CN103457688A - Method and device for blind detection of downlink control information - Google Patents
Method and device for blind detection of downlink control information Download PDFInfo
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Abstract
The invention discloses a method and a device for blind detection of downlink control information. The method includes acquiring resource group position information occupied by a physical downlink control channel (PDCCH) from a physical layer (PHY) of a long term evolution (LTE) system; acquiring MAC (media access control) layer information of multiple user equipment (UE) needing blind detection from an MAC layer of the LTE system, and acquiring grouping information of downlink control information (DCI) detection areas of the multiple UE according to the MAC layer information; performing DCI blind detection according to the resource group position information occupied by the PDCCH and the grouping information of the DCI detection areas. By the method and the device, the number of blind detection and operation time can be greatly reduced, and operation efficiency and detection efficiency can be substantially improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of Downlink Control Information blind checking method and device.
Background technology
At Long Term Evolution (Long Term Evolution, referred to as LTE) in communication system, all subscriber equipmenies (User Equipment, referred to as UE) service dispatching information be by Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as PDCCH) issue, the service dispatching information of each UE is carried by a Downlink Control Information (Downlink Control Information, referred to as DCI).A plurality of UE of transmitting terminal are to the handling process of its Downlink Control Information (DCI) (Fig. 1 is the process chart according to the Downlink Control Information of the LTE system transmitting terminal UE of correlation technique) as shown in Figure 1.
Stipulated in the LTE agreement that Downlink Control Information is in the front n(1<=n of each subframe<=3) individual OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) mapping in symbol, order is first to shine upon control format indication information (Control Format Indication, referred to as CFI), then shine upon mixed automatic retransfer request (Hybrid Auto Retransmission Quest, referred to as HARQ) indication information (HI), finally shine upon Downlink Control Information (DCI), therefore the UE side is before carrying out the PDCCH detection, need to complete the detection of following control channel, comprise Physical Broadcast Channel (Physical Broadcast Channel, referred to as PBCH), Physical Control Format Indicator Channel (Physical Control Format Indicative Channel, referred to as PCFICH) and physical mixing retransmission indicating chanel (Physical Hybrid retransmission Indicative Channel, referred to as PHICH), the basic flow sheet that control channel detects is (Fig. 2 carries out the basic flow sheet of control channel detection according to the receiving terminal UE of correlation technique) as shown in Figure 2.
Can obtain system bandwidth, PHICH duration and PHICH resource size indication information by detecting the PBCH channel; Can obtain by detecting the PCFICH channel resource group position that OFDM symbolic number that in this subframe, control information takies and PCFICH take; Can obtain by detecting the PHICH channel resource group position that PHICH takies, UE finally can obtain the resource group positional information that PDCCH takies and be separated the physical resource mapping according to above information, and the basic procedure of PDCCH Channel Detection is (Fig. 3 carries out the basic flow sheet of PDCCH detection according to the receiving terminal UE of correlation technique) as shown in Figure 3.
PDCCH information after descrambling is the result that the DCI of all UE in community merges, and the mapping of DCI completes according to PDCCH form (Format).PDCCH Format is to be unit with control channel unit (Control Channel Element, referred to as CCE) set level, has 4 kinds, 1CCE, 2CCE, 4CCE, 8CCE, consists of respectively.Wherein, each CCE comprises 9 resource grains subgroups (Resource Element Group, referred to as REG), the minimum unit that REG is the down control channel resources mapping, comprise resource particle (the Resource Element of 4 energy for control channel, referred to as RE), wherein, PDCCH Format, CCE, REG and Payload(bit) relation is as shown in table 1.
Table 1, Supported PDCCH formats
For different search volumes, different CCE set levels and different UE, the original position of its CCE may be different, due to the DCI type of UE for the need detection, the CCE set level and the start position information that adopt are all unknown, therefore need to carry out the PDCCH blind Detecting, PDCCH information according to certain rule after to descrambling is searched for, every kind of possible information is carried out to rate de-matching, channel decoding, cyclic redundancy check (CRC) (Cyclic Redundancy Check, referred to as CRC) descrambling and solution CRC, until CRC can think that PDCCH detects successfully when correct, otherwise, think and DCI do not detected.
Need to carry out rate de-matching in the DCI testing process and conciliate CRC, it is known that rate de-matching needs the length of DCI, for different DCI types, length may be not identical, separate Radio Network Temporary Identifier (the Radio Network Temporary Identity that CRC need configure, referred to as RNTI) value is known, so at first UE needs to obtain DCI type to be detected according to effective RNTI type.When adopting different RNTI types, UE carries out the PDCCH detection, perhaps adopt identical RNTI type (to comprise Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell-Radio Network Temporary Identity, referred to as C-RNTI) and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Semi-Persistent Scheduling Cell-Radio Network Temporary Identity, referred to as SPS C-RNTI)) but transmission mode is carried out DCI when different while detecting, and it is also different needing the DCI form detected.Different RNTI types need the DCI type detected in Table 2 under different transmission mode.
Table 2, the corresponding DCI type list to be detected of different RNTI
If there are a plurality of UE in system, each UE needs to carry out similar DCI blind Detecting, to determine the spendable physical resource of this UE.In the LTE system, the resource that the PDCCH blind Detecting consumes is more, and the time taken is also long, if receiving terminal, when carrying out many UE blind check, also carries out according to the method that is similar to single UE, the resource consumed and cost are unacceptable.
