CN105519063B - A kind of method, apparatus and system for sending, receiving data - Google Patents

Abstract

The present invention discloses a method, device and system for sending and receiving data. In this solution, each sub-carrier uses a channel coding method corresponding to the number of bits supported to be loaded to encode data. To obtain the maximum gain, the data is sent at the maximum transmission rate. Therefore, the defects of serious waste of resources, low gain and low transmission rate in the prior art are solved, and the resource utilization rate, the gain, and the transmission rate are improved. .

Description

A method, device and system for sending and receiving data

technical field

The present invention relates to data transmission technology in the communication field, and in particular, to a method, device and system for sending and receiving data.

Background technique

Due to various reasons, the data stream may have bit errors during transmission, which will cause the receiving end to produce image jumps and discontinuities. In order to solve this problem, a scheme is proposed to process the data stream through channel coding, so that the transmission system has certain error correction and anti-interference ability, which can greatly avoid the occurrence of bit errors in the transmission of the data stream.

The process of channel coding is to add and insert some symbols in the source data stream, so as to achieve the purpose of error judgment and error correction at the receiving end. In a channel with a fixed bandwidth, the total transmission code rate is also fixed. Since channel coding increases the amount of data, the result can only be at the expense of reducing the transmission useful information code rate. The coding efficiency is the number of useful bits divided by the total number of bits. The ratio of the number of bits, different encoding methods, the encoding efficiency is different.

At present, only one coding method is used in the entire available frequency band of a system. Although this method can also avoid the occurrence of bit errors in data stream transmission, for this single coding method, the coding gain is not all the same. In the entire available frequency band, the SNR (Signal to Noise Ratio) of low-frequency sub-carriers is higher, the number of bits that can be carried is larger, and the relative overhead is lower. Therefore, it is possible to Higher gain is obtained, while the SNR of high-frequency sub-carriers is lower, the number of bits that can be carried is smaller, and its relative overhead is larger, therefore, less gain can be obtained, and the transmission rate of data stream is lower, and its gain There is still room for improvement, and there is a waste of resources. This single encoding method makes the transmission rate of the data stream of the whole system low, and there is a waste of resources.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method, apparatus and system for sending and receiving data, so as to solve the problems of serious waste of resources, low gain and low transmission rate in the prior art.

The specific technical solutions provided by the embodiments of the present invention are as follows:

In a first aspect, a method for sending data is provided, including:

Determine the signal-to-noise ratio (SNR) of the subcarriers in the specified frequency band;

determining the number of bits supported by the sub-carrier according to the SNR; and

Using the channel coding mode corresponding to the number of bits to be loaded as the channel coding mode of the subcarrier;

Channel coding is performed on the data sent on the subcarriers by using the channel coding method, and the coded data is sent on the subcarriers.

With reference to the first aspect, in a first possible implementation manner, determining the signal-to-noise ratio (SNR) of subcarriers in a specified frequency band specifically includes:

Send a preset fixed sequence signal to the receiving end on the subcarrier;

The SNR determined according to the difference between the fixed sequence signal and the received signal and sent by the receiving end is received.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner, determining the number of bits supported by the subcarrier to be loaded according to the SNR, specifically including:

Using Shannon's formula to determine the number of bits supported by the subcarrier according to the SNR;

Wherein, the number of bits supported by the subcarrier to be loaded is positively correlated with the SNR.

With reference to the first aspect, in a third possible implementation manner, the channel coding manner corresponding to the number of bits supported to be loaded is used as the channel coding manner of the subcarrier, specifically including:

determining the maximum gain value corresponding to the number of bits supported to be loaded;

The channel coding mode corresponding to the maximum gain value is used as the channel coding mode of the subcarrier.

With reference to the first aspect, in a fourth possible implementation manner, after the channel coding manner corresponding to the number of bits supported to be loaded is used as the channel coding manner of the subcarrier, the method further includes:

Send a signal carrying the channel coding mode information of the subcarrier to the receiving end.

