CN106454694A - Downlink control information sending method and apparatus, and downlink control information reception method and apparatus - Google Patents

Abstract

The invention provides a downlink control information sending method and apparatus, and a downlink control information reception method and apparatus. The downlink control information sending method includes: a base station determines employed DCI sizes or DCI formats or resources employed by DCI during primary DCI transmission at least according to one of following information: the coverage enhancement grade, resource distribution indication, types of scheduled messages, and a search space set, wherein the same DCI size corresponds to at least one DCI format; and the base station sends the DCI through the DCI format corresponding to the determined employed DCI size, or the base station sends the DCI through the determined employed DCI format. According to the methods and apparatuses, the problem of high complexity for receiving and detecting downlink control information by low-cost and coverage enhanced MTC terminals is solved, and the complexity for receiving and detecting downlink control information by the low-cost and coverage enhanced MTC terminals is reduced.

Description

Downlink Control Information sending, receiving method and device

Technical field

The present invention relates to the communications field, in particular to a kind of Downlink Control Information sending, receiving method and device.

Background technology

Machine type communication (Machine Type Communication, referred to as MTC) user terminal (User Equipment, Abbreviation user equipment or terminal), also known as, machine to machine (Machine to Machine, abbreviation M2M) user communication device, It is the main application form of current Internet of Things.In recent years, due to Long Term Evolution (Long-Term Evolution, referred to as LTE) The frequency spectrum effect of/advanced long-term evolution system (Long-Term Evolution Advance, referred to as LTE-Advance or LTE-A) Rate is high, and increasing mobile operator selects LTE/LTE-A as the evolution tendency of system of broadband wireless communication.It is based on The MTC multiple types data service of LTE/LTE-A also will be more attractive.

Existing LTE/LTE-A system is transmitted based on each subframe dynamic dispatching, and that is, each subframe all can be transmitted not Same control channel.

Physical Downlink Control Channel defined in LTE/LTE-A (Physical Downlink Control Channel, referred to as PDCCH) and strengthen Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel, referred to as EPDCCH).

Physical Control Format Indicator Channel (Physical Control Format Indicator Channel, referred to as PCFICH) holds The information carrying is used for OFDM (the Orthogonal Frequency Division that PDCCH is transmitted in instruction in a subframe Multiplexing, referred to as OFDM) symbol number.

Physical mixed HARQ (Automatic Repeat-request, referred to as ARQ) indicates channel (Physical Hybrid-ARQ Indicator Channel, referred to as PHICH) for carrying the acknowledgement/non-acknowledgement of uplink transmission data (ACK/NACK) feedback information.

Down control channel adopts blind Detecting, and terminal is attempted with different polymerization grade and candidate's collected explanations or commentaries in certain search space Adjust down control channel.

As shown in Table 1 and Table 2, Candidate Set corresponding to different polymerization grade for the search space forms the proprietary search space of existing UE, Need to attempt demodulating each Candidate Set until demodulation is correct, otherwise it is assumed that being not received by one's name during terminal demodulation control channel Control channel.

PDCCH/EPDCCH is used for bearing downlink control information (Downlink Control Information, referred to as DCI), Including：Uplink and downlink schedule information, and uplink power control information.

Table 1PDCCH search space example

Table 2EPDCCH search space example

Generally MTC terminal can obtain DCI by demodulating PDCCH/EPDCCH channel in each subframe, to realize to thing The demodulation physical uplink of reason DSCH Downlink Shared Channel (Physical Downlink Share Channel, referred to as PDSCH) is shared The scheduling configured information of channel (Physical Uplink Share Channel, referred to as PUSCH).Terminal is except attempting with not With polymerization grade and Candidate Set in search space blind Detecting down control channel in addition it is also necessary to attempt at most two kinds of DCI of detection Size size.In different transmission modes, two kinds of DCI format attempting detection are also not all the same.

In MTC application terminal, at least include two types terminal, a Terminal Type is referred to as low due to radio frequency reception Bandwidth-Constrained Cost terminal, another kind of limited by terminal present position or self-characteristic thus leading to covering performance to be remarkably decreased, referred to as cover Strengthen terminal.For example, intelligent meter data recording class MTC terminal is fixedly mounted under the low covering performance environment such as basement mostly, and it is main Send away a parcel data, and the requirement to data rate is low, can tolerate larger data transmission delay.Coverage enhancement terminal is led to Cross and the modes such as transmission is repeated several times to ensure the correct transmission of data in time domain.

When repeating to transmit DCI, because Bandwidth-Constrained makes PDCCH unavailable.On the premise of polymerization grade is certain, DCI Size (size) number of iterative transfer times can be affected.For coverage enhancement terminal, required schedule information content can letter Change, (Compact) DCI that simplifies using less size carries out repeating to transmit, and reduces iterative transfer times, leads to new DCI Form.For low cost terminals, dispatching flexibility also can be limited by the arrowband of reception bandwidth, affect resource allocation and then lead to New DCI format.Even if therefore under same transmission mode, also resulting in the detection of multiple DCI format, increase terminal-pair The blind check complexity of Downlink Control Information.Therefore in general, for the MTC terminal being operated in LTE/LTE-A system, Need during blind Detecting Downlink Control Information to reduce detection complexity.

Receive the high problem of detection Downlink Control Information complexity, mesh for low cost in correlation technique and coverage enhancement MTC terminal Before there is no the scheme of efficiently solving.

Content of the invention

The invention provides a kind of Downlink Control Information sending, receiving method and device, at least to solve low cost and coverage enhancement MTC terminal receives the high problem of detection Downlink Control Information complexity.

According to an aspect of the invention, it is provided a kind of downlink control information sending method, including：Base station is according at least to following One of information determine DCI size size or DCI format format that can use during Downlink Control Information DCI transmission or The resource that DCI uses：Coverage enhancement grade CE, resource distribution instruction RA, scheduled type of message, search space set； Wherein, same DCI size corresponding at least one DCI format；A kind of DCI size that can use to determine for the described base station Corresponding DCI format sends described DCI, or described base station sends institute with a kind of DCI format that can use determining State DCI.

Alternatively, the resource that described DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or described DCI scheduling The resource that used of physical down Traffic Channel PDSCH in time domain Discrete Distribution.

