CN104782097A - Method and device for calculating quantity of encoded data packets transmitted within broadcast system - Google Patents

Abstract

Embodiments of the present invention provide a method and device for calculating the number of broadcast data packets, which can determine the specific number of encoded data packets without closed-loop feedback, and ensure the success rate of sending data packets without causing Too much waste. The specific implementation method is: by obtaining the first parameter, and obtaining the block error rate according to the first parameter, or obtaining the block error rate according to the second parameter when the preset condition is met, and obtaining the actual block error rate according to the block error rate. Number of encoded packets. The invention is used for calculating the specific sending quantity of broadcast data packets.

Description

TECHNICAL FIELD The present invention relates to the communication field, and in particular, to a method and device for calculating the number of encoded data packets sent in a broadcast system.

Background of the Invention Currently, 3GPP LTE R12 stipulates that in Device To Device (D2D) communication, there is no closed loop feedback (Closed Loop) at the physical layer. This will result in the case where the transmitter uses Fountain Coding (Fountain Coding), because the transmitter cannot obtain the physical layer closed-loop feedback information from the receiver, so the transmitter cannot confirm whether the receiver has correctly received a sufficient number of data packets, Furthermore, the transmitter cannot determine the correct number of encoded data packets to be transmitted and ensure receipt by the receiver. When the number of encoded data packets transmitted by the transmitter is too large, it will cause a waste of communication resources in addition to satisfying the receiver to receive the encoded data packets, and when the transmitted encoded data packets are not enough, the reliability of communication cannot be guaranteed.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and device for calculating the number of encoded data packets sent in a broadcast system, which can determine the specific number of encoded data packets without closed-loop feedback, and ensure that the data packets are sent Under the premise of the success rate, do not cause too much waste. In order to achieve the above purpose, the embodiments of the present invention adopt the following technical solutions: In the first aspect, a method for calculating the number of broadcast data packets is provided, the method includes: estimating the signal-to-noise ratio of the data channel according to the first parameter; The signal-to-noise ratio of the data channel, combined with specific broadcasting system parameters, obtains the actual number of encoded data packets sent. In a first possible implementation manner, with reference to the first aspect, the first parameter includes at least the farthest broadcast distance. In a second possible implementation manner, in combination with the first aspect, the estimating the channel signal-to-noise ratio according to the first parameter includes: acquiring a path loss value corresponding to the data channel according to the first parameter; The path loss value corresponding to the channel obtains the signal-to-noise ratio of the current data channel. In a third possible implementation manner, in combination with the first aspect, the obtaining the actual number of encoded data packets sent according to the data channel signal-to-noise ratio in combination with specific broadcast parameters specifically includes: Noise ratio, obtaining a block error rate corresponding to the channel signal-to-noise ratio; obtaining the actual number of encoded data packets sent according to the block error rate and the specific broadcast system parameters.

In a second aspect, a method for calculating the number of encoded data packets sent in a broadcast system is provided, the method comprising: when a preset condition is met, feeding back a second parameter to a transmitter; the transmitter according to the received a second parameter, determining a data channel signal-to-noise ratio corresponding to the second parameter, and determining a block error rate corresponding to the data channel signal-to-noise ratio; the transmitter combines specific broadcast parameters according to the block error rate Determine the actual number of encoded packets. In a first possible implementation manner, in combination with the second aspect, the second parameter includes at least a system reference or a signal-to-noise ratio corresponding to a synchronization signal.

In a second possible implementation manner, in combination with the second aspect, the meeting the preset condition specifically includes: when the second parameter is lower than a preset threshold, feeding back the second parameter to the transmitter. In a third possible implementation manner, in combination with the second aspect, the transmitter determines the signal-to-noise ratio of the data channel corresponding to the second parameter according to the received second parameter, and determines The block error rate corresponding to the data channel signal-to-noise ratio specifically includes: the transmitter selects a minimum value among the received second parameters, and obtains the channel signal-to-noise ratio corresponding to the minimum value, and obtains the The block error rate corresponding to the channel signal-to-noise ratio.