With reference to the first aspect, in a fifth possible implementation manner, after the channel coding manner corresponding to the number of bits supported to be loaded is used as the channel coding manner of the subcarrier, the channel coding manner is used to Before performing channel coding on the data sent on the subcarriers, it also includes:

Determine the memory consumed by channel coding of the sub-carrier using the corresponding channel coding mode;

If the consumed memory is greater than the preset value, the channel coding mode corresponding to the subcarrier is re-determined until the memory consumed by the subcarrier for channel coding using the corresponding channel coding mode is less than the preset value.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, before sending the encoded data on the subcarrier, the method further includes:

A rate matching operation is performed on the encoded data.

In a second aspect, a method for receiving data is provided, comprising:

receiving a signal sent by the transmitting end that carries the channel coding mode information of the subcarriers;

Channel decoding is performed on the data received on the subcarrier using a channel decoding method corresponding to the channel coding method.

With reference to the second aspect, in a first possible implementation manner, before receiving the signal carrying the channel coding mode information of the subcarriers sent by the transmitting end, the method further includes:

receiving a preset fixed sequence signal sent by the transmitting end on the subcarrier;

The signal-to-noise ratio SNR determined according to the difference between the fixed sequence signal and the actual received signal;

The SNR is sent to the transmitting end, so that the transmitting end determines the channel coding mode of the subcarrier according to the SNR.

In a third aspect, a device for sending data is provided, comprising:

a signal-to-noise ratio determination unit, used to determine the signal-to-noise ratio SNR of the subcarriers in the specified frequency band;

a bit number determination unit, configured to determine the number of bits supported by the subcarrier to be loaded according to the SNR;

a channel coding mode determining unit, configured to use the channel coding mode corresponding to the number of bits to be loaded as the channel coding mode of the subcarrier;

A sending unit, configured to perform channel coding on the data sent on the subcarrier by using the channel coding method, and send the coded data on the subcarrier.

With reference to the third aspect, in a first possible implementation manner, the signal-to-noise ratio determining unit is specifically configured to:

Send a preset fixed sequence signal to the receiving end on the subcarrier;

The SNR determined according to the difference between the fixed sequence signal and the received signal and sent by the receiving end is received.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner, the bit number determination unit is specifically used for:

Using Shannon's formula to determine the number of bits supported by the subcarrier according to the SNR;

Wherein, the number of bits supported by the subcarrier to be loaded is positively correlated with the SNR.

With reference to the third aspect, in a third possible implementation manner, the channel coding mode determining unit is specifically configured to:

determining the maximum gain value corresponding to the number of bits supported to be loaded;

The channel coding mode corresponding to the maximum gain value is used as the channel coding mode of the subcarrier.

With reference to the third aspect, in a fourth possible implementation manner, the sending unit is further configured to:

Send a signal carrying the channel coding mode information of the subcarrier to the receiving end.

With reference to the third aspect, in a fifth possible implementation manner, a determination unit is further included to determine the memory consumed by channel coding the sub-carriers using the corresponding channel coding manner;

If the consumed memory is greater than the preset value, the channel coding mode corresponding to the subcarrier is re-determined until the memory consumed by the subcarrier for channel coding using the corresponding channel coding mode is less than the preset value.

With reference to the fifth possible implementation manner of the third aspect, in the sixth possible implementation manner, the sending unit is further configured to:

A rate matching operation is performed on the encoded data.

In a fourth aspect, an apparatus for receiving data is provided, comprising:

a receiving unit, configured to receive the signal carrying the channel coding mode information of the subcarriers sent by the transmitting end;

A decoding unit, configured to perform channel decoding on the data received on the subcarriers by adopting a channel decoding method corresponding to the channel encoding method.

With reference to the fourth aspect, in a first possible implementation manner, an SNR determination unit is further included, and the SNR determination unit is configured to:

receiving a preset fixed sequence signal sent by the transmitting end on the subcarrier;

The signal-to-noise ratio SNR determined according to the difference between the fixed sequence signal and the actual received signal;

The SNR is sent to the transmitting end, so that the transmitting end determines the channel coding mode of the subcarrier according to the SNR.

