CN109586847B - Method for combining multiple different transmission blocks - Google Patents
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- CN109586847B CN109586847B CN201811478947.8A CN201811478947A CN109586847B CN 109586847 B CN109586847 B CN 109586847B CN 201811478947 A CN201811478947 A CN 201811478947A CN 109586847 B CN109586847 B CN 109586847B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
- H04L1/0011—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to payload information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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Abstract
The application discloses a method for merging a plurality of different data blocks, which comprises the steps of assuming a sending serial number n of an ith data block in a current period, setting serial numbers for all data blocks received in sequence based on the current assumed serial number of the ith data block to form a sequence relation; partially inverting the data blocks in the current period according to the difference sequence between the data blocks corresponding to the sequence relationship; merging each inverted data block and each non-inverted data block according to the sequence relation; and carrying out decoding check on the combined data block. Traversing the possible sequence numbers of the data block i, attempting to merge and decode checks. The method and the device solve the problem of merging of a plurality of different data blocks in the 5G communication technology, so that a receiving end obtains gains brought by repeated transmission.
Description
Technical Field
The invention relates to the field of data reception in wireless communication technology, in particular to a method for combining a plurality of different transmission blocks.
Background
In the existing technical solution, the combining mode involving multiple transmissions at the receiving end directly adopts selective combining, equal gain combining, or maximum ratio combining. Such as the technical proposal disclosed in the publication number CN 102271023B. By using the existing technical scheme, only the condition that the data transmitted for multiple times are the same can be combined, and under the condition that the data transmitted for multiple times are different, direct combination cannot be carried out.
For example, the physical broadcast channel PBCH specified in the current fifth generation mobile communication Technology 5G-NR (New Radio Access Technology in 3GPP) protocol, four times of original data transmitted within an 80ms period, that is, the four times of original data are not identical, and there is no way to combine them according to the combining scheme in the previous 3GPP long term evolution Technology L TE.
Disclosure of Invention
The invention provides a method for combining a plurality of different transmission blocks, which is used for combining a plurality of received different data blocks.
The invention provides a method for merging a plurality of different data blocks, which comprises the following steps,
A. receiving an ith data block; when the decoding verification of the ith data block fails, receiving a next data block;
B. assuming a sending sequence number n of an ith data block in a current period, setting sequence numbers for all data blocks received in sequence based on the current assumed sequence number of the ith data block to form a sequence relation;
C. partially inverting the data blocks in the current period according to the difference sequence between the data blocks corresponding to the sequence relationship; merging each inverted data block and each non-inverted data block according to the sequence relation; carrying out decoding verification on the combined data block;
for the data block which is not in the current period, judging whether the data block in the second period is unique, if so, performing decoding verification on the data block, otherwise, taking the data block in the second period as the data block in the current period, and returning to the step C, wherein the second period is the next period adjacent to the current period;
if the decoding check fails, executing step D;
D. increasing the sequence number to be N +1, and returning to execute the step B until the sequence number is increased to be N and the decoding check fails; wherein N is the maximum value of the transmission sequence number of the ith data block in the current period;
E. and B, receiving the next data block, and returning to execute the step B until the total number of the received data blocks is equal to the total number of the data blocks in the current period.
Preferably, the method further comprises the step of,
F. and when the total number of the received data blocks is equal to the total number of the data blocks sent in the first period and the decoding check of the combined data blocks fails, receiving the next data block, discarding the ith data block, taking the rest received data blocks as the data blocks in the current period, taking the first data block in the period as the ith data block, and returning to execute the step B.
And if the decoding check of the data block is passed, descrambling the data block to obtain the frame information.
The time slot of the sending period is 80ms, and the data block is sent once every 20 ms; the data block is an SSB, and the sequence number is an SSB frame number; the total number of data blocks in the sending period is 4;
the merging of the inverted data blocks and the non-inverted data blocks includes adding LL Rs after inversion to the LL Rs bits of the non-inverted data blocks.
Said decoding verification in step C further comprises,
respectively calculating the absolute value of LL Rs of each inverted data block and the absolute value of LL Rs of each non-inverted data block, and calculating the sum of the absolute values of LL Rs of each combined data block to obtain the absolute value of LL Rs of the combined data block under each assumed condition;
weighting the LL Rs absolute value of the unique data block according to a set weight to obtain a weighted LL Rs absolute value;
and determining the decoding priority of the data block under each hypothesis according to the LL Rs absolute value of the combined data block under each hypothesis and the weighted LL Rs absolute value.
