CN109660315B - PDCCH blind detection method and device based on DMRS, storage medium and user equipment - Google Patents
PDCCH blind detection method and device based on DMRS, storage medium and user equipment Download PDFInfo
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Abstract
A PDCCH blind detection method and device based on DMRS, a storage medium and user equipment are disclosed, the method comprises the following steps: determining candidate PDCCHs from a search space of a control resource set; calculating a channel estimation value of a DMRS resource unit of the candidate PDCCH; calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource unit of the candidate PDCCH; and performing blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH. By the technical scheme provided by the invention, the PDCCH blind test speed can be accelerated, the PDCCH blind test complexity is reduced, and the resource overhead and the power consumption of user equipment are saved.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a PDCCH blind detection method and device based on DMRS, a storage medium and user equipment.
Background
In the conclusion of the 3rd Generation Partnership Project (3 GPP) Radio Access Network working group one (Radio Access Network working group1, RAN1 for short) 86 th conference (#86b), it includes that "DeModulation Reference Signal (DMRS for short) is Physical Downlink Control Channel-specific (PDCCH-specific for short) and/or User Equipment-specific (UE-specific for short)". In the 3GPP RAN1 New Radio (NR) first time Ad Hoc #1 (AH #1), an "NR Control Channel Element (CCE) including a UE-specific DMRS Resource Element (Resource Element)" for demodulating the NRCCE is included. As can be seen, NR is highly likely to support UE-specific DMRSs to receive PDCCH.
At present, no technical scheme for PDCCH blind detection (also called blind demodulation or blind decoding) based on UE-specific DMRS exists. In the existing Long Term Evolution (LTE) technology, a PDCCH performs blind detection based on a Common Reference Signal (CRS). The CRS is a cell-level reference signal, that is, all UEs in the same cell use the same CRS, so that when a UE performs PDCCH blind detection, it cannot determine whether the PDCCH is transmitted to the UE or other UEs, and the UE needs to perform blind detection as long as there is a candidate PDCCH. Furthermore, Aggregation Levels (AL) supported in the existing LTE technology are 1, 2, 4, and 8, and the NR technology also supports at least 1, 2, 4, and 8, and is likely to support higher Aggregation levels, such as 16 and 32. If the NR directly adopts a PDCCH blind detection method in the LTE technology, the NR cannot fully utilize the characteristics of the UE specific DMRS, and the blind detection complexity is high.
Disclosure of Invention
The technical problem to be solved by the invention is how to perform PDCCH blind test based on DMRS so as to reduce the complexity of PDCCH blind test.
In order to solve the above technical problem, an embodiment of the present invention provides a PDCCH blind test method based on DMRS, where the PDCCH blind test method includes: determining candidate PDCCHs from a search space of a control resource set; calculating a channel estimation value of a DMRS resource unit of the candidate PDCCH; calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource unit of the candidate PDCCH; and performing blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH.
Optionally, the performing blind detection on at least a part of the candidate PDCCHs according to the average power of each candidate PDCCH includes: and sequencing the candidate PDCCHs according to the descending order of the average power of each candidate PDCCH, and performing blind detection on each candidate PDCCH according to the sequencing result.
Optionally, the performing blind detection on at least a part of the candidate PDCCHs according to the average power of each candidate PDCCH includes: and performing blind detection on the candidate PDCCHs with the average power higher than a preset threshold value.
Optionally, the step of calculating a channel estimation value of the DMRS resource element of the candidate PDCCH includes: determining a control channel element index corresponding to the candidate PDCCH in the search space; determining a resource unit group bundle corresponding to a control channel unit pointed by the control channel unit index according to the mapping relation between the control channel unit and the resource unit group; and calculating the channel estimation value of the DMRS resource unit of each resource unit group in the resource unit group bundle.
Optionally, the indexes of the control channel elements corresponding to the candidate PDCCHs are arranged continuously.
Optionally, the step of calculating the average power of each candidate PDCCH according to the channel estimation values of the DMRS resource elements of the candidate PDCCHs includes: calculating an average channel estimation value of the resource element group according to the channel estimation value of the DMRS resource element; calculating the average power of each control channel unit according to the average power of each resource unit group bundle and the number of the resource unit group bundles, wherein the average power of the resource unit group bundles is calculated according to the average channel estimation value of the resource unit group bundles; and calculating the average power of each candidate PDCCH according to the average power of each control channel unit and the control channel units contained in each candidate PDCCH.
Optionally, the control resource set is configured by higher layer signaling or system messages.
