CN113259060B - Method and device for preventing PDCCH false detection and readable storage medium - Google Patents
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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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0039—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver other detection of signalling, e.g. detection of TFCI explicit signalling
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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
- H04L1/0045—Arrangements at the receiver end
- H04L1/0046—Code rate detection or code type detection
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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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- 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
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03312—Arrangements specific to the provision of output signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03312—Arrangements specific to the provision of output signals
- H04L25/03318—Provision of soft decisions
Abstract
The present disclosure provides a method, an apparatus and a readable access medium for preventing PDCCH false detection, including: performing hard decision on soft bit data output after performing rate de-matching on the blind detection data; decoding and cyclic redundancy check are carried out on the soft bit data, and the data passing the cyclic redundancy check are coded; comparing the coded data with the hard decision result, and calculating the ratio of different bits to soft bit data; when the ratio is judged to be greater than or equal to a preset first threshold value and the blind detection data meet a first condition, or when the ratio is smaller than the preset first threshold value and the blind detection data meet a second condition, determining different bit numbers between the bit information of the blind detection data and the bit information of the PDCCH which is successfully detected last time in the historical information; determining a difference characterization value according to different bit numbers; and determining that the PDCCH false detection is generated when the difference characterization value is judged to be larger than the second threshold value. The method and the device can prevent the PDCCH from being detected mistakenly.
Description
Technical Field
The present disclosure relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for preventing PDCCH false detection, and a readable storage medium.
Background
A Physical Downlink Control Channel (PDCCH) is mainly used to carry various Downlink Control Information (DCI), a basic unit of the PDCCH is a Control Channel Element (CCE), all User Equipments (UEs) in a cell share a CCE space, and each UE needs to perform blind detection on the CCE space to search out control information of the UE. But not all CCEs are necessarily allocated to the UE, and some CCEs may not carry any data.
On the terminal side, since it is not known which CCEs are occupied by the PDCCH belonging to the terminal, the CCEs corresponding to all possible PDCCH candidates are detected, and when the CCEs do not carry data, the terminal detects white noise completely. White noise data can also be completely decoded into a set of random numbers by a viterbi (viterbi) decoding algorithm. The Cyclic Redundancy Check (CRC) of the PDCCH is 16 bits, the white noise is decoded and CRC matched, and the probability of the CRC check being correct is 1/65536. Therefore, in the LTE system, there is a certain probability of PDCCH false detection.
The false detection of the PDCCH may cause system operation failure, sending and receiving unexpected data, and a downlink HARQ feedback error, or even cause an unpredictable error of a higher layer state, so it is necessary to avoid the false detection of the PDCCH in order to improve the robustness of the system. In order to eliminate the false detection of white noise as DCI, it is necessary to determine the decoded data and distinguish the white noise data from the normal noise-added data.
Disclosure of Invention
In view of the above, the present disclosure provides a method, an apparatus, and a readable storage medium for preventing PDCCH false detection.
According to a first aspect of the embodiments of the present disclosure, a method for preventing PDCCH false detection is provided, including:
determining blind test data;
performing hard decision on soft bit data output after performing rate de-matching on the blind detection data;
decoding and cyclic redundancy check are carried out on the soft bit data, and the data passing the cyclic redundancy check are coded;
comparing the coded data with the hard decision result, and calculating the ratio of different bits to the soft bit data;
judging whether the ratio is larger than a preset first threshold value;
when the ratio is greater than or equal to a preset first threshold value and the blind detection data meet a first condition, or when the ratio is smaller than the preset first threshold value and the blind detection data meet a second condition, determining different bit numbers between bit information of the blind detection data and bit information of a Physical Downlink Control Channel (PDCCH) which is detected last time successfully in the historical information;
determining a difference characterization value according to the different bit numbers;
and judging whether the difference characterization value is greater than a preset second threshold value, and determining that the PDCCH false detection is generated when the difference characterization value is greater than the second threshold value.
In one embodiment, the first condition comprises:
and the signal-to-noise ratio of the blind detection data is less than or equal to a first signal-to-noise ratio threshold value.
