WO2015058351A1

WO2015058351A1 - Method and device for calculating quantity of encoded data packets transmitted within broadcast system

Info

Publication number: WO2015058351A1
Application number: PCT/CN2013/085656
Authority: WO
Inventors: 武雨春
Original assignee: 华为技术有限公司
Priority date: 2013-10-22
Filing date: 2013-10-22
Publication date: 2015-04-30
Also published as: CN104782097A

Abstract

Provided are a method and a device for calculating the quantity of broadcast data packets. In the absence of closed-loop feedback, the specific number of encoded data packets can still be determined. On the premise that the success rate of data packet transmission is ensured, excessive wastage is thereby avoided. The specific implementation mode is: a first parameter is obtained; a block error ratio is obtained according to the first parameter, or, when preset conditions are met, the block error ratio is obtained according to a second parameter; according to the block error ratio, the actual number of encoded data packets is obtained. The present invention is used to calculate the specific transmission quantity of broadcast data packets.

Description

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

BACKGROUND OF THE INVENTION Currently, in the content of 3GPP LTE R12, there is no closed loop of the physical layer in Device To Device (D2D) communication. This results in the use of Fountain Coding at the transmitting end. Since the transmitter cannot obtain the physical layer closed-loop feedback information from the receiver, the transmitter cannot confirm whether the receiver correctly received a sufficient number of packets. Furthermore, the transmitter cannot determine the correct number of encoded data packets to be transmitted and which are guaranteed to be received by the receiving end. When the number of encoded data packets transmitted by the transmitter is too large, the communication resources are wasted in addition to the receiver receiving the encoded data packets, and when the transmitted encoded data packets are insufficient, the reliability of the communication cannot be guaranteed.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and a device for calculating a number of encoded data packets transmitted in a broadcast system, which are capable of determining a specific number of encoded data packets without guarantee of closed loop feedback, and ensuring data packet transmission. Under the premise of success rate, it does not cause excessive waste. In order to achieve the above object, an embodiment of the present invention uses the following technical solution: In a first aspect, a method for calculating a number of broadcast data packets is provided, where the method includes: estimating a data channel signal to noise ratio according to a first parameter; The data channel signal to noise ratio, combined with the specific broadcast system parameters, results in the number of actual encoded data packets transmitted. In a first possible implementation, in combination with the first aspect, the first parameter includes at least a farthest broadcast distance. In a second possible implementation, in combination with the first aspect, the estimating a channel signal to noise ratio according to the first parameter includes: acquiring, according to the first parameter, a path loss value corresponding to the data channel; The path loss value corresponding to the channel acquires a signal to noise ratio of the current data channel. In a third possible implementation, in combination with the first aspect, the obtaining, according to the data channel signal to noise ratio, the specific number of the actual encoded data packets, according to the specific broadcast parameter, specifically includes: a noise ratio, a block error rate corresponding to the signal to noise ratio of the channel is obtained; and the number of the actual encoded data packets sent is obtained according to the block error rate and the specific broadcast system parameter.

A second aspect provides a method for calculating a number of encoded data packets sent in a broadcast system, the method comprising: feeding back a second parameter to a transmitter when the preset condition is met; 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 according to the block error rate, combining specific broadcast parameters Determine the actual number of encoded packets. In a first possible implementation, in combination with the second 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, in combination with the second aspect, the satisfying the preset condition specifically includes: feeding back the second parameter to the transmitter when the second parameter is lower than a preset threshold. In a third possible implementation, in combination with the second aspect, the transmitter determines, according to the received second parameter, a data channel signal to noise ratio corresponding to the second parameter, and determines The block error rate corresponding to the signal-to-noise ratio of the data channel specifically includes: the transmitter selecting a minimum value among the received second parameters, and acquiring a channel signal-to-noise ratio corresponding to the minimum value, acquiring the The block error rate corresponding to the channel signal to noise ratio.