Alternatively, according to coverage enhancement grade, the determination mode of Discrete Distribution in time domain includes the resource that described DCI uses：Root Determine iterative transfer times N of described DCI according to coverage enhancement grade, wherein, when repeating to transmit described DCI, with M son Frame is to repeat transmission cycle, Y described repetition transmission cycle of transmission, is used for transmitting described DCI's in described repetition transmission cycle Number of sub frames is k；Wherein, N, M, Y are positive integer, and k ＜ M, k × Y=N.

Alternatively, user equipment determines the value of M according to the mode of one below：The configuration that predefined, base station issues.

Alternatively, user equipment determines the value of Y or k according to the mode of at least one of：Predefined, according under base station The configuration sent out determines, base station issues one group of possible configuration and possible in this group according to blind Detecting result by described user equipment Determine in configuration, determined according to N value.

Alternatively, the described DCI size that described base station can use when determining and once transmit according at least to described coverage enhancement grade Or DCI format includes one below：Described base station determine each different coverage enhancement grade use different DCI size or DCI format, identical coverage enhancement grade uses one or two DCI size or DCI format；Described base station determines many Individual different coverage enhancement grade uses one or two DCI size or DCI format, except the plurality of different coverage enhancement Other coverage enhancement grades outside grade are using another kind of or other two DCI size or DCI format；Described base station determines institute There are different coverage enhancement grades only using one or two DCI size or DCI format；Wherein, as the DCI size using When species is two kinds, then every kind of size only corresponds to a kind of DCI format；When the species of the DCI size using is a kind of, this A kind of DCI size corresponding at least one DCI format.

Alternatively, in the case of one below, a kind of mixed transport is supported by DCI format scheduling indicating downlink Traffic Channel Pattern：Respectively using a kind of DCI format, every kind of coverage enhancement grade and non-covered strengthen grade respectively to every kind of coverage enhancement grade Using a kind of DCI format, one or more different coverage enhancement grades use a kind of DCI format, one or more differences Coverage enhancement grade and non-covered strengthen grade respectively using a kind of DCI format, all coverage enhancement grades use a kind of DCI Format, all coverage enhancement grades and non-covered strengthen grade and use a kind of DCI format；

In the case of one below, indicating downlink Traffic Channel is dispatched by different DCI format and supports different mixed transport Pattern：Respectively using two kinds of DCI format, every kind of coverage enhancement grade and non-covered strengthen grade respectively to every kind of coverage enhancement grade Using two kinds of DCI format, one or more different coverage enhancement grades use two kinds of DCI format, one or more differences Coverage enhancement grade and non-covered strengthen grade respectively using two kinds of DCI format, all coverage enhancement grades use two kinds of DCI Format, all coverage enhancement grades and non-covered strengthen grade and use two kinds of DCI format；

Wherein, described mixed transmission modes refer to that reference for demodulation signal DMRS type and/or port need to indicate.

Alternatively, described mixed transmission modes carry out one of following mode by the bit domain in DCI and indicate：Instruction non-multicast/group Broadcast Single Frequency Network (MBSFN) subframe and DMRS transmission mode is also based on based on CRS transmission mode；Indicate all subframe bases It is also based on DMRS two-port transmission mode in the single-ended port transmission of DMRS.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. In the case of level, the 3rd coverage enhancement grade, described base station determines that each different coverage enhancement grade uses different DCI size Or DCI format, identical coverage enhancement grade included using one or two DCI size or DCI format：Described base Stand the described first coverage enhancement grade of determination, described second coverage enhancement grade, described 3rd coverage enhancement grade respectively using the One DCI size or DCI format, the 2nd DCI size or DCI format, the 3rd DCI size or DCI format；Described base Determination non-covered of standing strengthens using the 4th DCI size or DCI format, wherein, a described DCI size or DCI format Including one or two DCI size or DCI format, and/or, described 2nd DCI size or DCI format includes one kind Or two kinds of DCI size or DCI format, and/or, described 3rd DCI size or DCI format includes one or two DCI size or DCI format, and/or, described 4th DCI size includes one or two DCI size or DCI format.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. In the case of level, the 3rd coverage enhancement grade, described base station determines that multiple different coverage enhancement grades use one or two DCI size or DCI format, other coverage enhancement grades in addition to the plurality of different coverage enhancement grade are using another kind of Or the DCI size or DCI format of other two include one below：Described base station determines that non-covered strengthens and uses one or two DCI size or DCI format, described first coverage enhancement grade, described second coverage enhancement grade and described 3rd cover increase Strong grade is using another kind of or other two DCI size or DCI format；Described base station determines that non-covered strengthens and covers with described first Lid strengthens grade and uses one or two DCI size or DCI format, described second coverage enhancement grade and described 3rd covering Strengthen grade using another kind of or other two DCI size or DCI format；Described base station determine non-covered strengthen, described first Coverage enhancement grade and described second coverage enhancement grade use one or two DCI size or DCI format, and the described 3rd covers Lid strengthens grade using another kind of or other two DCI size or DCI format.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. In the case of level, the 3rd coverage enhancement grade, described base station determines all different coverage enhancement grades only using one or two DCI size or DCI format include one below：Described base station determine non-covered enhancing, described first coverage enhancement grade, Described second coverage enhancement grade and described 3rd coverage enhancement grade use same or two kinds DCI size or DCI format； Described base station determines that described first coverage enhancement grade, described second coverage enhancement grade and described 3rd coverage enhancement grade use Same or two kinds of DCI size or DCI format.

Alternatively, according at least to described coverage enhancement grade, described base station determines that described DCI size or DCI format includes：Institute State base station to determine for the enhanced DCI of non-covered using one or two DCI size or DCI format, wherein, carry and be used for The machine type communication MTC Physical Downlink Control Channel M-PDCCH of the enhanced DCI of non-covered or enhancing physical down control letter The transmission means that road EPDCCH takes arrowband includes：Distributed transmission and/or localized transmission, in corresponding search space at least Candidate Set including the maximum polymerization grade of described transmission means.

