CN112533294B

CN112533294B - Control channel detection method, device, communication equipment and storage medium

Info

Publication number: CN112533294B
Application number: CN202011323332.5A
Authority: CN
Inventors: 刘君
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2023-04-21
Anticipated expiration: 2040-11-23
Also published as: CN112533294A

Abstract

The embodiment of the application discloses a control channel detection method, a control channel detection device, communication equipment and a storage medium, wherein the control channel detection method comprises the following steps: performing iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence; determining a current checking result and a current checking value based on the current decoding result; the current check value is used for representing the credibility of the current check result; performing decoding processing based on the current verification result, the current verification value and the termination detection condition; the termination detection condition is used to characterize conditions for terminating iterative decoding.

Description

Control channel detection method, device, communication equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for detecting a control channel, a communication device, and a storage medium.

Background

In a fourth generation (Fourth Generation, 4G) mobile communication Long Term Evolution (LTE) system, a physical downlink control channel (Physical Downlink Control Channel, PDCCH) typically adopts a forward error correction (Forward Error Correction, FEC) channel coding technique, which is a tail biting convolutional code (Tail Biting Convolutional Code, TBCC), and a cyclic redundancy check code (Cyclic Redundancy Check, CRC), which is a common error detection code technique; in this way, the terminal needs to decode in a surrounding iteration decoding mode, and checks based on CRC obtained by the current iteration decoding, and when the CRC passes, the iteration is terminated, so that the downlink control information (Downlink Control Information, DCI) obtained by the current iteration decoding is determined to be a correct decoding result; however, in case the CRC check passes, the corresponding DCI may be erroneous, resulting in false detection of the PDCCH.

Disclosure of Invention

The embodiment of the application provides a control channel detection method, a control channel detection device, communication equipment and a storage medium, and improves the detection accuracy of the control channel.

The technical scheme of the application is realized as follows:

the embodiment of the application provides a method for detecting a control channel, which comprises the following steps:

performing iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence; determining a current check result and a current check value based on the current decoding result; the current check value is used for representing the credibility of the current check result; decoding based on the current verification result, the current verification value and the termination detection condition; the termination detection conditions are used to characterize conditions for terminating the iterative decoding.

The embodiment of the application provides a detection device of a control channel, which comprises:

the decoding module is used for performing iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence;

The determining module is used for determining a current checking result and a current checking value based on the current decoding result; the current check value is used for representing the credibility of the current check result;

the processing module is used for carrying out decoding processing based on the current verification result, the current verification value and the termination detection condition; the termination detection conditions are used to characterize conditions for terminating the iterative decoding.

a processor and a memory for storing a computer program capable of running on the processor; the processor is configured to execute the steps of the control channel detection method when running the computer program.

Embodiments of the present application provide a storage medium storing one or more computer programs executable by one or more processors to implement the steps of the control channel detection method described above.

The method, the device, the equipment and the storage medium for detecting the control channel provided by the embodiment of the application perform iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence; determining a current checking result and a current checking value based on the current decoding result; the current check value is used for representing the credibility of the current check result; performing decoding processing based on the current verification result, the current verification value and the termination detection condition; the termination detection condition is used for representing the condition for terminating iterative decoding; that is, when determining the current checking result, the communication device also needs to evaluate the reliability of the current checking result, and according to the current checking result, the reliability thereof and the termination detection condition, it can determine whether the decoding is successful at the current time, thereby determining whether the next decoding is continued, and reducing the detection accuracy of the control channel.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an encoder according to an embodiment of the present disclosure;

fig. 3 is a schematic flow chart of a control channel detection method provided in an embodiment of the present application;

fig. 4 is a schematic flow chart II of a control channel detection method provided in the embodiment of the present application;

fig. 5 is a flowchart of a control channel detection method according to a third embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a state transition according to an embodiment of the present disclosure;

fig. 7 is a flowchart of a control channel detection method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a control channel detection device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

An embodiment of the present application provides a schematic structural diagram of a communication system, as shown in fig. 1, where the communication system may include: a terminal 101 and a network device 102.

The terminal 101 may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminals, etc. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. The network device 102 and the terminal 101 communicate with each other via some kind of air interface technology, e.g. Uu interface.

The network device 102 may be an evolved NodeB (eNB) in a long term evolution (Long Term Evolution, LTE) system, an Access Point (AP) or a relay station, or may be a base station (such as a gNB or a transmission point (Transmission Point, TRP)) in a 5G system, and in a 5G NR-U system, a device with a base station function is called a gnob or a gNB. As communication technology evolves, the description of "base station" may change. The network device 102 may also be a wireless controller, a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future communication system in a cloud wireless access network (Cloud Radio Access Network, CRAN) scenario, or may also be a base station (such as a gNB or a transmission point (Transmission Point, TRP), a base station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System of Mobile communication, GSM) system or a code division multiple access (Code Division Multiple Access, CDMA) system in an NTN system, or may also be a base station (NodeB, NB) in a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, or the like, which is not limited in this embodiment of the present application.

In addition, in the embodiment of the present application, the network device 102 provides services for a cell, where the terminal 101 communicates with the network device 102 through a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, and the cell may be a cell corresponding to the network device 102 (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services. In addition, the cell may also be a super cell (Hypercell).

Currently, in a 4G mobile communication LTE system, when a network device transmits DCI to a terminal, it is necessary to scramble check bits of the DCI, input the scrambled bit stream and the DCI bit stream into an encoder to encode, and transmit the result of encoding output to the terminal through a PDCCH.