The third aspect provides a computing device for broadcasting the number of data packets, including: a signal to noise ratio calculating unit, configured to estimate a data channel signal to noise ratio according to the first parameter; and a number determining unit, configured to perform signal to noise ratio according to the data channel The number of actual encoded data packets sent is obtained by combining specific broadcast system parameters.

In a first possible implementation, in combination with the third aspect, the first parameter includes at least a farthest broadcast distance.

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

In a third possible implementation, the number determining unit specifically includes: a bit error rate calculating subunit, configured to obtain, according to the data channel signal to noise ratio, a block error corresponding to the signal to noise ratio of the data channel. Rate

a data packet determining subunit, configured to obtain, according to the block error rate and the specific broadcast system parameter, the number of the actually encoded data packets to be sent. A fourth aspect provides a computing device for transmitting the number of encoded data packets in a broadcast system, where the device includes: a feedback unit, configured to feed back a second parameter to a transmitter when a preset condition is met; a bit error rate determining unit And determining, by the transmitter, the 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 signal channel to noise ratio of the data channel; And a number determining unit, configured to determine, according to the block error rate, the actual number of encoded data packets according to the specific broadcast parameter. In a first possible implementation manner, in combination with the fourth 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, in combination with the fourth aspect, the satisfying the preset condition includes: feeding back the second parameter to the transmitter when the second parameter is lower than a preset threshold. In a third possible implementation, in combination with the fourth aspect, the error rate determining unit is specifically configured to: select, by the transmitter, a minimum value in the received second parameter, and obtain the minimum value Corresponding channel signal to noise ratio, obtaining a block error rate corresponding to the channel signal to noise ratio. The fifth aspect provides a computing device for the number of encoded data packets sent in a broadcast system, where the device includes: a first processor, configured to estimate a channel signal to noise ratio according to the first parameter; And obtaining, according to the data channel signal to noise ratio, a specific number of transmitted encoded data packets in combination with specific broadcast system parameters. In a first possible implementation, in combination with the fifth aspect, the first parameter includes at least a farthest broadcast distance.

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

Obtaining, according to the first parameter, a path loss value corresponding to the channel, and acquiring a signal to noise ratio of the current data channel according to the path loss value corresponding to the channel. In a third possible implementation, in combination with the fifth aspect, the first processor is further configured to: obtain, according to the data channel signal to noise ratio, a block error rate corresponding to the channel signal to noise ratio; Obtaining the number of actually encoded data packets sent according to the block error rate and the specific broadcast system parameter. The sixth aspect provides a computing device for transmitting the number of encoded data packets in a broadcast system, where the device includes: a transmitter, configured to feed back a second parameter to a transmitter when a preset condition is met; And determining, by the transmitter, the 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 is further configured to determine, according to the block error rate, the number of actual encoded data packets according to the specific broadcast parameter. In a first possible implementation, in combination with the sixth aspect, the second parameter includes at least a signal to noise ratio corresponding to the system reference or the synchronization signal.

In a second possible implementation, the preset condition that the transmitter meets includes: feeding back the second parameter to the transmitter when the second parameter is lower than a preset threshold. 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. Obtaining a block error rate corresponding to a signal to noise ratio of the data channel. The method and device for calculating the number of broadcast data packets are provided by the embodiment of the present invention, and the block error rate is obtained according to the first parameter, or is obtained according to the second parameter when the preset condition is met. Block error rate, and obtain the number of actual encoded data packets transmitted according to the block error rate; thus, it is possible to determine the number of specific encoded data packets without closed loop feedback, and ensure the success rate of data packet transmission. Under the premise, it does 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 is a brief description of the drawings used in the embodiments or the prior art description, The drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work. FIG. 1 is a schematic diagram of a method for calculating a number of broadcast data packets according to an embodiment of the present invention;

2 is a schematic diagram of another method for calculating the number of broadcast data packets according to an embodiment of the present invention;

