CN117335942A

CN117335942A - Method, device and storage medium for detecting content of DCI1-1 of PDCCH

Info

Publication number: CN117335942A
Application number: CN202311473211.2A
Authority: CN
Inventors: 胡雅琴; 王飞
Original assignee: Zhongshan Dongfang Longda Technology Co ltd
Current assignee: Zhongshan Dongfang Longda Technology Co ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-01-02

Abstract

The application relates to the technical field of 5G networks, and particularly discloses a method, a device and a storage medium for detecting content of DCI1-1 of PDCCH in a 5G system. According to the method, each candidate configuration in the PDCCH candidate configuration set is detected, the undetected target candidate configuration is screened out for verification, and the detected candidate configuration is not subjected to data processing, so that repeated detection is avoided, and the content detection efficiency is improved; and the target candidate configuration is subjected to frequency offset estimation and time offset estimation, the target candidate configuration is screened according to a preset time offset threshold value and a preset frequency offset threshold value, the screened target candidate configuration meeting the condition is checked, the checked target candidate configuration is used as the real configuration of the PDCCH, and the processing flow is terminated in time if the target candidate configuration does not meet the condition, so that the data calculation amount is reduced, and the configuration checking efficiency is improved.

Description

Method, device and storage medium for detecting content of DCI1-1 of PDCCH

Technical Field

The present invention relates to the field of 5G networks, and in particular, to a method, an apparatus, and a storage medium for detecting DCI1-1 of a PDCCH in a 5G system.

Background

5G NR (New Radio) air interface monitoring device: the purposes of monitoring radio environment, positioning and identifying the UE, detecting content and the like are achieved by detecting wireless signals of uplink and downlink communication between the UE (User Equipment) and a base station. The air interface monitoring equipment does not interact with the base station and the mobile phone, and only monitors the radio signals in the air interface in a silent mode, so that the aim of identifying the radio signals is fulfilled.

PDCCH (Physical downlink control channel ) whose payload content is DCI (Downlink control information dedicated control information). DCI has a plurality of formats (DCI 1-0, DCI1-1, DCI0-0, DCI1-1, etc.), where DCI1-1 is used to indicate the physical parameter configuration of PDSCH (Physical downlink shared channel ) when UE is in RRC (Radio Resource Control, radio resource control) connected state, and the payload of PDSCH can be obtained only by resolving the correct PDSCH configuration through DCI1-1, and the payload of PDSCH is exactly what is needed by 5G system.

The parsing of DCI1-1 depends on the context of the UE. The same bit has different meanings in different contexts. For the UE, the parameter configuration thereof can be obtained through RRC reconfiguration message (modifying network connection), while for the third party monitoring device, since the reconfiguration message of the target UE is encrypted, the third party monitoring device cannot obtain the context of the target UE, and can only obtain the real meaning of DCI1-1 through data detection.

At present, in the data monitoring method of DCI1-1 content in the prior art, after channel estimation, equalization, rate-de-matching, LDPC decoding and CRC checking are performed on each PDSCH configuration, whether the PDSCH configuration is effective or not can be judged, the calculation amount is large in the whole flow, the time consumption is long, and especially the LDPC decoding takes the longest time, so that the checking efficiency of the PDSCH configuration is low.

Therefore, how to solve the problem that the configuration verification efficiency of the PDCCH is low at present becomes a technical problem to be solved.

Disclosure of Invention

The application provides a method, a device and a storage medium for detecting the content of DCI1-1 of a PDCCH in a 5G system, so as to improve the content detection efficiency of DCI1-1 of the PDCCH.

In a first aspect, the present application provides a method for detecting content of DCI1-1 of PDCCH in 5G system, the method comprising:

acquiring a candidate configuration set of a Physical Downlink Control Channel (PDCCH), wherein the candidate configuration set comprises at least one candidate configuration of the PDCCH;

detecting whether an undetected target candidate configuration exists in the candidate configuration set;

when the undetected target candidate configuration exists in the candidate configuration set, performing frequency offset estimation and time offset estimation on the target candidate configuration to obtain a frequency offset estimation value and a time offset estimation value;

when the frequency offset estimation value is smaller than a preset frequency offset threshold value and the time offset estimation value is smaller than a preset time offset threshold value, checking the target candidate configuration to obtain a configuration checking result;

and when the configuration verification result is that verification passes, determining that the target candidate configuration is the actual configuration of the PDCCH.

