CN115567168B

CN115567168B - PDCCH blind detection implementation method and device and electronic equipment

Info

Publication number: CN115567168B
Application number: CN202211553492.8A
Authority: CN
Inventors: 陈美玲; 刘晓燕; 周建红; 郑辰
Original assignee: Beijing Lanstar Technology Co ltd
Current assignee: Beijing Lanstar Technology Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-03-24
Anticipated expiration: 2042-12-06
Also published as: CN115567168A

Abstract

The invention provides a method, a device and electronic equipment for realizing PDCCH blind detection, which relate to the technical field of wireless communication, and the method comprises the following steps: the terminal carries out repeated arrangement processing on the corresponding decoding sequence aiming at any target PDCCH candidate set in the plurality of sets of PDCCH candidate sets to obtain corresponding Viterbi decoding input data; inputting the Viterbi decoding input data into a Viterbi decoder, and determining a corresponding maximum path metric value; backtracking and decoding from the state of the maximum path metric value to obtain a first auxiliary bit sequence and a second auxiliary bit sequence; determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value; and determining the RNTI of the terminal according to the decoding result of each group of PDCCH candidate sets, and completing the blind test of the PDCCH. The accuracy of judging the decoding result of the PDCCH candidate set is improved, the screening of the false detection is facilitated, and the detection omission is prevented.

Description

PDCCH blind detection implementation method and device and electronic equipment

Technical Field

The invention relates to the technical field of wireless communication, in particular to a method and a device for realizing PDCCH blind detection and electronic equipment.

Background

In a Long Term Evolution (LTE) communication system, a Physical Downlink Control Channel (PDCCH) is mainly used for carrying Downlink Control Information (DCI) for uplink and Downlink scheduling, and a terminal (also called User Equipment, UE) obtains resource allocation Information by decoding the DCI in the PDCCH. After the DCI code stream is generated, 16-bit Cyclic Redundancy Check (CRC) bits are attached, the CRC bits are scrambled by using Radio Network Temporary Identity (RNTI), and then the DCI code stream attached with the CRC carries out channel coding through tail biting convolutional codes; the processing at the receiving end is the reverse process of the transmitting end.

The PDCCH of the LTE system may be configured with 4 aggregation levels of 1, 2, 4, and 8, and since the UE does not know which aggregation level the received PDCCH uses, the UE may try all possibilities once, that is, PDCCH blind check, and correct DCI information may be obtained through PDCCH blind check. When the RNTI is known, DCI information sent to the UE can be obtained for a UE specific to a certain RNTI through DCI blind detection. However, for some communication systems, the RNTI is unknown, and the UE needs to resolve all PDCCHs without knowing the RNTI.

In contrast, in the conventional PDCCH blind test technical scheme, a UE receiving end selects a maximum value of a Metric value according to a path Metric value Metric calculated by viterbi decoding of each set of PDCCH candidate sets, compares the maximum value with a preset path Metric threshold, and determines that the viterbi decoding can be correctly decoded if the maximum value of the Metric is greater than the path Metric threshold, or determines that the decoding is wrong otherwise. If the decoding is judged to be correct through Metric, the RNTI of the target user can be further obtained, and the resource position of the PDCCH candidate set is calculated according to the RNTI. However, the accuracy of the decoding result judged by the scheme depends on the selection of the path metric threshold, for example, if the path metric threshold is selected too low, the false detection of PDCCH blind detection is easily increased; if the path metric threshold is selected too high, the missed detection of the PDCCH blind detection may be increased.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method, a device and electronic equipment for realizing PDCCH blind detection.