Alternatively, to determine that described DCI size or DCI format includes according at least to described resource distribution instruction following for described base station One of：Described base station determines that a DCI format and the 2nd DCI format uses a kind of DCI size, wherein, described first Do not indicate arrowband in the resource distribution instruction of DCI format, in the resource distribution instruction of described 2nd DCI format, indicate arrowband, A described DCI format includes filling bit, and described filling bit is used for filling a described DCI format, so that described First DCI format and described 2nd DCI format has identical DCI size；Described base station determines that the 3rd DCI uses one Plant or two kinds of DCI size or DCI format, wherein, be pre-configured with described 3rd DCI whether indicate arrowband by base station；Institute State base station and determine that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, described 4th DCI format Resource distribution instruction bit field comprise not indicate that arrowband only indicates the 4th frequency domain instruction of resource allocation in arrowband and is used for indicating 4th time domain instruction of coverage enhancement iterative transfer times, the resource distribution instruction bit field of described 5th DCI format comprises to refer to Show the 5th frequency domain instruction of resource allocation in arrowband and arrowband and the 5th time domain instruction for indicating coverage enhancement iterative transfer times, The bit that described 4th time domain instruction takies is more than the bit that described 5th time domain instruction takies, described 4th DCI format The resource distribution instruction bit field of resource distribution instruction bit field and described 5th DCI format there is identical size.

Alternatively, described base station according at least to described resource distribution instruction determine described DCI size or DCI format also include with One of lower：Described base station determines that the 6th DCI format uses a kind of DCI size, wherein, by using described 6th DCI format DCI scheduling type of message determine whether described 6th DCI format indicates resource allocation in arrowband or arrowband；Described base station Determine that the 7th DCI format uses a kind of DCI size, the 8th DCI is using two kinds of DCI distributing indicating mode for different resource Size or DCI format, wherein, described 7th DCI format is used for coverage enhancement, and described 8th DCI is used for non-covered and increases By force, by the corresponding coverage enhancement grade of described 7th DCI format determine described 7th DCI format whether indicate arrowband or Resource allocation in arrowband；Described base station determine the 9th DCI using support the 9th resource distribution instruction mode a kind of DCI size or DCI format, the tenth DCI uses another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, wherein, Determine it is to support described 9th resource distribution instruction mode or the tenth resource distribution instruction mode by the quantity that search space is gathered； When the quantity of search space set is 1, determination is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction side Formula；When the quantity of search space set is 2, determine that the 9th resource distribution instruction mode is supported in first search space, second The tenth resource distribution instruction mode is supported in the set of individual search space；Described base station determines the 11st DCI using support the 11st resource A kind of DCI size or DCI format of distribution indicating mode, the 12nd DCI is using the 12nd resource distribution instruction mode of support Another kind of DCI size or DCI format, wherein, the type gathered by search space determines it is to support that described 11st resource is divided Join indicating mode or the 12nd resource distribution instruction mode；Only corresponding 11st DCI of the type of every kind of search space set or One of 12nd DCI DCI.

Alternatively, according at least to described type of message, described base station determines that described DCI size or DCI format includes one below： In the case that the type of message of described DCI scheduling is accidental access response RAR, described base station determines that the 13rd DCI uses One of form 1C or form 1A, the DCI size that the 14th DCI uses is the size of single user RAR message, its In, described 13rd DCI is the DCI using during using RAR scheduling mode, and described 14th DCI is no to be adjusted using RAR Single user RAR message during degree mode；In the case that the type of message of described DCI scheduling is RAR, described base station determines It is single user RAR message that 15th DCI uses two kinds of DCI size or DCI format, the DCI size that the 16th DCI uses Size, wherein, a kind of transmission means of RAR message is pre-configured with by base station, described transmission means includes RAR dispatching party Formula and RAR no scheduling mode, described 15th DCI is the DCI using during using RAR scheduling mode, described 16th DCI Be using RAR no scheduling mode when single user RAR message；In the case that the type of message of described DCI scheduling is RAR, It is single that described base station determines that the 17th DCI uses two kinds of DCI size or DCI format, the DCI size that the 18th DCI uses The size of user's RAR message, wherein, determines it is using RAR scheduling mode or to adopt by resource location or search space type With RAR no scheduling mode, described 17th DCI is the DCI using during using RAR scheduling mode, described 18th DCI Be using RAR no scheduling mode when single user RAR message；In the case that the type of message of described DCI scheduling is RAR, Described base station determines that the 19th DCI uses two kinds of DCI size or DCI format, and the 20th DCI uses both DCI size Or one of DCI format DCI size or DCI format, wherein, described 19th DCI is using RAR scheduling mode When the DCI that uses, described 20th DCI be using RAR no scheduling mode when single user RAR message；Wherein, pass through Bit number in reduction single user RAR message makes in itself and two kinds of DCI size or DCI format of described 19th DCI The size of kind of DCI size or DCI format is identical, or, by increase using RAR scheduling mode two kinds of DCI size or The bit number of one of DCI format DCI size or DCI format so that this kind of DCI size or DCI format with described The DCI size that 20th DCI the uses or size of DCI format is identical.

Alternatively, described base station sends described DCI and includes：Described base station is used in mixed way bag in the different subframes once repeating to transmit Containing the different enhancing control channel unit ECCE strengthening resource unit group EREG quantity repeat to transmit described DCI include with down to One of few：Support two kinds of maximum polymerization grade AL when different subframes take arrowband, respectively AL=24ECCE and AL=12ECCE, wherein, one of AL=24ECCE ECCE comprises 4 EREG, 1 in AL=12ECCE ECCE comprises 8EREG；Only support a kind of polymerization grade AL in different subframes, run into the son that 1 ECCE comprises 8EREG During frame, do not use or skip or destroy the ECCE sequence number exceeding maximum ECCE quantity.

Alternatively, described base station sends described DCI in different subframes and includes at least one of：In TDD system In, the resource merging in continuous two special subframes is used and is used alone the resource in other subframes by described base station, with Repeat to transmit described DCI；When non-covered strengthens, according to hopping pattern during coverage enhancement when sending described DCI in different subframes Sample is in different subframes using different frequency domains or arrowband position.

Alternatively, described base station according to machine type communication MTC Physical Downlink Control Channel M-PDCCH or strengthens under physics The optional arrowband set of row control channel EPDCCH determines arrowband indicating mode, wherein, with M-PDCCH with remaining arrowband set Or arrowband identical position in EPDCCH place is as one of arrowband location status indicating.

According to another aspect of the present invention, additionally provide a kind of Downlink Control Information dispensing device, be applied to base station, including： According at least to one of following information, determining module, for determining that the DCI that can use during a Downlink Control Information DCI transmission is big The resource that little size or DCI format format or DCI use：Coverage enhancement grade CE, resource distribution instruction RA, scheduled Type of message, search space set；Wherein, same DCI size corresponding at least one DCI format；Sending module, uses In a kind of DCI size corresponding DCI format described DCI of transmission that can use to determine, or described base station is to determine A kind of DCI format that can use send described DCI.