In a third aspect, a calculation device for the number of broadcast data packets is provided, including: a signal-to-noise ratio calculation unit, configured to estimate a data channel signal-to-noise ratio according to a first parameter; a number determination unit, configured to calculate a data channel signal-to-noise ratio based on the data channel , combined with specific broadcast system parameters, the actual number of encoded data packets sent is obtained.

In a first possible implementation manner, with reference to the third aspect, the first parameter includes at least the farthest broadcast distance.

In a second possible implementation manner, in combination with the third aspect, the signal-to-noise ratio calculation unit includes: a path loss calculation subunit, configured to acquire a path loss value corresponding to the data channel according to the first parameter; The signal-to-noise ratio calculation subunit is configured to obtain the current signal-to-noise ratio of the data channel according to the path loss value corresponding to the data channel.

In a third possible implementation manner, the number determination unit specifically includes: a bit error rate calculation subunit, configured to obtain the block error bit corresponding to the data channel signal-to-noise ratio according to the data channel signal-to-noise ratio Rate;

The data packet determination subunit is configured to obtain the actual number of encoded data packets to be sent according to the block error rate and the specific broadcast system parameters. In a fourth aspect, a device for calculating the number of encoded data packets sent in a broadcasting system is provided, the device comprising: a feedback unit configured to feed back a second parameter to a transmitter when a preset condition is met; a bit error rate determination unit , for the transmitter to determine, according to the received second parameter, a data channel signal-to-noise ratio corresponding to the second parameter, and determine a block error rate corresponding to the data channel signal-to-noise ratio; The number determination unit is used for the transmitter to determine the actual number of encoded data packets according to the block error rate and specific broadcast parameters. In a first possible implementation manner, with reference to the fourth aspect, the second parameter includes at least a system reference or a signal-to-noise ratio corresponding to a synchronization signal.

In a second possible implementation manner, with reference to the fourth aspect, the meeting the preset condition specifically includes: when the second parameter is lower than a preset threshold, feeding back the second parameter to the transmitter. In a third possible implementation manner, in combination with the fourth aspect, the bit error rate determining unit is specifically configured to: the transmitter selects a minimum value among the received second parameters, and acquires the minimum value A corresponding channel signal-to-noise ratio, and obtain a block bit error rate corresponding to the channel signal-to-noise ratio. In a fifth aspect, there is provided a device for calculating the number of encoded data packets sent in a broadcast system, the device comprising: a first processor, configured to estimate a channel signal-to-noise ratio according to a first parameter; the first processor, further It is used to obtain the actual number of encoded data packets sent according to the signal-to-noise ratio of the data channel and in combination with specific broadcast system parameters. In a first possible implementation manner, with reference to the fifth aspect, the first parameter includes at least the farthest broadcast distance.

In a second possible implementation manner, with reference to the fifth aspect, the first processor is specifically configured to:

Acquire a path loss value corresponding to the channel according to the first parameter; and acquire a signal-to-noise ratio of a current data channel according to the path loss value corresponding to the channel. In a third possible implementation manner, in combination with the fifth aspect, the first processor is further specifically configured to: acquire a block error rate corresponding to the channel signal-to-noise ratio according to the data channel signal-to-noise ratio; According to the block error rate and the specific broadcast system parameters, the actual number of encoded data packets sent is obtained. In a sixth aspect, there is provided a device for calculating the number of encoded data packets sent in a broadcast system, the device comprising: a transmitter, configured to feed back a second parameter to the transmitter when a preset condition is met; a second processor, being used for the transmitter to determine a data channel signal-to-noise ratio corresponding to the second parameter according to the received second parameter, and determine a block error rate corresponding to the data channel signal-to-noise ratio; the second The processor is further used for the transmitter to determine the actual number of encoded data packets according to the block error rate and specific broadcast parameters. In a first possible implementation manner, with reference to the sixth aspect, the second parameter includes at least a signal-to-noise ratio corresponding to a system reference or a synchronization signal.

