released from use in each country. In the embodiment of the present invention, the primary channel is a default or preferred transmission channel, and may also be a transmission channel containing system information, and the auxiliary channel refers to a transmission channel other than the primary channel.
The data transmission method and the device disclosed by the embodiment of the invention can adopt the large-bandwidth channel of the unlicensed frequency band to provide large-bandwidth data transmission so as to improve the data transmission rate. The following will describe in detail.
Referring to fig. 2, fig. 2 is a flow chart of a data transmission method according to an embodiment of the invention, and as shown in fig. 2, the data transmission method includes the following steps:
s201, the data transmission equipment detects whether a large bandwidth channel in an unlicensed frequency band is idle, and when the large bandwidth channel is detected to be idle, step S202 is executed; and when the large bandwidth channel is detected to be not idle, ending the flow.
S202, the data transmission device transmits data on an idle large bandwidth channel.
In the embodiment of the present invention, the terminal for executing the data transmission method may be a user device such as a mobile phone, a tablet computer, or a portable device on a user side, or may be a base station device on a base station side, which is 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 necessary to perform step S201 to detect whether the large bandwidth channel in the unlicensed band is idle, that is, perform idle channel assessment for the large bandwidth channel.
As an alternative implementation manner, referring to fig. 3, fig. 3 is a schematic diagram of a channel estimation sequence disclosed in an embodiment of the present invention, and in conjunction with fig. 3, the data transmission device detects whether a large bandwidth channel in an unlicensed band is idle, and may include the following steps:
11 The data transmission device detects whether a 20MHz auxiliary channel adjacent to a 20MHz main channel is idle;
12 If the auxiliary channel with 20MHz bandwidth is idle, the data transmission equipment detects whether the auxiliary channel with 40MHz bandwidth adjacent to the auxiliary channel with 20MHz bandwidth is idle;
alternatively, if the auxiliary channel with 20MHz bandwidth is not idle, a main channel with 20MHz bandwidth may be used for data transmission, where the main channel is used for transmitting data in a single channel transmission, which is not described in detail herein.
13 If the auxiliary channel with 40MHz bandwidth is idle, the data transmission equipment detects whether the auxiliary channel with 80MHz bandwidth adjacent to the auxiliary channel with 40MHz bandwidth is idle; if the auxiliary channel with the bandwidth of 40MHz is not idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 40 MHz;
when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 40MHz bandwidth main channel, the 40MHz bandwidth main channel is shown in fig. 3, and the data transmission device may transmit data on the 40MHz bandwidth main channel.
14 If the auxiliary channel with the bandwidth of 80MHz is idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 160 MHz; if the auxiliary channel with the bandwidth of 80MHz is not idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 80 MHz.
In the embodiment of the invention, when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz bandwidth main channel, the 160MHz bandwidth main channel is shown in fig. 3, and the data transmission device can transmit data on the 160MHz bandwidth main channel. Alternatively, when the data transmission device detects that the large bandwidth channel is idle and the idle large bandwidth channel is a primary channel with 80MHz bandwidth, the data transmission device may transmit data on the primary channel with 80MHz bandwidth as shown in fig. 3.
The embodiment can detect the large bandwidth channel in a sequence from small bandwidth to large bandwidth, improves the detection efficiency, and enables the data transmission equipment to efficiently adopt the large bandwidth channel for data transmission.
As an alternative implementation manner, referring to fig. 4, fig. 4 is a schematic diagram of another channel estimation sequence disclosed in an embodiment of the present invention, and in combination with fig. 4, the data transmission device detects whether a large bandwidth channel in an unlicensed band is idle, and may include the following steps:
21 The data transmission device detects whether a 160MHz continuous bandwidth channel is idle;
22 If the 160MHz continuous bandwidth channel is idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz main channel; if the 160MHz continuous bandwidth channel is not idle, the data transmission equipment detects whether the 80MHz continuous bandwidth main channel and the 80MHz continuous bandwidth auxiliary channel are idle;
23 If the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 80 MHz; if the main channel with the bandwidth of 80MHz is not idle and the auxiliary channel with the bandwidth of 80MHz is idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 80 MHz; if the main channel with the 80MHz bandwidth and the auxiliary channel with the 80MHz bandwidth are not idle, the data transmission equipment detects whether the main channel with the 40MHz bandwidth and the auxiliary channel with the 40MHz bandwidth in the main channel with the 80MHz bandwidth are idle or not;
24 If the main channel with the bandwidth of 40MHz is idle and the auxiliary channel with the bandwidth of 40MHz is not idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 40 MHz; if the main channel with the bandwidth of 40MHz is not idle and the auxiliary channel with the bandwidth of 40MHz is idle, the data transmission equipment detects that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 40 MHz.
Optionally, the data transmission device may also detect whether an auxiliary channel with a bandwidth of 40MHz exists in the auxiliary channels with a bandwidth of 80MHz, and if the auxiliary channel with a bandwidth of 40MHz exists, detect that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with a bandwidth of 40 MHz.
According to the embodiment, the large bandwidth channels can be detected in sequence from large bandwidth to small bandwidth, so that the detection efficiency is improved, and the data transmission equipment can efficiently adopt the large bandwidth channels for data transmission. In addition, the data transmission device detects that the idle large bandwidth channel can be a main channel with large bandwidth or an auxiliary channel with large bandwidth, for example, when the data transmission device detects that the main channel with 80MHz bandwidth is not idle and the auxiliary channel with 80MHz bandwidth is idle, the idle large bandwidth channel is the auxiliary channel with 80MHz bandwidth; when the data transmission equipment detects that the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, the idle large-bandwidth channel is the main channel with the bandwidth of 80 MHz.