In a second aspect, the present application further provides a device for detecting content of DCI1-1 of PDCCH in 5G system, where the device includes:

a candidate configuration set acquisition module, configured to acquire a candidate configuration set of a physical downlink control channel PDCCH, where the candidate configuration set includes at least one candidate configuration of the PDCCH;

a candidate configuration detection module, configured to detect whether an undetected target candidate configuration exists in the candidate configuration set;

the time offset and frequency offset estimation module is used for carrying out frequency offset estimation and time offset estimation on the target candidate configuration when the undetected target candidate configuration exists in the candidate configuration set, so as to obtain a frequency offset estimation value and a time offset estimation value;

the configuration verification module is used for verifying the target candidate configuration when the frequency offset estimation value is smaller than a preset frequency offset threshold value and the time offset estimation value is smaller than a preset time offset threshold value, so as to obtain a configuration verification result;

and the configuration determining module is used for determining that the target candidate configuration is the actual configuration of the PDCCH when the configuration verification result is verification passing.

In a third aspect, the present application further provides a computer readable storage medium storing a computer program, where the computer program when executed by a processor causes the processor to implement a method for detecting content of DCI1-1 of PDCCH in the 5G system as described above.

The application discloses a content detection method, a device, computer equipment and a storage medium of DCI1-1 of PDCCH in a 5G system, wherein the method comprises the following steps: acquiring a candidate configuration set of a Physical Downlink Control Channel (PDCCH), wherein the candidate configuration set comprises at least one candidate configuration of the PDCCH; detecting whether an undetected target candidate configuration exists in the candidate configuration set; when the undetected target candidate configuration exists in the candidate configuration set, performing frequency offset estimation and time offset estimation on the target candidate configuration to obtain a frequency offset estimation value and a time offset estimation value; when the frequency offset estimation value is smaller than a preset frequency offset threshold value and the time offset estimation value is smaller than a preset time offset threshold value, checking the target candidate configuration to obtain a configuration checking result; and when the configuration verification result is that verification passes, determining that the target candidate configuration is the actual configuration of the PDCCH. By the method, each candidate configuration in the PDCCH candidate configuration set is detected, the undetected target candidate configuration is screened out for verification, and the detected candidate configuration is not subjected to data processing, so that repeated detection is avoided, and the content detection efficiency is improved; and the target candidate configuration is subjected to frequency offset estimation and time offset estimation, the target candidate configuration is screened according to a preset time offset threshold value and a preset frequency offset threshold value, the screened target candidate configuration meeting the condition is checked, the checked target candidate configuration is used as the real configuration of the PDCCH, and the processing flow is terminated in time if the target candidate configuration does not meet the condition, so that the data calculation amount is reduced, and the configuration checking efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flowchart of a first implementation manner of a content detection method of DCI1-1 of PDCCH in a 5G system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a first step extension scheme of a first embodiment of a method for detecting content of DCI1-1 of PDCCH in a 5G system according to an embodiment of the present application;

FIG. 3 is a schematic flow chart of DCI1-1 content detection in the prior art provided by an embodiment of the present application;

FIG. 4 is a flowchart of an embodiment of content detection of DCI1-1 according to the present embodiment;

fig. 5 is a schematic flowchart of a second implementation manner of a content detection method of DCI1-1 of PDCCH in a 5G system according to an embodiment of the present application;

FIG. 6 is a schematic flow chart of another implementation of content detection of DCI1-1 provided in an embodiment of the present application;

fig. 7 is a schematic block diagram of a computer device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification 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 in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic flowchart of a first embodiment of a method for detecting content of DCI1-1 of PDCCH in a 5G system according to an embodiment of the present application. The content detection method of DCI1-1 of PDCCH in the 5G system can be applied to a server.

