CN102957494A - Method for blind test calibration and related devices - Google Patents
Method for blind test calibration and related devices Download PDFInfo
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- CN102957494A CN102957494A CN2011102380641A CN201110238064A CN102957494A CN 102957494 A CN102957494 A CN 102957494A CN 2011102380641 A CN2011102380641 A CN 2011102380641A CN 201110238064 A CN201110238064 A CN 201110238064A CN 102957494 A CN102957494 A CN 102957494A
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Abstract
An embodiment of the invention discloses a method for blind test calibration and related devices which are used for quickly finishing the blind test calibration of downlink control information. The method includes: acquiring decoded N bit downlink control information; performing CRC (cyclical redundancy check) checking to (N-M) bit downlink control information to obtain an M bit CRC result wherein M is a CRC digit and is an integer larger than one and smaller than N; performing RNTI (radio network temporary identity) masking to the M bit CRC result to obtain an M bit RNTI masking result; and comparing the M bit RNTI masking result with the final M bit in the N bit downlink control information, and then judging that if the M bit RNTI masking result and the final M bit are the same, a blind test succeeds, if not, the blind test fails. Besides, the invention further provides the related devices for implementing the method.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of blind check method of calibration and relevant apparatus.
Background technology
At Long Term Evolution (LTE, Long Term Evolution) downlink physical control channel (PDCCH under the agreement, Physical Downlink Control Channel) carries out Downlink Control Information (DCI in, Downlink Control Information) transmission, because subscriber equipment (UE, User Equipment) DCI that does not generally know current transmission is the information of what type, and the information of oneself need also not knowing is in which position.But UE knows own current in what information of expectation, and for example the information in the UE of idle (Idle) state expectation is paging, SI; After initiating random access (Random Access), expectation be RACH Response; Have upstream data etc. to be sent the time, expectation UL Grant etc.For different expectation information, UE is with corresponding Radio Network Temporary Identifier (RNTI, radio network temporary identifier) goes and control channel unit (CCE, Control Channel Element) information (elementary cell of carrying DCI is CCE) is cyclic redundancy check (CRC) code (CRC, Cyclic Redundancy Check) verification, if CRC check success, UE just knows that this information is oneself needs so, also know corresponding DCI type, thereby further solve the DCI content, the process of blind check that Here it is.
After the transmitting terminal of Downlink Control Information determines related data, Downlink Control Information is encoded successively, CRC check, RNTI adds and covers and the processing such as rate-matched, will carry out Downlink Control Information after the above-mentioned processing and be mapped on the interface-free resources and send.
In the prior art, if the UE end needs to receive above-mentioned Downlink Control Information, then need this Downlink Control Information is carried out blind check, namely search for the position at this Downlink Control Information place in the search volume that calculates, Downlink Control Information to this position is deciphered, and successively the Downlink Control Information after the decoding is carried out the RNTI solution and cover and CRC check, if after CRC check, the value of this descending control message is zero entirely, then the blind check success of UE end.
Prior art is to test by the inverse operation of transmitting terminal when checking blind check as a result, namely first the Downlink Control Information after the decoding being carried out the RNTI solution covers, then the result who each RNTI solution is covered carries out CRC check one time, because the UE end need to carry out once solution to each RNTI value and cover, cover if need to carry out the RNTI solution to A blind check result, follow-uply then need to carry out the inferior CRC check of A * B (B is the number of RNTI); Obviously, along with the increase of blind check number of times and RNTI number, the CRC check number of times also can increase suddenly, has greatly increased processing delay.
Summary of the invention
The embodiment of the invention provides a kind of blind check method of calibration and relevant apparatus, is used for finishing rapidly the blind check verification of Downlink Control Information.
Blind check method of calibration provided by the invention comprises: obtain the N position Downlink Control Information after the decoding; N is subtracted M position Downlink Control Information carry out the cyclic redundancy check (CRC) code CRC check, obtain M position CRC check result, described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M; Described M position CRC check result is carried out Radio Network Temporary Identifier RNTI add and cover, obtain M position RNTI and add and cover the result; Described M position RNTI is added the last M position of covering in result and the described N position Downlink Control Information compare, if identical, then blind check success, if not identical, then blind check failure.