According to the method, the data blocks in the current period are partially inverted according to the difference sequence between the data blocks corresponding to the sequence relationship through the hypothesis of the data block sequence and the sequence relationship formed on the basis of the hypothesis; merging each inverted data block and each non-inverted data block according to the sequence relation; carrying out decoding verification on the combined data block; the problem of merging a plurality of different data blocks is solved, so that a receiving end obtains gain caused by repeated transmission.
Drawings
Fig. 1 shows the structure of two frame signals, one is when the maximum SSB number in a field is 64, and the other is when the maximum SSB number is not 64.
Fig. 2A and 2B are schematic flow charts illustrating an embodiment of the present application in which the sequence contents of a TTI is 80ms, data is transmitted once every 20ms, and four transmissions are not completely the same. Fig. 2A is a schematic flow chart of merging two data blocks and merging three data blocks, and fig. 2B is a schematic flow chart of merging four data blocks following fig. 2A.
Fig. 3 is a flow chart of an ordering process taking the merging of two transport blocks as an example.
Fig. 4 is a schematic flow chart illustrating a process of merging multiple data blocks by a receiving end when an originating end sends I data blocks within one period according to the present application.
Fig. 5 is a diagram of a test case simulation result by using the method for merging a plurality of different transport blocks according to the present application.
Detailed Description
For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
The transmitting end can repeatedly transmit for at most n times in one period, original data generated by the n times are not identical in content, different parts are continuous and periodic, and n transmitting sequences are recorded as sequence numbers 1-n. In order to obtain the gain caused by repeated transmission, data combination is required at the receiving end.
If retransmission is needed, in order to simplify the process and reduce the number of stored difference sequences, the transmitting sequences retransmitted several times after the first transmission are compared with the transmitting sequence transmitted for the first transmission to obtain a plurality of difference sequences. When the sequence sent by the sending end continuously shows a periodicity, the sending sequences of a plurality of times in a period are compared with the sending sequence of the first time in the period to obtain a difference sequence.
At the receiving end, if the data received for the first time is wrong after being judged, the 2 nd time data is received, and when the data receiving time exceeds 1, the received data is merged.
The physical broadcast channel PBCH in the current fifth generation mobile communication technology 5G-NR protocol is taken as an example for illustration. According to the current NR protocol, the PBCH TTI is 80ms, data is transmitted every 20ms, and the sequence contents of four transmissions are not completely the same, as specified in the original data sequence generation rule in the protocol 38.212. Since the original sequences are different, the scrambling sequences used within 4 20ms are also different, different scrambling sequences are generated according to the frame number, and the scrambling sequences have 4 bits of frame number information to distinguish 20ms time intervals. Referring to fig. 1, fig. 1 shows the structure of two frame signals, one is when the maximum SSB number in a field is 64, and the other is when the maximum SSB number is not 64.
Referring to fig. 2A and 2B, fig. 2A and 2B are schematic flow charts illustrating an embodiment of the present application in which the sequence contents of a TTI is 80ms, data is transmitted every 20ms, and four transmissions are not completely the same. Fig. 2A is a schematic flow chart of merging two data blocks and merging three data blocks, and fig. 2B is a schematic flow chart of merging four data blocks.
When the receiving end receives the first SSB data block, LL Rs are saved and decoding check is carried out, if the check is passed, descrambling is carried out, and relevant information such as the frame number is obtained.
If the received first SSB data block check fails, after 20ms, receiving a second SSB; although different parts in the original data are continuous, the sequence number of the different parts of the original data which is sent for the first time cannot be known in advance, so that the receiving end needs to perform corresponding inversion processing on partial data of the data block according to the received difference sequence by assumption, combine the inverted data, then perform decoding and CRC check, and then enable the data block to be combined correctly in an assumed and attempted mode.
