CN102186251A - Method and system for transmitting downlink control information - Google Patents

Method and system for transmitting downlink control information Download PDF

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CN102186251A
CN102186251A CN201110111386XA CN201110111386A CN102186251A CN 102186251 A CN102186251 A CN 102186251A CN 201110111386X A CN201110111386X A CN 201110111386XA CN 201110111386 A CN201110111386 A CN 201110111386A CN 102186251 A CN102186251 A CN 102186251A
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pdcch
information
control information
downlink control
main
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CN102186251B (en
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吴欣
戴博
左志松
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2012/072556 priority patent/WO2012146095A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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Abstract

The invention provides a method and a system for transmitting downlink control information and is applied to long term evolution advance (LTE-A) system. The method comprises the following steps that: a base station sends the downlink control information to user equipment (UE) on a subframe through a physical downlink control channel (PDCCH), wherein the PDCCH comprises a master PDCCH and a slave PDCCH; the base station sends information of the master PDCCH at the position of a first time frequency; and the base station sends information of the slave PDCCH at the position of a second time frequency, wherein the information of the master PDCCH comprises indication information used for indicating the slave PDCCH, and the information of the slave PDCCH comprises scheduling information used for scheduling physical uplink shared channels and/or physical downlink shared channels. By the technical scheme provided by the invention, the system performance during access of multiple users can be ensured, and the problem of interference among different base stations is solved to a certain extent.

Description

The transmission method of Downlink Control Information and system
Technical field
The present invention relates to the communications field, in particular to a kind of transmission method and system of Downlink Control Information.
Background technology
Long Term Evolution (Long Term Evolution, abbreviating LTE as) radio frames (radio frame) in the system comprises Frequency Division Duplexing (FDD) (Frequency Division Duplex, abbreviate FDD as) frame structure of pattern and time division duplex (Time Division Duplex abbreviates TDD as) pattern.The frame structure of fdd mode, as shown in Figure 1, the radio frames of 10 milliseconds (ms) is 0.5ms by 20 length, and the time slot (slot) of numbering 0～19 is formed, and it is subframe (sub frame) i of 1ms that time slot 2i and 2i+1 form length.The frame structure of tdd mode, as shown in Figure 2, the radio frames of a 10ms is longly formed for the field of 5ms (half frame) by two, and a field comprises that 5 length are the subframe of 1ms, and subframe i is defined as 2 and longly is time slot 2i and the 2i+1 of 0.5ms.In above-mentioned two kinds of frame structures, for standard cyclic prefix (Normal Cyclic Prefix abbreviates Normal CP as), the symbol that it is 66.7 microseconds (us) that time slot comprises 7 length, wherein the CP length of first symbol is 5.21us, and the length of all the other 6 symbols is 4.69us; For extended cyclic prefix (Extended Cyclic Prefix abbreviates Extended CP as), a time slot comprises 6 symbols, and the CP length of all symbols is 16.67us.
The version number of LTE is corresponding to R8 (Release 8), and its version number that increases the version correspondence is R9 (Release 9), and for from now on LTE-Advance, its version number is R10 (Release 10) just.Following three kinds of downlink physical control channels have been defined among the LTE: physical down control format indicating channel (Physical Control Format Indicator Channel abbreviates PCFICH as); The automatic repeat requests indicating channel of physical mixed (Physical Hybrid Automatic Retransmission Request Indicator Channel abbreviates PHICH as); Physical Downlink Control Channel (Physical Downlink Control Channel abbreviates PDCCH as).
Wherein, the PCFICH loaded information is used in reference to OFDM (the Orthogonal Frequency Division Multiplexing that is shown in transmission PDCCH in the subframe, abbreviate OFDM as) number of symbol, on first OFDM symbol of subframe, send, the place frequency location is determined by system descending bandwidth and cell ID (Identity abbreviates ID as).
PHICH is used to carry acknowledgement/non-acknowledgement (ACK/NACK) feedback information of uplink transmission data.The number of PHICH, time-frequency position can be determined by system message and the sub-district ID in the Physical Broadcast Channel (Physical Broadcast Channel abbreviates PBCH as) of the descending carrier at PHICH place.
PDCCH is used for bearing downlink control information (Downlink Control Information abbreviates DCI as), comprising: uplink and downlink schedule information, and uplink power control information.The form of DCI (DCI format) is divided into following several: DCIformat 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and DCI format 3A etc.; Wherein:
DCI format 0 is used to indicate the scheduling of Physical Uplink Shared Channel (Physical Uplink Shared Channel abbreviates PUSCH as);
DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D are used for the different mode of a PDSCH code word scheduling;
DCI format 2, DCI format 2A, DCI format 2B are used for the different mode of space division multiplexing;
DCI format 3, DCI format 3A are used for the different mode of the power control instruction of Physical Uplink Control Channel (Physical Uplink Control Channel abbreviates PUCCH as) and PUSCH.
The physical resource of Physical Downlink Control Channel (PDCCH) transmission is with control channel element (Control Channel Element, abbreviate CCE as) be unit, the size of a CCE is 9 resource element groups (Resource Element Group, abbreviate REG as), i.e. 36 resource elements (Resource Element), a PDCCH may take 1,2,4 or 8 CCE.These four kinds of PDCCH sizes for taking 1,2,4,8 CCE adopt tree-shaped polymerization (Aggregation), and the PDCCH that promptly takies 1 CCE can be from any CCE position; The PDCCH that takies 2 CCE is from even number CCE position; The CCE position of the integral multiple of the PDCCH that takies 4 CCE since 4; The CCE position of the integral multiple of the PDCCH that takies 8 CCE since 8.
Each polymerization rank (Aggregation level) definition search volume (Search space) comprises the search volume of public (common) and the search volume of subscriber equipment (UE, User Equipment) proprietary (UE-Specific).OFDM symbolic number that the controlled area that the CCE number of whole search volume is indicated by PCFICH in each descending sub frame is shared and the group number of PHICH are determined.UE DCI format by transmission mode of living in the search volume carries out blind Detecting to all possible PDCCH code checks.
