CN102571272B - Method and device for receiving service data in communication system, and baseband chip - Google Patents

Abstract

A method for receiving service data in a communication system, a receiving device, and a baseband chip, wherein the receiving method includes: receiving service data, the service data including a plurality of data blocks, wherein the data blocks include information codes and check codes; The business data is subjected to the first verification and the second verification; outputting a predetermined number of information codes whose first verification is successful and the second verification has been completed. The technical solution saves the memory of the baseband chip.

Description

Service data receiving method, receiving device, and baseband chip in communication system

technical field

The invention relates to the technical field of mobile communication, in particular to a method for receiving business data in a communication system, a receiving device, and a baseband chip.

Background technique

Long Term Evolution (LTE, Long Term Evolution) is the evolution of the third generation of mobile communications (3G), which improves and enhances the air access technology of 3G, adopts Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology and multiple Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) is the only standard for its wireless network evolution. Under the 20MHz spectrum bandwidth, it can provide a peak rate of 300Mbit/s downlink and 150Mbit/s uplink, while improving the performance of cell edge users, increasing cell capacity and reducing system delay. Compared with 3G, LTE has the advantages of high communication rate, high spectrum utilization, low wireless network delay, wide area coverage and backward compatibility. However, the realization of LTE puts forward higher requirements for the design of user equipment (UE, User Equipment) terminals. It is necessary to improve the ability of the baseband chip in the terminal to process business data, and at the same time save the storage space in the baseband chip as much as possible.

In the LTE system, the service data sent from the base station to the user equipment is organized in the form of a transport block (TB, Transport Block) and a code block (CB, Code Block). Figure 1 shows a schematic diagram of the data structure of the service data. The base station What needs to be sent is the TB information code, and usually the base station needs to perform the following processing on the TB information code: First, perform CRC processing on the TB information code, that is, add a TB check code after the TB information code to form a TB data; then, perform code block segmentation on the TB data, that is, divide the TB data into n parts of CB information codes; then, perform CRC processing on each part of the CB information code, that is, in each part of the CB information The CB check code is added after the code to form CB data (such as CB data 1, CB data 2, etc.); finally, these CB data are sequentially concatenated to form service data sent from the base station to the user equipment. In other words, in order to ensure correct service data transmission between the base station and user equipment, each CB has an independent CRC (Cyclic Redundancy Check, cyclic redundancy check code) check word (ie, CB check code), and the entire TB also has a CRC check word (ie TB check code). Whether the service data is successfully received can be detected through the CRC check, and if the reception fails, the user equipment will instruct the base station to retransmit.

The processing flow of receiving service data by the baseband chip in the existing user equipment is as follows:

Step 1. Wait for the decoder to output and save the decoded data of a CB, and perform the CRC check of the CB data;

Step 2. If the CRC check of the CB data is correct, then the CB information code of the correct CB data is cascaded in series in the buffer area of the baseband chip; if it is not full of one TB data, then continue to perform step 1; if If one TB of data is accumulated, skip to step 4;

Step 3. If the CRC check of the CB data fails, it indicates that the TB data has failed to receive, and the processing ends;

Step 4. Carry out the CRC check of TB data, if the check is successful, output the TB information code of the TB data to the memory outside the chip for calling by the upper layer protocol; if the check fails, it indicates that the TB data has failed to receive, and the processing ends.

According to the existing processing process of the baseband chip, the buffer area in the chip needs to reserve the storage space of the entire TB data, thus occupying a lot of chip memory.

For more related technical solutions, please refer to the publication number: US2010303016A1, and the title of the invention is: System and Method for Transport Block Size Design for Multiple-Input, Multiple-Output (MIMO) in a Wireless Communications System (multiple-input multiple-output transmission block size In the U.S. patent application documents of the design method and system of the wireless communication system), but the above-mentioned problems have not been solved yet.

Contents of the invention

The problem solved by the invention is to save storage space in the baseband chip in the process of processing the service data sent by the base station by the user equipment.

In order to solve the above problems, an embodiment of the present invention provides a method for receiving business data in a communication system, including: receiving business data, the business data includes a plurality of data blocks, wherein the data blocks include information codes and check codes ; Performing the first check and the second check on the business data; outputting a predetermined number of information codes for which the first check is successful and the second check has been completed.