In a first aspect, the present invention provides a method for implementing PDCCH blind detection, which is applied to a terminal and includes:

aiming at any target PDCCH candidate set in a plurality of sets of PDCCH candidate sets, carrying out repeated arrangement processing on decoding sequences corresponding to the target PDCCH candidate sets to obtain Viterbi decoding input data corresponding to the target PDCCH candidate sets;

inputting the Viterbi decoding input data into a Viterbi decoder, and determining a maximum path metric value corresponding to the Viterbi decoding input data;

backtracking and decoding from the state of the maximum path metric value to obtain a first auxiliary bit sequence and a second auxiliary bit sequence; the first auxiliary bit sequence comprises m hard decision bits obtained by decoding data from the m bit to the 1 st bit of a first repeated sequence, the second auxiliary bit sequence comprises m hard decision bits obtained by decoding data from the m bit to the 1 st bit of the decoded sequence, the first repeated sequence is the 1 st repeated sequence of the decoded sequence, and m is a positive integer;

determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value;

and determining the Radio Network Temporary Identifier (RNTI) of the terminal according to the decoding result of each group of PDCCH candidate sets, and completing the blind test of the PDCCH.

Optionally, the determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value includes:

carrying out XOR operation on bits at corresponding positions in the first auxiliary bit sequence and the second auxiliary bit sequence to obtain XOR operation results of m auxiliary bits;

determining a measurement judgment sign according to a comparison result between the maximum path metric value and a path metric threshold;

and determining a decoding result of the target PDCCH candidate set according to the XOR operation result of the m auxiliary bits and the metric judgment mark.

Optionally, the determining a metric determination flag according to a comparison result between the maximum path metric value and a path metric threshold includes:

under the condition that the maximum path metric value is greater than a path metric threshold, determining a metric judgment flag to be 0;

and under the condition that the maximum path metric value is less than or equal to a path metric threshold, determining that a metric judgment flag is 1.

Optionally, the determining a decoding result of the target PDCCH candidate set according to the xor operation result of the m auxiliary bits and the metric determination flag includes:

and performing OR operation on the XOR operation result of the m auxiliary bits and the metric judgment flag, and determining a decoding result of the target PDCCH candidate set according to the operation result.

Optionally, the determining, according to the operation result, a decoding result of the target PDCCH candidate set includes:

determining that the target PDCCH candidate set is decoded correctly when the operation result is 0;

and determining the decoding error of the target PDCCH candidate set when the operation result is 1.

Optionally, m is an integer greater than or equal to 5 and less than or equal to 9.

Optionally, the method further comprises:

and under the condition that the decoding of the target PDCCH candidate set is determined to be correct, acquiring a decoded hard decision bit sequence corresponding to the target PDCCH candidate set.

In a second aspect, the present invention further provides an apparatus for implementing PDCCH blind detection, which is applied to a terminal, and includes:

the repeated arrangement module is used for carrying out repeated arrangement processing on a decoding sequence corresponding to the target PDCCH candidate set aiming at any target PDCCH candidate set in the plurality of sets of PDCCH candidate sets to obtain Viterbi decoding input data corresponding to the target PDCCH candidate set;

a first determining module, configured to input the viterbi-decoded input data into a viterbi decoder, and determine a maximum path metric corresponding to the viterbi-decoded input data;

an obtaining module, configured to perform backtracking and decoding processing from a state where the maximum path metric value is located, and obtain a first auxiliary bit sequence and a second auxiliary bit sequence; the first auxiliary bit sequence comprises m hard decision bits obtained by decoding data from the m bit to the 1 st bit of a first repeated sequence, the second auxiliary bit sequence comprises m hard decision bits obtained by decoding data from the m bit to the 1 st bit of the decoded sequence, the first repeated sequence is the 1 st repeated sequence of the decoded sequence, and m is a positive integer;

a second determining module, configured to determine a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value;

and the third determining module is used for determining the radio network temporary identifier RNTI of the terminal according to the decoding result of each group of PDCCH candidate sets and completing the blind detection of the PDCCH.

In a third aspect, the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the PDCCH blind detection implementation method according to the first aspect is implemented.

In a fourth aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for implementing PDCCH blind detection according to the first aspect.