In order to solve the above technical problem, an embodiment of the present invention provides a PDCCH blind detection device based on DMRS, where the PDCCH blind detection device includes: a determining module adapted to determine a PDCCH candidate from a search space of a set of control resources; a first calculation module, adapted to calculate a channel estimation value of a DMRS resource element of the candidate PDCCH; the second calculation module is suitable for calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource elements of the candidate PDCCH; and the blind detection module is suitable for carrying out blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH.
Optionally, the blind detection module includes: and the sequencing blind detection sub-module is suitable for sequencing the candidate PDCCHs according to the descending order of the average power of each candidate PDCCH and carrying out blind detection on each candidate PDCCH according to the sequencing result.
Optionally, the blind detection module further includes: and the screening blind detection sub-module is suitable for carrying out blind detection on the candidate PDCCH with the average power higher than a preset threshold value.
Optionally, the first computing module includes: a first determining submodule, adapted to determine a control channel element index corresponding to a candidate PDCCH in the search space; the second determining submodule is suitable for determining a resource unit group bundle corresponding to the control channel unit pointed by the control channel unit index according to the mapping relation between the control channel unit and the resource unit group; and the first calculation submodule is suitable for calculating the channel estimation value of the DMRS resource elements of each resource element group in the resource element group bundle.
Optionally, the indexes of the control channel elements corresponding to the candidate PDCCHs are arranged continuously.
Optionally, the second computing module includes: a second calculation submodule, adapted to calculate an average channel estimation value of the resource element group bundle according to the channel estimation value of the DMRS resource element; the third calculation submodule is suitable for calculating the average power of each control channel unit according to the average power of each resource unit group bundle and the number of the resource unit group bundles, and the average power of the resource unit group bundles is calculated according to the average channel estimation value of the resource unit group bundles; and the fourth calculation submodule is suitable for calculating the average power of each candidate PDCCH according to the average power of each control channel unit and the control channel units contained in each candidate PDCCH.
Optionally, the control resource set is configured by higher layer signaling or system messages.
In order to solve the above technical problem, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the PDCCH blind detection method are executed.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a user equipment, which includes a memory and a processor, where the memory stores computer instructions executable on the processor, and is characterized in that the processor executes the computer instructions to perform the steps of the PDCCH blind detection method.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the technical scheme provided by the embodiment of the invention firstly determines the candidate PDCCH from the search space of the control resource set, the number of CCEs in the control resource set can be determined according to the control resource set configured by a high-level signaling or a system message, and the candidate PDCCH in the search space can be determined according to a User Equipment identifier (UE ID for short), the aggregation level of the CCEs and the number of the corresponding candidate PDCCHs; secondly, calculating a channel estimation value of the DMRS resource unit of the candidate PDCCH; then, according to the channel estimation value of the DMRS resource unit of the candidate PDCCH, the average power of each candidate PDCCH can be calculated; and then performing blind detection on at least one part of candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH. Different UE can be distinguished based on the specific DMRS of the UE, so that the candidate PDCCH can be subjected to blind detection in a targeted manner according to the average power of each candidate PDCCH, the PDCCH blind detection speed is increased, the PDCCH blind detection complexity is reduced, and the resource overhead and the power consumption of user equipment can be saved.
Further, the candidate PDCCHs are sequenced according to the descending order of the average power of each candidate PDCCH, and each candidate PDCCH is subjected to blind detection according to the sequencing result. Based on the characteristics of the specific DMRS of the UE, the candidate PDCCH with high average power is preferentially subjected to blind detection, the success probability of detecting the PDCCH can be improved, the PDCCH blind detection is terminated in advance, the PDCCH blind detection speed is improved, the PDCCH blind detection complexity is reduced, and therefore the resource overhead and the power consumption of user equipment can be saved.
And further, performing blind detection on the candidate PDCCH with the average power higher than a preset threshold, and skipping the blind detection of the candidate PDCCH if the average power of the candidate PDCCH is lower than the threshold, and comparing the average power of the next candidate PDCCH with the preset threshold so as to save the resource overhead and the power consumption of the user equipment.
Drawings
Fig. 1 is a flowchart illustrating a PDCCH blind detection method based on DMRS according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating one embodiment of step S102 in FIG. 1;
fig. 3 is a schematic structural diagram of a PDCCH blind detection apparatus based on DMRS according to an embodiment of the present invention.
Detailed Description
As understood by those skilled in the art, as for the background art, NR is studying that DMRS of PDCCH is UE-specific DMRS, and there is no technical solution in the prior art for PDCCH blind detection based on UE-specific DMRS to reduce PDCCH blind detection complexity.