Need to carry out repeatedly the DCI blind Detecting when in LTE system in correlation technique, having a plurality of UE and cause the problem that consumes resources is more, lose time to grow, not yet propose at present effective solution.
Summary of the invention
The invention provides a kind of Downlink Control Information blind checking method and device, at least to address the above problem.
According to an aspect of the present invention, provide a kind of Downlink Control Information blind checking method, having comprised: from the physical layer (PHY) of Long Term Evolution (LTE) system, obtained the resource group positional information that Physical Downlink Control Channel (PDCCH) takies; Obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, according to the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information; The resource group positional information taken according to PDCCH and the grouping information of DCI surveyed area are carried out the DCI blind Detecting.
Preferably, obtain from the physical layer (PHY) of Long Term Evolution (LTE) system the resource group positional information that Physical Downlink Control Channel (PDCCH) takies, comprising: by Physical Broadcast Channel (PBCH) is detected, obtain system bandwidth, physical mixing retransmission indicating chanel (PHICH) duration and PHICH resource size indication information; The resource group position taken by Physical Control Format Indicator Channel (PCFICH) being detected to OFDM (OFDM) symbolic number obtaining control information and take and PCFICH; By being detected, PHICH obtains the resource group position that PHICH takies; The resource group positional information that the resource group position acquisition PDCCH taken according to system bandwidth, PHICH duration, PHICH resource size indication information, OFDM symbolic number that control information takies, resource group position that PCFICH takies and PHICH takies.
Preferably, obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, grouping information according to Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information, comprise: from MAC, obtain MAC information, wherein, MAC information comprises: Radio Network Temporary Identifier (RNTI) value, RNTI type and transmission mode; According to the RNTI type, a plurality of UE are divided into groups for the first time, wherein, the RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (SPS C-RNTI); According to transmission mode, a plurality of UE in the C-RNTI grouping obtained after dividing into groups for the first time and a plurality of UE in SPS C-RNTI grouping are proceeded to divide into groups for the second time; Obtain the UE grouping sheet of a plurality of UE according to the result of twice grouping, wherein, the UE grouping sheet comprises: the RNTI value that the UE under every kind of transmission mode should be used; Obtain the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet according to the RNTI value.
Preferably, obtain the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet according to the RNTI value, comprising: the DCI search volume of calculating a plurality of UE in this UE grouping according to each UE grouping sheet; Repeat search space in the DCI search volume is merged to processing, obtain the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet.
Preferably, the resource group positional information taken according to PDCCH and the grouping information of DCI surveyed area are carried out the DCI blind Detecting, comprise: the resource group positional information that PDCCH is taken is separated the physical resource mapping, obtains the mapping relations that PDCCH is mapped to the DCI search volume; Carry out the DCI blind Detecting according to mapping relations in conjunction with DCI surveyed area information.
According to a further aspect in the invention, a kind of Downlink Control Information blind Detecting device is provided, comprise: the first acquisition module, obtain for the physical layer (PHY) from Long Term Evolution (LTE) system the resource group positional information that Physical Downlink Control Channel (PDCCH) takies; The second acquisition module, for obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, according to the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information; Detection module, carry out the DCI blind Detecting for the resource group positional information that takies according to PDCCH and the grouping information of DCI surveyed area.
Preferably, the first acquisition module comprises: the first acquiring unit, for by Physical Broadcast Channel (PBCH) is detected, obtaining system bandwidth, physical mixing retransmission indicating chanel (PHICH) duration and PHICH resource size indication information; Second acquisition unit, for the resource group position taken by Physical Control Format Indicator Channel (PCFICH) being detected to OFDM (OFDM) symbolic number obtaining control information and take and PCFICH; The 3rd acquiring unit, for obtaining by PHICH is detected the resource group position that PHICH takies; The 4th acquiring unit, the resource group positional information taken for the resource group position acquisition PDCCH taken according to system bandwidth, PHICH duration, PHICH resource size indication information, OFDM symbolic number that control information takies, resource group position that PCFICH takies and PHICH.
Preferably, the second acquisition module comprises: the 5th acquiring unit, and for obtain MAC information from MAC, wherein, MAC information comprises: Radio Network Temporary Identifier (RNTI) value, RNTI type and transmission mode; The first grouped element, for according to the RNTI type, a plurality of UE being divided into groups for the first time, wherein, the RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (SPS C-RNTI); The second grouped element, proceed to divide into groups for the second time for a plurality of UE of the C-RNTI grouping that obtains after to grouping for the first time according to transmission mode and a plurality of UE in SPS C-RNTI grouping; The 6th acquiring unit, obtain the UE grouping sheet of a plurality of UE for the result according to twice grouping, wherein, the UE grouping sheet comprises: the RNTI value that the UE under every kind of transmission mode should be used; The 7th acquiring unit, for the grouping information of the DCI surveyed area of a plurality of UE of obtaining each UE grouping sheet according to the RNTI value.
Preferably, the 6th acquiring unit comprises: computing unit, for according to every kind of RNTI corresponding to transmission mode, calculating the DCI search volume; Processing unit, merge processing for the repeat search space to the DCI search volume, obtains the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet.