Optionally, the data block is coded block CB data, and the CB data includes a CB information code and a CB check code; performing the first check and the second check on the service data includes: performing a check on the CB data Perform the first check, and perform the second check on the CB information code of the CB data.

Optionally, the outputting the predetermined number of information codes whose first verification is successful and the second verification has been completed includes: outputting the predetermined number of the CB data whose first verification is successful and the second verification has been completed CB information code output.

Optionally, after the output of the predetermined number of information codes that the first verification is successful and the second verification has been completed, it further includes: until the first verification of the CB data fails or the first verification of all CB data Check and the second check of all CB information codes is completed; if the second check of all the CB information codes is successful, then it is determined that the business data is received successfully; if the first check of CB data fails, or all the CB information If the second verification of the code fails, it is determined that the service data has failed to be received.

Optionally, performing the second verification on the CB information code of the CB data includes: in addition to performing the second verification on the CB information code of the CB data for the first time, the scheduled second verification for this time The second check is performed on the check data obtained by concatenating the number of CB information codes and the remainder obtained through the second check last time.

Optionally, the communication system is an LTE system.

Optionally, the predetermined number is less than the number of data blocks.

Optionally, if the second verification of all the CB information codes is successful, all the output CB information codes are sequentially concatenated to form TB data, wherein the TB data includes TB information codes and TB check codes.

Optionally, the first check and the second check are CRC check or parity check or MD5 check or bcc exclusive OR check.

Optionally, the first check is a CB CRC check, and the second check is a TB CRC check.

The embodiment of the present invention also provides a device for receiving business data in a communication system, including: a receiving unit for receiving business data, the business data includes a plurality of data blocks, wherein the data blocks include information codes and checksums code; a check unit, used to perform first check and second check on the business data received by the receiving unit; an output unit, used to convert the first check according to the check result of the check unit The verification is successful and the predetermined number of information codes that have completed the second verification are output.

An embodiment of the present invention also provides a baseband chip including the above receiving device.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

The user equipment receives service data, and the service data includes multiple data blocks, wherein the data blocks include information codes and check codes. The baseband chip performs the first check and the second check on the service data, and then outputs a predetermined number of information codes that have succeeded in the first check and completed the second check. Since both the first check and the second check are performed on the received business data, and the information code that the first check is successful and the second check is completed is output to the outside of the baseband chip, this can save the internal memory of the baseband chip. cache space.

In a specific embodiment, the data block is coded block CB data, and a predetermined amount of CB data is stored in the baseband chip, and a first check is performed on these CB data and a second check is performed on the CB information code of the CB data. verification, if the first verification of these CB data is successful and the second verification has been completed, a predetermined number of these CB data will be output until the first verification of all CB data and the second verification of the CB information code of all CB data The verification is completed; if the first verification of the CB data fails or the second verification of all the CB information codes fails, it is determined that the service data reception fails. Wherein, the first check is a CB CRC check, and the second check is a TB CRC check.

In a specific embodiment, the predetermined number may be less than the number of CB information codes in one TB of data, such as 1-3, so that when the user equipment receives the service data sent by the base station, the cache in the baseband chip only needs to save part For CB data, there is no need to reserve the storage space of the entire TB data, which saves the memory of the baseband chip.

Description of drawings

FIG. 1 is a schematic diagram of a data structure of business data;

FIG. 2 is a schematic flowchart of a method for receiving service data in a communication system according to an embodiment of the present invention;

3 is a schematic diagram of a baseband chip receiving service data according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of the storage relationship between the buffer memory and the external memory in the baseband chip of the present invention;

Fig. 5 is a schematic structural diagram of an apparatus for receiving service data in a communication system according to an embodiment of the present invention.

Detailed ways

In view of the existing processing flow for receiving service data sent by the base station, the baseband chip in the user equipment needs to cache the entire TB of data, thereby occupying more chip memory. After research, the inventor provides a service data receiving in the communication system The method and the baseband chip realize that when the user equipment receives the service data sent by the base station, the cache of the baseband chip only needs to save part of the CB data, and does not need to reserve the storage space of the entire TB data, thereby saving the memory of the baseband chip .