As shown in fig. 1, the method for detecting the content of DCI1-1 of PDCCH in the 5G system specifically includes steps S101 to S105.

S101, acquiring a candidate configuration set of a Physical Downlink Control Channel (PDCCH), wherein the candidate configuration set comprises at least one candidate configuration of the PDCCH;

in an embodiment, the physical parameter configuration of the physical downlink control channel PDCCH is carried by downlink control information DCI1-1, so that the candidate configuration of the PDCCH is derived from DCI1-1, and the correct physical downlink shared channel PDSCH configuration is resolved by DCI1-1 to obtain the load of the PDSCH, i.e. the physical parameter configuration of the PDCCH.

Further, as shown in fig. 2, the S101 specifically includes:

s1011, acquiring a bit sequence of downlink control information DCI1-1 in the PDCCH;

in an embodiment, the bit sequence of DCI1-1 is obtained by performing channel estimation, equalization, de-rate matching and polarization polar decoding on the PDCCH.

It will be appreciated that in a communication system, signals may pass through a medium (channel) and that as the signals pass through the channel, distortion of the signals or various noise may be added to the signals. The received signal is decoded correctly without generating too many errors, i.e. the distortion and noise imposed by the channel is removed from the received signal. To do this, the first step is to find out the characteristics of the channel through which the signal passes. This process is called "channel estimation".

Channel estimation is the process of estimating model parameters of a certain channel model to be assumed from received data. If the channel is linear, then the channel estimate is an estimate of the system impulse response. It is emphasized that channel estimation is a mathematical representation of the effect of a channel on an input signal.

Channel equalization refers to an anti-fading measure taken to improve the transmission performance of a communication system in a fading channel. It is mainly aimed at eliminating or weakening the inter-code crosstalk problem resulted from multipath time delay in broadband communication. The mechanism is to compensate the characteristics of the channel or the whole transmission system, and aiming at the characteristics of constant parameters or variable parameters of the channel, the data rate is different, and the equalization has various structural modes, including frequency domain equalization, time domain equalization and the like.

Rate matching refers to bits on the transmission channel being retransmitted or punctured, while de-rate matching refers to filling out bits that were punctured for rate matching with a convention of 0 or 1.

Polar decoding the process of translating a pole code into a set of numbers using a coding table or a series of signals representing an item of information into a pole code using a coding table. The core idea of Polar codes is the theory of channel polarization, which consists of two parts, channel combining and channel splitting. When the number of combined channels goes to infinity, polarization occurs: some of the channels will tend to be noise free and others will tend to be all noise channels, a phenomenon known as channel polarization. The transmission rate of the noiseless channel would reach the channel capacity, while the transmission rate of the full-noise channel would tend to be 0. The coding strategy of Polar codes is the characteristic of applying the phenomenon, and utilizes a noiseless channel to transmit useful information of users, and a full-noise channel to transmit contracted information or no-transmission information.

S1012, acquiring a variable field and a fixed field in the bit sequence;

in one embodiment, the bit sequence of Dci1-1 includes a variable field and a fixed field, the variable field being a field with an indeterminate bit length, i.e., there are a plurality of results for the bit length of the variable field, and the bit length of the fixed field is determined. As shown in table 1, table 1 is a field analysis of Dci 1-1:

TABLE 1 DCI1-1 analysis of the various fields

The variable fields contained in the bit sequence of DCI1-1 include: BWP (Bandwidth Part), frequency domain resource allocation field, antenna port field. As shown in table 2, table 2 is a field analysis of variable fields.

TABLE 2 variable field analysis in DCI1-1

Fields	Description of the invention
		BWP configuration field	1bit or 2 bits
Frequency domain resource allocation field	Type0 or dynamic
		Antenna port field	Related to dmrs type and maxlen, possibly 4-6 bits

For these variable fields with indeterminate bit lengths, it is necessary to find the true meaning of the field by using a detection method.

