CN115052358B

CN115052358B - PDCCH blind detection method, device, electronic equipment and storage medium

Info

Publication number: CN115052358B
Application number: CN202210971913.2A
Authority: CN
Inventors: 周建红; 彭剑; 张海; 陈亮
Original assignee: Nexwise Intelligence China Ltd
Current assignee: Nexwise Intelligence China Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-11-15
Anticipated expiration: 2042-08-15
Also published as: CN115052358A

Abstract

The invention provides a PDCCH blind detection method, a device, electronic equipment and a storage medium, and relates to the technical field of wireless communication, wherein the method comprises the following steps: performing parallel blind detection on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH; under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected. According to the method, the CCE data to be detected is divided into 2 CCE data sets, the candidate set corresponding to one CCE data set is subjected to parallel blind detection, and the candidate set corresponding to the other CCE data set is subjected to parallel blind detection under the condition that the blind detection fails, so that the blind detection times and the blind detection time are reduced.

Description

PDCCH blind detection method, device, electronic equipment and storage medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a PDCCH blind detection method, apparatus, electronic device, and storage medium.

Background

In a Long Term Evolution (LTE) system, a base station transmits Downlink Control Information (DCI) using a Physical Downlink Control Channel (PDCCH). The base station side does not issue information in advance, and informs a terminal/User Equipment (UE) of a DCI format, a polymerization degree grade, a time-frequency resource position and the like required by receiving the PDCCH, the UE needs to try DCI combinations with different positions, different resource lengths and different lengths to try to decode the PDCCH, namely, the UE needs to carry out all detection on possible PDCCH candidates, namely blind detection.

The conventional Common Search Space (CSS) blind detection technical scheme is to blind detect a Common Search Space in a poor Search manner, that is, in order to obtain cell-level Common control information, a UE needs to sequentially traverse and detect all PDCCH candidate sets in the Common Search Space according to a sequence of a small aggregation level to a large aggregation level, and perform operations such as rate de-matching, viterbi decoding, cyclic Redundancy Check (CRC) checking on the PDCCH candidate sets.

The LTE protocol appoints the first 16 Control Channel Element (CCE) data of the PDCCH as a common search space, performs blind detection aiming at a DCI format, and if the blind detection is performed according to aggregation levels 4 and 8, the number of blind detection times of traversing the 16 CCE data is 6 times in the worst case, the number of blind detection times is too large, and the blind detection time is too long.

Disclosure of Invention

The invention provides a PDCCH blind detection method, a PDCCH blind detection device, electronic equipment and a storage medium, which are used for overcoming the defect that the PDCCH blind detection times are too many and the time is too long in the prior art.

The invention provides a PDCCH blind detection method, which comprises the following steps:

performing parallel blind detection on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH;

under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

Optionally, the performing parallel blind detection on the first candidate set corresponding to the first CCE data set includes:

inputting each candidate set in the first candidate set into two detection modules respectively to perform parallel blind detection of different DCI formats; the detection module is a module for performing blind detection on one candidate set based on one DCI format.

Optionally, the performing parallel blind detection on the first candidate set corresponding to the first CCE data set further includes:

and under the condition that any one detection module outputs a blind detection success flag signal, resetting other detection modules which are in blind detection, and finishing the blind detection.

Optionally, before performing the parallel blind detection on the first candidate set corresponding to the first CCE data set, the method includes:

reading the first CCE data set and storing the first CCE data set;

and respectively reading the first CCE data based on the aggregation levels corresponding to the common search space to obtain the first candidate set.

Optionally, before performing the parallel blind detection on the first candidate set corresponding to the first CCE data set, the method further includes:

and performing delay alignment processing on the candidate set in the first candidate set.

Optionally, before performing the parallel blind detection on the second candidate set corresponding to the second CCE data set, the method further includes:

determining a detection result of the first candidate set;

reading the second CCE data set and storing the second CCE data set under the condition that the detection result of the first candidate set is failure;

and reading the second CCE data respectively based on the aggregation levels corresponding to the common search space to obtain the second candidate set.

The invention also provides a PDCCH blind detection device, which comprises:

the first blind test module is used for performing parallel blind test on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH;

a second blind test module, configured to perform parallel blind test on a second candidate set corresponding to a second CCE data set when a detection result of the first candidate set is failure; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

Optionally, the first blind detection module is specifically configured to: inputting each candidate set in the first candidate set into two detection modules respectively to perform parallel blind detection of different DCI formats; the detection module is a module for performing blind detection on one candidate set based on one DCI format.