Blind check method of calibration provided by the invention comprises: obtain the N position Downlink Control Information after the decoding; N is subtracted M position Downlink Control Information carry out the cyclic redundancy check (CRC) code CRC check, obtain M position CRC check result, described M is the CRC check figure place, and described M is greater than 1 integer, and described N is greater than M; The RNTI solution is carried out in last M position in the Downlink Control Information of described N position cover, obtain M position RNTI solution and cover the result; Described M position RNTI solution is covered the result and described M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
Blind check calibration equipment provided by the invention comprises: acquiring unit is used for obtaining the N position Downlink Control Information after the decoding; Verification unit is used for that N is subtracted M position Downlink Control Information and carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result, and described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M; Add and cover the unit, be used for that described M position CRC check result is carried out Radio Network Temporary Identifier RNTI and add and cover, obtain M position RNTI and add and cover the result; The contrast unit is used for that described M position RNTI is added the last M position of covering result and described N position Downlink Control Information and compares, if identical, then blind check success, if not identical, then blind check failure.
Blind check calibration equipment provided by the invention comprises: acquiring unit is used for obtaining the N position Downlink Control Information after the decoding; Verification unit is used for that N is subtracted M position Downlink Control Information and carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result, and described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M; Solution is covered the unit, is used for that the RNTI solution is carried out in the last M position of described N position Downlink Control Information and covers, and obtains M position RNTI solution and covers the result; The blind check judging unit is used for that described M position RNTI solution is covered the result and described M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
As can be seen from the above technical solutions, the embodiment of the invention has the following advantages: the present invention is when carrying out CRC check to Downlink Control Information, remove first the CRC check position (Downlink Control Information that namely only N is subtracted the M position carries out CRC check) of this Downlink Control Information, cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can finish the blind check verification.Because UE end carries out first CRC check, cover carrying out the RNTI solution, then in the situation that need to carry out the blind check verification to A blind check result, the UE end only needs A CRC check of execution, has effectively reduced processing delay, has improved the efficient of blind check verification.
Description of drawings
Fig. 1 is a schematic flow sheet of blind check method of calibration in the embodiment of the invention;
Fig. 2 is a signaling process figure of blind check method of calibration in the embodiment of the invention;
Fig. 3 is the structural representation of CRC check circuit in the embodiment of the invention;
Fig. 4 is another schematic flow sheet of blind check method of calibration in the embodiment of the invention;
Fig. 5 is a structural representation of blind check calibration equipment in the embodiment of the invention;
Fig. 6 is another structural representation of blind check calibration equipment in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of blind check method of calibration and relevant apparatus, is used for finishing rapidly the blind check verification of Downlink Control Information.
See also Fig. 1, the blind check method of inspection embodiment comprises in the embodiment of the invention:
101, UE end obtains the N position Downlink Control Information after the decoding;
The UE end obtains the N position Downlink Control Information after the decoding, and the concrete numerical value of N (i.e. the data length of this Downlink Control Information) is determined by the transmitting terminal of this Downlink Control Information.
Suppose that original descending control message has the K position, transmitting terminal is after encoding to the descending control message of K position, first the descending control message behind the coding is carried out CRC check, obtain the CRC check result of M position, M is the CRC check figure place, the M value depends on the number of register in the CRC check circuit, and M is the integer greater than 1, and N is greater than M; Then, the CRC check result of this M position is carried out RNTI add and cover, obtain M position RNTI and add and cover the result; At last, this M position RNTI is added after the descending control message in K position of covering after the result is appended to coding, obtain N position Downlink Control Information, this N position Downlink Control Information is mapped on the interface-free resources sends; Above-mentioned K and M be positive integer all, and K+M=N.
The UE end is deciphered the N position Downlink Control Information after obtaining deciphering in the position at this Downlink Control Information place, N position of search, search volume that calculates to the N position Downlink Control Information of this position.
102, the UE end subtracts M position Downlink Control Information to N and carries out CRC check;
The UE end subtracts M position Downlink Control Information to N and carries out CRC check, obtains M position CRC check result, and M is the CRC check figure place, and is the positive integer less than N.
The method of above-mentioned CRC check is consistent with the CRC check of transmitting terminal, in actual applications, transmitting terminal can send to receiving terminal with the form of concrete CRC check method by message transfer, also can be when default CRC check method, the CRC check method of transmitting terminal and UE end is preset as identical, concrete implementation to be not construed as limiting herein.
In embodiments of the present invention, when carrying out CRC check, remove first the CRC check position of this Downlink Control Information (because the CRC check of UE end and transmitting terminal is consistent, therefore also can know the length of CRC check position), cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can obtain the M position CRC check result that former K (being that N subtracts M) Downlink Control Information carries out at transmitting terminal obtaining after the CRC check.