Preferably, detection module comprises: obtain unit, for the resource group positional information that PDCCH is taken, separated the physical resource mapping, obtain the mapping relations that PDCCH is mapped to the DCI search volume; Detecting unit, for carrying out the DCI blind Detecting according to mapping relations in conjunction with DCI surveyed area information table.
By the present invention, employing is carried out blind check to a plurality of UE after obtaining the grouping information of DCI surveyed area of a plurality of UE again, only detect the position that DCI may occur, may shine upon the situation of a plurality of UE for certain position, only need a decoding is carried out in this band of position, the mode of the operation such as rate-matched, solved in existing LTE system and need to carry out repeatedly the DCI blind Detecting while having a plurality of UE and cause consumes resources more, the problem of losing time to grow, and then reached and can reduce in a large number the blind Detecting number of times, operation time, significantly improve operation efficiency, the effect of detection efficiency.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the process chart according to the Downlink Control Information of the LTE system transmitting terminal UE of correlation technique;
Fig. 2 carries out the basic flow sheet of control channel detection according to the receiving terminal UE of correlation technique;
Fig. 3 carries out the basic flow sheet of PDCCH detection according to the receiving terminal UE of correlation technique;
Fig. 4 is the Downlink Control Information blind checking method flow chart according to the embodiment of the present invention;
Fig. 5 is Downlink Control Information blind Detecting schematic flow sheet according to the preferred embodiment of the invention;
Fig. 6 is the detail flowchart of Downlink Control Information blind Detecting according to the preferred embodiment of the invention;
Fig. 7 is the structural representation in the dedicated search space of 6 UE in the LTE system according to the preferred embodiment of the invention;
Fig. 8 is the structural representation in 6 UE dedicated search space after merging according to the preferred embodiment of the invention;
Fig. 9 is the structured flowchart according to the Downlink Control Information blind Detecting device of the embodiment of the present invention;
Figure 10 is the structured flowchart of Downlink Control Information blind Detecting device according to the preferred embodiment of the invention;
Figure 11 is the structured flowchart according to the Downlink Control Information blind Detecting device of another preferred embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the application can combine mutually.
Fig. 4 is the Downlink Control Information blind checking method flow chart according to the embodiment of the present invention, and as shown in Figure 4, the method mainly comprises the following steps (step S402-step S406):
Step S402, obtain from the physical layer (PHY) of Long Term Evolution (LTE) system the resource group positional information that Physical Downlink Control Channel (PDCCH) takies.
Step S404, obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, according to the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information.
Step S406, the resource group positional information taken according to PDCCH and the grouping information of DCI surveyed area are carried out the DCI blind Detecting.
In the step S402 of the present embodiment, while from the physical layer (PHY) of Long Term Evolution (LTE) system, obtaining the resource group positional information that Physical Downlink Control Channel (PDCCH) takies, can realize like this: first by Physical Broadcast Channel (PBCH) is detected, obtain system bandwidth, physical mixing retransmission indicating chanel (PHICH) duration and PHICH resource size indication information; The resource group position taken by Physical Control Format Indicator Channel (PCFICH) being detected to OFDM (OFDM) symbolic number obtaining control information and take and PCFICH again; By being detected, PHICH obtains the resource group position that PHICH takies again; The resource group positional information that the resource group position acquisition PDCCH finally taken according to system bandwidth, PHICH duration, PHICH resource size indication information, OFDM symbolic number that control information takies, resource group position that PCFICH takies and PHICH takies.By this implementation, can obtain the resource group positional information that PDCCH takies.
In the step S404 of the present embodiment, obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, during according to the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information, can adopt mode in this to carry out: at first, obtain MAC information from MAC, wherein, MAC information comprises: Radio Network Temporary Identifier (RNTI) value, RNTI type and transmission mode, according to the RNTI type, a plurality of UE are divided into groups for the first time, wherein, the RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (SPS C-RNTI), according to transmission mode, a plurality of UE in the C-RNTI grouping obtained after dividing into groups for the first time and a plurality of UE in SPS C-RNTI grouping are proceeded to divide into groups for the second time again, obtain again the UE grouping sheet of a plurality of UE according to the result of twice grouping, wherein, the UE grouping sheet comprises: the RNTI value that the UE under every kind of transmission mode should be used, finally according to the RNTI value, obtain the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet.
Wherein, while obtaining the grouping information of DCI surveyed area of a plurality of UE in each UE grouping sheet according to the RNTI value, can first according to each UE grouping sheet, calculate the DCI search volume of a plurality of UE in this UE grouping, again the repeat search space in the DCI search volume is merged to processing, finally obtain the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet.
In this way, can obtain the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE.
In the step S406 of the present embodiment, when the resource group positional information taken according to PDCCH and the grouping information of DCI surveyed area are carried out the DCI blind Detecting, can adopt mode in this to carry out: the resource group positional information first PDCCH taken is separated the physical resource mapping, after acquisition PDCCH is mapped to the mapping relations of DCI search volume, just can carry out the DCI blind Detecting in conjunction with DCI surveyed area information according to mapping relations.In this way, just can complete the process of whole DCI blind Detecting.