In a fifth aspect, a data sending system is provided, including:

The apparatus for sending data as described above, and the apparatus for receiving data as described above.

The beneficial effects of the present invention are as follows:

In the prior art, only one coding method is used in the entire available frequency band of a system. Since the SNR of each sub-carrier may be different, the gain may be different, resulting in a low transmission rate and waste of resources when sending data. In the method provided by the embodiment of the present invention, the SNR of the subcarrier in the specified frequency band is determined; the number of bits supported by the subcarrier to be loaded is determined according to the SNR; the channel coding method corresponding to the number of supported bits is used as the channel of the subcarrier. Coding mode: Channel coding is used to channel code the data sent on the subcarriers, and the encoded data is sent on the subcarriers. In this scheme, each subcarrier adopts the channel coding corresponding to the number of bits that can be loaded. Therefore, each sub-carrier can use the maximum transmission rate to transmit data, and obtain the maximum gain. Therefore, it solves the problems of serious waste of resources, low gain and low transmission rate in the prior art. Defects, improve resource utilization, increase gain, and transmission rate.

Description of drawings

1 is a flowchart of a method for sending data in an embodiment of the present invention;

Fig. 2 is an embodiment of sending data in an embodiment of the present invention;

3 is an embodiment of receiving data in an embodiment of the present invention;

4 is a schematic functional structure diagram of an apparatus for sending data in an embodiment of the present invention;

5 is a schematic functional structure diagram of an apparatus for receiving data in an embodiment of the present invention;

FIG. 6 is a schematic diagram of a data transceiver system in an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The techniques described in this paper can be used in various communication systems such as current 2G, 3G communication systems and next generation communication systems such as Global System for Mobile communications (GSM, Global System for Mobile communications), Code Division Multiple Access (CDMA, Code Division Multiple Access) Access) system, Time Division Multiple Access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access Wireless), Frequency Division Multiple Access (FDMA, Frequency Division Multiple Addressing) system, OFDM Orthogonal Frequency-Division Multiple Access (OFDMA) system, Single-Carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and others such communication systems.

In an embodiment of the present invention, a method for sending data is provided, in which: determining the SNR of a subcarrier in a specified frequency band; determining the number of bits supported by the subcarrier to be loaded according to the SNR; As the channel coding mode of the sub-carrier; the channel coding method is used to channel code the data sent on the sub-carrier, and the encoded data is sent on the sub-carrier. In this scheme, each sub-carrier adopts the bit that supports loading The data is encoded by the channel coding method corresponding to the number of sub-carriers. Therefore, each sub-carrier can use the maximum transmission rate to transmit data, and obtain the maximum gain. Therefore, it solves the problems of serious waste of resources, low gain, and low gain in the prior art. The defect of low transmission rate improves resource utilization, increases gain, and transmission rate.

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention provides a method for sending data, and the specific process of the method is as follows:

Step 100: Determine the SNR of the subcarriers in the specified frequency band;

Step 110: Determine the number of bits supported by the subcarrier to be loaded according to the SNR; and

Step 120: Use the channel coding mode corresponding to the number of bits to be loaded as the channel coding mode of the subcarrier;

Step 130: Channel coding is performed on the data sent on the subcarrier by using the channel coding method, and the coded data is sent on the subcarrier.

In this embodiment of the present invention, the subcarrier in step 100 may be one subcarrier or multiple subcarriers, and in the case of multiple subcarriers, the channel coding mode is determined by taking each subcarrier as a unit. At this time, The channel coding mode of each subcarrier may be different, or, multiple subcarriers may be grouped, and each group of subcarriers may be used as a unit to determine the channel coding mode. Each group of subcarriers corresponds to a different channel coding mode. The subcarriers of the group correspond to the same channel coding scheme.

In this embodiment of the present invention, when determining the SNR of the subcarriers in the designated frequency band, the following methods may be used:

Send a preset fixed sequence signal to the receiver on the subcarrier;

Receive the SNR determined by the difference between the fixed sequence signal and the received signal sent by the receiving end.

