WO2021073471A1

WO2021073471A1 - Sending end, receiving end, and bandwidth switching method

Info

Publication number: WO2021073471A1
Application number: PCT/CN2020/120343
Authority: WO
Inventors: 朱凯; 蒋冰; 袁天
Original assignee: 华为技术有限公司
Priority date: 2019-10-18
Filing date: 2020-10-12
Publication date: 2021-04-22
Also published as: CN112688883B; CN112688883A

Abstract

Disclosed are a sending end, a receiving end, and a bandwidth switching method. The sending end, the receiving end, and the bandwidth switching method are applied to continuous transmission scenarios, such as optical fiber transmission, broadband access in a cable manner of a cable television, and microwave communication. The bandwidth switching method comprises: the sending end sending a first frame carrying switching information and service information to the receiving end; and the receiving end acquiring the switching information and the service information from the first frame, and adjusting symbol bandwidth by using the switching information, such that the receiving end can receive the second frame, carrying the service information, sent by the sending end. Therefore, the symbol bandwidth for transmitting the service information between the sending end and the receiving end can be adjusted without interrupting service.

Description

Sending end, receiving end and bandwidth switching method

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 18, 2019, the application number is 201910995743.X, and the invention title is "a sender, receiver, and bandwidth switching method", all of which are approved The reference is incorporated in this application.

Technical field

The embodiments of the present application relate to the communication field, and in particular, to a sending end, a receiving end, and a bandwidth switching method.

Background technique

In a communication system, throughput refers to the number of payload bits transmitted per unit time. Generally, the larger the transmission capacity, the more data is transmitted per unit time. Therefore, the larger the transmission capacity, the easier it is to meet the user's data transmission needs. Because, under the condition that the modulation mode and code rate remain unchanged, the size of the transmission capacity is positively correlated with the size of the symbol bandwidth. Therefore, the symbol bandwidth can be adjusted to adjust the transmission capacity.

In the existing solution for adjusting the symbol bandwidth, if the symbol bandwidth between the sending end and the receiving end needs to be switched from the first symbol bandwidth to the second symbol bandwidth, the sending end will first interrupt the transmission using the first symbol bandwidth. Service, and then establish a transmission using the second symbol bandwidth between the sending end and the receiving end. After the new transmission is established, the sending end is using the second symbol bandwidth to transmit the service to the receiving end.

In such a solution, the service transmission between the sending end and the receiving end will be interrupted, thereby increasing the data message delay.

Summary of the invention

The embodiments of the present application provide a sending end, a receiving end, and a bandwidth switching method, which are used to adjust the symbol bandwidth for transmitting service information between the sending end and the receiving end without interrupting services.

In the first aspect, an embodiment of the present application provides a sending end, and the sending end includes the following parts: a receiving module and a sending module. Among them, the receiving module is used to receive business information. The sending module is configured to use the first symbol bandwidth to send the service information to the receiving end, and the service information is located in the first frame. In addition, the sending module is further configured to use the second symbol bandwidth to send the service information and redundant information to the receiving end, where the service information and the redundant information are located in the second frame. Wherein, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.

In the embodiment of the present application, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information. Also, because the first frame only carries service information, the second frame also carries redundant information in addition to the service information. Therefore, the sender needs to transmit more information within the time of transmitting the first frame, and therefore, it can be determined that the rate at which the sender transmits the first frame is lower than the rate at which the sender transmits the second frame. Since the sending end carries service information in both the first frame and the second frame of transmission, the service information is information of the same service. Therefore, the sending end is in the process of switching the first symbol bandwidth to the second symbol bandwidth. The transmission of the service information is always maintained in the middle, therefore, the data message delay will not increase, and the interruption of service transmission is avoided.

According to the first aspect, in the first implementation manner of the first aspect of the embodiments of the present application, the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and The difference in the bandwidth of the first symbol.

In this embodiment, since the first frame sent by the sender to the receiver carries switching information in addition to the service information, not only can the receiver be notified to adjust the symbol bandwidth before the sender switches the symbol bandwidth, but also the The receiving end obtains the service information from the first frame to ensure the continuation of the service.

According to the first implementation manner of the first aspect, in the second implementation manner of the first aspect of the embodiments of the present application, the switching information includes any one of the following: the identification of the switching step, and the identification of the switching step is used for Indicate a switching step; or, the switching step; or, the second cycle, the second cycle corresponds to one of the switching steps, and the second cycle is the duration of transmitting one symbol using the second symbol bandwidth; or, The number of symbols carrying the service information and the number of symbols carrying the redundant information.

In this embodiment, when the switching information is the identification of the switching step, the identification of the switching step corresponds to the switching step in a one-to-one correspondence. Therefore, when the sending end sends the identification of the switching step to the receiving end, the receiving end can learn the switching step by looking up the table of correspondence between the identification and the switching step. In such an implementation manner, since the amount of identification data for sending the switching step is only 1 bit or 2 bits, the switching information only occupies a small part of the transmission resources in the first frame, which is beneficial to the first frame. Carry more business information.

When the switching information is the switching step, the receiving end can directly determine the amount by which the symbol bandwidth needs to be adjusted according to the switching step sent by the sending end. Therefore, compared with the previous implementation manner, the receiving end does not need to perform a table look-up operation, and can directly learn the switching step, which is beneficial to reducing the calculation amount of the receiving end and reducing the calculation load of the receiving end.

When the switching information is the second period, the second period is the duration of transmitting one symbol using the second symbol bandwidth, and the reciprocal of the second period is the second symbol bandwidth. Also, since the size of the first symbol bandwidth is known to the receiving end, the receiving end can calculate the difference between the second symbol bandwidth and the first symbol bandwidth, that is, the switching step. Therefore, there is a corresponding relationship between the second period and the switching step. Compared with the foregoing implementation, this implementation method adds a way to indicate the switching step, which can make the switching information sent by the sending end to the receiving end flexible and diverse.

When the handover information includes the number of symbols carrying the service information and the number of symbols carrying the redundant information, since the time required to transmit a frame is known to both the sender and the receiver, when this frame is determined The number of symbols transmitted in, the time length of transmitting each symbol can be calculated, that is, the aforementioned second period. Because there is a corresponding relationship between the foregoing second period and the foregoing switching step. Therefore, the sending end can inform the receiving end of the switching step by indicating the number of symbols carrying the service information and the number of symbols carrying the redundant information to the receiving end. In addition, although the receiving end knows the number of symbols carrying service information contained in the first frame, the second frame contains redundant information. When the receiving end learns the number of symbols carrying the service information and the number of symbols carrying the service information After the number of redundant information symbols, the receiving end can demodulate the symbols carrying service information more accurately, and discard the symbols carrying redundancy. It is beneficial to prevent the receiving end from discarding the symbols carrying service information and causing loss of data transmission.

According to the second implementation manner of the first aspect, in the third implementation manner of the first aspect of the embodiments of the present application, the switching information further includes the number of switching times, and the number of switching times is the number of times the sending end switches the symbol bandwidth according to the switching step. frequency.

In this embodiment, the receiving end can learn whether the symbol bandwidth needs to be switched for several frames after the second frame, which is beneficial to the receiving end to prepare for the subsequent switching operation.

According to any one of the first aspect, the first implementation manner of the first aspect to the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect of the embodiments of the present application, the sending end It also includes a processing module; the processing module is used to configure the redundant information at the end of the service information to obtain the second frame.

According to the fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect of the embodiments of the present application, the processing module includes a first-in first-out module FIFO and a selector. Wherein, the FIFO is used to buffer the service information and input the service information to the selector; the selector is used to configure the redundant information at the end of the service information to obtain the second frame, and follow the first The second frame is output at the frequency corresponding to the two cycles.

According to the fourth implementation manner of the first aspect, in the sixth implementation manner of the first aspect of the embodiments of the present application, the processing module includes a random access memory RAM, and the RAM is used to cache the business information. At the end, the redundant information is configured to obtain the second frame, and the second frame is output according to the frequency corresponding to the second period.

In a second aspect, an embodiment of the present application provides a receiving end, which includes the following parts: a receiving module, configured to receive service information from the sending end using a first symbol bandwidth, the service information being located in a first frame. In addition, the receiving module is also configured to receive the service information and redundant information from the sending end using the second symbol bandwidth, the service information and the redundant information are located in the second frame, and the first symbol bandwidth is used to transmit the service The duration of the information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.

In the embodiment of the present application, because the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information. Also, because the first frame only carries service information, the second frame also carries redundant information in addition to the service information. Therefore, the sender needs to transmit more information within the time of transmitting the first frame, and therefore, it can be determined that the rate at which the sender transmits the first frame is lower than the rate at which the sender transmits the second frame. Since the sending end carries service information in both the first frame and the second frame of transmission, the service information is information of the same service. Therefore, the sending end is in the process of switching the first symbol bandwidth to the second symbol bandwidth. The transmission of the service information is always maintained in the middle, therefore, the data message delay will not increase, and the interruption of service transmission is avoided.

According to the second aspect, in the first implementation manner of the second aspect of the embodiments of the present application, the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and The difference in the bandwidth of the first symbol.

According to the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the embodiments of the present application, the switching information includes any one of the following: the identification of the switching step, and the identification of the switching step is used for Indicate a switching step; or, the switching step; or, the second cycle, the second cycle corresponds to one of the switching steps, and the second cycle is the duration of transmitting one symbol using the second symbol bandwidth; or, The number of symbols carrying the service information and the number of symbols carrying the redundant information.

According to the second implementation manner of the second aspect, in the third implementation manner of the second aspect of the embodiments of the present application, the switching information further includes the number of switching times, and the number of switching times is the number of times the sending end switches the symbol bandwidth according to the switching step. frequency.

In this embodiment, the receiving end can learn whether the symbol bandwidth needs to be switched for several frames after the second frame, which is beneficial for the receiving end to prepare for the subsequent switching operation.

According to the second aspect, the first implementation manner of the second aspect to the third implementation manner of the second aspect, in the fourth implementation manner of the second aspect of the embodiments of the present application, the receiving end It includes a processing module; the processing module is used to extract the switching information from the first frame; the processing module is also used to adjust the sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period.

In this embodiment, the processing module is beneficial to compensate for the frequency deviation of the transceiver and improve the efficiency of symbol bandwidth switching.

In a third aspect, an embodiment of the present application provides a sending end, and the sending end includes the following parts: a receiving module configured to receive first information of a service and second information of the service. The sending module is configured to send the first information to the receiving end using the first symbol bandwidth, and the first information is located in the first frame. In addition, the sending module is also configured to use the second symbol bandwidth to send the second information to the receiving end. The second information is located in the second frame. The symbol bandwidth has the same duration for transmitting the second information, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.

In this embodiment, the duration of transmitting the first information using the first symbol bandwidth is the same as the duration of transmitting the second information using the second symbol bandwidth. The number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Because, in the same time, the first frame and the second frame respectively transmit different numbers of symbols. Therefore, the rate at which each symbol in the first frame is transmitted is different from the rate at which each symbol in the second frame is transmitted. Because the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Therefore, the rate at which each symbol in the first frame is transmitted is greater than the rate at which each symbol in the second frame is transmitted. Since both the first frame and the second frame carry service information, that is, the foregoing first information and the foregoing second information are both information of the service, so the sending end is switching the bandwidth of the first symbol to the second symbol. In the process of symbol bandwidth, the transmission of the information of the service is always maintained, so the data message delay will not be increased, and the interruption of service transmission is avoided.

According to the third aspect, in the first implementation manner of the third aspect of the embodiments of the present application, the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and The difference in the bandwidth of the first symbol.

In this embodiment, since the first frame sent by the sending end to the receiving end carries switching information in addition to the first information of the service, not only can the receiving end be notified to adjust the symbol bandwidth before the sending end switches the symbol bandwidth, but also The receiving end may obtain the first information from the first frame to ensure the continuous operation of the service.

According to the first implementation manner of the third aspect, in the second implementation manner of the third aspect of the embodiments of the present application, the switching information includes any one of the following: the identification of the switching step, and the identification of the switching step is used for Indicate a switching step; or, the switching step; or, the second cycle, the second cycle corresponds to one of the switching steps, and the second cycle is the duration of transmitting one symbol using the second symbol bandwidth; or, The number of symbols carrying the second information.

