CN112188550B - Data transmission method, wireless access point and computer readable storage medium - Google Patents
Data transmission method, wireless access point and computer readable storage medium Download PDFInfo
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- CN112188550B CN112188550B CN202011043290.XA CN202011043290A CN112188550B CN 112188550 B CN112188550 B CN 112188550B CN 202011043290 A CN202011043290 A CN 202011043290A CN 112188550 B CN112188550 B CN 112188550B
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- 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
- H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
- H04W28/0221—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices power availability or consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
- H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
Abstract
A data transmission method, a wireless access point and a computer readable storage medium. The method comprises the following steps: when a data frame to be transmitted exists, detecting the power of a current transmitting channel and the power of an adjacent channel; judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of an adjacent channel; and when the virtual carrier needs to be added on the current transmitting channel, adding the virtual carrier on the current transmitting channel, and transmitting the data frame to be transmitted on the current transmitting channel after the virtual carrier is added. By applying the scheme, the frequency spectrum efficiency can be improved while adjacent channel interference is better inhibited.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a wireless access point, and a computer-readable storage medium.
Background
In a wifi system, a wireless Access Point (AP) sends data to a User Equipment (UE) and a Station (Station). Because of the close proximity between adjacent channels in wifi systems, adjacent channel interference is particularly severe.
To combat the adjacent channel interference, virtual carriers are usually disposed at the left and right ends of the transmission channel, and no data is transmitted on the virtual carriers, thereby forming a guard interval. At the receiving end, an analog filter and a digital filter are usually used to suppress the adjacent channel interference.
However, with the above scheme, when the interference of the adjacent channel is large, the information carrier is still interfered.
Disclosure of Invention
The invention aims to solve the problems that: the frequency spectrum efficiency is improved while the adjacent channel interference is better suppressed.
In order to solve the above problem, an embodiment of the present invention provides a data sending method, where the method includes:
when a data frame to be transmitted exists, detecting the power of a current transmitting channel and the power of an adjacent channel;
judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of an adjacent channel;
and when the virtual carrier needs to be added on the current transmitting channel, adding the virtual carrier on the current transmitting channel, and transmitting the data frame to be transmitted on the current transmitting channel after the virtual carrier is added.
Optionally, the determining whether to add a virtual carrier to the current transmission channel based on the power of the current transmission channel and the power of an adjacent channel includes:
calculating the ratio of the power of the current transmitting channel to the power of the adjacent channel;
and when the ratio of the power of the current transmitting channel to the power of the adjacent channel is less than or equal to a preset ratio threshold, judging that the virtual carrier needs to be added, otherwise, not adding the virtual carrier.
Optionally, when a virtual carrier needs to be added to the current transmission channel, adding the virtual carrier to the current transmission channel includes:
when virtual carrier needs to be added, virtual carrier adjustment indication information is generated; the virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added;
and adding the virtual carrier on the current transmitting channel based on the virtual carrier adjustment indication information.
Optionally, the number of virtual carriers to be added is related to a bandwidth and a fading value of a transition band of a filter at a receiving end of the data frame to be transmitted.
Optionally, the position of the virtual carrier to be added is located at a carrier position that will be interfered in the current transmission channel.
Optionally, the frame header of the data frame to be sent includes the virtual carrier adjustment indication information.
Optionally, the method further comprises: and when the virtual carrier does not need to be added on the current transmitting channel, transmitting the data frame to be transmitted on the current transmitting channel.
An embodiment of the present invention further provides a wireless access point, where the wireless access point includes:
the device comprises a power detection unit, a channel selection unit and a channel selection unit, wherein the power detection unit is suitable for detecting the power of a current transmission channel and the power of an adjacent channel when a data frame to be transmitted exists;
the judging unit is suitable for judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of an adjacent channel;
a virtual carrier mapping unit, adapted to add a virtual carrier on the current transmission channel when the virtual carrier needs to be added on the current transmission channel;
and the data sending unit is suitable for transmitting the data frame to be sent on the current transmitting channel after the virtual carrier is added.