Fig. 5 is Downlink Control Information blind Detecting schematic flow sheet according to the preferred embodiment of the invention, and as shown in Figure 5, this flow process mainly comprises the following steps (step S502-step S508):
Step S502, collection need to be carried out the UE relevant information of blind Detecting, mainly comprises the RNTI value of UE, the RNTI type of UE and the information such as transmission mode of UE;
Step S504, divided into groups to the UE relevant information of collecting, at first according to the RNTI type, a plurality of UE are divided into groups, secondly, then according to transmission mode being divided into groups to a plurality of UE under a plurality of UE under the CRNTI type group, SPS CRNTI type group;
Step S506, RNTI value corresponding to every kind of transmission mode in the UE grouping sheet obtained according to CRNTI type and SPS CRNTI type packet carried out to the computing of DCI region of search (being the DCI surveyed area), and the DCI region of search repeated between UE is merged to processing, generate the grouping information table of the DCI region of search of every kind of DCI type;
Step S508, grouping information table to DCI 1A region of search arranges the merging processing, obtain the final region of search grouping information table of DCI 1A, the DCI region of search information table of same other DCI types arranges to merge and processes, obtain the final region of search grouping information table of other DCI types, the resource group positional information taken in conjunction with the PDCCH got in advance according to the final region of search grouping information table of all DCI types is carried out the DCI blind Detecting.
Certainly, the capable control information blind Detecting flow process shown in Fig. 5 is only a kind of preferred implementation, in actual applications, is not limited to this, for example, also can realize as follows:
(1) obtain LTE system control channel information relevant parameter, comprise the information that PBCH, PCFICH, PHICH comprise, these information are the prerequisites of carrying out the PDCCH blind Detecting.
(2) the UE information of all needs being carried out to the PDCCH blind Detecting is collected, in the LTE system, a plurality of UE may be in different states, therefore, from the process of UE access LTE system, each UE need to obtain respectively the multiple RNTI such as RARNTI, TempCRNTI, CRNTI, SPS CRNTI.After UE completes access, also may use different transmission modes to carry out transfer of data, every kind of transmission mode is also incomplete same to the DCI type in requisition for detecting, therefore, at transmission mode 1(, be the single-antenna transmission transmission mode), transmission mode 2(is the transmit diversity transmission mode) and transmission mode 7(be the beamforming transmission pattern) under isotype, need UE to carry out DCI1A, the detection of DCI1, for transmission mode 3(, be the Open-Loop Spatial Multiplexing transmission mode), need UE to carry out DCI1A, the detection of DCI2A, and be the Closed-Loop Spatial Multiplexing transmission mode for transmission mode 4(), need UE to carry out DCI1A, the detection of DCI2.Therefore, in many UE system, should first collect the relevant information of all UE.It should be noted that in the LTE system, multiple RNTI type can exist simultaneously, and multiple transmission mode also can exist simultaneously.
(3) for the UE information of collecting, at first should be divided into groups according to the RNTI type, be incomplete same because different RNTI types needs search volume.In the LTE system, RARNTI fixes corresponding search volume; The transmission mode that TempCRNTI is used is the transmission mode of system default; CRNTI needs to be divided into groups according to transmission mode.Grouping is carried out in such a way: all UE need to detect DCI1A, and all CRNTI are formed to a table, obtain the group list of DCI1A; Transmission mode 1,2,7 also needs to detect DCI1, and the UE that is 1,2,7 by all transmission modes forms a table, obtains the group list of DCI1; Transmission mode 3 also needs to detect DCI2A, and the UE that is 3 by all transmission modes forms a table, obtains the group list of DCI2A; Transmission mode 4 also needs to detect DCI2, and the UE that is 4 by all transmission modes forms a table, obtains the group list of DCI2.After completing above-mentioned grouping, can obtain 6 lists, be respectively: the RARNTI list, the TempCRNTI list, the CRNTI list is divided into again DCI1A list, DCI1 list, DCI2A list, and the DCI2 list.
(4) calculate the Candidate Set of UE under each CCE degree of polymerization under each type (TempCRNTI, CRNTI and SPS CRNTI) grouping, the UE group list obtained according to previous step is calculated the repeat search space existed between UE in every list, and merge processing, form the final region of search grouping information of the DCI table that final many UE can use, then carry out the DCI blind Detecting according to the resource group positional information that the final region of search grouping information table of all DCI types takies in conjunction with the PDCCH got in advance.
Below in conjunction with the preferred embodiment shown in Fig. 6 to Fig. 8, above line control information blind check flow measurement method is described in detail.Need to explain, in this preferred embodiment, scene is as follows: make 8 UE carry out respectively blind check in system, wherein 5 UE have completed access, and 2 UE have just initiated access, and 1 UE is in access procedure.