According to the second implementation manner of the third aspect, in the third implementation manner of the third aspect of the embodiments of the present application, the switching information further includes the number of switching times, and the number of switching times is the number of times the sending end switches the symbol bandwidth according to the switching step. frequency.

In a fourth aspect, an embodiment of the present application provides a receiving end. The receiving end includes the following parts: a receiving module for receiving first information of a service from the transmitting end using a first symbol bandwidth, the first information being located in the first frame in. In addition, the receiving module is also configured to use the second symbol bandwidth to receive the second information of the service from the transmitting end, the second information is located in the second frame, and the first symbol bandwidth is used to transmit the first information and the length of time The second symbol bandwidth is used to transmit the second information for the same duration, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.

In this embodiment, in the same time, the first frame and the second frame respectively transmit different numbers of symbols. Therefore, the rate at which each symbol in the first frame is transmitted is different from the rate at which each symbol in the second frame is transmitted. Because the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Therefore, the rate at which each symbol in the first frame is transmitted is greater than the rate at which each symbol in the second frame is transmitted. Since both the first frame and the second frame carry service information, that is, the foregoing first information and the foregoing second information are both information of the service, so the sending end is switching the bandwidth of the first symbol to the second symbol. In the process of symbol bandwidth, the transmission of the information of the service is always maintained, so the data message delay will not be increased, and the interruption of service transmission is avoided.

According to the fourth aspect, in the first implementation manner of the fourth aspect of the embodiments of the present application, the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and The difference in the bandwidth of the first symbol.

According to the first implementation manner of the fourth aspect, in the second implementation manner of the fourth aspect of the embodiments of the present application, the switching information includes any one of the following: the identification of the switching step, and the identification of the switching step is used To indicate a switching step; or, the switching step; or, the second period, the second period corresponding to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth; or , The number of symbols carrying the second information.

According to the second implementation manner of the fourth aspect, in the third implementation manner of the fourth aspect of the embodiments of the present application, the switching information further includes the number of switching times, and the number of switching times is that the sending end switches the symbol bandwidth according to the switching step. The number of times.

According to the fourth aspect, the first implementation manner of the fourth aspect to the third implementation manner of the fourth aspect, in the fourth implementation manner of the fourth aspect of the embodiments of the present application, the receiving end Including processing modules. Wherein, the processing module is used to extract the switching information from the first frame. In addition, the processing module is further configured to adjust the sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period.

In a fifth aspect, the embodiments of the present application provide a bandwidth switching method. In the method, the sending end receives service information, and then the sending end uses the first symbol bandwidth to send the service information to the receiving end, where the service information is located in In the first frame. Then, the sending end uses the second symbol bandwidth to send the service information and redundant information to the receiving end, where the service information and the redundant information are located in the second frame. Secondly, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.

According to a fifth aspect, in a first implementation manner of the fifth aspect of the embodiments of the present application, the method further includes: the sending end receives confirmation information from the receiving end, the confirmation information being used to indicate that the receiving end has received the handover information .

In this embodiment, since the confirmation information is used to indicate that the receiving end has received the handover information, it is beneficial for the sending end to learn that the receiving end demodulates the first frame. Therefore, the sending end does not need to wait any longer after receiving the confirmation information, and the sending end can send the second frame to the receiving end. Therefore, it is beneficial to reduce the time delay of data transmission between the sender and the receiver, thereby improving the transmission efficiency.

According to the fifth aspect or the first implementation manner of the fifth aspect, in the second implementation manner of the fifth aspect of the embodiments of the present application, the method further includes: the transmitting end receives transmission quality information from the receiving end, and the transmission quality The information is used to indicate the quality of the receiving end that uses the second symbol bandwidth to receive the second frame.

In this embodiment, the sending end can determine whether to continue to adjust the symbol bandwidth according to the quality of the transmission quality information. Therefore, the sending end can enable the symbol bandwidth to be gradually and smoothly switched while ensuring the quality of information transmission, thereby avoiding the unstable symbol bandwidth and affecting the user's service experience.

In a sixth aspect, an embodiment of the present application provides a bandwidth switching method. In this method, the receiving end uses the first symbol bandwidth to receive service information from the sending end, and the service information is located in the first frame. Then, the receiving end uses the second symbol bandwidth to receive the service information and the redundant information from the sending end, where the service information and the redundant information are located in the second frame. Wherein, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.

According to a sixth aspect, in a first implementation manner of the sixth aspect of the embodiments of the present application, the method further includes: the receiving end sends confirmation information to the sending end, the confirmation information being used to indicate that the receiving end has received the handover information .

According to the sixth aspect or the first implementation manner of the sixth aspect, in the second implementation manner of the sixth aspect of the embodiments of the present application, the method further includes: the receiving end sends transmission quality information to the sending end, and the transmission quality The information is used to indicate the quality of the receiving end that uses the second symbol bandwidth to receive the second frame.

In a seventh aspect, an embodiment of the present application provides a bandwidth switching method, in which the sending end receives the first information of the service and the second information of the service. Then, the sending end uses the first symbol bandwidth to send the first information to the receiving end, and the first information is located in the first frame. Then, the sending end uses the second symbol bandwidth to send the second information to the receiving end. The second information is located in the second frame. The first information is transmitted using the first symbol bandwidth and the second symbol bandwidth is used to transmit the second information. The duration of the second information is the same, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.

According to a seventh aspect, in a first implementation manner of the seventh aspect of the embodiments of the present application, the method further includes: the sending end receives confirmation information from the receiving end, the confirmation information being used to indicate that the receiving end has received the handover information .

According to the seventh aspect or the first implementation manner of the seventh aspect, in the second implementation manner of the seventh aspect of the embodiments of the present application, the method further includes: the transmitting end receives the transmission quality information from the receiving end, and the transmission quality The information is used to indicate the quality of the receiving end that uses the second symbol bandwidth to receive the second frame.

In an eighth aspect, an embodiment of the present application provides a bandwidth switching method. In the method, the receiving end uses the first symbol bandwidth to receive first information of the service from the transmitting end, and the first information is located in the first frame. Then, the receiving end uses the second symbol bandwidth to receive the second information of the service from the sending end, and the second information is located in the second frame. Wherein, the duration of transmitting the first information using the first symbol bandwidth is the same as the duration of transmitting the second information using the second symbol bandwidth, and the number of symbols carrying the first information in the first frame is greater than that in the second frame The number of symbols carrying the second information.

According to the eighth aspect, in the first implementation manner of the eighth aspect of the embodiments of the present application, the method further includes: the receiving end sends confirmation information to the sending end, the confirmation information being used to indicate that the receiving end has received the handover information .

According to the eighth aspect or the first implementation manner of the eighth aspect, in the second implementation manner of the eighth aspect of the embodiments of the present application, the method further includes: the receiving end sends transmission quality information to the sending end, and the transmission quality The information is used to indicate the quality of the receiving end that uses the second symbol bandwidth to receive the second frame.

In a ninth aspect, an embodiment of the present application provides a communication system, including: a sending end and a receiving end; the sending end executes the methods described in the fifth aspect and various implementation manners of the fifth aspect; the receiving end executes The sixth aspect and the methods introduced in the various implementations of the sixth aspect.

In a tenth aspect, an embodiment of the present application provides a communication system, including; a sending end and a receiving end; the sending end executes the methods described in the seventh aspect and various implementation manners of the seventh aspect; the receiving end executes The eighth aspect and the methods introduced in various implementation manners of the eighth aspect.

In an eleventh aspect, an embodiment of the present application provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the fifth aspect and various implementation manners of the fifth aspect, or the sixth aspect. Aspects and various implementation manners of the sixth aspect, various implementation manners of the seventh aspect and the seventh aspect, or the eighth aspect and various implementation manners of the eighth aspect.

In the twelfth aspect, the embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the fifth aspect and various implementation manners of the fifth aspect, or the sixth aspect and The methods introduced in the various implementation manners of the sixth aspect, the seventh aspect and the seventh aspect, or the eighth aspect and the eighth aspect.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

Description of the drawings

In order to more clearly describe the technical solutions of the embodiments of the present application, the accompanying drawings required in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application.

FIG. 1A is an application scenario diagram of the bandwidth switching method in an embodiment of the application;

FIG. 1B is another application scenario diagram of the bandwidth switching method in an embodiment of this application;

FIG. 1C is a schematic diagram of a bandwidth switching method in an embodiment of the application;

FIG. 1D is a schematic diagram of an embodiment of the sending end in an embodiment of the application;

FIG. 1E is a schematic diagram of another embodiment of the sending end in an embodiment of this application;

FIG. 1F is a schematic diagram of an embodiment of the receiving end in an embodiment of the application;

FIG. 1G is a schematic diagram of another embodiment of the receiving end in an embodiment of this application;

2A is a schematic diagram of another embodiment of the sending end in an embodiment of this application;

2B is a schematic diagram of another embodiment of the sending end in an embodiment of the application;

2C is a schematic diagram of another embodiment of the sending end in an embodiment of the application;

2D is a schematic diagram of another embodiment of the sending end in an embodiment of this application;

FIG. 2D-1 is a schematic diagram of an embodiment of a first frame structure in an embodiment of this application;

2D-2 is a schematic diagram of an embodiment of a second frame structure in an embodiment of the application;

2E is a schematic diagram of another embodiment of the sending end in an embodiment of this application;

2E-1 is a schematic diagram of another embodiment of the first frame structure in an embodiment of the application;

2E-2 is a schematic diagram of another embodiment of the second frame structure in an embodiment of this application;

2F is a schematic diagram of another embodiment of the sending end in an embodiment of this application;

FIG. 3A is a schematic diagram of another embodiment of the receiving end in an embodiment of the application;

FIG. 3B is a schematic diagram of another embodiment of the receiving end in the embodiment of this application;

3C is a schematic diagram of another embodiment of the receiving end in the embodiment of the application;

FIG. 3D is a schematic diagram of another embodiment of the receiving end in the embodiment of this application;

FIG. 3E is a schematic diagram of another embodiment of the receiving end in an embodiment of this application;

FIG. 4 is a flowchart of a bandwidth switching method in an embodiment of the application;

Fig. 5 is another flowchart of the bandwidth switching method in an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in a sequence other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

For ease of understanding, some technical terms involved in the embodiments of this application are explained below:

Transmission capacity (throughput): Refers to the number of payload bits transmitted in a unit time, in Mbps or M·bit/s. The transmission capacity is related to the modulation mode, code rate, and symbol bandwidth, and the relationship can be expressed as: T=M×R×F. Among them, M is the modulation mode (M-ary Modulation), the unit is bit, which represents the number of bits carried in each transmitted symbol. For example, when the modulation mode is 16QAM modulation, M=4bit; when the modulation mode is 256QAM modulation, M=8bit. R is the code rate (rate), the unit is %, which represents the ratio of payload bits to the bits of the transmitted symbol. For example, when the modulation mode is 256QAM, each transmitted symbol has 8 bits, of which 6 bits are payload bits and 2 bits are overhead. Therefore, the code rate is 75%. F is the symbol frequency (symbol frequency), the unit is MHz, which represents the frequency range occupied by the various frequency components contained in the transmitted symbol, that is, the frequency of the transmitted symbol, and is also called the frequency domain signal width or channel bandwidth. 1/F is the period, which refers to the length of time that one symbol is sent using the symbol bandwidth. Among them, when the unit of the symbol bandwidth F is MHz, the unit of the period 1/F is us; when the unit of the symbol bandwidth F is KHz, the unit of the period 1/F is ms; when the unit of the symbol bandwidth F is When the unit is Hz, the unit of this period 1/F is s.

Symbol: Also known as transmission symbol or constellation symbol, it refers to a transmission unit obtained by modulating multiple bits.

Modulation mapping (MAP): Also known as constellation mapping or constellation modulation, it refers to a type of modulation method that can map multiple bits into one transmission unit, that is, modulate multiple bits into one symbol. For example, quadrature phase shift keying (quadrature phase shift keying, QPSK) modulation, binary phase shift keying (binary phase shift keying, BPSK) modulation, and quadrature amplitude modulation (quadrature amplitude modulation, QAM), etc.