Of course, if what is determined in step 100 is the SNR of each group of sub-carriers in the specified frequency band, at this time, for any group of sub-carriers, a known fixed training signal is sent at each sub-carrier, and the receiving end is in this sub-carrier. The carrier receives the signal, calculates the difference between the received signal and the known training signal, calculates the SNR according to the difference, calculates the average of all SNRs, and uses the average of the SNRs as the SNR of the group of subcarriers, and calculates the SNR is the prior art, and details are not described here.

In this embodiment of the present invention, there are various ways to determine the number of bits supported by the subcarrier to be loaded according to the SNR. Optionally, the following ways may be adopted:

Determine the number of bits supported by the sub-carrier to be loaded according to the SNR of the sub-carrier using Shannon's formula;

Among them, the number of bits supported by a subcarrier is positively correlated with the SNR of the subcarrier.

In practical applications, positive correlation means that two variables change in the same direction. When one variable changes from large to small or from small to large, the other variable also changes from large to small or from small to large. That is, the tangent slope of its data curve is always greater than zero. Such as height and weight, the longer the height, the heavier the weight. That is, in the case of a positive correlation, one variable changes in the same direction as the other variable changes (both variables become larger or smaller at the same time). Among them, the amount that causes the change is called the independent variable (that is, the amount that changes by itself), and the other variable is called the dependent variable (that is, the amount that changes with the independent variable). In this embodiment of the present invention, the number of bits supported to be loaded by a subcarrier increases as the SNR increases, and decreases as the SNR decreases.

The above is only an embodiment of determining the number of bits supported by any subcarrier according to the corresponding SNR. In practical applications, there are many other implementation manners, which will not be described in detail here.

In the embodiment of the present invention, Shannon's formula is shown as formula one:

B=log2(1+SNR) (Formula 1)

Among them, B is the number of bits to support loading.

In this embodiment of the present invention, there are various channel coding methods, and the optional ones are Reed-Solomon code, convolutional code, Turbo code, TCM (Terllis Coded Modulation, also known as Trellis Code Modulation) code, LDPC (Low Density ParityCheck) code One or any combination of Low Density Parity Check) codes, of course, in practical applications, there are other methods, which will not be described in detail here.

In this embodiment of the present invention, the channel coding mode corresponding to the number of bits to be loaded is used as the channel coding mode of the subcarriers.

Determine the maximum gain value corresponding to the number of bits supported to be loaded;

The channel coding mode corresponding to the maximum gain value is used as the channel coding mode of the subcarrier.

Of course, there are other implementation manners, which will not be described in detail here.

In the embodiment of the present invention, the correspondence between subcarriers, the number of bits supported for loading, gain, and channel coding is shown in Table 1:

Table 1 Correspondence of subcarriers, supported bits, gain, and channel coding

subcarrier Number of bits supported to load channel coding gain Subcarrier 1 8 TCM code 50 Subcarrier 1 8 LDPC code 100 Subcarrier 1 8 Turbo code 150 Subcarrier 2 18 LDPC code 200 Subcarrier 2 18 TCM code 250 Subcarrier 2 18 Turbo code 400 Subcarrier 3 8 LDPC code 700 Subcarrier 3 8 TCM code 250 Subcarrier 3 8 Turbo code 300

As shown in Table 1, the number of bits supported by subcarrier 1 is 8, and the channel encoding corresponding to the maximum gain of 150 is Turbo code. Therefore, subcarrier 1 uses Turbo code to channel code the data to be sent, and encodes the encoded data. Sending; The number of bits that subcarrier 2 supports to load is 18, and the channel coding corresponding to maximum gain 400 is Turbo code, therefore, subcarrier 2 adopts Turbo code to carry out channel coding on the data to be sent, and the coded data is sent; The number of bits supported by subcarrier 3 is 8, and the channel coding corresponding to the maximum gain of 700 is LDPC code. Therefore, subcarrier 3 uses LDPC code to channel code the data to be sent, and sends the encoded data.