The inventor of the present application finds, through research and study, that since the target UE can identify the DMRS specific to the target UE but other UEs cannot, the candidate PDCCH sent to the target UE can be identified by using the DMRS sequence specific to the UE to detect the PDCCH.
The technical scheme provided by the embodiment of the invention firstly determines the candidate PDCCH from the search space of the control resource set, the number of CCEs in the control resource set can be determined according to the control resource set configured by high-level signaling or system information, and the candidate PDCCH in the search space can be determined according to the user equipment identification, the aggregation level of the CCEs and the number of the corresponding candidate PDCCH; secondly, calculating a channel estimation value of the DMRS resource unit of the candidate PDCCH; then, according to the channel estimation value of the DMRS resource unit of the candidate PDCCH, the average power of each candidate PDCCH can be calculated; then, different UEs can be distinguished based on the UE specific DMRS, so that at least one part of candidate PDCCHs can be subjected to blind detection in a targeted manner according to the average power of each candidate PDCCH to detect the PDCCH, the PDCCH blind detection speed is further improved, the PDCCH blind detection complexity is reduced, and the resource overhead and the power consumption of user equipment can be saved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart illustrating a PDCCH blind detection method based on DMRS according to an embodiment of the present invention. The blind detection method shown in fig. 1 may be used on one side of a user equipment, and the steps of the blind detection method may include:
step S101: determining candidate PDCCHs from a search space of a control resource set;
step S102: calculating a channel estimation value of a DMRS resource unit of the candidate PDCCH;
step S103: calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource unit of the candidate PDCCH;
step S104: and performing blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH.
Specifically, a UE may have one or more Control Resource SETs (CORESET). In step S101, the UE may learn the number and configuration information of the CORESET from a higher layer signaling (e.g., a Radio Resource Control (RRC) signaling) or a system message, and may calculate the number of CCEs in each CORESET according to a time-frequency Resource in the configuration information of the CORESET. Each candidate PDCCH consists of one or more CCEs, and the number of CCEs constituting the PDCCH is referred to as an aggregation level. The UE may know the aggregation level set of PDCCHs and the number of PDCCH candidates corresponding to each aggregation level from the signaling configuration. On the premise that the UE ID is known, the initial CCE index can be calculated by referring to a calculation formula of the initial CCE index of the PDCCH candidate in LTE, and all PDCCH candidates can be known because the CCE indexes are continuous. It is understood by the skilled person that if the NR technology still in question determines the calculation of the NR CCE starting index formula, the calculation formula given by LTE may be replaced by the determined NR CCE starting index calculation formula.
Further, in step S102, the UE may acquire a Resource Element Group bundle (REG bundle for short) of the PDCCH candidate according to the CCE-REG mapping relationship in the configuration information of the CORESET. In 3GPP RAN1#88b conferences, the agreement agreed on REG bundles is that within one REG bundle, the UE may assume that REGs employ the same precoding, the REGs being time and/or frequency consecutive. Specifically, when the CORESET length is 1 symbol (symbol), the REG bundle contains 2 or 6 REGs; when the CORESET length is 2 symbols, the REG bundle contains 2 or 6 REGs; when the CORESET length is 3 symbols, the REG bundle contains 3 or 6 REGs. The UE can know the number of REGs contained in the REG bundle according to the configuration information of CORESET, one REG contains 12 REs according to NR physical layer protocol and 3GPP conference conclusion, wherein 1/4 is DMRS RE, and the DMRS RE are uniformly distributed in the REG, and the time-frequency position of the DMRS RE corresponding to the candidate PDCCH can be obtained, thereby calculating the channel estimation value of the DMRS RE.
In a specific implementation, referring to fig. 2, the step of calculating the channel estimation value of the DMRS RE in step S102 may include:
step S1021: determining a control channel element index corresponding to the candidate PDCCH in the search space;
step S1022: determining a resource unit group bundle corresponding to a control channel unit pointed by the control channel unit index according to the mapping relation between the control channel unit and the resource unit group;
step S1023: and calculating the channel estimation value of the DMRS resource unit of each resource unit group in the resource unit group bundle.
Specifically, in step S1021, the UE may know the number and configuration information of the CORESET from the RRC signaling or the system message, know the UE ID, refer to a calculation formula of the starting CCE index of the PDCCH candidate in LTE, and may calculate the CCE index corresponding to the PDCCH candidate in the CORESET search space.