Assuming that the frame number of a first data block is 00, then, the sequence representing the content difference between a second data block and the first data block is a first difference sequence, reversing the part of the second data block according to the received first difference sequence, merging the reversed second data block and the first data block, namely, assuming that the SSB frame number received for the first time is 00, then, partially reversing LL Rs of one data block according to the frame number assumption and the stored difference sequence, directly aligning and adding LL Rs after reversing with LL Rs of the other data block, decoding and CRC checking the merged data block, if passing the check, descrambling to obtain the related information such as the frame number, and if not passing the check, performing CRC checking, performing descrambling to obtain the related information such as the frame number
Assuming that the frame number of a first data block is 01, then, a sequence representing the content difference between a third data block and the first data block is a second difference sequence, reversing the part of the first data block according to the received first difference sequence, reversing the part of a second data block according to the second difference sequence, merging the reversed first data and the reversed second data, namely, assuming that the frame number of the SSB received for the first time is 01, then, partially reversing LL Rs according to the frame number assumption and the difference sequence stored by a transmitting end, directly adding the reversed LL Rs in a bit alignment manner, decoding and CRC checking the merged data block, if the combined data block passes the check, descrambling to obtain related information such as the frame number, and if the combined data block does not pass the check, then, obtaining related information such as the frame number and the like
Assuming that the frame number of a first data block is 10, then, a sequence representing the content difference between a fourth data block and the first data block is a third difference sequence, reversing the part of the first data block according to a received second difference sequence, reversing the part of a second data block according to the third difference sequence, merging the reversed first data and the reversed second data, namely, assuming that the frame number of an SSB received for the first time is 10, then, performing partial reversing operation on LL Rs according to the assumed frame number and the stored difference sequence, directly adding the reversed LL Rs in a bit-aligned manner, decoding and CRC checking the merged data block, if the combined data block passes the check, descrambling to obtain related information such as the frame number, and if the combined data block does not pass the check, then, obtaining related information such as the frame number by descrambling
Assuming that the frame number of the first data block is 11, then the sequence of the next received data block (i.e. the second data block) enters the next period, and since it is not in the same period, the difference between the two original data contents is not clear, so the merging under this condition is not considered, at this time, the decoding decision is directly made for the second data block, i.e. assuming that the frame number of the first received SSB is 11, the frame numbers of the two times are 11 and 00 respectively, wherein because in the two TTIs, the two original data contents are not necessarily only different in frame number, and the specific different contents are unknown, the merging cannot be performed, at this time, the decoding is directly performed by using LL Rs received for the second time, and then whether the data block received for the second time is correct is checked.
When the data blocks received twice are combined, decoding and checking are carried out in sequence under four conditions, and as long as one of the checks is successful, descrambling is carried out and frame number information is taken out; and if the check is not passed, receiving a third data block to merge the three data blocks.
When receiving the third data block:
supposing that the received 3 SSB frame numbers are 00-01-10 in sequence, inverting the part of the second data block according to the first difference sequence, inverting the part of the third data block according to the second difference sequence, merging the inverted second data block, the inverted third data block and the first data block, namely, performing partial inversion operation on LL Rs of two blocks according to the frame number hypothesis and the difference sequence, directly performing bit-alignment addition on LL Rs after inversion and LL Rs of the other block, decoding and CRC checking the merged data block, descrambling if the merged data block passes the check to obtain related information of the frame number and the like, and if the merged data block does not pass the check, performing descrambling to obtain related information of the frame number and the like
Assuming that the received 3 SSB frame numbers are 01-10-11 in sequence, inverting the part of the first data block according to the first difference sequence, inverting the part of the second data block according to the second difference sequence, inverting the part of the third data block according to the third difference sequence, merging the inverted first data block, the inverted second data block and the inverted third data block, namely, partially inverting LL Rs in the data according to the frame number hypothesis and the difference sequence, directly adding the inverted LL Rs in a contraposition manner, decoding and CRC checking the merged data block, descrambling to obtain related information such as the frame number if the combined data block passes the check, and otherwise, performing descrambling to obtain related information such as the frame number if the combined data block does not pass the check
Assuming that the received 3 SSB frame numbers are 10-11-00 in sequence, at this time, since the three blocks are not in the same TTI, three times of combining cannot be directly performed, and since the three blocks are twice combined before 10-11, in this case, only LL Rs received for the third time needs to be directly decoded, and then whether the third time of receiving is correct is checked.
Assuming that the received 3 SSB frame numbers are 11-00-01 in sequence, in this case, since the last two blocks are in the same TTI, the last two blocks can be merged, at this time, merging is performed according to a method of merging twice, and then whether the two blocks pass or not is checked in sequence, that is, according to the received first difference sequence, a portion of the second data block is reversed, the reversed second data block is merged with the first data block, and decoding check is performed on the merged data block.