As yet another alternative embodiment, the data transmission device may determine, based on the historical interference value of the channel, whether to use the above-mentioned channel detection sequence from small bandwidth to large bandwidth or the above-mentioned channel detection sequence from large bandwidth to small bandwidth, and may specifically be:
The data transmission equipment determines whether the historical interference value is larger than a preset threshold value, and if so, the step 11) is executed; if the threshold value is smaller than the preset threshold value, the step 21 is executed.
The historical interference value may be a signal-to-interference-plus-noise ratio (SINR, signal to Interference plus Noise Ratio) of the measured signal, that is, a ratio of the received useful signal power to the received interference signal power is expressed, the greater the ratio is, the better the channel environment is, the higher the transmission rate is, so that the signal-to-interference-plus-noise ratio needs to be set to be a negative value and then compared with a preset threshold value; the historical interference value may also be represented by a received power of a measurement signal (RSRP, reference Signal Received Power), which is an important indicator for measuring cell coverage, or a received signal strength indicator (RSSI, received Signal Strength Indicator); the RSSI is the average value of the total received power on the pilot frequency symbol in a measurement period within a certain measurement bandwidth, if the RSRP or the RSRP is used for measuring the magnitude of the historical interference, the RSRP or the RSRP is set to be negative, and then the RSRP or the RSRP is larger than a preset threshold value, namely the larger the historical interference value is, the smaller the historical interference value is, and the smaller the historical interference is. In addition, when the data transmission device is a user device, the user device may obtain the historical interference value from the base station side device, or obtain a comparison result between the historical interference value and a preset threshold value from the base station side device.
In the embodiment, the historical interference value is smaller, which means that the probability of idle large-bandwidth channels is higher, so that the channel detection sequence from large bandwidth to small bandwidth is adopted; the historical interference value is larger, which means that the probability of idle large bandwidth channels is smaller, so that the channel detection sequence from small bandwidth to large bandwidth is adopted, and the efficiency of channel detection is improved.
As another optional implementation manner, before the data transmission device performs step S201, it is further required to detect whether the main channel with 20MHz bandwidth in the unlicensed band is idle, and if the main channel with 20MHz bandwidth is idle, the above-mentioned idle channel assessment method may be performed.
Therefore, the embodiment of the invention can detect the idle large-bandwidth channel in the unlicensed frequency band, and transmit data on the idle large-bandwidth channel, thereby greatly improving the data transmission rate compared with the method of simply using the independent channel with 20MHz bandwidth.
Referring to fig. 5, fig. 5 is a schematic flow chart of another data transmission method disclosed in the embodiment of the present invention, where the data transmission method is different from the data transmission method in the above embodiment in that the data transmission device may further utilize at least one idle 20MHz bandwidth channel existing in a non-idle large bandwidth channel adjacent to an idle large bandwidth channel to perform data transmission, and specifically, as shown in fig. 5, the data transmission method may include the following steps:
S501, the data transmission equipment detects whether a large bandwidth channel in an unlicensed frequency band is idle, and when the large bandwidth channel is detected to be idle, step S502 is executed, otherwise, the process is ended;
s502, the data transmission equipment detects whether at least one idle 20MHz bandwidth channel exists in non-idle large bandwidth channels adjacent to the idle large bandwidth channels, when detecting that at least one idle 20MHz bandwidth channel exists, the step S503 is executed, otherwise, the process is ended;
s503, the data transmission device transmits data on the idle large bandwidth channel and on the at least one idle 20MHz bandwidth channel.
As an alternative embodiment, the data transmission device may transmit data on the above-mentioned idle large bandwidth channel and on the above-mentioned at least one idle 20MHz bandwidth channel by:
and transmitting data on the idle large-bandwidth channel and the at least one idle 20MHz bandwidth channel in a carrier aggregation mode.
As another alternative embodiment, the data transmission device may transmit data on the above-mentioned idle large bandwidth channel and on the above-mentioned at least one idle 20MHz bandwidth channel by:
Setting zero for subcarriers of the non-idle 20MHz bandwidth channels in the non-idle large bandwidth channels, and carrying out data transmission by utilizing the idle large bandwidth channels and the non-idle large bandwidth channels after zero setting.
Wherein the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole can be the transmission of data on the idle large bandwidth channel and the non-idle large bandwidth channel by a fast fourier transform FFT (Fast Fourier Transformation)
As yet another alternative embodiment, the data transmission device may transmit data on the above-mentioned idle large bandwidth channel and on the above-mentioned at least one idle 20MHz bandwidth channel by:
setting zero for the sub-carrier of a part of non-idle 20MHz bandwidth channels in the non-idle large bandwidth channels; and carrying out data transmission by utilizing the idle large bandwidth channel and the non-idle large bandwidth channel after zeroing in a carrier aggregation mode. Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole can be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by using one fast fourier transform FFT (Fast Fourier Transformation).