In k subframe, the control domain of carrying PDCCH is 0 to N by suite number CCE, k-1 N CCE, kIndividual CCE constitutes.UE should be at each non-discontinuous reception (non-Discontinuous Reception, abbreviate non-DRX as) subframe detect one group of candidate PDCCH to obtain control information, detect and be meant according to all DCI format to be detected PDCCH in organizing is decoded.The candidate PDCCH (PDCCH candidate) that need to detect defines in the mode of search volume, to polymerization grade (aggregation level) L ∈ 1,2,4,8}, search volume
Figure BDA0000058660130000021
Define by one group of candidate PDCCH (PDCCH candidate).The search volume
Figure BDA0000058660130000022
The middle pairing CCE of candidate PDCCH (PDCCH candidate) m is defined by following formula:
Figure BDA0000058660130000023
Wherein, i=0 ..., L-1, m=0 ..., M (L)-1, M (L)Be the search volume
Figure BDA0000058660130000024
In the number of candidate PDCCH (PDCCH candidate) to be checked.
To common search space (common search space), Y k=0, L gets 4 and 8.
To the proprietary search volume of UE (UE-specific search space), L gets 1,2, and 4 and 8.
Y k＝(A·Y k-1)modD，
Y wherein -1=n RNTI≠ 0, A=39827, D=65537,
Figure BDA0000058660130000025
n sIt is a timeslot number in the radio frames.n RNTIBe corresponding RNTI (Radio Network Temporary Identifier).
It is each common search space of 4 and 8 that UE should detect aggregation level, and aggregation level is each proprietary search volume of UE of 1,2,4,8, and the proprietary search volume of common search space and UE can be overlapping.The search volume of concrete detection number of times and correspondence is as shown in table 1:
Table 1
Figure BDA0000058660130000031
UE is set to based on following a kind of transmission mode (transmission mode) by high-level signaling semi-static (semi-statically), receives the PDSCH transfer of data according to the indication of the PDCCH of the search volume of subscriber equipment proprietary (UE-Specific):
Pattern 1: single antenna port; Port 0 (Single-antenna port; Port 0)
Pattern 2: transmit diversity (Transmit diversity)
Mode 3: Open-Loop Spatial Multiplexing (Open-loop spatial multiplexing)
Pattern 4: Closed-Loop Spatial Multiplexing (Closed-loop spatial multiplexing)
Pattern 5: multi-user's multiple-input and multiple-output (Multi-user MIMO)
Pattern 6: closed loop Rank=1 precoding (Closed-loop Rank=1precoding)
Mode 7: single antenna port; Port 5 (Single-antenna port; Port 5)
If UE is set to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network TemporaryIdentifier by high level, abbreviate C-RNTI as) cyclic redundancy check (CRC) (CRC of scrambling, Cyclical Redundancy Check) carry out PDCCH decoding, then UE should be according to the respective sets incompatible decoding PDCCH PDSCH relevant with all of definition in the table 2:
Table 2
Figure BDA0000058660130000041
Figure BDA0000058660130000051
Because senior Long Term Evolution (LTE-A) system needs to insert LTE user, so its operational frequency bands need cover present LTE frequency band, on this frequency range, there has not been the spectral bandwidth of assignable continuous 100MHz, so the immediate problem that LTE-A need solve is to adopt carrier wave to assemble (Carrier Aggregation) technology polymerization several continuous component carrier frequency (frequency spectrum) (Component Carrier) that are distributed on the different frequency range, forms the operable 100MHz bandwidth of LTE-A.Promptly for the frequency spectrum after assembling, be divided into n component carrier frequency (frequency spectrum), the frequency spectrum in each component carrier frequency (frequency spectrum) is continuous.
In the future version Release 11 of LTE-A, because the Requirement Increases that the user inserts, original physical downlink control channel PDCCH resource will be not enough to satisfy new version requirement.Simultaneously, under the scene of heterogeneous network (Heterogeneous Networks), because the different base station type all has stronger interference, macro base station (Macro eNodeB) need be well solved to macro base station (Macro eNodeB) interference problem to the interference problem and the Home eNodeB (Home eNodeB) of little base station (Pico).Therefore, opening up a new PDCCH resource will be the effective scheme that is used to address the above problem.At present, to how determining above-mentioned new PDCCH resource, also not scheme and definition accurately, thus make troubles to practical application.
Summary of the invention
At the Requirement Increases that inserts owing to the user in the correlation technique, original physical downlink control channel PDCCH resource will be not enough to satisfy the problem of new version requirement, the invention provides a kind of transmission method and system of Downlink Control Information, one of to address the above problem at least.
A kind of transmission method of Downlink Control Information is provided according to an aspect of the present invention.
According to the transmission method of Downlink Control Information of the present invention, be applied to the LTE-A system, comprising: the base station sends Downlink Control Information to UE by PDCCH on subframe; Wherein, described PDCCH comprises: main PDCCH and from PDCCH, described base station sends the information of described main PDCCH on the first time-frequency position, described base station sends described information from PDCCH on the second time-frequency position, the information of described main PDCCH comprises being used in reference to shows described indication information from PDCCH, and described information from PDCCH comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel.
A kind of transmission system of Downlink Control Information is provided according to a further aspect in the invention.
According to the transmission system of Downlink Control Information of the present invention, be applied to the LTE-A system, comprising: the base station is used for sending Downlink Control Information by PDCCH on subframe; UE is used to receive described Downlink Control Information; Wherein, described PDCCH comprises: main PDCCH and from PDCCH, the information of described main PDCCH sends on the first time-frequency position, described information from PDCCH sends in the second time-frequency position, the information of described main PDCCH comprises being used in reference to shows described indication information from PDCCH, and described information from PDCCH comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel.
By the present invention, the base station sends the information of main PDCCH on the first time-frequency position of subframe, the base station sends the information from PDCCH on the second time-frequency position of subframe, the information of main PDCCH comprises and is used in reference to the indication information that shows from PDCCH, comprise the schedule information that is used for dispatching uplink and/or DSCH Downlink Shared Channel from the information of PDCCH, solved in the correlation technique because the Requirement Increases that the user inserts, original physical downlink control channel PDCCH resource will be not enough to satisfy the problem of new version requirement, and then the systematic function can guarantee that more users insert the time, and solved interference problem between different base station to a certain extent.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the frame structure schematic diagram according to the fdd mode of correlation technique;
Fig. 2 is the frame structure schematic diagram according to the tdd mode of correlation technique;
Fig. 3 is the schematic diagram according to the transmission method of the Downlink Control Information of the embodiment of the invention;
Fig. 4 is the structured flowchart according to the transmission system of the Downlink Control Information of the embodiment of the invention;
Fig. 5 is the structured flowchart of the transmission system of Downlink Control Information according to the preferred embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 3 is the schematic diagram according to the transmission method of the Downlink Control Information of the embodiment of the invention.As shown in Figure 3, the transmission method of this Downlink Control Information is applied to the LTE-A system, comprises following processing: the base station sends Downlink Control Information to subscriber equipment (UE) by Physical Downlink Control Channel (PDCCH) on subframe; Wherein, PDCCH comprises: main PDCCH and from PDCCH, the base station sends the information of main PDCCH on the first time-frequency position of subframe, the base station sends the information from PDCCH on the second time-frequency position of subframe, the information of main PDCCH comprises and is used in reference to the indication information that shows from PDCCH, comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel from the information of PDCCH.