In practical applications, since each channel coding method contains different coding lengths, for example, LDPC codes, which include 1/2, 2/3, 5/6 and other coding lengths, where the numerator represents the number of valid bytes and the denominator Represents the total number of bytes, and the number of bytes obtained by subtracting the numerator from the denominator represents the overhead. That is to say, the encoding efficiency of different encoding lengths is different. Therefore, the gain comparison in Table 1 is based on the same encoding efficiency. Below, the gain comparison of different coding methods.

Since the receiving end needs to perform channel coding on the received data sent by the sending end, in this embodiment of the present invention, after the channel coding mode corresponding to the number of bits supported to be loaded is used as the channel coding mode of the subcarrier, the following steps are further included: operate:

A signal carrying channel coding mode information of the subcarrier is sent to the receiving end.

The purpose of the above operations is to enable the receiving end to obtain the channel coding mode adopted by the subcarriers on which the data is received, and then decode the data received on the channel according to the corresponding channel decoding mode.

In practical applications, if the subcarriers all use channel coding corresponding to the maximum gain to perform channel coding on data, the memory consumption may be greater than the preset value, for example, the preset value is the memory resource that can be provided by the device for sending data. In the embodiment, after the channel coding mode corresponding to the number of bits supported to be loaded is used as the channel coding mode of the subcarrier, and before the channel coding mode is used to perform channel coding on the data sent on the subcarrier, the following operations are also included:

Determine the memory consumed by the channel coding of the sub-carriers using the corresponding channel coding method;

If the consumed memory is greater than the preset value, the channel coding mode corresponding to the sub-carrier is re-determined until the memory consumed by the sub-carrier for channel coding using the corresponding channel coding mode is less than the preset value.

Of course, if the consumed memory is less than the preset value, the channel coding method is directly used to perform channel coding on the data sent on the subcarriers, and the channel coding method corresponding to the subcarriers does not need to be re-determined.

For example, there are 3 groups of sub-carriers in the frequency band: sub-carrier 1, sub-carrier 2, sub-carrier 3, sub-carrier 1 adopts channel coding c1 mode 1 (requires memory m1), sub-carrier 2 adopts channel coding c2 mode (needs memory consumption) m2), subcarrier 3 adopts the 2 mode of channel coding c1 (requires memory m3 consumption), and m1+m2+m3 is larger than the memory that can be provided by the device that actually sends the data, then the channel coding mode of the subcarrier needs to be re-determined, for example, Re-determine the channel coding mode of subcarrier 1, and use channel coding c1 mode 2 (memory m4 needs to be consumed). If m4+m2+m3 is less than the memory that can be provided by the device that actually sends the data, at this time, in subcarrier 1, subcarrier 1, subcarrier Carrier 2 and sub-carrier 3 use channel coding c1 2 mode, channel coding c2 mode, and channel coding c1 2 mode to channel code the data to be sent, and send the coded data.

In the transmission process, in order to flexibly grasp the transmission rate of the data, in this embodiment of the present invention, before the encoded data is sent on the group of subcarriers, a rate matching operation (including a puncturing operation or repeating operation) is also performed on the data to be sent. operate). In channel coding, the correlation of codewords is used to detect/correct errors in the transmission process (that is, part of the information is repeated, lost, and the error can still restore the normal sequence). The puncturing technology uses this feature to lose and rearrange some redundant information to adapt to the new transmission rate, and then restore the original information sequence through decoding at the receiving end. The repetition technique is to repeat part of the information to achieve a lower coding rate.

That is to say, before sending the encoded data on the subcarriers, the following operations are also included:

A rate matching operation is performed on the encoded data.

Among them, the rate matching operation is performed on the data, including:

Punch the data or repeat the data.

In this embodiment of the present invention, steps 100 to 130 may be specifically applied in DSL (Digital Subscriber Line, digital subscriber line), for example, in VDSL in DSL, or in ADSL in DSL.

Referring to FIG. 2, an embodiment of the present invention provides a method for receiving data, and the specific process of the method is as follows:

Step 200: Receive a signal carrying channel coding mode information of the subcarriers sent by the transmitting end;

Step 210: Channel decoding is performed on the data received on the subcarriers by using a channel decoding method corresponding to the channel coding method.