In a second possible implementation manner, the preset condition satisfied by the transmitter includes: when the second parameter is lower than a preset threshold, feeding back the second parameter to the transmitter. In a third possible implementation manner, the second processor is specifically configured to: the transmitter selects a minimum value among the received second parameters, and acquires a channel signal-to-noise ratio corresponding to the minimum value , and acquire the block bit error rate corresponding to the data channel signal-to-noise ratio. In the method and device for calculating the number of broadcast data packets provided by the embodiments of the present invention, the first parameter is obtained, and the block bit error rate is obtained according to the first parameter, or obtained according to the second parameter when the preset condition is met. block error rate, and obtain the actual number of encoded data packets sent according to the block error rate; thus, in the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, while ensuring the success rate of data packet transmission Under the premise, do not cause too much waste.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art, and it is obvious that Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without any creative work. FIG. 1 is a schematic diagram of a method for calculating the number of broadcast data packets provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of another method for calculating the number of broadcast data packets provided by an embodiment of the present invention;

FIG. 3 is a detailed schematic diagram of a method for calculating the number of broadcast data packets provided by an embodiment of the present invention;

FIG. 4 is a detailed schematic diagram of a method for calculating the number of broadcast data packets provided by an embodiment of the present invention;

FIG. 5 is a detailed schematic diagram of another method for calculating the number of broadcast data packets provided by an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a calculation device for the number of broadcast data packets provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a calculation device for broadcasting the number of data packets provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a calculation device for broadcasting the number of data packets provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a computing device for broadcasting the number of data packets provided by an embodiment of the present invention;

Figure 10 is a schematic structural diagram of a calculation device for the number of broadcast data packets provided by an embodiment of the present invention; Figure 11 is a schematic structural diagram of a calculation device for the number of broadcast data packets provided by an embodiment of the present invention.

Detailed ways The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention. An embodiment of the present invention provides a method for calculating the number of broadcast data packets, as shown in FIG. 1, the method includes:

101. Estimate the channel signal-to-noise ratio according to the first parameter;

102. According to the channel signal-to-noise ratio and in combination with specific broadcast system parameters, obtain the actual number of encoded data packets to be sent. A method for calculating the number of broadcast data packets provided by an embodiment of the present invention obtains the first parameter, obtains the block error rate according to the first parameter, and then obtains the actual number of encoded data packets sent according to the block error rate ; Therefore, in the absence of closed-loop feedback, the number of specific encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. Compared with the previous method, the embodiment of the present invention also provides another method for calculating the number of broadcast data packets, as shown in FIG. 2, the method includes:

201. When the preset condition is met, feed back the second parameter to the transmitter;

202. The transmitter determines a channel signal-to-noise ratio corresponding to the second parameter according to the received second parameter, and determines a block error rate corresponding to the channel signal-to-noise ratio;

203. The transmitter determines the actual number of encoded data packets to be sent according to the block error rate and in combination with specific broadcast parameters. In a method for calculating the number of broadcast data packets provided by an embodiment of the present invention, when the preset condition is met, the transmitter feeds back the second parameter, and the transmitter determines the second parameter according to the received second parameter. a channel signal-to-noise ratio corresponding to the second parameter, and determining a block error rate corresponding to the channel signal-to-noise ratio, and the transmitter determines the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters; thereby being able In the absence of closed-loop feedback, still The specific number of encoded data packets can be determined, and under the premise of ensuring the success rate of sending data packets, excessive waste will not be caused.

In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present invention, another method for generating data provided by the embodiments of the present invention will be described in detail below through specific examples. The embodiment of the present invention also provides a detailed calculation method for the number of broadcast data packets, as shown in the figure

3, the method specifically includes:

301. Estimate a channel signal-to-noise ratio according to a first parameter.

302. Obtain the actual number of encoded data packets sent according to the channel signal-to-noise ratio and in combination with specific broadcast parameters.

Wherein, as shown in FIG. 3, step 301 specifically includes:

301 1. Acquire a path loss value corresponding to the channel according to the first parameter;

3012. Acquire the signal-to-noise ratio of the current data channel according to the path loss value corresponding to the channel. In this embodiment, the first parameter refers to the farthest broadcast distance, that is, the distance where the transmitter needs to cover the farthest receiver. Of course, the first parameter can also be expressed in other ways.

The path loss value here, that is, Path Loss ( PL ), is the loss value caused by the transmission environment of electromagnetic waves.