In the correlation technique, in the future version Release 11 of LTE-A, because the Requirement Increases that the user inserts, original physical downlink control channel PDCCH resource will be not enough to satisfy new version requirement.Adopt said method, carry out relevant design, guaranteed the systematic function when more users insert at hypotactic PDCCH in the LTE-Advance system, and solution to a certain degree the interference problem between different base station.
Preferably, the first time-frequency position of the main PDCCH correspondence of above-mentioned subframe is: the first area of first time slot of subframe, the perhaps first area of first time slot of subframe, wherein, the Downlink Control Information that the first time-frequency position sends is the Downlink Control Information of configuration to subframe; Perhaps, the first time-frequency position of the main PDCCH correspondence of subframe is: second time slot of subframe, wherein, the Downlink Control Information that the first time-frequency position sends is the Downlink Control Information of configuration to next subframe.
Preferably, the second time-frequency position from the PDCCH correspondence of above-mentioned subframe is: the first area of first time slot of subframe, the perhaps second area of first time slot of subframe, perhaps second of subframe time slot, perhaps second of first time slot of subframe zone and second time slot, wherein, the Downlink Control Information of second time-frequency position transmission is the Downlink Control Information of configuration to subframe; Perhaps, the second time-frequency position from the PDCCH correspondence of subframe is: second time slot of subframe, wherein, the Downlink Control Information that the second time-frequency position sends is the Downlink Control Information of configuration to next subframe.
Wherein, the first area of above-mentioned first time slot is in first time slot, the zone at the PDCCH place of base station configuration; The second area of first time slot is in first time slot, the zone at the PDSCH place of base station configuration.
Preferably, above-mentioned indication information can comprise following one of at least:
From the shared positional information of PDCCH, wherein, positional information comprise following one or more: from the time slot position information at PDCCH place; Positional information from the CCE at PDCCH place; PRB index from the PDCCH place;
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal DMRS antenna end slogan from PDCCH;
DMRS scrambler sign from PDCCH;
DMRS number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
In preferred implementation process, the above-mentioned first and second time-frequency positions can adopt predetermined mode to determine, also can notify UE by high-level signaling is which kind of time-frequency position of adopting.That is, UE determines the first and second time-frequency positions according to predetermined way; Perhaps UE determines the first and second time-frequency positions by the high-level signaling that receives.
Preferably, under carrier aggregation scene, above-mentioned being used to indicates the indication information from PDCCH to comprise: on a main PDCCH Serving cell of indication or a plurality of Serving cell from the schedule information of PDCCH; The above-mentioned schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel comprises: the schedule information of PDSCH and/or PUSCH on a PDCCH Serving cell of indication or a plurality of Serving cell.In practice, above-mentioned Serving cell also can be described as component carrier.
Preferably, sending on the second time-frequency position before the information of PDCCH in the base station, can also comprise following processing: the Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, wherein, combined coding is for to merge into one or more DCI format with a plurality of descending control information format DCI format.
Handle the blind check blocking rate that can reduce the blind check number of times of PDCCH and reduce PDCCH, the Performance And Reliability of raising system by above-mentioned combined coding.
Preferably, the above-mentioned Downlink Control Information that comprises from PDCCH with all or part of Serving cell correspondence carries out combined coding and can comprise one of following the processing:
(1) the uplink authorization information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, and the downstream grants information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding;
(2) the uplink authorization information and the downstream grants information that comprise from PDCCH of all or part of Serving cell correspondence are carried out combined coding jointly.
Preferably, the base station is before sending the information of main PDCCH on the first time-frequency position of subframe, can also comprise following processing: the Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence is comprised carries out combined coding, wherein, combined coding is for to merge into one or more DCI format with a plurality of DCI format.
Preferably, the above-mentioned Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence is comprised carries out combined coding and can comprise one of following the processing:
(1) among the main PDCCH with all or part of part Serving cell correspondence, be used for indicating the Downlink Control Information of uplink authorization information (UL Grant) to carry out combined coding from PDCCH, and among the main PDCCH with all or part of Serving cell correspondence, be used for indicating the Downlink Control Information of downstream grants information (DL Grant) to carry out combined coding from PDCCH.
(2) among the main PDCCH with all or part of Serving cell correspondence, be used for indicating from the Downlink Control Information of the uplink and downlink authorization message of PDCCH and carry out combined coding jointly.
Preferably, the base station information that sends main PDCCH on the first time-frequency position of subframe may further include: the Downlink Control Information notice UE that the base station comprises main PDCCH by high-level signaling, SIBx signaling or broadcast.
Preferably, the Downlink Control Information that comprises of main PDCCH comprise following one of at least:
The positional information that main PDCCH is shared, wherein, above-mentioned positional information comprise following one of at least: from the time slot position information at PDCCH place, from the positional information of the control channel Elements C CE at PDCCH place, from the PRB index at PDCCH place;
The modulation coding mode of main PDCCH;
The transmission mode of main PDCCH;
The load size of main PDCCH;
The demodulated reference signal DMRS antenna end slogan of main PDCCH;
The DMRS scrambler sign of main PDCCH;
The DMRS number of layers sign of main PDCCH;
The carrier wave sign of main PDCCH;
The polymerization grade of main PDCCH.