103, UE end carries out RNTI to M position CRC check result and adds and cover;
UE end carries out RNTI to M position CRC check result and adds and cover, and obtains M position RNTI and adds and cover the result.
The RNTI of UE end adds the method for covering, and to add the method for covering with the employed RNTI of above-mentioned transmitting terminal also be identical.
104, UE end adds the last M position of covering in result and the N position Downlink Control Information with M position RNTI and compares.
Compare in the last M position that UE end adds M position RNTI in the N position Downlink Control Information of covering after result and the above-mentioned decoding, if identical, then blind check success, if not identical, then blind check is unsuccessfully.
Because M obtained above position CRC check result is consistent with the M position CRC check result that transmitting terminal obtains, as long as copying transmitting terminal to carry out RNTI adds the processing procedure of covering and M position CRC check result is added covers, the M position RNTI that obtains adds the RNTI that covers result and transmitting terminal and adds that to cover the result also can be identical, and the RNTI of transmitting terminal adds and covers the result and append after the descending control message in K position, it is the last M position in the Downlink Control Information of N position, therefore, as long as the decoding of UE end does not make mistakes, and correct Downlink Control Information has been arrived in the blind check of UE end, and then to add the last M position in the N position Downlink Control Information after covering the result and deciphering be identical to M position RNTI certainly.
The present invention is when carrying out CRC check to Downlink Control Information, remove first the CRC check position (Downlink Control Information that namely only N is subtracted the M position carries out CRC check) of this Downlink Control Information, cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can finish the blind check verification.Because UE end carries out first CRC check, carry out again the RNTI solution and cover, then in the situation that need to carry out the blind check verification to A blind check result, the UE end only needs A CRC check of execution, has effectively reduced processing delay, has improved the efficient of blind check verification.
The below is described blind check method of calibration of the present invention to the UE end from the transmitting terminal of Downlink Control Information, and another embodiment of the blind check method of inspection comprises in the embodiment of the invention:
201, transmitting terminal is determined the position of Downlink Control Information place CCE resource;
Then the polymerization rank (L) that needs adopted when transmitting terminal was determined the transmission of Downlink Control Information according to the resource operating position goes out the position of Downlink Control Information place CCE resource according to RNTI value and subframe numbers information calculations.
202, transmitting terminal is encoded successively to Downlink Control Information;
After the position of determining above-mentioned Downlink Control Information place CCE resource, transmitting terminal is determined chance numbering m according to the operating position of current resource again; Transmitting terminal is encoded and rate-matched to Downlink Control Information successively according to above-mentioned polymerization rank L and chance numbering m again, has obtained carrying the data flow of K position Downlink Control Information.
203, transmitting terminal carries out CRC check to Downlink Control Information;
Transmitting terminal carries out CRC check to the Downlink Control Information of above-mentioned K position, obtains the CRC check result of M position, and M is the CRC check figure place, and K and M are all positive integer.
Suppose that the K value is 57, the CRC check position of determining is 16, and the generator polynomial of 16 CRC check circuit is: g
CRC16(D)=[D
16+ D
12+ D
5+ 1] for a CRC length L=16
Fig. 3 in the corresponding embodiment of the invention of above-mentioned multinomial, above-mentioned length L is the polymerization rank, the D in the above-mentioned formula is the time-delay beat of input, as: D
1616 beats of expression time-delay;
Transmitting terminal is as follows to the detailed process that 57 Downlink Control Information carries out CRC check:
At first, transmitting terminal is set up 16 CRC check circuit, wherein, includes 16 registers, and from right and left, as described in Figure 3,16 registers are the D15 to D0 in the corresponding diagram respectively; In these 16 registers, place value is that the right of 1 register has an XOR circuit;
Then, the Far Left of above-mentioned 57 Downlink Control Information from Fig. 3 enters the CRC check circuit, every next bit, and when every next bit entered, the bit in the register moved to right one.Enter next bit through behind the XOR of XOR circuit; Rightmost register sends bit to each XOR circuit, as second operand; Register is zero entirely when initial, and the Downlink Control Information that enters finishes to the register that enters last from primary register, and the content in 16 bit registers is 16 CRC check results of 57 Downlink Control Information at this moment.
The above only is illustrated the application scenarios in the embodiment of the invention with some examples, is understandable that, in actual applications, more application scenarios can also be arranged, and specifically is not construed as limiting herein.