Random access memory (RAM): It is an internal memory that directly exchanges data with a central processing unit (CPU). Information can be written (stored in) or read (taken out) from any designated address at any time, and is usually used as a temporary data storage medium for operating systems or other running programs.

Crystal oscillator (crystal oscillator): also known as quartz crystal resonator, crystal oscillator for short, refers to the crystal element that adds an integrated circuit (IC) to form an oscillator circuit, which can generate a standard pulse signal as a synchronous clock in a digital circuit .

Root raised cosine filter (RRC): also known as square root raised cosine filter (SRRC), used to eliminate inter-symbol interference (ISI) and improve reception The sampling accuracy of the signal received at the end.

Interpolation filter (Interp): used to interpolate between discrete signals to change the sampling rate of the signal.

The following describes the application scenarios of the sending end, the receiving end, and the bandwidth switching method proposed in the embodiments of the present application:

In this embodiment, the sending end and the receiving end are located in two different network devices. When the symbol bandwidth for data transmission between the aforementioned two different network devices needs to be switched, the aforementioned sending end and the aforementioned receiving end will use the bandwidth switching method proposed in the embodiment of the present application to switch the symbol bandwidth.

In practical applications, the sending end may be a device or a chip in the device, and the receiving end may also be a device or a chip in the device, which is not specifically limited here. Whether as a device or as a chip, the sending end or the receiving end can be manufactured, sold, or used as an independent product.

It should also be noted that in practical applications, the sending end and the receiving end are often manufactured as chips. As shown in FIG. 1A, the sending end and the receiving end can be integrated into a chip, that is, the chip has both the function of the sending end and the function of the receiving end. At this time, it is sufficient to install a chip in the network device 1 and the network device 2 respectively. As shown in FIG. 1B, the sending end and the receiving end can also be manufactured as two chips with different functions, that is, one chip has the function of the sending end, and the other chip has the function of the receiving end. At this time, both the network device 1 and the network device 2 need to install a chip with a transmitter function and a chip with a receiver function. It should be understood that in actual applications, the number of chips in each of the aforementioned network devices will vary due to different application scenarios, and the specific number is not limited here.

In addition, the aforementioned network equipment may be a radio access network (radio access network, RAN) equipment. Specifically, the RAN device may be a base station or an access point, or a device that communicates with the terminal device through one or more cells on the air interface in the access network. For example, the RAN equipment can be the next generation node B (gNB) in the new wireless NR system, or the centralized unit (CU) and distributed unit in the Cloud RAN system. (distributed unit, DU), the embodiment of this application is not limited. The aforementioned network device may also be a wireless network backhaul device (radio backhaul), which is specifically used for communication between the base station and the base station from the remote site to the central site. The aforementioned network equipment may also be an integrated access and backhaul (IAB) base station, which is not specifically limited here.

It should be understood that, in addition to the foregoing scenarios, the bandwidth switching method can also be applied to other continuous transmission scenarios, such as optical fiber transmission scenarios, broadband access scenarios in cable television mode, and various digital subscriber lines ( Digital subscriber line (DSL) transmission scenarios and microwave communication scenarios, etc., are not specifically limited here.

To facilitate the understanding of the bandwidth switching method proposed in the embodiment of the present application, the implementation principle of the bandwidth switching method will be introduced below.

In wireless communication, the unit of data transmission between the sending end and the receiving end can be a frame, and a frame contains multiple symbols. Among them, each symbol contains multiple information bits that need to be transmitted between the sender and the receiver. The foregoing multiple information bits can be modulated and mapped to form the foregoing one symbol. For example, if two bits are divided into a group for modulation, the aforementioned two bits can be QPSK modulated into one symbol. It should be understood that in actual applications, different modulation and mapping modes can be used according to different scene requirements, and the specifics are not limited here.

Generally, although the clock generated by the crystal oscillator at the transmitting end is partially offset from the clock generated by the crystal oscillator at the receiving end, the clock at the transmitting end is not completely synchronized with the clock at the receiving end. However, installing a symbol synchronization loop at the receiving end can keep the clock of the receiving end synchronized with the clock of the sending end. Therefore, when the sending end and the receiving end negotiate in advance the number of symbols contained in one or more frames and the time required to send each symbol, the sending end sends a frame to the receiving end at the same time, the receiving end The end can receive the frame at the rate at which the sender sends the frame, that is, the symbol bandwidth of the frame sent by the sender is the same as the symbol bandwidth of the frame received by the receiver. When the sending end needs to adjust the symbol bandwidth, the sending end can adjust the symbol bandwidth by adjusting the duration of sending each symbol in the frame. Since the symbol bandwidth is inversely related to the duration of each symbol sent by the transmitter, the symbol bandwidth can be increased by reducing the duration of each symbol sent by the transmitter, and the duration of each symbol sent by the transmitter can be increased to reduce Small symbol bandwidth.

For ease of understanding, the frame structure shown in FIG. 1C is taken as an example for introduction. It is assumed that the clocks of the sending end and the receiving end are synchronized, and it is negotiated in advance that a frame contains 200 symbols, where the 200 symbols include the frame header preamble and payload symbols. For example, the 1st to 10th symbols are the preamble part of the frame header, and the 11th to 200th symbols are the payload symbol part, and the payload symbol part is the information that actually needs to be transmitted. In practical applications, the number of symbols included in the preamble part of the frame header and the number of symbols included in the payload symbol part can be adjusted according to specific requirements, which are not specifically limited here. In addition, assuming that the time required for the sending end to send a frame is T, the time required for the sending end to send each symbol is T/200, and the symbol bandwidth is 200/T. When the sending end needs to increase the bandwidth, the sending end can reduce the time to send each symbol. For example, if the time for sending each symbol is adjusted to T/205, at this time, the sending end can send 205 symbols within the original time of sending 200 symbols. Therefore, the transmitter will configure 5 symbols after the aforementioned 200 symbols, and these 5 symbols are redundant symbols configured to maintain time synchronization. At this time, the receiving end needs to adjust the time of receiving each symbol to T/205 according to the instructions of the sending end to ensure synchronization with the sending end. When the receiving end adjusts the time for receiving each symbol to T/205, the receiving end also adjusts the symbol bandwidth to 205/T. Thus, the switching of the symbol bandwidth is completed.

It should be understood that the frame structure shown in FIG. 1C is only an example for introducing the principle of adjusting the symbol bandwidth, and does not limit the frame structure in this embodiment and subsequent embodiments.

The implementation principle of the bandwidth switching method in the embodiment of the present application has been introduced above, and the main structures of the transmitting end and the receiving end proposed in the embodiments of the present application will be respectively introduced below.

The following first introduces the main structure of the sender:

When the sending end performs the function of increasing the symbol bandwidth, as shown in FIG. 1D, the sending end 10 includes a receiving module 101 and a sending module 102. Wherein, the receiving module 101 is configured to receive service information, and the service information refers to information of the service performed between the sending end and the receiving end. The sending module 102 is configured to use the first symbol bandwidth to send the service information to the receiving end. The service information is located in the first frame, that is, the data transmission between the sending end and the receiving end is in units of frames, and the sending module 102 sends the service information to the receiving end through the first frame. In addition, the sending module 102 is also configured to use the second symbol bandwidth to send the service information and redundant information to the receiving end. The service information and the redundant information are located in the second frame, that is, the sending module 102 encapsulates the service information and the redundant information in the second frame to send to the receiving end.

It should be understood that, in this embodiment, the foregoing first symbol bandwidth is smaller than the foregoing second symbol bandwidth.

Wherein, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information. Also, because the first frame only carries service information, the second frame also carries redundant information in addition to the service information. Therefore, the sender needs to transmit more information within the time of transmitting the first frame, and therefore, it can be determined that the rate at which the sender transmits the first frame is lower than the rate at which the sender transmits the second frame. Since the sending end carries service information in both the first frame and the second frame of transmission, the service information is information of the same service. Therefore, the sending end is in the process of switching the first symbol bandwidth to the second symbol bandwidth. The transmission of the service information is always maintained in the middle, therefore, the data message delay will not increase, and the interruption of service transmission is avoided.

In addition, the sending end also includes a processing module 103. The processing module 103 is configured to configure the redundant information at the end of the service information to obtain the second frame. Then, the processing module 103 transmits the second frame to the sending module 102, so that the sending module 102 sends the second frame to the receiving end.

Specifically, the receiving module 101 in the sending end 10 in FIG. 1D may be the switching information receiving module 202 in FIG. 2A later, and the sending module 102 may be the first transceiver module 205 in FIG. 2A later, and the processing module 103 includes the symbol bandwidth adaptation module 203, the first switching controller 201, and the symbol bandwidth enabling module 204 in FIG. 2A below. Specifically, please refer to the related introduction in Figure 2A below.

Further, the processing module 103 may adopt the following implementation modes:

In an optional implementation manner, the processing module 103 includes a first-in first-out module FIFO and a selector. Wherein, the FIFO is used to buffer the business information and input the business information to the selector. The selector is configured to configure the redundant information at the end of the service information to obtain the second frame, and output the second frame according to the frequency corresponding to the second period. Specifically, the processing module may adopt the implementation manner of the symbol bandwidth adaptation module 203 in FIG. 2A below. In addition, for the specific functions of the aforementioned FIFO and the aforementioned selector, please refer to the related introduction of the FIFO 2031 and the selector 2032 in FIG. 2B later, and the details will not be repeated here.

In another optional implementation manner, the processing module 103 includes a random access memory RAM, which is used to cache the service information, configure the redundant information at the end of the service information to obtain the second frame, and follow The second frame is output at the frequency corresponding to the second period. Specifically, the processing module may adopt the implementation manner of the symbol bandwidth adaptation module 203 in FIG. 2A below. In addition, the specific functions of the aforementioned RAM can be referred to the related introduction in RAM 2033 in FIG. 2C later, and details are not repeated here.

In addition, the aforementioned first frame further includes switching information, which is used to indicate a switching step, and the switching step is the difference between the second symbol bandwidth and the first symbol bandwidth.

Optionally, the switching information may be an identification of the switching step, and the identification of the switching step is used to indicate a switching step. At this time, both the sending end and the receiving end store a correspondence table of the identification of the switching step and the switching step. Specifically, the correspondence table may be as shown in Table 1 below:

Table 1

切换步进的标识Toggle the logo of the step	切换步进Switch step
0101	1M1M
0202	4M4M
0303	8M8M

As shown in Table 1 above, since the identification of the switching step corresponds to the switching step one-to-one, when the sending end sends the identification of the switching step to the receiving end, the receiving end can search for the above The corresponding relationship table learns the switching step. In such an implementation manner, since the amount of identification data for sending the switching step is only 1 bit or 2 bits, the switching information only occupies a small part of the transmission resources in the foregoing first frame, which is beneficial to the first frame. The frame carries more business information.

Optionally, the switching information may be the aforementioned switching step. In such an implementation manner, the receiving end can directly determine the amount by which the symbol bandwidth needs to be adjusted according to the switching step sent by the sending end. Therefore, compared with the previous implementation manner, the receiving end does not need to perform a table look-up operation, and can directly learn the switching step, which is beneficial to reducing the calculation amount of the receiving end and reducing the calculation load of the receiving end.

Optionally, the switching information may be a second period, where the second period is the duration of transmitting one symbol using the second symbol bandwidth, and the reciprocal of the second period is the second symbol bandwidth. Also, since the size of the first symbol bandwidth is known to the receiving end, the receiving end can calculate the difference between the second symbol bandwidth and the first symbol bandwidth, that is, the switching step. Therefore, there is a corresponding relationship between the second period and the switching step. Compared with the foregoing implementation, this implementation method adds a way to indicate the switching step, which can make the switching information sent by the sending end to the receiving end flexible and diverse.

Optionally, the switching information may include the number of symbols carrying the service information and the number of symbols carrying the redundant information. Since the time required to transmit a frame is known to both the sender and the receiver, when the number of symbols transmitted in this frame is determined, the duration of each symbol can be calculated, that is, the second cycle. Because there is a corresponding relationship between the foregoing second period and the foregoing switching step. Therefore, the sending end can inform the receiving end of the switching step by indicating the number of symbols carrying the service information and the number of symbols carrying the redundant information to the receiving end. In addition, although the receiving end knows the number of symbols carrying service information contained in the first frame, the second frame contains redundant information. When the receiving end learns the number of symbols carrying the service information and the number of symbols carrying the service information After the number of redundant information symbols, the receiving end can demodulate the symbols carrying service information more accurately, and discard the symbols carrying redundancy. It is beneficial to prevent the receiving end from discarding the symbols carrying service information and causing loss of data transmission.