In the embodiment of the present application, the DCI information is generally represented as a K-bit binary DCI bit stream: c ₀ ,c ₁ ,…,c _K-1 Generating a corresponding check bit stream for the DCI information by equation (1): p is p ₀ ,p ₁ ,…,p ₁₅ ：

r(D)＝mod ₂ (m(D)×D ¹⁶ ,g _crc16 (D)) (1)

Wherein r (D) is a polynomial corresponding to the check bit stream, as shown in formula (2); d is a term of the polynomial; g _crc16 (D) A polynomial with a preset highest order term of 16 is shown as a formula (3); m (D) is a polynomial corresponding to the DCI bit stream, as shown in formula (4); mod ₂ Representing binary field division, taking the remainder.

r(D)＝p ₀ ×D ¹⁵ +p ₁ ×D ¹⁴ +…+p ₁₅ (2)

g _crc16 (D)＝D ¹⁶ +D ¹² +D ⁵ +D ¹ (3)

m(D)＝c ₀ ×D ^K-1 +c ₁ ×D ^K-2 +…+c _K-1 (4)

In the embodiment of the present application, after obtaining the check bit stream, each bit in the check bit stream is scrambled by a radio network temporary identifier (Radio Network Temporary Identifier, RNTI) and an antenna selection mask, so as to obtain a scrambled check bit stream: p's' ₀ ,p′ ₁ ,…,p′ ₁₅ 。

It should be noted that, the radio network temporary identifier and the antenna selection mask are both binary bit streams, the number of bits is the same as the number of bits of the check bit stream, and for the ith check bit p 'in the check bit stream' _i Scrambling may be performed as shown in equation (5):

p′ _i ＝(p _i +x _RNTI,i +x _AS,i )mod2 (5)

wherein x is _RNTI,i Represents the ith bit, x in the binary bit stream corresponding to RNTI _AS,i Representing an ith bit in the binary bit stream corresponding to the antenna selection mask; mod2 represents a binary calculation, where "+" represents an exclusive-or algorithm in the binary calculation.

It should be noted that, if the network device is configured with a plurality of antennas, the network device transmits the control channel through which antenna, and an antenna selection mask corresponding to the antenna is used, and each antenna is provided with a corresponding antenna selection mask.

In the embodiment of the present application, after the scrambled check bit stream is placed in the DCI bit stream in sequence, a k' bit encoded bit stream is obtained: c' ₀ ,c′ ₁ ,…,c′ _k′-1 As shown in formula (6):

c′ ₀ ,c′ ₁ ,…,c′ _k′-1 ＝c ₀ ,c ₁ ,…,c _k-1 ,p ₀ ,p ₁ ,…,p ₁₅ (6)

where k' =k+16.

In this embodiment of the present application, after obtaining the encoded bitstream, the network device may input the encoded bitstream to the encoder to encode, and then send the output result of the encoder to the terminal through the PDCCH.

In the embodiment of the present application, the encoder may be a shift register composed of a plurality of retarders, wherein the number of retarders may be set as needed, which is not limited in the embodiment of the present application.

Illustratively, as shown in fig. 2, the encoder may be a TBCC encoder consisting of 6 delays, and the network device needs to sequentially input the encoded bit stream to the encoder from left to right until the last bit input is completed, and then the encoding is finished.

The initial state of the TBCC encoder is the last 6 bits of the encoded bit stream, so that after the encoding of the encoder is finished, the initial state and the finishing state of the encoder can be ensured to be consistent, and tail biting is formed.

In the embodiment of the present application, for any one time, the current state of the encoder is denoted as E ₅ ,E ₄ ,E ₃ ,E ₂ ,E ₁ ,E ₀ Wherein each E is a

binary number

0 or 1; each E represents the current output of one of the delays, respectively; if at the current time, the bit input by the encoder is marked as c' _m Then at the next moment, the rightmost bit of the encoder is shifted out, c' _m From the left side shift in, the current state of the resulting encoder transitions to: c'. _m ,E ₅ ,E ₄ ,E ₃ ,E ₂ ,E ₁ The method comprises the steps of carrying out a first treatment on the surface of the Encoder output

i=0, 1,2, as shown in formulas (7) - (9):

in the embodiment of the application, the output at any moment

Input c 'corresponding to the time' _m And a transition procedure in which the encoder transitions from the current state to the next state; />

The binary bit is a value of 0 or 1.

In the embodiment of the application, after receiving the PDCCH, the terminal needs to demodulate and iterate and decode the PDCCH circularly, each iteration and decode can obtain a corresponding decoding sequence, a current CRC bit stream and a current DCI bit stream are determined from the decoding sequence, checking is performed based on the current CRC, and if the checking is passed, the DCI obtained by the current decoding is determined to be correct DCI; however, in case that the CRC check is passed, the corresponding DCI may not be the correct DCI, that is, there is a certain false detection rate in the method of detecting the PDCCH only through the CRC check result; for example, for a 16-bit CRC, there is an unacceptable probability of false detection; and the false detection of the PDCCH can seriously affect the system scheduling.

An embodiment of the present application provides a method for detecting a control channel, as shown in fig. 3, including: S101-S103.

S101, performing iterative decoding on a control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence;

in the embodiment of the application, after receiving the control channel, the communication device performs iterative decoding on the control channel, so that a current decoding result can be obtained, and the current decoding result is a decoding sequence; the decoding sequence comprises a current time information bit sequence and a current time check bit sequence.

Here, the communication device may be a terminal in the communication system, or may be any communication device such as a network device in the communication system that needs to receive a control channel and decode the control channel, which is not limited in this embodiment of the present application.

In the embodiment of the present application, the method for performing iterative decoding on the control channel may be a maximum likelihood algorithm (Maximum Likelihood, ML) or a maximum a posteriori probability (Maximum A Priori Probability, MAP) algorithm, which is not limited in this embodiment of the present application.

In this embodiment of the present application, after obtaining the decoding result, the communication device may extract, according to a preset encoding manner, the current sub-information bit sequence and the current sub-check bit sequence from the decoding sequence.

For example, if the preset encoding mode is to put the check bit sequence after the information bit sequence to form the encoded bit sequence, the communication device may determine the information bit sequence and the check bit sequence according to the number of bits of the check bit sequence; for example, if the number of check bit sequences is 16, the last 16 bits in the decoded sequence are determined as check bit sequences, and the previous sequence of check bit sequences is determined as information bit sequences.

S102, determining a current check result and a current check value based on a current decoding result; the current check value is used for representing the credibility of the current check result;

in the embodiment of the application, after the communication device obtains the current decoding result, the current checking result and the current checking value can be determined according to the current decoding result; wherein, the current check value is used for representing the credibility of the current check result.

In some embodiments of the present application, the current check value may be used to characterize stability of decoding results obtained by successive iterative decoding; if the decoding results obtained by the continuous repeated iterative decoding are the same, the stability of the decoding results is higher; meanwhile, the reliability of the verification result of the current time is higher; if the current decoding result is different from the last decoding result, the stability of the decoding result is poor, and the reliability of the current checking result is low.

For example, after the current decoding result is obtained, the communication device may compare the current information bit sequence with the last information bit sequence to determine the stability of the information bit sequence; or the communication equipment can also compare the current check bit sequence with the last check bit sequence to determine the stability of the check bit sequence; the embodiments of the present application are not limited in this regard.