The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the PDCCH blind detection method.

The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the PDCCH blind detection method as described in any of the above.

According to the PDCCH blind test method, the PDCCH blind test device, the electronic equipment and the storage medium, CCE data to be detected corresponding to a public search space are divided into 2 CCE data sets, parallel blind test is firstly carried out on the candidate set corresponding to one CCE data set, and parallel blind test is carried out on the candidate set corresponding to the other CCE data set under the condition that the blind test fails, so that the blind test times and the blind test time are reduced.

Drawings

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

Fig. 1 is a flowchart illustrating a PDCCH processing procedure in the prior art;

fig. 2 is a schematic flow chart of PDCCH blind detection in the prior art;

FIG. 3 is a second schematic diagram illustrating a PDCCH blind detection process in the prior art;

fig. 4 is a flowchart illustrating a PDCCH blind detection method according to an embodiment of the present invention;

fig. 5 is a second flowchart illustrating a PDCCH blind detection method according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a candidate set acquisition principle provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a parallel blind test provided by an embodiment of the present invention;

fig. 8 is a third flowchart illustrating a PDCCH blind detection method according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a PDCCH blind detection apparatus according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

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

In order to facilitate a clearer understanding of the embodiments of the present invention, some relevant technical knowledge will be first described as follows.

DCI information includes scheduling and control information at the system Cell (Cell) level and scheduling and control information for the User (UE) level. On the transmitting side, one PDCCH may carry one piece of DCI information, and one cell may simultaneously schedule multiple UEs in uplink and downlink, that is, multiple PDCCHs are transmitted within one subframe, and each piece of scheduling information is transmitted on an independent PDCCH. On the receiving side, the UE or other receivers need to find the PDCCH they need, demodulate, decode, and recover the DCI information they need.

Fig. 1 is a schematic flow diagram of a PDCCH processing procedure in the prior art, as shown in fig. 1, at a transmitting side, each DCI format information is multiplexed through a PDCCH channel after 16-bit CRC addition, tail-biting convolutional coding and rate matching, then is subjected to scrambling, quadrature Phase Shift Keying (QPSK) modulation, layer mapping, precoding, resource element group interleaving, resource element mapping, and then is transmitted (Transmit, TX), and then is received (Receive, RX) by a receiving side through a radio channel, the receiving side sequentially performs resource element de-mapping, resource element de-interleaving, precoding de-mapping, de-layer mapping, QPSK demodulation, and descrambling, and then enters a blind detection cycle stage, where the blind detection cycle stage includes: PDCCH CCE blind detection, rate de-matching, viterbi decoding and 16-bit CRC check until the required DCI format information is obtained.

In LTE, the minimum single PDCCH transmission unit is defined as CCE, where one CCE is equal to 9 Resource Element Groups (REGs), and one REG is equal to 4 Resource Elements (REs), where a RE is the minimum Resource unit after LTE data (including control data and user data) is modulated, and for DCI, the minimum Resource unit after control data is modulated. 1CCE equals 9REG, also 36RE. The single DCI-encoded and modulated REs are mapped to REGs, which are then mapped to CCEs. The number of CCEs occupied by a single DCI is in units of Aggregation Levels (AL) 1 or 2 or 4 or 8, and is continuously distributed in the available total CCEs of the entire subframe. The communication condition is good, the aggregation level is 1, the aggregation level is 8 when the communication condition is poor, and the communication condition is moderate, the aggregation level is 2 or 4, for example, the aggregation level 4 or 8 is generally adopted for scheduling and control information DCI at the system Cell (Cell) level.

In an LTE system, when a base station transmits DCI using a PDCCH, the base station first selects a suitable PDCCH format and performs a series of processing on DCI data according to the PDCCH format, so that the DCI data becomes an information sequence satisfying the PDCCH transmission format. The DCI formats are different, and the carried control information is also different, and the control information is mainly information about uplink scheduling request, downlink scheduling assignment, terminal power control, and the like. The DCI formats are mainly classified into 4 types according to the functions, where table 1 is a DCI format classification table, and as shown in table 1, the DCI functions corresponding to the formats DCI1A and DCI1C are scheduling common control information.