204, transmitting terminal carries out RNTI to the CRC check result and adds and cover;
Transmitting terminal carries out RNTI to the CRC check result of above-mentioned M position and adds and cover, and the RNTI of M position added covers the result and append after the Downlink Control Information behind the coding of above-mentioned K position, obtains the Downlink Control Information of N (K+M=N) position.
205, transmitting terminal sends the Downlink Control Information of N position to the UE end;
Transmitting terminal is modulated above-mentioned N position Downlink Control Information and resource mapping, and the N position Downlink Control Information after processing is mapped on the interface-free resources, sends to the UE end.
206, the UE end is at interface-free resources search N position Downlink Control Information;
The UE end calculates the search volume of Downlink Control Information in PDCCH, above-mentioned N position according to current RNTI value, and the UE end is searched for this N position Downlink Control Information (being the blind check process) according to the search volume that calculates again.
207, the UE end is deciphered N position Downlink Control Information;
The UE end is deciphered the N position Downlink Control Information after obtaining deciphering to the above-mentioned N position Downlink Control Information that searches.
208, the UE end subtracts M position Downlink Control Information to N and carries out CRC check;
The CRC check circuit of UE end use transmitting terminal subtracts M position Downlink Control Information to N and carries out CRC check, obtains M position CRC check result.
In embodiments of the present invention, when carrying out CRC check, remove first the CRC check position of this Downlink Control Information (because the CRC check of UE end and transmitting terminal is consistent, therefore also can know the length of CRC check position), cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can obtain the M position CRC check result that former K (being that N subtracts M) Downlink Control Information carries out at transmitting terminal obtaining after the CRC check.
209, UE end carries out RNTI to M position CRC check result and adds and cover;
UE end carries out RNTI to M position CRC check result and adds and cover, and obtains M position RNTI and adds and cover the result.
The RNTI of UE end adds the method for covering, and to add the method for covering with the employed RNTI of above-mentioned transmitting terminal also be identical.
210, UE end adds the last M position of covering in result and the N position Downlink Control Information with M position RNTI and compares.
Compare in the last M position that UE end adds M position RNTI in the N position Downlink Control Information of covering after result and the above-mentioned decoding, if identical, then blind check success, if not identical, then blind check is unsuccessfully.
In above-described embodiment, what the UE end contrasted in the blind check verification is that transmitting terminal adds the CRC check position after covering, and in actual applications, the UE end also can contrast the CRC check position that adds before covering, can realize equally the blind check verification of Downlink Control Information, see also Fig. 4, another embodiment of the blind check method of inspection comprises in the embodiment of the invention:
401, UE end obtains the N position Downlink Control Information after the decoding;
The UE end obtains the N position Downlink Control Information after the decoding, and the concrete numerical value of N is determined by the transmitting terminal of this Downlink Control Information.
Suppose that original descending control message has the K position, transmitting terminal is after encoding to the descending control message of K position, first the descending control message behind the coding is carried out CRC check, obtain the CRC check result of M position, M is the CRC check figure place, the M value depends on the number of register in the CRC check circuit, and M is the integer greater than 1, and N is greater than M; Then, the CRC check result of this M position is carried out RNTI add and cover, obtain M position RNTI and add and cover the result; At last, this M position RNTI is added after the descending control message in K position of covering after the result is appended to coding, obtain N position Downlink Control Information, this N position Downlink Control Information is mapped on the interface-free resources sends; Above-mentioned K and M be positive integer all, and K+M=N.
The UE end is deciphered the N position Downlink Control Information after obtaining deciphering in the position at this Downlink Control Information place, N position of search, search volume that calculates to the N position Downlink Control Information of this position.
402, the UE end subtracts M position Downlink Control Information to N and carries out CRC check;
The UE end subtracts M position Downlink Control Information to N and carries out CRC check, obtains M position CRC check result, and M is the CRC check figure place, and is the positive integer less than N.
The method of above-mentioned CRC check is consistent with the CRC check of transmitting terminal, in actual applications, transmitting terminal can send to transmitting terminal with the form of concrete CRC check method by message transfer, also can be when default CRC check method, the CRC check method of transmitting terminal and UE end is preset as identical, concrete implementation to be not construed as limiting herein.