S1013, based on an exhaustion method, combining the variable fields to obtain a variable field combination set, wherein the variable field combination set comprises at least one variable field combination;

in an embodiment, according to the bit lengths corresponding to the variable fields in table 2, all possible combinations are exhausted through an exhaustion method, for example, the BWP configuration field (1 bit) +the frequency domain resource allocation field (Type 0) +the antenna port field (4 bit), and the exhaustion result in a total of 2×2×3=12 combinations.

S1014, obtaining a candidate configuration set of the PDCCH based on the combination result of each variable field combination and the fixed field in the variable field combination set.

In an embodiment, for all the variable field combinations obtained through exhaustion, the variable field combinations are recombined with the fixed fields in the bit sequence of DCI1-1 respectively, so that 12 PDSCH configurations can be obtained, and the configuration is used as a set of PDSCH candidate configurations, i.e. a candidate configuration set, and the size of the set is 12.

S102, detecting whether undetected target candidate configuration exists in the candidate configuration set;

in one embodiment, as shown in fig. 3, fig. 3 is a content detection flow for DCI1-1 in the prior art. In the prior art, first, the DCI1-1 resolves all the PDSCH configurations. Then, channel estimation, equalization, LDPC (Low Density Parity Check ) decoding, CRC (Cyclic Redundancy Check, cyclic redundancy check) checking are performed for each PDSCH configuration in turn. Finally, for the correct PDSCH configuration for CRC check, the actual configuration of DCI1-1 is considered. If all CRCs are incorrect, then DCI1-1 is considered to have no real configuration.

In one embodiment, in the present application, for a set of candidate configurations, each candidate configuration is detected in turn. If there is no undetected PDSCH configuration in the candidate configuration set, i.e., each candidate configuration in the candidate configuration set has undergone the content detection procedure of DCI1-1, then there is no correct PDSCH configuration in the bit sequence of this DCI1-1, and the detection is ended. If at least one candidate configuration which does not do DCI1-1 content detection exists in the candidate configuration set, the candidate configuration is used as a target candidate configuration, and the subsequent flow of DCI1-1 content detection is executed on the target candidate configuration.

S103, when the undetected target candidate configuration exists in the candidate configuration set, performing frequency offset estimation and time offset estimation on the target candidate configuration to obtain a frequency offset estimation value and a time offset estimation value;

further, when the undetected target candidate configuration does not exist in the candidate configuration set, determining that the bit sequence of the DCI1-1 does not exist in the real configuration of the PDCCH.

In an embodiment, when all the target candidate configurations in the candidate configuration set have been subjected to the content detection of DCI1-1, it indicates that the target candidate configuration has not had new configuration content or that the configuration data is invalid. Thus, it may be determined that the bit sequence of DCI1-1 does not have the actual configuration of the PDCCH.

In an embodiment, when at least one target candidate configuration which does not pass through the DCI1-1 content detection procedure exists in the candidate configuration set, the target candidate configurations are filtered out for DCI1-1 content detection. And for the screened target candidate configuration, carrying out channel estimation, frequency offset estimation and time offset estimation on the target candidate configuration to obtain a frequency offset estimation value and a time offset estimation value.

In one embodiment, the time offset refers to a symbol timing deviation caused by the clock frequency inconsistency between the receiving end and the transmitting end. The time offset estimation is to estimate and evaluate the time offset in the received signal through a series of algorithms and techniques, and a common time offset estimation method may include a pilot frequency insertion method, a minimum mean square error estimation method, and the like, and the time offset value of the received signal may be obtained through the time offset estimation.

In one embodiment, the frequency offset refers to the difference between the actual frequency and the theoretical frequency of the signal, which may be caused by background errors of the transmitting end device and the receiving end device, doppler effect caused by multipath propagation, inaccuracy of the carrier oscillator, and other factors. The frequency offset estimation algorithm may include a maximum likelihood estimation method, a mean square error minimization method, and the like.