TABLE 1DCI Format Classification Table

The LTE system defines a set of PDCCH candidates for each UE to detect when parsing DCI, which is called a search space. When transmitting DCI to a UE, a base station selects an appropriate PDCCH in a search space of the UE for transmission according to factors such as channel conditions. The UE attempts to decode each PDCCH candidate in its search space according to the desired DCI format until the desired DCI data is found.

The search space is divided into a common search space and a UE-specific search space, the common search space is used for transmitting cell-level common Control information related to Paging (Paging) and Broadcast Control Channel (BCCH), and the UE-specific search space is used for transmitting UE-level Control information related to downlink shared Channel, uplink shared Channel, and the like. However, when the UE-specific search space of a certain terminal has been used up, the base station occupies the common search space to exclusively transmit the control information of the user. The common search space can only transmit smaller DCI1A and DCI1C.

Table 2 is a search space feature table, and as shown in table 2, there are only two aggregation levels corresponding to the common search space, i.e., aggregation levels 4 and 8, where the number of CCEs is 16, and in the case where the number of CCEs is the same, the PDCCH candidate number is only related to the aggregation level, the PDCCH candidate number corresponding to aggregation level 4 is 4, and the PDCCH candidate number corresponding to aggregation level 8 is 2; there are four aggregation levels corresponding to the UE-specific search space, which are aggregation levels 1, 2, 4, and 8, respectively, the number of CCEs corresponding to aggregation level 1 is 6 and the number of corresponding PDCCH candidates is 6, the number of CCEs corresponding to aggregation level 2 is 12 and the number of corresponding PDCCH candidates is 6, the number of CCEs corresponding to aggregation level 4 is 8 and the number of corresponding PDCCH candidates is 2, the number of CCEs corresponding to aggregation level 8 is 16 and the number of corresponding PDCCH candidates is 2.

Table 2 search space feature table

In general, a terminal does not know what format of DCI information is currently transmitted through a PDCCH, and does not know where information required by the terminal is located. The PDCCH blind detection is to try decoding at different resource positions in two search spaces, judge whether the PDCCH is detected according to whether the CRC check is successful, and determine DCI data, length and format for subsequent DCI analysis.

Fig. 2 is a schematic diagram illustrating a PDCCH blind detection process in the prior art, and as shown in fig. 2, the PDCCH blind detection process mainly includes rate de-matching, viterbi decoding, and CRC check.

And the terminal selects a PDCCH candidate after the PDCCH-CCE data is prepared, then performs rate de-matching on the candidate according to a required DCI format, and restores the sequence length to the length corresponding to the coded information sequence. De-rate matching is the inverse of rate matching, which mainly includes a cyclic addition operation as opposed to bit collection and clipping and a de-interleaving operation as opposed to sub-interleaving.

After completing Viterbi decoding to obtain a decoded sequence, the terminal performs CRC check on the sequence. The terminal generates a local check bit according to a cyclic redundancy check generating polynomial, then compares the check bit with a Radio Network Temporary Identity (RNTI) value issued by the base station, if the two are the same, the received DCI can be judged to be the information of the UE terminal, and then the DCI information is extracted, otherwise, the DCI information is not extracted.

The CRC check has two main functions: firstly, whether the currently detected candidate is a PDCCH adopted by a base station is verified; if the current detection candidate is the PDCCH adopted by the base station, whether the DCI carried by the candidate is wrong due to noise interference in the transmission process of the spatial channel is verified, namely when a certain PDCCH candidate passes CRC check, the terminal considers that the PDCCH candidate adopted by the base station is found and the DCI data transmitted by the candidate is accurate.

Fig. 3 is a second schematic flow chart of PDCCH blind detection in the prior art, as shown in fig. 3, 16 initial CCE data are input, the 16 initial CCE data are divided into front and rear 2 CCE data, the front 8CCE data are read and input, the front 8CCE data are subjected to blind detection based on aggregation level 4, and CSS blind detection is ended when one candidate set in 2 candidate sets of 4 CEEs is successfully blind detected; when the blind detection of all 2 candidate sets of 4CEE is not successful, the blind detection of the previous 8CCE data is carried out based on the aggregation level 8, and when the blind detection of one candidate set of 8CCE is successful, the CSS blind detection is finished; when the candidate set of the 8CCE is not successfully subjected to blind test, whether the front and back 8CCE data are traversed or not needs to be judged, when the front and back 8CCE data are not completely traversed, the back 8CCE data are read and input, the back 8CCE data are subjected to blind test of aggregation level 4, when the blind test is unsuccessful, the back 8CCE data are subjected to blind test of aggregation level 8, and when the front and back 8CCE data are completely traversed, the blind test is finished.