Correspondingly, as shown in FIG. 4, step 302 specifically includes:

3021. According to the signal-to-noise ratio of the data channel, obtain the block bit error rate corresponding to the channel signal-to-noise ratio;

3022. Obtain the actual number of encoded data packets sent according to the block error rate and the specific broadcast system parameters.

The block error rate here is Block Error Ratio ( BLER ), which refers to the ratio of the number of error data blocks to the total number of data blocks during the communication data transmission process. The higher the bit error rate, it indicates that the transmitted data has not been received normally. more. The specific broadcast parameters refer to: the channel type used for the current transmission of communication data, the signal modulation method used by the physical layer, and the specific encoding type, etc. These parameters are all selected according to the actual communication situation. The specific process of the method will be described below through an example. First, before sending a specific communication data packet, the transmitter obtains the path loss of the current communication environment according to the specific parameters of the current communication environment. For example: the farthest target distance of the current communication is expected to be 2.4 kilometers, the frequency of the carrier frequency band is 2GHz, the bandwidth of the communication system is 10MHz, and the maximum transmission power of the transmitter is lOdBm. Based on the above parameters, the formula for calculating the path loss is:

^PL = 32.45 + ^{20 ΗΆΜΗζ} )) + ²⁰ lg d(km) + Δ, in this formula, _PL is the abbreviation of path loss, 32.45 is the classic parameter value obtained under a large number of simulation experiments, /( ^{M fe} ) is the carrier frequency in the communication environment, the unit is MHz, it refers to the expected target distance of this communication, the unit is km, Δ is pre-set by the transmitter and receiver before communication, for The calculated compensation value in this communication environment. When the value of △ is 4, bring the above data into the formula, so that:

PL = 32.45 + 20 log f(MHz) + 20 log d(Km) + Δ = 32.45 + 66 + 7.6 + 4 « 1 lOtffi That is, the path loss value in this communication environment is 1 10dB. Secondly, after the path loss is determined, the signal-to-noise ratio of the current channel is obtained according to the obtained path loss value. The specific calculation formula is: 57W? = P - ^ - (-174 + 101g(/Offfe))), where PL is the path loss calculated in the previous step, where /(mm) is the bandwidth value, and the unit is Hz. P in the formula is the transmitting power of the transmitter, and the unit is dBm.

Substituting the above data, we can get "\« ₌ 10 -110 _ (-174 ₊ 1(^(10 * 10 ⁶ ))) = 4^. Thirdly, according to the corresponding relationship between the signal-to-noise ratio and the block bit error rate obtained through a large amount of data simulation results, the corresponding block bit error rate is obtained when the current signal-to-noise ratio is 4dB. For example: the EVA channel is currently used, and the physical layer uses QPSK modulation and a 1/3 Turbo coding method, and the obtained BLER is 10%. Finally, according to the obtained current block bit error rate and the redundancy of sending codes, the actual number of coded packets under this condition is obtained.

Assuming that the currently used Fountain Coding needs to ensure that the decoding failure rate ^ corresponds to a redundancy of 5%, then the actual number of encoded data packets of the final transmitter can be calculated based on 1-10%. Where K is the number of data packets originally input by the transmitter, 5% is the current redundancy of the transmitter under the premise of ensuring the decoding failure rate, and 10% is the block error rate obtained before. W = *l.n obtained from the above data is the final number of encoded packets. In the method for calculating the number of encoded data packets sent in a broadcast system provided by an embodiment of the present invention, the first parameter is obtained, and the block bit error rate is obtained according to the first parameter, and then the actual encoded data is obtained according to the block bit error rate The number of packets; thus, in the absence of closed-loop feedback, the number of specific encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. The embodiment of the present invention also provides a method for calculating the number of broadcast data packets, as shown in FIG. 5, the method includes:

401. When the preset condition is met, feed back the second parameter to the transmitter;

402. The transmitter determines a data channel signal-to-noise ratio corresponding to the second parameter according to the received second parameter, and determines a block error rate corresponding to the data channel signal-to-noise ratio;