S104, when the frequency offset estimation value is smaller than a preset frequency offset threshold value and the time offset estimation value is smaller than a preset time offset threshold value, checking the target candidate configuration to obtain a configuration checking result;

in an embodiment, for the time offset estimation value and the frequency offset estimation value corresponding to each target candidate configuration, the configuration requirement can be met only by simultaneously meeting that the time offset estimation value is smaller than a preset time offset threshold value and the frequency offset estimation value is smaller than the preset frequency offset threshold value, so that the configuration requirement can be used as an available candidate configuration.

In one embodiment, equalization, rate matching, LDPC (Low Density Parity Check Code ) decoding, and CRC checking are performed on target candidate configurations meeting the above conditions.

Rate matching refers to the bits on the transmission channel being retransmitted or punctured. The number of bits in a transport channel may vary in different TTIs (Transmission Time Interval, basic time units of dynamically scheduled resources) while the configured physical channel capacity (or number of bearer bits) is fixed. Thus, when the data bits of different TTIs change, some bits in the input sequence will be retransmitted or punctured in order to match the physical channel's bearer capability, to ensure that the total bit rate after transport channel multiplexing is consistent with the configured physical channel bearer capability.

An LDPC code is one of linear block codes for correcting errors occurring during transmission. The error correction capability of the code is very close to the theoretical maximum (i.e., shannon limit). Among them, block codes, also called block codes, are one of channel coding techniques. It adds extra bits in the original message sent by the transmitting end on the premise that the bit rate does not exceed the channel capacity, so that the receiving end can decode with the minimum error rate (theoretical value is 0). The main characteristic of the block code is that its cipher length is fixed. Generally, a block code will convert an information character s containing k digits into a code character C(s) containing n digits; i.e. the block code length is n. LDPC decoding refers to that a decoding algorithm (such as a bit flipping algorithm, a belief propagation algorithm and the like) makes a decision on whether a channel output bit is 1 or 0, so that correct transmission information is obtained, and only 0 and 1 participate in operation in the decoding process.

CRC is a channel coding technique for generating a short fixed bit check code based on data such as network packets or computer files, and is mainly used for detecting or checking errors that may occur after data transmission or storage. It uses the principle of division and remainder to make error detection.

Illustratively, the CRC check procedure includes: selecting (a divisor (binary bit string) for dividing the received frame when checking at the receiving end), looking at the binary bit number (assumed to be k bits) of the selected divisor, adding k-1 bit '0' after the data frame (assumed to be m bits) to be transmitted, dividing the new frame (total m+k-1 bits) added with k-1 bits by the divisor in a mode of 'modulo 2 division', obtaining remainder (binary bit string) which is CRC check code of the frame, also called FCS (frame check sequence), attaching the check code to the back of the original data frame (m bit data frame), constructing a new frame, transmitting the new frame to the receiving end, dividing the new frame by the previous selected divisor in a mode of 'modulo 2 division' at the receiving end, if the remainder is not found, indicating that the frame has no error in transmission process, otherwise, generating error.

And S105, when the configuration verification result is that verification passes, determining that the target candidate configuration is the actual configuration of the PDCCH.

Further, when the configuration verification result is verification failure, determining that the target candidate configuration is not the true configuration of the PDCCH.

In an embodiment, if the CRC check on the target candidate configuration passes, this target candidate configuration is the correct bit sequence of DCI1-1, i.e. the actual configuration of the PDCCH. And if the verification is not passed, the target candidate configuration is not the true configuration of the PDCCH, the detection is ended, and the verification of the next target candidate configuration is carried out.

In an embodiment, as shown in fig. 4, fig. 4 is a flow chart of an implementation manner of content detection of DCI1-1 according to an embodiment of the present application. Compared with the DCI1-1 content detection flow in the prior art in FIG. 3, the method and the device screen candidate configurations which do not meet the screening conditions in the candidate configuration set in advance by adding a plurality of judging conditions, so that the content detection flow of the candidate configurations which cannot calculate configuration data is terminated in advance, the data calculation amount is reduced, and the configuration verification efficiency is improved.