In some embodiments of the present application, the current time check value may be used to characterize the stability of the reliability of the current successive multiple decodes; the communication equipment obtains the stability of the current decoding result by carrying out reliability evaluation on the current decoding result, thereby obtaining the reliability of the multiple decoding results, and determining the current check value according to the multiple decoding results.

In the embodiment of the application, if the reliability of the current iterative decoding is high and the reliability of the continuous repeated iterative decoding is high, the reliability of the current continuous repeated checking result is high; if the reliability of the current decoding is low; the last decoding has high reliability, which means that the reliability of the current continuous repeated decoding is low, and the reliability of the current checking result is low.

S103, decoding processing is carried out based on the current verification result, the current verification value and the termination detection condition; the termination detection condition is used to characterize conditions for terminating iterative decoding.

In the embodiment of the application, after the communication device obtains the current verification result and the current verification value, decoding processing can be performed according to the current verification result, the current verification value and the termination detection condition; wherein the termination detection condition is used for characterizing a condition for terminating iterative decoding.

In this embodiment of the present application, the communication device may determine the next decoding processing manner according to whether the current check result and the current check value satisfy the termination detection condition.

In this embodiment of the present application, the next decoding processing manner includes: continuing the next decoding or terminating the iterative decoding.

In the embodiment of the present application, the case of terminating the iterative decoding may be that the decoding fails or the decoding is successful, and the iterative decoding does not need to be continued.

In addition, in the case that the decoding is successful, the communication device determines the current information bit sequence as the detected correct information bit sequence.

The method, the device, the equipment and the storage medium for detecting the control channel provided by the embodiment of the application perform iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence; determining a current checking result and a current checking value based on the current decoding result; the current check value is used for representing the credibility of the current check result; performing decoding processing based on the current verification result, the current verification value and the termination detection condition; the termination detection condition is used for representing the condition for terminating iterative decoding; that is, the communication device needs to determine whether the decoding is successful in the current time according to the current verification result, the current verification value and the termination detection condition, so as to determine whether the next decoding is continued in the subsequent time, thereby improving the detection accuracy of the control channel.

In some embodiments of the present application, the communication device may determine to terminate iterative decoding if the current time check result and the current time check value satisfy a termination detection condition; or if the current check result and the current check value do not meet the condition of ending the iteration, determining to continue the next decoding.

In the embodiment of the present application, the termination detection condition is a preset condition; after the communication equipment acquires the current checking result and the current checking value, judging whether the current checking result and the current checking value meet the condition of ending iteration or not to obtain a judging result; if the judgment result is that the current checking result and the current checking value meet the iteration termination condition, terminating the iteration decoding; otherwise, continuing the next decoding.

In some embodiments of the present application, determining the implementation of the current time check result and the current time check value in S102 based on the current time decoding result, as shown in fig. 4, may include: S201-S203.

S201, calculating based on the current information bit sequence to obtain a current calculation check bit sequence;

in this embodiment of the present application, after obtaining the current sub-information bit sequence, the communication device obtains a polynomial corresponding to the current sub-information bit sequence, substitutes the polynomial as m (D) into equation (1), and obtains a corresponding current sub-calculation check bit sequence.

S202, determining a current verification result based on a current decoding result and a current calculation verification bit sequence;

in this embodiment of the present application, after obtaining the current time of calculation of the check bit sequence, the communication device may determine the current time of check result based on the decoding result and the current time of calculation of the check bit sequence.

In some embodiments of the present application, the communication device may compare the current time calculated check bit sequence with the current time check bit sequence, and determine that the current time check result is a check pass if the current time calculated check bit sequence is the same as the current time check bit sequence; otherwise, determining that the current verification result is that the verification is not passed.

In the embodiment of the application, since the current time of calculation check bit sequence is calculated according to the current time of information bit sequence, the current time of information bit sequence and the current time of check bit sequence are both obtained by current time of decoding; therefore, in the case that the current time of calculation check bit sequence is the same as the current time of check bit sequence, the check passing can be determined, otherwise, the check is determined not to pass.

In some embodiments of the present application, determining the implementation of the current parity result based on the decoding result and the current calculated parity bit sequence in S202 may include: S2021-S2023.

S2021, combining the current time information bit sequence and the current time calculation check bit sequence into a current time check information sequence; the current time of calculating the check bit sequence is behind the current time of information bit sequence;

in the embodiment of the application, the communication device puts the current time of calculation check bit sequence after the current time of information bit sequence to obtain the check information sequence.

Here, if the current information bit sequence is the correct information bit sequence, the current calculated parity bit sequence is the correct parity bit sequence, and the parity information sequence is the encoded bit sequence input by the encoder.

S2022, dividing the current check information sequence by the current check bit sequence to obtain a remainder;

s2023, if the remainder is 0, determining that the current verification result is verification passing; otherwise, determining that the current verification result is that the verification is not passed.

In the embodiment of the application, the communication equipment divides the check information sequence by the current check bit sequence to obtain a remainder; if the remainder is 0, it indicates that the check information sequence is a coded bit sequence, that is, the decoding result obtained by the current decoding is correct, that is, the current information bit sequence is a correct information bit sequence, and the current check bit sequence is a correct check bit sequence.

It can be appreciated that, since the calculated check bit sequence is calculated from the corresponding information bit sequence, the correctness of the current sub-information bit sequence and the current sub-check bit sequence can be determined simultaneously by checking the current sub-calculated check bit sequence and the current sub-check bit sequence. If the current checking result is that the checking is passed, the current information bit sequence and the current checking bit sequence are correct; and if the current checking result is that the checking is not passed, indicating that the current information bit sequence and the current checking bit sequence are incorrect.

S203, determining a current check value based on the current calculation check bit sequence.

In the embodiment of the application, after obtaining the current time of calculating the check bit sequence, the communication device may determine the current time of checking value according to the current time of calculating the check bit sequence.

In some embodiments of the present application, determining the implementation of the current time check value based on the current time calculated check bit sequence in S203, as shown in fig. 5, may include: S301-S303.

S301, acquiring a check bit sequence calculated last time;

s302, comparing the check bit sequence calculated at the current time with the check bit sequence calculated at the last time to obtain a comparison result;

In the embodiment of the application, after each iterative decoding, the communication device can obtain an information bit sequence decoded each time, thereby obtaining a calculation check bit sequence each time; thus, after obtaining the check bit sequence calculated at the current time, the communication device can obtain the check bit sequence calculated at the last time, and compare the check bit sequence calculated at the current time with the check bit sequence calculated at the last time to obtain a comparison result.