Optionally, the switching information further includes the number of switching times, and the number of switching times is the number of times the transmitting end switches the symbol bandwidth according to the switching step. Therefore, the receiving end can learn whether the symbol bandwidth needs to be switched for several frames after the second frame. It is helpful for the receiving end to prepare for the subsequent handover operation.

When the sending end performs the function of reducing the symbol bandwidth, as shown in FIG. 1E, the sending end 10 includes a receiving module 101 and a sending module 102. Wherein, the receiving module 101 is used to receive the first information of the service and the second information of the service. The service is the service currently transmitted between the sending end and the receiving end. The sending module 102 is configured to send the first information to the receiving end using the first symbol bandwidth, and the first information is located in the first frame. That is, the data transmission between the sending end and the receiving end is in units of frames, and the sending module 102 sends the first information to the receiving end through the first frame. In addition, the sending module 102 is also configured to use the second symbol bandwidth to send the second information to the receiving end. The second information is located in the second frame, that is, the sending module 102 only sends the second information in the second frame.

It should be understood that, in this embodiment, the foregoing first symbol bandwidth is greater than the foregoing second symbol bandwidth.

Wherein, the time length of using the first symbol bandwidth to transmit the first information is the same as the time length of using the second symbol bandwidth to transmit the second information. The number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Because, in the same time, the first frame and the second frame respectively transmit different numbers of symbols. Therefore, the rate at which each symbol in the first frame is transmitted is different from the rate at which each symbol in the second frame is transmitted. Because the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Therefore, the rate at which each symbol in the first frame is transmitted is greater than the rate at which each symbol in the second frame is transmitted. Since both the first frame and the second frame carry service information, that is, the foregoing first information and the foregoing second information are both information of the service, so the sending end is switching the bandwidth of the first symbol to the second symbol. In the process of symbol bandwidth, the transmission of the information of the service is always maintained, so the data message delay will not be increased, and the interruption of service transmission is avoided.

Optionally, the switching information may be an identification of the switching step, and the identification of the switching step is used to indicate a switching step. The details are similar to the foregoing Table 1, and the details are not repeated here.

Optionally, the switching information may be the aforementioned switching step.

Optionally, the switching information may be a second period, the second period corresponding to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth.

Optionally, the switching information may include the number of symbols of the second information.

Optionally, the switching information further includes the number of switching times, and the number of switching times is the number of times the transmitting end switches the symbol bandwidth according to the switching step. Specifically, it is similar to the foregoing, and the details are not repeated here.

The main structure of the receiving end will be introduced below:

When the receiving end performs the function of increasing the symbol bandwidth, as shown in FIG. 1F, the receiving end 11 includes a receiving module 111 and a processing module 112. Wherein, the receiving module 111 is configured to receive service information from the sending end using the first symbol bandwidth, and the service information is located in the first frame. In addition, the receiving module 111 is also configured to use the second symbol bandwidth to receive the service information and redundant information from the sending end. Wherein, the service information and the redundant information are located in the second frame. In addition, the duration of using the first symbol bandwidth to transmit the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.

Wherein, because the time length of using the first symbol bandwidth to transmit the service information is the same as the time length of using the second symbol bandwidth to transmit the service information and the redundant information. Also, because the first frame only carries service information, the second frame also carries redundant information in addition to the service information. Therefore, the sender needs to transmit more information within the time of transmitting the first frame, and therefore, it can be determined that the rate at which the sender transmits the first frame is lower than the rate at which the sender transmits the second frame. Since the sending end carries service information in both the first frame and the second frame of transmission, the service information is information of the same service. Therefore, the sending end is in the process of switching the first symbol bandwidth to the second symbol bandwidth. The transmission of the service information is always maintained in the middle, therefore, the data message delay will not increase, and the interruption of service transmission is avoided.

In addition, the aforementioned processing module 112 is configured to extract the switching information from the aforementioned first frame, and adjust the sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period. Wherein, the aforementioned first frame further includes switching information, and the switching information is used to indicate a switching step, and the switching step is the difference between the second symbol bandwidth and the first symbol bandwidth. Specifically, the switching information includes any one of the following: the identification of the switching step, the identification of the switching step is used to indicate a switching step; or, the switching step; or, the second period, the second period Corresponding to one switching step, the second period is the duration of transmitting one symbol using the second symbol bandwidth; or, the number of symbols carrying the service information and the number of symbols carrying the redundant information. In addition, the switching information also includes the number of switching times, and the number of switching times is the number of times the transmitting end switches the symbol bandwidth according to the switching step. Specifically, it is the same as the switching information when the transmitting end performs the function of increasing the symbol bandwidth in the foregoing, and the details are not repeated here.

Specifically, the receiving module 111 in the receiving end 11 in FIG. 1F may be the second transceiving module 304 in FIG. 3A below, and the processing module 112 may be the second switching controller 301 and the symbol bandwidth in FIG. 3A below. Synchronization ring 302, switching information extraction module 303. Specifically, please refer to the related introduction in Figure 3A below.

When the receiving end performs the function of reducing the symbol bandwidth, as shown in FIG. 1G, the receiving end 11 includes a receiving module 111 and a processing module 112. Wherein, the receiving module 111 is configured to receive the first information of the service from the transmitting end by using the first symbol bandwidth, and the first information is located in the first frame. In addition, the receiving module 111 is further configured to use the second symbol bandwidth to receive second information of the service from the sending end, and the second information is located in the second frame. In addition, the duration of transmitting the first information using the first symbol bandwidth is the same as the duration of transmitting the second information using the second symbol bandwidth, and the number of symbols carrying the first information in the first frame is greater than the second information. The number of symbols carrying the second information in the frame.

Because, in the same time, the first frame and the second frame respectively transmit different numbers of symbols. Therefore, the rate at which each symbol in the first frame is transmitted is different from the rate at which each symbol in the second frame is transmitted. Because the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame. Therefore, the rate at which each symbol in the first frame is transmitted is greater than the rate at which each symbol in the second frame is transmitted. Since both the first frame and the second frame carry service information, that is, the foregoing first information and the foregoing second information are both information of the service, so the sending end is switching the bandwidth of the first symbol to the second symbol. In the process of symbol bandwidth, the transmission of the information of the service is always maintained, so the data message delay will not be increased, and the interruption of service transmission is avoided.

In addition, the aforementioned processing module 112 is configured to extract the switching information from the aforementioned first frame, and adjust the sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period. Wherein, the aforementioned first frame further includes switching information, and the switching information is used to indicate a switching step, and the switching step is the difference between the second symbol bandwidth and the first symbol bandwidth. Specifically, the switching information includes any one of the following: the identification of the switching step, the identification of the switching step is used to indicate a switching step; or, the switching step; or, the second period, the second period Corresponding to one switching step, the second period is the duration of transmitting one symbol using the second symbol bandwidth; or, the number of symbols carrying the second information. In addition, the switching information also includes the number of switching times, and the number of switching times is the number of times the transmitting end switches the symbol bandwidth according to the switching step. Specifically, it is the same as the switching information when the transmitting end performs the function of reducing the symbol bandwidth in the foregoing, and the details are not repeated here.

The main structures of the sending end and the receiving end are introduced above, and the foregoing sending end and the foregoing receiving end are respectively further introduced below:

As shown in FIG. 2A, when the sending end performs the function of increasing the symbol bandwidth, the sending end 20 includes a first switching controller 201, a switching information receiving module 202, a symbol bandwidth adapting module 203, a symbol bandwidth enabling module 204, and The first transceiver module 205. The first switching controller 201 is connected to the switching information receiving module 202 and the symbol bandwidth enabling module 204 respectively, and the symbol bandwidth adapting module 203 is connected to the switching information receiving module 202 and the symbol bandwidth enabling module 204 respectively.

The first switching controller 204 is configured to send switching information to the switching information receiving module 202. Wherein, the switching information is used to instruct to switch the first symbol bandwidth to the second symbol bandwidth. Specifically, the switching information is used to indicate a switching step, and the switching step is the difference between the second symbol bandwidth and the first symbol bandwidth.

Optionally, the switching information may be an identification of the switching step, and the identification of the switching step is used to indicate a switching step. When the sending end sends the identification of the switching step to the receiving end, the receiving end can learn the switching step by looking up the table of correspondence between the identification of the switching step and the switching step inside the receiving end.

Optionally, the switching information may be the aforementioned switching step.

Optionally, the switching information may be a second period, where the second period is the duration of transmitting one symbol using the second symbol bandwidth, and the reciprocal of the second period is the second symbol bandwidth.

Optionally, the switching information may include the number of symbols carrying the service information and the number of symbols carrying the redundant information.

Optionally, the switching information further includes the number of switching times, and the number of switching times is the number of times the transmitting end switches the symbol bandwidth according to the switching step. Specifically, the previous article has been introduced in detail, and will not be repeated here.

It should be understood that there is a correspondence between the aforementioned handover step identification, handover step, second period, and the number of symbols carrying the service information and the number of symbols carrying the redundant information. When the receiving end knows any one of the foregoing When the item is selected, the receiving end can calculate other items. For example, when the bandwidth of 50 MHz is reduced to 30 MHz, the switching step may be 2 MHz, and the number of switching times may be 10 times. When the first handover is performed, that is, when the symbol bandwidth is switched from 50MHz to 48MHz, the second period is 1/48us. It should also be understood that if the number of switching times is multiple times, the step of each switching may be different. Specifically, the switching information includes a variety of switching steps, the number of switching times each switching step corresponds to, and the order in which each switching step is adopted. For example, when the bandwidth of 50MHz is reduced to 30MHz, the switching step is set to 2MHz and 1MHz respectively, and the number of switching times corresponding to 2MHz is set to 5 times, the number of switching times corresponding to 1MHz is 10 times, and the switching sequence is first according to 2MHz Switch 5 times, and then switch 10 times according to 1MHz. Specifically, it can be adjusted according to actual application requirements, and the details will not be repeated here.

It should also be understood that the switching information can be written into the first switching controller 201 when the sending terminal 20 is manufactured, and the switching information can also be imported into the first switching controller 201 through software when the user uses the sending terminal 20. In the controller 201, there is no specific limitation here. The specific form of the switching information in the actual application will be described in detail in the embodiments corresponding to FIG. 2D and FIG. 2E later, and the details will not be repeated here.

In addition, the first switching controller 201 is further configured to send first indication information to the symbol bandwidth enabling module 204, the first indication information is generated according to the foregoing switching information, and the first indication information is used to enable the symbol bandwidth The enabling module 204 indicates the second period, so that the symbol bandwidth enabling module 204 determines the first enabling signal according to the second period.

The handover information receiving module 202 is configured to receive service information from a source (not shown) and the handover information from the first handover controller 201, and use the service information and the handover information to configure the first frame. The frame carries the aforementioned switching information and the aforementioned service information. In addition, the switching information receiving module 202 is also configured to send the first frame to the symbol bandwidth adaptation module 203, so that the symbol bandwidth adaptation module 203 uses the frequency corresponding to the first symbol bandwidth to output the first frame to the first frame. A transceiver module 205.

The first transceiver module 205 is configured to use the first symbol bandwidth to send the first frame to the receiving end. Since the switching information is carried in the first frame, the sending end can notify the receiving end in advance to switch the first symbol bandwidth to the second symbol bandwidth according to the switching information, and because the first frame also carries service information Therefore, the service information can be transmitted while notifying the receiving end of the switching information to ensure uninterrupted service transmission.