If none of these four assumptions at the time of three merges passed the check, 20ms later a fourth SSB would need to be received to perform the merge of the four data blocks.
When the fourth data block is received,
assuming that the frame numbers of 4 received data blocks are 00-01-10-11 in sequence, LL Rs of four received data blocks can be combined exactly under the condition that the frame numbers of the received data blocks are 00-01-10-11 in sequence, then LL Rs of three data blocks are subjected to partial inversion operation according to the frame number hypothesis and the difference sequence, and LL Rs after inversion are directly added in a contraposition mode with LL Rs of another data block, namely, part of a second data block is inverted according to a first difference sequence, part of a third data block is inverted according to a second difference sequence, part of a fourth data block is inverted according to a third difference sequence, the first data block, the second data block after inversion, the third data block after inversion and the fourth data block after inversion are combined, the combined data blocks are decoded and CRC is checked, if the combined data blocks pass the check, descrambling is carried out to obtain relevant information with equal frame numbers, and if the combined data blocks do not pass the check, the equal frame numbers are combined
Supposing that the frame numbers of the received 4 data blocks are 01-10-11-00 in sequence, because the fourth data block, the first data block, the second data block and the third data block are not in the same TTI, under the assumption, only the LL Rs received for the fourth time need to be directly decoded and checked, if the check is passed, descrambling is carried out to obtain related information such as the frame number, and if the check is not passed, the descrambling is carried out to obtain related information such as the frame number
Assuming that the frame numbers of the received 4 data blocks are 10-11-00-01 in sequence, at this time, since the first and second data blocks are not verified during the two-time combination, only the data blocks in different TTIs are combined, that is, the method for specifically combining LL Rs. received twice after combination is to combine according to the two combining methods, if the combined data blocks are verified, descrambling is performed to obtain the related information such as the frame number, and if the combined data blocks are not verified, the frame numbers are not verified, the method for specifically combining LL Rs. received twice is to combine according to the two combining methods
Supposing that the frame numbers of the received 4 data blocks are 11-00-01-10 in sequence, the LL Rs received for three times after three times of combination are combined according to a three-time combination method, then check is carried out in sequence, namely, part of the second data block is reversed according to the first difference sequence, part of the third data block is reversed according to the second difference sequence, the reversed second data block, the reversed third data block and the first data block are combined, the combined data block is decoded and checked, if the check is passed for a certain time, the descrambling is carried out to take out related information, if the check is not passed for any of the four assumptions, the descrambling is carried out to take out related information, and if the check is not passed for any of the four assumptions, the descrambling is carried out to obtain the third data block
Discarding the first SSB, then receiving the fifth SSB after 20ms, merging the four data blocks by using the received 4 SSBs of the second, third, fourth and fifth, at this time, taking the second, third, fourth and fifth data blocks as the first, second, third and fourth data blocks in the same period respectively, and returning to the step of assuming that the index number of the sequence number 1 is received when the four data blocks are received.
In view of the above process, based on the assumption that the frame number is assumed after each data reception, four cases need to be traversed, and therefore, an index can be used for representing the reliability of a certain assumption, so as to reduce the number of traversal times and reduce the complexity, in the present application, the reliability of the assumption is represented by the size of the absolute value of LL Rs before decoding after merging, and the assumption is more reliable if the absolute value of LL Rs is larger.
Referring to fig. 3, fig. 3 is a flowchart illustrating an ordering process for merging two transport blocks.