Preferably, the base station sends Downlink Control Information to UE, at receiving terminal, can also comprise following processing:
Handle one: UE detects main PDCCH;
Wherein, for publicly-owned search volume, UE to main PDCCH detect comprise one of following:
(1) UE detects the descending control information format of two kinds of load sizes according to the transmission mode information of base station configuration on the PDCCH of base station configuration time-frequency position;
(2) UE detects from the descending control information format of the schedule information load size of PDCCH, perhaps, UE detects from PDCCH1 with from the descending control information format of the schedule information load size of PDCCH2, wherein, from PDCCH, from PDCCH1 and definite from the big or small mode of predefined mode or high-level signaling notice that adopts of the schedule information load of PDCCH2, the candidate PDCCH number maintenance predetermined number of the polymerization grade that UE detects is constant;
(3) UE obtains the information of PDCCH according to the notice of high-level signaling;
Wherein, be used to indicate the Physical Downlink Shared Channel schedule information, be used to indicate physical uplink shared channel scheduling information from PDCCH2 from PDCCH1; Perhaps, be used to indicate physical uplink shared channel scheduling information, be used to indicate the Physical Downlink Shared Channel schedule information from PDCCH2 from PDCCH1.
Wherein, for the proprietary search volume of user, UE detects main PDCCH and comprises: UE detects from the descending control information format of the schedule information load size of PDCCH, perhaps, UE detects from PDCCH1 with from the descending control information format of the schedule information load size of PDCCH2, wherein, from PDCCH, determine from PDCCH1 with from the schedule information load size predefined mode of employing of PDCCH2 or the mode of high-level signaling notice, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of one or more polymerization grade on predetermined number;
Wherein, be used to indicate the Physical Downlink Shared Channel schedule information, be used to indicate physical uplink shared channel scheduling information from PDCCH2 from PDCCH1; Perhaps, be used to indicate physical uplink shared channel scheduling information, be used to indicate the Physical Downlink Shared Channel schedule information from PDCCH2 from PDCCH1.
Be described below in conjunction with three kinds of modes.
Mode one
For publicly-owned search volume, UE is according to the transmission mode information of base station configuration, the DCI format of two kinds of load sizes of blind Detecting on the PDCCH of base station configuration time-frequency position;
For the proprietary search volume of user, UE carries out blind Detecting to main PDCCH and comprises one of following:
(1) UE detects a kind of DCI format X, wherein, the load size of DCI format X adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or smaller or equal to 32.
(2) UE detects two kinds of DCI format X1 and X2, wherein, the load size of DCI format X1 and X2 adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or smaller or equal to 32.
Mode two
For publicly-owned search volume, UE detects a kind of DCI format X, perhaps, UE detects two kinds of DCI format X1 and X2, wherein, DCI format X, X1 and X2 load size adopt the mode of predefined mode or high-level signaling notice to determine that the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant; For example, the polymerization grade of detection be 4, and the candidate PDCCH number of 8} be respectively 2,4}.
For the proprietary search volume of user, UE carries out blind Detecting to main PDCCH and comprises one of following:
(1) UE detects a kind of DCI format X, wherein, the load size of DCI format X adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or smaller or equal to 32.
(2) UE detects two kinds of DCI format X1 and X2, wherein, the load size of DCI format X1 and X2 adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or smaller or equal to 32.
Mode three
For publicly-owned search volume, UE obtains the information of PDCCH according to the notice of high-level signaling;
For the proprietary search volume of user, UE carries out blind Detecting to main PDCCH and comprises one of following:
(1) UE detects a kind of DCI format X, wherein, the load size of DCI format X adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 28 or smaller or equal to 44.
(2) UE detects two kinds of DCI format X1 and X2, wherein, the load size of DCI format X1 and X2 adopts the mode of predefined mode or high-level signaling notice to determine, the candidate PDCCH number of the polymerization grade that UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of each polymerization grade on predetermined number.
For example, the polymerization grade { 1,2 of detection, 4, the candidate PDCCH number of 8} is respectively { 6,6,2,2} perhaps increases the candidate PDCCH number of each polymerization grade, the polymerization grade is { 1,2,4, the candidate PDCCH number of 8} is respectively { 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 12 or smaller or equal to 28.
It should be noted that DCI format X is used to represent the schedule information from PDCCH; DCI format X1 and X2 are respectively applied for expression from PDCCH1 with from the schedule information of PDCCH2, are used to represent the Physical Downlink Shared Channel schedule information from PDCCH1, are used to represent physical uplink shared channel scheduling information from PDCCH2; Perhaps be used to represent physical uplink shared channel scheduling information, be used to represent the Physical Downlink Shared Channel schedule information from PDCCH2 from PDCCH1.
It should be noted that above-mentioned publicly-owned search volume has comprised preceding 16 control channel elements of the first time-frequency position.The proprietary search volume of user is the control channel element of the first time-frequency position.
Preferably, above-mentioned UE detects main PDCCH and includes but not limited to following processing: under the scene of multi-carrier polymerizing, UE only detects the publicly-owned search volume on the main Serving cell.
Handle two: UE obtains the indication information from PDCCH from main PDCCH;
Handle three: UE is according to the schedule information of indication information by the up and/or DSCH Downlink Shared Channel that obtains all or part of Serving cell from PDCCH.
Describe above-mentioned preferred implementation in detail below in conjunction with three embodiment.
Embodiment one:
In the LTE-Advance system,, on the first time-frequency position of subframe and the second time-frequency position, send Physical Downlink Control Channel information at the base station end.Wherein, the above-mentioned first time-frequency position corresponding physical down control channel is called main PDCCH, and the second time-frequency position corresponding physical down control channel is called from PDCCH.
The above-mentioned first time-frequency position refers to the zone at Physical Downlink Control Channel (PDCCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is the indicated value of Physical Control Format Indicator Channel (PCFICH), and original position is first OFDM symbol of each subframe.
The above-mentioned second time-frequency position refers to the zone at Physical Downlink Shared Channel (PDSCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is less than or equal to the number of symbols that DSCH Downlink Shared Channel occupies, original position is a n OFDM symbol of subframe, and the indicated value that said n equals the Physical Control Format Indicator Channel (PCFICH) of subframe adds 1.
The indication information of above-mentioned main PDCCH comprises one or more from the following message of PDCCH:
(comprise resource allocation type and resource time-frequency positional information) from the shared time-frequency position of PDCCH;
Time slot position information from the PDCCH place;
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
Above-mentioned transmission can adopt predetermined mode to determine from the second time-frequency position of PDCCH, and also can notify UE by high-level signaling is which kind of time-frequency position of adopting.
Alternatively, the above-mentioned second time-frequency position can also refer to the zone at Physical Downlink Control Channel (PDCCH) place, with the first time-frequency position consistency.