The symbol bandwidth enable module 204 is configured to determine the first enable signal according to the first indication information sent by the first switching controller 201, and send the first enable signal to the symbol bandwidth adaptation module 203, the second An enable signal is used to enable the symbol bandwidth adaptation module 203 according to the second period carried in the first indication information. Specifically, the first enable signal may be a continuous pulse wave, and a pulse is generated every second period of time. When a certain pulse of the pulse wave is transmitted to the symbol bandwidth adaptation module 203, the symbol bandwidth The adaptation module 203 can output a symbol. When the pulse wave continues to act on the symbol bandwidth adaptation module 203, the symbol bandwidth adaptation module 203 can output consecutive symbols according to the second period.

The symbol bandwidth adaptation module 203 is configured to configure redundant information at the end of the aforementioned service information to obtain a second frame, and output the second frame under the enable action of the first enable signal. Because, the second frame in this embodiment is composed of multiple consecutive symbols. Therefore, when the pulse wave continues to act on the symbol bandwidth adaptation module 203, the second frame can be output according to the second cycle.

The first transceiver module 205 is configured to use the second symbol bandwidth to send the second frame to the receiving end.

In this embodiment, because the symbol bandwidth adaptation module in the transmitting end can output the second frame according to the frequency corresponding to the second symbol bandwidth under the enablement of the first enable signal, and carry redundant information and services. The second frame of information is sent to the receiving end. Therefore, the sending end can not only adjust the bandwidth for sending the second frame to the second symbol bandwidth, but also ensure the continuity of the service when the second frame is sent using the second symbol bandwidth. get on.

Optionally, the first transceiver module 205 is further configured to receive confirmation information from the receiving end, and the confirmation information is used to indicate that the receiving end has received the handover information. Further, the confirmation information may be used to instruct the receiving end to obtain the handover information from the first frame.

Optionally, the first transceiver module 205 is further configured to receive transmission signal quality information from the receiving end, where the transmission signal quality information is used to instruct the receiving end to use the second symbol bandwidth to receive the signal quality of the second frame. In such an implementation, the sending end may determine whether to continue to adjust the symbol bandwidth according to the quality of the transmission quality information. Specifically, the transmission quality information may be mean square error (MSE) or signal-to-noise ratio (signal-to-noise ratio, SNR), which is not specifically limited here.

Further, the first transceiver module 205 is further configured to send the transmission quality information to the first handover controller 201, so that the first handover controller 201 determines whether to continue to adjust the symbols according to the quality of the transmission quality information. bandwidth. When the transmission quality information satisfies the preset condition, the sending end 20 may perform the operation of switching the symbol bandwidth again. Specifically, it is similar to the foregoing content, and details are not repeated here.

In this embodiment, the sending end 20 may decide whether to continue adjusting the symbol bandwidth according to the quality of the second frame received by the receiving end. Therefore, the sending end 20 can enable the symbol bandwidth to gradually and smoothly switch while ensuring the quality of information transmission, thereby avoiding the unstable symbol bandwidth and affecting the user's service experience.

The main structure of the sending end 20 has been introduced above, and the specific structure of each module inside the sending end 20 will be further introduced in conjunction with the sending end 20 shown in FIG. 2A.

Specifically, the symbol bandwidth adaptation module 203 is configured to adjust the transmission rate of each symbol in a frame, and configure redundant information at the end of the frame to ensure that the transmission time of the first frame and the transmission of the second frame are the same. More specifically, the symbol bandwidth adaptation module 203 may include a first-in-first-out module FIFO and a selector; or, the symbol bandwidth adaptation module 203 may include a random access memory RAM.

In an optional implementation manner, as shown in FIG. 2B, the symbol bandwidth adaptation module 203 includes a first-in first-out module FIFO 2031 and a selector 2032. Among them, the FIFO refers to the sequential execution mode that first enters and executes first. The FIFO 2031 is used to buffer the symbols that make up the first frame and input the first frame to the selector 2032, that is, the symbols in the first frame are input to the selector in the order of entering the FIFO 2031 2032. This allows the FIFO 2031 to leave a gap for the selector 2032 to complete rate adaptation and insert redundant symbols.

In addition, in this embodiment, the symbol bandwidth enabling module 204 is connected to the aforementioned selector 2032. Therefore, the first enable signal generated by the symbol bandwidth enabling module 204 can directly act on the selector 2032. The selector 2032 is configured to configure redundant information at the end of the service information to obtain the second frame under the enabling action of the first enable signal. Since the first enable signal is determined according to the second period, the selector 2032 can output a symbol every time interval corresponding to the second period under the enable action of the first enable signal, At this time, the frequency of the symbol output by the selector 2032 is the second symbol bandwidth. After the selector 2032 outputs the symbol carrying the service information, the selector 2032 will configure multiple redundant symbols at the end of the symbol carrying the service information, that is, at the end of the first frame. Symbol to fill up the extra time due to adjusting the output period of each symbol. It should be understood that the output time of each redundant symbol configured by the selector 2032 is also the duration corresponding to the second period. Specifically, reference may be made to the embodiment corresponding to FIG. 1C, and details are not repeated here.

In this embodiment, because the selector in the symbol bandwidth adaptation module can output the second frame according to the frequency corresponding to the second symbol bandwidth under the enablement of the first enable signal, and the second frame carries redundancy. Therefore, the sending end can adjust the bandwidth for sending the second frame to the second symbol bandwidth. Also, because the second frame output by the selector also carries service information, when the sending end transmits the second frame to the receiving end, the receiving end can not only adjust the bandwidth to the second symbol bandwidth adjustment according to the switching information, but also The service information can also be obtained from the second frame to ensure the continuation of the service. Therefore, not only can the service not be interrupted, but also the symbol bandwidth of the service information transmitted between the sender and the receiver can be adjusted.

In another optional implementation manner, as shown in FIG. 2C, the symbol bandwidth adaptation module 203 includes a random access memory RAM 2033. In this embodiment, the symbol bandwidth enable module 204 is connected to the aforementioned RAM 2033. Therefore, the first enable signal generated by the symbol bandwidth enable module 204 can directly act on the RAM 2033. The RAM 2033 is used to configure a symbol carrying redundant information at the end of a symbol carrying service information to obtain the second frame, and to output the second frame under the enable action of the first enable signal. Specifically, the RAM 2033 is enabled by the first enable information to output one symbol every time interval corresponding to a second period. At this time, the frequency of the output symbol of the RAM 2033 is the second symbol bandwidth. . After the RAM 2033 has outputted the symbols carrying service information, since the RAM 2033 stores redundant symbols inside, the RAM 2033 will configure multiple redundant symbols at the end of the symbols carrying service information, which means that At the end of the symbol of the service information, a symbol carrying redundant information is configured to fill up the excess time due to the adjustment of the output period of each symbol. It should be understood that the output time of each redundant symbol configured by the RAM 2033 is also the duration corresponding to the second period. Specifically, reference may be made to the embodiment corresponding to FIG. 1C, and details are not repeated here. It should also be understood that the RAM 2033 may also repeatedly read the symbols in the first frame as redundant symbols, which is not specifically limited here.

In this embodiment, because the RAM 2033 in the symbol bandwidth adaptation module can output the second frame at the frequency corresponding to the second symbol bandwidth under the enablement of the first enable signal, and the second frame carries redundancy. Therefore, the sending end can adjust the bandwidth for sending the second frame to the second symbol bandwidth. Also, because the second frame output by RAM 2033 also carries service information, when the sender is transmitting the second frame to the receiver, the receiver can not only adjust the symbol bandwidth to the second symbol bandwidth adjustment based on the switching information , The service information can also be obtained from the second frame to ensure the continuation of the service. Therefore, not only can the service not be interrupted, but also the symbol bandwidth of the service information transmitted between the sender and the receiver can be adjusted. In addition, since the RAM 2033 can configure the internally stored redundant symbols at the end of the symbols carrying service information, compared with the embodiment corresponding to FIG. 2B, the internal structure of the symbol bandwidth adaptation module can be simplified.

Further, in combination with the implementation manner proposed in FIG. 2B, the sending end 20 may be further as shown in FIG. 2D or FIG. 2E.

Specifically, the handover information receiving module 202 may respectively use different modulation methods to modulate the handover information and the service information. Further, the handover information can be low-level modulation, which is beneficial for the receiving end to quickly adjust and extract the handover information; the service information can be high-level modulation to ensure the demodulation accuracy of the service information, and reduce the failure of the demodulation of the service information. probability.

In an optional implementation manner, as shown in FIG. 2D, the handover information receiving module 202 in the sending end 20 includes a modulation mapping MAP module 2021 and a framing module 2022. Wherein, the framing module 2022 is connected to the first switching controller 201, so that the framing module 2022 can receive information sent by the first switching controller 201, for example, switching information. Specifically, the MAP module 2021 is configured to modulate the service information into the second modulation information by using the first modulation mode, so as to improve transmission efficiency, so that multiple bits of information can be transmitted within the time length of transmitting one symbol. Specifically, the first modulation method may be quadrature amplitude modulation QAM (for example, 64QAM or 256QAM) or other high-order modulation methods, which are not specifically limited here.

In addition, the framing module 2022 is configured to receive the switching information from the first switching controller 201, and use the second modulation method to modulate the switching information into third modulation information, so as to improve the transmission efficiency, so that the Multiple bits of information can be transmitted within the duration of one symbol. Specifically, the second modulation mode may be BPSK modulation or QPSK modulation, which is not specifically limited here. Since the switching information uses a low-order modulation method instead of a high-order modulation method, the modulation and demodulation of the low-order modulation method is easier than that of the high-order modulation method. Therefore, it is easier for the sending end to change the switching information. Inserting into the first frame also makes it easier for the receiving end to demodulate the switching information from the first frame.

The framing module 2022 is further configured to frame the second modulation information and the third modulation information to obtain the first frame, and send the first frame to the symbol bandwidth adaptation module 203. Wherein, the symbol bandwidth adaptation module 203 can adopt the embodiment shown in FIG. 2B or adopt the embodiment shown in FIG. 2C, which is not specifically limited here.

Specifically, the first frame may be as shown in FIG. 2D-1, and the first frame includes a frame header preamble, third modulation information, and second modulation information. Wherein, the third modulation information is a plurality of symbols obtained by low-order modulation of the switching information, the second modulation information is a plurality of symbols obtained by high-order modulation of the service information, and the frame header preamble is used for Positioning in the frame. It should be noted that the number of symbols that make up the frame header preamble, the number of symbols that make up the third modulation information, and the number of symbols that make up the second modulation information can be adjusted according to specific application scenarios. limited.

More specifically, the second frame obtained by configuring redundant information at the end of the symbol carrying service information by the symbol bandwidth adaptation module 203 may be as shown in FIG. 2D-2. The second frame includes the frame header preamble and the third frame. Modulation information, second modulation information, and redundant information. Wherein, the frame preamble, the third modulation information, and the second modulation information are similar to those in FIG. 2D-1, and the details are not repeated here. The redundant information is a plurality of redundant symbols, and the number of redundant symbols varies due to the size of the switched symbol bandwidth, which is not specifically limited here.

In addition, the switching information receiving module 202 may use the same modulation method for the switching information and the service information. At this time, both the aforementioned service information and the aforementioned switching information adopt high-level modulation. Compared with using two different modulation methods, it is beneficial to carry more bits of information in one frame and is beneficial to increase the amount of transmitted data per frame. In turn, it is beneficial to improve the transmission efficiency.

In an alternative embodiment, as shown in FIG. 2E, the switching information receiving module 202 includes a modulation mapping MAP module 2021 and a framing module 2022. The MAP module 2021 is connected to the first switching controller 201, so that the MAP module 2021 can receive information sent by the first switching controller 201, for example, switching information. Specifically, the MAP module 2021 is configured to receive the switching information from the first switching controller 201, where the switching information has been described in detail in the foregoing, and the details will not be repeated here. In addition, the MAP module 2021 is also used to modulate the switching information and the service information into first modulation information using the first modulation mode. More specifically, the MAP module 2021 can modulate the bits representing the switching information and the bits representing the service information into multiple symbols, so that fewer symbols are used to represent more bits, and more bits can be carried in one frame. More information in order to improve transmission efficiency. Specifically, the first modulation method may be quadrature amplitude modulation QAM (for example, 64QAM or 256QAM) or other high-order modulation methods, which are not specifically limited here.