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

4 is a detailed schematic diagram of a method for calculating the number of broadcast data packets according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another method for calculating the number of broadcast data packets according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a computing device for broadcasting a data packet according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a computing device for broadcasting a number of broadcast packets according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a computing device for broadcasting a number of broadcast packets according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a computing device for broadcasting a data packet according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a device for calculating the number of broadcast data packets according to an embodiment of the present invention; FIG. 1 is a schematic structural diagram of a device for calculating the number of broadcast data packets according to an embodiment of the present invention.

detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention. The embodiment of the invention provides a method for calculating the number of broadcast data packets. As shown in FIG. 1, the method includes:

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

102. Obtain, according to the channel signal to noise ratio, a specific number of transmitted actual encoded data packets in combination with specific broadcast system parameters. The method for calculating the number of broadcast data packets provided by the embodiment of the present invention obtains a first parameter and obtains a block error rate according to the first parameter, and then obtains the number of actually encoded data packets 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 no excessive waste is caused under the premise of ensuring the success rate of data packet transmission. Compared with the previous method, the embodiment of the present invention further 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, feeding the second parameter to the transmitter;

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

203. The transmitter determines, according to the block error rate, the number of actual encoded data packets to be sent according to specific broadcast parameters. A method for calculating the number of broadcast data packets according to an embodiment of the present invention, by feeding back a second parameter to a transmitter when a preset condition is met, the transmitter determining, 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, wherein the transmitter determines the actual number of encoded data packets according to the block error rate and the specific broadcast parameter; In the absence of closed loop feedback, still The number of specific encoded data packets can be determined, and no excessive waste is caused under the premise of ensuring the success rate of data packet transmission.

In order to enable a person 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 with reference to specific embodiments. The embodiment of the invention further provides a detailed calculation method for the number of broadcast data packets, as shown in the figure.

As shown in 3, the method specifically includes:

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

302. Obtain, according to the channel signal to noise ratio, a specific broadcast parameter, and obtain the number of actually encoded data packets.

As shown in FIG. 3, step 301 specifically includes:

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

3012. Obtain a signal to noise ratio of a 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 that the transmitter needs to cover the farthest receiver. Of course, the first parameter can also be implemented by other modes.

The path loss value here, that is, Path Loss (PL), is the loss value due to the electromagnetic wave transmission environment.

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

3021. Acquire, according to a signal to noise ratio of the data channel, a block error rate corresponding to the signal to noise ratio of the channel.

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

The block error rate (BLER) is the ratio of the error data block to the total number of data blocks during the transmission of the communication data. The higher the bit error rate, the data packet indicating that the transmitted data is not normally received. more. The specific broadcast parameters refer to: the channel type currently used for transmitting communication data, the signal modulation method used by the physical layer, and the specific coding type, etc. These parameters are all selected according to actual communication conditions. The following is an example to illustrate the specific process of the method. First, the transmitter obtains the path loss of the current communication environment according to the specific parameters of the current communication environment before transmitting the specific communication data packet. For example: The expected distance of the current communication is 2.4 km, the frequency of the carrier frequency band is 2 GHz, the bandwidth of the communication system is 10 MHz, and the maximum transmission power of the transmitter is 10 dBm. From the above parameters, combined with the formula for calculating the path loss:

^PL = ³² · ⁴⁵ + ²⁰ ΗΆΜΗζ)) + 20 lg d(km) + Δ , in this formula, _PL is the abbreviation of path loss, 32.45 is the classical parameter value obtained under a lot of simulation experiments, /( ^{M fe} ) It is the carrier frequency in the communication environment, the unit is MHz, which refers to the farthest distance of the expected target of this communication, the unit is km, and Δ is pre-set by the transmitter and receiver before communication. Calculated compensation value in this communication environment. When the value of Δ is 4, the above data is brought into the formula, thereby:

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 determining the path loss, 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 / (the dish) is the bandwidth value, the unit is Hz. P in the formula is the transmitter's transmit power in dBm.