In the embodiment of the application, the comparison result is that the check bit sequence calculated at the current time is the same as the check bit sequence calculated at the last time; alternatively, the currently calculated check bit sequence is different from the last calculated check bit sequence.

S303, determining a current check value based on the comparison result.

After the communication device obtains the comparison result in the embodiment of the application, the current check value can be determined according to the comparison result.

In some embodiments of the present application, when the comparison result is that the current calculated check bit sequence is the same as the last calculated check bit sequence, the communication device may increase the check value of the last iterative decoding by a first preset value to obtain the current check value; or, in the case that the comparison result is that the current time reliability result is different from the last time check bit sequence calculated currently, the communication device may determine that the current time check value is a second preset value.

In the embodiment of the application, if the comparison results of the continuous repeated iterative decoding are the same as the check bit sequence calculated at the current time and the check bit sequence calculated at the last time, the check value is continuously increased based on the first preset value; if the comparison results of the continuous repeated iterative decoding are that the check bit sequence calculated at the current time is different from the check bit sequence calculated at the last time, the check value is kept to be a second preset value. The second preset value may be an initial check value, that is, a last check value corresponding to the first decoding in the iterative decoding process.

In some embodiments of the present application, the communication device may set a counter by which the current verification value is obtained.

Illustratively, the first preset value may be 1 and the second preset value 0; the communication device may increase the calculator by 1 in the case that the currently calculated check bit sequence is the same as the last calculated check bit sequence; and setting a counter to 0 when the current calculated check bit sequence is the same as the last calculated check bit sequence. In this way, the communication device can acquire the value of the counter, and determine the value of the counter as the check value.

In some embodiments of the present application, the termination detection condition includes at least one of: 1. the current verification result is verification passing, and the current verification value is larger than a first verification threshold value; 2. the current checking result is that the checking is not passed, and the current checking value is larger than a second checking threshold value; the second test value is greater than the first test threshold; 3. the current iteration number of iterative decoding is larger than the maximum iteration number.

In an embodiment of the present application, the first inspection threshold and the second inspection threshold are preset, wherein the first inspection threshold is greater than the second inspection threshold.

In some embodiments of the present application, after obtaining the current check value, the current check result, and the current iteration number, the communication device determines whether the current iteration number is the maximum iteration number, and if so, terminates iterative decoding; if the current checking result is the checking pass or the checking fail, judging whether the current checking value is larger than a first checking threshold value, if so, determining that the decoding is successful, stopping iterative decoding, and determining the current information bit sequence as a correct information bit sequence; otherwise, continuing the next decoding; if the current checking result is that the checking is not passed, judging whether the current checking value is larger than a second checking threshold value, if so, stopping iterative decoding, otherwise, continuing the next decoding.

In some embodiments of the present application, after obtaining the current check value, the current check result and the current iteration number, the communication device may determine whether the current check result passes or fails the check; if the current verification result is verification passing, judging whether the current verification value is larger than a first verification threshold value or not; if the current check value is larger than the first check threshold value, determining that the decoding is successful and stopping iterative decoding, and determining that the current information bit sequence is a correct information bit sequence; if the current check value is smaller than or equal to the first check threshold value, judging whether the current iteration number is larger than the maximum iteration number and whether the current check value is larger than the second check threshold value; if one of the two judging results is yes, ending the iteration; if the two judging results are no, continuing to decode the next time.

It should be noted that, the first inspection threshold and the second inspection threshold may be set according to actual needs; it may also be determined according to experimental data, and the embodiments of the present application are not limited in this regard.

It can be understood that the communication device needs to combine the relationship between the current check value and the first check threshold value to determine whether the current decoding is successful or not under the condition that the current check result is that the check is passed, so that false detection of the control channel caused by DCI information error due to the pass of the check is avoided, and the detection accuracy of the control channel is improved. And under the condition that the current iteration number does not reach the maximum iteration number, the communication equipment can judge that the current decoding fails when the current verification is not passed and the current verification value is larger than the second verification threshold value, terminate the iterative decoding in advance, and improve the detection efficiency of the control channel.

It should be noted that, setting the bit number of the information bit stream as 40, checking the bit number of the bit stream as 8, the first checking threshold as 2, the second checking threshold as 3, the maximum iteration number as 10, obtaining the false detection rate and average iteration number corresponding to different signal-to-noise ratios through simulation; compared with the prior art, the detection method for the control channel obviously reduces the false detection rate of the control channel; in addition, by adopting the method for detecting the control channel, the average iteration times can be greatly reduced under the condition of low signal-to-noise ratio, the decoding complexity is reduced, and the detection efficiency is improved.

In some embodiments of the present application, performing iterative decoding on a control channel in S101 to obtain a current decoding result includes: S401-S402.

S401, acquiring transmission information of a control channel; the transmission information corresponds to the output data of the encoder;

in the embodiment of the application, after receiving the control channel, the communication device demodulates the control channel to obtain the transmission information of the control channel.

The transmitting device of the control channel encodes the information to be transmitted through the encoder, and after the output data of the encoder is obtained, the encoded output data is modulated and transmitted due to the existence of noise on the control channel; thus, the communication device can directly acquire the output data of the encoder after receiving the control channel, and the communication device demodulates the control channel to obtain the transmission information corresponding to the output data of the encoder.

In the embodiment of the application, the control channel can receive the corresponding transmission information at each moment; the transmission information of each moment corresponds to the encoder output data of one moment; that is, the communication device may acquire at least one transmission information after receiving the control channel is completed.

S402, performing iterative decoding based on the transmission information to obtain a current decoding result.

In this embodiment of the present application, after the communication device obtains the transmission information, iterative decoding may be performed based on the transmission information to obtain a current decoding result.

In some embodiments of the present application, performing iterative decoding based on the transmission information in S402 to obtain a current decoding result includes: S501-S502.

S501, performing iterative decoding based on transmission information, and determining at least one surviving path of the current time; the at least one surviving path is used to characterize a complete transition procedure of the encoder from the at least one start state to the corresponding at least one end state;

in the embodiment of the application, the communication device can determine a complete transfer process of transferring the encoder from the initial state to the corresponding at least one end state according to the transmission information; since the encoder may have at least one end state, the communication device needs to determine a corresponding complete transfer procedure for each end state; each complete transfer process corresponds to a survivor path.

In some embodiments of the present application, performing iterative decoding in S501 based on the transmission information, determining the implementation of the at least one surviving path of the current time may include: S601-S602.