To N subtract M position Downlink Control Information carry out CRC check detailed process can for:
The checking circuit that foundation is comprised of M register, the initial value of this M register is 0; Above-mentioned N is subtracted M position Downlink Control Information inputs successively described checking circuit, after this N subtracts M position Downlink Control Information and passes through the processing of CRC check circuit fully, with the currency in this M register as M position CRC check result.
In embodiments of the present invention, when carrying out CRC check, remove first the CRC check position of this Downlink Control Information, cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can obtain former K position Downlink Control Information and carry out the M position CRC check result that obtains after the CRC check at transmitting terminal.
403, the last M position in the Downlink Control Information of UE end N position is carried out the RNTI solution and is covered;
The UE end carries out the RNTI solution to the last M position in the Downlink Control Information of above-mentioned N position to be covered, and obtains M position RNTI solution and covers the result.
Because transmitting terminal is that the M position CRC check result who will add after covering appends after the descending control message of K position, therefore directly the last M position in the Downlink Control Information of above-mentioned N position is carried out after the RNTI solution covers, can obtains transmitting terminal and add M position CRC check result before covering.
404, UE end is covered the result with M position RNTI solution and M position CRC check result compares.
The M position RNTI solution that UE end obtains step 403 is covered the result and is compared with the M position CRC check result that step 402 obtains, if identical, then blind check success, if not identical, then blind check is unsuccessfully.
N after the UE end is to decoding subtracts M position Downlink Control Information and carries out CRC check, with respect at transmitting terminal original K position Downlink Control Information being carried out CRC check, the M position CRC check that obtains also is consistent, therefore, directly M position RNTI solution is covered the result and M position CRC check result compares, also can realize the blind check verification of Downlink Control Information, simultaneously, can not produce again owing to being that Downlink Control Information carries out solution and covers a large amount of processing delay that cause to the N of integral body first.
The below describes the embodiment for the blind check calibration equipment of the present invention of carrying out above-mentioned blind check method of calibration, and its logical construction please refer to Fig. 5, and the blind check calibration equipment embodiment comprises in the embodiment of the invention:
Acquiring unit 501 is used for obtaining the N position Downlink Control Information after the decoding;
Verification unit 502 is used for that N is subtracted M position Downlink Control Information and carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result, and M is the integer greater than 1, and N is greater than M;
Add and cover unit 503, be used for that M position CRC check result is carried out Radio Network Temporary Identifier RNTI and add and cover, obtain M position RNTI and add and cover the result;
Contrast unit 504 is used for that above-mentioned M position RNTI is added the last M position of covering result and above-mentioned N position Downlink Control Information and compares, if identical, then blind check success, if not identical, then blind check failure.
Verification unit 502 in the embodiment of the invention can comprise:
Circuit is set up module 5021, is used for setting up the checking circuit that is comprised of M register, and the initial value of this M register is 0;
Input validation module 5022 is used for that N is subtracted M position Downlink Control Information and inputs successively above-mentioned checking circuit, after this N subtracts M position Downlink Control Information and passes through the processing of this checking circuit fully, with the currency of M register as M position CRC check result.
The concrete reciprocal process of unit is as follows in the embodiment of the invention blind check calibration equipment:
Acquiring unit 501 obtains the N position Downlink Control Information after the decoding, and the concrete numerical value of N (i.e. the data length of this Downlink Control Information) is determined by the transmitting terminal of this Downlink Control Information.
502 couples of N of verification unit subtract M position Downlink Control Information and carry out CRC check, obtain M position CRC check result, and M is the CRC check figure place, and are the positive integer less than N.
The method of above-mentioned CRC check is consistent with the CRC check of transmitting terminal, in actual applications, transmitting terminal can send to transmitting terminal with the form of concrete CRC check method by message transfer, also can be when default CRC check method, the CRC check method of transmitting terminal and UE end is preset as identical, concrete implementation to be not construed as limiting herein.In embodiments of the present invention, when carrying out CRC check, remove first the CRC check position of this Downlink Control Information (because the CRC check of UE end and transmitting terminal is consistent, therefore also can know the length of CRC check position), cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can obtain the M position CRC check result that former K (being that N subtracts M) Downlink Control Information carries out at transmitting terminal obtaining after the CRC check.
502 couples of N of verification unit subtract M position Downlink Control Information and carry out CRC check and specifically can comprise: circuit is set up module 5021 and is set up the checking circuit that is comprised of M register, and the initial value of M register is 0; Then input validation module 5022 subtracts M position Downlink Control Information with N and inputs successively above-mentioned checking circuit, after this N subtracts M position Downlink Control Information and passes through the processing of this checking circuit fully, with the currency of M register as M position CRC check result.