Substituting the above data, you can get "\« ₌ 10 -110 _ (-174 ₊ 1(^(10 * 10 ⁶ ))) = 4^. Thirdly, according to the correspondence between the signal-to-noise ratio and the block error rate obtained by a large number of data simulation results, the corresponding block error rate is obtained when the current signal-to-noise ratio is 4 dB. For example: the current EVA channel is used, and the physical layer uses QPSK modulation. And the encoding method of 1/3 Turbo gives a BLER of 10%. Finally, according to the obtained current block error rate and the redundancy of the transmission code, the number of actually encoded packets under the condition is obtained.

Assume that the current Fountain Coding needs to ensure that the decoding failure rate is ^ 5%, and the actual number of encoded packets of the final transmitter can be calculated according to 1-10%. Where K is the number of packets originally input by the transmitter, 5% is the redundancy of the transmitter currently under the premise of guaranteeing the decoding failure rate, and 10% is the block error rate obtained before. The W = *l.n obtained from the above data is the final number of encoded packets. A method for calculating the number of encoded data packets sent in a broadcast system according to an embodiment of the present invention, obtains a first parameter, and obtains a block error rate according to the first parameter, and then obtains actual coded data according to a block 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 excessive waste is not caused under the premise of ensuring the success rate of data packet transmission. The embodiment of the invention further provides a method for calculating the number of broadcast data packets. As shown in FIG. 5, the method includes:

401. Feed a second parameter to the transmitter when the preset condition is met;

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

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

4041. The transmitter selects a minimum value among the received second parameters, and obtains The channel signal to noise ratio corresponding to the minimum value is based on a block error rate corresponding to the channel signal to noise ratio. In this embodiment, the second parameter is Reference Signal Received Quality (RSRQ). Of course, the second parameter may also be implemented by other embodiments. Here, the RSRQ is the RSRQ of the received Discover signal transmitted by the user equipment to the cluster head Cluster Header during the Discovery phase of the communication establishment. The following is an example to illustrate the specific process of the method. First, when the preset condition is satisfied, the reference signal reception quality RSRQ is fed back to the transmitter. Specifically, in the Discover phase of the communication establishment, each D2D user equipment receives the Discover signal, and after receiving, feeds back the received RSRQ of the Discover signal to the cluster head CH to which the user equipment belongs, and the cluster head CH will each user. The RSRQ fed back by the device is sent to the transmitter. It is worth mentioning that, in order to reduce the resource occupation to a certain extent, each user equipment can also set a threshold itself, and only when the RSRQ receiving the Discover signal is lower than the set threshold, the user belongs to the cluster head. CH feedback. Secondly, after receiving the feedback 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 has the following relationship with RSRQ, SNR = RSI^+, where SNR is the minimum value of the received RSRQ, and Δ is between the RS signal and the data channel. A compensation value corresponding to the difference. For example, when using EVA channel, QP SK modulation and 1 / 3 Turbo coding, if ^匪 is 3dB and △ is 0, you can get "\« at this time, the value is 3dB. According to the relevant data obtained from a large number of simulation experiments, it can be obtained that the corresponding block error rate is 20% when W is 3dB. When the specific transmission environment is different, it is sufficient to bring different Δ values into the above formula. After obtaining the corresponding "\«, the corresponding block error rate is obtained according to the same method. Finally, based on the obtained current block error rate and the redundancy of the transmission code, the number of actually encoded packets under this condition is obtained.