Please refer to Fig. 6, Fig. 6 is the detail flowchart of Downlink Control Information blind Detecting according to the preferred embodiment of the invention, and as shown in Figure 6, this flow process mainly comprises the following steps (step S602-step S614):
The relevant information comprised in step S602, collection PBCH, PCFICH at first, can be obtained system bandwidth, PHICH duration, PHICH resource size indication information from PBCH; Can obtain by detecting the PCFICH channel resource group position that OFDM symbolic number that in this subframe, control information takies and PCFICH take; Can obtain by detecting the PHICH channel resource group position that PHICH takies, finally according to above information UE, can obtain the resource group positional information that PDCCH takies and be separated the physical resource mapping; Making the system works pattern is FDD, and bandwidth equals 20MHz, and the eNodeB number of transmit antennas is that 2, CFI equals 2, PHICHGroupNum and equals 13, and the subframe numbers that needs blind check is subframe 0, can be by calculating, and available CCE number is 50;
The UE relevant parameter that step S604, collection need to be carried out blind check, order:
The UE1:RNTI type is CRNTI, and the RNTI value is 50, and transmission mode is TM2;
The UE2:RNTI type is CRNTI, and the RNTI value is 51, and transmission mode is TM3;
The UE3:RNTI type is CRNTI, and the RNTI value is 52, and transmission mode is TM2;
The UE4:RNTI type is CRNTI, and the RNTI value is 53, and transmission mode is TM2;
The UE5:RNTI type is CRNTI, and the RNTI value is 54, and transmission mode is TM3;
The UE6:RNTI type is TempCRNTI, and the RNTI value is 60, and transmission mode is TM2;
The UE7:RNTI type is RARNTI, and the RNTI value is 6, and transmission mode is TM2;
The UE8:RNTI type is RARNTI, and the RNTI value is 7, and transmission mode is TM2.
According to the UE information of obtaining, UE is divided into groups, is at first divided into groups according to the RNTI type:
UE queue 1:CRNTI queue, comprise UE1, UE2, UE3, UE4, UE5;
UE queue 2:TempCRNTI queue, comprise UE6;
UE queue 3:RARNTI queue, comprise UE7, UE8;
Step S606, continue the queue to CRNTI UE and divided into groups, divided into groups according to transmission mode, the DCI type that the TM2 pattern need to detect is the DCI1A type, the DCI1 type; The DCI type that the TM3 pattern need to detect is the DCI1A type, and the DCI2A type can complete grouping according to above information, and group result (grouping sheet) is as follows:
CRNTI UE queue 1:DCI1A, UE1, UE2, UE3, UE4, UE5;
CRNTIUE queue 2:DCI1, UE1, UE3, UE4;
CRNTI UE queue 3:DCI2A, UE2, UE5.
Step S608, according to above-mentioned grouping sheet, calculate the blind check search volume of a plurality of UE in each group, and carry out the union processing, at first UE calculates the corresponding search volume of different CCE set level (being above-mentioned region of search), is defined as follows:
Wherein, 0, L-1, L ∈ 1,2,4,8} means CCE set level, m=0 ..., M
(L)-1, M
(L)mean the searching times under given CCE degree of polymerization level, N
cCE, kmean the CCE number that in subframe k, PDCCH can use;
Public search space: Y
k=0, the horizontal L=4 of the corresponding CCE degree of polymerization, 8;
The proprietary search volume of UE: Y
k=(AY
k-1) modD, wherein, Y
-1=n
rNTI≠ 0, A=39827, D=65537,
n
smean timeslot number in a radio frames;
For different CCE degree of polymerization levels, as shown in table 3 at the searching times in public search space and UE dedicated search space:
The search Candidate Set table that the different CCE of table 3 are corresponding
As can be seen from Table 3, the search volume of public search space and UE may be overlapping, for existing, for example both can be mapped to, for the DCI form (DCI 0 and DCI 1A) that public search space also can be mapped to the UE search volume, UE need to travel through all CCE set levels, and searched in corresponding search volume, through steps such as rate de-matching, channel decoding, CRC descrambling and solution CRC processes, carry out maximum M
(L)inferior blind Detecting gets final product.Consider that the base station end adopts the probability of 2CCE and 4CCE to be greater than the probability that adopts 8CCE and 1CCE, UE, when traversal CCE set level, can carry out according to the order of 2CCE, 4CCE, 8CCE, 1CCE;
The search volume of each UE in step S610, acquisition system, now, please refer to Fig. 7, Fig. 7 is the structural representation in the dedicated search space of 6 UE in the LTE system according to the preferred embodiment of the invention, Fig. 7 and L1 hereinafter, L2, L4, L8 means respectively different CCE set levels, and the search volume of the UE of corresponding listed data bit under corresponding degree of polymerization condition is as follows:
UE1：
L1：40、41、42、43、44、45
L2：30、32、34、36、38、40
L4：16、20
L8：32、40
UE2：
L1：17、18、19、20、21、22
L2：34、36、38、40、42、44
L4：12、16
L8：24、32
UE3：
L1：7、8、9、10、11、12
L2：14、16、18、20、22、24
L4：36、40
L8：24、32
UE4：
L1：47、48、49、0、1、2
L2：44、46、48、0、2、4
L4：12、16
L8：24、32
UE5：
L1：24、25、26、27、28、29
L2：48、0、2、4、6、8
L4：8、12
L8：16、24
UE6：
L1：38、39、40、41、42、43
L2：26、28、30、32、34、36
L4：0、4
L8：0、8
Step S612, above result of calculation is processed, the union processing is carried out in the search volume of repeating between UE, now, please refer to Fig. 8, Fig. 8 is the structural representation in the dedicated search space of 6 UE after merging according to the preferred embodiment of the invention, as shown in Figure 8:
L1：
0：UE4
1：UE4
2：UE4
7：UE3
8：UE3
9：UE3
10：UE3
11：UE3
12：UE3
17：UE2
18：UE2
19：UE2
20：UE2
21：UE2
22：UE2
24：UE5
25：UE5
26：UE5
27：UE5
28：UE5
29：UE5
38：UE6
39：UE6
40：UE1、UE6
41：UE1、UE6
42：UE1、UE6
43：UE1、UE6
44：UE1
45：UE1
47：UE4
48：UE4
49：UE4
L2：
0：UE4、UE5
2：UE4、UE5
4：UE4、UE5
6：UE5
8：UE5
14：UE3
16：UE3
18：UE3
20：UE3
22：UE3
24：UE3
26：UE6
28：UE6
30：UE1、UE6
32：UE1、UE6
34：UE1、UE2、UE6
36：UE1、UE2、UE6
38：UE1、UE2
40：UE1、UE2
42：UE2
44：UE2、UE4
46：UE4
48：UE4、UE5
L4：
0：UE6
4：UE6
8：UE5
12：UE2、UE4、UE5
16：UE1、UE2、UE4
20：UE1
36：UE3
40：UE3
L8：
0：UE6
8：UE6
16：UE5
24：UE2、UE3、UE4、UE5
32：UE1、UE2、UE3、UE4
40：UE1
Step S614, by arranging, finally obtain above DCI surveyed area grouping sheet, then carry out the DCI blind Detecting according to the resource group positional information that the final region of search grouping information table of all DCI types takies in conjunction with the PDCCH got in advance.