S601, determining at least one corresponding component value metric based on the transmission information and at least one end state; each set of at least one set of component value metrics includes at least one score metric; at least one score metric for characterizing at least one state transition in a complete transition;

in the embodiment of the application, the communication device may determine, for each of at least one end state, a corresponding set of component value metrics, to obtain at least one set of component value metrics; wherein each component value measure comprises at least one score measure; each score metric of the at least one score metrics corresponds to at least one state transition in a complete transition process.

Illustratively, the at least one transmission information obtained by demodulating the control channel by the communication device is at least one log-likelihood ratio LLR (Log Likelihood Ratio, LLR), wherein one log-likelihood ratio at any time

As shown in formula (10):

wherein, the liquid crystal display device comprises a liquid crystal display device,

representation->

Corresponding transmission symbol,/->

Representation->

Corresponding received symbols; />

That is, if->

Is 0 and mapped to 1, transmitted on symbol 1, if +.>

If 1 is mapped to 0, the signal is transmitted on symbol 0.

In the embodiment of the present application, for the encoder shown in fig. 2, the state at any one m+1 time may have 2 ⁶ For any one state s at time m+1 =64 _m+1 It is possible to go from two states s _m,j＝0,1 From this, as shown in fig. 6, fig. 6 shows a state transition butterfly diagram.

Exemplary, s _m+1 ＝C′ _m E ₅ E ₄ E ₃ E ₂ E ₁ The two states corresponding to the m time include: s is(s) _m,0 ＝E ₅ E ₄ E ₃ E ₂ E ₁ 0 and s _m,1 ＝E ₅ E ₄ E ₃ E ₂ E ₁ 1, a step of; that is, s _m+1 Is at s _m,j＝0,1 Is shifted into c 'based on' _m And removed E ₀ Obtained as 0 or 1.

At the bookIn the examples of the application, if c' _m =0, the encoder will be from s _m,0 Transfer to s _m+1 ＝0E ₅ E ₄ E ₃ E ₂ E ₁ Corresponding encoder output

Wherein F is _i As shown in formulas (11) - (13):

from this, it can be determined that if c' _m =1, the encoder will be from s _m,0 Transfer to s _m+1 ＝1E ₅ E ₄ E ₃ E ₂ E ₁ Corresponding to

If c' _m =0, the encoder will be from s _m,1 Transfer to s _m+1 ＝0E ₅ E ₄ E ₃ E ₂ E ₁ Corresponding->

If c' _m =1, the encoder will be from s _m,1 Transfer to s _m+1 ＝1E ₅ E ₄ E ₃ E ₂ E ₁ Corresponding->

In the embodiment of the present application, for any one state s at the m+1 time _m+1 Possibly from the moment mState s of (2) _m,0 Transition from state s at time m is also possible _m,1 From this, it is possible to determine from m to m+1 times, the encoder consisting of s _m,j＝0,1 Transfer to s _m+1 Is a score metric BM _sm+1,j＝0,1 As shown in equation (14):

In the embodiment of the application, the method comprises the following steps of _m,j＝0,1 Transfer to s _m+1 Two score metrics may be obtained:

and

determining the largest score measure of the two score measures as the score measure corresponding to the current state transition, and marking the largest score measure as +.>

If->

Then s is represented _m+1 Is composed of s _m,0 Transferring; if->

Then s is represented _m+1 Is composed of s _m,1 Transferred from the host cell.

In the embodiment of the application, from the start time 0 to the end time k' of the encoder, the state of the encoder is changed from the initial state s ₀ Transfer to s _k′+1 For any one end state s _k′+1 The communication device can obtain k' number

From k' can be->

The composition corresponds to a set of component value measures +.>

In the embodiment of the application, the encoder has several possible end states, and the corresponding several component value metrics can be obtained.

S602, summing at least one score value metric in each component value metric and the corresponding current initial path metric to obtain at least one path metric; wherein at least one path metric is taken as the initial path metric of the next time; the at least one path metric is used to characterize the corresponding at least one surviving path.

In the embodiment of the present application, a set of component value metrics corresponds to a current initial path metric, and at least one score metric in each set of component value metrics is summed with the corresponding current initial path metric to obtain the corresponding path metric.

Exemplary, for any end state s _k′+1 Obtaining corresponding path metrics

Can be calculated by equation (15): />

Will s _k′+1 Corresponding set of component value metrics

And the initial path metric corresponding to the component value metric is marked as +.>

And substituting formula (15) to obtain formula (16):

in the embodiment of the present application, at least one end state exists at time k', and thus, at least one corresponding end state can be obtained

Each +.>

Corresponding to a survivor path.

It should be noted that, the initial path metric

Default to 0 at the first iterative decoding; current iteration decoding +.>

Then the last iteration is decoded>

S502, determining a current decoding result based on at least one surviving path of the current time.

In the embodiment of the present application, the communication device determines at least one path metric, which is equivalent to determining at least one surviving path, and may determine the current decoding result based on the at least one surviving path.

In some embodiments of the present application, determining the implementation of the current decoding result based on the current at least one surviving path in S502 may include: S701-S703.

S701, determining the maximum path metric as a final surviving path from at least one path metric;

In the embodiment of the application, the communication device determines the maximum path metric from at least one path metric, and takes the surviving path corresponding to the maximum path metric as the final surviving path; wherein the final survivor path is used to characterize the actual complete transfer process of the determined encoder.

S702, backtracking is carried out based on a final surviving path, and a current decoding sequence is obtained;

in the embodiment of the application, the communication device may trace back each state transition of the encoder based on the final surviving path, so as to determine the bit inputted by the encoder at each moment, thereby obtaining the current decoding sequence composed of each inputted bit.

S703, determining a current time information bit sequence and a current time check bit sequence from the current time decoding sequence; and taking the current time information bit sequence and the current time check bit sequence as the current time decoding result.

In this embodiment of the present application, after the communication device obtains the current decoding sequence, the current information bit sequence and the current check bit sequence in the current decoding sequence may be determined according to a generation manner of the encoded bit stream.

Illustratively, the coded bit stream is composed of an information bit sequence and a subsequent check bit sequence, and the number of bits of the check bit sequence is 16, then the communication device may determine the last 16 bits in the current decoding sequence as the current check bit sequence, determine the sequence preceding the current check bit sequence as the current information bit sequence, and compose the current decoding result from the current information bit sequence and the current check bit sequence.