Further, in step S1022, after the UE calculates the CCE index corresponding to the PDCCH candidate, the time-frequency location of the REG bundle can be known through a CCE-REG mapping method (the mapping refers to interleaving or non-interleaving). The CCE includes several REG bundles depending on the number of REGs contained by a single REG bundle, but the number of REGs contained by one CCE is determined, for example, one CCE contains 6 REGs in NR.
Further, in step S1023, based on UE-specific DMRS, which can calculate channel estimates for all DMRS REs contained in the REG bundle. Since all REGs within a REG bundle are time and/or frequency contiguous, the number and location of REGs constituting the PDCCH candidate, and the number and location of corresponding DMRS REs, can be known. Specifically, the NR physical layer protocol specifies that a UE may have one or more CORESET, and the size of a REG bundle, i.e., the number of REGs within one REG bundle, may be obtained in the CORESET configuration. One REG in NR contains 12 REs, corresponding to one physical resource block in frequency domain and one symbol (symbol) in time domain. According to the 3GPP conference conclusion, the PDCCH corresponds to a DMRS density of 1/4, and DMRS REs are uniformly distributed within a REG, i.e., there are 3 DMRS REs within one REG. From this, the number of DMRS REs within one REG bundle is
Wherein SREGRefers to the number of REGs within one REG bundle. And the time-frequency position of the DMRS RE can be obtained by integrating the CCE, the REG bundle, the CCE-REG mapping mode, the DMRS density and the distribution, and the channel estimation value of the DMRS RE can be calculated according to the channel measurement result.
Further, in step S103, an average channel estimation value of the REG bundle can be obtained according to the channel estimation value of the DMRS RE, the number of REGs included in the REG bundle, and the number of dmrres obtained in step S102, so as to obtain an average power of the REG bundle, and further, the average power of the CCE is calculated according to the CCE-REG mapping relationship. And calculating the average power of each candidate PDCCH by combining the determined CCE starting index position and the PDCCH aggregation level.
Preferably, after obtaining the channel estimation values of the DMRS REs, the average power of each PDCCH candidate may be calculated, and the calculation process may include the following steps: firstly, according to the channel estimation value of the DMRS RE, the number of REGs contained in the REG bundle and the number of DMRSRE, the average channel estimation value of the REG bundle can be obtained; then, according to the average channel estimation value of the REG bundle, the average power of each REG bundle can be directly calculated; then, calculating the average power of each CCE according to the average power of each REG bundle and the number of the REG bundles; and finally, calculating the average power of each candidate PDCCH according to the average power of each CCE and the CCE contained in each candidate PDCCH.
As a non-limiting example, the UE may know from the signaling configuration that the aggregation level set is {1, 2, 4, 8, 16, 32}, and the number of PDCCH candidates corresponding to each aggregation level in the aggregation level set is }
By using
Indicates the number of CCEs contained in the mth PDCCH candidate,
by using
Indicates the number of REG bundles contained in one CCE; by using
Indicates the number of DMRS REs within one REG bundle. Under this condition, the pseudo code for calculating the average power of each PDCCH candidate from the channel estimation values of DMRS REs may be represented as follows:
for AL ∈ {1, 2, 4, 8, 16, 32} (polymerization grade)
Calculating a channel estimate Hm,j,i,l
end
Calculating an average channel estimation value of all DMRS REs in the ith REG bundle of the jth CCE in the mth candidate PDCCH:
end
calculating the average power of the jth CCE in the mth candidate PDCCH:
end
calculating the average power of the mth candidate PDCCH:
end
end
further, in step S104, different UEs can be distinguished based on the UE-specific DMRS, so that at least a portion of candidate PDCCHs can be specifically blind-detected according to the average power of each candidate PDCCH to detect a PDCCH. The blind detection may include the steps of rate de-matching, channel decoding, descrambling a Radio Network Temporary Identity (RNTI), and the like, and the detailed calculation process may refer to the PDCCH blind detection method in the existing LTE.
As a non-limiting example, after knowing the average power of each PDCCH candidate, the UE may sort the PDCCH candidates according to a descending order of the average power of each PDCCH candidate, and preferentially blind-detect PDCCH candidates with high average power according to the sorting result. If the blind test is successful, stopping the blind test; otherwise, if the blind test fails, the blind test is not abandoned before the PDCCH is detected, and the blind test is continuously carried out on the candidate PDCCH which is sequenced later.