403. The transmitter determines the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters. Wherein, the second parameter includes at least a signal-to-noise ratio corresponding to a system reference or a synchronization signal. Satisfying the preset condition specifically includes: when the second parameter is lower than a preset threshold, feeding back the second parameter to the transmitter. Step 402 specifically includes:

4021. The transmitter selects a minimum value among the received second parameters, and acquires The channel signal-to-noise ratio corresponding to the minimum value is based on the block error rate corresponding to the channel signal-to-noise ratio. In this embodiment, the second parameter is Reference Signal Received Quality (Reference Signal Received Quality, RSRQ), and of course, the second parameter may also be expressed in other manners. The RSRQ here is the RSRQ for sending the received Discover signal to the Cluster Header by the user equipment during the Discover stage of communication establishment. The specific process of the method will be described below through an example. First, when the preset condition is satisfied, the reference signal receiving quality RSRQ is fed back to the transmitter. Specifically, in the Discover phase of communication establishment, each D2D user equipment will receive the Discover signal, and after receiving it, will feed back the RSRQ of the received Discover signal to the cluster head CH to which the user equipment belongs, and the cluster head CH will send each user equipment The RSRQ fed back by the device is sent to the transmitter. It is worth mentioning that, in order to reduce resource occupation to a certain extent, each user equipment can also set a threshold for itself, and only when the RSRQ of the Discover signal received is lower than the set threshold, it sends CH Feedback. Secondly, after receiving the fed back RSRQ, the receiver determines the signal-to-noise ratio of the channel used by the transmitter according to the received RSRQ, and determines the corresponding block error rate according to the signal-to-noise ratio.

Specifically, the signal-to-noise ratio and RSRQ have the following corresponding relationship, SNR = RSI^+ , which refers to the signal-to-noise ratio, refers to the minimum value of the received RSRQ, and Δ is the difference between the RS signal and the data channel A compensation value corresponding to the difference. For example, when the EVA channel is used, QPSK modulation and 1/3 Turbo coding are used, if the ^NM is 3dB and the value of △ is 0, it can be obtained that the value of "\" at this time is 3dB, According to relevant data obtained from a large number of simulation experiments, it can be obtained that when W is 3dB, the corresponding block bit error rate is 20%. When the specific transmission environment is different, just bring different △ values into the above formula. After obtaining the corresponding «\«, follow the same method to obtain the corresponding block error rate. Finally, according to the obtained current block bit error rate and the redundancy of sending codes, the actual number of coded packets under this condition is obtained.