In some embodiments of the present application, determining the implementation after the current parity result in S202 based on the decoding result and the current calculated parity bit sequence, as shown in fig. 7, may further include: S801-S802.

S801, acquiring a current reliability parameter based on at least one path metric; the current time reliability parameter is used for representing the reliability of the current time decoding result;

in embodiments of the present application, a communication device may determine a reliability parameter based on at least one path metric; and the reliability of the current decoding result is represented by the reliability parameter.

In some embodiments of the present application, the communication device determines a mean and a variance of at least one path metric; the variance is divided by the square of the mean to obtain the reliability parameter.

Illustratively, the communication device obtains at least one path metric of N, and represents any one path metric as

Wherein n=1, 2, … N; the mean μ of the N path metrics can be found by equation (17):

variance sigma of N path metrics ² Can be obtained by the formula (18):

and then obtaining the reliability parameter rho of the current time through a formula (19):

in embodiments of the present application, the reliability parameter may characterize a degree of uniformity of the at least one path metric distribution; the smaller the calculated reliability parameter, if the at least one path metric distribution is more uniform; the more non-uniform the distribution of the at least one path metric, the greater the calculated reliability parameter, indicating a significant difference between the at least one path metric.

In the embodiment of the present application, the more uniform the at least one path metric distribution is, the smaller the difference between different path metrics is, and the smaller the reliability of the final surviving path determined based on the at least one path metric is, the smaller the reliability of the current decoding result is; the more non-uniform the at least one path metric distribution, i.e. the greater the difference between the different path metrics, the greater the reliability of the final surviving path determined based on the at least one path metric, the greater the reliability of the current decoding result.

S802, determining a current check value based on the current reliability parameter.

In the embodiment of the application, after the communication device acquires the current time reliability parameter, the communication device may determine the current time check value according to the current time reliability parameter.

In some embodiments of the present application, the current check value includes a current first check value and a current second check value; the communication equipment can increase the first check value of the last iteration decoding by a third preset value under the condition that the reliability parameter of the current time is smaller than the reliability threshold value to obtain the first check value of the current time; determining the second check value at the current time as a fourth preset value; or under the condition that the reliability parameter of the current time is larger than or equal to the reliability threshold value, determining the first check value of the current time as a fourth preset value, and adding the second check value of the last iterative decoding by a third preset value to obtain the second check value of the current time.

In the embodiment of the application, if the reliability parameters obtained by continuous repeated iterative decoding are smaller than the preset threshold, the first check value is continuously increased based on the third preset value, and the second check value is kept to be a fourth preset value; if the reliability parameters obtained by the continuous repeated iterative decoding are all larger than or equal to a preset threshold value, the current first check value is kept to be a third preset value; the second test value is continuously increased based on the fourth preset value.

In this embodiment of the present application, the first check value and the second check value are used to characterize the stability of the reliability of the decoding result that is continuously repeated, that is, the reliability of the current check result. The first test value is used for representing the stability degree with low reliability, and the second test value is used for representing the stability degree with high reliability.

In some embodiments of the present application, the communication device may set a corresponding first counter to the current first check value; setting a corresponding second counter for the second checking value of the current time, acquiring the first checking value of the current time through the first counter, and acquiring the second checking value of the current time through the second counter.

Illustratively, the third preset value may be 1 and the fourth preset value is 0; the communication device may increment the first counter by 1 and set the second counter to 0 if the current reliability parameter is less than the reliability threshold; in case the current reliability parameter is greater than or equal to the reliability threshold, the first counter is set to 0 and the second counter is incremented by 1.

In some embodiments of the present application, the termination detection condition may include at least one of: 1. the current verification result is verification passing, and the current second verification value is larger than a third verification threshold value; 2. the current checking result is that the checking is not passed, and the current first checking value is larger than the fourth checking threshold value; 3. the current iteration number of iterative decoding is larger than the maximum iteration number.

In some embodiments of the present application, after obtaining the current first check value, the current second check value, the current check result and the current iteration number, the communication device determines whether the current iteration number is the maximum iteration number, and if so, terminates iterative decoding; if the current checking result is the checking pass or the checking fail, judging whether the current second checking value is larger than a third checking threshold value, if so, determining that the decoding is successful, stopping iterative decoding, and determining the current information bit sequence as a correct information bit sequence; otherwise, continuing the next decoding; if the current check result is that the check is not passed, judging whether the current first check value is larger than a fourth check threshold value, if so, stopping iterative decoding, otherwise, continuing the next decoding.

In some embodiments of the present application, after obtaining the current first check value, the current second check value, the current check result and the current iteration number, the communication device may determine whether the current check result passes or fails the check; if the current verification result is verification passing, judging whether the current second verification value is larger than a third verification threshold value or not; if yes, determining that the decoding is successful and stopping iterative decoding, and determining the current information bit sequence as a correct information bit sequence; otherwise, continuing to judge whether the current iteration number is greater than the maximum iteration number and whether the current first test value is greater than a fourth test threshold value; if one of the two judging results is yes, ending the iteration; if the two judging results are no, continuing to decode the next time.

It should be noted that the third inspection threshold and the fourth inspection threshold may be set according to actual needs; it may also be determined according to experimental data, and the embodiments of the present application are not limited in this regard.

It can be understood that the communication device can determine whether the current decoding is successful or not by combining the relationship between the current second check value and the third check threshold value under the condition that the current check result is that the check is passed, so that false detection of the control channel caused by DCI information error due to the pass of the check is avoided, and the detection accuracy of the control channel is improved. And under the condition that the current iteration number does not reach the maximum iteration number, the communication equipment can judge that the current decoding fails when the current verification is failed and the current first verification value is larger than the fourth verification threshold value, terminate the iterative decoding in advance, and improve the detection efficiency of the control channel.

It should be noted that, setting the bit number of the information bit stream as 40, the bit number of the check bit stream as 8, the reliability threshold as 0.05, the third check threshold as 3, the fourth check threshold as 1, the maximum iteration number as 10, obtaining the false detection rate and the average iteration number corresponding to different signal-to-noise ratios through simulation; compared with the prior art, the detection method for the control channel obviously reduces the false detection rate of the control channel; in addition, by adopting the method for detecting the control channel, under the condition of low signal-to-noise ratio, the average iteration times can be greatly reduced, the decoding complexity is reduced, and the detection efficiency is improved.