According to another aspect of the present invention, additionally provide a kind of Downlink Control Information method of reseptance, including：User equipment (UE) is extremely Few DCI size size or DCI format being determined according to one of following information during Downlink Control Information DCI transmission of blind Detecting The resource that format or DCI uses：Coverage enhancement grade CE, resource distribution instruction RA, scheduled type of message, search Spatial aggregation；Wherein, same DCI size corresponding at least one DCI format；Described UE can use according to determine The described DCI that DCI size or base station described in DCI format blind Detecting issue.

Alternatively, the resource that described DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or described DCI scheduling The resource that used of physical down Traffic Channel PDSCH in time domain Discrete Distribution.

Alternatively, according to coverage enhancement grade, the determination mode of Discrete Distribution in time domain includes the resource that described DCI uses：Root Determine iterative transfer times N of described DCI according to coverage enhancement grade, wherein, when repeating to transmit described DCI, with M son Frame is to repeat transmission cycle, Y described repetition transmission cycle of transmission, is used for transmitting described DCI's in described repetition transmission cycle Number of sub frames is k；Wherein, N, M, Y are positive integer, and k ＜ M, k × Y=N.

Alternatively, user equipment determines the value of M according to the mode of one below：The configuration that predefined, base station issues.

Alternatively, user equipment determines the value of Y or k according to the mode of at least one of：Predefined, according under base station The configuration sent out determines, base station issues one group of possible configuration and possible in this group according to blind Detecting result by described user equipment Determine in configuration, determined according to N value.

Alternatively, the described DCI size that described UE can use when determining and once transmit according at least to described coverage enhancement grade Or DCI format includes one below：Described UE determine each different coverage enhancement grade use different DCI size or DCI format, identical coverage enhancement grade uses one or two DCI size or DCI format；Described UE determines many Individual different coverage enhancement grade uses one or two DCI size or DCI format, except the plurality of different coverage enhancement Other coverage enhancement grades outside grade are using another kind of or other two DCI size or DCI format；Described UE determines institute There are different coverage enhancement grades only using one or two DCI size or DCI format；Wherein, as the DCI size using When species is two kinds, then every kind of size only corresponds to a kind of DCI format；When the species of the DCI size using is a kind of, this A kind of DCI size corresponding at least one DCI format.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. In the case of level, the 3rd coverage enhancement grade, described UE determines that each different coverage enhancement grade uses different DCI size Or DCI format, identical coverage enhancement grade included using one or two DCI size or DCI format：Described UE Determine described first coverage enhancement grade, described second coverage enhancement grade, described 3rd coverage enhancement grade respectively using first DCI size or DCI format, the 2nd DCI size or DCI format, the 3rd DCI size or DCI format；Described UE Determine that non-covered strengthens and use the 4th DCI size or DCI format, wherein, a described DCI size or DCI format bag Include one or two DCI size or DCI format, and/or, described 2nd DCI size or DCI format include one kind or Two kinds of DCI size or DCI format, and/or, described 3rd DCI size or DCI format includes one or two DCI Size or DCI format, and/or, described 4th DCI size includes one or two DCI size or DCI format.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. In the case of level, the 3rd coverage enhancement grade, described UE determines that multiple different coverage enhancement grades use one or two DCI size or DCI format, other coverage enhancement grades in addition to the plurality of different coverage enhancement grade are using another kind of Or the DCI size or DCI format of other two include one below：Described UE determines that non-covered strengthens and uses one or two DCI size or DCI format, described first coverage enhancement grade, described second coverage enhancement grade and described 3rd cover increase Strong grade is using another kind of or other two DCI size or DCI format；Described UE determines that non-covered strengthens and covers with described first Lid strengthens grade and uses one or two DCI size or DCI format, described second coverage enhancement grade and described 3rd covering Strengthen grade using another kind of or other two DCI size or DCI format；Described UE determine non-covered strengthen, described first Coverage enhancement grade and described second coverage enhancement grade use one or two DCI size or DCI format, and the described 3rd covers Lid strengthens grade using another kind of or other two DCI size or DCI format.

Alternatively, include successively from low to high in described coverage enhancement grade：First coverage enhancement grade, second coverage enhancement etc. Level, in the case of the 3rd coverage enhancement grade, described UE determine all different coverage enhancement grades only using one or two DCI size or DCI format includes one below：Described UE determines non-covered enhancing, described first coverage enhancement grade, institute State the second coverage enhancement grade and described 3rd coverage enhancement grade uses same or two kinds DCI size or DCI format；Institute Stating UE determines described first coverage enhancement grade, described second coverage enhancement grade and described 3rd coverage enhancement grade using same Kind or two kinds of DCI size or DCI format.

Alternatively, according at least to described coverage enhancement grade, described UE determines that described DCI size or DCI format includes：Institute State UE to determine for the enhanced DCI of non-covered using one or two DCI size or DCI format, wherein, carry and be used for The machine type communication MTC Physical Downlink Control Channel M-PDCCH of the enhanced DCI of non-covered or enhancing physical down control letter The transmission means that road EPDCCH takes arrowband includes：Distributed transmission and/or localized transmission, in corresponding search space at least Candidate Set including the maximum polymerization grade of described transmission means.

Alternatively, to determine that described DCI size or DCI format includes according at least to described resource distribution instruction following for described UE One of：Described UE determines that a DCI format and the 2nd DCI format uses a kind of DCI size, wherein, described first Do not indicate arrowband in the resource distribution instruction of DCI format, in the resource distribution instruction of described 2nd DCI format, indicate arrowband, A described DCI format includes filling bit, and described filling bit is used for filling a described DCI format, so that described First DCI format and described 2nd DCI format has identical size；Described UE determine the 3rd DCI using a kind of or Two kinds of DCI size or DCI format, wherein, are pre-configured with described 3rd DCI whether indicate arrowband by base station；Described UE Determine that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, the money of described 4th DCI format Source is distributed indication bit domain and is comprised not indicate arrowband and only indicate the 4th frequency domain instruction of resource allocation in arrowband and for instruction covering Strengthen the 4th time domain instruction of iterative transfer times, the resource distribution instruction bit field of described 5th DCI format comprises to indicate narrow 5th frequency domain instruction of resource allocation and the 5th time domain instruction for indicating coverage enhancement iterative transfer times, institute in band and arrowband The bit stating the 4th time domain instruction occupancy is more than the bit that described 5th time domain instruction takies, described 4th DCI format's Resource distribution instruction bit field has identical size with the resource distribution instruction bit field of described 5th DCI format.