The indication information of main PDCCH comprises one or more from the following message of PDCCH:
From the shared time-frequency position of PDCCH (positional information that comprises control channel Elements C CE);
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
Wherein, above-mentioned Physical Downlink Shared Channel and/or the Uplink Shared Channel that is used to dispatch one or more Serving cell (perhaps being called component carrier) of each user's correspondence from PDCCH.
Above-mentioned each Serving cell correspondence include descending control information format (DCI format) from PDCCH, and the Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, merge into one or more DCI format, the blind check blocking rate that can reduce the blind check number of times of PDCCH and reduce PDCCH, the Performance And Reliability of raising system.
The Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, following several method can be arranged:
Method one: the uplink authorization information (UL Grant) that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, and the downstream grants information (DL Grant) that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding.
The uplink and downlink authorization message carry out respectively behind the combined coding from PDCCH, correspond respectively to a main PDCCH; Perhaps uplink and downlink authorization message carry out respectively behind the combined coding from PDCCH, adopt same main PDCCH to indicate its detection information.
Method two: the uplink and downlink authorization message that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding jointly.
The uplink and downlink authorization message carry out jointly behind the combined coding from PDCCH, adopt same main PDCCH to indicate its detection information.
At subscriber equipment (UE) end, main PDCCH is carried out blind Detecting, detected main PDCCH is used to indicate the coherent detection information from PDCCH, by obtain the schedule information of the up and/or DSCH Downlink Shared Channel on all Serving cells from PDCCH.
Particularly, when the UE end carries out blind Detecting, need the DCI format of publicly-owned search volume and the proprietary search volume of user be detected.Following several mode is arranged:
Mode one: for publicly-owned search volume, UE is according to the transmission mode information of base station configuration, on the PDCCH of base station configuration time-frequency position, carry out blind Detecting, and for the proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned search volume, UE is according to the transmission mode information of base station configuration, the DCI format of two kinds of load sizes of blind Detecting, and according to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 4,2} needs blind Detecting 12 times.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI formatX), DCI format X is a kind of new DCI format, its load size adopts the mode of predefined mode or high-level signaling notice, is used to indicate the schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein, A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or 32.
Table 3
Figure BDA0000058660130000141
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16.
Mode two: for the publicly-owned and proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned proprietary search volume, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 2,4} needs blind Detecting 6 times.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or 32.
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.In publicly-owned search volume, according to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 2,4} needs blind Detecting 12 times.In the proprietary search volume of user, according to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16.
Mode three: for publicly-owned search volume, UE obtains corresponding PDCCH information according to the notice of high-level signaling, and for the proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned search volume, UE does not need to detect.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 28 or 44.
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 12 or 28.
Embodiment two:
In the LTE-Advance system, the base station end sends Physical Downlink Control Channel information on the first time-frequency position of each subframe and the second time-frequency position.The Physical Downlink Control Channel of the first time-frequency position is called main PDCCH, and the Physical Downlink Control Channel of the second time-frequency position is called from PDCCH.
The first time-frequency position refers to the zone at Physical Downlink Control Channel (PDCCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is the indicated value of Physical Control Format Indicator Channel (PCFICH), and original position is first OFDM symbol of each subframe.
The second time-frequency position refers to the zone at Physical Downlink Shared Channel (PDSCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is less than or equal to the number of symbols that DSCH Downlink Shared Channel occupies, original position is a n OFDM symbol of subframe, wherein, the n indicated value that equals the Physical Control Format Indicator Channel (PCFICH) of subframe adds 1.
The indication information of main PDCCH comprises one or more from the following message of PDCCH:
(comprise resource allocation type and resource time-frequency positional information) from the shared time-frequency position of PDCCH;
Time slot position information from the PDCCH place;
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
Above-mentioned transmission can adopt predetermined mode to determine from the second time-frequency position of PDCCH, and also can notify UE by high-level signaling is which kind of time-frequency position of adopting.
Alternatively, the above-mentioned second time-frequency position can also refer to the zone at Physical Downlink Control Channel (PDCCH) place, with the first time-frequency position consistency.
The indication information of main PDCCH comprises one or more from the following message of PDCCH:
From the shared time-frequency position of PDCCH (positional information that comprises control channel Elements C CE);
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
The Physical Downlink Shared Channel and/or the Uplink Shared Channel that are used to dispatch one or more Serving cell (perhaps being called component carrier) of each user's correspondence from PDCCH.
Wherein, each Serving cell corresponding one from PDCCH, it comprises descending control information format (DCI format) and is used to dispatch Physical Downlink Shared Channel and/or Uplink Shared Channel.The Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence comprises carries out combined coding, merge into one or more DCI format, with blind check number of times that reduces PDCCH and the blind check blocking rate that reduces PDCCH, improve the Performance And Reliability of system.
Combined coding can have following several method:
Method one: among the main PDCCH of all or part Serving cell correspondence, be used for indicating the Downlink Control Information of uplink authorization information (UL Grant) to carry out combined coding from PDCCH, among the main PDCCH of all or part Serving cell correspondence, be used for indicating the Downlink Control Information of downstream grants information (DL Grant) to carry out combined coding in addition from PDCCH.
Method two: among the main PDCCH of all or part Serving cell correspondence, be used for indicating from the Downlink Control Information of the uplink and downlink authorization message of PDCCH and carry out combined coding jointly.High-level signaling, SIBx signaling or broadcast are notified the load size of the main PDCCH behind the combined coding.
At subscriber equipment (UE) end, main PDCCH is carried out blind Detecting, detected main PDCCH is used to indicate the coherent detection information from PDCCH, by obtain the schedule information of the up and/or DSCH Downlink Shared Channel on all Serving cells from PDCCH.
When the UE end carries out blind Detecting, need the DCI format of publicly-owned search volume and the proprietary search volume of user be detected.Mainly comprise following several mode:
Mode one: for publicly-owned search volume, UE is according to the transmission mode information of base station configuration, on the PDCCH of base station configuration time-frequency position, carry out blind Detecting, and for the proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned search volume, UE is according to the transmission mode information of base station configuration, the DCI format of two kinds of load sizes of blind Detecting, and according to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 4,2} needs blind Detecting 12 times.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or 32.
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 60 times.As shown in table 3, the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16.