In addition, the framing module 2022 is configured to frame the aforementioned first modulation information to obtain the first frame, and send the first frame to the symbol bandwidth adaptation module 203. Wherein, the symbol bandwidth adaptation module 203 can adopt the embodiment shown in FIG. 2B or adopt the embodiment shown in FIG. 2C, which is not specifically limited here.

Specifically, the first frame may be as shown in FIG. 2E-1, and the first frame includes byte header enable and first modulation information. Wherein, the first modulation information is a plurality of symbols obtained by high-order modulation of the switching information and service information. The byte header enable is used for payload byte positioning, so that when the receiving end receives the first frame, it can know the specific position where the first modulation information is read. It should be noted that the number of symbols constituting the first modulation information can be adjusted according to specific application scenarios, which is not specifically limited here.

More specifically, the second frame obtained by configuring the redundant information at the end of the first frame by the symbol bandwidth adaptation module 203 may be as shown in FIG. 2E-2. The second frame includes byte header enable, first modulation Information and redundant information. Among them, the byte header enable and the first modulation information are similar to those in FIG. 2E-1, and the details are not repeated here. The redundant information is a plurality of redundant symbols, and the number of redundant symbols varies due to the size of the switched symbol bandwidth, which is not specifically limited here.

In this embodiment, no matter the switching information receiving module 202 adopts the embodiment corresponding to FIG. 2D or the embodiment corresponding to FIG. 2E, the switching information receiving module 202 can receive the switching information and service information for further processing such as modulation. Make up the first frame. It is beneficial to load the switching information and the service information in the first frame accurately and efficiently, and reduce the error probability of the switching information and the service information received by the receiving end.

In addition, it should also be understood that the specific implementation of the handover information receiving module 202 proposed in this embodiment can be combined with the implementation shown in FIG. 2C, that is, the modulation mapping MAP module 2021 and framing in this embodiment The module 2022 can replace the switching information receiving module 202 in FIG. 2C. Specifically, it is similar to the implementation manner corresponding to the foregoing Fig. 2D and Fig. 2E, and details are not repeated here.

Further, in combination with the implementation manner proposed in FIG. 2D, the sending end 20 may be further as shown in FIG. 2F. At this time, the sending end 20 further includes a filtering device 206, and the filtering device 206 is used to adjust the waveform of the signal carrying the second frame. Specifically, the filtering device 206 may be a root raised cosine filter 2061 or a difference filter 2062, which is not specifically limited here. When only the root raised cosine filter 2061 is used as the filtering device 206, the root raised cosine filter 2061 is used to shape the transmission spectrum, receive matched filtering, and reduce the inter-symbol crosstalk ISI. When only the difference filter 2062 is used as the filtering device 206, the difference filter 2062 is used to complete the interpolation of the transmitted symbol frequency to the sampling frequency of a digital to analog converter (DAC) to isolate the image.

In practical applications, in order to ensure that the waveform of the signal carrying the second frame is more conducive to demodulation at the receiving end, the root raised cosine filter 2061 and the difference filter 2062 may be used as the filtering device 206. More specifically, as shown in FIG. 2F, the information carrying the second frame may be filtered by the root raised cosine filter 2061, and then filtered by the difference filter 2062.

In addition, it should also be understood that the specific implementation manner of the filtering device 206 proposed in this implementation manner can be combined with the implementation manner proposed in the foregoing FIG. 2E, and details are not described herein again.

In addition, when the transmitting end performs the function of reducing the symbol bandwidth, the internal structure of the transmitting end is similar to that of FIG. 2A, but there are some differences in the functions of the various modules therein.

The sending end 20 includes a first switching controller 201, a switching information receiving module 202, a symbol bandwidth adapting module 203, a symbol bandwidth enabling module 204, and a first transceiver module 205. The first switching controller 201 is connected to the switching information receiving module 202 and the symbol bandwidth enabling module 204 respectively, and the symbol bandwidth adapting module 203 is connected to the switching information receiving module 202 and the symbol bandwidth enabling module 204 respectively.

Among them, the functions of the first switching controller 201, the switching information receiving module 202, and the symbol bandwidth enabling module 204 are similar to those of the aforementioned transmitting end when the symbol bandwidth is increased. For details, please refer to the relevant description in the foregoing.

The first transceiver module 205 is configured to use the first symbol bandwidth to send a first frame to the receiving end, and the first frame includes the number of symbols that carry the first information of the service.

In addition, the symbol bandwidth adapting module 203 is configured to output the second frame carrying the second information of the service according to the frequency corresponding to the second cycle under the enablement of the enable signal sent by the symbol bandwidth enabling module 204. Wherein, the number of symbols carrying the second information of the service in the second frame is less than the number of symbols carrying the first information of the service in the first frame.

In addition, other functions of the first transceiver module 205 are similar to the foregoing, and the details are not repeated here.

Further, the symbol bandwidth adaptation module 203 is used to adjust the transmission rate of each symbol in a frame. More specifically, the symbol bandwidth adaptation module 203 may include a first-in-first-out module FIFO and a selector; or, the symbol bandwidth adaptation module 203 may include a random access memory RAM.

When the symbol bandwidth adaptation module 203 includes a first-in-first-out module FIFO and a selector, as shown in FIG. 2B, the FIFO 2031 is used to buffer the symbols that make up the first frame and input the first frame to the selection. The device 2032, that is, the symbols in the first frame are input to the selector 2032 in the order in which they enter the FIFO 2031. The selector 2032 outputs the symbol carrying the second information of the service according to the frequency corresponding to the second period of the second symbol bandwidth under the action of the second enable signal generated by the symbol bandwidth enabling module 204. Specifically, please refer to the related description in Figure 2B above, which will not be repeated here.

When the symbol bandwidth adaptation module 203 includes a random access memory RAM, as shown in FIG. 2C, the symbol bandwidth enable module 204 is connected to the aforementioned RAM 2033, and the second enable signal generated by the symbol bandwidth enable module 204 directly Act on the RAM 2033. The RAM 2033 is used to output the second frame according to the frequency corresponding to the second period of the second symbol bandwidth under the action of the second enable signal, that is, to output the symbol carrying the second information of the service. Specifically, please refer to the related description in Figure 2B above, which will not be repeated here.

In addition, the aforementioned switching information receiving module 202 may include a modulation mapping MAP module 2021 and a framing module 2022. Wherein, the function of the modulation mapping MAP module 2021 and the function of the framing module 2022 are similar to the functions in the previous embodiment corresponding to FIG. 2D and FIG. 2E, and the details are not repeated here.

In addition, the sending end 20 further includes a filtering device 206, which is used to adjust the waveform of the signal carrying the second frame. Specifically, the filtering device 206 may be a root raised cosine filter 2061 or a difference filter 2062. Specifically, the functions in the foregoing embodiment corresponding to FIG. 2F are similar, and the details are not repeated here.

The structure of the sending end is introduced above, and the main structure of the receiving end is further introduced below:

As shown in FIG. 3A, the receiving end 30 includes a second switching controller 301, a symbol bandwidth synchronization loop 302, a switching information extraction module 303, and a second transceiver module 304. The second switching controller 301 is connected to the symbol bandwidth synchronization loop 302 and the switching information extraction module 303 respectively, and the symbol bandwidth synchronization loop 302 is connected to the switching information extraction module 303.

Specifically, the second transceiver module 304 is configured to use the first symbol bandwidth to receive a first frame from the sending end, the first frame carries switching information and service information, and the switching information is used to instruct to switch the first symbol bandwidth to The second symbol bandwidth, the switching information includes a second period, and the second period is the duration of transmitting one symbol using the second symbol bandwidth. Specifically, for the introduction of the switching information, reference may be made to the related description in the embodiment corresponding to FIG. 2A, and details are not repeated here.

The switching information extraction module 303 is configured to extract the switching information from the first frame and send the switching information to the second switching controller 301.

The second switching controller 301 is configured to determine second indication information according to the switching information, and send the second indication information to the symbol bandwidth synchronization loop 302, where the second indication information is used to indicate the second period.

The symbol bandwidth synchronization loop 302 is configured to adjust the period to the second period according to the second indication information.

The second transceiver module 304 is further configured to use the second symbol bandwidth to receive a second frame from the transmitting end, where the second frame carries the switching information, the service information, and redundancy information;

The handover information extraction module 303 is also used to extract the service information from the second frame, so that the second transceiver module 304 sends the service information to the sink (not shown).

In this embodiment, because the receiving end can receive the first frame through the second transceiving module 304, and obtain the switching information from the first frame through the switching information extraction module 303 to adjust the first symbol bandwidth to the second symbol bandwidth Therefore, the receiving end can prepare for receiving the frame structure subsequently sent by the sending end using the second symbol bandwidth. In addition, when the sending end sends the second frame to the receiving end, the receiving end can not only directly use the second symbol bandwidth to receive the second frame, but also obtain the service information from the second frame to ensure the continuity of the service. get on. Therefore, the synchronization of the transmission information between the sender and the receiver can be guaranteed.

Optionally, the second switching controller 301 is further configured to instruct the second transceiver module 304 to send confirmation information to the sending end, and the confirmation information is used to indicate that the receiving end 30 has received the switching information. Further, the confirmation information may be used to instruct the receiving end to obtain the handover information from the first frame.

Optionally, the second switching controller 301 is further configured to instruct the second transceiver module 304 to send transmission quality information to the sending end, and the transmission quality information is used to instruct the receiving end 30 to use the second symbol bandwidth to receive the The quality of the second frame, so that the sender determines whether it needs to continue to adjust the symbol bandwidth according to the quality of the transmission quality information. Among them, the transmission quality information may be mean square error MSE or signal-to-noise ratio SNR. For details, please refer to the relevant introduction about transmission quality information in the preceding text, and details are not repeated here.

When the transmission quality information satisfies the preset condition and the sending end performs the operation of switching the symbol bandwidth again, the receiving end 30 will also perform the operation of adjusting the symbol bandwidth. Specifically, it is similar to the foregoing content, and details are not repeated here.

In this embodiment, the sending end can decide whether to continue adjusting the symbol bandwidth according to the quality of the second frame received by the receiving end 30. Therefore, when the sending end determines that it is necessary to continue to adjust the symbol bandwidth, the receiving end 30 cooperates with the sending end to adjust the symbol bandwidth and extract the service information in the third frame structure and the service information in the fourth frame structure. , The symbol bandwidth can be gradually and smoothly switched while ensuring the quality of information transmission, thereby avoiding the instability of the symbol bandwidth and affecting the user's service experience.

The main structure of the receiving terminal 30 has been introduced above, and the specific structure of each module inside the receiving terminal 30 will be further introduced in conjunction with the receiving terminal 30 shown in FIG. 3A.

In an optional implementation manner, as shown in FIG. 3B, the switching signal extraction module 303 includes a demodulation and mapping module 3032 and a deframing module 3031. Wherein, the deframing module 3031 is connected to the second switching controller 301, so that the deframing module 3031 can send information, for example, switching information, to the second switching controller 301. In addition, the symbol bandwidth synchronization ring 302 is connected to the deframing module 3031, so that the deframing module 3031 can receive the information sent by the symbol bandwidth synchronization ring 302, for example, the first frame or the second frame.

In addition, when the deframing module 3031 receives the first frame sent by the symbol bandwidth synchronization loop 302, the deframing module 3031 is configured to deframe the first frame to obtain the third modulation information and the second modulation information. Wherein, the second modulation information is modulated by the service information through the first modulation method, so that the information transmission process can improve the transmission efficiency, and multiple bits of information can be transmitted within the duration of transmitting one symbol. Specifically, the first modulation method may be quadrature amplitude modulation QAM (for example, 64QAM or 256QAM) or other high-order modulation methods, which are not specifically limited here. In addition, the third modulation information is modulated by switching information through a second modulation method, and the second modulation method may be BPSK modulation or QPSK modulation, which is not specifically limited here. In addition, the deframing module 3031 is also used to demodulate the third modulation information into the switching information using a second demodulation method, and send the switching information to the second switching controller 301, so that the second switching The controller 301 can control the symbol bandwidth synchronization loop 302 to adjust the symbol bandwidth according to the switching information. In addition, the DeMAP module 3032 is used to demodulate the second modulation information using the first demodulation method to obtain the service information.

It should be understood that the operation of the handover information extraction module 303 receiving the second frame is similar to the foregoing operation, and the details are not repeated here.