In the said method flow process, when a plurality of UE are carried out to blind check, only detect the position that DCI may occur, and there is the situation of a plurality of UE mapping possibilities for same position, only need a decoding is carried out in this zone, the operations such as rate-matched, carry out different CRC descrambling verifications to different UEs and get final product, reduce repetitive operation, improved detection efficiency.
The Downlink Control Information blind checking method that adopts above-described embodiment to provide, when a plurality of UE are carried out to blind check, only detect the position that DCI may occur, only need a decoding is carried out in this band of position, the operations such as rate-matched, solved in existing LTE system and need to carry out repeatedly the DCI blind Detecting while having a plurality of UE and cause the problem that consumes resources is more, lose time to grow, and then reached and can reduce in a large number blind Detecting number of times, operation time, significantly improve the effect of operation efficiency, detection efficiency.
Fig. 9 is the structured flowchart according to the Downlink Control Information blind Detecting device of the embodiment of the present invention, the Downlink Control Information blind checking method that this device provides in order to realize above-described embodiment, as shown in Figure 9, this device mainly comprises: comprising: the first acquisition module 10, obtain for the physical layer (PHY) from Long Term Evolution (LTE) system the resource group positional information that Physical Downlink Control Channel (PDCCH) takies; The second acquisition module 20, be connected to the first acquisition module 10, for obtain the MAC layer information of the subscriber equipment (UE) that a plurality of needs carry out blind Detecting from the media access control (MAC) of LTE system layer, according to the grouping information of Downlink Control Information (DCI) surveyed area of a plurality of UE of MAC layer acquisition of information; Detection module 30, be connected to the second acquisition module 20, for the resource group positional information that takies according to PDCCH and the grouping information of DCI surveyed area, carries out the DCI blind Detecting.
Figure 10 is the structured flowchart of Downlink Control Information blind Detecting device according to the preferred embodiment of the invention, as shown in figure 10, in the device provided in the preferred embodiment: the first acquisition module 10 can comprise: the first acquiring unit 12, for by Physical Broadcast Channel (PBCH) is detected, obtaining system bandwidth, physical mixing retransmission indicating chanel (PHICH) duration and PHICH resource size indication information; Second acquisition unit 14, be connected to the first acquiring unit 12, for the resource group position taken by Physical Control Format Indicator Channel (PCFICH) being detected to OFDM (OFDM) symbolic number obtaining control information and take and PCFICH; The 3rd acquiring unit 16, be connected to second acquisition unit 14, for by PHICH is detected, obtaining the resource group position that PHICH takies; The 4th acquiring unit 18, be connected to the 3rd acquiring unit 16, the resource group positional information taken for the resource group position acquisition PDCCH taken according to system bandwidth, PHICH duration, PHICH resource size indication information, OFDM symbolic number that control information takies, resource group position that PCFICH takies and PHICH.
In the device provided at preferred embodiment, the second acquisition module 20 can comprise: the 5th acquiring unit 22, and for obtain MAC information from MAC, wherein, MAC information comprises: Radio Network Temporary Identifier (RNTI) value, RNTI type and transmission mode; The first grouped element 24, be connected to the 5th acquiring unit 22, for according to the RNTI type, a plurality of UE being divided into groups for the first time, wherein, the RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (SPS C-RNTI); The second grouped element 26, be connected to the first grouped element 24, for a plurality of UE of the C-RNTI grouping that obtains after to grouping for the first time according to transmission mode and a plurality of UE in S-PS C-RNTI grouping, proceeds to divide into groups for the second time; The 6th acquiring unit 27, be connected to the second grouped element 26, obtains the UE grouping sheet of a plurality of UE for the result according to twice grouping, and wherein, the UE grouping sheet comprises: the RNTI value that the UE under every kind of transmission mode should be used; The 7th acquiring unit 28, be connected to the 6th acquiring unit 27, for the grouping information of the DCI surveyed area of a plurality of UE of obtaining each UE grouping sheet according to the RNTI value.