After obtaining M position CRC check result, add and cover 503 pairs of M positions, unit CRC check result and carry out RNTI and add and cover, obtain M position RNTI and add and cover the result, the RNTI of UE end adds the method for covering and the employed RNTI of transmitting terminal, and to add the method for covering identical.At last, compare in the last M position that contrast unit 504 adds M position RNTI in the N position Downlink Control Information of covering after result and the above-mentioned decoding, if identical, then blind check success, if not identical, then blind check is unsuccessfully.
Because M obtained above position CRC check result is consistent with the M position CRC check result that transmitting terminal obtains, as long as copying transmitting terminal to carry out RNTI adds the processing procedure of covering and M position CRC check result is added covers, the M position RNTI that obtains adds the RNTI that covers result and transmitting terminal and adds that to cover the result also can be identical, and the RNTI of transmitting terminal adds and covers the result and append after the descending control message in K position, it is the last M position in the Downlink Control Information of N position, therefore, as long as the decoding of UE end does not make mistakes, and correct Downlink Control Information has been arrived in the blind check of UE end, and then to add the last M position in the N position Downlink Control Information after covering the result and deciphering be identical to M position RNTI certainly.
Please refer to Fig. 6, another embodiment of blind check calibration equipment comprises in the embodiment of the invention:
Acquiring unit 601 is used for obtaining the N position Downlink Control Information after the decoding;
Solution is covered unit 603, is used for that the RNTI solution is carried out in the last M position of above-mentioned N position Downlink Control Information and covers, and obtains M position RNTI solution and covers the result;
Blind check judging unit 604 is used for that above-mentioned M position RNTI solution is covered the result and M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
Verification unit in the embodiment of the invention can comprise:
Circuit is set up module 6021, is used for setting up the checking circuit that is comprised of M register, and the initial value of this M register is 0;
The concrete reciprocal process of unit is as follows in the embodiment of the invention blind check calibration equipment:
Acquiring unit 601 obtains the N position Downlink Control Information after the decoding, and the concrete numerical value of N (i.e. the data length of this Downlink Control Information) is determined by the transmitting terminal of this Downlink Control Information.
602 couples of N of verification unit subtract M position Downlink Control Information and carry out CRC check, obtain M position CRC check result, and M is the CRC check figure place, and are the positive integer less than N.
The method of above-mentioned CRC check is consistent with the CRC check of transmitting terminal, in actual applications, transmitting terminal can send to transmitting terminal with the form of concrete CRC check method by message transfer, also can be when default CRC check method, the CRC check method of transmitting terminal and UE end is preset as identical, concrete implementation to be not construed as limiting herein.In embodiments of the present invention, when carrying out CRC check, remove first the CRC check position of this Downlink Control Information (because the CRC check of UE end and transmitting terminal is consistent, therefore also can know the length of CRC check position), cover so that in the process of blind check verification, need not to carry out first the RNTI solution, also can obtain the M position CRC check result that former K (being that N subtracts M) Downlink Control Information carries out at transmitting terminal obtaining after the CRC check.Circuit is set up the identical of module 5021 and input validation module 5022 among the specific implementation function that circuit is set up module 6021 and input validation module 6022 and the above-mentioned Fig. 5 embodiment, repeats no more herein.
Solution is covered last M position in the Downlink Control Information of 603 couples of above-mentioned N position, unit and is carried out the RNTI solution and cover, and obtains M position RNTI solution and covers the result.Because transmitting terminal is that the M position CRC check result who will add after covering appends after the descending control message of K position, therefore directly the last M position in the Downlink Control Information of above-mentioned N position is carried out after the RNTI solution covers, can obtains transmitting terminal and add M position CRC check result before covering.
Obtaining after M position RNTI solution covers result and M position CRC check result, this M position RNTI solution is covered the result to blind check judging unit 604 and M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
N after the UE end is to decoding subtracts M position Downlink Control Information and carries out CRC check, with respect at transmitting terminal original K position Downlink Control Information being carried out CRC check, the M position CRC check that obtains also is consistent, therefore, directly M position RNTI solution is covered the result and M position CRC check result compares, also can realize the blind check verification of Downlink Control Information.
In several embodiment that the application provides, should be understood that disclosed apparatus and method can realize by another way.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of unit to realize the purpose of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics of unit exists, and also can be integrated in the unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, also can adopt the form of SFU software functional unit to realize.