Assume that the current fountain code (Fountain Coding) needs to ensure that the probability of decoding failure is The redundancy corresponding to ιο_ ^1ΰ is 5%, and the actual number of encoded packets of the final transmitter can be calculated according to ι_ ² ο%. Where Κ is the number of packets originally input by the transmitter, 5% is the redundancy of the transmitter currently under the premise of guaranteeing the probability of decoding failure, and 20% is the block error rate obtained before. W = *1J1 obtained from the above data is the final number of encoded packets. A method for calculating the number of broadcast data packets according to an embodiment of the present invention, by feeding back a second parameter to a transmitter when a preset condition is met, the transmitter determining, 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 signal-to-noise ratio of the data channel, where the transmitter determines the actual number of encoded data packets according to the block error rate and the specific broadcast parameter; Therefore, in the absence of closed-loop feedback, the number of specific encoded data packets can still be determined, and excessive waste is not caused under the premise of ensuring the success rate of data packet transmission. The embodiment of the present invention provides a computing device 5 for broadcasting the number of data packets. As shown in FIG. 6, the device further includes: a signal to noise ratio calculating unit 51, configured to estimate a data channel signal to noise ratio according to the first parameter; 52. The method is configured to obtain, according to the data channel signal to noise ratio, a specific number of transmitted data packets by combining specific broadcast system parameters. The first parameter therein includes at least the farthest broadcast distance. As shown in FIG. 7, the signal-to-noise ratio calculation unit 51 includes: a path loss calculation sub-unit 511, configured to acquire a path loss value corresponding to the data channel according to the data channel signal-to-noise ratio; The unit 512 is configured to obtain a signal to noise ratio of the current data channel according to the path loss value corresponding to the data channel. Similarly, as shown in FIG. 8, the number determining unit 52 specifically includes: a bit error rate calculating sub-unit 521, configured to obtain a block error rate corresponding to the signal to noise ratio of the data channel according to the data channel signal to noise ratio. ; The data packet determining subunit 522 is configured to obtain, according to the block error rate and the specific broadcast parameter, the number of the actually encoded data packets to be sent. The computing device for the number of broadcast data packets provided by the embodiment of the present invention obtains a block error rate according to the first parameter by acquiring a first parameter, and then obtains an actual number of encoded data packets according to a block error rate; In the absence of closed-loop feedback, the number of specific encoded data packets can still be determined, and no excessive waste is caused under the premise of ensuring the success rate of data packet transmission. The embodiment of the present invention further provides a computing device 6 for transmitting the number of encoded data packets in the broadcast system. As shown in FIG. 9, the device 6 includes: a feedback unit 61, configured to feed back to the transmitter when the preset condition is met. a second parameter; a bit error rate determining unit 62, configured to determine, according to the received second parameter, a data channel signal to noise ratio corresponding to the second parameter, and obtain a signal to noise ratio corresponding to the data channel. The block error rate; the number determining unit 63 is configured to determine, according to the block error rate, the actual number of encoded data packets according to the specific broadcast parameter. The second parameter includes at least a signal to noise ratio corresponding to a system reference or a synchronization signal. The preset condition that the feedback unit 61 needs to meet specifically includes: feeding back the second parameter to the transmitter when the second parameter is lower than a preset threshold. The error rate determining unit 62 is specifically configured to: the transmitter selects a minimum value in the received second parameter, 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. Block error rate. The computing device for broadcasting the number of broadcast packets provided by the embodiment of the present invention, by feeding back a second parameter to the transmitter when the preset condition is met, the transmitter determining, according to the received second parameter, 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, wherein the transmitter determines the actual number of encoded data packets according to the block error rate and the specific broadcast parameter; In the absence of closed-loop feedback, the number of specific encoded data packets can still be determined. Under the premise of ensuring the success rate of data packet transmission, Do not cause too much waste. The embodiment of the present invention further provides a computing device 7 for transmitting the number of encoded data packets in a broadcast system. As shown in FIG. 10, the device 7 includes: a bus 71; and a memory 72 connected to the bus 71, a processor 73, and receiving And a transmitter 75, wherein the memory 72 is configured to store related instructions, the processor 73 executes related instructions for estimating a data channel signal to noise ratio according to the first parameter; the processor 73 executes the relevant instructions and is further configured to use the data according to the data The channel signal to noise ratio, combined with the specific broadcast system parameters, results in the number of actual encoded data packets transmitted. In an embodiment of the present invention, optionally, the processor executes related instructions for estimating a data channel signal to noise ratio according to the first parameter, where the first parameter includes at least a farthest broadcast distance. In the embodiment of the present invention, optionally, the executing the related instruction, the estimating the data channel signal to noise ratio according to the first parameter, specifically: acquiring, according to the first parameter, a path loss value corresponding to the data channel; Obtaining a 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 the relevant instruction, according to the signal-to-noise ratio of the data channel, and the number of the actual encoded data packet that is sent according to the specific broadcast system parameter, specifically: And a data channel signal to noise ratio, a block error rate corresponding to the signal to noise ratio of the data channel is obtained; and the number of the actually encoded data packets sent is obtained according to the block error rate and the specific broadcast system parameter. Therefore, the apparatus for calculating the number of broadcast data packets provided by the embodiment of the present invention obtains the first parameter and 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 number of specific encoded data packets can still be determined, and no excessive waste is caused under the premise of ensuring the success rate of data packet transmission. The embodiment of the invention further provides a computing device for transmitting the number of encoded data packets in a broadcast system. 8, as shown in FIG. 11, the device 8 includes: a bus 81; and a memory 82, a processor 83, a receiver 84, and a transmitter 85 connected to the bus 81, wherein the memory 82 is configured to store related instructions, The processor 83 executes relevant instructions for feeding back a second parameter to the transmitter when the preset condition is met; the processor 83 executing the relevant instruction for the transmitter to determine the first according to the received second parameter a data channel signal to noise ratio corresponding to the two parameters, and determining a block error rate corresponding to the data channel signal to noise ratio; the processor 83 executing a related instruction for the transmitter to combine the specific broadcast according to the block error rate The parameters determine the actual number of encoded packets. In the embodiment of the present invention, optionally, the processor 83 executes related instructions for the transmitter to include at least a signal to noise ratio corresponding to the system reference or the synchronization signal according to the second parameter of the received second parameter. . In the embodiment of the present invention, optionally, the processor 83 executing the relevant instruction for the transmitter according to the preset condition in the received second parameter specifically includes: when the second parameter is lower than the pre- When the threshold is set, the second parameter is fed back to the transmitter. The processor 83 executes relevant instructions 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 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 acquires a block error rate corresponding to the channel signal to noise ratio. The apparatus for calculating the number of broadcast data packets provided by the embodiment of the present invention, by feeding back a second parameter to the transmitter when the preset condition is met, the transmitter determining, according to the received second parameter, 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, wherein the transmitter determines the actual number of encoded data packets according to the block error rate and the specific broadcast parameter; In the absence of closed-loop feedback, the number of specific encoded data packets can still be determined, and no excessive waste is caused under the premise of ensuring the success rate of data packet transmission. It will be apparent to those skilled in the art that, for the convenience and brevity of the description, the specific working processes of the systems, devices and units described above may be referred to the foregoing method embodiments. The corresponding process in the description will not be repeated here. In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the 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 integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units. A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A method for calculating the number of encoded data packets sent in a broadcast system, characterized in that the method includes:

Estimating the data channel signal-to-noise ratio according to the first parameter;

According to the data channel signal-to-noise ratio, combined with specific broadcast system parameters, the actual number of encoded data packets sent is obtained.

2. The method according to claim 1, characterized in that the first parameter includes at least the furthest broadcast distance.

3. The method according to claim 1, wherein the estimating the channel signal-to-noise ratio according to the first parameter includes:

According to the first parameter, the path loss value corresponding to the data channel is obtained; according to the path loss value corresponding to the data channel, the current signal-to-noise ratio of the data channel is obtained.

4. The method according to claim 1, characterized in that, according to the signal-to-noise ratio of the data channel and combined with specific broadcast parameters, obtaining the actual number of encoded data packets sent specifically includes:

According to the signal-to-noise ratio of the data channel, a block bit error rate corresponding to the signal-to-noise ratio of the data channel is obtained;

According to the block error rate and the specific broadcast system parameters, the actual number of encoded data packets sent is obtained.

5. A method for calculating the number of encoded data packets sent in a broadcast system, characterized in that the method includes:

When the preset conditions are met, the second parameter is fed back to the transmitter;

The transmitter determines the signal-to-noise ratio of the data channel corresponding to the second parameter based on the received second parameter, and determines the block error rate corresponding to the signal-to-noise ratio of the data channel;

The transmitter determines the actual number of encoded data packets based on the block error rate and specific broadcast parameters.