It should also be understood that when the switching information receiving module 202 in the aforementioned sending end 20 adopts the implementation as shown in FIG. 2D, that is, the framing module 2022 in the switching information receiving module 202 and the first switching controller 201 When connecting, the receiving end 30 should adopt the embodiment shown in FIG. 3B.

In another optional implementation manner, as shown in FIG. 3C, the switching signal extraction module 303 includes a demodulation and mapping module 3032 and a deframing module 3031. Wherein, the DeMAP module 3032 is connected to the second switching controller 301, so that the DeMAP module 3032 can send information to the second switching controller 301, for example, switching information. In addition, the symbol bandwidth synchronization ring 302 is connected to the deframing module 3031, so that the deframing module 3031 can receive the information sent by the symbol bandwidth synchronization ring 302, for example, the first frame or the second frame.

In addition, when the deframing module 3031 receives the first frame sent by the symbol bandwidth synchronization loop 302, the deframing module 3031 is configured to deframe the first frame to obtain the first modulation information. Wherein, the first modulation information is obtained by adjusting the switching information and the service information through the first modulation mode. Therefore, the DeMAP module 3032 is used to demodulate the first modulation information using the first demodulation method to obtain the switching information and service information. In addition, the DeMAP module 3032 is also used to send the switching information to the second switching controller 301. Wherein, the first modulation method may be quadrature amplitude modulation QAM (for example, 64QAM or 256QAM) or other high-order modulation methods, which are not specifically limited here.

It should also be understood that when the switching information receiving module 202 in the aforementioned sending end 20 adopts the implementation as shown in FIG. 2E, that is, the MAP module 2021 in the switching information receiving module 202 is connected to the first switching controller 201 At this time, the receiving end 30 should adopt the embodiment shown in FIG. 3C.

In this embodiment, no matter the switching information extraction module 303 adopts the implementation corresponding to FIG. 3B or the implementation corresponding to FIG. 3C, the switching information extraction module 303 extracts switching information and service information from the frame structure sent by the sending end. Adopting the foregoing modulation methods is beneficial to accurately and efficiently load the switching information and the service information in the first frame or the second frame, so as to reduce the error probability of the switching information and the service information received by the receiving end.

Further, in combination with the implementation manner proposed in FIG. 3B, the receiving end 30 may be further shown in FIG. 3D. At this time, the symbol bandwidth synchronization loop 302 in the receiving end 30 includes a symbol bandwidth synchronization module 3023 and a filtering device.

Wherein, the symbol bandwidth synchronization module 3023 is configured to adjust the first symbol bandwidth to the second symbol bandwidth according to the switching information. The symbol bandwidth synchronization module 3023 is also used to compensate the frequency deviation of the transceiver. The filtering device is used to adjust the waveform of the signal carrying the frame structure to be received, so that the phase of the signal output by the filtering device is adjusted according to the period corresponding to the switched symbol bandwidth. The frame structure to be received may include the foregoing first frame or the foregoing second frame, which is not specifically limited here.

Specifically, the filtering device may be a root raised cosine filter 3021 or a difference filter 3022, which is not specifically limited here. Among them, the root raised cosine filter 3021 is used for receiving matched filtering to reduce ISI of inter-symbol interference. The difference filter 3021 is used to complete the decimation from the DAC sampling frequency to the optimal receiving sampling point to avoid aliasing.

In practical applications, for the demodulation efficiency and accuracy of the demodulation at the receiving end, the root raised cosine filter 3021 and the difference filter 3022 can be used in combination as a filtering device.

It should be understood that the aforementioned symbol bandwidth synchronization loop 302 may be a symbol bandwidth closed loop synchronization loop or a symbol bandwidth open loop synchronization loop. The aforementioned symbol bandwidth synchronization loop 302 shown in FIG. 3D is a symbol bandwidth closed loop synchronization loop. At this time, the symbol bandwidth synchronization loop 302 includes a symbol bandwidth synchronization module 3023, a difference filter 3021, and a root raised cosine filter 3022. Wherein, the difference filter 3021 is connected to the root raised cosine filter 3022, the root raised cosine filter 3022 is connected to the symbol bandwidth synchronization module 3023, and the symbol bandwidth synchronization module 3023 is connected to the difference filter 3021. Therefore, a closed loop is formed from the difference filter 3021, to the root raised cosine filter 3022, and then to the symbol bandwidth synchronization module 3023.

In addition, as shown in FIG. 3E, when the symbol bandwidth synchronization loop 302 is a symbol bandwidth open loop synchronization loop, the symbol bandwidth synchronization loop 302 includes a symbol bandwidth synchronization module 3023, a difference filter 3021, and a root raised cosine filter 3022 . Wherein, the difference filter 3021 is connected to the root raised cosine filter 3022. However, the root raised cosine filter 3022 is not connected to the symbol bandwidth synchronization module 3023, but is directly connected to the deframing module 3031, and then the deframing module 3031 is connected to the symbol bandwidth synchronization module 3023. In addition, the symbol bandwidth synchronization module 3023 and the aforementioned difference filter 3021 form a bidirectional connection.

It should be understood that the symbol bandwidth synchronization loop 302 proposed in this embodiment may adopt the symbol bandwidth closed loop synchronization loop shown in FIG. 3D, or the symbol bandwidth open loop synchronization loop shown in FIG. 3E. Make a limit. When the symbol bandwidth open loop synchronization loop is adopted, the specific implementation of the symbol bandwidth open loop synchronization loop can be combined with the implementation manner proposed in FIG. 3C, and the details will not be repeated here.

It should also be understood that in practical applications, due to different application scenarios, the internal structure of the symbol bandwidth closed-loop synchronization loop may be different from the internal structure of the symbol bandwidth closed-loop synchronization loop shown in Figure 3D, and the symbol bandwidth is open loop. The internal structure of the synchronization loop may be different from the internal structure of the symbol bandwidth open-loop synchronization loop shown in FIG. 3E, which is not specifically limited here.

In addition, when the receiving end performs the function of reducing the symbol bandwidth, the internal structure of the receiving end is similar to the aforementioned FIG. 3A,

The receiving end 30 includes a second switching controller 301, a symbol bandwidth synchronization loop 302, a switching information extraction module 303, and a second transceiver module 304. The second switching controller 301 is connected to the symbol bandwidth synchronization loop 302 and the switching information extraction module 303 respectively, and the symbol bandwidth synchronization loop 302 is connected to the switching information extraction module 303. Among them, the functions of the aforementioned modules are similar to those of the receiving end performing the function of increasing the symbol bandwidth in the foregoing, and the details are not repeated here.

The switching signal extraction module 303 includes a demodulation and mapping DeMAP module 3032 and a deframing module 3031. Among them, the function of the DeMAP module 3032 and the function of the deframing module 3031 are similar to the functions in the previous embodiment corresponding to FIG. 3B and FIG. 3C, and the details are not repeated here.

In addition, the receiving end 30 also includes a symbol bandwidth synchronization loop 302, which is used to adjust the frequency control word using switching information to supplement the frequency offset and phase offset between the receiving end and the transmitting end. Specifically, please refer to the related introduction in Figure 3D above, and the details will not be repeated here.

The sending end and the receiving end involved in the embodiment of this application are described in detail above, and the specific process of the bandwidth switching method involved in the embodiment of this application will be introduced below. As shown in FIG. 4, when the bandwidth of the first symbol is less than the bandwidth of the second symbol In the case of symbol bandwidth, the steps performed by the sending end and the receiving end in the bandwidth switching method include:

401. The sending end determines the first frame according to the switching information and the service information.

In this embodiment, during the process of the sending end transmitting service data to the receiving end, that is, during the process of sending service information from the sending end to the receiving end, if the sending end needs to adjust the symbol bandwidth, the sending end needs to control Each module inside the transmitting end adjusts the symbol bandwidth, and notifies the receiving end of the parameters required to adjust the symbol bandwidth.

Specifically, the sending end may determine switching information, where the switching information is used to instruct to switch the first symbol bandwidth to the second symbol bandwidth. More specifically, the switching information includes parameters required by the transmitting end to adjust the symbol bandwidth. The switching information is used to indicate a switching step, and the switching step is the difference between the second symbol bandwidth and the first symbol bandwidth.

Optionally, the switching information may be the aforementioned switching step.

Then, the sending end obtains the first frame by modulating and framing the service information obtained from the source and the aforementioned switching information. For the modulation and framing processing, reference may be made to the related descriptions in the foregoing embodiment corresponding to FIG. 2D and the foregoing FIG. 2E, and the details are not repeated here.

402. The sending end uses the first symbol bandwidth to send the first frame to the receiving end.

In this embodiment, the sending end uses the first symbol bandwidth to send the first frame to the receiving end, so the receiving end may use the first symbol bandwidth to receive the first frame from the sending end. Wherein, the first frame carries the aforementioned switching information and the aforementioned service information.

In this embodiment, since the first frame carries switching information, the sending end can notify the receiving end to receive the switching information by sending the first frame to the receiving end, so that the receiving end is receiving the first frame. Step 403 is executed one frame later.

403. The receiving end obtains the switching information and the service information from the first frame.

In this embodiment, the receiving end will demodulate and deframe the first frame to obtain the switching information and the service information carried in the first frame. Specifically, for the foregoing demodulation and deframing processing, reference may be made to the related description in the foregoing embodiment corresponding to FIG. 3B or the foregoing FIG. 3C, and details are not repeated here.

404. The receiving end sends confirmation information to the sending end.

In this embodiment, step 404 is an optional step.

After the receiving end successfully obtains the switching information from the first frame, the receiving end may send confirmation information to the sending end to indicate to the sending end that the receiving end has successfully obtained the switching information.

405. The receiving end switches the first symbol bandwidth to the second symbol bandwidth according to the switching information.

In this embodiment, when step 404 is performed, step 404 and step 405 have no clear time sequence limitation, and step 404 and step 405 only need to be performed after step 403 described above.

In this embodiment, the receiving end will adjust the symbol bandwidth according to the switching information, specifically, adjust the first symbol bandwidth to the second symbol bandwidth. The receiving end may also send the service information to the sink to ensure continuous transmission of the service information to avoid service interruption.

406. The sending end determines a second frame according to the switching information, the service information, and the redundancy information, and the redundancy information is located at the end of the second frame.

In this embodiment, when step 404 is not performed, the sender can perform step 406 after performing step 402 after waiting for a certain period of time, that is, there is no clear time sequence between step 406 and the aforementioned steps 403 and 405. It only needs to be executed after step 402. Wherein, the operation of the sending end to wait for a certain period of time may be implemented in the manner of a timer, and the specific duration of the timer may be configured according to actual requirements, which is not specifically limited here.

In this embodiment, when step 404 is performed, step 406 will be performed after step 404, and there is no clear time sequence limitation between step 406 and the aforementioned step 405.

In this embodiment, because the sending end has instructed the receiving end to adjust the symbol bandwidth through the switching information carried in the first frame in the foregoing steps. Therefore, the sending end can use the second symbol bandwidth to transmit service information. Specifically, the sending end may determine the second frame according to the switching information, the service information, and the redundancy information, and transmit the service information to the receiving end by sending the second frame to the receiving end. For the implementation manner of the sending end determining the second frame, reference may be made to the related description in the foregoing embodiment corresponding to FIG. 2B or the foregoing FIG. 2C, and details are not repeated here.

407. The sending end uses the second symbol bandwidth to send the second frame to the receiving end.

In this embodiment, after the sending end uses the second symbol bandwidth to send the second frame to the receiving end, since the receiving end has adjusted the first symbol bandwidth to the second symbol bandwidth according to the switching information in the foregoing steps, Therefore, the receiving end may use the second symbol bandwidth to receive the second frame from the sending end.

408. The receiving end obtains the service information from the second frame.

Wherein, the second frame carries the service information and redundant information.

In this embodiment, since the receiving end has adjusted the first symbol bandwidth to the second symbol bandwidth in the foregoing steps, the receiving end can obtain the service information from the second frame and discard the second frame Redundant information in.

409. The receiving end sends transmission quality information to the sending end.

In this embodiment, step 409 is an optional step.