First, the magnitude of the absolute value of each data block LL Rs after merging under each assumption is calculated, respectively, that is:
under a first assumed condition, summing the absolute value of LL Rs of the inverted second data block and the absolute value of LL Rs of the first data block to obtain a first LL Rs absolute value;
under a second assumed condition, summing the absolute value of LL Rs of the inverted second data block and the absolute value of LL Rs of the inverted first data block to obtain a second absolute value of LL Rs;
under a third assumed condition, summing the absolute value of LL Rs of the inverted second data block and the absolute value of LL Rs of the inverted first data block to obtain a third absolute value of LL Rs;
under a fourth assumed condition, weighting the absolute value of LL Rs of the second data block according to the weight to obtain a fourth LL Rs absolute value;
the calculated absolute values of LL Rs are then sorted, and the data block decoding order is determined in descending order of the absolute values of LL Rs
The absolute value of the first LL Rs > the absolute value of the second LL Rs > the absolute value of the third LL Rs > the absolute value of the fourth LL Rs, the decoding sequence is divided into the following parts according to the priority:
data block merged under first hypothesis > data block merged under second hypothesis > data block merged under third hypothesis > data block merged under fourth hypothesis
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a receiving end merging multiple data blocks when the originating end sends I data blocks within one period according to the present application. When there are I data blocks transmitted in one cycle, I cases need to be assumed, and merging is attempted for the data blocks of each assumed case. The specific method comprises the following steps:
Referring to fig. 5, fig. 5 is a diagram of a test case simulation result by using a method of combining a plurality of different transport blocks according to the present application, in the test case, four frame numbers are assumed to be the frame number of the first SSB block, and then the frame numbers of the subsequently received SSB blocks are sequentially increased, LL Rs inversion method, in which at the originating end, the original bits are all set to 0 except the frame number, then the frame numbers are set to 01, 10, and 11, and then the three original sequences are encoded and rate-matched, so as to obtain three longer sequences ( sequences 1, 2, and 3) and stored, at the receiving end, LL Rs are correspondingly inverted according to the frame number assumption, that is:
when the frame number is 01, inversion is only needed according to the sequence 1 stored by the originating terminal, when the value of the sequence 1 is 1, LL R at the corresponding position is subjected to polarity inversion, when the value of the sequence 1 is 0, LL R at the corresponding position is unchanged, and after LL Rs are transformed, the inversion can be directly subjected to the alignment addition with LL Rs of another block;
when the frame number is 10, the inversion is only needed according to the sequence 2 stored by the originating terminal, and the inversion rule is as above.
When the frame number is 11, the sequence 3 stored by the originating terminal needs to be inverted, and the inversion rule is as above.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for merging a plurality of different data blocks, the method comprising,
A. receiving an ith data block; when the decoding verification of the ith data block fails, receiving a next data block;
B. assuming a sending sequence number n of an ith data block in a current period, setting sequence numbers for all data blocks received in sequence based on the current assumed sequence number of the ith data block to form a sequence relation;
C. partially inverting the data blocks in the current period according to the difference sequence between the data blocks corresponding to the sequence relationship; merging each inverted data block and each non-inverted data block according to the sequence relation; carrying out decoding verification on the combined data block;
for the data block which is not in the current period, judging whether the data block in the second period is unique, if so, performing decoding verification on the data block, otherwise, taking the data block in the second period as the data block in the current period, and returning to the step C, wherein the second period is the next period adjacent to the current period;
if the decoding check fails, executing step D;
D. increasing the sequence number to be N +1, and returning to execute the step B until the sequence number is increased to be N and the decoding check fails; wherein N is the maximum value of the transmission sequence number of the ith data block in the current period;
E. b, receiving the next data block, and returning to execute the step B until the total number of the received data blocks is equal to the total number of the data blocks in the current period;
F. and when the total number of the received data blocks is equal to the total number of the data blocks sent in the first period and the decoding check of the combined data blocks fails, receiving the next data block, discarding the ith data block, taking the rest received data blocks as the data blocks in the current period, taking the first data block in the period as the ith data block, and returning to execute the step B.
2. The method of claim 1, further comprising, if the data block decoding check passes, descrambling the data block to obtain the frame information.
3. The method of claim 1 or 2, wherein the transmission periodic time slot is 80ms, and a data block is transmitted every 20 ms; the data block is an SSB, and the sequence number is an SSB frame number; the total number of data blocks in the sending period is 4;
the merging of the inverted data blocks and the non-inverted data blocks includes adding LL Rs after inversion to the LL Rs bits of the non-inverted data blocks.
4. The method of claim 3 wherein said decoding checks in step C further comprise,
respectively calculating the absolute value of LL Rs of each inverted data block and the absolute value of LL Rs of each non-inverted data block, and calculating the sum of the absolute values of LL Rs of each combined data block to obtain the absolute value of LL Rs of the combined data block under each assumed condition;
weighting the LL Rs absolute value of the unique data block according to a set weight to obtain a weighted LL Rs absolute value;
and determining the decoding priority of the data block under each hypothesis according to the LL Rs absolute value of the combined data block under each hypothesis and the weighted LL Rs absolute value.