According to the method, the device and the electronic equipment for realizing the PDCCH blind test, the repeated arrangement processing is carried out on any target PDCCH candidate set in the plurality of sets of PDCCH candidate sets, the obtained data is input into a Viterbi decoder to obtain the corresponding maximum path metric value, the backtracking and decoding processing is carried out from the state of the maximum path metric value to obtain the first auxiliary bit sequence and the second auxiliary bit sequence, the decoding result of the target PDCCH candidate set is obtained based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value, the RNTI of the terminal is determined according to the decoding result of each set of PDCCH candidate sets, the PDCCH blind test is completed, the accuracy of the decoding result of the PDCCH candidate set is improved, the screening of the false tests is facilitated, and the missing test is prevented.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating a PDCCH blind detection implementation method provided by the present invention;

FIG. 2 is a schematic diagram of a Viterbi decoded input data provided by the present invention;

FIG. 3 is a schematic flow chart of the auxiliary bit acquisition provided by the present invention;

FIG. 4 is a schematic diagram illustrating a process of determining a decoding result of a PDCCH candidate set according to the present invention;

fig. 5 is a schematic structural diagram of a PDCCH blind detection implementation apparatus provided in the present invention;

fig. 6 is a schematic structural diagram of an electronic device provided in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an LTE communication system, a downlink control channel PDCCH is mainly used to carry downlink control information DCI for uplink and downlink scheduling, and a UE obtains the DCI by decoding the PDCCH to acquire resource allocation information. After the DCI code stream is generated, 16-bit CRC bits are attached, the CRC bits are scrambled by using a Radio Network Temporary Identifier (RNTI), and then the DCI code stream attached with the CRC is subjected to channel coding by a tail biting convolutional code. The processing at the receiving end is the reverse process of the transmitting end.

The PDCCH of the LTE system may be configured with 4 aggregation levels of 1, 2, 4, and 8, and since the UE does not know which aggregation level the received PDCCH uses, the UE may try all possibilities once, that is, PDCCH blind detection, and correct DCI information may be obtained through PDCCH blind detection. And during PDCCH blind detection, the UE determines the search space of the UE, calculates the required DCI bit length according to the system configuration, performs Viterbi decoding on each candidate set, and finally judges the decoding correctness through CRC.

And scrambling 16-bit CRC check bits of the PDCCH by using the RNTI, and under the condition that the RNTI is known, obtaining DCI information sent to the UE aiming at a certain RNTI specific UE through DCI blind detection.

However, for some communication systems, the RNTI is unknown, and the UE needs to resolve all PDCCHs without knowing the RNTI. In this case, since the RNTI is limited in that the correct 16-bit CRC check bits cannot be recovered by descrambling, the conventional method of determining the decoding result using the CRC is not applicable when the RNTI is unknown.

Under the condition of unknown RNTI, the prior art mainly adopts the following PDCCH blind detection technical scheme:

and the UE receiving end selects the maximum value of the Metric value according to the path Metric value Metric calculated by the Viterbi decoding of each group of PDCCH candidate sets, compares the maximum value with a preset path Metric threshold, judges that the Viterbi decoding can be correctly decoded if the maximum value of the Metric is greater than the path Metric threshold, and otherwise judges that the decoding is wrong.

If the decoding is judged to be correct through Metric, the RNTI of the target user can be further obtained. The method in the prior art comprises the following steps: and performing CRC coding on the hard decision bits of the DCI bit sequence output by the Viterbi decoder to generate 16-bit CRC check bits, and performing modulo-2 addition on the 16-bit CRC check bits and the 16-bit CRC check bits scrambled by the RNTI in the hard decision bits output by the decoder according to bits to restore the value of the RNTI. After the RNTI of the target user is obtained, the resource location of the PDCCH candidate set can be calculated according to the RNTI.

The aforementioned prior art, while viable, has the following drawbacks: if the path metric threshold is selected too low, virtual detection of PDCCH blind detection is easily increased; if the path metric threshold is selected too high, the missed detection of the PDCCH blind detection may be increased.

The invention selects a plurality of hard decision bits at the same position in 2 groups of adjacent repeated code words as auxiliary bits by introducing a decoding result judgment function based on the characteristic that the same code word is possibly repeated in the Viterbi decoding of the tail-biting convolutional code, compares the bits at the same position in the 2 groups of auxiliary bits, compares the positive error state of the maximum value of the path metric and the threshold value of the path metric in the current decoding if the comparison result is all correct, and judges that the decoding result is correct under the condition that the 2 comparison results are all correct.