Fig. 6 is a schematic diagram of a channel estimation result according to an embodiment of the present invention, and taking fig. 6 as an example, a data transmission device may perform data transmission on an idle large bandwidth channel and a non-idle bandwidth channel in a zero setting or carrier aggregation manner. As shown in fig. 6, the data transmission device detects that the idle large bandwidth channel is a 40MHz bandwidth main channel, detects that a 20MHz bandwidth channel exists in the non-idle 40MHz bandwidth auxiliary channels adjacent to the 40MHz bandwidth main channel, and binds the 40MHz bandwidth main channel and the 20MHz bandwidth channel into a channel in a carrier aggregation mode to transmit data; or the sub-carriers on the non-idle 20MHz bandwidth channels in the 40MHz bandwidth auxiliary channels can be set to zero, the 40MHz bandwidth main channels and the non-idle 40MHz bandwidth auxiliary channels are bound into one channel for data transmission, and the data transmission is carried out by a Fourier transform FFT (fast Fourier transform) by utilizing the bound channels. It can be seen that the bandwidth after channel bonding in this embodiment is 60MHz, and compared with other data transmission methods, the data transmission bandwidth is increased, and the data transmission rate is improved.
For another example, referring to fig. 7, fig. 7 is a schematic diagram of a channel estimation result according to an embodiment of the present invention, and taking fig. 7 as an example, a data transmission device may perform data transmission on an idle large bandwidth channel and a non-idle bandwidth channel in a zero setting or carrier aggregation manner. As shown in fig. 7, the data transmission device detects that the idle large bandwidth channel is an auxiliary channel with 80MHz bandwidth, detects that three idle channels with 20MHz bandwidth exist in the main channel with 80MHz bandwidth, which is adjacent to the auxiliary channel with 80MHz bandwidth and is not idle, and binds the auxiliary channel with 80MHz bandwidth and the three idle channels with 20MHz bandwidth into one channel in a carrier aggregation manner, and uses the bound channels to transmit data; or the sub-carriers on the non-idle 20MHz bandwidth channels in the 80MHz bandwidth main channel can be set to zero, the 80MHz bandwidth main channel and the 80MHz bandwidth auxiliary channel are bound into one channel, and the data transmission is carried out by using the bound channels through a Fourier transform FFT. It can be seen that the bandwidth after channel bonding in this embodiment is 140MHz, which increases the data transmission bandwidth and increases the data transmission rate compared with other data transmission methods.
It should be noted that the precondition for the data transmission device to use the idle 20MHz bandwidth channel 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 the same as the non-idle large bandwidth, so that the complexity of channel detection and data transmission may be reduced.
For another example, referring to fig. 8, fig. 8 is a schematic diagram of a channel estimation result according to another embodiment of the present invention, and taking fig. 8 as an example, a data transmission device may perform data transmission on an idle large bandwidth channel and a non-idle bandwidth channel in a zero setting or carrier aggregation manner. As shown in fig. 8, the data transmission device detects that the idle large bandwidth channel is a main channel with 40MHz bandwidth, detects that an idle 20MHz bandwidth channel exists in a non-idle 40MHz bandwidth auxiliary channel with the same bandwidth adjacent to the main channel with 40MHz bandwidth, and also detects that a non-idle 80MHz bandwidth auxiliary channel exists adjacent to the auxiliary channel with 40MHz bandwidth, and the 80MHz bandwidth auxiliary channel exists an idle 20MHz bandwidth channel, so that the data transmission device can bond the idle 20MHz bandwidth channel in the main channel with 40MHz bandwidth and the idle 20MHz bandwidth channel in the auxiliary channel with 40MHz bandwidth as a channel, and does not bond the idle 20MHz bandwidth channel in the non-idle 80MHz bandwidth auxiliary channel any more, thereby avoiding increasing complexity of the system, that is, the bandwidth of data transmission is 60MHz instead of 120MHz.
For example, referring to fig. 9, fig. 9 is a schematic diagram of a channel estimation result according to another embodiment of the present invention, and taking fig. 9 as an example, a data transmission device may perform data transmission on an idle large bandwidth channel and a non-idle bandwidth channel in a zero setting manner and a carrier aggregation manner. As shown in fig. 9, the idle large bandwidth channel detected by the data transmission device is a main channel with 40MHz bandwidth, the detected non-idle large bandwidth channel is an auxiliary channel with non-adjacent 40MHz bandwidth, where multiple independent channels can be spaced between the main channel with 40MHz bandwidth and the auxiliary channel with 40MHz bandwidth in the unlicensed frequency band, or the two independent channels are respectively located in different frequency bands, and the data transmission device can set zero a subcarrier of the non-idle 20MHz bandwidth channel in the auxiliary channel with 40MHz bandwidth, and then bind the main channel with 40MHz bandwidth and the auxiliary channel with 40MHz bandwidth into one channel in a carrier aggregation manner for data transmission. It can be seen that the bandwidth after channel bonding in this embodiment is 60MHz, and compared with other data transmission methods, the data transmission bandwidth is increased, and the data transmission rate is improved.
Therefore, the data transmission method shown in fig. 5 can flexibly utilize spare scattered bandwidths 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 device according to an embodiment of the present invention, and as shown in fig. 10, the data transmission device may include: a detection module 101, a transmission module 102, wherein:
a detection module 101, configured to detect whether a large bandwidth channel in an unlicensed frequency band is idle, where the large bandwidth channel is a continuous bandwidth channel greater than 20MHz and less than or equal to an upper limit of an available bandwidth in the unlicensed frequency band;
a transmission module 102, configured to transmit data on the idle large bandwidth channel when the detection 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 is required to detect whether a large bandwidth channel in an unlicensed band is idle, and the detection process is also called a idle channel assessment method (Clear Channel Assessment, CCA). As an alternative implementation manner, the detection module 101 may perform detection from a small bandwidth to a large bandwidth, which is described in the corresponding embodiment of fig. 3, including steps 11) to 14) in the above embodiment of the invention, which will not be described in detail herein.