In the PDCCH blind detection scheme in the prior art, all PDCCH candidate sets are detected in a traversal manner according to the order of aggregation levels from small to large, and the following disadvantages exist:

(1) Considering the practical application and the limitation of processing time, full blind detection cannot be realized, that is, all DCI formats cannot be simultaneously detected in a blind manner, and only blind detection is performed on known DCI formats;

(2) The first 16 CCE data of the PDCCH are appointed to be a common search space by the LTE protocol, blind detection is carried out on a DCI format, if the blind detection is carried out according to aggregation levels 4 and 8, the number of blind detection times of traversing the 16 CCE data is 6 times under the worst condition, the number of blind detection times is too many, and the consumed time is too long.

In order to overcome the defect that the PDCCH blind detection times are too many and the time is too long in the prior art, the invention provides a PDCCH blind detection method, which is used for carrying out parallel blind detection on a candidate set so as to reduce the blind detection times and the blind detection time.

Fig. 4 is a flowchart illustrating a PDCCH blind detection method according to an embodiment of the present invention, and as shown in fig. 4, the present invention provides a PDCCH blind detection method, where the method includes:

step 401, performing parallel blind detection on a first candidate set corresponding to a first CCE data set; the first CCE data set is a set of the first 8CCE data of the 16 CCE data to be detected in the PDCCH.

Specifically, the LTE protocol stipulates that the first 16 CCE data of the PDCCH are a common search space, and therefore the 16 CCE data to be detected in the PDCCH are the first 16 CCE data in the PDCCH, that is, 16 CCE data of CCE0 to CCE 15.

Fig. 5 is a second schematic flow chart of the PDCCH blind detection method according to the embodiment of the present invention, as shown in fig. 5, the first 16 CCE data in the PDCCH are input, the 16 CCE data are divided into front and rear 2 groups of 8CCE data, the first CCE data set is a set of 8CCE data of CCE0 to CCE7, and the second CCE data set is a set of 8CCE data of CCE8 to CCE 15.

The aggregation level corresponding to the common search space is 4 or 8, the first CCE data set is divided according to the aggregation level 4, and the first CCE data set can be divided into 2 candidate sets of 4 CEE; the first CCE data set is divided by aggregation level 8 and may be divided into 1 candidate set of 8 CCEs. Therefore, there are 3 candidate sets in the first candidate set corresponding to the first CCE data set, which are 2 candidate sets of 4CEE and 1 candidate set of 8 CCEs, respectively.

And performing parallel blind detection on the 3 candidate sets in the first candidate set simultaneously, namely performing parallel blind detection on each candidate set in the first candidate set based on the DCI1A format and the DCI1C format respectively at the same time.

Step 402, performing parallel blind test on a second candidate set corresponding to a second CCE data set when the detection result of the first candidate set is failure; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

Specifically, under the condition that the checking result of each candidate set in the first candidate set is failed, the second candidate set corresponding to the second CCE data set is subjected to parallel blind checking at the same time, and the second candidate set corresponding to the second CCE data set is also 3 candidate sets, which are 2 candidate sets of 4 CEEs and 1 candidate set of 8 CCEs respectively.

And performing parallel blind detection on the 3 candidate sets in the second candidate set simultaneously, namely performing parallel blind detection on each candidate set in the second candidate set based on the DCI1A format and the DCI1C format respectively at the same time.

According to the PDCCH blind detection method provided by the embodiment of the invention, CCE data to be detected corresponding to a public search space is divided into 2 CCE data sets, parallel blind detection is firstly carried out on the candidate set corresponding to one CCE data set, and parallel blind detection is carried out on the candidate set corresponding to the other CCE data set under the condition that the blind detection fails, so that the blind detection times and the blind detection time are reduced.

reading the first CCE data set and storing the first CCE data set;

Specifically, a first CCE data set, that is, 8CCE data of CCE0 to CCE7 is read, and the first CCE data set is stored in a Random Access Memory (RAM) to prepare CCE data required for blind inspection.