In one embodiment, the second condition comprises at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
In an embodiment, the determining a difference characterizing value according to the different bit numbers includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
In an embodiment, the determining a difference characterizing value according to the different bit numbers includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
According to a second aspect, an embodiment of the present disclosure provides an apparatus for preventing PDCCH false detection, including:
the first determining module is used for determining blind test data;
the decision module is used for carrying out hard decision on the soft bit data output after carrying out rate de-matching on the blind detection data;
the check module is used for decoding the soft bit data and performing cyclic redundancy check, and encoding the data which passes the cyclic redundancy check;
a comparison module for comparing the encoded data with the hard decision result and calculating the ratio of different bits to the soft bit data;
the first judging module is used for judging whether the ratio is larger than a preset first threshold value or not;
a second determining module, configured to determine, when the ratio is greater than or equal to a predetermined first threshold and the blind detection data meets a first condition, or when the ratio is less than the predetermined first threshold and the blind detection data meets a second condition, different bit numbers between bit information of the blind detection data and bit information of a physical downlink control channel PDCCH that is detected last successfully in the history information;
a third determining module, configured to determine a difference characterization value according to the different bit numbers;
and the second judgment module is used for judging whether the difference representation value is greater than a preset second threshold value or not, and determining that the PDCCH false detection is generated when the difference representation value is greater than the second threshold value.
In one embodiment, the first condition comprises:
and the signal-to-noise ratio of the blind detection data is less than or equal to a first signal-to-noise ratio threshold value.
In one embodiment, the second condition comprises at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
In one embodiment, the third determining module includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
In one embodiment, the third determining module includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
According to a third aspect, an embodiment of the present disclosure provides an apparatus for preventing PDCCH false detection, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute executable instructions in the memory to implement the steps of the method.
According to a fourth aspect, embodiments of the present disclosure provide a non-transitory computer readable storage medium having stored thereon executable instructions that, when executed by a processor, implement the steps of the method.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: comparing the coded data after the cyclic redundancy check with a hard decision result, calculating the proportion of different bits relative to soft bit data between the coded data and the hard decision result, judging whether the proportion is greater than a preset first threshold value, and when the proportion is greater than or equal to the preset first threshold value and the blind detection data accords with a first condition, or is less than the preset first threshold value and the blind detection data accords with a second condition, determining different bit numbers between the bit information of the blind detection data and the bit information of the physical downlink control channel PDCCH which is successfully detected last time in the historical information, and determining a difference representation value according to the different bit numbers; and judging whether the difference representation value is greater than a preset second threshold value, and determining that the PDCCH false detection is generated when the difference representation value is greater than the second threshold value. Through multiple comparison detection on the blind detection data, the PDCCH false detection condition is effectively prevented, the PDCCH detection accuracy and the system transmission efficiency are improved, and the user experience is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flowchart illustrating a method of preventing PDCCH false detections, according to an example embodiment;
FIG. 2 is a flow chart illustrating a method of preventing PDCCH false detection in accordance with an exemplary embodiment;
fig. 3 is a block diagram illustrating an apparatus for preventing PDCCH false detection according to an exemplary embodiment;
fig. 4 is a block diagram illustrating an apparatus for preventing PDCCH false detection according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments in this disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the embodiments in the present disclosure, as detailed in the appended claims.
The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for preventing PDCCH false detection according to an exemplary embodiment. As shown in fig. 1, the method includes:
step S101, determining blind test data;
step S102, carrying out hard decision on soft bit data output after carrying out rate de-matching on the blind detection data;
step S103, decoding and cyclic redundancy check are carried out on the soft bit data, and the data passing the cyclic redundancy check are coded;
step S104, comparing the coded data with the hard decision result, and calculating the ratio of different bits to the soft bit data;
step S105, judging whether the ratio is larger than a preset first threshold value;
step S106, when the ratio is greater than or equal to a predetermined first threshold value and the blind detection data meets a first condition, or when the ratio is less than the predetermined first threshold value and the blind detection data meets a second condition, determining different bit numbers between bit information of the blind detection data and bit information of a Physical Downlink Control Channel (PDCCH) which is successfully detected last time in history information;
step S107, determining a difference characterization value according to the different bit numbers;
step S108, judging whether the difference characterization value is larger than a preset second threshold value, and determining that PDCCH false detection is generated when the difference characterization value is larger than the second threshold value.