Aiming at the problems, the invention provides a realization scheme of PDCCH blind detection, which is used for improving the judgment effect of a decoding result through auxiliary bits when LTE terminal equipment carries out PDCCH blind detection under the condition of unknown RNTI, effectively reducing the virtual detection during PDCCH blind detection and being beneficial to preventing correct downlink control information DCI from being missed.

Fig. 1 is a schematic flow chart of a PDCCH blind detection implementation method provided by the present invention, where the method is applied to a terminal, and as shown in fig. 1, the method includes the following steps:

step 100, aiming at any target PDCCH candidate set in the plurality of sets of PDCCH candidate sets, carrying out repeated arrangement processing on decoding sequences corresponding to the target PDCCH candidate set to obtain Viterbi decoding input data corresponding to the target PDCCH candidate set.

Specifically, the target PDCCH candidate set is any PDCCH candidate set in multiple sets of PDCCH candidate sets corresponding to PDCCH blind detection, and is not limited herein.

After the terminal performs rate de-matching on the target PDCCH candidate set, a corresponding decoding sequence (Din) can be obtained, wherein the Din has the length of L and comprises data in the sequence of 1 to L; the data in Din is soft information with a signed number, wherein each data bit contains spliced data of 3 branches, namely 1 bit of information bit and 2 bits of check bit.

Specifically, fig. 2 is a schematic structural diagram of viterbi decoding input data provided by the present invention, as shown in fig. 2, din is repeated 1 time to generate a first repeated sequence (Drep), drep also includes the same data in Din with the order of 1 to L bits, din and Drep are combined according to the order of arranging Din first and then arranging Drep, if the input data length of the viterbi decoder has not been reached, din data is repeated several times after the combined data of Din and Drep until the expected decoder input data length is reached, so as to obtain viterbi decoding input data corresponding to the target PDCCH candidate set.

Step 101, inputting the viterbi-decoded input data into a viterbi decoder, and determining a maximum path metric value corresponding to the viterbi-decoded input data.

Specifically, after obtaining viterbi decoding input data corresponding to the target PDCCH candidate set, the viterbi decoding input data may be input to a viterbi decoder, viterbi decoding is performed using tail-biting convolutional codes, branch path metric calculation of 64 states of each data bit in the trellis diagram is performed in an order of several sets of repeated sequences including Drep from the first data bit of Din, and when the length of the input data is reached, the maximum path metric value corresponding to the viterbi decoding input data is obtained through comparison operation for the last bit data in the corresponding 64 states.

102, backtracking and decoding from the state of the maximum path metric value to obtain a first auxiliary bit sequence and a second auxiliary bit sequence; the first auxiliary bit sequence comprises m hard decision bits obtained by decoding the data from the m bit to the 1 st bit of the first repeated sequence, the second auxiliary bit sequence comprises m hard decision bits obtained by decoding the data from the m bit to the 1 st bit of the decoding sequence, the first repeated sequence is the 1 st repeated sequence of the decoding sequence, and m is a positive integer.

Specifically, fig. 3 is a schematic flow chart of auxiliary bit acquisition, as shown in fig. 3, after determining a maximum path metric value, each data bit may be subjected to backtracking processing from a state where the maximum path metric value is located according to a direction opposite to the branch path metric calculation, that is, a sequential direction from back to front, the decoding of the data bit is also performed while backtracking, and a hard decision bit output value of each data bit is obtained; the processing principles of branch metric calculation, backtracking, decoding, hard decision, and the like are the prior art and are not described in detail.

When the backtracking and decoding process reaches the end of Drep, the Drep is backtracked and decoded, and the backtracking and decoding sequence of the data bits in the sequence is L, L-1, \ 8230;, 2,1, namely decoding is started from the lowest bit L in the sequence until the highest bit 1 is finished. When the trace back and decoding processing of Drep reaches the mth bit, m decoded hard decision bits are extracted from the mth bit to the 1 st bit to form a first auxiliary bit sequence. Optionally, m is an integer greater than or equal to 5 and less than or equal to 9.