Mode two: for the publicly-owned and proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned proprietary search volume, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 2,4} needs blind Detecting 6 times.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As shown in table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16 or 32.
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.In publicly-owned search volume, according to table 1, the polymerization grade is that { 4, the candidate PDCCH number of 8} is respectively that { 2,4} needs blind Detecting 12 times.In the proprietary search volume of user, according to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 16.
Mode three: for publicly-owned search volume, UE obtains corresponding PDCCH information according to the notice of high-level signaling, and for the proprietary search volume of user, UE carries out blind Detecting to main PDCCH earlier on the first time-frequency position, then according to the indication information of main PDCCH, on the corresponding second time-frequency position to detecting and decipher from PDCCH.Be described in detail below.
In publicly-owned search volume, UE does not need to detect.
In the proprietary search volume of user, for main PDCCH, adopt a kind of descending control information format X (DCI format X), be used to indicate schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 16 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 28 or 44.
Perhaps two kinds of descending control information format X1 and X2 (DCI format X1 and X2) are used to indicate the schedule information from PDCCH.According to table 1, the polymerization grade is that { 1,2,4, the candidate PDCCH number of 8} is respectively that { 6,6,2,2} needs blind Detecting 32 times.Perhaps increase the candidate PDCCH number of each polymerization grade, the blind check number of times up to publicly-owned and proprietary search volume is no more than till 44 or 60 times.As table 3: the polymerization grade be 1,2,4, and the candidate PDCCH number of 8} be respectively 6+A, 6+B, 2+C, 2+D}, wherein A, B, C and D are positive integer, A+B+C+D is smaller or equal to 12 or 28.
Embodiment three:
In the LTE-Advance system, the base station end sends Physical Downlink Control Channel information on the first time-frequency position of each subframe and the second time-frequency position.The Physical Downlink Control Channel of the first time-frequency position is called main PDCCH, and the Physical Downlink Control Channel of the second time-frequency position is called from PDCCH.
The above-mentioned first time-frequency position refers to the zone at Physical Downlink Control Channel (PDCCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is the indicated value of Physical Control Format Indicator Channel (PCFICH), and original position is first OFDM symbol of each subframe.
The above-mentioned second time-frequency position refers to the zone at Physical Downlink Shared Channel (PDSCH) place of base station configuration, the OFDM number of symbols that occupies on its time domain is less than or equal to the number of symbols that DSCH Downlink Shared Channel occupies, original position is a n OFDM symbol of subframe, wherein, the n indicated value that equals the Physical Control Format Indicator Channel (PCFICH) of subframe adds 1.
The indication information of above-mentioned main PDCCH comprises one or more from the following message of PDCCH:
(comprise resource allocation type and resource time-frequency positional information) from the shared time-frequency position of PDCCH;
Time slot position information from the PDCCH place;
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
Above-mentioned transmission can adopt predetermined mode to determine from the second time-frequency position of PDCCH, and also can notify UE by high-level signaling is which kind of time-frequency position of adopting.
Alternatively, the above-mentioned second time-frequency position can also refer to the zone at physical downlink control channel PDCCH place, with the first time-frequency position consistency.
The indication information of above-mentioned main PDCCH comprises one or more from the following message of PDCCH:
From the shared time-frequency position of PDCCH (positional information that comprises control channel Elements C CE);
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
The Physical Downlink Shared Channel and/or the Uplink Shared Channel that are used to dispatch one or more Serving cell (perhaps being called component carrier) of each user's correspondence from PDCCH.
Each Serving cell correspondence include descending control information format (DCI format) from PDCCH, and the Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, merge into one or more DCI format.
Perhaps; The Downlink Control Information that the main PDCCH of above-mentioned all or part of Serving cell correspondence is comprised carries out combined coding, merges into one or more DCI format.
Notify UE by high-level signaling, SIBx signaling or broadcast, the information of main PDCCH comprise following one or more:
The time-frequency position (positional information that comprises control channel Elements C CE) that main PDCCH is shared;
The modulation coding mode of main PDCCH;
The transmission mode of main PDCCH;
The load size of main PDCCH;
The demodulated reference signal of main PDCCH (DMRS) antenna end slogan;
The demodulated reference signal of main PDCCH (DMRS) scrambler sign;
The demodulated reference signal of main PDCCH (DMRS) number of layers sign;
The carrier wave sign of main PDCCH;
The polymerization grade of main PDCCH.
At receiving terminal, UE detects and deciphers main PDCCH according to high-level signaling, SIBx signaling or broadcast, and detecting and deciphering from PDCCH main PDCCH indication.
Fig. 4 is the structured flowchart according to the transmission system of the Downlink Control Information of the embodiment of the invention.Wherein, be applied to the LTE-A system, as shown in Figure 4, the transmission system of this Downlink Control Information comprises:
Base station 40 is used for sending Downlink Control Information by Physical Downlink Control Channel (PDCCH) on subframe;
Subscriber equipment (UE) 42 is used to receive Downlink Control Information;
Wherein, PDCCH comprises: main PDCCH and from PDCCH, the information of main PDCCH sends on the first time-frequency position of subframe, send in the second time-frequency position of subframe from the information of PDCCH, the information of main PDCCH comprises and is used in reference to the indication information that shows from PDCCH, comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel from the information of PDCCH.
Adopt said system, guaranteed the systematic function when more users insert, and solution to a certain degree the interference problem between different base station.
Preferably, the first time-frequency position of the main PDCCH correspondence of the subframe n of subframe, on second time slot of the subframe n-1 of subframe, send, perhaps on the first area of first time slot of subframe n, send, perhaps on the second area of first time slot of subframe n, send.
Preferably, the second time-frequency position of the subframe n of subframe from the PDCCH correspondence, on second time slot of the subframe n-1 of subframe, send, perhaps on the first area of first time slot of subframe n, send, perhaps on the second area of first time slot of subframe n, send, perhaps on second time slot of subframe n, send, perhaps on second zone of first time slot of subframe n and second time slot, send jointly.
Wherein, the first area of first time slot is in first time slot, the zone at the PDCCH place of base station configuration; The second area of first time slot is in first time slot, the zone at the PDSCH place of base station configuration.