Optionally, the determining unit includes:
the first calculating subunit is suitable for calculating the ratio of the power of the current transmitting channel to the power of an adjacent channel;
and the judging subunit is suitable for judging that the virtual carrier needs to be added when the ratio of the power of the current transmitting channel to the power of the adjacent channel is less than or equal to a preset ratio threshold, otherwise, the virtual carrier does not need to be added.
Optionally, the virtual carrier mapping unit is adapted to generate virtual carrier adjustment indication information when a virtual carrier needs to be added; the virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added; and adding a virtual carrier on the current transmitting channel based on the virtual carrier adjustment indication information.
Optionally, the number of virtual carriers to be added is related to a bandwidth and a fading value of a transition band of a filter at a receiving end of the data frame to be transmitted.
Optionally, the position of the virtual carrier to be added is located at a carrier position that will be interfered in the current transmission channel.
Optionally, the wireless access point further includes: and the indication information mapping unit is suitable for adding the virtual carrier adjustment indication information in the frame header of the data frame to be sent.
Optionally, the data sending unit is adapted to transmit the data frame to be sent on the current transmission channel when it is not necessary to add a virtual carrier on the current transmission channel.
An embodiment of the present invention further provides another wireless access point, which includes a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of any one of the methods when running the computer program.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of any one of the methods described above.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
by adopting the scheme, whether the virtual carrier needs to be added on the current transmitting channel is judged based on the power of the current transmitting channel and the power of the adjacent channel, and when the virtual carrier needs to be added on the current transmitting channel, the virtual carrier is added. By adding the virtual carrier, the interference of the adjacent channel can be inhibited. And whether to add the virtual carrier is judged by the power of the current transmitting channel and the power of the adjacent channel, and the frequency spectrum efficiency can be effectively improved compared with the method of directly adding the virtual carrier.
Drawings
FIG. 1 is a schematic diagram of the location of a plurality of channels at a frequency of 5 GHz;
fig. 2 is a schematic diagram of an arrangement of virtual carriers;
fig. 3 is a schematic diagram of the interference after the virtual carrier is set;
fig. 4 is a flowchart of a data transmission method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wireless access point according to an embodiment of the present invention.
Detailed Description
In wifi systems, adjacent channels are in close proximity, especially at 5GHz frequencies. As shown in fig. 1, 8 5GHz channels are adjacent in sequence from low to high in frequency. Each channel has a bandwidth of 20MHz. f. of 20_1 To f 20_8 Is the central frequency point of the corresponding channel. Wherein the central frequency point is f 20_2 With a central frequency point of f 20_1 Is closely adjacent to the channel with the center frequency point of f 20_1 The channel and the central frequency point of (f) 20_3 Of the channel (c).
Since there is no frequency interval or the interval between adjacent channels is small, the adjacent channel interference may be serious, thereby affecting the communication performance.
To combat adjacent channel interference, virtual carriers are typically placed at both ends of the channel, and no energy is transmitted on the virtual carriers, thereby forming a guard interval.
In the wifi 802.11ax protocol, the left low frequency portion and the right high frequency portion of the channel each have a virtual carrier of about 400 KHz. With the central frequency point in FIG. 1 as f 20_2 The channel and the center frequency point of f 20_1 For example, the center frequency point is f 20_1 The left side of the channel is provided with a virtual carrier wave of 400KHz, and the central frequency point is f 20_2 The right side of the channel has a 400KHz virtual carrier. The central frequency point is f 20_1 The virtual carrier and the central frequency point on the right side of the channel are f 20_2 The virtual carriers to the left of the channel, which form a guard interval of about 800 KHz.
When the central frequency point is f 20_2 The channel and the center frequency point of (f) 20_1 When the channels of (2) are simultaneously communicated, an analog filter and a digital filter are generally used at the receiving end to suppress interference of adjacent channels.
The inventor researches and discovers that when a filter and a digital filter a received signal after the center frequency of the received signal is shifted to 0HZ, the bandwidth of the transition band usually exceeds the guard interval between adjacent channels due to the existence of the transition band with a certain frequency range between the pass band and the stop band of the filter, and therefore, the transition band of the filter introduces a large interference, such as the triangular part of the graph (a) in fig. 3, and the interference introduced by the transition band is adjacent to the current transmission channel.