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

FIG. 2 is a schematic flowchart of a specific implementation manner of a method for receiving service data in a communication system according to the present invention. Referring to Fig. 2, the method for receiving service data in the communication system includes:

Step S1: receiving business data, the business data includes a plurality of data blocks, wherein the data blocks include information codes and check codes;

Step S2: performing a first check and a second check on the business data;

Step S3: Outputting a predetermined number of information codes that the first verification is successful and the second verification has been completed.

The method for receiving service data in a communication system shown in FIG. 2 will be described in detail below with reference to the embodiment and with reference to FIG.

It should be noted that, in the following specific embodiments, the first check is a CB CRC check, and the second check is a TB CRC check. Those skilled in the art know that the verification of the decoded CB data and TB data usually uses a cyclic redundancy check (CRC) code for verification. In this embodiment, the CRC verification is mainly used as an example for description. However, it is not limited to this in practical applications, and may also be parity check, MD5 check, bcc exclusive OR check (block check character), etc.

Step S1: receiving service data, the service data includes a plurality of data blocks, wherein the data blocks include information codes and check codes.

In the embodiment of the present invention, the communication system is an LTE system, such as a TD-LTE system, or an FDD-LTE system (LTE system in frequency division duplex mode). In this embodiment, a TD-LTE system is mainly used as an example for description, and a user equipment receives service data sent from a base station. The service data includes a plurality of data blocks, wherein the data blocks include information codes and check codes. Specifically, at the physical layer of the TD-LTE system, the data block is coded block CB data, and the CB data includes a CB information code and a CB check code.

Usually, the service data sent from the base station to the user equipment is to send OFDM symbols through radio frequency in the unit of transmission block TB, wherein the OFDM symbols are several original data bits processed by the sending end (ie, the base station) through signal processing (such as: fast Fourier transform, parallel/serial conversion, inserting cyclic prefix CP and digital/analog conversion, etc.); The opposite signal processing process at the sending end (such as: removing CP, serial/parallel conversion, fast Fourier transform, and analog/digital conversion, etc.).

Further, the base station sends scheduling information to the user equipment before sending service data, and the scheduling information includes: what modulation method and what MIMO mode (such as space division diversity, transmission diversity, etc.) are used for the delivered sub-data frame , encoding rate, and the length of one TB data or one CB data, etc. Correspondingly, the baseband chip 1 in the user equipment can concatenate the CB information code part of the received several CB data (ie code block data) into the TB data (ie transport block data) according to the scheduling information.

Step S2: Perform the first check and the second check on the service data.

In this embodiment, after receiving the service data, the user equipment will perform a first check on the CB data, and perform a second check on the CB information code of the CB data.

Specifically, first, the baseband chip 1 will respectively perform MIMO decoding, descrambling, de-rate matching and forward error correction (FEC, Forward Error Correction) decoding on the CB data through the decoder 11; wherein, the MIMO decoding can Through multiple processors, multiple CB data are decoded in parallel, and descrambling and de-rate matching can also be performed in parallel, and then the CB data is forward error corrected and decoded by another processor array, and the decoded CB data is output and stored in the cache memory 12 of the baseband chip.

Then, the CB CRC check is carried out to each CB data by the CB checker 13 respectively. Those skilled in the art know that the CB data sent from the base station usually includes a k-bit CB information code and an r-bit CB check code, Wherein, both the information code and the check code are binary numbers, and the check code is generally a cyclic redundancy check (CRC) code.

Specifically, the process of performing a CB CRC check on the CB data includes:

First, divide the CB data by the CB generation code to get the remainder. Wherein, the CB generation code is a binary number of r+1 bits, and the check code of r bits can be generated based on the CB generation code at the sending end, as follows: first, the k-bit CB information code of the CB data is sent to Shift left by r bits, fill the r positions vacated on the right with zeros; then, divide the CB information code (k+r bits) shifted left by r bits by the CB generated code, and the remainder is the r bits Check code; finally, the obtained r-bit check code is spliced with the k-bit information code to obtain the CB data to be sent, wherein the CB data includes a k-bit CB information code and an r-bit CB check code. In this embodiment, the decimal number corresponding to the CB generated code is a prime number. This is because: if the decimal number corresponding to the CB generation code is a composite number, since the composite number includes multiple factors, for example, 16 is a composite number that includes 1, 2, 4, 8, 16 and other factors. That is to say, when the CB CRC check is performed on the CB data, if the CB data can be divisible by a binary number (CB generation code) corresponding to a composite number, then the CB data can also be divisible by all factors of the composite number This will increase the false detection rate of the CB CRC check. And the characteristic of prime number is: except 1 and itself, can not be divisible by other natural numbers, so in the present embodiment, use the binary number corresponding to prime number as described CB generation code and can improve the accuracy that CB data is done CB CRC check.