As an alternative embodiment, the detection module 101 detects whether the large bandwidth channel in the unlicensed band is idle, and may specifically detect the sequence from large bandwidth to small bandwidth, as described in the corresponding embodiment of fig. 4, including steps 21) to 24), which will not be described in detail herein.
As still another alternative embodiment, the data transmission apparatus may determine whether the detection module 101 uses the above-mentioned channel detection order from small bandwidth to large bandwidth or the above-mentioned channel detection order from large bandwidth to small bandwidth based on the historical interference value of the channel, so the data transmission apparatus may further include:
a first determining module 103, configured to determine whether the historical interference value is greater than a preset threshold, and if the historical interference value is greater than the preset threshold, trigger the detecting module 101 to execute the step of detecting whether the 20MHz bandwidth auxiliary channel adjacent to the 20MHz bandwidth main channel is idle, that is, a channel detection sequence from a small bandwidth to a large bandwidth;
a second determining module 104, configured to determine whether the historical interference value is less than a preset threshold; if the historical interference value is smaller than the preset threshold value, the triggering detection module 101 executes the step of detecting whether the 160MHz bandwidth channel is idle, that is, the channel detection sequence from large bandwidth to small bandwidth.
The historical interference value may be a signal-to-interference-plus-noise ratio (SINR, signal to Interference plus Noise Ratio) of the measured signal, that is, a ratio of the received useful signal power to the received interference signal power is expressed, the greater the ratio is, the better the channel environment is, the higher the transmission rate is, so that the signal-to-interference-plus-noise ratio needs to be set to be a negative value and then compared with a preset threshold value; the historical interference value may also be represented by a received power of a measurement signal (RSRP, reference Signal Received Power), which is an important indicator for measuring cell coverage, or a received signal strength indicator (RSSI, received Signal Strength Indicator); the RSSI is the average value of the total received power on the pilot frequency symbol in a measurement period within a certain measurement bandwidth, if the RSRP or the RSRP is used for measuring the magnitude of the historical interference, the RSRP or the RSRP is set to be negative, and then the RSRP or the RSRP is larger than a preset threshold value, namely the larger the historical interference value is, the smaller the historical interference value is, and the smaller the historical interference is. In addition, when the data transmission apparatus is a user equipment, the user equipment may obtain the historical interference value from the base station side equipment, or obtain a comparison result between the historical interference value and a preset threshold value from the base station side equipment. According to the embodiment, when the historical interference is smaller, the probability of idle of a large bandwidth channel is higher, so that an idle channel assessment method from large to small is adopted; when the historical interference is larger, the probability of indicating that the large bandwidth channel is idle is smaller, so that a small-to-large idle channel assessment method is adopted, and the efficiency of channel assessment is improved.
As an alternative embodiment, the detection module 101 in the data transmission apparatus needs to detect whether the main channel with 20MHz bandwidth in the unlicensed band is idle before detecting whether the main channel with 20MHz bandwidth in the unlicensed band is idle, and if the main channel with 20MHz bandwidth is idle, the above-mentioned idle channel assessment method may be executed.
Therefore, the embodiment of the invention can detect the idle large-bandwidth channel in the unlicensed frequency band, and transmit data on the idle large-bandwidth channel, thereby greatly improving the data transmission rate compared with the method of simply using the independent channel with 20MHz bandwidth.
As an alternative embodiment, in the data transmission device, the transmission module may not only use idle large bandwidth to transmit data, but also use at least one idle 20MHz bandwidth channel existing in the non-idle large bandwidth channels to transmit data. The idle large bandwidth channel can be adjacent to the non-idle large bandwidth channel, and the idle large bandwidth channel and the non-idle large bandwidth channel can be the same-size bandwidth, so that the complexity of idle channel evaluation detection is reduced.
The detection module 101 detects whether a large bandwidth channel in the unlicensed band is idle, and detects whether at least one idle 20MHz bandwidth channel exists in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel, and accordingly, the transmission module 102 may transmit data on the idle large bandwidth channel and on the at least one idle 20MHz bandwidth channel.
As an alternative embodiment, the transmission module 102 may transmit data on an idle large bandwidth channel and at least one idle 20MHz bandwidth channel by:
and transmitting data on the idle large-bandwidth channel and the at least one idle 20MHz bandwidth channel in a carrier aggregation mode.
As another alternative embodiment, the transmitting module 102 may transmit data on the idle large bandwidth channel and on the at least one idle 20MHz bandwidth channel by:
setting zero for subcarriers of the non-idle 20MHz bandwidth channels in the non-idle large bandwidth channels, and carrying out data transmission by utilizing the idle large bandwidth channels and the non-idle large bandwidth channels after zero setting. Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole can be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by using one fast fourier transform FFT (Fast Fourier Transformation).