Alternatively, described UE according at least to described resource distribution instruction determine described DCI size or DCI format also include with One of lower：Described UE determines that the 6th DCI format uses a kind of DCI size, wherein, by using described 6th DCI format DCI scheduling type of message determine whether described 6th DCI format indicates resource allocation in arrowband or arrowband；Described UE Determine that the 7th DCI format uses a kind of DCI size, the 8th DCI is using two kinds of DCI distributing indicating mode for different resource Size or DCI format, wherein, described 7th DCI format is used for coverage enhancement, and described 8th DCI is used for non-covered and increases By force, by the corresponding coverage enhancement grade of described 7th DCI format determine described 7th DCI format whether indicate arrowband or Resource allocation in arrowband；Described UE determine the 9th DCI using support the 9th resource distribution instruction mode a kind of DCI size or DCI format, the tenth DCI uses another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, wherein, Determine it is to support described 9th resource distribution instruction mode or the tenth resource distribution instruction mode by the quantity that search space is gathered； When the quantity of search space set is 1, determination is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction side Formula；When the quantity of search space set is 2, determine that the 9th resource distribution instruction mode is supported in first search space, second The tenth resource distribution instruction mode is supported in the set of individual search space；Described UE determines the 11st DCI using support the 11st resource A kind of DCI size or DCI format of distribution indicating mode, the 12nd DCI is using the 12nd resource distribution instruction mode of support Another kind of DCI size or DCI format, wherein, the type gathered by search space determines it is to support that described 11st resource is divided Join indicating mode or the 12nd resource distribution instruction mode；Only corresponding 11st DCI of the type of every kind of search space set or One of 12nd DCI DCI.

Alternatively, according at least to described type of message, described UE determines that described DCI size or DCI format includes one below： In the case that the type of message of described DCI scheduling is accidental access response RAR, described UE determines that the 13rd DCI uses lattice One of formula 1C or form 1A, the DCI size that the 14th DCI uses is the size of single user RAR message, wherein, Described 13rd DCI is the DCI using during using RAR scheduling mode, and described 14th DCI is using RAR no dispatching party Single user RAR message during formula；In the case that the type of message of described DCI scheduling is RAR, described UE determines the tenth It is the big of single user RAR message that five DCI use two kinds of DCI size or DCI format, the DCI size that the 16th DCI uses Little, wherein, a kind of transmission means of RAR message is pre-configured with by base station, described transmission means include RAR scheduling mode and RAR no scheduling mode, described 15th DCI is the DCI using during using RAR scheduling mode, and described 16th DCI is Using RAR no scheduling mode when single user RAR message；In the case that the type of message of described DCI scheduling is RAR, It is single that described UE determines that the 17th DCI uses two kinds of DCI size or DCI format, the DCI size that the 18th DCI uses The size of user's RAR message, wherein, determines it is using RAR scheduling mode or to adopt by resource location or search space type With RAR no scheduling mode, described 17th DCI is the DCI using during using RAR scheduling mode, described 18th DCI Be using RAR no scheduling mode when single user RAR message；In the case that the type of message of described DCI scheduling is RAR, Described UE determines that the 19th DCI uses two kinds of DCI size or DCI format, and the 20th DCI uses both DCI size Or one of DCI format DCI size or DCI format, wherein, described 19th DCI is using RAR scheduling mode When the DCI that uses, described 20th DCI be using RAR no scheduling mode when single user RAR message；Wherein, pass through Bit number in reduction single user RAR message makes in itself and two kinds of DCI size or DCI format of described 19th DCI The size of kind of DCI size or DCI format is identical, or, by increase using RAR scheduling mode two kinds of DCI size or The bit number of one of DCI format DCI size or DCI format so that this kind of DCI size or DCI format with described The DCI size that 20th DCI the uses or size of DCI format is identical.

Alternatively, described UE issues according to the DCI size that can use determining or base station described in DCI format blind Detecting Described DCI includes one below：In TDD system, described UE is in continuous two special subframes or other sons Blind Detecting is carried out on frame, to repeat to receive described DCI；When non-covered strengthens, press when receiving described DCI in different subframes According to frequency pattern during coverage enhancement in different subframes using different frequency domains or arrowband position.

Alternatively, described UE according to machine type communication MTC Physical Downlink Control Channel M-PDCCH or strengthens under physics The optional arrowband set of row control channel EPDCCH determines arrowband indicating mode, wherein, with M-PDCCH with remaining arrowband set Or arrowband identical position in EPDCCH place is as one of arrowband location status indicating.

According to another aspect of the present invention, additionally provide a kind of Downlink Control Information reception device, be applied to user equipment (UE), Including：Determining module, for determining DCI during Downlink Control Information DCI transmission of blind Detecting according at least to one of following information The resource that size size or DCI format format or DCI use：Coverage enhancement grade CE, resource distribution instruction RA, adjusted The type of message of degree, search space set；Wherein, same DCI size corresponding at least one DCI format；Receiver module, For issued according to the base station described in resource blind Detecting that the DCI size that can use determining or DCI format or DCI uses Described DCI.

By the present invention, the DCI size that can use during a DCI transmission is determined using base station according at least to one of following information Or the resource that DCI format or DCI uses：Coverage enhancement grade, resource distribution instruction, scheduled type of message, search Spatial aggregation；Wherein, same DCI size corresponding at least one DCI format；Base station one kind that can use to determine DCI size corresponding DCI format sends DCI, or base station sends DCI with a kind of DCI format that can use determining Mode, solve the problems, such as low cost and coverage enhancement MTC terminal receive detection Downlink Control Information complexity high, reduce Low cost and coverage enhancement MTC terminal receive the complexity detecting Downlink Control Information.

Brief description

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present invention shows Meaning property embodiment and its illustrate for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：

Fig. 1 is the flow chart of downlink control information sending method according to embodiments of the present invention；

The DCI that Fig. 2 a is according to embodiments of the present invention repeats the schematic diagram one that subframe when transmitting takies；

The DCI that Fig. 2 b is according to embodiments of the present invention repeats the schematic diagram two that subframe when transmitting takies；

The DCI that Fig. 2 c is according to embodiments of the present invention repeats the schematic diagram three that subframe when transmitting takies；

Fig. 3 is the flow chart of Downlink Control Information method of reseptance according to embodiments of the present invention；

Fig. 4 is the structural representation of Downlink Control Information dispensing device according to embodiments of the present invention；

Fig. 5 is the structural representation of Downlink Control Information reception device according to embodiments of the present invention；

Fig. 6 is the schematic diagram of difference time-frequency location according to the preferred embodiment of the invention；

Fig. 7 is a kind of schematic diagram of arrowband according to the preferred embodiment of the invention indicating means.