An embodiment of the present application provides a control channel detection apparatus, as shown in fig. 8, the control channel detection apparatus 18 includes:

the decoding module 181 is configured to perform iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence;

a determining module 182, configured to determine a current time check result and a current time check value based on the current time decoding result; the current check value is used for representing the credibility of the current check result;

A processing module 183, configured to perform decoding processing based on the current verification result, the current verification value, and a termination detection condition; the termination detection conditions are used to characterize conditions for terminating the iterative decoding.

In some embodiments, the processing module 183 is further configured to determine to terminate the iterative decoding if the current time check result and the current time check value satisfy a termination detection condition; and if the current check result and the current check value do not meet the termination detection condition, determining to continue the next decoding.

In some embodiments, the determining module 182 is further configured to perform a calculation based on the current information bit sequence to obtain a current calculated check bit sequence; determining the current time check result based on the decoding result and the current time calculation check bit sequence; and determining the current check value based on the current calculation check bit sequence.

In some embodiments, the determining module 182 is further configured to obtain a last calculated check bit sequence; comparing the current calculated check bit sequence with the last calculated check bit sequence to obtain a comparison result; and determining the current check value based on the comparison result.

In some embodiments, the determining module 182 is further configured to increase the check value of the last iterative decoding by a first preset value if the comparison result is that the current calculated check bit sequence is the same as the last calculated check bit sequence, so as to obtain the current check value; and if the current time reliability result is different between the current time calculated check bit sequence and the last time calculated check bit sequence, determining the current time check value as a second preset value.

In some embodiments, the determining module 182 is further configured to determine that the current parity result is a parity pass if the current calculated parity bit sequence is the same as the current parity bit sequence; otherwise, determining that the current verification result is that the verification is not passed.

In some embodiments, the determining module 182 is further configured to combine the current time information bit sequence and the current time calculated check bit sequence into a current time check information sequence; the current time calculation check bit sequence is behind the current time information bit sequence; dividing the current time check information sequence by the current time check bit sequence to obtain a remainder; if the remainder is 0, determining that the current verification result is verification passing; otherwise, determining that the current verification result is that the verification is not passed.

In some embodiments, the termination detection condition includes at least one of: the current verification result is verification passing, and the current verification value is larger than a first verification threshold value; the current checking result is that checking is not passed, and the current checking value is larger than a second checking threshold value; the second inspection threshold is greater than the first inspection threshold; the current iteration number of the iterative decoding is larger than the maximum iteration number.

In some embodiments, the decoding module 181 is further configured to obtain transmission information of the control channel; the transmission information corresponds to the output data of the encoder; and performing iterative decoding based on the transmission information to obtain the current decoding result.

In some embodiments, the decoding module 181 is further configured to perform iterative decoding based on the transmission information to determine at least one surviving path of the current time; the at least one surviving path is used to characterize a complete transition procedure of the encoder from at least one start state to a corresponding at least one end state; and determining the current decoding result based on the current at least one surviving path.

In some embodiments, the decoding module 181 is further configured to determine a corresponding at least one set of component value metrics based on the transmission information and the at least one end state; each set of the at least one set of component value metrics includes at least one score metric; the at least one score metric is used for characterizing at least one state transition process in one of the complete transition processes corresponding to the corresponding one of the ending states; summing at least one score metric in each component value metric with the corresponding current initial path metric to obtain at least one path metric; wherein the at least one path metric is taken as the initial path metric for the next time; the at least one path metric is used to characterize the corresponding at least one surviving path.

In some embodiments, the decoding module 181 is further configured to determine, from the at least one path metric, a largest path metric as a final surviving path; backtracking is carried out based on the final surviving path, and a current decoding sequence is obtained; determining the current sub-information bit sequence and the current sub-check bit sequence from the current sub-decoding sequence; and taking the current time information bit sequence and the current time check bit sequence as a current time decoding result.

In some embodiments, the determining module 182 is further configured to obtain a current reliability parameter based on the at least one path metric; the current sub-reliability parameter is used for representing the reliability of the current sub-decoding result; the current time check value is determined based on the current time coding result and the current time reliability parameter.

In some embodiments, the determining module 182 is further configured to determine a mean and a variance of the at least one path metric; dividing the variance by the square of the mean to obtain the reliability parameter.

In some embodiments, the determining module 182 is further configured to increase the current first check value of the previous iterative decoding by a third preset value if the current reliability parameter is smaller than the reliability threshold value, to obtain the current first check value; determining the second check value of the current time as a fourth preset value; and if the current reliability parameter is greater than or equal to the reliability threshold, determining the current first check value as the fourth preset value, and increasing the second check value of the last iterative decoding by the third preset value to obtain the current second check value.

In some embodiments, the termination detection condition includes at least one of: the current verification result is verification passing, and the current second verification value is larger than a third verification threshold value; the current verification result is that verification is not passed, and the current first verification value is larger than a fourth verification threshold value; the current iteration number of the iterative decoding is larger than the maximum iteration number.

Fig. 9 is a schematic diagram of the structural composition of a communication device according to an embodiment of the present application, as shown in fig. 9, the communication device 19 includes a memory 1901, a processor 1902, and a computer program stored on the memory 1901 and executable on the first processor 1902; wherein the processor is configured to execute the method for detecting a control channel as in the previous embodiments when running the computer program.

It will be appreciated that the communication device 19 also includes a bus system 1903; the various components in the communication device 19 are coupled together by a bus system 1903. It is appreciated that the bus system 1903 is used to implement the connected communications between these components. The bus system 1903 includes a power bus, a control bus, and a status signal bus in addition to the data bus.

It will be appreciated that the memory in this embodiment may be either volatile memory or nonvolatile memory, and may include both volatile and nonvolatile memory. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable programmable Read Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), magnetic random access Memory (Ferromagnetic Random Access Memory, FRAM), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or Read Only optical disk (Compact Disc Read-Only Memory, CD-ROM); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (Static Random Access Memory, SRAM), synchronous static random access memory (Synchronous Static Random Access Memory, SSRAM), dynamic random access memory (Dynamic Random Access Memory, DRAM), synchronous dynamic random access memory (Synchronous Dynamic Random Access Memory, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate Synchronous Dynamic Random Access Memory, ddr SDRAM), enhanced synchronous dynamic random access memory (Enhanced Synchronous Dynamic Random Access Memory, ESDRAM), synchronous link dynamic random access memory (SyncLink Dynamic Random Access Memory, SLDRAM), direct memory bus random access memory (Direct Rambus Random Access Memory, DRRAM). The memory described in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The method disclosed in the embodiments of the present application may be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied in a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium having memory and a processor reading information from the memory and performing the steps of the method in combination with hardware.