6. The method of claim 5, wherein the second parameter at least includes a signal-to-noise ratio corresponding to a system reference or synchronization signal.

7. The method according to claim 5, characterized in that satisfying the preset conditions specifically includes:

When the second parameter is lower than the preset threshold, the second parameter is fed back to the transmitter.

8. The method according to claim 5, wherein the transmitter determines the data channel signal-to-noise ratio corresponding to the second parameter based on the received second parameter, and determines the data channel signal-to-noise ratio. The block error rate corresponding to the noise ratio specifically includes:

The transmitter selects a minimum value among the received second parameters, obtains a channel signal-to-noise ratio corresponding to the minimum value, and obtains a block bit error rate corresponding to the channel signal-to-noise ratio.

9. A device for calculating the number of encoded data packets sent in a broadcast system, characterized in that, the device includes:

The signal-to-noise ratio calculation unit is used to estimate the data channel signal-to-noise ratio based on the first parameter; the number determination unit is used to obtain the actual number of encoded data packets sent based on the data channel signal-to-noise ratio and specific broadcast system parameters.

10. The device according to claim 9, characterized in that the first parameter at least includes the furthest broadcast distance.

11. The device according to claim 9, characterized in that the signal-to-noise ratio calculation unit includes:

Path loss calculation subunit, configured to obtain the path loss value corresponding to the data channel according to the first parameter;

The signal-to-noise ratio calculation subunit is used to obtain the current signal-to-noise ratio of the data channel according to the path loss value corresponding to the data channel.

12. The device according to claim 9, characterized in that the number determining unit specifically includes:

The bit error rate calculation subunit is used 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 is used to obtain the actual number of encoded data packets sent according to the block error rate and the specific broadcast system parameters.

13. A device for calculating the number of encoded data packets sent in a broadcast system, characterized in that the device includes:

A feedback unit, used to feed back the second parameter to the transmitter when the preset conditions are met; a bit error rate determination unit, used for the transmitter to determine the second parameter corresponding to the second parameter based on the received second parameter. Data channel signal-to-noise ratio, and determine the block error rate corresponding to the data channel signal-to-noise ratio;

A number determination unit, configured for the transmitter to determine the actual number of encoded data packets based on the block error rate and specific broadcast parameters.

14. The device according to claim 13, wherein the second parameter at least includes a signal-to-noise ratio corresponding to a system reference or synchronization signal.

15. The device according to claim 13, wherein the satisfying the preset conditions specifically includes:

16. The device according to claim 13, characterized in that the bit error rate determination unit is specifically used to:

17. A device for calculating the number of encoded data packets sent in a broadcast system, characterized in that the device includes:

The first processor is used to estimate the signal-to-noise ratio of the data channel according to the first parameter;

The first processor is also configured 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.

18. The device according to claim 17, wherein the first parameter at least includes the furthest broadcast distance.

19. The device according to claim 17, characterized in that the first processor is specifically used to:

20. The device according to claim 17, characterized in that the first processor is further specifically configured to:

21. A device for calculating the number of encoded data packets sent in a broadcast system, characterized in that the device includes:

The transmitter is used to feed back the second parameter to the transmitter when the preset condition is met; the second processor is used for the transmitter to determine the data corresponding to the second parameter based on the received second parameter. channel signal-to-noise ratio, and determine the corresponding signal-to-noise ratio of the data channel block error rate;

The second processor is also used by the transmitter to determine the actual number of encoded data packets based on the block error rate and specific broadcast parameters.

22. The device according to claim 21, wherein the second parameter at least includes a signal-to-noise ratio corresponding to a system reference or synchronization signal.

23. The device according to claim 21, wherein the preset conditions satisfied by the transmitter include:

24. The device according to claim 21, characterized in that the second processor is specifically used to:

The transmitter selects a minimum value among the received second parameters, obtains the channel signal-to-noise ratio corresponding to the minimum value, and obtains the block error rate corresponding to the data channel signal-to-noise ratio.