Above-mentioned main PDCCH be used to indicate from the indication information of PDCCH comprise following one or more:
From the shared positional information of PDCCH (comprise following one or more: from the time slot position information at PDCCH place; Positional information from the control channel Elements C CE at PDCCH place; PRB index from the PDCCH place);
Modulation coding mode from PDCCH;
Transmission mode from PDCCH;
Load size from PDCCH;
Demodulated reference signal (DMRS) antenna end slogan from PDCCH;
Demodulated reference signal (DMRS) scrambler sign from PDCCH;
Demodulated reference signal (DMRS) number of layers sign from PDCCH;
Carrier wave sign from PDCCH;
Polymerization grade from PDCCH.
Preferably, the above-mentioned first and second time-frequency positions can adopt predetermined mode to determine, also can notify UE by high-level signaling is which kind of time-frequency position of adopting.
Preferably, as shown in Figure 5, base station 40 comprises: first coding module 400, be used for the Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, wherein, combined coding is for to merge into one or more DCI format with a plurality of descending control information format DCI format.
Preferably, as shown in Figure 5, base station 40 comprises: second coding module 402 is used for the Downlink Control Information that the main PDCCH with all or part of Serving cell correspondence comprises and carries out combined coding, wherein, combined coding is for to merge into one or more DCI format with a plurality of DCI format.
Under carrier aggregation scene, the Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence can be comprised carries out combined coding, merges into one or more descending control information format DCI format.Notify UE by high-level signaling, SIBx signaling or broadcast.Wherein, the Downlink Control Information that comprises of main PDCCH comprise following one or more:
The time-frequency position (positional information that comprises control channel Elements C CE) that main PDCCH is shared;
The modulation coding mode of main PDCCH;
The transmission mode of main PDCCH;
The load size of main PDCCH;
The demodulated reference signal of main PDCCH (DMRS) antenna end slogan;
The demodulated reference signal of main PDCCH (DMRS) scrambler sign;
The demodulated reference signal of main PDCCH (DMRS) number of layers sign;
The carrier wave sign of main PDCCH;
The polymerization grade of main PDCCH.
Preferably, as shown in Figure 5, UE 42 may further include: detection module 420 is used for main PDCCH is carried out blind Detecting; First acquisition module 422 is used for obtaining indication information from PDCCH from main PDCCH; Second acquisition module 424 is used for according to the schedule information of indication information by the up and/or DSCH Downlink Shared Channel that obtains whole Serving cells from PDCCH.
At receiving terminal, UE detects and deciphers main PDCCH according to high-level signaling, SIBx signaling or broadcast, and detecting and deciphering from PDCCH main PDCCH indication.
In sum, by the foregoing description provided by the invention, under the carrier aggregation scene in the LTE-A system, in the PDCCH structure to the principal and subordinate, the PDCCH of a plurality of carrier waves carries out combined coding, guarantee the systematic function when more users insert, and solved the interference problem between different base station to a certain extent.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, carry out by calculation element thereby they can be stored in the storage device, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (21)

1. the transmission method of a Downlink Control Information is applied to senior Long Term Evolution LTE-A system, it is characterized in that, comprising:
The base station sends Downlink Control Information to user equipment (UE) by physical downlink control channel PDCCH on subframe;
Wherein, described PDCCH comprises: main PDCCH and from PDCCH, described base station sends the information of described main PDCCH on the first time-frequency position, described base station sends described information from PDCCH on the second time-frequency position, the information of described main PDCCH comprises being used in reference to shows described indication information from PDCCH, and described information from PDCCH comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel.
2. method according to claim 1 is characterized in that,
The described first time-frequency position of the main PDCCH correspondence of described subframe is: the first area of first time slot of described subframe, the perhaps first area of first time slot of described subframe, wherein, the Downlink Control Information of described first time-frequency position transmission is the Downlink Control Information of configuration to described subframe; Perhaps, the described first time-frequency position of the main PDCCH correspondence of described subframe is: second time slot of described subframe, wherein, the Downlink Control Information that the described first time-frequency position sends is the Downlink Control Information of configuration to next subframe.
The described second time-frequency position from the PDCCH correspondence of described subframe is: the first area of first time slot of described subframe, the perhaps second area of first time slot of described subframe, perhaps second of described subframe time slot, perhaps second of first time slot of described subframe zone and second time slot, wherein, the Downlink Control Information of described second time-frequency position transmission is the Downlink Control Information of configuration to described subframe; Perhaps, the described second time-frequency position from the PDCCH correspondence of described subframe is: second time slot of described subframe, wherein, the Downlink Control Information that the described second time-frequency position sends is the Downlink Control Information of configuration to next subframe.
3. method according to claim 2 is characterized in that,
The first area of described first time slot is in first time slot, the zone at the PDCCH place of base station configuration;
The second area of described first time slot is in first time slot, the zone at the PDSCH place of base station configuration.
4. method according to claim 3 is characterized in that, described indication information comprise following one of at least:
Described from the shared positional information of PDCCH;
Described modulation coding mode from PDCCH;
Described transmission mode from PDCCH;
Described load size from PDCCH;
Described demodulated reference signal DMRS antenna end slogan from PDCCH;
Described DMRS scrambler sign from PDCCH;
Described DMRS number of layers sign from PDCCH;
Described carrier wave sign from PDCCH;
Described polymerization grade from PDCCH;
Wherein, described positional information comprise following one of at least:
From the time slot position information at PDCCH place,
From the positional information of the control channel Elements C CE at PDCCH place,
PRB index from the PDCCH place.
5. method according to claim 2 is characterized in that, described UE determines the described first time-frequency position and the second time-frequency position according to the predefine mode; Perhaps described UE determines the described first time-frequency position and the second time-frequency position by the high-level signaling that receives.
6. method according to claim 1 is characterized in that, under carrier aggregation scene,
Described being used to indicates described indication information from PDCCH to comprise: on a described main PDCCH Serving cell of indication or a plurality of Serving cell from the schedule information of PDCCH;
The described schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel comprises: described on a PDCCH Serving cell of indication or a plurality of Serving cell schedule information of PDSCH and/or PUSCH.
7. method according to claim 1 is characterized in that, described base station sends described before the information of PDCCH on the described second time-frequency position, also comprises:
The Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, and wherein, described combined coding is for to merge into one or more descending control information formats with a plurality of descending control information formats.
8. method according to claim 7 is characterized in that, the described Downlink Control Information that comprises from PDCCH with all or part of Serving cell correspondence carries out combined coding and comprises one of following:
The uplink authorization information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, and the downstream grants information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding;
The uplink authorization information and the downstream grants information that comprise from PDCCH of all or part of Serving cell correspondence are carried out combined coding jointly.