Wherein, the transmission signal quality information is used to instruct the receiving end to use the second symbol bandwidth to receive the signal quality of the second frame. After the sending end receives the transmission quality information sent by the receiving end, the sending end can determine whether to continue to adjust the symbol bandwidth according to the quality of the transmission quality information. For example, the sending end may determine to continue to use the second symbol bandwidth to transmit service information, and the sending end may also determine to loop the foregoing steps 401 to 408 to continue to adjust the symbol bandwidth. In addition, the transmission quality information may be the mean square error MSE or the signal-to-noise ratio SNR, which is similar to the foregoing and will not be repeated here.

In the embodiment of this application, since the first frame sent by the sender to the receiver carries switching information and service information, not only can the receiver be notified to adjust the symbol bandwidth before the sender switches the symbol bandwidth, but the receiver can also be The terminal obtains the service information from the first frame to ensure the continuation of the service. In addition, because the symbol bandwidth adaptation module in the transmitting end can output the second frame according to the frequency corresponding to the second symbol bandwidth under the enablement of the first enable signal, and transfer the second frame that carries redundant information and service information. The frame is sent to the receiving end. Therefore, the sending end can not only adjust the bandwidth for sending the second frame to the second symbol bandwidth, but also ensure the continuation of the service when using the second symbol bandwidth to send the second frame.

In addition, when the bandwidth of the first symbol is greater than the bandwidth of the second symbol, as shown in FIG. 5, the steps performed by the transmitting end and the receiving end in the bandwidth switching method include:

501. The sending end determines the first frame according to the switching information and the first information of the service.

Optionally, the switching information may be the aforementioned switching step.

Optionally, the handover information may include the number of symbols carrying the second information of the service.

502. The sending end uses the first symbol bandwidth to send the first frame to the receiving end.

Wherein, the first frame carries the aforementioned switching information and the aforementioned first information of the service.

In this embodiment, since the first frame carries switching information, the sending end can notify the receiving end to receive the switching information by sending the first frame to the receiving end, so that the receiving end is receiving the first frame. Step 503 is executed one frame later.

503. The receiving end obtains the switching information and the first information of the service from the first frame.

In this embodiment, the receiving end will demodulate and deframe the first frame to obtain the switching information and the first information carried in the first frame. Specifically, for the foregoing demodulation and deframing processing, reference may be made to the related description in the foregoing embodiment corresponding to FIG. 3B or the foregoing FIG. 3C, and details are not repeated here.

504. The receiving end sends confirmation information to the sending end.

In this embodiment, step 504 is an optional step.

Step 504 is similar to the aforementioned step 404, and the details will not be repeated here.

505. The receiving end switches the first symbol bandwidth to the second symbol bandwidth according to the switching information.

In this embodiment, when step 504 is performed, step 504 and step 505 have no clear time sequence limitation, and step 504 and step 505 only need to be performed after step 503 described above.

506. The sending end determines the second frame according to the second information of the service.

In this embodiment, when step 504 is not performed, the sending end can perform step 506 after performing step 502 after waiting for a certain period of time, that is, there is no clear time sequence between step 506 and the aforementioned steps 503 and step 505. It only needs to be executed after step 502. Wherein, the operation of the sending end to wait for a certain period of time may be implemented in the manner of a timer, and the specific duration of the timer may be configured according to actual requirements, which is not specifically limited here.

In this embodiment, when step 504 is performed, step 506 will be performed after step 504, and there is no clear time sequence limitation between step 506 and the aforementioned step 505.

In this embodiment, because the sending end has instructed the receiving end to adjust the symbol bandwidth through the switching information carried in the first frame in the foregoing steps. Therefore, the sending end can use the second symbol bandwidth to transmit the second information of the service. Specifically, the sending end may determine the second frame according to the second information of the service, and transmit the second information of the service to the receiving end by sending the second frame to the receiving end. For the implementation manner of the sending end determining the second frame, reference may be made to the related description in the foregoing embodiment corresponding to FIG. 2B or the foregoing FIG. 2C, and details are not repeated here.

507. The sending end uses the second symbol bandwidth to send the second frame to the receiving end.

Wherein, the second frame contains the second information of the aforementioned service.

508. The receiving end obtains second information of the service from the second frame.

In this embodiment, since the receiving end has adjusted the first symbol bandwidth to the second symbol bandwidth in the foregoing steps, the receiving end can obtain the second information of the service from the second frame.

509. The receiving end sends transmission quality information to the sending end.

In this embodiment, step 509 is an optional step.

Step 509 is similar to the aforementioned step 409, and the details are not repeated here.

In the embodiment of the present application, since the first frame sent by the sender to the receiver carries the switching information and the first information of the service, not only can the receiver be notified to adjust the symbol bandwidth before the sender switches the symbol bandwidth, but also The receiving end is made to obtain the first information of the service from the first frame to ensure the continuation of the service. In addition, the second frame sent by the sending end to the receiving end carries the second information of the service, and the foregoing first information and the foregoing second information are both information of the same service. Therefore, when the second symbol bandwidth is used to transmit the second frame, the continuous operation of the service is ensured.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still compare the previous embodiments. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A sending end, which is characterized in that it comprises:

The receiving module is used to receive business information;

A sending module, configured to send the service information to the receiving end using the first symbol bandwidth, where the service information is located in the first frame;

The sending module is further configured to use the second symbol bandwidth to send the service information and redundant information to the receiving end, the service information and the redundant information are located in a second frame, and the second symbol bandwidth is used. The duration of transmitting the service information in one symbol bandwidth is the same as the duration of transmitting the service information and the redundant information using the second symbol bandwidth.
The sending end according to claim 1, wherein the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and the The difference in the bandwidth of the first symbol.
The sending end according to claim 2, wherein the handover information includes any one of the following:

The identifier of the switching step, the identifier of the switching step is used to indicate a switching step;

Or, the switching step;

Or, a second period, where the second period corresponds to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth;

Or, the number of symbols carrying the service information and the number of symbols carrying the redundant information.
The sending end according to claim 3, wherein the switching information further includes the number of switching times, and the number of switching is the number of times the sending end switches the symbol bandwidth according to the switching step.
The sending end according to any one of claims 1 to 4, wherein the sending end further comprises a processing module;

The processing module is configured to configure the redundant information at the end of the service information to obtain the second frame.
The sending end according to claim 5, wherein the processing module comprises a first-in-first-out module (FIFO) and a selector;

The FIFO is used to buffer the service information and input the service information to the selector;

The selector is configured to configure the redundant information at the end of the service information to obtain the second frame, and output the second frame according to the frequency corresponding to the second period.
The sending end according to claim 5, wherein the processing module comprises a random access memory RAM, the RAM is used to cache the service information, and the redundant information is configured at the end of the service information to obtain The second frame, and output the second frame according to the frequency corresponding to the second period.
A receiving terminal, characterized in that it comprises:

A receiving module, configured to use the first symbol bandwidth to receive service information from the sending end, where the service information is located in the first frame;

The receiving module is further configured to receive the service information and redundant information from the sending end using a second symbol bandwidth, the service information and the redundant information are located in a second frame, and the first symbol is used The duration of the bandwidth for transmitting the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.
The receiving end according to claim 8, wherein the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and the The difference in the bandwidth of the first symbol.
The receiving end according to claim 9, wherein the handover information includes any one of the following:

The identifier of the switching step, the identifier of the switching step is used to indicate a switching step;

Or, the switching step;

Or, a second period, where the second period corresponds to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth;

Or, the number of symbols carrying the service information and the number of symbols carrying the redundant information.
The receiving end according to claim 10, wherein the switching information further includes the number of times of switching, and the number of times of switching is the number of times the transmitting end switches the symbol bandwidth according to the switching step.
The receiving end according to any one of claims 9 to 11, wherein the receiving end comprises a processing module;

The processing module is configured to extract the switching information from the first frame;

The processing module is further configured to adjust a sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period.
A sending end, which is characterized in that it comprises:

The receiving module is used to receive the first information of the service and the second information of the service;

A sending module, configured to send the first information to the receiving end using the first symbol bandwidth, where the first information is located in the first frame;

The sending module is further configured to use a second symbol bandwidth to send the second information to the receiving end, the second information is located in a second frame, and the first symbol bandwidth is used to transmit the first information and the length of time The duration of transmitting the second information using the second symbol bandwidth is the same, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.
The transmitter according to claim 13, wherein the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and the The difference in the bandwidth of the first symbol.
The sending end according to claim 14, wherein the handover information includes any one of the following:

The identifier of the switching step, the identifier of the switching step is used to indicate a switching step;

Or, the switching step;

Or, a second period, where the second period corresponds to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth;

Or, the number of symbols carrying the second information.
The sending end according to claim 15, wherein the switching information further includes the number of switching times, and the number of switching times is the number of times the sending end switches the symbol bandwidth according to the switching step.
A receiving terminal, characterized in that it comprises:

A receiving module, configured to receive first information of a service from a sending end by using a first symbol bandwidth, where the first information is located in a first frame;

The receiving module is further configured to receive second information of the service from the sending end using a second symbol bandwidth, the second information is located in a second frame, and the first symbol bandwidth is used to transmit the first information. The duration of information is the same as the duration of transmitting the second information using the second symbol bandwidth, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame Symbol number.
The receiving end according to claim 17, wherein the first frame further includes switching information, the switching information is used to indicate a switching step, and the switching step is the second symbol bandwidth and the The difference in the bandwidth of the first symbol.
The receiving end according to claim 18, wherein the handover information includes any one of the following:

The identifier of the switching step, the identifier of the switching step is used to indicate a switching step;

Or, the switching step;

Or, a second period, where the second period corresponds to one of the switching steps, and the second period is the duration of transmitting one symbol using the second symbol bandwidth;

Or, the number of symbols carrying the second information.
The receiving end according to claim 19, wherein the switching information further includes the number of switching times, and the number of switching is the number of times the transmitting end switches the symbol bandwidth according to the switching step.
The receiving end according to any one of claims 18 to 20, wherein the receiving end comprises a processing module;

The processing module is configured to extract the switching information from the first frame;

The processing module is further configured to adjust a sampling frequency according to the switching step, and the reciprocal of the sampling frequency is the second period.
A bandwidth switching method is characterized in that it includes:

The sender receives business information;

The sending end uses the first symbol bandwidth to send the service information to the receiving end, where the service information is located in the first frame;

The sending end uses the second symbol bandwidth to send the service information and redundant information to the receiving end, the service information and the redundant information are located in a second frame, and the first symbol bandwidth is used for transmission The duration of the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.
A bandwidth switching method is characterized in that it includes:

The receiving end uses the first symbol bandwidth to receive service information from the sending end, where the service information is located in the first frame;

The receiving end uses the second symbol bandwidth to receive the service information and the redundant information from the transmitting end, the service information and the redundant information are located in a second frame, and the first symbol bandwidth is used for transmission The duration of the service information is the same as the duration of using the second symbol bandwidth to transmit the service information and the redundant information.
A bandwidth switching method is characterized in that it includes:

The sending end receives the first information of the service and the second information of the service;

The sending end uses the first symbol bandwidth to send the first information to the receiving end, where the first information is located in the first frame;

The sending end uses the second symbol bandwidth to send the second information to the receiving end, where the second information is located in a second frame, and the first symbol bandwidth is used to transmit the first information for a duration different from using the second symbol The bandwidth for transmitting the second information has the same duration, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.
A bandwidth switching method is characterized in that it includes:

The receiving end uses the first symbol bandwidth to receive the first information of the service from the transmitting end, where the first information is located in the first frame;

The receiving end uses the second symbol bandwidth to receive the second information of the service from the transmitting end, the second information is located in the second frame, and the time length for transmitting the first information using the first symbol bandwidth is equal to The duration of transmitting the second information using the second symbol bandwidth is the same, and the number of symbols carrying the first information in the first frame is greater than the number of symbols carrying the second information in the second frame.
A communication system, characterized in that, the communication system includes:

The sending end according to claims 1 to 7 and the receiving end according to claims 8 to 12;

or,

The transmitting end according to claims 13 to 16 and the receiving end according to claims 17 to 21.
A computer program product containing instructions, which is characterized in that when it runs on a computer, the computer executes the method according to any one of claims 22 to 25.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 22 to 25.