5. The method of claim 3, wherein the ith data block is a first data block transmitted in a first cycle; step A, receiving a next data block as a second data block;
when the transmission sequence number of the first data block in the first period is assumed to be 00, the step C partially inverts the data blocks in the period according to the difference sequence between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
according to a first difference sequence representing the content difference between the second data block and the first data block, reversing the part of the second data block, and merging the reversed second data block and the first data block;
when the transmission sequence number of the first data block in the first period is assumed to be 01, the step C partially inverts the data blocks in the period according to the difference sequence between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
inverting a portion of the second data block according to a second difference sequence characterizing a difference in content between a third data block and the first data block, inverting a portion of the first data block according to the first difference sequence, and merging the inverted second data block with the inverted first data block; when the transmission sequence number of the first data block in the first period is assumed to be 10, the step C partially inverts the data blocks in the period according to the sequence difference between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
inverting a portion of the first data block according to the second difference sequence, inverting a portion of the second data block according to a third difference sequence that characterizes a difference in content between a fourth data block and the first data block, and merging the inverted second data block with the inverted first data block;
when it is assumed that the transmission sequence number of the first data block in the first period is 11, step C determines whether the data block in the second period uniquely includes the second data block, and determines that the second data block is not transmitted in the same period as the first data block and the data block transmitted in the second period is the second data block.
6. The method of claim 5, wherein step E said receiving a next data block is a third data block,
when the transmission sequence number of the 1 st data block in the first period is assumed to be 00, partially inverting the data blocks in the period according to the sequence difference between the data blocks corresponding to the sequence relation in the step C, and merging each inverted data block and each non-inverted data block,
inverting a portion of the second data block according to a first difference sequence, inverting a portion of the third data block according to a second difference sequence, and merging the inverted second data block, the inverted third data block, and the first data block;
when the transmission sequence number of the first data block in the first period is assumed to be 01, the step C partially inverts the data blocks in the period according to the difference sequence between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
inverting a portion of the first data block according to a first difference sequence, inverting a portion of the second data block according to a second difference sequence, inverting a portion of the third data block according to a third difference sequence, and merging the inverted second data block, the inverted third data block, and the inverted first data block;
when the transmission sequence number of the first data block in the first period is assumed to be 10, step C determines whether the data block in the second period only includes the third data block, and determines that the third data block and the first data block are not transmitted in the same period and the data block transmitted in the second period is the third data block;
when the transmission sequence number of the first data block in the first period is assumed to be 11, the step C partially inverts the data blocks in the period according to the sequence difference between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
and inverting the part of the third data block according to the first difference sequence, and merging the inverted third data block and the second data block.
7. The method of claim 6, wherein the receiving the next data block of step E is a fourth data block,
when the transmission sequence number of the first data block in the first period is assumed to be 00, the step C partially inverts the data blocks in the period according to the difference sequence between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
inverting a portion of the second data block according to a first difference sequence, inverting a portion of the third data block according to a second difference sequence, inverting a portion of the fourth data block according to a third difference sequence, and merging the inverted second data block, the inverted third data block, the inverted fourth data block, and the first data block;
when the transmission sequence number of the first data block in the first period is assumed to be 01, step C judges whether the data block in the second period only includes the fourth data block, and judges that the fourth data block is not transmitted in the same period as the first data block and the second and third data blocks, and the data block transmitted in the second period is the fourth data block;
when the transmission sequence number of the first data block in the first period is assumed to be 10, the step C partially inverts the data blocks in the period according to the sequence difference between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
inverting a portion of the fourth data block based on the first difference sequence, and merging the inverted fourth data block with the third data block;
when the transmission sequence number of the first data block in the first period is assumed to be 11, the step C partially inverts the data blocks in the period according to the sequence difference between the data blocks corresponding to the sequence relationship, and combines each inverted data block and each non-inverted data block,
and inverting the part of the third data block according to the first difference sequence, inverting the part of the fourth data block according to the second difference sequence, and merging the inverted fourth data block, the inverted third data block and the second data block.
8. The method of claim 7, wherein the receiving the next data block is a fifth data block in step E, and the discarding the ith data block and the taking the received (i + 1) th data block as the ith data block in step F comprises discarding the first data block and taking the second data block, the third data block, the fourth data block and the fifth data block as the first data block, the second data block, the third data block and the fourth data block respectively sent in the current period.
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| US9497097B2 (en) * | 2012-03-12 | 2016-11-15 | Texas Instruments Incorporated | Inserting sequence numbers into data blocks merged from data streams |
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