After the processing of backtracking, decoding and bit extraction of Drep is finished, backtracking and decoding are carried out on Din, the sequence of backtracking and decoding of data bits is L, L-1, \ 8230;, 2,1, namely decoding is started from the lowest bit L in the sequence until the highest bit 1 is finished. When the backtracking and decoding processing of Din reaches the mth bit, m decoded hard decision bits are extracted from the mth bit to the 1 st bit to form a second auxiliary bit sequence.

Wherein the value of the hard decision bit is 0 or 1.

Alternatively, the first auxiliary bit sequence and the second auxiliary bit sequence may be stored, and as shown in fig. 3, the first auxiliary bit sequence may be stored in the B2 cache and the second auxiliary bit sequence may be stored in the B1 cache.

And 103, determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value.

Specifically, after obtaining the first auxiliary bit sequence and the second auxiliary bit sequence, the decoding result of the target PDCCH candidate set may be determined based on the first auxiliary bit sequence, the second auxiliary bit sequence, and the maximum path metric value.

For example, the bits at the same positions in the first auxiliary bit sequence and the second auxiliary bit sequence may be compared to obtain a comparison result; alternatively, the maximum path metric value may be compared to a path metric threshold to obtain another comparison result.

And finally determining the decoding result of the target PDCCH candidate set according to the two comparison results.

Optionally, determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value may include:

carrying out XOR operation on bits at corresponding positions in the first auxiliary bit sequence and the second auxiliary bit sequence to obtain XOR operation results of the m auxiliary bits;

determining a measurement judgment mark according to a comparison result between the maximum path metric value and a path metric threshold;

and determining a decoding result of the target PDCCH candidate set according to the XOR operation result of the m auxiliary bits and the measurement judgment mark.

Specifically, when comparing bits at the same position in the first auxiliary bit sequence and the second auxiliary bit sequence, the bits at corresponding positions in the first auxiliary bit sequence and the second auxiliary bit sequence may be subjected to an exclusive or operation to obtain an exclusive or operation result of m auxiliary bits.

When the maximum path metric value is compared with the path metric threshold, a corresponding metric judgment flag can be set according to the comparison result between the maximum path metric value and the path metric threshold.

Then, the decoding result of the target PDCCH candidate set can be determined according to the xor operation result of the m auxiliary bits and the metric judgment flag.

Optionally, determining the metric judgment flag according to a comparison result between the maximum path metric value and the path metric threshold may include:

under the condition that the maximum path metric value is greater than the path metric threshold, determining that a metric judgment mark is 0;

and determining the metric judgment flag to be 1 under the condition that the maximum path metric value is less than or equal to the path metric threshold.

For example, assuming that the path metric threshold value is 10, if the maximum path metric value is 11, the metric determination flag may be set to 0; if the maximum path metric value is 9 or 10, the metric determination flag may be set to 1.

Optionally, determining a decoding result of the target PDCCH candidate set according to the xor operation result of the m auxiliary bits and the metric determination flag may include:

and performing OR operation on the XOR operation result of the m auxiliary bits and the measurement judgment mark, and determining a decoding result of the target PDCCH candidate set according to the operation result.

Specifically, fig. 4 is a schematic flow diagram of PDCCH candidate set decoding result judgment provided by the present invention, and as shown in fig. 4, m auxiliary bits of hard decisions in the B1 buffer and m auxiliary bits of hard decisions in the B2 buffer are subjected to an exclusive-OR operation bit by bit in order from 1 to m to generate an exclusive-OR (XOR) operation result of the m auxiliary bits, and the exclusive-OR operation result of the m auxiliary bits is subjected to an OR (OR) operation with a metric judgment flag, and the operation result is used as a decoding result judgment flag.