The embodiment provides a content detection method of DCI1-1 of PDCCH in a 5G system, which is characterized in that each candidate configuration in a PDCCH candidate configuration set is detected, undetected target candidate configuration is screened out for verification, data processing is not performed on the detected candidate configuration, repeated detection is avoided, and content detection efficiency is improved; and the target candidate configuration is subjected to frequency offset estimation and time offset estimation, the target candidate configuration is screened according to a preset time offset threshold value and a preset frequency offset threshold value, the screened target candidate configuration meeting the condition is checked, the checked target candidate configuration is used as the real configuration of the PDCCH, and the processing flow is terminated in time if the target candidate configuration does not meet the condition, so that the data calculation amount is reduced, and the configuration checking efficiency is improved.

Referring to fig. 5, fig. 5 is a schematic flowchart of a second embodiment of a method for detecting content of DCI1-1 of PDCCH in a 5G system according to an embodiment of the present application.

As shown in fig. 5, the method for detecting the content of DCI1-1 of PDCCH in the 5G system specifically further includes steps S201 to S205.

S201, acquiring a candidate configuration set of a physical downlink control channel PDCCH;

in an embodiment, the bit sequence of DCI1-1 is obtained by performing channel estimation, equalization, de-rate matching and polarization polar decoding on the PDCCH. And (3) through exhaustion of combinations of variable fields in a bit sequence and recombination of the variable fields and fixed fields obtained through exhaustion, 12 candidate configurations of PDSCH are obtained and are used as candidate configuration sets, and the size of the sets is 12.

S202, screening each candidate configuration in the candidate configuration sets based on a preset screening condition to obtain a second candidate configuration set, wherein the second candidate configuration set comprises at least one second candidate configuration;

in an embodiment, the candidate configuration in the candidate configuration set is further screened according to a preset screening condition, the candidate configuration meeting the preset screening condition is reserved and used as the second candidate configuration, and the content detection flow is terminated if the candidate configuration does not meet the screening condition, so that the data calculation amount is reduced, and the content detection efficiency is improved.

Further, the screening the candidate configurations in the candidate configuration set based on a preset screening condition to obtain a second candidate configuration set includes: performing time offset estimation and frequency offset estimation on each candidate configuration in the candidate configuration sets to obtain the time offset estimation value and the frequency offset estimation value corresponding to each candidate configuration; and screening the second candidate configuration meeting the preset screening condition based on the time offset estimation value and the frequency offset estimation value corresponding to each candidate configuration to obtain a second candidate configuration set.

The preset screening condition is that the time offset estimated value is smaller than the time offset threshold value and the frequency offset estimated value is smaller than the frequency offset threshold value.

In an embodiment, as shown in fig. 6, the present embodiment first performs time offset estimation and frequency offset estimation on each candidate configuration in the candidate configuration set, and then screens out candidate configurations that do not meet a preset screening condition according to the results of the time offset estimation and the frequency offset estimation, so as to reduce the data calculation amount and improve the configuration verification efficiency.

In one embodiment, the time offset estimation and frequency offset estimation are performed on each candidate configuration in the candidate configuration set through a time offset estimation algorithm and a frequency offset estimation algorithm, so as to obtain a time offset estimation value and a frequency offset estimation value corresponding to each candidate configuration. Only candidate configurations that simultaneously satisfy the time offset estimate value being less than the time offset threshold and the frequency offset estimate value being less than the frequency offset threshold may be retained as second candidate configurations. Therefore, the candidate configuration which does not meet the conditions in the candidate configuration set can be screened out, and for the screened candidate configuration, the content detection flow is terminated, namely the detection flow of the unreal configuration is terminated in advance, so that the data calculation amount is reduced, and the configuration verification efficiency is improved.

Further, based on the time offset estimated value corresponding to each second candidate configuration, sorting the second candidate configurations, and determining a detection sequence corresponding to each second candidate configuration.

In an embodiment, according to the time offset estimation value corresponding to the second candidate configuration, the second candidate configurations are ranked according to the time offset from small to large, and the ranking result is used as the detection sequence of the second candidate configurations.