Wherein, in actual applications, the 6th acquiring unit 27 can comprise: computing unit 272, for according to every kind of RNTI corresponding to transmission mode, calculating the DCI search volume; Processing unit 274, be connected to computing unit 272, for the repeat search space to the DCI search volume, merges processing, obtains the grouping information of the DCI surveyed area of a plurality of UE in each UE grouping sheet.
In the device provided at preferred embodiment, detection module 30 can comprise: obtain unit 32, for the resource group positional information that PDCCH is taken, separated the physical resource mapping, obtain the mapping relations that PDCCH is mapped to the DCI search volume; Detecting unit 34, be connected to and obtain unit 32, for according to mapping relations, in conjunction with DCI surveyed area information table, carrying out the DCI blind Detecting.
Figure 11 is the structured flowchart according to the Downlink Control Information blind Detecting device of another preferred embodiment of the present invention, and as shown in figure 11, this device mainly comprises with lower unit:
Main control unit, be mainly used in collecting the relevant information after PBCH, PCFICH, PHICH are parsed, and configures the relevant parameter that many UE blind check information table generates, and the startup of the module such as responsible RNTI grouping.
The RNTI information collection unit, be mainly used in collecting the user equipment information that need to carry out the PDCCH blind Detecting, comprise the RNTI value of distributing to each subscriber equipment (UE), the RNTI type, transmission mode etc., and will send to the RNTI grouped element after the relevant information arranging order.
The RNTI grouped element, be mainly used in receiving subscriber equipment (UE) relevant information that the RNTI information collection unit sends over, and according to RNTI type, the information such as transmission mode, the RNTI value is divided into groups, and the result after grouping is sent to UE search volume union computing unit.
UE search volume union computing unit, be mainly used in receiving the grouped data that the RNTI grouped element sends over, and take group as unit, calculate respectively the UE search volume, overlapping search volume in group, UE exists, merge processing, calculates under every kind of CCE degree of polymerization, the set of the UE that each UE space position candidate need to detect, and operation result is sent to many UE blind check parameter generating unit.
Many UE blind check parameter generating unit, be mainly used in receiving the union result of calculation that UE search volume union computing unit sends over, and, according to RNTI type, DCI type, the final arrangement generates many UE blind check information table that the blind Detecting unit can be used.
The Downlink Control Information blind Detecting device that adopts above-described embodiment to provide, when a plurality of UE are carried out to blind check, only detect the position that DCI may occur, only need a decoding is carried out in this band of position, the operations such as rate-matched, solved in existing LTE system and need to carry out repeatedly the DCI blind Detecting while having a plurality of UE and cause the problem that consumes resources is more, lose time to grow, and then reached and can reduce in a large number blind Detecting number of times, operation time, significantly improve the effect of operation efficiency, detection efficiency.
From above description, can find out, the present invention has realized following technique effect: when a plurality of UE are carried out to blind check, only detect the position that DCI may occur, and there is the situation of a plurality of UE mapping possibilities for same position, only need a decoding is carried out in this zone, the operations such as rate-matched, and different UEs is carried out to different CRC descrambling verifications to be got final product, reduced repetitive operation, simplify the hardware complexity of blind Detecting, thereby be able to reduce in a large number blind Detecting number of times, operation time, significantly improve the effect of operation efficiency, detection efficiency.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order be different from herein, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a Downlink Control Information blind checking method, is characterized in that, comprising:
Obtain from the physical layer PHY of Long Term Evolution LTE system the resource group positional information that physical downlink control channel PDCCH takies;
Obtain from the media access control MAC layer of described LTE system the MAC layer information that a plurality of needs carry out the user equipment (UE) of blind Detecting, according to the grouping information of the Downlink Control Information DCI surveyed area of the described a plurality of UE of described MAC layer acquisition of information;
The resource group positional information taken according to described PDCCH and the grouping information of described DCI surveyed area are carried out the DCI blind Detecting.
2. method according to claim 1, is characterized in that, from the physical layer PHY of Long Term Evolution LTE system, obtains the resource group positional information that physical downlink control channel PDCCH takies, and comprising:
By being detected, Physical Broadcast Channel PBCH obtains system bandwidth, physical mixing retransmission indicating chanel PHICH duration and PHICH resource size indication information;
By being detected, Physical Control Format Indicator Channel PCFICH obtains the resource group position that orthogonal frequency division multiplex OFDM symbolic number that control information takies and PCFICH take;
By being detected, PHICH obtains the resource group position that PHICH takies;
The resource group positional information that the described PDCCH of resource group position acquisition taken according to described system bandwidth, described PHICH duration, described PHICH resource size indication information, OFDM symbolic number that described control information takies, resource group position that described PCFICH takies and described PHICH takies.