At the receiving end, the received CB data (including k-bit CB information code and r-bit CB check code) is used for CRC checking with the CB generation code, and whether the received CB data is correct is determined according to the remainder. Specifically: if the remainder is zero, determine that the CB check is correct; if the remainder is not zero, determine that the CB check fails. Further, perform CB CRC verification on CB data one by one according to the above-mentioned method for CB CRC verification on the CB data, and when the CB CRC verification of CB data fails, step S5 is executed to determine that the service data reception fails.

Different from the prior art, in this embodiment, in addition to performing a CB CRC check on the CB data, it is also necessary to perform a TB check on the CB information codes of a predetermined number of CB data through the TB checker 14 in the baseband chip 1. CRC check. Specifically, the predetermined number can be determined according to the size of the cache memory 12 in the baseband chip 1. Since the purpose of this technical solution is to save the cache memory on the baseband chip, the predetermined number is less than the size of the data block. Number, for example, the predetermined number can be 1 to 3 (generally 0.768Kbyte-2.304Kbyte), but not limited thereto, and should be less than the total number of CB information codes in one TB of data.

In this embodiment, the CB data includes a CB information code and a CB check code, and the TB data includes a TB information code and a TB check code, or is equivalent to a concatenation of CB information codes of multiple CB data. Assume that the CB data includes k-bit CB information codes and r-bit CB check codes, and the TB data includes M-bit TB information codes and N-bit TB check codes. Since the CB information codes of all the CB data are sequentially connected The TB data is formed (assumed to be S CB data), so M+N=S*k.

The process of performing TB CRC check on the CB information code of the CB data will be described in detail below by taking the predetermined quantity as one CB data as an example.

Specifically, for example, the cache 12 in the baseband chip 1 currently stores a piece of CB data, and the CB CRC check of the CB data has been completed. Perform TB CRC verification on the CB information code of the CB data, specifically: input the CB information code of the CB data into the TB checker 14 to perform TB CRC verification, and complete the TB CRC of the CB information code of the CB data After verification, step S3 is executed to output the CB information code of the CB data.

It should be noted that, unlike the above-mentioned CB CRC check for the CB data, the TB CRC check for the CB information code of the CB data here is to divide the CB information code by the TB generation code to obtain remainder a. Because this TB CRC check is to carry out TB CRC check to the CB information code of described CB data for the first time, so there is not the remainder that previous TB CRC check obtains in TB verifier 14. It should be noted that when the complete TB data (that is, all CB information codes belonging to the TB data) is not completely input into the TB checker 14, no judgment is made on whether the TB CRC check is correct. For the formation process of the TB generation code, reference may be made to the above-mentioned formation process of the CB generation code, which will not be repeated here.

Then, the cache memory 12 in the baseband chip 1 stores the next CB data, and the CB CRC check of the CB data has been completed. Then, continue to input the CB information code in the CB data into the TB checker 14 for TB CRC check. It should be noted that the CB information code input to the TB checker 14 will be spliced to obtain the check data after the remainder a obtained after the previous TB CRC check, and the check data is "remainder a+ the CB information input this time code", and then perform TB CRC check on the check data to obtain the remainder b.

By analogy, until the cache 12 in the current baseband chip 1 stores the last CB data of this service data, and the CB CRC check of the CB data has been completed. Next, input the CB information code in the CB data into the TB checker 14 for TB CRC check, to obtain the final remainder of the TB CRC check of the entire TB data, if the remainder is zero, it is determined that the service data is received successfully ; If the remainder is not zero, determine that service data reception fails.

The above-mentioned embodiment describes the TB CRC check of the CB information code whose predetermined number is 1 CB data. When the predetermined number is 2-3, those skilled in the art can refer to the above method and make Corresponding changes are sufficient, and details are not repeated here.