And respectively reading the first 4 CCE data, the last 4 CCE data and all 8CCE data in the first CCE data set from the RAM according to aggregation levels 4 and 8, and taking the CCE data, the last 4 CCE data and all 8CCE data as 3 candidate sets for parallel blind detection, namely acquiring the first candidate set.

Fig. 6 is a schematic diagram illustrating a principle of obtaining a candidate set according to an embodiment of the present invention, and as shown in fig. 6, a first CCE data set is 8CCE data of CCE0 to CCE7, the first CCE data set is read according to aggregation level 4, and the first 4 CCE data CCE0 to CCE3 in the first CCE data set are read to obtain a candidate set 1; reading the last 4 CCE data CCE 4-CCE 7 in the first CCE data set to obtain a candidate set 2; and reading the first CCE data set according to the aggregation level 8, and reading the whole first CCE data set CCE 0-CCE 7 to obtain a candidate set 3.

According to the PDCCH blind detection method provided by the embodiment of the invention, the first CCE data is respectively read based on the aggregation level corresponding to the public search space to obtain the first candidate set, so that the parallel blind detection of each candidate set in the first candidate set is facilitated, and the blind detection times and the blind detection time are facilitated to be reduced.

Specifically, the read candidate sets 1, 2, and 3 are delay-aligned, and it is ensured that the starting time of the 1 st CCE data in the 3 candidate sets is the same, that is, the starting times of CCE0 in the candidate set 1, CCE0 in the candidate set 2, and CCE0 in the candidate set 3 are the same, and CCE0 in the candidate set 2 is also CCE4 in the first CCE data set.

According to the PDCCH blind detection method provided by the embodiment of the invention, the candidate sets in the first candidate set are subjected to delay alignment treatment, so that the parallel blind detection of 3 candidate sets in the first candidate set can be realized simultaneously, and the blind detection time is reduced.

Specifically, there are 3 candidate sets in the first candidate set, each candidate set in the first candidate set is input to two detection modules, and the two detection modules perform blind detection processing on one candidate set based on the DCI1A format and the DCI1C format, respectively. Fig. 7 is a schematic diagram of a parallel blind test principle provided in an embodiment of the present invention, and as shown in fig. 7, the first 4CEE data (candidate set 1) is respectively input into the detection module 1 and the detection module 2, the detection module 1 performs a blind test process on the candidate set 1 based on the DCI1A format, and the detection module 2 performs a blind test process on the candidate set 1 based on the DCI1C format; inputting the last 4CEE data (candidate set 2) into a detection module 3 and a detection module 4 respectively, wherein the detection module 3 performs blind detection processing on the candidate set 2 based on the DCI1A format, and the detection module 4 performs blind detection processing on the candidate set 2 based on the DCI1C format; and inputting 8CEE data (candidate set 3) into a detection module 5 and a detection module 6 respectively, wherein the detection module 5 performs blind detection processing on the candidate set 3 based on the DCI1A format, and the detection module 6 performs blind detection processing on the candidate set 3 based on the DCI1C format. The 6 detection modules input the blind detection result into an Output Register (OR). Each detection module comprises the parts of DCI length selection, rate de-matching, viterbi decoding, CRC check, RNTI calculation and check, reset generation and the like. The specific functions of the various parts are as follows:

(1) A DCI length selection section: the DCI length is selected according to the frame structure type and the bandwidth, and table 3 is a DCI length selection table, and as shown in table 3, the DCI length is related to the bandwidth and the frame structure.

Table 3DCI length selection table

(2) A rate de-matching section: and the de-rate matching process is responsible for completing the rate matching process of the data sequence from the PDCCH candidate length back to the DCI format length.

(3) A Viterbi decoding part: and decoding the soft information sequence after rate de-matching.

(4) A CRC check section: and generating a CRC bit sequence by the DCI information bit sequence output by the Viterbi decoder.

(5) And an RNTI calculation and check part: calculating the RNTI and judging the authenticity of the RNTI, wherein the specific calculation and verification process comprises the following steps: let the output bit sequence of the Viterbi decoding section be:

wherein

For the sequence of the DCI information bit,

a CRC check bit sequence scrambled by RNTI; the CRC check section outputs a CRC bit sequence as:

. CRC check bit sequence based on scrambling code

And CRC bit sequence

And obtaining 16-bit RNTI by bit modulo 2 addition:

（

16 bits RNTI highest bit) and finally whether it is the CSS space by determining whether the RNTI value is equal to 65535 or 65534.