If described integrated unit is realized with the form of SFU software functional unit and during as independently production marketing or use, can be stored in the computer read/write memory medium.Based on such understanding, part or all or part of of this technical scheme that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), the various media that can be program code stored such as random access memory (RAM, Random Access Memory), magnetic disc or CD.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (9)
1. a blind check method of calibration is characterized in that, comprising:
Obtain the N position Downlink Control Information after the decoding;
N is subtracted M position Downlink Control Information carry out the cyclic redundancy check (CRC) code CRC check, obtain M position CRC check result, described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M;
Described M position CRC check result is carried out Radio Network Temporary Identifier RNTI add and cover, obtain M position RNTI and add and cover the result;
Described M position RNTI is added the last M position of covering in result and the described N position Downlink Control Information compare, if identical, then blind check success, if not identical, then blind check failure.
2. method according to claim 1 is characterized in that, describedly N is subtracted M position Downlink Control Information carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result's process, comprising:
The checking circuit that foundation is comprised of M register, the initial value of a described M register is 0;
Described N is subtracted M position Downlink Control Information inputs successively described checking circuit, after described N subtracts M position Downlink Control Information and passes through the processing of described checking circuit fully, with the currency of a described M register as M position CRC check result.
3. method according to claim 1 and 2 is characterized in that, described M is 16.
4. a blind check method of calibration is characterized in that, comprising:
Obtain the N position Downlink Control Information after the decoding;
N is subtracted M position Downlink Control Information carry out the cyclic redundancy check (CRC) code CRC check, obtain M position CRC check result, described M is the CRC check figure place, and described M is greater than 1 integer, and described N is greater than M;
The RNTI solution is carried out in last M position in the Downlink Control Information of described N position cover, obtain M position RNTI solution and cover the result;
Described M position RNTI solution is covered the result and described M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
5. method according to claim 4 is characterized in that, describedly N is subtracted M position Downlink Control Information carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result's process, comprising:
The checking circuit that foundation is comprised of M register, the initial value of a described M register is 0;
Described N is subtracted M position Downlink Control Information inputs successively described checking circuit, after described N subtracts M position Downlink Control Information and passes through the processing of described checking circuit fully, with the currency of a described M register as M position CRC check result.
6. a blind check calibration equipment is characterized in that, comprising:
Acquiring unit is used for obtaining the N position Downlink Control Information after the decoding;
Verification unit is used for that N is subtracted M position Downlink Control Information and carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result, and described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M;
Add and cover the unit, be used for that described M position CRC check result is carried out Radio Network Temporary Identifier RNTI and add and cover, obtain M position RNTI and add and cover the result;
The contrast unit is used for that described M position RNTI is added the last M position of covering result and described N position Downlink Control Information and compares, if identical, then blind check success, if not identical, then blind check failure.
7. device according to claim 6 is characterized in that, described verification unit comprises:
Circuit is set up module, is used for setting up the checking circuit that is comprised of M register, and the initial value of a described M register is 0;
The input validation module is used for that described N is subtracted M position Downlink Control Information and inputs successively described checking circuit, after described N subtracts M position Downlink Control Information and passes through the processing of described checking circuit fully, with the currency of a described M register as M position CRC check result.
8. a blind check calibration equipment is characterized in that, comprising:
Acquiring unit is used for obtaining the N position Downlink Control Information after the decoding;
Verification unit is used for that N is subtracted M position Downlink Control Information and carries out the cyclic redundancy check (CRC) code CRC check, obtains M position CRC check result, and described M is the CRC check figure place, and described M is the integer greater than 1, and described N is greater than M;
Solution is covered the unit, is used for that the RNTI solution is carried out in the last M position of described N position Downlink Control Information and covers, and obtains M position RNTI solution and covers the result;
The blind check judging unit is used for that described M position RNTI solution is covered the result and described M position CRC check result compares, if identical, then blind check success, if not identical, then blind check failure.
9. device according to claim 8 is characterized in that, described verification unit comprises:
Circuit is set up module, is used for setting up the checking circuit that is comprised of M register, and the initial value of a described M register is 0;
The input validation module is used for that described N is subtracted M position Downlink Control Information and inputs successively described checking circuit, after described N subtracts M position Downlink Control Information and passes through the processing of described checking circuit fully, with the currency of a described M register as M position CRC check result.
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