In the embodiment of the present disclosure, a mobile terminal (UE) does not know a current transmission mode and a format (format) of a PDCCH (i.e., an aggregation level of a Control Channel Element (CCE)), and there are multiple possible starting positions in the same aggregation level, and furthermore, there are multiple types of Downlink Control Information (DCI) in the same time, so the mobile terminal (UE) needs to perform blind detection on these information of the PDCCH.
In an embodiment, a mobile terminal (UE) performs blind detection, that is, the mobile terminal (UE) finds a starting position of a Control Channel Element (CCE), intercepts a length of guessed Downlink Control Information (DCI) at the starting position of the CCE, obtains blind detection data, decodes the blind detection data, and determines that an information bit carried by a current PDCCH is currently transmitted downlink control information if CRC of the decoded information bit is the same as CRC carried in the PDCCH.
In one embodiment, an implementation of de-rate matching includes:
the input parameters are as follows: original input bit information length A, and CCE aggregation level B; inputting data: x (1: 72 xB).
Step 1: calculating the position and the number of filling bit information when carrying out 32-column interleaving on the system information S, the first check information Y1 and the second check information Y2 according to the original input bit information length;
step 2: judging whether 72 × B is greater than 3 × a, if yes, going to step 3, otherwise, N1 is equal to 72 × B, Z (1: N1) is equal to X (1: N1), and going to step 4;
and step 3: adding information X (3A + 1: 72B) with length exceeding 3A and information X (1: 3A) at the corresponding position, wherein N1 is equal to 3A, and the accumulated data sequence is Z (1: N1);
and 4, step 4: restoring the position of the padding bit information calculated according to the step 1 and data Z (1: N1) to obtain a sequence Z1, namely finding out the position of the padding bit in the sequence Z1, sequentially storing the padding bit in the sequence Z1 according to the position of the sequence Z to be stored, wherein the length of the sequence Z1 is 3 × B, and when the padding bit information is restored to the sequence Z1, the padding bit and other positions of the elements of the sequence Z are not filled with 0;
and 5: the following three sequences were obtained from the Z1 sequence: s1(1: B) ═ Z1(1: B), S2(1: B) ═ Z1(B +2 i +1), i e (0: B-1) S3(1: B) ═ Z1(B +2 i), i e (1: B) and arrange the sequences S1, S2, S3 in rows and columns, as rows and columns, matrix M1, M2, M3;
step 6: the method comprises the steps of generating a 32-column reverse interleaving table P1(1:32) according to an interleaving table of a 3rd Generation partnership project (3 GPP) TS36.212V9.3.0 protocol, interleaving M1, M2 and M3 in a column mode according to an interleaving table P1(1:32), reading out interleaved data in a row and a row mode, wherein the first row is shifted by 32-A% 32 when reading out, and the read-out sequences are K1, K2, K3, K1, K2 and K3 which are outputs of de-rate matching.
In the embodiment of the disclosure, hard decision is performed on soft bit data output after rate de-matching is performed on blind detection data; decoding and cyclic redundancy check are carried out on the soft bit data; coding the data passing the cyclic redundancy check, comparing the coded data with the hard decision result, and calculating the ratio of different bits to soft bit data; judging whether the ratio is larger than a preset first threshold value; when the ratio is greater than or equal to a preset first threshold value and the blind detection data meet a first condition, or when the ratio is smaller than the preset first threshold value and the blind detection data meet a second condition, determining different bit numbers between the bit information of the blind detection data and the bit information of the physical downlink control channel PDCCH which is successfully detected last time in the historical information; determining a difference characterization value according to different bit numbers; and judging whether the difference representation value is greater than a preset second threshold value, and determining that the PDCCH false detection is generated when the difference representation value is greater than the second threshold value. The method effectively prevents the PDCCH from false detection, improves the detection accuracy of the PDCCH and the transmission efficiency of the system, and improves the user experience.