Specific embodiment

To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the case of not conflicting, Embodiment in the application and the feature in embodiment can be mutually combined.

It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second " etc. are to use In the similar object of difference, without for describing specific order or precedence.

Provide a kind of downlink control information sending method in the present embodiment, Fig. 1 is descending control according to embodiments of the present invention The flow chart that information sends, as shown in figure 1, this flow process comprises the steps：

Step S102, base station determines DCI size or DCI that can use during a DCI transmission according at least to one of following information The resource that format or DCI uses：Coverage enhancement grade, resource distribution instruction, scheduled type of message, search space collection Close；Wherein, same DCI size corresponding at least one DCI format；

Step S104, base station sends DCI with the corresponding DCI format of a kind of DCI size that can use determining, or base Stand and DCI is sent with a kind of DCI format that can use determining.

By above-mentioned steps, according to the information that can be known altogether according to base station and terminal, for example, coverage enhancement grade, resource allocation Instruction, scheduled type of message, search space set etc., determine DCI size or DCI that can use during a DCI transmission Format or DCI use resource so that user equipment can according to determine DCI size or DCI format carry out blind Detection obtains DCI, solves the problems, such as that low cost and coverage enhancement MTC terminal reception detection Downlink Control Information complexity are high, Reduce low cost and coverage enhancement MTC terminal receives the complexity of detection Downlink Control Information.

Alternatively, coverage enhancement grade is also called covering grade, and abbreviated form is CE or CEL, in an embodiment of the present invention To be described taking CE as a example.

Alternatively, the resource that DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or, the physics of DCI scheduling The resource that downlink traffic channel PDSCH is used Discrete Distribution in time domain.More preferably, on frequency domain, available PRB quantity is preferred For 1PRB or 2PRB or 4PRB or 6PRB.By Discrete Mapping coverage enhancement resource, narrowband systems can be solved Obstructing problem between lower difference coverage enhancement grade.

Alternatively, according to coverage enhancement grade, the determination mode of Discrete Distribution in time domain includes the resource that DCI uses：According to covering Lid strengthens iterative transfer times N that grade determines DCI, wherein, when repeating to transmit DCI, with M subframe for repeating to transmit Cycle, Y repetition transmission cycle of transmission, the number of sub frames repeating to be used in transmission cycle transmitting DCI is k；Wherein, N, M, Y is positive integer, and k ＜ M, k × Y=N.

Alternatively, user equipment determines the value of M according to the mode of one below：The configuration that predefined, base station issues.

Alternatively, user equipment determines the value of Y or k according to the mode of at least one of：Predefined, according under base station Send out configuration determine, base station issue one group of possible configuration and by user equipment according to blind Detecting result in the possible configuration of this group Middle determination, according to N value determine.

Due to k × Y=N, therefore, in Y, k, N, the 3rd can be obtained by obtaining any two of which.As：By Y Obtain N with k, wherein, Y can be with dynamic instruction, and k is predefined, or, Y and k is dynamic instruction (being applied to PDSCH), Or, Y is to be semi-statically configured, k is predefined (being applied to down control channel)；Or, Y, wherein, k are obtained by N and k Can be with dynamic instruction, N is predefined or high-level signaling configuration, or, N and k is dynamic instruction or (being applied to PDSCH), N is to be semi-statically configured, and k is predefined (being applied to down control channel).

For coverage enhancement scene, Y is more than 1；For non-covered enhanced scene, Y is equal to 1.

Different coverage enhancement grades can correspond to identical k value, different Y values, or, different coverage enhancement grades are corresponding different K value.

For example, repeat to pass in 100 subframes as determined according to coverage enhancement grade CE3 and in the frequency domain resource of 1PRB Defeated (i.e. iterative transfer times are 100 times), wherein M=30, base station configures k=5, Y=20；Or base station configures one group may Time domain polymerization grade { [k=5, Y=20], [k=10, Y=10], [k=20, Y=5], [k=25, Y=4] } and by terminal blind check Survey and determine k and Y.

As shown in Fig. 2 a～Fig. 2 c, in Fig. 2 a～Fig. 2 c, different filling modes represents that the subframe of different channels takies, or same The channel difference corresponding subframe of coverage enhancement grade takies.Wherein, when DCI repeats to transmit, in multiple M subframes, discrete occupancy is sub Frame resource, supports in M subframe that the subframe of different channels takies, and supports that the same channel difference corresponding subframe of covering grade takies. It should be noted that only illustrating here, the above-mentioned discrete mode taking sub-frame resources is also applied for lower industry taking DCI as a example Business information, or DCI and downlink business simultaneously in the presence of scene.

As shown in Figure 2 b, in M subframe, concurrent multiplexing non-covered strengthens user and the user of different covering grade, now different coverings Grade corresponding different value of K in M subframe.

As shown in Figure 2 c, in M subframe, concurrent multiplexing non-covered strengthens user and the user of different covering grade, now different coverings Grade corresponding identical k value in M subframe, the different Y value of different covering grade correspondences.

It should be noted that the DCI shown in Fig. 2 a～2c repeats to transmit in schematic diagram, it is with 200K arrowband or LTE system In as a example 1 PRB system however not excluded that being applied to the system of other bandwidth.

Alternatively, covering grade can be divided into 3 grades, respectively：Covering grade 1 (CE1), covering grade 2 (CE2), cover Lid grade 3 (CE3), the optional covering grade 0 (CE0) that can also include represents that non-covered strengthens；Resource distribution instruction comprises this The running time-frequency resource of information scheduled in DCI takies instruction；Type of message includes：Accidental access response (RAR), paging (Paging), Wireless heterogeneous networks (RRC), transmitting power control (TPC)；Search space set includes collective number, search space collection class Type.

Preferably, base station can use when determining and once transmit according at least to coverage enhancement grade DCI size or DCI format Including one below：

Base station determines that each different coverage enhancement grade uses different DCI size or DCI format, identical coverage enhancement etc. Level uses one or two DCI size or DCI format；

Base station determines that multiple different coverage enhancement grades use one or two DCI size or DCI format, except multiple differences Coverage enhancement grade outside other coverage enhancement grades using another kind of or other two DCI size or DCI format；

Base station determines all different coverage enhancement grades only using one or two DCI size or DCI format；

Wherein, when the DCI size species using is two kinds, then every kind of size only corresponds to a kind of DCI format；When use When the species of DCI size is a kind of, a kind of this DCI size corresponding at least one DCI format.