The embodiment of the application also provides a storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps in the method for detecting a control channel according to the embodiment of the application when the storage medium is located in a communication device.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, and for example, the division of modules is merely a logical function division, and other divisions may be implemented in practice, such as: multiple modules or components may be combined, or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or modules, whether electrically, mechanically, or otherwise.

Claims

1. A method for detecting a control channel, comprising:

performing iterative decoding on the control channel to obtain a current decoding result; the current decoding result comprises a current information bit sequence and a current check bit sequence;

calculating based on the current information bit sequence to obtain a current calculation check bit sequence, and determining the current check result based on the current decoding result and the current calculation check bit sequence;

Obtaining a last calculated check bit sequence, comparing the current calculated check bit sequence with the last calculated check bit sequence to obtain a comparison result, and determining the current check value based on the comparison result; the current check value is used for representing the credibility of the current check result;

decoding based on the current verification result, the current verification value and the termination detection condition; the termination detection conditions are used to characterize conditions for terminating the iterative decoding.

2. The method of claim 1, wherein the decoding process based on the current verification result, the current verification value, and a termination detection condition comprises:

if the current check result and the current check value meet the termination detection condition, determining to terminate the iterative decoding;

and if the current check result and the current check value do not meet the termination detection condition, determining to continue the next decoding.

3. The method of claim 1, wherein the determining the current test value based on the comparison result comprises:

If the comparison result is that the current calculated check bit sequence is the same as the last calculated check bit sequence, increasing the check value of the last iterative decoding by a first preset value to obtain the current check value;

and if the comparison result is that the current time calculated check bit sequence is different from the last time calculated check bit sequence, determining that the current time check value is a second preset value.

4. The method of claim 3, wherein the determining the current secondary check result based on the current secondary decoding result and the current secondary computed check bit sequence comprises:

if the current time calculated check bit sequence is the same as the current time check bit sequence, determining that the current time check result is check passing; otherwise, determining that the current verification result is that the verification is not passed.

5. The method of claim 3, wherein the determining the current secondary check result based on the current secondary decoding result and the current secondary computed check bit sequence comprises:

combining the current sub-information bit sequence and the current sub-calculation check bit sequence into a current sub-check information sequence; the current time calculation check bit sequence is behind the current time information bit sequence;

Dividing the current time check information sequence by the current time check bit sequence to obtain a remainder;

if the remainder is 0, determining that the current verification result is verification passing; otherwise, determining that the current verification result is that the verification is not passed.

6. The method of any one of claims 1-5, wherein the termination detection conditions include at least one of:

the current verification result is verification passing, and the current verification value is larger than a first verification threshold value;

the current checking result is that checking is not passed, and the current checking value is larger than a second checking threshold value; the second inspection threshold is greater than the first inspection threshold;

the current iteration number of the iterative decoding is larger than the maximum iteration number.

7. The method according to any one of claims 1-5, wherein iteratively decoding the control channel to obtain a current decoding result includes:

acquiring transmission information of the control channel; the transmission information corresponds to the output data of the encoder;

and performing iterative decoding based on the transmission information to obtain the current decoding result.

8. The method of claim 7, wherein performing iterative decoding based on the transmission information to obtain the current decoding result comprises:

performing iterative decoding based on the transmission information, and determining at least one surviving path of the current time; the at least one surviving path is used to characterize a complete transition procedure of the encoder from at least one start state to a corresponding at least one end state;

and determining the current decoding result based on the current at least one surviving path.

9. The method of claim 8, wherein iteratively decoding, based on the transmission information, determines at least one survivor path of the current time, comprising:

determining a corresponding at least one set of component value metrics based on the transmission information and the at least one end state; each set of the at least one set of component value metrics includes at least one score metric; the at least one score metric is used to characterize at least one state transition process of a corresponding one of the complete transition processes;

summing at least one score metric in each component value metric with the corresponding current initial path metric to obtain at least one path metric; wherein the at least one path metric is taken as the initial path metric for the next time; the at least one path metric is used to characterize the corresponding at least one surviving path.

10. The method of claim 9, wherein the determining the current decoding result based on the current at least one surviving path comprises:

determining the maximum path metric from the at least one path metric as the final surviving path;

backtracking is carried out based on the final surviving path, and a current decoding sequence is obtained;

determining the current sub-information bit sequence and the current sub-check bit sequence from the current sub-decoding sequence; and taking the current time information bit sequence and the current time check bit sequence as a current time decoding result.

11. The method of claim 9, wherein after determining the current time check result based on the current time check result and the current time calculated check bit sequence, the method further comprises:

acquiring a current reliability parameter based on the at least one path metric; the current sub-reliability parameter is used for representing the reliability of the current sub-decoding result;

the current time check value is determined based on the current time reliability parameter.

12. The method of claim 11, wherein the obtaining the current reliability parameter based on the at least one path metric comprises:

Determining a mean and variance of the at least one path metric;

and dividing the variance by the square of the mean value to obtain the current sub-reliability parameter.

13. The method of claim 12, wherein the current check value comprises a current first check value and a current second check value; the determining the current time check value based on the current time reliability parameter includes:

if the current reliability parameter is smaller than the reliability threshold, adding a third preset value to the first check value of the last iterative decoding to obtain the current first check value; determining the second check value of the current time as a fourth preset value;

and if the current reliability parameter is greater than or equal to the reliability threshold, determining the current first check value as the fourth preset value, and increasing the second check value of the last iterative decoding by the third preset value to obtain the current second check value.

14. The method of claim 13, wherein the termination detection condition comprises at least one of:

the current verification result is verification passing, and the current second verification value is larger than a third verification threshold value;

The current verification result is that verification is not passed, and the current first verification value is larger than a fourth verification threshold value;

15. A control channel detection apparatus, comprising:

the determining module is used for calculating based on the current information bit sequence to obtain a current calculation check bit sequence, and determining the current check result based on the current decoding result and the current calculation check bit sequence; obtaining a last calculated check bit sequence, comparing the current calculated check bit sequence with the last calculated check bit sequence to obtain a comparison result, and determining the current check value based on the comparison result; the current check value is used for representing the credibility of the current check result;

16. A communication device, the device comprising: a processor and a memory for storing a computer program capable of running on the processor;

wherein the processor is adapted to perform the steps of the method of any of claims 1 to 14 when the computer program is run.

17. A storage medium storing one or more computer programs executable by one or more processors to implement the steps of the method of any one of claims 1 to 14.