The embodiment of the present disclosure provides a method for preventing PDCCH false detection, where the method includes the method shown in fig. 1, and:
the first condition includes:
and the signal-to-noise ratio of the blind detection data is less than or equal to a first signal-to-noise ratio threshold value.
In the embodiment of the present disclosure, the first condition may be that the signal-to-noise ratio of the blind detection data is less than or equal to a first signal-to-noise ratio threshold. When the ratio of different bits between the hard decision result of the soft bit data output after rate de-matching of the blind detection data and the data coded after decoding and cyclic redundancy check is larger than a predetermined first threshold value and meets a first condition, whether PDCCH false detection is generated or not can be continuously confirmed according to different bit numbers between the bit information of the blind detection data and the bit information of the physical downlink control channel PDCCH which is successfully detected last time in the historical information.
The embodiment of the present disclosure provides a method for preventing PDCCH false detection, where the method includes the method shown in fig. 1, and:
the second condition includes at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
In an embodiment of the present disclosure, the second condition includes at least one of: the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value; the maximum repetition times of the blind detection is larger than a preset first time threshold; and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold. The PDCCH false detection condition is judged in various modes, and the frequency of PDCCH false detection is effectively reduced.
The embodiment of the present disclosure provides a method for preventing PDCCH false detection, where the method includes the method shown in fig. 1, and:
the determining a difference characterization value according to the different bit numbers includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
In the embodiment of the present disclosure, the set difference representation value is a different bit number between the two pieces of bit information, the difference representation value is determined according to the different bit number, the bit number threshold may be set as the second threshold, and the different bit number is determined as the difference representation value, so as to determine whether the difference representation value is greater than the predetermined second threshold, further determine whether a PDCCH false detection occurs, and improve the detection accuracy.
The embodiment of the present disclosure provides a method for preventing PDCCH false detection, where the method includes the method shown in fig. 1, and:
the determining a difference characterization value according to the different bit numbers includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
In the embodiment of the disclosure, the set difference characteristic value is a ratio of different bit numbers between the two pieces of bit information to the bit number of the blind detection data, the difference characteristic value is determined according to the different bit numbers, the ratio threshold can be set as the second threshold, the ratio of the different bit numbers to the bit number of the bit information of the blind detection data is calculated, and the ratio is determined to be the difference characteristic value, so that whether the difference characteristic value is greater than the predetermined second threshold is judged, whether the PDCCH false detection occurs is further judged, and the detection accuracy is improved.
The following is a detailed description of specific examples.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
A method for preventing PDCCH false detection as shown in fig. 2.
Step S201, execute steps S101 to S104. The ratio of different bits between the coded data and the hard decision result relative to the soft bit data is determined, and the signal-to-noise ratio of the blind detection data is determined.
Step S202, judging whether the ratio is larger than a threshold 1, if so, turning to step S203, and if not, turning to step S205.
Step S203, judging whether the signal-to-noise ratio is greater than an SNR threshold 3, if so, turning to step S204, and if not, turning to step S205;
in step S204, it is directly determined that the false detection is performed, and the process ends.
Step S205, determine whether the SNR is less than SNR threshold 3 and greater than SNR threshold 4, if yes, go to step S206.
Step S206, determining whether the following two conditions are satisfied simultaneously: and the Rmax of the configured PDCCH is less than the threshold 5, the repeated times of the PUSCH indicated in the DCI are solved to be more than the threshold 6, and if so, the step S207 is executed.
And step S207, performing second threshold detection according to the bit information of the blind detection data.
Where the SNR threshold 3 is greater than the SNR threshold 4.