In demodulation, it is usually one time sampling. According to the sampling theorem, after down-sampling, the out-of-band interference is superimposed on the left signal, such as the triangular part of the graph (b) in fig. 3, and a carrier with a width of Δ f is interfered. The superposition interference cannot be eliminated, and can seriously affect the demodulation of the modulated information, especially when the code rate is high, if the redundancy is not enough to correct the error, the loss of the whole frame can be caused. Alternatively, the loss of the entire frame may also occur if there is no Signal Noise Ratio (SNR) sufficient for the Modulation and Coding Scheme (MCS) used for the frame.
That is, the existing scheme adopts the virtual carriers to reduce the interference, but the number and the position of the virtual carriers in the protocol are fixed, but when there is interference of a larger adjacent channel, the information carrier is still interfered.
In order to solve the above problem, an embodiment of the present invention provides a data transmission method, which determines whether to add a virtual carrier to a current transmission channel based on power of the current transmission channel and power of an adjacent channel, and adds the virtual carrier when the virtual carrier needs to be added to the current transmission channel. By adding the virtual carrier, the interference of the adjacent channel can be better inhibited. And whether to add the virtual carrier is judged by the power of the current transmitting channel and the power of the adjacent channel, and the frequency spectrum efficiency can be effectively improved compared with the method of directly adding the virtual carrier.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 4, an embodiment of the present invention provides a data transmission method, which is applicable to an AP. The AP serves as a bridge between the wireless network and the wired network, and may send data to the UE or the station, but no matter what the receiving end is, the data sending method in the embodiment of the present invention may be used to send data.
Specifically, the method comprises the following steps:
and step 41, when the data frame to be transmitted exists, detecting the power of the current transmitting channel and the power of the adjacent channel.
In a specific implementation, for each data frame to be transmitted, before transmission, the power Ps of the current transmission channel and the power Pi of the adjacent channel may be detected. And when the current transmission channel is the first or last transmission channel under the current frequency, the number of the adjacent channels is only one. When the current transmission channel is a middle channel (i.e., not the first or last transmission channel) at the current frequency, the number of adjacent channels is two.
Whether or not to add the virtual carrier between the current transmission channel and each adjacent channel and how to add the virtual carrier can be implemented by adopting the scheme of the invention.
In an implementation, the power Ps of the current transmission channel and the power Pi of the adjacent channel may be detected by various methods, which are not limited herein.
And 42, judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of the adjacent channel.
In the specific implementation, based on the power Ps of the current transmission channel and the power Pi of the adjacent channel, various methods may be adopted to determine whether to add a virtual carrier to the current transmission channel, which is not limited herein.
In an embodiment of the present invention, a ratio between the power Ps of the current transmission channel and the power Pi of the adjacent channel may be calculated first, and then the ratio is compared with a preset ratio threshold Tr. Wherein the preset ratio threshold Tr can be obtained through a limited number of experiments.
When the ratio of the power Ps of the current transmission channel to the power Pi of the adjacent channel is less than or equal to a preset ratio threshold Tr, that is, (Ps/Pi) is less than or equal to Tr, it indicates that the power Pi of the adjacent channel is larger and the interference of the adjacent channel is also larger, and at this time, it can be determined that a virtual carrier needs to be added to suppress the interference of the adjacent channel.
When the ratio of the power Ps of the current transmitting channel to the power Pi of the adjacent channel is greater than a preset ratio threshold Tr, namely (Ps/Pi) > Tr, the power Pi of the adjacent channel is smaller, the interference of the adjacent channel is smaller, and at this time, the virtual carrier does not need to be added.
When the virtual carrier needs to be added, step 43 is executed, otherwise step 44 is executed.
And 43, adding a virtual carrier on the current transmitting channel, and transmitting the data frame to be transmitted on the current transmitting channel after the virtual carrier is added.
In a specific implementation, a plurality of methods may be adopted, and a virtual carrier is added to the current transmission channel, which is not limited specifically.