Optionally, determining a decoding result of the target PDCCH candidate set according to the operation result may include:

determining that the target PDCCH candidate set is decoded correctly under the condition that the operation result is 0;

and determining a decoding error of the target PDCCH candidate set when the operation result is 1.

Specifically, it is possible to indicate that decoding is correct when the decoding result determination flag (or operation result) is 0; when the decoding result determination flag (or operation result) is 1, a decoding error is indicated.

Optionally, the method further comprises:

Specifically, when the decoding result determination flag is 0, it indicates that the decoding is correct, and the decoder may simultaneously output a decoded hard decision bit sequence corresponding to the PDCCH candidate set that is decoded correctly.

And step 104, determining the radio network temporary identifier RNTI of the terminal according to the decoding result of each group of PDCCH candidate sets, and completing the blind test of the PDCCH.

Specifically, by adopting the decoding result judgment method, the decoding results of each set of PDCCH candidate sets are judged, and when the decoding result of a certain PDCCH candidate set is determined to be correct, the terminal can perform CRC encoding on a decoded hard decision bit sequence corresponding to the PDCCH candidate set which is correctly decoded and output by a viterbi decoder to generate 16-bit CRC check bits, and perform modulo-2 addition on the 16-bit CRC check bits and 16-bit CRC check bits scrambled by RNTI in the decoded hard decision bit sequence of the PDCCH candidate set which is correctly decoded and output by the viterbi decoder according to bits to restore the value of the terminal. After obtaining the RNTI, the CRC check bits in the Viterbi decoding results of the multiple sets of PDCCH candidate sets can be descrambled according to the RNTI, the descrambled CRC check bits and the known CRC check bits of the terminal are checked, and if the check result is correct, the resource position of the DCI can be determined in the corresponding PDCCH candidate set.

The method for realizing the PDCCH blind test provided by the invention comprises the steps of repeatedly arranging any one target PDCCH candidate set in a plurality of groups of PDCCH candidate sets, inputting obtained data into a Viterbi decoder to obtain a corresponding maximum path metric value, carrying out backtracking and decoding treatment from the state of the maximum path metric value to obtain a first auxiliary bit sequence and a second auxiliary bit sequence, obtaining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value, determining the RNTI of a terminal according to the decoding result of each group of PDCCH candidate sets, and completing the PDCCH blind test, thereby improving the accuracy of judging the decoding result of the PDCCH candidate set, being beneficial to screening out false tests and preventing missing tests.

The technical effect of the PDCCH blind detection implementation method provided by the present invention is explained by simulation experiments.

In a simulation experiment, the decoding result judgment function of the PDCCH blind test realization method provided by the invention is verified by comparing the decoding results of the correct DCI and the incorrect DCI.

In simulation experiments, 1 group of correct DCIs with the length of 58 bits is selected, 2 groups of incorrect DCIs with the length of 35 bits and 73 bits are selected, and 3 groups of DCIs with the length of 16 bits comprise CRC. The 3 groups of DCIs are respectively subjected to Viterbi decoding. In the simulation experiment, the auxiliary bit size is selected to be 6 bits, namely, the value of m is 6.

The statistical result of the simulation experiment is shown in table 1, and the number of correct decoding decisions after the 6-bit data xor operation and the path metric threshold judgment are combined is counted.

TABLE 1 simulation statistics

From the simulation statistical result, the method for judging the decoding result by combining the path metric threshold value and the m auxiliary bits can improve the judgment effect of the decoding result, is beneficial to screening out false detection and prevents correct data from being missed for detection.

The PDCCH blind detection implementation apparatus provided in the present invention is described below, and the PDCCH blind detection implementation apparatus described below and the PDCCH blind detection implementation method described above may be referred to correspondingly.