The average power of the UE may be obtained through simulation and multiple statistics, and if the average power is used as a preset threshold, as another non-limiting example, only the candidate PDCCH with the average power higher than the preset threshold may be blind-detected in the process of blind-detecting the candidate PDCCH. Since the DMRS is UE-specific and the preset threshold is calculated according to the UE-specific DMRS, when the average power of the candidate PDCCH is smaller than the threshold, it may be determined that the received candidate PDCCH is not sent to the target UE. Under the condition, if the average power of one candidate PDCCH is lower than the preset threshold, the subsequent blind detection process can be skipped, so as to save the power consumption of the target UE.
Fig. 3 is a schematic structural diagram of a PDCCH blind detection apparatus based on DMRS according to an embodiment of the present invention. The PDCCH blind detection apparatus 3 may be applied to one side of the user equipment. Those skilled in the art understand that the PDCCH blind detection apparatus 3 according to this embodiment may be used to implement the PDCCH blind detection method technical solution described in the above embodiment shown in fig. 1.
In a specific implementation, the PDCCH blind detection apparatus 3 may include: a determination module 31, a first calculation module 32, a second calculation module 33 and a blind detection module 34. In a specific implementation, the determining module 31 may be adapted to determine a PDCCH candidate from a search space of a control resource set; the first calculation module 32 may be adapted to calculate channel estimates for DMRS resource elements of the candidate PDCCH; the second calculating module 33 may be adapted to calculate the average power of each candidate PDCCH according to the channel estimation values of the DMRS resource elements of the candidate PDCCH; the blind detection module 34 may be adapted to perform blind detection on at least a part of the PDCCH candidates according to the average power of each PDCCH candidate to detect the PDCCH.
Preferably, the blind detection module 34 may include an ordering blind detection module 341. The sorting blind detection sub-module 341 is adapted to sort the PDCCH candidates in a descending order of their average power, and perform blind detection on the PDCCH candidates according to the sorting result.
As a preferred variation, the blind test module 34 may include a screening blind test sub-module 342. The screening blind detection sub-module 342 is adapted to perform blind detection on candidate PDCCHs with an average power higher than a preset threshold.
Further, the first calculation module 32 may include: a first determination submodule 321, a second determination submodule 322 and a first calculation submodule 323. Specifically, the first determining submodule 321 is adapted to determine a control channel element index corresponding to a PDCCH candidate in the search space; the second determining submodule 322 is adapted to determine, according to a mapping relationship between a control channel element and a resource element group, a resource element group bundle corresponding to the control channel element pointed by the control channel element index; the first calculating sub-module 323 is adapted to calculate channel estimation values of DMRS resource elements of each resource element group in the resource element group bundle.
Further, the control channel element indexes corresponding to the candidate PDCCHs are arranged continuously.
Further, the second calculation module 33 may include: a second computation submodule 331, a third computation submodule 332 and a fourth computation submodule 333. The second calculating sub-module 331 is adapted to calculate an average channel estimation value of the resource element group bundle according to the channel estimation values of the DMRS resource elements; the third calculating sub-module 332 is adapted to calculate an average power of each control channel unit according to an average power of each resource unit group bundle and the number of the resource unit group bundles, where the average power of the resource unit group bundle is calculated according to an average channel estimation value of the resource unit group bundle; the fourth calculating sub-module 333 is adapted to calculate the average power of each candidate PDCCH according to the average power of each control channel element and the control channel elements included in each candidate PDCCH.
Further, the set of control resources is configured by higher layer signaling or system messages.
Those skilled in the art understand that the PDCCH blind detection apparatus 3 according to this embodiment can be used to implement the technical solution of the method described in the above embodiment shown in fig. 1. For more details of the operation principle and the operation mode of the PDCCH blind detection apparatus 3, reference may be made to the related descriptions in fig. 1 to fig. 2, which are not repeated herein.
Further, the embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the PDCCH blind detection method in any one of the embodiments shown in fig. 1 are executed. Preferably, the storage medium may include a computer-readable storage medium. Preferably, the storage medium may include ROM, RAM, magnetic or optical disks, or the like.
Further, an embodiment of the present invention further discloses a user equipment, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to execute the steps of the PDCCH blind detection method in the embodiments shown in fig. 1 to fig. 2.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (16)
1. A PDCCH blind detection method based on DMRS is characterized by comprising the following steps:
determining candidate PDCCHs from a search space of a control resource set, comprising: acquiring the number and configuration information of the control resource sets from a high-level signaling or a system message, and calculating the number of control channel units in each control resource set according to time-frequency resources in the configuration information of the control resource sets; determining the candidate PDCCH according to the user equipment identification, the number of the control channel units and the number of the corresponding candidate PDCCH;
calculating a channel estimation value of a DMRS resource unit of the candidate PDCCH;
calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource unit of the candidate PDCCH;
and performing blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH.