In an embodiment of the present invention, when a virtual carrier needs to be added, virtual carrier adjustment indication information may be generated first, and then a virtual carrier is added to the current transmission channel based on the virtual carrier adjustment indication information. The virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added.
In a specific implementation, the number of virtual carriers to be added is related to a bandwidth and a fading value of a filter transition band at a receiving end of the data frame to be transmitted. By obtaining the bandwidth and the fading value, the transition band of the filter can be determined. Based on the characteristics of the transition band of the receiving end filter, the number of virtual carriers to be added can be determined, so that the guard interval between adjacent channels is close to or even larger than the bandwidth of the transition band of the receiving end filter.
In specific implementation, the bandwidths of the virtual carriers may be different in different transmission modes of the AP, and one virtual carrier may be added or two or more virtual carriers may be added based on the bandwidth of the filter at the receiving end.
In a specific implementation, the position of the virtual carrier that needs to be added is located at a position of a carrier where the current transmission channel will be interfered. For example, in fig. 3, if a carrier with a width Δ f is interfered, when adding a virtual carrier, the virtual carrier may be added at the position of the interfered carrier.
In other embodiments, the virtual carrier adjustment indication information may also only indicate the number of virtual carriers that need to be added, or only indicate the positions of virtual carriers that need to be added, and for information that is not indicated, a default or a pre-agreed manner in a protocol is also adopted to save transmission resources.
In an embodiment of the present invention, after the AP generates the virtual carrier adjustment indication information, the AP may send the virtual carrier adjustment indication information to a receiving end, so that the receiving end can know characteristics of the data frame to be sent. Specifically, the virtual carrier adjustment indication information may be sent by using bits reserved in a header of a data frame to be sent, so as to inform a receiving end whether to add a virtual carrier and an identifier of the added virtual carrier.
And step 44, transmitting the data frame to be transmitted on the current transmission channel.
In specific implementation, when a virtual carrier does not need to be added to the current transmission channel, the data frame to be transmitted is directly transmitted to the current transmission channel without adding the virtual carrier, so that the spectrum utilization efficiency can be effectively improved.
It can be understood that, in a specific implementation, if the current transmission channel is an intermediate channel, and the number of adjacent channels is 2 at this time, for any adjacent channel, the data transmission method described in the above embodiment may be adopted to determine whether the current transmission channel needs to add a virtual carrier. At this time, there may be several cases: firstly, two adjacent channels do not need to be additionally provided with virtual carriers; secondly, one of the adjacent channels needs to be added with virtual carriers, and the other adjacent channel does not need to be added with virtual carriers; thirdly, two adjacent channels need to be added with virtual carriers.
In any case, before transmitting the data frame to be transmitted, the AP needs to determine whether to add virtual carriers for two adjacent channels, and transmits the data frame to be transmitted after the virtual carriers for the two adjacent channels are added.
In addition, in the data transmission method in the embodiment of the present invention, the adjacent channel may not only be immediately adjacent to the current transmission channel, but also have a certain interval.
As can be seen from the above, the data transmission method in the embodiment of the present invention can further suppress interference of an adjacent channel by adding a virtual carrier. And whether to add the virtual carrier is judged by the power of the current transmitting channel and the power of the adjacent channel instead of directly adding the virtual carrier, so that the frequency spectrum efficiency can be effectively improved.
In order to make the present invention better understood and realized by those skilled in the art, the following detailed description is provided for the corresponding apparatus and computer-readable storage medium of the above method.
Referring to fig. 5, an embodiment of the present invention provides a wireless access point 50, where the wireless access point 50 may include: power detection section 51, determination section 52, virtual carrier mapping section 53, and data transmission section 54. Wherein:
the power detection unit 51 is adapted to detect the power of the current transmission channel and the power of the adjacent channel when there is a data frame to be transmitted;
the determining unit 52 is adapted to determine whether to add a virtual carrier on the current transmitting channel based on the power of the current transmitting channel and the power of an adjacent channel;
the virtual carrier mapping unit 53 is adapted to add a virtual carrier on the current transmission channel when the virtual carrier needs to be added on the current transmission channel;
the data sending unit 54 is adapted to transmit the data frame to be sent on the current transmission channel after the virtual carrier is added.