As shown in fig. 6, when the detection module 101 detects that the idle large bandwidth channel is a main channel with 40MHz bandwidth, and detects that a 20MHz bandwidth channel exists in a non-idle 40MHz bandwidth auxiliary channel with the same bandwidth adjacent to the main channel with 40MHz bandwidth, the transmission module 102 may bind the main channel with 40MHz bandwidth and the 20MHz bandwidth channel into a channel in a carrier aggregation manner, and transmit data by using the bound channel; or the transmission module 102 may set zero for a subcarrier on a non-idle 20MHz bandwidth channel in the 40MHz bandwidth auxiliary channel, bind a 40MHz bandwidth main channel and the non-idle 40MHz bandwidth auxiliary channel into a channel for data transmission, and use a fast fourier transform FFT for data transmission by using the bound channel. It can be seen that the bandwidth after channel bonding in this embodiment is 60MHz, which increases the data transmission bandwidth and increases the data transmission rate compared with other data transmission devices.
For another example, as shown in fig. 7, when the detection module 101 detects that the idle large bandwidth channel is an auxiliary channel with 80MHz bandwidth, and detects that three idle channels with 20MHz bandwidth exist in the non-idle main channel with 80MHz bandwidth, which is adjacent to the auxiliary channel with 80MHz bandwidth, the transmission module 102 binds the auxiliary channel with 80MHz bandwidth and the three idle channels with 20MHz bandwidth into one channel in a carrier aggregation manner, and uses the bound channels to transmit data; or the transmission module 102 may set zero for a subcarrier on a non-idle 20MHz bandwidth channel in the 80MHz bandwidth main channel, bind the 80MHz bandwidth main channel and the 80MHz bandwidth auxiliary channel into a channel, and perform data transmission by using the bound channel through a fourier transform FFT. It can be seen that the bandwidth after channel bonding in this embodiment is 140MHz, which increases the data transmission bandwidth and increases the data transmission rate compared with other data transmission devices.
It should be noted that the precondition of the data transmission device using the idle 20MHz bandwidth channel 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 the same as the non-idle large bandwidth, so that the complexity of channel detection and data transmission may be reduced.
For example, as shown in fig. 8, the detection module 101 detects that the idle large bandwidth channel is a main channel with 40MHz bandwidth, detects that an idle 20MHz bandwidth channel exists in a non-idle 40MHz bandwidth auxiliary channel with the same bandwidth adjacent to the main channel with 40MHz bandwidth, and also detects that a non-idle 80MHz bandwidth auxiliary channel exists adjacent to the auxiliary channel with 40MHz bandwidth, and if the idle 20MHz bandwidth channel exists in the auxiliary channel with 80MHz bandwidth, the data transmission device can bind the idle 20MHz bandwidth channel in the main channel with 40MHz bandwidth and the idle 20MHz bandwidth channel in the auxiliary channel with 40MHz bandwidth as a channel, and does not bind the idle 20MHz bandwidth channel in the auxiliary channel with non-idle 80MHz bandwidth any more, so that the complexity of channel detection or data transmission is avoided from increasing, that is, the bandwidth of data transmission is 60MHz instead of 120MHz.
As yet another alternative embodiment, the transmitting module 102 may transmit data on the idle large bandwidth channel and on the at least one idle 20MHz bandwidth channel by:
setting zero for the sub-carrier of a part of non-idle 20MHz bandwidth channels in the non-idle large bandwidth channels; and carrying out data transmission by utilizing the idle large bandwidth channel and the non-idle large bandwidth channel after zeroing in a carrier aggregation mode.
For example, as shown in fig. 9, the idle large bandwidth channel detected by the data transmission device is a main channel with 40MHz bandwidth, the detected non-idle large bandwidth channel is an auxiliary channel with non-adjacent 40MHz bandwidth, where multiple independent channels may be spaced between the main channel with 40MHz bandwidth and the auxiliary channel with 40MHz bandwidth in the unlicensed frequency band, or the two independent channels are respectively located in different frequency bands, for example, respectively located in the 5Ghz frequency band and the 70Ghz frequency band, and the data transmission device may bind the sub-carrier of the sub-channel with non-idle 20MHz bandwidth in the auxiliary channel with 40MHz bandwidth into one channel for data transmission in a carrier aggregation manner after zeroing the sub-carrier of the main channel with 40MHz bandwidth. It can be seen that the bandwidth after channel bonding in this embodiment is 60MHz, and compared with other data transmission methods, the data transmission bandwidth is increased, and the data transmission rate is improved.
Therefore, the data transmission device shown in fig. 10 can flexibly utilize spare scattered bandwidths 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, and as shown in fig. 11, the data transmission device may include, but is not limited to: the device comprises a memory 111, a communication interface 112 and a processor 113, wherein the communication interface 112 is used for transmitting data, and the memory 111 is used for storing historical interference values detected by the processor 113 or receiving historical interference values sent by other data transmission devices.