2. The PDCCH blind detection method of claim 1, wherein the blind detection of at least a part of the PDCCH candidates according to the average power of each PDCCH candidate comprises:
and sequencing the candidate PDCCHs according to the descending order of the average power of each candidate PDCCH, and performing blind detection on each candidate PDCCH according to the sequencing result.
3. The PDCCH blind detection method of claim 1, wherein the blind detection of at least a part of the PDCCH candidates according to the average power of each PDCCH candidate comprises:
and performing blind detection on the candidate PDCCHs with the average power higher than a preset threshold value.
4. The PDCCH blind detection method of claim 1, wherein the calculating of the channel estimation values of the DMRS resource elements of the candidate PDCCH comprises:
determining a control channel element index corresponding to the candidate PDCCH in the search space;
determining a resource unit group bundle corresponding to a control channel unit pointed by the control channel unit index according to the mapping relation between the control channel unit and the resource unit group;
and calculating the channel estimation value of the DMRS resource unit of each resource unit group in the resource unit group bundle.
5. The PDCCH blind detection method of claim 4, wherein the indexes of the control channel elements corresponding to the PDCCH candidates are continuously arranged.
6. The PDCCH blind detection method of claim 1, wherein the calculating of the average power of each PDCCH candidate according to the channel estimation values of the DMRS resource elements of the PDCCH candidates comprises:
calculating an average channel estimation value of the resource element group according to the channel estimation value of the DMRS resource element;
calculating the average power of each control channel unit according to the average power of each resource unit group bundle and the number of the resource unit group bundles, wherein the average power of the resource unit group bundles is calculated according to the average channel estimation value of the resource unit group bundles;
and calculating the average power of each candidate PDCCH according to the average power of each control channel unit and the control channel units contained in each candidate PDCCH.
7. The PDCCH blind detection method according to claim 1, wherein said control resource set is configured by higher layer signaling or system message.
8. A PDCCH blind detection device based on DMRS is characterized by comprising:
a determination module adapted to determine PDCCH candidates from a search space of a set of control resources, comprising: acquiring the number and configuration information of the control resource sets from a high-level signaling or a system message, and calculating the number of control channel units in each control resource set according to time-frequency resources in the configuration information of the control resource sets; determining the candidate PDCCH according to the user equipment identification, the number of the control channel units and the number of the corresponding candidate PDCCH;
a first calculation module, adapted to calculate a channel estimation value of a DMRS resource element of the candidate PDCCH;
the second calculation module is suitable for calculating the average power of each candidate PDCCH according to the channel estimation value of the DMRS resource elements of the candidate PDCCH;
and the blind detection module is suitable for carrying out blind detection on at least one part of the candidate PDCCHs according to the average power of each candidate PDCCH so as to detect the PDCCH.
9. The PDCCH blind detection apparatus of claim 8, wherein the blind detection module comprises:
and the sequencing blind detection sub-module is suitable for sequencing the candidate PDCCHs according to the descending order of the average power of each candidate PDCCH and carrying out blind detection on each candidate PDCCH according to the sequencing result.
10. The PDCCH blind detection apparatus of claim 8, wherein the blind detection module comprises:
and the screening blind detection sub-module is suitable for carrying out blind detection on the candidate PDCCH with the average power higher than a preset threshold value.
11. The PDCCH blind detection apparatus according to claim 8, wherein said first calculating module comprises:
a first determining submodule, adapted to determine a control channel element index corresponding to a candidate PDCCH in the search space;
the second determining submodule is suitable for determining a resource unit group bundle corresponding to the control channel unit pointed by the control channel unit index according to the mapping relation between the control channel unit and the resource unit group;
and the first calculation submodule is suitable for calculating the channel estimation value of the DMRS resource elements of each resource element group in the resource element group bundle.
12. The PDCCH blind detection apparatus of claim 11, wherein the control channel element indexes corresponding to the PDCCH candidates are arranged consecutively.
13. The PDCCH blind detection apparatus according to claim 11, wherein said second calculation module comprises:
a second calculation submodule, adapted to calculate an average channel estimation value of the resource element group bundle according to the channel estimation value of the DMRS resource element;
the third calculation submodule is suitable for calculating the average power of each control channel unit according to the average power of each resource unit group bundle and the number of the resource unit group bundles, and the average power of the resource unit group bundles is calculated according to the average channel estimation value of the resource unit group bundles;
and the fourth calculation submodule is suitable for calculating the average power of each candidate PDCCH according to the average power of each control channel unit and the control channel units contained in each candidate PDCCH.