3. method according to claim 1, it is characterized in that, obtain from the media access control MAC layer of described LTE system the MAC layer information that a plurality of needs carry out the user equipment (UE) of blind Detecting, grouping information according to the Downlink Control Information DCI surveyed area of the described a plurality of UE of described MAC layer acquisition of information comprises:
Obtain described MAC information from described MAC, wherein, described MAC information comprises: Radio Network Temporary Identifier RNTI value, RNTI type and transmission mode;
According to described RNTI type, described a plurality of UE are divided into groups for the first time, wherein, described RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI SPS C-RNTI;
According to described transmission mode, a plurality of UE in the described C-RNTI grouping obtained after dividing into groups for the first time and a plurality of UE in described SPSC-RNTI grouping are proceeded to divide into groups for the second time;
Obtain the UE grouping sheet of described a plurality of UE according to the result of twice grouping, wherein, described UE grouping sheet comprises: the described RNTI value that the UE under every kind of transmission mode should be used;
Obtain the grouping information of the described DCI surveyed area of a plurality of UE in each UE grouping sheet according to described RNTI value.
4. method according to claim 3, is characterized in that, obtains the grouping information of the described DCI surveyed area of a plurality of UE in each UE grouping sheet according to described RNTI value, comprising:
Calculate the DCI search volume of a plurality of UE in this UE grouping according to each UE grouping sheet;
Repeat search space in described DCI search volume is merged to processing, obtain the grouping information of the described DCI surveyed area of a plurality of UE in each UE grouping sheet.
5. method according to claim 4, is characterized in that, the resource group positional information taken according to described PDCCH and the grouping information of described DCI surveyed area are carried out the DCI blind Detecting, comprising:
The resource group positional information that described PDCCH is taken is separated the physical resource mapping, obtains the mapping relations that described PDCCH is mapped to described DCI search volume;
Carry out described DCI blind Detecting according to described mapping relations in conjunction with described DCI surveyed area information.
6. a Downlink Control Information blind Detecting device, is characterized in that, comprising:
The first acquisition module, obtain for the physical layer PHY from Long Term Evolution LTE system the resource group positional information that physical downlink control channel PDCCH takies;
The second acquisition module, for from the media access control MAC layer of described LTE system, obtaining the MAC layer information that a plurality of needs carry out the user equipment (UE) of blind Detecting, according to the grouping information of the Downlink Control Information DCI surveyed area of the described a plurality of UE of described MAC layer acquisition of information;
Detection module, carry out the DCI blind Detecting for the resource group positional information that takies according to described PDCCH and the grouping information of described DCI surveyed area.
7. device according to claim 6, is characterized in that, described the first acquisition module comprises:
The first acquiring unit, for obtaining system bandwidth, physical mixing retransmission indicating chanel PHICH duration and PHICH resource size indication information by Physical Broadcast Channel PBCH is detected;
Second acquisition unit, for obtaining by Physical Control Format Indicator Channel PCFICH is detected the resource group position that orthogonal frequency division multiplex OFDM symbolic number that control information takies and PCFICH take;
The 3rd acquiring unit, for obtaining by PHICH is detected the resource group position that PHICH takies;
The 4th acquiring unit, the resource group positional information taken for the described PDCCH of resource group position acquisition taken according to described system bandwidth, described PHICH duration, described PHICH resource size indication information, OFDM symbolic number that described control information takies, resource group position that described PCFICH takies and described PHICH.
8. device according to claim 6, is characterized in that, described the second acquisition module comprises:
The 5th acquiring unit, for obtain described MAC information from described MAC, wherein, described MAC information comprises: Radio Network Temporary Identifier RNTI value, RNTI type and transmission mode;
The first grouped element, for according to described RNTI type, described a plurality of UE being divided into groups for the first time, wherein, described RNTI type comprises: Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI SPSC-RNTI;
The second grouped element, proceed to divide into groups for the second time for a plurality of UE of the described C-RNTI grouping that obtains after to grouping for the first time according to described transmission mode and a plurality of UE in described SPS C-RNTI grouping;
The 6th acquiring unit, obtain the UE grouping sheet of described a plurality of UE for the result according to twice grouping, wherein, described UE grouping sheet comprises: the described RNTI value that the UE under every kind of transmission mode should be used;
The 7th acquiring unit, for the grouping information of the described DCI surveyed area of a plurality of UE of obtaining each UE grouping sheet according to described RNTI value.
9. device according to claim 8, is characterized in that, described the 6th acquiring unit comprises:
Computing unit, for calculating the DCI search volume according to every kind of described RNTI corresponding to transmission mode;
Processing unit, merge processing for the repeat search space to described DCI search volume, obtains the grouping information of the described DCI surveyed area of a plurality of UE in each UE grouping sheet.
10. device according to claim 9, is characterized in that, described detection module comprises:
Obtain unit, for the resource group positional information that described PDCCH is taken, separated the physical resource mapping, obtain the mapping relations that described PDCCH is mapped to described DCI search volume;
Detecting unit, for carrying out described DCI blind Detecting according to described mapping relations in conjunction with described DCI surveyed area information table.
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| CN111436101B (en) * | 2019-01-11 | 2024-06-04 | 华为技术有限公司 | Communication method and device |
| CN116865912A (en) * | 2023-09-04 | 2023-10-10 | 芯迈微半导体(上海)有限公司 | Method and system for blind detection control and early stopping of physical layer downlink control channel |
| CN116865912B (en) * | 2023-09-04 | 2023-11-03 | 芯迈微半导体(上海)有限公司 | Method and system for blind detection control and early stopping of physical layer downlink control channel |
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