The communication interface 112 may be a wired communication interface, such as an ethernet interface, a wireless communication interface, or a combination thereof. The ethernet interface may be an optical interface, an electrical interface, or a combination thereof. The wireless communication interface may be a WLAN interface, a cellular network communication interface, a combination thereof, or the like. The memory 111 may include a volatile memory (english) such as a random-access memory (RAM); the memory may also include a nonvolatile memory (english: non-volatile memory), such as a flash memory (english: flash memory), a hard disk (english: hard disk drive, abbreviated as HDD) or a solid state disk (english: solid-state drive, abbreviated as SSD); the memory 111 may also comprise a combination of the above types of memories. The processor 113 may be a central processor (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of CPU and 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 (PLD), or a combination thereof (English: programmable logic device). The PLD may be a complex programmable logic device (English: complex programmable logic device, abbreviated: CPLD), a field programmable gate array (English: field-programmable gate array, abbreviated: FPGA), a general-purpose array logic (English: generic array logic, abbreviated: 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 an unlicensed band is idle, where the large bandwidth channel is a continuous bandwidth channel greater than 20MHz and less than or equal to an upper limit of an available bandwidth in the unlicensed band; when the processor 113 detects that the large bandwidth channel is idle, data may 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 needs to detect whether a large bandwidth channel in an unlicensed band is idle, and this detection process is also called a clear channel assessment method (Clear Channel Assessment, CCA). As an alternative embodiment, the processor 113 may perform the detection from small bandwidth to large bandwidth in order, as described in the corresponding example of fig. 3, and perform the following steps:
detecting whether an auxiliary channel with 20MHz bandwidth adjacent to a main channel with 20MHz bandwidth is idle;
if the auxiliary channel with 20MHz bandwidth is idle, detecting whether the 40MHz bandwidth auxiliary channel adjacent to the 20MHz bandwidth auxiliary channel is idle;
if the auxiliary channel with 40MHz bandwidth is idle, detecting whether the auxiliary channel with 80MHz bandwidth adjacent to the auxiliary channel with 40MHz bandwidth is idle; if the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 40 MHz;
If the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 160 MHz; if the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 80 MHz.
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 a 160MHz bandwidth main channel, the 160MHz bandwidth main channel is shown in fig. 3, and the data transmission device may transmit data on the 160MHz bandwidth main channel. Alternatively, when the processor 113 detects that the large bandwidth channel is idle and the idle large bandwidth channel is a primary channel of 80MHz bandwidth, the primary channel of 80MHz bandwidth is as shown in fig. 3, the processor 113 may transmit data on the primary channel of 80MHz bandwidth.
The embodiment can detect the large bandwidth channel in a sequence from small bandwidth to large bandwidth, improves the detection efficiency, and enables the data transmission equipment to efficiently adopt the large bandwidth channel for data transmission.
As an alternative embodiment, the processor 113 detects whether the large bandwidth channel in the unlicensed band is idle, and may specifically detect the sequence from large bandwidth to small bandwidth, as described in the corresponding embodiment of fig. 4, including the following steps:
Detecting whether a 160MHz continuous bandwidth channel is idle;
if the 160MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz main channel;
if the 160MHz continuous bandwidth channel is not idle, detecting whether the 80MHz continuous bandwidth main channel and the 80MHz continuous bandwidth auxiliary channel are idle;
if the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 80 MHz;
if the main channel with the bandwidth of 80MHz is not idle and the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 80 MHz;
if the main channel with the 80MHz bandwidth and the auxiliary channel with the 80MHz bandwidth are not idle, detecting whether the main channel with the 40MHz bandwidth and the auxiliary channel with the 40MHz bandwidth in the main channel with the 80MHz bandwidth are idle or not;
if the main channel with the bandwidth of 40MHz is idle and the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 40 MHz;
If the main channel with the 40MHz bandwidth is not idle and the auxiliary channel with the 40MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the 40MHz bandwidth.
Alternatively, the processor 113 may also detect whether an auxiliary channel with a bandwidth of 40MHz exists in the auxiliary channels with a bandwidth of 80MHz, and if an auxiliary channel with a bandwidth of 40MHz exists, it detects that the large bandwidth channel is idle and the idle large bandwidth channel is an auxiliary channel with a bandwidth of 40 MHz.
According to the embodiment, the large bandwidth channels can be detected in sequence from large bandwidth to small bandwidth, so that the detection efficiency is improved, and the data transmission equipment can efficiently adopt the large bandwidth channels for data transmission. In addition, the idle large bandwidth channel detected by the data transmission device may be a main channel with a large bandwidth, or may be an auxiliary channel with a large bandwidth, for example, when the data transmission device detects that the main channel with a bandwidth of 80MHz is not idle and the auxiliary channel with a bandwidth of 80MHz is idle, the idle large bandwidth channel is the auxiliary channel with a bandwidth of 80 MHz; when the data transmission equipment detects that the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, the idle large-bandwidth channel is the main channel with the bandwidth of 80 MHz.
In the embodiment of the present invention, before the processor 113 detects whether the large bandwidth channel in the unlicensed band is idle, the following steps may be further executed:
detecting whether a main channel with 20MHz bandwidth in the unlicensed frequency band is idle;
and if the main channel with the 20MHz bandwidth in the unlicensed frequency band is idle, executing the step of detecting whether the large bandwidth channel in the unlicensed frequency band is idle.
As yet another alternative embodiment, the processor 113 may determine whether to use the above idle channel assessment method from small bandwidth to large bandwidth or the above idle channel assessment method from large bandwidth to small bandwidth based on the historical interference value of the channel, and may include the steps of:
determining whether the historical interference value is greater than a preset threshold value;
if the historical interference value is greater than the preset threshold value, the step of detecting whether the 20MHz auxiliary channel adjacent to the 20MHz main channel is idle or not is executed, namely, the channel detection sequence from small bandwidth to large bandwidth.
And if the historical interference value is smaller than or equal to the preset threshold value, executing the step of detecting whether the 160MHz bandwidth channel is idle, namely, the channel detection sequence from large bandwidth to small bandwidth.
Optionally, the data transmission device may further perform data transmission using at least one idle 20MHz bandwidth channel existing in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel, and specifically, the processor 113 may perform the following steps:
Detecting whether at least one idle 20MHz bandwidth channel exists in non-idle large bandwidth channels adjacent to the idle large bandwidth channels;
if at least one idle 20MHz bandwidth channel exists, transmitting data on the at least one idle 20MHz bandwidth channel.