Fig. 5 is a schematic structural diagram of a PDCCH blind detection implementation apparatus provided in the present invention, where the apparatus is applied to a terminal, and as shown in fig. 5, the apparatus includes:

a repeated permutation unit 500, configured to perform repeated permutation processing on a decoding sequence corresponding to a target PDCCH candidate set to obtain viterbi decoding input data corresponding to the target PDCCH candidate set, for any target PDCCH candidate set in the multiple sets of PDCCH candidate sets;

a first determining unit 501, configured to input viterbi-decoded input data into a viterbi decoder, and determine a maximum path metric value corresponding to the viterbi-decoded input data;

an obtaining unit 502, configured to perform backtracking and decoding processing from a state where the maximum path metric value is located, and obtain a first auxiliary bit sequence and a second auxiliary bit sequence; the first auxiliary bit sequence comprises m hard decision bits obtained by decoding the data from the m bit to the 1 st bit of the first repeated sequence, the second auxiliary bit sequence comprises m hard decision bits obtained by decoding the data from the m bit to the 1 st bit of the decoding sequence, the first repeated sequence is the 1 st repeated sequence of the decoding sequence, and m is a positive integer;

a second determining unit 503, configured to determine a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence, and the maximum path metric value;

a third determining unit 504, configured to determine a radio network temporary identifier RNTI of the terminal according to a decoding result of each set of PDCCH candidate sets, and complete blind detection of the PDCCH.

Optionally, determining a decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value includes:

Optionally, determining a metric judgment flag according to a comparison result between the maximum path metric value and the path metric threshold includes:

determining the measurement judgment mark as 0 under the condition that the maximum path metric value is greater than the path metric threshold;

Optionally, determining a decoding result of the target PDCCH candidate set according to the xor operation result of the m auxiliary bits and the metric determination flag includes:

and performing OR operation on the XOR operation result of the m auxiliary bits and the measurement judgment flag, and determining a decoding result of the target PDCCH candidate set according to the operation result.

Optionally, determining a decoding result of the target PDCCH candidate set according to the operation result includes:

Optionally, the obtaining unit 502 is further configured to:

It should be noted that, the apparatus provided in the present invention can implement all the method steps implemented by the method embodiments and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiments in this embodiment are omitted here.

Fig. 6 is a schematic structural diagram of an electronic device provided in the present invention, and as shown in fig. 6, the electronic device may include: a processor (processor) 610, a communication Interface (Communications Interface) 620, a memory (memory) 630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform any of the PDCCH blind detection implementations provided by the embodiments described above.

In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.

It should be noted that, the electronic device provided by the present invention can implement all the method steps implemented by the method embodiments described above, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiments in this embodiment are not repeated herein.

In another aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to execute any implementation method of PDCCH blind detection provided in the foregoing embodiments.

It should be noted that, the non-transitory computer-readable storage medium provided by the present invention can implement all the method steps implemented by the above method embodiments and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiments in this embodiment are not repeated herein.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for realizing Physical Downlink Control Channel (PDCCH) blind detection is applied to a terminal and is characterized by comprising the following steps:

2. The method of claim 1, wherein the determining the decoding result of the target PDCCH candidate set based on the first auxiliary bit sequence, the second auxiliary bit sequence and the maximum path metric value comprises:

3. The method of claim 2, wherein the determining a metric determination flag according to the comparison result between the maximum path metric value and the path metric threshold comprises:

4. The method of claim 2 or 3, wherein the determining the decoding result of the target PDCCH candidate set according to the XOR operation result of the m auxiliary bits and the metric determination flag comprises:

5. The method of claim 4, wherein the determining the decoding result of the target PDCCH candidate set according to the operation result comprises:

and if the operation result is 1, determining that the target PDCCH candidate set is decoded incorrectly.

6. The method of claim 1, wherein m is an integer greater than or equal to 5 and less than or equal to 9.

7. The method for implementing the PDCCH blind detection according to claim 1, wherein the method further comprises:

8. A device for realizing PDCCH blind detection is applied to a terminal, and is characterized by comprising:

a first determining module, configured to input the viterbi-decoded input data to a viterbi decoder, and determine a maximum path metric corresponding to the viterbi-decoded input data;

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the implementation method of PDCCH blind detection according to any one of claims 1 to 7 when executing the program.

10. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method for PDCCH blind detection according to any one of claims 1 to 7.