14. The PDCCH blind detection apparatus of claim 8, wherein the set of control resources is configured by higher layer signaling or system messages.
15. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the PDCCH blind detection method according to any of claims 1 to 7.
16. A user equipment comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the PDCCH blind detection method according to any of claims 1 to 7.
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Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294150B (en) | 2019-07-05 | 2021-02-05 | 北京紫光展锐通信技术有限公司 | Physical downlink control channel blind detection method, user equipment and readable storage medium |
| CN112398578B (en) * | 2019-08-15 | 2022-04-26 | 大唐移动通信设备有限公司 | Method and device for detecting Physical Downlink Control Channel (PDCCH) and terminal |
| WO2021027426A1 (en) * | 2019-08-15 | 2021-02-18 | 大唐移动通信设备有限公司 | Method and apparatus for detecting physical downlink control channel (pdcch), and terminal |
| CN112398575B (en) * | 2019-08-16 | 2022-04-12 | 华为技术有限公司 | Method, device, medium and chip for transmitting side link channel state information |
| CN113115448B (en) * | 2020-01-13 | 2023-04-07 | 维沃移动通信有限公司 | Method, device, equipment and medium for determining physical downlink control channel |
| CN113300807B (en) * | 2020-02-24 | 2023-03-24 | 维沃移动通信有限公司 | Information detection method, information sending method, terminal and network equipment |
| CN111478753B (en) * | 2020-04-30 | 2022-05-27 | 无锡摩罗科技有限公司 | NR non-correlated combined PBCH DMRS blind detection method |
| EP4164186A4 (en) * | 2020-06-09 | 2024-03-20 | Beijing Xiaomi Mobile Software Co., Ltd. | Channel estimation method and apparatus, device, and storage medium |
| US20220014397A1 (en) * | 2020-07-09 | 2022-01-13 | Qualcomm Incorporated | Measurement of power level of demodulation reference signal prior to blind decoding of associated physical downlink control channel |
| CN114070532A (en) * | 2020-08-07 | 2022-02-18 | 展讯通信（上海）有限公司 | Method for confirming CCE index of control channel element and related product |
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| CN112751649B (en) * | 2020-12-17 | 2022-12-30 | 武汉虹旭信息技术有限责任公司 | Physical downlink control channel blind detection method and device |
| WO2022150979A1 (en) * | 2021-01-12 | 2022-07-21 | 捷开通讯(深圳)有限公司 | Transmission enhancement method and communication device |
| CN113067673B (en) * | 2021-03-17 | 2023-03-14 | 展讯通信（上海）有限公司 | PDCCH detection method, device and terminal equipment |
| CN115150022B (en) * | 2021-03-31 | 2024-04-16 | 维沃移动通信有限公司 | Control channel allocation method and device and communication equipment |
| CN114095128A (en) * | 2021-12-23 | 2022-02-25 | 广州慧睿思通科技股份有限公司 | PDCCH blind detection method, device, equipment and storage medium |
| CN114640424B (en) * | 2022-02-16 | 2024-04-23 | 成都中科微信息技术研究院有限公司 | PDCCH blind detection method, storage medium and computing device based on narrow-band DMRS configuration |
| CN116436587B (en) * | 2023-06-14 | 2023-09-05 | 芯迈微半导体(上海)有限公司 | Resource mapping method and device of control channel and resource demapping method and device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011011566A2 (en) * | 2009-07-24 | 2011-01-27 | Interdigital Patent Holdings, Inc. | Method and apparatus for obtaining demodulation reference signal port index information |
| WO2011160285A1 (en) * | 2010-06-21 | 2011-12-29 | Huawei Technologies Co., Ltd. | Control channel assignment and reception |
| EP2639994A2 (en) * | 2012-03-12 | 2013-09-18 | Samsung Electronics Co., Ltd | Method and apparatus for transmitting/receiving control channel in wireless communication system |
| CN103312483A (en) * | 2012-03-14 | 2013-09-18 | 华为终端有限公司 | Information sending and receiving control method, base station and UE (user equipment) |
| CN104798400A (en) * | 2013-01-09 | 2015-07-22 | Lg电子株式会社 | Method and user equipment for receiving signal and method and base station for transmitting signal |