It can be understood that, when the time bias is smaller, the probability of checking the candidate configuration is higher, if the second candidate configuration with the smaller time bias passes the check, the second candidate configuration with the larger time bias can determine the real configuration of the PDCCH in advance without executing the check flow, thereby improving the configuration checking efficiency.

S203, detecting whether the undetected target candidate configuration exists in the second candidate configuration set;

further, based on the detection order, whether each of the second candidate configurations is the target candidate configuration that is not detected is detected.

In an embodiment, each second candidate configuration in the second candidate configuration set is detected, and the second candidate configuration which is not subjected to DCI1-1 content detection is screened out to execute a subsequent verification process, and for the second candidate configuration which is subjected to content detection, the content detection flow is terminated, so that invalid calculation is avoided, and configuration verification efficiency is improved.

S204, checking the target candidate configuration when the undetected target candidate configuration exists in the second candidate configuration set, and obtaining a configuration checking result;

in an embodiment, when the second candidate configuration set has an undetected target candidate configuration, checking each second candidate configuration sequentially in order of time offset estimation value from smaller to larger. The verification process includes equalization, rate matching, LDPC decoding, and CRC verification.

And S205, when the configuration verification result is that verification passes, determining that the target candidate configuration is the actual configuration of the PDCCH.

When the CRC of the target candidate configuration passes, it indicates that its configuration data is correct, so that the target candidate configuration is the correct bit sequence of DCI1-1, i.e. the actual configuration of the PDCCH.

In this embodiment, the time offset estimation and the frequency offset estimation are performed on each candidate configuration in the candidate configuration set, so that the candidate configuration meeting the screening condition is screened out as the second candidate configuration, the data calculation amount of the candidate configuration is reduced, and the configuration verification efficiency is improved.

Referring to fig. 7, fig. 7 is a schematic block diagram of a computer device according to an embodiment of the present application. The computer device may be a server.

With reference to FIG. 7, the computer device includes a processor, memory, and a network interface connected by a system bus, where the memory may include a non-volatile storage medium and an internal memory.

The non-volatile storage medium may store an operating system and a computer program. The computer program comprises program instructions that, when executed, cause the processor to perform any of the methods for detecting DCI1-1 content of PDCCH in 5G systems.

The processor is used to provide computing and control capabilities to support the operation of the entire computer device.

The internal memory provides an environment for the execution of a computer program in a non-volatile storage medium, which when executed by a processor, causes the processor to perform any of the methods for detecting the content of DCI1-1 of PDCCH in 5G systems.

The network interface is used for network communication such as transmitting assigned tasks and the like. It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

It should be appreciated that the processor may be a central processing unit (CentralProcessingUnit, CPU), but may also be other general purpose processors, digital signal processors (DigitalSignalProcessor, DSP), application specific integrated circuits (ApplicationSpecificIntegrateDCIrcuit, ASIC), field programmable gate arrays (Field-ProgrammableGateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Wherein in one embodiment the processor is configured to run a computer program stored in the memory to implement the steps of:

In one embodiment, the processor, when executing the computer program stored in the memory, is further configured to implement:

acquiring a candidate configuration set of a Physical Downlink Control Channel (PDCCH);

screening each candidate configuration in the candidate configuration sets based on a preset screening condition to obtain a second candidate configuration set, wherein the second candidate configuration set comprises at least one second candidate configuration;

detecting whether the target candidate configuration exists in the second candidate configuration set;

when the undetected target candidate configuration exists in the second candidate configuration set, checking the target candidate configuration to obtain a configuration checking result;

In one embodiment, when implementing the screening of each candidate configuration in the candidate configuration set based on the preset screening condition, the processor is configured to implement:

performing time offset estimation and frequency offset estimation on each candidate configuration in the candidate configuration sets to obtain the time offset estimation value and the frequency offset estimation value corresponding to each candidate configuration;

screening the second candidate configuration meeting the preset screening condition based on the time offset estimation value and the frequency offset estimation value corresponding to each candidate configuration to obtain a second candidate configuration set;

In one embodiment, after implementing the time offset estimation and frequency offset estimation on each candidate configuration in the candidate configuration set, the processor is further configured to implement:

and sorting the second candidate configurations based on the time offset estimation values corresponding to the second candidate configurations, and determining the detection sequence corresponding to the second candidate configurations.