Wherein 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 alternative embodiment, the processor 113 may transmit data on the at least one idle 20MHz bandwidth channel, in particular, on the at least one idle 20MHz bandwidth channel and the idle large bandwidth channel in a carrier aggregation manner.
As another alternative embodiment, the processor 113 may transmit data using the at least one idle 20MHz bandwidth channel in the determined non-idle large bandwidth channel, specifically, zero the subcarrier of the non-idle 20MHz bandwidth channel in the non-idle large bandwidth channel, and transmit data using the idle large bandwidth channel and the zero-set non-idle large bandwidth channel as a whole. Wherein, the data transmission by using the idle large bandwidth channel and the non-idle large bandwidth channel as a whole can be to transmit data on the idle large bandwidth channel and the non-idle large bandwidth channel by using one fast fourier transform FFT (Fast Fourier Transformation). Reference may be made specifically to the corresponding descriptions in fig. 6 to 8 in the above embodiments, and detailed descriptions of the embodiments of the present invention will be omitted.
As yet another alternative embodiment, the processor 113 may transmit data on the idle large bandwidth channel and on the at least one idle 20MHz bandwidth channel by:
setting zero for the sub-carrier of a part of non-idle 20MHz bandwidth channels in the non-idle large bandwidth channels; and carrying out data transmission by utilizing the idle large bandwidth channel and the non-idle large bandwidth channel after zeroing in a carrier aggregation mode. Reference may be made specifically to the corresponding description of fig. 9 in the above embodiment, and embodiments of the present invention will not be described in detail.
Further, the data transmission device shown in fig. 11 can flexibly use spare scattered bandwidths in the large bandwidth, further increase the data transmission bandwidth, and increase the data transmission rate.
The foregoing describes in detail a data transmission method and apparatus disclosed in the embodiments of the present invention, and specific examples are applied to illustrate the principles and embodiments of the present invention, where the foregoing examples are only used to help understand the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (14)

1. A data transmission method, comprising:
determining whether the historical interference value is greater than a preset threshold value;
if the historical interference value is greater than a preset threshold value, based on the bandwidth sequence from small to large of idle channel evaluation, detecting whether a large bandwidth channel in an unlicensed frequency band is idle or not and detecting whether a non-idle large bandwidth channel adjacent to the idle large bandwidth channel has at least one idle 20MHz bandwidth channel or not;
if the historical interference value is smaller than or equal to a preset threshold value, based on the bandwidth sequence from large to small of idle channel evaluation, detecting whether a large bandwidth channel in an unlicensed frequency band is idle or not and detecting whether at least one idle 20MHz bandwidth channel exists in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel or not;
the large bandwidth channel is a continuous bandwidth channel which is more than 20MHz and less than or equal to the upper limit of the available bandwidth in the unlicensed frequency band;
transmitting data on the idle large bandwidth channel when the large bandwidth channel is detected to be idle, and
if at least one idle 20MHz bandwidth channel exists, transmitting data on the at least one idle 20MHz bandwidth channel.
2. The method of claim 1, wherein the idle large bandwidth channel is the same bandwidth as the non-idle large bandwidth channel.
3. The method according to claim 1 or 2, wherein said transmitting data on said at least one idle 20MHz bandwidth channel comprises:
data transmission is performed on the at least one idle 20MHz bandwidth channel and the idle large bandwidth channel in a carrier aggregation manner.
4. The method according to claim 1 or 2, wherein said transmitting data on an idle large bandwidth channel and said transmitting data on said at least one idle 20MHz bandwidth channel comprises:
setting zero for subcarriers of a non-idle 20MHz bandwidth channel in the non-idle large bandwidth channels, and carrying out data transmission by utilizing the idle large bandwidth channels and the non-idle large bandwidth channels after zero setting.
5. The method according to claim 1 or 2, characterized in that the method further comprises:
detecting whether a main channel with 20MHz bandwidth in the unlicensed frequency band is idle;
and if the main channel with the 20MHz bandwidth in the unlicensed frequency band is idle, executing the step of determining whether the historical interference value is larger than a preset threshold value.
6. The method according to claim 1 or 2, wherein the detecting whether a large bandwidth channel in an unlicensed band is free based on a bandwidth order of clear channel assessment, comprises:
detecting whether an auxiliary channel with 20MHz bandwidth adjacent to a main channel with 20MHz bandwidth is idle;
if the auxiliary channel with 20MHz bandwidth is idle, detecting whether the 40MHz bandwidth auxiliary channel adjacent to the 20MHz bandwidth auxiliary channel is idle;
if the auxiliary channel with 40MHz bandwidth is idle, detecting whether the auxiliary channel with 80MHz bandwidth adjacent to the auxiliary channel with 40MHz bandwidth is idle; if the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 40 MHz;
if the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 160 MHz; if the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 80 MHz.