Step S3: Outputting a predetermined number of information codes that the first verification is successful and the second verification has been completed.

This step includes: outputting CB information codes of a predetermined amount of the CB data whose first verification is successful and the second verification has been completed. In a specific embodiment, according to the size of the cache memory 12 in the baseband chip 1, this step includes: if the cache memory 12 in the baseband chip 1 only saves 1 CB data, then the predetermined number is 1 CB data, then for all When the CB CRC check of the CB data is successful and the TBCRC check has been completed, the CB information code of the CB data is output to the external memory 2 outside the baseband chip 1. If the cache memory 12 in the baseband chip 1 can store 2 CB data, then the predetermined quantity is 2 CB data, then the TBs of the CB CRC checks of the 2 CB data are successful and the 2 CB data have been completed During the CRC check, the CB information codes of the two CB data are output to the external memory 2 outside the baseband chip 1 . And so on, no more details here.

In this embodiment, the CB information code of a predetermined amount of CB data can be output from the cache memory 12 in the baseband chip 1 to the external memory 2 outside the baseband chip 1 by direct memory access (Direct Memory Access, DMA) controller 15 . Wherein, the direct storage access technology is a technology well known to those skilled in the art, and will not be repeated here.

After this step, the method further includes: stopping the verification until the first verification of the CB data fails or the first verification of all CB data and the second verification of all CB information codes are completed.

Further, with reference to FIG. 4 , it is a schematic diagram of a storage relationship between the cache in the baseband chip and the external memory of the present invention. As shown in Figure 4, after receiving the successful CB information code (such as CB information code 1) of the first check (i.e. CB CRC check) in the buffer memory 12, the second check is done to the CB information code (i.e. TB CRC check), just output in the described external memory 2 earlier, because the CB information code 1 stored in cache like this has done copy in described external memory 2, the storage space of cache 12 just can be like this It is used to store the next CB information code, thereby saving the cache space in the baseband chip. Those skilled in the art know that generally the cost of the cache (cache) in the baseband chip is higher than that of the external memory (off-chip storage), so saving the cache space in the baseband chip can reduce the cost of manufacturing the baseband chip in the user equipment.

It should be noted that, in Fig. 4, it is described as an example that the cache 12 only caches one CB information code (here, because the CB data has passed the CRC check, the CB check code can be discarded). In practical applications, According to this technical solution, the buffer 12 may also buffer 1 to 3 CB information codes, which will not be described in detail here.

According to the processing result of step S3, if the second verification of all the CB information codes is successful, it is determined that the business data is received successfully, and all the output CB information codes are sequentially concatenated to form TB data, wherein the TB data includes TB information Code and TB check code, then the upper layer protocol can call the TB data stored in the external memory 2. If the first verification of the CB data fails, or the second verification of all the CB information codes fails, it is determined that the service data has failed to receive, and the user equipment will transmit all the data belonging to the TB in the external memory 2 The CB information codes of the CB data are all discarded.

Based on the above method for receiving service data in a communication system, an embodiment of the present invention further provides a device for receiving service data in a communication system. FIG. 5 is a schematic structural diagram of an apparatus for receiving service data in a communication system according to an embodiment of the present invention. In this embodiment, the communication system is a TD-LTE system. Referring to FIG. 5 , the receiving device 3 includes: a receiving unit 31 , a checking unit 32 , an output unit 33 and a determining unit 34 .

Wherein, the receiving unit 31 is used for receiving service data, and the service data includes a plurality of data blocks, wherein the data blocks include information codes and check codes. The verification unit 32 is configured to perform a first verification and a second verification on the service data received by the receiving unit. The output unit 33 is configured to output a predetermined number of information codes whose first verification is successful and the second verification has been completed according to the verification result of the verification unit.

In this embodiment, the receiving device 3 is located in the baseband chip in the mobile terminal (ie user equipment), and is used to process service data sent from the base station to the user equipment, wherein the service data includes a plurality of coded block CB data , wherein the CB data includes a CB information code and a CB check code.

In a specific embodiment, the receiving device 3 further includes a cache (not shown), which is connected to the receiving unit 31 and used to save a predetermined amount of CB data in the service data, wherein the predetermined The quantity is determined based on the size of the cache, for example, if the cache size is 0.768Kbyte-2.304Kbyte, then the predetermined quantity of CB data corresponds to 1-3 CB data.