In the embodiment of the present invention, before receiving the signal carrying the channel coding mode information of the subcarriers sent by the transmitting end, the following operations are further included:

receiving a preset fixed sequence signal sent by the transmitting end on the subcarrier;

SNR determined according to the difference between the fixed sequence signal and the actual received signal;

The SNR is sent to the transmitting end, so that the transmitting end determines the channel coding mode of the subcarrier according to the SNR.

In order to better understand the embodiments of the present invention, specific application scenarios are given below, and a further detailed description is made for the process of sending data, as shown in FIG. 3 :

Step 300: Determine the SNRs corresponding to the three groups of subcarriers in the frequency band respectively;

Step 310: According to formula 1, respectively determine that the number of bits supported by the three groups of subcarriers to be loaded is 8, 18, and 8;

Among them, the correspondence between the three groups of subcarriers: subcarrier 1, subcarrier 2, and subcarrier 3, respectively, and the number of bits supported for loading, channel coding, and gain are shown in Table 1.

Step 320: Determine according to Table 1 that the channel coding corresponding to the maximum gain of subcarrier 1 is a Turbo code, the channel coding corresponding to the maximum gain of subcarrier 2 is a Turbo code, and the channel coding corresponding to the maximum gain of subcarrier 3 is an LDPC code;

Step 330: Use Turbo code, Turbo code, and LDPC code on subcarrier 1, subcarrier 2, and subcarrier 3, respectively, to perform channel coding on the data to be sent;

Step 340: Perform a puncturing operation on the encoded data, and send the punctured data.

Based on the above technical solution, referring to FIG. 4 , an embodiment of the present invention provides an apparatus 400 for transmitting data. The apparatus 400 includes a signal-to-noise ratio determination unit 40, a bit number determination unit 41, a channel coding method determination unit 42, and a transmission Unit 43, where,

a signal-to-noise ratio determining unit 40, configured to determine the signal-to-noise ratio SNR of the subcarriers in the specified frequency band;

A bit number determination unit 41, configured to determine the number of bits supported by the subcarrier to be loaded according to the SNR;

a channel coding mode determining unit 42, configured to use the channel coding mode corresponding to the number of bits to be loaded as the channel coding mode of the subcarrier;

The sending unit 43 is configured to perform channel coding on the data sent on the subcarriers by using a channel coding method, and send the encoded data on the subcarriers.

Optionally, in this embodiment of the present invention, the signal-to-noise ratio determining unit 40 is specifically configured to:

Send a preset fixed sequence signal to the receiver on the subcarrier;

Receive the SNR determined by the difference between the fixed sequence signal and the received signal sent by the receiving end.

Optionally, in this embodiment of the present invention, the number of bits determining unit 41 is specifically configured to:

Adopt Shannon formula to determine the number of bits supported by subcarrier according to SNR;

Among them, the number of bits loaded by the subcarrier is positively correlated with the SNR.

Optionally, in this embodiment of the present invention, the channel coding mode determining unit 42 is specifically configured to:

Determine the maximum gain value corresponding to the number of bits supported to be loaded;

The channel coding mode corresponding to the maximum gain value is used as the channel coding mode of the subcarrier.

Optionally, in this embodiment of the present invention, a determination unit 44 is further included, and the determination unit 44 is configured to determine the memory consumed by the sub-carriers using the corresponding channel coding mode to perform channel coding;

If the consumed memory is greater than the preset value, the channel coding mode corresponding to the sub-carrier is re-determined until the memory consumed by the sub-carrier for channel coding using the corresponding channel coding mode is less than the preset value.

Further, in this embodiment of the present invention, the sending unit 43 is further configured to:

A rate matching operation is performed on the encoded data.

Based on the above technical solution, referring to FIG. 5 , an embodiment of the present invention provides an apparatus 500 for receiving data. The apparatus 500 includes a receiving unit 50 and a decoding unit 51 , wherein,

a receiving unit 50, configured to receive a signal carrying the channel coding mode information of the subcarriers sent by the transmitting end;

The decoding unit 51 is configured to use a channel decoding method corresponding to the channel coding method to perform channel decoding on the data received on the subcarriers.