Alternatively, in the case of one below, a kind of mixed transport is supported by DCI format scheduling indicating downlink Traffic Channel Pattern：Respectively using a kind of DCI format, every kind of coverage enhancement grade and non-covered strengthen grade respectively to every kind of coverage enhancement grade Using a kind of DCI format, one or more different coverage enhancement grades use a kind of DCI format, one or more differences Coverage enhancement grade and non-covered strengthen grade respectively using a kind of DCI format, all coverage enhancement grades use a kind of DCI Format, all coverage enhancement grades and non-covered strengthen grade and use a kind of DCI format；More preferably, in a coverage enhancement Grade and non-covered strengthen grade respectively using a kind of DCI format in the case of, this coverage enhancement grade is preferably CE1.

In the case of one below, indicating downlink Traffic Channel is dispatched by different DCI format and supports different mixed transport Pattern：Respectively using two kinds of DCI format, every kind of coverage enhancement grade and non-covered strengthen grade respectively to every kind of coverage enhancement grade Using two kinds of DCI format, one or more different coverage enhancement grades use two kinds of DCI format, one or more differences Coverage enhancement grade and non-covered strengthen grade respectively using two kinds of DCI format, all coverage enhancement grades use two kinds of DCI Format, all coverage enhancement grades and non-covered strengthen grade and use two kinds of DCI format；

Wherein, mixed transmission modes refer to that reference for demodulation signal DMRS type and/or port need to indicate.

Alternatively, mixed transmission modes carry out one of following mode by the bit domain in DCI and indicate：Instruction non-multicast/multicast list Frequency network (MBSFN) subframe is also based on DMRS transmission mode based on CRS transmission mode；Indicate that all subframes are based on DMRS Single-ended port transmission is also based on DMRS two-port transmission mode.

For example, when only using a kind of DCI format scheduling corresponding downlink traffic channel transmission：

One of DCI bit field instruction non-MBSFN subframe is needed to be based on CRS port or DMRS port or instruction All subframes are based on DMRS single port or two-port space diversity transmission.For example, the preferred root of the determination mode of CRS port Carry out implying according to the port occupation mode of physical channel (PBCH) and obtain, or port numbers can be indicated by bit field.DMRS port Determination mode indicated by bit field, including port numbers and possible source device channel logo (Source Channel Identifier, referred to as SCID) value.

Example 1：Indicate according to PBCH, non-MBSFN subframe (determines that single port still sends point using CRS port by 1bit Collection) or DMRS single port port 7, and fixing SCID value, such as SCID value are 0；

Example 2：By 2bit indicate non-MBSFN subframe use CRS single port port 0, CRS send diversity port 0 and 1, DMRS single port port 7, DMRS single port port8, the SCID of its middle port 7,8 fixes.

Example 3：Indicate that non-MBSFN subframe uses CRS port by 3bit, or DMRS is port, wherein DMRS port For：DMRS port 7, or DMRS port 8, or DMRS port 7 and DMRS port 9, the value of SCID is 0 Or 1.

Example 4：Indicate that all subframes use DMRS single port or two-port space diversity by 1bit.As indicated port 7 also It is port 7 and port 9.

It should be noted that：Above-mentioned single port port 7 is optional mode, can also be port 7, port 8, port 9, port 10 In any one, determined by way of fixing or instruction.Above-mentioned two-port port 7, port 9 are optional mode, can also be port 7、port 8；port 9、port 10；port 7、port 9；In port 8, port 10 any pair, by fixing or referring to The mode shown determines.Above-mentioned SCID value is optional mode for 0, can also fix or indicate, value is 0 or 1.

Again for example, when scheduling corresponding downlink traffic channel transmission can use two kinds of DCI format：

A kind of DCI format supports the transmission mode based on CRS, and another kind of DCI format supports the transmission based on DMRS Pattern.The fixing port using is indicated according to one of following manner or using the bit field in DCI accordingly.

When using CRS transmission mode：Do not use MBSFN sub-frame based on CRS single port or diversity and；Or it is based on CRS Single port or diversity and MBSFN sub-frame are using based on DMRS single port.

When using DMRS transmission mode：Fixation uses single port, such as port 7；Or, by bit configuration of territory single port and SCID value；Or fixation uses two-port, such as port 7, port 9 (space diversity transmission mode)；Or instruction non-MBSFN Subframe is using the single port being also based on CRS based on the single port of DMRS or diversity (implied by PBHC and determine).

It should be noted that：Above-mentioned single port port 7 is optional mode, can also be port 7, port 8, port 9, port 10 In any one, determined by way of fixing or instruction.Above-mentioned two-port port 7, port 9 are optional mode, can also be port 7、port 8；port 9、port 10；port 7、port 9；In port 8, port 10 any pair, by fixing or referring to The mode shown determines.Above-mentioned SCID value is optional mode for 0, can also fix or indicate, value is 0 or 1.

More preferably, include successively from low to high in coverage enhancement grade：First coverage enhancement grade (being equivalent to above-mentioned CE1), In the case of two coverage enhancement grades (being equivalent to above-mentioned CE2), the 3rd coverage enhancement grade (being equivalent to above-mentioned CE3), base station Determine the first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade respectively using DCI size or DCI Format, the 2nd DCI size or DCI format, the 3rd DCI size or DCI format；Base station determines that non-covered strengthens (phase When in above-mentioned CE0) use the 4th DCI size or DCI format, wherein, a DCI size or DCI format include one Kind or two kinds of DCI size or DCI format, and/or, the 2nd DCI size or DCI format include one or two DCI Size or DCI format, and/or, the 3rd DCI size or DCI format includes one or two DCI size or DCI format, And/or, the 4th DCI size includes one or two DCI size or DCI format.It is each covering grade using each not phase With DCI size or format, every kind of grade respectively using 1 or 2 kind of size or format DCI.

Or, base station determines that non-covered strengthens and uses one or two DCI size or DCI format, the first coverage enhancement grade, Second coverage enhancement grade and the 3rd coverage enhancement grade are using another kind of or other two DCI size or DCI format.That is, CE0 uses different DCI size or format from other covering grades.