The checking unit 32 is configured to perform a first check on the CB data, and perform a second check on the CB information code of the CB data. In a specific embodiment, the checking unit 32 specifically includes: a first checking unit 321 and a second checking unit 322 . Wherein, according to different verification methods adopted, the first verification unit 321 and the second verification unit 322 may be a CRC verification unit or a parity verification unit or an MD5 verification unit or a bcc exclusive-or verification unit.

In this embodiment, since the CRC check is used as an example for description, the first check unit 321 in FIG. 5 is used to perform a first check on the CB data, and the second check unit 322 It is used to perform a second check on the CB information code of the CB data. In this embodiment, the first checking unit 321 is a CB CRC checking unit, and the second checking unit 322 is a TB CRC checking unit. Further, the verification unit 32 stops verification until the first verification of the CB data fails or the first verification of all CB data and the second verification of all CB information codes are completed.

Specifically, the verification process of the first verification unit 321 includes: performing CB CRC verification on the CB data to obtain a remainder; if the obtained remainder is zero, then determine the CB CRC of the CB data The verification is correct; if the remainder is not zero, it is determined that the CB CRC verification of the CB data fails. The verification process of the second verification unit 322 includes: performing TB CRC verification on the CB information code of the CB data. It should be noted that, when the TBCRC check is performed on the CB information code of the CB data, except that the TB CRC check is performed on the CB information code of the CB data for the first time, the TB CRC check is carried out this time. The TB CRC check is performed on the check data obtained after splicing the predetermined number of CB information codes and the remainder obtained by the previous TB CRC check.

Further, when the complete TB data (that is, all CB information codes belonging to the TB data) is not completely input into the second checking unit 322, it is not judged whether the TB CRC check is correct; until the TB When the last CB information code of the data is input to the second verification unit 322, the final remainder of the TB CRC verification of the entire TB data is obtained after the TB CRC verification, and if the remainder is zero, it is determined that the service data is received successfully ; If the remainder is not zero, determine that service data reception fails.

Further, according to the verification result of the verification unit 32, through the output unit 33, the CB CRC verification success of the verification unit 32 and the predetermined amount of CB data that has completed the TB CRC verification CB information code output. Specifically, in this embodiment, a predetermined number of CBs are output to a memory (not shown) outside the baseband chip through direct storage access.

The determination unit 34 then determines that the service data is received successfully if the TB CRC verification of all the CB information codes is successful according to the verification result of the verification unit 32; if the CB CRC verification of the CB data fails, or If the TB CRC check of all the CB information codes fails, it is determined that the service data reception fails.

An embodiment of the present invention also provides a baseband chip, and the baseband chip includes the apparatus for receiving service data in the communication system shown in FIG. 4 above. The receiving device is used to implement the above-mentioned method for receiving service data in the communication system, and its processing process can refer to the specific embodiments of the above-mentioned method, which will not be repeated here.

In practical applications, the baseband chip may at least include a decoder 11 , a cache 12 , a CB checker 13 , a TB checker 14 and a direct storage access controller 15 as shown in FIG. 3 .

Wherein, the decoder 11 may correspond to the receiving unit 31 shown in FIG. 5 , for receiving and decoding the TB data (or CB data) sent from the base station, and storing the decoded TB data (or CB data) in the cache 12 The CB checker 13 corresponds to the CB CRC check unit 321 shown in Figure 5, and the TB checker 14 corresponds to the TB CRC check unit 322 shown in Figure 5; the direct storage access controller 15 corresponds to the one shown in Figure 5 The output unit 33 shown.

To sum up, in this technical solution, the user equipment receives service data, and the service data includes multiple data blocks, wherein the data blocks include information codes and check codes. The baseband chip performs the first check and the second check on the service data, and then outputs a predetermined number of information codes that have succeeded in the first check and completed the second check. Since both the first check and the second check are performed on the received business data, and the information code that the first check is successful and the second check is completed is output to the outside of the baseband chip, this can save the internal memory of the baseband chip. cache space.