Assuming that the currently used Fountain Coding needs to ensure that the decoding failure probability is ^ιο_1ΰ and the corresponding redundancy is 5%, then the actual number of coded data packets of the final transmitter can be calculated according to ^ι_2ο %. Where Κ is the number of data packets originally input by the transmitter, 5% is the current redundancy of the transmitter under the premise of ensuring the decoding failure probability, and 20% is the block error rate obtained before. W = *1J1 obtained from the above data is the final number of encoded packets. In a method for calculating the number of broadcast data packets provided by an embodiment of the present invention, when the preset condition is met, the transmitter feeds back the second parameter, and the transmitter determines the second parameter according to the received second parameter. A data channel signal-to-noise ratio corresponding to the second parameter, and determining a block error rate corresponding to the data channel signal-to-noise ratio, and the transmitter determines the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters; Therefore, in the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. The embodiment of the present invention provides a calculation device 5 for the number of broadcast data packets. As shown in FIG. 52. It is used to obtain the actual number of encoded data packets to be sent according to the signal-to-noise ratio of the data channel and in combination with specific broadcast system parameters. The first parameter includes at least the farthest broadcast distance. Wherein, as shown in FIG. 7, the signal-to-noise ratio calculation unit 51 includes: a path loss calculation subunit 511, configured to obtain a path loss value corresponding to the data channel according to the data channel signal-to-noise ratio; a signal-to-noise ratio calculation subunit The unit 512 is configured to acquire the current signal-to-noise ratio of the data channel according to the path loss value corresponding to the data channel. Similarly, as shown in FIG. 8, the number determination unit 52 specifically includes: a bit error rate calculation subunit 521, configured to obtain the block bit error rate corresponding to the data channel signal-to-noise ratio according to the data channel signal-to-noise ratio The data packet determination subunit 522 is configured to obtain the actual number of encoded data packets sent according to the block error rate and the specific broadcast parameters. A calculation device for the number of broadcast data packets provided in an embodiment of the present invention obtains the first parameter, and obtains a block error rate according to the first parameter, and then obtains the actual number of encoded data packets according to the block error rate; thus In the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. The embodiment of the present invention also provides a computing device 6 for the number of encoded data packets sent in a broadcasting system. As shown in FIG. 9, the device 6 includes: a feedback unit 61, configured to feed back to the transmitter The second parameter: a bit error rate determining unit 62, configured for the transmitter to determine the signal-to-noise ratio of the data channel corresponding to the second parameter according to the received second parameter, and obtain the signal-to-noise ratio corresponding to the data channel The block error rate; the number determining unit 63, configured for the transmitter to determine the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters. The second parameter includes at least a signal-to-noise ratio corresponding to a system reference or a synchronization signal. Wherein, the preset condition that the feedback unit 61 needs to meet specifically includes: when the second parameter is lower than a preset threshold, feeding back the second parameter to the transmitter. The bit error rate determining unit 62 is specifically configured to: the transmitter selects a minimum value among the received second parameters, and acquires a channel signal-to-noise ratio corresponding to the minimum value, and acquires a channel signal-to-noise ratio corresponding to the channel signal-to-noise ratio Block error rate. A calculation device for the number of broadcast data packets provided by an embodiment of the present invention feeds back a second parameter to a transmitter when a preset condition is met, and the transmitter determines the A channel signal-to-noise ratio corresponding to the second parameter, and acquiring a block error rate corresponding to the channel signal-to-noise ratio, and the transmitter determines the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters; thereby being able In the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. The embodiment of the present invention also provides a calculation device 7 for transmitting the number of encoded data packets in a broadcasting system. As shown in FIG. 10, the device 7 includes: a bus 71; The processor 74 and the transmitter 75, wherein the memory 72 is used to store relevant instructions, and the processor 73 executes the relevant instructions for estimating the signal-to-noise ratio of the data channel according to the first parameter; the processor 73 executes the relevant instructions and is also used for The channel signal-to-noise ratio, combined with specific broadcasting system parameters, is used to obtain the actual number of encoded data packets sent. In this embodiment of the present invention, optionally, the processor executes related instructions for estimating the signal-to-noise ratio of the data channel according to a first parameter, where the first parameter includes at least the farthest broadcast distance. In the embodiment of the present invention, optionally, the processor executing related instructions to estimate the signal-to-noise ratio of the data channel according to the first parameter specifically includes: acquiring a path loss value corresponding to the data channel according to the first parameter; Acquire the current signal-to-noise ratio of the data channel according to the path loss value corresponding to the data channel. In the embodiment of the present invention, optionally, the processor executes related instructions to obtain the actual number of encoded data packets sent according to the signal-to-noise ratio of the data channel in combination with specific broadcast system parameters, which specifically includes: said according to said A data channel signal-to-noise ratio, obtaining a block error rate corresponding to the data channel signal-to-noise ratio; obtaining the actual number of encoded data packets sent according to the block error rate and the specific broadcast system parameters. Therefore, an apparatus for calculating the number of broadcast data packets provided in an embodiment of the present invention acquires the first parameter, obtains the block error rate according to the first parameter, and then obtains the actual number of encoded data packets according to the block error rate ; Therefore, in the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. The embodiment of the present invention also provides a calculation device 8 for transmitting the number of encoded data packets in a broadcasting system. As shown in FIG. 11, the device 8 includes: a bus 81; and a memory 82 connected to the bus 81, a processor 83, The receiver 84 and the transmitter 85, wherein the memory 82 is used to store related instructions, and the processor 83 executes the related instructions to feed back the second parameter to the transmitter when the preset condition is met; the processor 83 executes the related instructions for determining, by the transmitter, a data channel signal-to-noise ratio corresponding to the second parameter according to the received second parameter, and determining a block error rate corresponding to the data channel signal-to-noise ratio; the processor 83 performs correlation The instruction is used for the transmitter to determine the actual number of encoded data packets according to the block error rate and specific broadcast parameters. In the embodiment of the present invention, optionally, the processor 83 executes related instructions for the transmitter to include at least the signal-to-noise ratio corresponding to the system reference or the synchronization signal according to the received second parameter among the second parameters. . In this embodiment of the present invention, optionally, the processor 83 executes related instructions for the transmitter to specifically include: When the threshold is set, feed back the second parameter to the transmitter. The processor 83 executes related instructions for the transmitter to determine the data channel signal-to-noise ratio corresponding to the second parameter according to the received second parameter, and determine the block error rate corresponding to the data channel signal-to-noise ratio The code rate specifically includes: the transmitter selects a minimum value among the received second parameters, and obtains a channel signal-to-noise ratio corresponding to the minimum value, and obtains a block error rate corresponding to the channel signal-to-noise ratio. An apparatus for calculating the number of broadcast data packets provided by an embodiment of the present invention feeds back a second parameter to the transmitter when a preset condition is met, and the transmitter determines the A channel signal-to-noise ratio corresponding to the second parameter, and acquiring a block error rate corresponding to the channel signal-to-noise ratio, and the transmitter determines the actual number of encoded data packets according to the block error rate and in combination with specific broadcast parameters; thereby being able In the absence of closed-loop feedback, the specific number of encoded data packets can still be determined, and on the premise of ensuring the success rate of sending data packets, excessive waste will not be caused. Those skilled in the art can clearly understand that for the convenience and brevity 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. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be realized in the form of hardware, or may be realized in the form of hardware plus software functional units. Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes. The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any skilled person in the technical field can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (22)