In an embodiment of the present invention, the determining unit 52 may include: a first calculating subunit 521 and a determining subunit 522. Wherein:
the first calculating subunit 521 is adapted to calculate a ratio of the power of the current transmission channel to the power of an adjacent channel;
the determining subunit 522 is adapted to determine that a virtual carrier needs to be added when the ratio of the power of the current transmission channel to the power of the adjacent channel is smaller than or equal to a preset ratio threshold, otherwise, the virtual carrier does not need to be added.
In an embodiment of the present invention, the virtual carrier mapping unit 53 is adapted to generate virtual carrier adjustment indication information when a virtual carrier needs to be added; the virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added; and adding the virtual carrier on the current transmitting channel based on the virtual carrier adjustment indication information.
In an embodiment of the present invention, the number of virtual carriers to be added is related to a bandwidth and a fading value of a transition band of a filter at a receiving end of the data frame to be transmitted.
In an embodiment of the present invention, the position of the virtual carrier that needs to be added is located at a carrier position that will be interfered in the current transmission channel.
In an embodiment of the present invention, the wireless access point 50 may further include: an indication information mapping unit 55, adapted to add the virtual carrier adjustment indication information in the frame header of the data frame to be transmitted.
In an embodiment of the present invention, the data sending unit is adapted to transmit the data frame to be sent on the current transmission channel when it is not necessary to add a virtual carrier on the current transmission channel.
There is further provided in an embodiment of the present invention another wireless access point, including a memory and a processor, the memory having stored thereon a computer program operable on the processor, when executing the computer program, performing the steps of the method of any of the above embodiments.
There is also provided in an embodiment of the present invention a computer readable storage medium having stored thereon a computer program for execution by a processor to perform the steps of the method of any one of the above embodiments.
In particular implementations, the computer-readable storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (14)
1. A data transmission method, comprising:
when a data frame to be transmitted exists, detecting the power of a current transmitting channel and the power of an adjacent channel;
judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of an adjacent channel;
when a virtual carrier needs to be added to the current transmitting channel, adding the virtual carrier to the current transmitting channel, and transmitting the data frame to be transmitted on the current transmitting channel after the virtual carrier is added;
the judging whether to add a virtual carrier on the current transmitting channel based on the power of the current transmitting channel and the power of the adjacent channel comprises the following steps: calculating the ratio of the power of the current transmitting channel to the power of the adjacent channel; and when the ratio of the power of the current transmitting channel to the power of the adjacent channel is less than or equal to a preset ratio threshold, judging that the virtual carrier needs to be added, otherwise, not adding the virtual carrier.
2. The data transmission method of claim 1, wherein when it is required to add a virtual carrier on the current transmission channel, the adding a virtual carrier on the current transmission channel comprises:
when virtual carrier needs to be added, virtual carrier adjustment indication information is generated; the virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added;
and adding a virtual carrier on the current transmitting channel based on the virtual carrier adjustment indication information.
3. The data transmission method as claimed in claim 2, wherein the number of virtual carriers to be added is related to a bandwidth and a fading value of a transition band of a filter at a receiving end of the data frame to be transmitted.
4. The data transmission method as claimed in claim 2, wherein the position of the virtual carrier that needs to be added is located at a carrier position that will be interfered in the current transmission channel.
5. The data transmitting method of claim 2, wherein the frame header of the data frame to be transmitted includes the virtual carrier adjustment indication information.
6. The data transmission method as claimed in claim 1, further comprising: and when the virtual carrier does not need to be added on the current transmitting channel, transmitting the data frame to be transmitted on the current transmitting channel.
7. A wireless access point, comprising:
the device comprises a power detection unit, a channel selection unit and a channel selection unit, wherein the power detection unit is suitable for detecting the power of a current transmission channel and the power of an adjacent channel when a data frame to be transmitted exists;
the judging unit is suitable for judging whether virtual carriers need to be added on the current transmitting channel or not based on the power of the current transmitting channel and the power of an adjacent channel;
a virtual carrier mapping unit, adapted to add a virtual carrier on the current transmission channel when the virtual carrier needs to be added on the current transmission channel;
the data sending unit is suitable for transmitting the data frame to be sent on the current transmitting channel after the virtual carrier is added;
the judging unit includes: the first calculating subunit is suitable for calculating the ratio of the power of the current transmitting channel to the power of an adjacent channel; and the judging subunit is suitable for judging that the virtual carrier needs to be added when the ratio of the power of the current transmitting channel to the power of the adjacent channel is less than or equal to a preset ratio threshold, otherwise, the virtual carrier does not need to be added.