Further, in this embodiment of the present invention, the apparatus further includes an SNR determination unit 52, and the SNR determination unit 52 is configured to:

receiving a preset fixed sequence signal sent by the transmitting end on the subcarrier;

The signal-to-noise ratio SNR determined according to the difference between the fixed sequence signal and the actual received signal;

The SNR is sent to the transmitting end, so that the transmitting end determines the channel coding mode of the subcarrier according to the SNR.

Based on the above technical solution, referring to FIG. 6 , an embodiment of the present invention provides a data transceiver system, and the data transceiver system includes:

The apparatus 400 for sending data as shown in FIG. 4 , and the apparatus 500 for receiving data as shown in FIG. 4 .

To sum up, an embodiment of the present invention provides a method for sending data, in which: determining the SNR of a subcarrier in a specified frequency band; determining the number of bits supported by the subcarrier according to the SNR; and corresponding the number of bits supported for loading The channel coding mode of the subcarrier is used as the channel coding mode of the subcarrier; the channel coding mode is used to channel code the data sent on the subcarrier, and the encoded data is sent on the subcarrier. In this scheme, each subcarrier The data is encoded by using the channel coding method corresponding to the number of bits supported to be loaded. Therefore, each sub-carrier can use the maximum transmission rate to transmit data and obtain the maximum gain. Therefore, the serious waste of resources existing in the prior art is solved. , The defects of lower gain and lower transmission rate improve resource utilization, increase gain, and transmission rate.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions in one or more of the flowcharts and/or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions An apparatus implements the functions in one or more of the flowcharts and/or one or more blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions in one or more of the flowcharts and/or one or more blocks of the block diagrams.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, provided that these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (19)

1. a kind of method for sending data characterized by comprising

Determine the Signal to Noise Ratio (SNR) of subcarrier in assigned frequency band；

Determine that the subcarrier supports the bit number of load according to the SNR；And

By the corresponding channel coding method of bit number for supporting load, as the channel coding method of the subcarrier, In, the corresponding channel coding method of at least two subcarriers is different；

Channel coding is carried out to the data that send on the subcarrier using the channel coding method, and by the number after coding It is sent according on the subcarrier.

2. the method as described in claim 1, which is characterized in that determine the Signal to Noise Ratio (SNR) of subcarrier in assigned frequency band, it is specific to wrap It includes:

Preset fixed sequence program signal is sent to receiving end in the subcarrier；

Receive the SNR determined according to the difference between the fixed sequence program signal and reception signal that the receiving end is sent.

3. method according to claim 1 or 2, which is characterized in that determine that the subcarrier supports load according to the SNR Bit number specifically includes:

Determine that the subcarrier supports the bit number of load according to the SNR using shannon formula；

Wherein, the subcarrier supports the bit number of load to be positively correlated with the SNR.

4. the method as described in claim 1, which is characterized in that by the corresponding channel coding side of bit number for supporting load Formula is specifically included as the channel coding method of the subcarrier:

Determine the corresponding maxgain value of bit number for supporting load；

And using the corresponding channel coding method of the maxgain value as the channel coding method of the subcarrier.

5. the method as described in claim 1, which is characterized in that in the corresponding channel coding of bit number for loading the support Mode, after the channel coding method as the subcarrier, further includes:

The signal for carrying the channel coding method information of the subcarrier is sent to receiving end.

6. the method as described in claim 1, which is characterized in that in the corresponding channel coding of bit number for loading the support Mode after the channel coding method as the subcarrier, is sent out using the channel coding method on the subcarrier The data sent carry out before channel coding, further includes:

Determine that the subcarrier carries out the memory of channel coding consumption using corresponding channel coding method；

If the memory of the consumption is greater than preset value, the corresponding channel coding method of the subcarrier is redefined, until institute It states subcarrier and the preset value is less than using the memory that corresponding channel coding method carries out channel coding consumption.