1. Claims

   1st, the computational methods of the coded data packet quantity sent in a kind of broadcast system, it is characterised in that methods described includes：

   According to the first parameter estimation data channel signal to noise ratio；

   According to the data channel signal to noise ratio, with reference to specific broadcast system parameter, the actual coding number of data packets sent.

   2nd, according to the method described in claim 1, it is characterised in that first parameter at least includes farthest broadcast distances.

   3rd, according to the method described in claim 1, it is characterised in that described to be included according to the first parameter estimation channel SNRs：

   According to first parameter, the corresponding path loss values of the data channel are obtained；According to the corresponding path loss values of the data channel, the signal to noise ratio of presently described data channel is obtained.

   4th, according to the method described in claim 1, it is characterised in that described according to the data channel signal to noise ratio, with reference to specific broadcast parameter, the actual coding number of data packets sent is specifically included：

   It is described according to the data channel signal to noise ratio, get the corresponding bLock error rate of the data channel signal to noise ratio；

   According to the bLock error rate and the specific broadcast system parameter, the actual coding number of data packets of the transmission is obtained.

   5th, the computational methods of the coded data packet quantity sent in a kind of broadcast system, it is characterised in that methods described includes：

   When meeting preparatory condition, the second parameter is fed back to emitter；

   The emitter determines the corresponding data channel signal to noise ratio of second parameter, and determine the corresponding bLock error rate of the data channel signal to noise ratio according to second parameter received；

   The emitter determines actual coding number of data packets according to the bLock error rate with reference to specific broadcast parameter.

   6th, method according to claim 5, it is characterised in that second parameter at least includes system reference or the corresponding signal to noise ratio of synchronizing signal.

   7th, method according to claim 5, it is characterised in that the preparatory condition that meets is specifically included：

   When second parameter is less than predetermined threshold value, second parameter is fed back to the emitter. 8th, method according to claim 5, it is characterized in that, the emitter determines the corresponding data channel signal to noise ratio of second parameter, and determine that the corresponding bLock error rate of the data channel signal to noise ratio is specifically included according to second parameter received：

   The emitter selects minimum value in second parameter received, and obtains the corresponding channel SNRs of the minimum value, obtains the corresponding bLock error rate of the channel SNRs.