| CN104904150A (en) * | 2013-01-07 | 2015-09-09 | Lg电子株式会社 | Method and apparatus for transmitting /receiving signals |
| CN105610556A (en) * | 2014-11-07 | 2016-05-25 | 中兴通讯股份有限公司 | Downlink information sending method, downlink information receiving method, downlink information sending device and downlink information receiving device |
| CN105680996A (en) * | 2016-03-03 | 2016-06-15 | 北京航空航天大学 | PDCCH blind detection method in LTE system |
| WO2016182046A1 (en) * | 2015-05-14 | 2016-11-17 | 株式会社Ｎｔｔドコモ | User terminal and wireless communication method |
| CN106209304A (en) * | 2016-06-23 | 2016-12-07 | 重庆邮电大学 | A kind of centralized EPDCCH blind detection method based on PRBs sequence |
| CN106549733A (en) * | 2016-12-06 | 2017-03-29 | 北京锐安科技有限公司 | A kind of blind detection method and device for strengthening Physical Downlink Control Channel |
| CN106656448A (en) * | 2012-01-13 | 2017-05-10 | 华为技术有限公司 | Method for generating and transmitting demodulation reference signal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932024A (en) * | 2009-06-24 | 2010-12-29 | 华为技术有限公司 | Downlink control information transmitting method and device |
| CN101699901B (en) * | 2009-09-28 | 2012-08-08 | 上海华为技术有限公司 | Method and device for optimizing search space of user equipment |
| CN101883369B (en) * | 2010-07-06 | 2012-12-19 | 新邮通信设备有限公司 | Blind detection method |
| CN102665230B (en) * | 2012-04-23 | 2014-07-09 | 电信科学技术研究院 | Method and device for carrying out E-PDCCH transmission and blind test |
| BR112017002089A2 (en) * | 2014-08-07 | 2017-12-19 | Huawei Tech Co Ltd | power control method, communications system, and related device |
-
2017
- 2017-10-10 CN CN201710933833.7A patent/CN109660315B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011011566A2 (en) * | 2009-07-24 | 2011-01-27 | Interdigital Patent Holdings, Inc. | Method and apparatus for obtaining demodulation reference signal port index information |
| WO2011160285A1 (en) * | 2010-06-21 | 2011-12-29 | Huawei Technologies Co., Ltd. | Control channel assignment and reception |
| CN106656448A (en) * | 2012-01-13 | 2017-05-10 | 华为技术有限公司 | Method for generating and transmitting demodulation reference signal |
| EP2639994A2 (en) * | 2012-03-12 | 2013-09-18 | Samsung Electronics Co., Ltd | Method and apparatus for transmitting/receiving control channel in wireless communication system |
| CN103312483A (en) * | 2012-03-14 | 2013-09-18 | 华为终端有限公司 | Information sending and receiving control method, base station and UE (user equipment) |
| CN104904150A (en) * | 2013-01-07 | 2015-09-09 | Lg电子株式会社 | Method and apparatus for transmitting /receiving signals |
| CN104798400A (en) * | 2013-01-09 | 2015-07-22 | Lg电子株式会社 | Method and user equipment for receiving signal and method and base station for transmitting signal |
| CN105610556A (en) * | 2014-11-07 | 2016-05-25 | 中兴通讯股份有限公司 | Downlink information sending method, downlink information receiving method, downlink information sending device and downlink information receiving device |
| WO2016182046A1 (en) * | 2015-05-14 | 2016-11-17 | 株式会社Ｎｔｔドコモ | User terminal and wireless communication method |
| CN105680996A (en) * | 2016-03-03 | 2016-06-15 | 北京航空航天大学 | PDCCH blind detection method in LTE system |
| CN106209304A (en) * | 2016-06-23 | 2016-12-07 | 重庆邮电大学 | A kind of centralized EPDCCH blind detection method based on PRBs sequence |
| CN106549733A (en) * | 2016-12-06 | 2017-03-29 | 北京锐安科技有限公司 | A kind of blind detection method and device for strengthening Physical Downlink Control Channel |
Non-Patent Citations (4)
| Title |
|---|
| DMRS sequences for ePDCCH,R1-120045;Huawei, HiSilicon;《3GPP TSGR1_68》;20120130;全文 * |
| Procedures for Grant-Free UL Transmissions，R1-1713639;Samsung;《3GPP TSG RAN WG1 Meeting #90》;20170825;全文 * |
| R1-1708890，Final Report of 3GPP TSG RAN WG1 #88bis v1.0.0;3GPP;《3GPP TSG RAN WG1 Meeting #89》;20170519;第5-8页 * |
| Skeleton of Multi-Carrier enhancements for UMTS Technical Report;Huawei, HiSilicon;《R1-1609558_Consideration on NR-PDCCH design，TSGR1_86b》;20160930;全文 * |
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