9. method according to claim 1 is characterized in that, described base station also comprised before sending the information of described main PDCCH on the first time-frequency position of described subframe:
The Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence is comprised carries out combined coding, wherein,
Described combined coding is for to merge into one or more descending control information formats with a plurality of descending control information formats.
10. method according to claim 9 is characterized in that, the described Downlink Control Information that the main PDCCH of all or part of Serving cell correspondence is comprised carries out combined coding and comprises one of following:
Among the main PDCCH with all or part of Serving cell correspondence, be used for indicating from the Downlink Control Information of the uplink authorization information of PDCCH and carry out combined coding, and among the main PDCCH with all or part of Serving cell correspondence, be used for indicating from the Downlink Control Information of the downstream grants information of PDCCH and carry out combined coding;
Among the main PDCCH with all or part of Serving cell correspondence, be used for indicating and carry out combined coding jointly from the uplink authorization information of PDCCH and the Downlink Control Information of downstream grants information.
11. according to claim 9 or 10 described methods, it is characterized in that, the Downlink Control Information that described main PDCCH comprises comprise following one of at least:
The shared positional information of described main PDCCH;
The modulation coding mode of described main PDCCH;
The transmission mode of described main PDCCH;
The load size of described main PDCCH;
The demodulated reference signal DMRS antenna end slogan of described main PDCCH;
The DMRS scrambler sign of described main PDCCH;
The DMRS number of layers sign of described main PDCCH;
The carrier wave sign of described main PDCCH;
The polymerization grade of described main PDCCH;
Wherein, described positional information comprise following one of at least:
From the time slot position information at PDCCH place,
From the positional information of the control channel Elements C CE at PDCCH place,
PRB index from the PDCCH place.
12. method according to claim 1 is characterized in that, described base station sends described Downlink Control Information to the described UE, also comprises:
Described UE detects described main PDCCH;
Described UE is by obtaining described indication information from PDCCH among the main PDCCH;
Described UE is according to the described schedule information of described indication information by the up and/or DSCH Downlink Shared Channel that obtains all or part of Serving cell from PDCCH.
13. method according to claim 12 is characterized in that, for publicly-owned search volume, described UE to described main PDCCH detect comprise one of following:
Described UE detects the descending control information format of two kinds of load sizes according to the transmission mode information of described base station configuration on the PDCCH of described base station configuration time-frequency position;
Described UE detects from the descending control information format of the schedule information load size of PDCCH, perhaps, described UE detects from PDCCH1 with from the descending control information format of the schedule information load size of PDCCH2, wherein, described from PDCCH, from PDCCH1 and definite from the big or small mode of predefined mode or high-level signaling notice that adopts of the schedule information load of PDCCH2, the candidate PDCCH number maintenance predetermined number of the polymerization grade that described UE detects is constant;
Described UE obtains the information of PDCCH according to the notice of high-level signaling;
Wherein, describedly be used to indicate the Physical Downlink Shared Channel schedule information, describedly be used to indicate physical uplink shared channel scheduling information from PDCCH2 from PDCCH1; Perhaps, describedly be used to indicate physical uplink shared channel scheduling information, describedly be used to indicate the Physical Downlink Shared Channel schedule information from PDCCH2 from PDCCH1.
14. method according to claim 13 is characterized in that,
Described publicly-owned search volume has comprised preceding 16 control channel elements of the described first time-frequency position.
15. method according to claim 12 is characterized in that, for the proprietary search volume of user, described UE to described main PDCCH detect comprise one of following:
Described UE detects from the descending control information format of the schedule information load size of PDCCH, perhaps, described UE detects from PDCCH1 with from the descending control information format of the schedule information load size of PDCCH2, wherein, described from PDCCH, from PDCCH1 and definite from the big or small mode of predefined mode or high-level signaling notice that adopts of the schedule information load of PDCCH2, the candidate PDCCH number of the polymerization grade that described UE detects keeps predetermined number constant, perhaps increases the candidate PDCCH number of one or more polymerization grade on described predetermined number;
Wherein, describedly be used to indicate the Physical Downlink Shared Channel schedule information, describedly be used to indicate physical uplink shared channel scheduling information from PDCCH2 from PDCCH1; Perhaps, describedly be used to indicate physical uplink shared channel scheduling information, describedly be used to indicate the Physical Downlink Shared Channel schedule information from PDCCH2 from PDCCH1.
16. method according to claim 15 is characterized in that,
The proprietary search volume of described user is the control channel element of the described first time-frequency position.
17. method according to claim 12 is characterized in that, described UE detects described main PDCCH and comprises:
Under the scene of multi-carrier polymerizing, UE only detects the publicly-owned search volume on the main Serving cell.
18. the transmission system of a Downlink Control Information is applied to senior Long Term Evolution LTE-A system, it is characterized in that, comprising:
The base station is used for sending Downlink Control Information by physical downlink control channel PDCCH on subframe;
User equipment (UE) is used to receive described Downlink Control Information;
Wherein, described PDCCH comprises: main PDCCH and from PDCCH, the information of described main PDCCH sends on the first time-frequency position of described subframe, described information from PDCCH sends in the second time-frequency position of described subframe, the information of described main PDCCH comprises being used in reference to shows described indication information from PDCCH, and described information from PDCCH comprises the schedule information that is used to dispatch physical uplink and/or DSCH Downlink Shared Channel.
19. system according to claim 18 is characterized in that, described base station comprises:
First coding module is used for the Downlink Control Information that comprises from PDCCH of all or part of Serving cell correspondence is carried out combined coding, and wherein, described combined coding is for to merge into one or more descending control information formats with a plurality of descending control information formats.
20. system according to claim 18 is characterized in that, described base station comprises:
Second coding module is used for the Downlink Control Information that the main PDCCH with all or part of Serving cell correspondence comprises and carries out combined coding, and wherein, described combined coding is for to merge into one or more descending control information formats with a plurality of descending control information formats.
21. system according to claim 18 is characterized in that, described UE comprises:
Detection module is used for described main PDCCH is detected;
First acquisition module is used for obtaining described indication information from PDCCH by main PDCCH;
Second acquisition module is used for according to described indication information by the described described schedule information of obtaining the up and/or DSCH Downlink Shared Channel of whole Serving cells from PDCCH.
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