7. method as claimed in claim 6, which is characterized in that before the data after coding are sent on the subcarrier, Further include:

Rate adaptation operating is carried out to the data after the coding.

8. a kind of method for receiving data characterized by comprising

Receive the signal of the channel coding method information for the carrying subcarrier that transmitting terminal is sent；

Using channel decoding process corresponding with the channel coding method, the data arrived in the received over subcarriers are carried out Channel decoding, wherein the corresponding channel coding method of the subcarrier is that the subcarrier supports the bit number of load corresponding Channel coding method.

9. method according to claim 8, which is characterized in that in the channel coding for receiving the carrying subcarrier that transmitting terminal is sent Before the signal of mode information, further includes:

Receive the preset fixed sequence program signal that transmitting terminal is sent in the subcarrier；

The Signal to Noise Ratio (SNR) determined according to the fixed sequence program signal and the practical difference received between signal；

The SNR is sent to the transmitting terminal, so that the transmitting terminal determines the channel of the subcarrier according to the SNR Coding mode.

10. a kind of device for sending data characterized by comprising

Signal-to-noise ratio determination unit, for determining the Signal to Noise Ratio (SNR) of subcarrier in assigned frequency band；

Bit number determination unit, for determining that the subcarrier supports the bit number of load according to the SNR；

Channel coding method determination unit, the corresponding channel coding method of bit number for loading the support, as institute State the channel coding method of subcarrier, wherein the corresponding channel coding method of at least two subcarriers is different；

Transmission unit, for carrying out channel coding to the data sent on the subcarrier using the channel coding method, And the data after coding are sent on the subcarrier.

11. device as claimed in claim 10, which is characterized in that the signal-to-noise ratio determination unit is specifically used for:

Preset fixed sequence program signal is sent to receiving end in the subcarrier；

Receive the SNR determined according to the difference between the fixed sequence program signal and reception signal that the receiving end is sent.

12. device as described in claim 10 or 11, which is characterized in that the bit number determination unit is specifically used for:

Determine that the subcarrier supports the bit number of load according to the SNR using shannon formula；

Wherein, the subcarrier supports the bit number of load to be positively correlated with the SNR.

13. device as claimed in claim 10, which is characterized in that the channel coding method determination unit is specifically used for:

Determine the corresponding maxgain value of bit number for supporting load；

And using the corresponding channel coding method of the maxgain value as the channel coding method of the subcarrier.

14. device as claimed in claim 10, which is characterized in that the transmission unit is also used to:

The signal for carrying the channel coding method information of the subcarrier is sent to receiving end.

15. device as claimed in claim 10, which is characterized in that further include judging unit, the judging unit is for determining The subcarrier carries out the memory of channel coding consumption using corresponding channel coding method；

If the memory of the consumption is greater than preset value, the corresponding channel coding method of the subcarrier is redefined, until institute It states subcarrier and the preset value is less than using the memory that corresponding channel coding method carries out channel coding consumption.

16. device as claimed in claim 15, which is characterized in that the transmission unit is also used to:

Rate adaptation operating is carried out to the data after the coding.

17. a kind of device for receiving data characterized by comprising

Receiving unit, the signal of the channel coding method information of the carrying subcarrier for receiving transmitting terminal transmission；

Decoding unit connects for using channel decoding process corresponding with the channel coding method on the subcarrier The data that receive carry out channel decoding, wherein the corresponding channel coding method of the subcarrier is that the subcarrier supports load The corresponding channel coding method of bit number.

18. device as claimed in claim 17, which is characterized in that further include SNR determination unit, the SNR determination unit is used In:

Receive the preset fixed sequence program signal that transmitting terminal is sent in the subcarrier；

The Signal to Noise Ratio (SNR) determined according to the fixed sequence program signal and the practical difference received between signal；

The SNR is sent to the transmitting terminal, so that the transmitting terminal determines the channel of the subcarrier according to the SNR Coding mode.

19. a kind of data receiving-transmitting system characterized by comprising

The device as described in claim 10 or 11 for sending data, and the dress of the reception data as described in claim 17 or 18 It sets.