   9th, the computing device of the coded data packet quantity sent in a kind of broadcast system, it is characterised in that the equipment includes：

   Signal-to-noise ratio computation unit, for according to the first parameter estimation data channel signal to noise ratio；Number decision unit, for according to the data channel signal to noise ratio, with reference to specific broadcast system parameter, the actual coding number of data packets sent.

   10th, equipment according to claim 9, it is characterised in that first parameter at least includes farthest broadcast distances.

   11, equipment according to claim 9, it is characterised in that the signal-to-noise ratio computation unit includes：

   Path loss calculation subelement, for according to first parameter, obtaining the corresponding path loss values of the data channel；

   Signal-to-noise ratio computation subelement, for according to the corresponding path loss values of the data channel, obtaining the signal to noise ratio of presently described data channel.

   12nd, equipment according to claim 9, it is characterised in that the number decision unit is specifically included：

   Error rate calculation subelement, for according to the data channel signal to noise ratio, getting the corresponding bLock error rate of the data channel signal to noise ratio；

   Packet determination subelement, for according to the bLock error rate and the specific broadcast system parameter, obtaining the actual coding number of data packets of the transmission.

   13rd, the computing device of the coded data packet quantity sent in a kind of broadcast system, it is characterised in that the equipment includes：

   Feedback unit, for when meeting preparatory condition, the second parameter to be fed back to emitter；Bit error rate determining unit, for the emitter according to second parameter received, determines the corresponding data channel signal to noise ratio of second parameter, and determine the corresponding bLock error rate of the data channel signal to noise ratio；

   Number decision unit, for the emitter according to the bLock error rate, actual coding number of data packets is determined with reference to specific broadcast parameter. 14th, equipment according to claim 13, it is characterised in that second parameter at least includes system reference or the corresponding signal to noise ratio of synchronizing signal.

   15th, equipment according to claim 13, it is characterised in that the preparatory condition that meets is specifically included：

   When second parameter is less than predetermined threshold value, second parameter is fed back to the emitter.

   16th, equipment according to claim 13, it is characterised in that the bit error rate determining unit specifically for：

   The emitter selects minimum value in second parameter received, and obtains the corresponding channel SNRs of the minimum value, obtains the corresponding bLock error rate of the channel SNRs.

   17th, the computing device of coded data packet quantity is sent in a kind of broadcast system, it is characterised in that described device includes：

   First processor, for according to the first parameter estimation data channel signal to noise ratio；

   The first processor, is additionally operable to according to the data channel signal to noise ratio, with reference to specific broadcast system parameter, the actual coding number of data packets sent.

   18th, device according to claim 17, it is characterised in that first parameter at least includes farthest broadcast distances.

   19th, device according to claim 17, it is characterised in that the first processor specifically for：

   According to first parameter, the corresponding path loss values of the data channel are obtained；According to the corresponding path loss values of the data channel, the signal to noise ratio of presently described data channel is obtained.

   20th, device according to claim 17, it is characterised in that the first processor also particularly useful for：

   It is described according to the data channel signal to noise ratio, get the corresponding bLock error rate of the data channel signal to noise ratio；

   According to the bLock error rate and the specific broadcast system parameter, the actual coding number of data packets of the transmission is obtained.

   21st, the computing device of the coded data packet quantity sent in a kind of broadcast system, it is characterised in that described device includes：

   Transmitter, for when meeting preparatory condition, the second parameter to be fed back to emitter；Second processor, for the emitter according to second parameter received, determines the corresponding data channel signal to noise ratio of second parameter, and determine that the data channel signal to noise ratio is corresponding BLock error rate；

   The second processor, is additionally operable to the emitter according to the bLock error rate, actual coding number of data packets is determined with reference to specific broadcast parameter.

   22nd, device according to claim 21, it is characterised in that second parameter at least includes system reference or the corresponding signal to noise ratio of synchronizing signal.

   23rd, device according to claim 21, it is characterised in that the preparatory condition that the transmitter is met includes：

   When second parameter is less than predetermined threshold value, second parameter is fed back to the emitter.

   24th, device according to claim 21, it is characterised in that the second processor specifically for：

   The emitter selects minimum value in second parameter received, and obtains the corresponding channel SNRs of the minimum value, obtains the corresponding bLock error rate of the data channel signal to noise ratio.