7. The method according to claim 1 or 2, wherein the detecting whether the large bandwidth channel in the unlicensed band is free based on the order of the bandwidths from large to small based on the clear channel assessment comprises:
Detecting whether a 160MHz continuous bandwidth channel is idle;
if the 160MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz main channel;
if the 160MHz continuous bandwidth channel is not idle, detecting whether the 80MHz continuous bandwidth main channel and the 80MHz continuous bandwidth auxiliary channel are idle;
if the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 80 MHz;
if the main channel with the bandwidth of 80MHz is not idle and the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 80 MHz;
if the main channel with the 80MHz bandwidth and the auxiliary channel with the 80MHz bandwidth are not idle, detecting whether the main channel with the 40MHz bandwidth and the auxiliary channel with the 40MHz bandwidth in the main channel with the 80MHz bandwidth are idle or not;
if the main channel with the bandwidth of 40MHz is idle and the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 40 MHz;
If the main channel with the 40MHz bandwidth is not idle and the auxiliary channel with the 40MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the 40MHz bandwidth.
8. A data transmission apparatus, comprising:
the first determining module is used for determining whether the historical interference value is larger than a preset threshold value, and if the historical interference value is larger than the preset threshold value, the triggering detecting module is used for executing the detecting operation based on the bandwidth sequence from small to large of idle channel evaluation;
the second determining module is used for determining whether the historical interference value is smaller than or equal to a preset threshold value, and if the historical interference value is smaller than or equal to the preset threshold value, the triggering detecting module is used for executing the detection operation based on the bandwidth sequence from large to small of the idle channel evaluation;
the detection module is used for detecting whether a large bandwidth channel in an unlicensed frequency band is idle or not and detecting whether at least one idle 20MHz bandwidth channel exists in a non-idle large bandwidth channel adjacent to the idle large bandwidth channel or not;
the large bandwidth channel is a continuous bandwidth channel which is more than 20MHz and less than or equal to the upper limit of the available bandwidth in the unlicensed frequency band;
the transmission module is used for transmitting data on the idle large bandwidth channel when the detection module detects that the large bandwidth channel is idle;
The transmission module is configured to transmit data on at least one idle 20MHz bandwidth channel when there is at least one idle 20MHz bandwidth channel in the non-idle large bandwidth channels.
9. The apparatus of claim 8, wherein the idle large bandwidth channel is the same bandwidth as the non-idle large bandwidth channel.
10. The apparatus according to claim 8 or 9, wherein the transmission module transmits data on the at least one idle 20MHz bandwidth channel, in particular in a carrier aggregation manner, and on the at least one idle 20MHz bandwidth channel and the idle large bandwidth channel.
11. The apparatus according to claim 8 or 9, wherein the transmission module uses the at least one idle 20MHz bandwidth channel of the non-idle large bandwidth channels to transmit data, specifically, sets subcarriers of the non-idle 20MHz bandwidth channels of the non-idle large bandwidth channels to zero, and uses the idle large bandwidth channels and the non-idle large bandwidth channels after the zero setting to transmit data as a whole.
12. The apparatus according to claim 8 or 9, wherein the detection module is further configured to detect whether a main channel of a 20MHz bandwidth in the unlicensed band is idle; and if the main channel with the 20MHz bandwidth in the unlicensed frequency band is idle, executing the first determining module for determining whether the historical interference value is larger than a preset threshold value.
13. The apparatus according to claim 8 or 9, wherein the detection module detects whether a large bandwidth channel in an unlicensed band is free based on a bandwidth order from small to large of the clear channel assessment, in particular:
detecting whether an auxiliary channel with 20MHz bandwidth adjacent to a main channel with 20MHz bandwidth is idle;
if the auxiliary channel with 20MHz bandwidth is idle, detecting whether the 40MHz bandwidth auxiliary channel adjacent to the 20MHz bandwidth auxiliary channel is idle;
if the auxiliary channel with 40MHz bandwidth is idle, detecting whether the auxiliary channel with 80MHz bandwidth adjacent to the auxiliary channel with 40MHz bandwidth is idle; if the auxiliary channel with the 40MHz bandwidth is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the 40MHz bandwidth;
if the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a main channel with the bandwidth of 160 MHz; if the auxiliary channel with the bandwidth of 80MHz is not idle, the idle large-bandwidth channel is detected to be the main channel with the bandwidth of 80 MHz.
14. The apparatus according to claim 8 or 9, wherein the detection module detects whether a large bandwidth channel in an unlicensed band is free based on a bandwidth order from large to small of a clear channel assessment, in particular:
Detecting whether a 160MHz continuous bandwidth channel is idle;
if the 160MHz continuous bandwidth channel is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is a 160MHz main channel;
if the 160MHz continuous bandwidth channel is not idle, detecting whether the 80MHz continuous bandwidth main channel and the 80MHz continuous bandwidth auxiliary channel are idle;
if the main channel with the bandwidth of 80MHz is idle and the auxiliary channel with the bandwidth of 80MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 80 MHz;
if the main channel with the bandwidth of 80MHz is not idle and the auxiliary channel with the bandwidth of 80MHz is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the bandwidth of 80 MHz;
if the main channel with the 80MHz bandwidth and the auxiliary channel with the 80MHz bandwidth are not idle, detecting whether the main channel with the 40MHz bandwidth and the auxiliary channel with the 40MHz bandwidth in the main channel with the 80MHz bandwidth are idle or not;
if the main channel with the bandwidth of 40MHz is idle and the auxiliary channel with the bandwidth of 40MHz is not idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the main channel with the bandwidth of 40 MHz;
if the main channel with the 40MHz bandwidth is not idle and the auxiliary channel with the 40MHz bandwidth is idle, detecting that the large bandwidth channel is idle and the idle large bandwidth channel is the auxiliary channel with the 40MHz bandwidth.
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