(6) A reset generation section: when the RNTI check of a certain detection module passes, a reset signal is generated to other 5 detection modules, the other 5 detection modules are immediately reset, the ongoing blind detection processing of the detection modules is finished, and the CSS blind detection is finished.

According to the PDCCH blind detection method provided by the embodiment of the invention, one candidate set is input into two detection modules to perform parallel blind detection of different DCI formats, so that the blind detection times are reduced, and the blind detection time is correspondingly reduced.

and under the condition that any one detection module outputs a blind detection success mark signal, resetting other detection modules which are in blind detection, and finishing the blind detection.

Specifically, fig. 8 is a third schematic flow chart of the PDCCH blind detection method according to the embodiment of the present invention, as shown in fig. 8, determining whether any of the 6 detection modules has successfully blind detected, and if any of the 6 detection modules has successfully blind detected, that is, any of the 6 detection modules outputs a blind detection success flag signal, resetting the other detection modules that are performing blind detection, and immediately ending the blind detection.

According to the PDCCH blind detection method provided by the embodiment of the invention, by introducing a reset mechanism, namely when one detection module successfully detects DCI information, other detection modules which are detecting are reset, and the blind detection is immediately finished, the blind detection is rapidly completed, the blind detection time of useless DCI formats is reduced, and the blind detection efficiency is improved.

determining a detection result of the first candidate set;

Specifically, after the blind detection of the detection module is completed for all 3 candidate sets in the first candidate set, the detection results of the 3 candidate sets in different DCI formats are determined.

If the detection results of the 3 candidate sets in different DCI formats are all failure, whether the front 8CCE data (a first CCE data set) and the back 8CCE data (a second CCE data set) are subjected to blind detection is judged, if the front 8CCE data and the back 8CCE data are not subjected to blind detection, the blind detection is only carried out on the front 8CCE data, and the blind detection is not carried out on the back 8CCE data, the second CCE data set, namely the 8CCE data of CCE 8-CCE 15, is read, the second CCE data set is stored into a Random Access Memory (RAM), and CCE data required by the blind detection are prepared.

And respectively reading the first 4 CCE data, the last 4 CCE data and all 8CCE data in the second CCE data set from the RAM according to aggregation levels 4 and 8, and taking the CCE data, the last 4 CCE data and all 8CCE data as 3 candidate sets of parallel blind detection, namely acquiring the second candidate set. And performing delay alignment on the read 3 candidate sets to ensure that the starting time of the 1 st CCE data in the 3 candidate sets is the same.

As shown in fig. 6, the second CCE data set is 8CCE data of CCE8 to CCE15, the second CCE data set is read according to the aggregation level 4, and the first 4 CCE data of CCE8 to CCE11 in the second CCE data set are read to obtain a candidate set 4; reading the last 4 CCE data CCE 12-CCE 15 in the first CCE data set to obtain a candidate set 5; and reading the second CCE data set according to the aggregation level 8, and reading the whole second CCE data set CCE 8-CCE 15 to obtain a candidate set 6.

In the parallel blind detection process, 6 detection modules are also used to perform parallel blind detection on candidate sets 4, 5, and 6, and 2 detection modules perform blind detection on one candidate set based on different DCI formats.

In the 6 detection modules for performing parallel blind detection on the candidate sets 4, 5 and 6, when the blind detection of any detection module is successful, namely any detection module outputs a blind detection success mark signal, resetting other detection modules performing blind detection, and immediately finishing the blind detection; and when the 6 detection modules all output the blind detection failure mark signals, the blind detection is also finished.

According to the PDCCH blind detection method provided by the embodiment of the invention, under the condition of blind detection and failure detection of the first 8CCE data, the candidate set corresponding to the last 8CCE data is obtained, so that the parallel blind detection of the last 8CCE data is favorably carried out, the blind detection times are reduced from 12 times to 2 times, the reduction of the blind detection times is favorably realized, and the blind detection time is reduced.