In one embodiment, the processor, when implementing the detecting whether the target candidate configuration exists in the second candidate configuration set, is configured to implement:

based on the detection order, whether each of the second candidate configurations is the target candidate configuration that is not detected is detected.

In one embodiment, when implementing the candidate configuration set for acquiring the physical downlink control channel PDCCH, the processor is configured to implement:

acquiring a bit sequence of downlink control information DCI1-1 in the PDCCH;

acquiring a variable field and a fixed field in the bit sequence;

combining the variable fields based on an exhaustion method to obtain a variable field combination set, wherein the variable field combination set comprises at least one variable field combination;

and obtaining a candidate configuration set of the PDCCH based on the combination result of each variable field combination and the fixed field in the variable field combination set.

In one embodiment, the processor, after implementing the detecting whether there is an undetected target candidate configuration in the candidate configuration set, is further configured to implement:

and when the undetected target candidate configuration does not exist in the candidate configuration set, determining that the bit sequence of the DCI1-1 does not exist in the real configuration of the PDCCH.

In one embodiment, the processor is further configured to, after implementing the verifying the target candidate configuration when the frequency offset estimation value is smaller than a preset frequency offset threshold and the time offset estimation value is smaller than a preset time offset threshold, obtain a configuration verification result, implement:

and when the configuration verification result is that verification fails, determining that the target candidate configuration is not the true configuration of the PDCCH.

An embodiment of the present application further provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program includes program instructions, and the processor executes the program instructions to implement a method for detecting DCI1-1 of a PDCCH in any one of the 5G systems provided in the embodiments of the present application.

The computer readable storage medium may be an internal storage unit of the computer device according to the foregoing embodiment, for example, a hard disk or a memory of the computer device. The computer readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk provided on the computer device, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash memory card (FlashCard), etc.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for detecting content of DCI1-1 of PDCCH in 5G system, comprising:

2. The method for detecting the content of DCI1-1 of PDCCH in 5G system according to claim 1, further comprising:

3. The method for detecting the content of DCI1-1 of a PDCCH in a 5G system according to claim 2, wherein screening each candidate configuration in the candidate configuration sets based on a preset screening condition to obtain a second candidate configuration set includes:

4. The method for detecting DCI1-1 content of PDCCH in 5G system according to claim 3, wherein performing time offset estimation and frequency offset estimation on each candidate configuration in the candidate configuration sets, after obtaining the time offset estimation value and the frequency offset estimation value corresponding to each candidate configuration, further comprises:

5. The method for detecting the content of DCI1-1 of a PDCCH in a 5G system according to claim 4, wherein said detecting whether the target candidate configuration is not detected in the second candidate configuration set comprises:

6. The method for detecting the content of DCI1-1 of a PDCCH in a 5G system according to claim 1, wherein the obtaining the candidate configuration set of the physical downlink control channel PDCCH comprises:

acquiring a bit sequence of downlink control information DCI1-1 in the PDCCH;

acquiring a variable field and a fixed field in the bit sequence;

7. The method for detecting the content of DCI1-1 of a PDCCH in a 5G system according to claim 6, further comprising, after detecting whether there is an undetected target candidate configuration in the candidate configuration set:

8. The method for detecting DCI1-1 content of PDCCH in a 5G system according to any one of claims 1-7, wherein when the frequency offset estimation value is smaller than a preset frequency offset threshold and the time offset estimation value is smaller than a preset time offset threshold, checking the target candidate configuration, and obtaining a configuration check result, further includes:

9. A content detection apparatus for DCI1-1 of PDCCH in 5G system, comprising:

10. A computer readable storage medium, wherein the computer readable storage medium stores a computer program, which when executed by a processor causes the processor to implement the method for detecting the content of DCI1-1 of a PDCCH in a 5G system according to any one of claims 1 to 7.