The embodiment of the disclosure provides a mobile terminal. Referring to fig. 3, fig. 3 is a structural diagram illustrating a PDCCH false detection prevention according to an exemplary embodiment. As shown in fig. 3, the apparatus includes:
a first determining module 11, configured to determine blind inspection data;
a decision module 12, configured to perform hard decision on soft bit data output after performing rate de-matching on the blind detection data;
the check module 13 is configured to decode the soft bit data and perform cyclic redundancy check, and encode the data that passes the cyclic redundancy check;
a comparison module 14, configured to compare the encoded data with the hard decision result, and calculate a ratio of different bits between the encoded data and the hard decision result to the soft bit data;
a first judging module 15, configured to judge whether the ratio is greater than a predetermined first threshold;
a second determining module 16, configured to determine, when the ratio is greater than or equal to a predetermined first threshold and the blind detection data meets a first condition, or when the ratio is smaller than the predetermined first threshold and the blind detection data meets a second condition, different bit numbers between bit information of the blind detection data and bit information of a physical downlink control channel PDCCH that is detected last successfully in the history information;
a third determining module 17, configured to determine a difference characterization value according to the different bit numbers;
and the second judging module 18 is configured to judge whether the difference characterization value is greater than a predetermined second threshold, and determine that a PDCCH false detection is generated when the difference characterization value is greater than the second threshold.
The disclosed embodiment provides a device for preventing PDCCH false detection, which includes the device shown in fig. 3, and:
the first condition includes:
and the signal-to-noise ratio of the blind detection data is less than or equal to a first signal-to-noise ratio threshold value.
The disclosed embodiment provides a device for preventing PDCCH false detection, which includes the device shown in fig. 3, and:
the second condition includes at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
The disclosed embodiment provides a device for preventing PDCCH false detection, which includes the device shown in fig. 3, and:
the third determining module 17 includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
The disclosed embodiment provides a device for preventing PDCCH false detection, which includes the device shown in fig. 3, and:
the third determining module 17 includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
The embodiment of the present disclosure provides a device for preventing PDCCH false detection, which is applied to a terminal, and includes:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute executable instructions in the memory to implement the steps of the method of preventing PDCCH false positives.
The disclosed embodiments provide a non-transitory computer readable storage medium having stored thereon executable instructions that, when executed by a processor, implement the steps of the method of preventing PDCCH false positives.
Fig. 4 is a block diagram illustrating an operating device 400 for connecting to a network according to an example embodiment. For example, the apparatus 400 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 4, the apparatus 400 may include one or more of the following components: processing components 402, memory 404, power components 406, multimedia components 408, audio components 410, input/output (I/O) interfaces 412, sensor components 414, and communication components 416.
The processing component 402 generally controls overall operation of the apparatus 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.
The memory 404 is configured to store various types of data to support operations at the device 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 404 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 400 is in an operational mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 410 is configured to output and/or input audio signals. For example, audio component 410 includes a Microphone (MIC) configured to receive external audio signals when apparatus 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.
The I/O interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 414 includes one or more sensors for providing various aspects of status assessment for the apparatus 400. For example, the sensor component 414 can detect the open/closed state of the device 400, the relative positioning of components, such as a display and keypad of the apparatus 400, the sensor component 414 can also detect a change in the position of the apparatus 400 or a component of the apparatus 400, the presence or absence of user contact with the apparatus 400, orientation or acceleration/deceleration of the apparatus 400, and a change in the temperature of the apparatus 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 416 is configured to facilitate wired or wireless communication between the apparatus 400 and other devices. The apparatus 400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 404 comprising instructions, executable by the processor 420 of the apparatus 400 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the disclosure following, in general, the principles of the embodiments of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments pertain. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosed embodiments being indicated by the following claims.
It is to be understood that the embodiments of the present disclosure are not limited to the precise arrangements described above and shown in the drawings, and that various combinations, substitutions, modifications, and changes of the method steps or apparatus components disclosed in the present disclosure may be made without departing from the scope thereof, and are intended to be included within the scope of the present disclosure. The scope of the disclosure as claimed is limited by the claims appended hereto.