8. The wireless access point of claim 7, wherein the virtual carrier mapping unit is adapted to generate virtual carrier adjustment indication information when a virtual carrier needs to be added; the virtual carrier adjustment indication information is used for indicating the number and the position of virtual carriers needing to be added; and adding a virtual carrier on the current transmitting channel based on the virtual carrier adjustment indication information.
9. The wireless access point of claim 8, wherein the number of virtual carriers to be added is related to a bandwidth and a fading value of a transition band of a filter at a receiving end of the data frame to be transmitted.
10. The wireless access point of claim 8, wherein the location of the virtual carrier that needs to be added is at a carrier location that will be interfered with in the current transmission channel.
11. The wireless access point of claim 8, further comprising: and the indication information mapping unit is suitable for adding the virtual carrier adjustment indication information in the frame header of the data frame to be sent.
12. The wireless access point of claim 7, wherein the data transmitting unit is adapted to transmit the data frame to be transmitted on the current transmission channel when it is not necessary to add a virtual carrier on the current transmission channel.
13. A wireless access point comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, the processor when executing the computer program performing the steps of the method of any of claims 1 to 6.
14. A computer-readable storage medium, on which a computer program is stored, which computer program is executable by a processor for carrying out the steps of the method according to any one of claims 1 to 6.
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| CN202011043290.XA CN112188550B (en) | 2020-09-28 | 2020-09-28 | Data transmission method, wireless access point and computer readable storage medium |
| PCT/CN2021/114442 WO2022062811A1 (en) | 2020-09-28 | 2021-08-25 | Data transmission method, wireless access point, and computer readable storage medium |
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| WO2008035171A2 (en) * | 2006-09-18 | 2008-03-27 | Nokia Corporation | Adjusting guard band size by qos data positioning in the spectrum band |
| CN101621366B (en) * | 2008-07-01 | 2012-11-14 | 富士通株式会社 | Adaptive transmission method and system for radio communication system |
| CN102377495B (en) * | 2010-08-13 | 2015-08-12 | 中兴通讯股份有限公司 | Radio frequency detection method, Apparatus and system |
| CN102917448B (en) * | 2011-08-03 | 2017-04-12 | 中兴通讯股份有限公司 | System, device and method for transmitting cell information |
| KR101986865B1 (en) * | 2011-11-04 | 2019-06-07 | 인터디지탈 패튼 홀딩스, 인크 | Method and apparatus for power control for wireless transmissions on multiple component carriers associated with multiple timing advances |
| CN104955144B (en) * | 2011-12-19 | 2021-05-18 | 华为技术有限公司 | Uplink transmission power control method and user equipment |
| CN103023850B (en) * | 2012-11-28 | 2015-03-04 | 北京工业大学 | Variable-bandwidth OFDM (Orthogonal Frequency Division Multiplexing) transmitter and receiver |
| CN107277817A (en) * | 2016-04-08 | 2017-10-20 | 中兴通讯股份有限公司 | A kind of guard band application method and radio device |
| US10462752B2 (en) * | 2017-12-01 | 2019-10-29 | At&T Intellectual Property I, L.P. | Transmitting content using guard band frequencies at reduced power |
| US10750492B2 (en) * | 2017-12-20 | 2020-08-18 | Qualcomm Incorporated | Resource assignment in NR-SS |
| CN110996342B (en) * | 2019-12-16 | 2022-03-04 | 展讯通信（上海）有限公司 | STF transmitting and receiving method and device, storage medium and terminal |
| CN112188550B (en) * | 2020-09-28 | 2022-12-06 | 展讯通信（上海）有限公司 | Data transmission method, wireless access point and computer readable storage medium |
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