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

Fig. 9 is a schematic structural diagram of a PDCCH blind detection apparatus according to an embodiment of the present invention, and as shown in fig. 9, the present invention provides a PDCCH blind detection apparatus, including: a first blind test module 901 and a second blind test module 902; wherein:

a first blind test module 901, configured to perform parallel blind test on a first candidate set corresponding to a first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH;

a second blind test module 902, configured to perform parallel blind test on a second candidate set corresponding to a second CCE data set when a detection result of the first candidate set is failure; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

Optionally, the first blind inspection module 901 is specifically configured to: inputting each candidate set in the first candidate set into two detection modules respectively to perform parallel blind detection of different DCI formats; the detection module is a module for performing blind detection on one candidate set based on one DCI format.

Optionally, the apparatus further comprises a reset module; and the resetting module is used for resetting other detection modules which are in blind detection under the condition that any detection module outputs a blind detection success mark signal, and ending the blind detection.

Optionally, the apparatus further comprises a reading module and an obtaining module; wherein:

the first reading module is configured to read the first CCE data set and store the first CCE data set;

the first obtaining module is configured to respectively read the first CCE data based on aggregation levels corresponding to a common search space, and obtain the first candidate set.

Optionally, the apparatus further comprises a delay alignment module; and the delay alignment module is used for performing delay alignment processing on the candidate set in the first candidate set.

Optionally, the apparatus further includes a determining module, a second reading module, and a second obtaining module; wherein:

the determining module is configured to determine a detection result of the first candidate set;

the second reading module is configured to, if the detection result of the first candidate set is a failure, read the second CCE data set and store the second CCE data set;

and a second obtaining module, configured to respectively read the second CCE data based on the aggregation level corresponding to the common search space, and obtain the second candidate set.

Specifically, the PDCCH blind inspection apparatus provided in this embodiment of the present application can implement all the method steps implemented by the foregoing method embodiments, and can achieve the same technical effects, and details of the same parts and beneficial effects as those of the method embodiments in this embodiment are not described herein again.

Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 10, the electronic device may include: a processor (processor) 1010, a communication Interface (Communications Interface) 1020, a memory (memory) 1030, and a communication bus 1040, wherein the processor 1010, the communication Interface 1020, and the memory 1030 communicate with each other via the communication bus 1040. Processor 1010 may invoke logic instructions in memory 1030 to perform a PDCCH blind detection method comprising: performing parallel blind detection on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH; under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

Furthermore, the logic instructions in the memory 1030 can be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product, the computer program product includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, when the computer program is executed by a processor, a computer can execute the PDCCH blind detection method provided by the above methods, and the method includes: performing parallel blind detection on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH; under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the PDCCH blind detection method provided by the above methods, the method including: performing parallel blind detection on a first candidate set corresponding to the first CCE data set; the first CCE data set is a set of the first 8CCE data in the 16 CCE data to be detected in the PDCCH; under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of the last 8CCE data of the 16 CCE data to be detected.

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

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

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

Claims

1. A PDCCH blind detection method is characterized by comprising the following steps:

under the condition that the detection result of the first candidate set is failure, performing parallel blind detection on a second candidate set corresponding to a second CCE data set; the second CCE data set is a set of last 8CCE data in the 16 CCE data to be detected;

the performing parallel blind detection on the first candidate set corresponding to the first CCE data set includes:

2. The PDCCH blind detection method according to claim 1, wherein the performing of the parallel blind detection on the first candidate set corresponding to the first CCE data set further comprises:

3. The PDCCH blind detection method according to claim 1, wherein before performing the parallel blind detection on the first candidate set corresponding to the first CCE data set, the method comprises:

reading the first CCE data set and storing the first CCE data set;

4. The PDCCH blind detection method of claim 3, wherein before performing the parallel blind detection on the first candidate set corresponding to the first CCE data set, the method further comprises:

5. The PDCCH blind detection method according to claim 1, wherein before performing the parallel blind detection on the second candidate set corresponding to the second CCE data set, the method further comprises:

determining a detection result of the first candidate set;

6. A PDCCH blind detection device, comprising:

a second blind test module, configured to perform parallel blind test on a second candidate set corresponding to a second CCE data set when a detection result of the first candidate set is failure; the second CCE data set is a set of the last 8CCE data in the 16 CCE data to be detected;

the first blind detection module is specifically configured to: inputting each candidate set in the first candidate set into two detection modules respectively to perform parallel blind detection of different DCI formats; the detection module is a module for performing blind detection on one candidate set based on one DCI format.

7. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the PDCCH blind detection method according to any one of claims 1 to 5 when executing the computer program.

8. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the PDCCH blind detection method according to any of claims 1 to 5.