It should be noted that, in the present disclosure, 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 like elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A method for preventing PDCCH false detection is characterized by comprising the following steps:
determining blind test data;
performing hard decision on soft bit data output after performing rate de-matching on the blind detection data;
decoding and cyclic redundancy check are carried out on the soft bit data, and the data passing the cyclic redundancy check are coded;
comparing the coded data with the hard decision result, and calculating the ratio of different bits to the soft bit data;
judging whether the ratio is larger than a preset first threshold value;
when the ratio is greater than or equal to a preset first threshold value and the blind detection data meet a first condition, or when the ratio is smaller than the preset first threshold value and the blind detection data meet a second condition, determining different bit numbers between bit information of the blind detection data and bit information of a Physical Downlink Control Channel (PDCCH) which is detected last time successfully in the historical information;
determining a difference characterization value according to the different bit numbers;
judging whether the difference characterization value is greater than a preset second threshold value, and determining that PDCCH false detection is generated when the difference characterization value is greater than the second threshold value;
the first condition includes:
the signal-to-noise ratio of the blind detection data is smaller than or equal to a first signal-to-noise ratio threshold value;
the second condition includes at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
2. The method of claim 1,
the determining a difference characterization value according to the different bit numbers includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
3. The method of claim 1,
the determining a difference characterization value according to the different bit numbers includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
4. An apparatus for preventing PDCCH false positives, comprising:
the first determining module is used for determining blind test data;
the decision module is used for carrying out hard decision on the soft bit data output after carrying out rate de-matching on the blind detection data;
the check module is used for decoding the soft bit data and performing cyclic redundancy check, and encoding the data which passes the cyclic redundancy check;
a comparison module for comparing the encoded data with the hard decision result and calculating the ratio of different bits to the soft bit data;
the first judging module is used for judging whether the ratio is larger than a preset first threshold value or not;
a second determining module, configured to determine, when the ratio is greater than or equal to a predetermined first threshold and the blind detection data meets a first condition, or when the ratio is less than the predetermined first threshold and the blind detection data meets a second condition, different bit numbers between bit information of the blind detection data and bit information of a physical downlink control channel PDCCH that is detected last successfully in the history information;
a third determining module, configured to determine a difference characterization value according to the different bit numbers;
the second judgment module is used for judging whether the difference representation value is larger than a preset second threshold value or not, and determining that PDCCH false detection is generated when the difference representation value is larger than the second threshold value;
the first condition includes:
the signal-to-noise ratio of the blind detection data is smaller than or equal to a first signal-to-noise ratio threshold value;
the second condition includes at least one of:
the signal-to-noise ratio of the blind detection data is smaller than a first signal-to-noise ratio threshold value and larger than a second signal-to-noise ratio threshold value;
the maximum repetition times of the blind detection is larger than a preset first time threshold;
and analyzing the repetition times of the physical uplink shared channel PUSCH indicated by the downlink control information DCI from the blind detection data, wherein the repetition times are greater than a second time threshold.
5. The apparatus of claim 4,
the third determining module includes:
determining the different bit numbers as the difference characterization values;
the second threshold value is a bit number threshold.
6. The apparatus of claim 4,
the third determining module includes:
calculating the ratio of the different bit numbers to the bit information of the blind detection data, and determining the ratio as the difference characterization value;
the second threshold value is a ratio threshold.
7. An apparatus for preventing PDCCH false positives, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute executable instructions in the memory to implement the steps of the method of any one of claims 1-3.
8. A non-transitory computer readable storage medium having stored thereon executable instructions, wherein the executable instructions, when executed by a processor, implement the steps of the method of any one of claims 1-3.
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| CN113055129A (en) * | 2021-03-31 | 2021-06-29 | 重庆邮电大学 | PDCCH false detection judgment method suitable for 5G system |
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| EP2398179B1 (en) * | 2010-06-11 | 2017-03-22 | Intel Deutschland GmbH | Method for detecting the validity of downlink control information in telecommunication user equipment, decoder and baseband receiver for performing same |
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| CN101883369A (en) * | 2010-07-06 | 2010-11-10 | 新邮通信设备有限公司 | Blind detection method |
| CN102684820A (en) * | 2011-03-16 | 2012-09-19 | 中兴通讯股份有限公司 | Method and device for judging error detection of physical downlink control channel |
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