In a specific embodiment, the data block is coded block CB data, and a predetermined amount of CB data is stored in the baseband chip, and a first check is performed on these CB data and a second check is performed on the CB information code of the CB data. verification, if the first verification of these CB data is successful and the second verification has been completed, a predetermined number of these CB data will be output until the first verification of all CB data and the second verification of the CB information code of all CB data The verification is completed; if the first verification of the CB data fails or the second verification of all the CB information codes fails, it is determined that the service data reception fails. Wherein, the first check is a CB CRC check, and the second check is a TB CRC check.

In a specific embodiment, the predetermined number may be less than the number of CB information codes in one TB of data, such as 1-3, so that when the user equipment receives the service data sent by the base station, the cache in the baseband chip only needs to save part For CB data, there is no need to reserve the storage space of the entire TB data, which saves the memory of the baseband chip.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (11)

1. A method for receiving service data in a communication system, characterized in that, comprising: Receive service data, the service data includes a plurality of data blocks, wherein the data blocks include information codes and check codes, the data blocks are coded block CB data, and the CB data includes CB information codes and CB check codes ; Performing a first check on the CB data, and performing a second check on the CB information code of the CB data, the second check on the CB information code of the CB data includes: In addition to performing the second verification on the CB information code of the CB data, the verification data obtained after splicing the predetermined number of CB information codes that are subjected to the second verification this time and the remainder obtained through the second verification last time are performed. The second verification, the predetermined number is less than the number of data blocks; Output the CB information code of the predetermined number of CB data whose first verification is successful and the second verification has been completed, until the first verification of the CB data fails or the first verification of all CB data and all CB data The second verification of the information code is completed; If the second verification of all the CB information codes is successful, it is determined that the service data is received successfully; If the first verification of the CB data fails, or the second verification of all the CB information codes fails, it is determined that the service data reception fails. 2. The method for receiving service data in a communication system according to claim 1, wherein the communication system is an LTE system. 3. The method for receiving service data in a communication system according to claim 1, wherein if the second verification of all the CB information codes is successful, then all the output CB information codes are serially concatenated to form a TB data, wherein the TB data includes a TB information code and a TB check code. 4. The method for receiving service data in the communication system according to claim 1, wherein the first check and the second check are CRC check or parity check or MD5 check or bcc exclusive OR check test. 5. the method for receiving business data in the communication system according to claim 1, is characterized in that, described first verification is CB CRC verification, and described second verification is TB CRC verification. 6. A receiving device for service data in a communication system, characterized in that it comprises: A receiving unit, configured to receive business data, the business data includes a plurality of data blocks, wherein the data blocks include information codes and check codes, the data blocks are coded block CB data, and the CB data includes CB information codes and CB check code; A verification unit, configured to perform a first verification on the CB data received by the receiving unit, and perform a second verification on the CB information code of the CB data until the first verification of the CB data Failure or the first verification of all CB data and the second verification of all CB information codes are completed, stop verification, and the verification unit performs the second verification on the CB information codes of the CB data. When the CB information code of the CB data is subjected to the second verification, in addition to performing the second verification on the CB information code of the CB data for the first time, the predetermined number of CB information codes that are subjected to the second verification this time and the previous Perform the second check on the check data obtained after splicing the remainder obtained through the second check, and the predetermined number is less than the number of the data blocks; A determining unit, configured to determine that service data is received successfully if the second verification of all the CB information codes succeeds according to the verification result of the verification unit; if the first verification of all CB data fails, or all If the second verification of the CB information code fails, it is determined that the service data reception fails; An output unit, configured to output the CB information codes of the predetermined amount of CB data whose first verification is successful and the second verification has been completed according to the verification result of the verification unit. 7. The device for receiving service data in a communication system according to claim 6, wherein the communication system is an LTE system. 8. The device for receiving service data in a communication system according to claim 6, wherein the checking unit comprises a first checking unit and a second checking unit; wherein the first checking unit is used for A first check is performed on the CB data, and the second check unit is configured to perform a second check on a CB information code of the CB data. 9. The receiving device of business data in the communication system according to claim 6, characterized in that, the first check unit and the second check unit are CRC check units or parity check units or MD5 checks or bcc XOR check unit. 10. The receiving device of business data in the communication system according to claim 8, characterized in that, the first checking unit is a CB CRC checking unit, and the second checking unit is a TB CRC checking unit. 11. A baseband chip, characterized by comprising a device for receiving service data in the communication system according to any one of claims 6 to 10.