Or, base station determines that non-covered strengthens and the first coverage enhancement grade uses one or two DCI size or DCI format, Second coverage enhancement grade and the 3rd coverage enhancement grade are using another kind of or other two DCI size or DCI format.That is, CE0, ce1 and ce2, CE3 use different DCI size or format.

Or, base station determines that non-covered strengthens, the first coverage enhancement grade and the second coverage enhancement grade use one or two DCI size or DCI format, the 3rd coverage enhancement grade is using another kind of or other two DCI size or DCI format.That is, CE0, CE1, CE2 use different DCI size or format from CE3.

Or, base station determines non-covered enhancing, the first coverage enhancement grade, the second coverage enhancement grade and the 3rd coverage enhancement etc. Level is using same or two kinds DCI size or DCI format.That is, CE0, CE1, CE2, CE3 use identical a kind of Or two kinds of DCI size or DCI format；

Or, it is same that base station determines that the first coverage enhancement grade, the second coverage enhancement grade and the 3rd coverage enhancement grade use Or two kinds of DCI size or DCI format.I.e. CE0 can use DCI size or DCI different from CE1, CE2, CE3 format.

Alternatively, when base station determines DCI size or DCI format according at least to coverage enhancement grade, base station determines to be covered for non- Cover enhanced DCI and use one or two DCI size or DCI format, wherein, carry for the enhanced DCI's of non-covered Machine type communication (MTC) Physical Downlink Control Channel (M-PDCCH) or enhancing Physical Downlink Control Channel (EPDCCH) The transmission means taking arrowband includes：Distributed transmission and/or localized transmission, at least include transmission side in corresponding search space The Candidate Set of the maximum polymerization grade of formula.

Alternatively, when base station determines DCI size or DCI format according at least to resource distribution instruction, base station determines a DCI Format and the 2nd DCI format uses a kind of DCI size, wherein, does not refer in the resource distribution instruction of a DCI format Show arrowband, in the resource distribution instruction of the 2nd DCI format, indicate arrowband, a DCI format includes filling bit (padding Bit), filling bit is used for filling the first DCI format, so that a DCI format and the 2nd DCI format has identical size；

Or, base station determines that the 3rd DCI uses one or two DCI size or DCI format, wherein, is joined in advance by base station Put in the 3rd DCI and whether indicate arrowband；

Or, base station determines that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, the 4th DCI The 4th frequency domain instruction and use that the resource distribution instruction bit field of format comprises not indicate arrowband and only indicates resource allocation in arrowband In the 4th time domain instruction of instruction coverage enhancement iterative transfer times, the resource distribution instruction bit field of the 5th DCI format comprises Indicate the 5th frequency domain instruction of resource allocation in arrowband and arrowband and be used for indicating that the 5th time domain of coverage enhancement iterative transfer times refers to Show, the bit that the 4th time domain instruction takies is more than the bit that the 5th time domain instruction takies, the resource of the 4th DCI format is divided The resource distribution instruction bit field joining indication bit domain with the 5th DCI format has identical size.

Alternatively, when base station determines DCI size or DCI format according at least to resource distribution instruction and other information consolidation, Base station determines that the 6th DCI format uses a kind of DCI size, wherein, by disappearing of the DCI scheduling using the 6th DCI format Breath type determines whether the 6th DCI format indicates resource allocation in arrowband or arrowband；

Or, base station determines that the 7th DCI format uses a kind of DCI size, and the 8th DCI refers to using for different resource distribution Show two kinds of DCI size or DCI format of mode, wherein, the 7th DCI format is used for coverage enhancement, and the 8th DCI is used for Non-covered strengthen, by the corresponding coverage enhancement grade of the 7th DCI format determine the 7th DCI format whether indicate arrowband or Resource allocation in arrowband；

Or, base station determines a kind of DCI size or DCI format using the 9th resource distribution instruction mode of support for the 9th DCI, Tenth DCI is using another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, wherein, empty by search Between the quantity of set determine it is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction mode；When search space collection When the quantity closed is 1, determination is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction mode；When search is empty Between the quantity of set when being 2, determine that the 9th resource distribution instruction mode, second search space collection are supported in first search space Close the tenth resource distribution instruction mode of support；

Base station determines a kind of DCI size or DCI format using the 11st resource distribution instruction mode of support for the 11st DCI, 12nd DCI using another kind of DCI size or DCI format of the 12nd resource distribution instruction mode of support, wherein, by searching It is to support the 11st resource distribution instruction mode or the 12nd resource distribution instruction mode that the type of rope spatial aggregation determines；Every kind of One of only corresponding 11st DCI or the 12nd DCI of the type of search space set DCI.

Alternatively, when base station determines DCI size or DCI format according at least to type of message, in the type of message of DCI scheduling In the case of accidental access response (RAR), base station determines that the 13rd DCI uses one of form 1C or form 1A, The DCI size that 14th DCI uses is the size of single user RAR message, and wherein, the 13rd DCI is using RAR scheduling The DCI using during mode, the 14th DCI be using RAR no scheduling mode when single user RAR message；

Or, in the case that the type of message of DCI scheduling is RAR, base station determines that the 15th DCI uses two kinds of DCI size Or DCI format, the DCI size that the 16th DCI uses is the size of single user RAR message, wherein, is joined in advance by base station Put a kind of transmission means of RAR message, transmission means includes RAR scheduling mode and RAR no scheduling mode, the 15th DCI The DCI using during using RAR scheduling mode, the 16th DCI be using RAR no scheduling mode when single user RAR disappear Breath；

Or, in the case that the type of message of DCI scheduling is RAR, base station determines that the 17th DCI uses two kinds of DCI size Or DCI format, the DCI size that the 18th DCI uses is the size of single user RAR message, wherein, by resource location or It is using RAR scheduling mode or to adopt RAR no scheduling mode that search space type determines, the 17th DCI is to adopt RAR The DCI using during scheduling mode, the 18th DCI be using RAR no scheduling mode when single user RAR message；

Or, in the case that the type of message of DCI scheduling is RAR, base station determines that the 19th DCI uses two kinds of DCI size Or DCI format, the 20th DCI use one of both DCI size or DCI format DCI size or DCI format, Wherein, the 19th DCI is the DCI using during using RAR scheduling mode, and the 20th DCI is using RAR no scheduling mode When single user RAR message；Wherein, make the two of itself and the 19th DCI by reducing the bit number in single user RAR message The size planting one of DCI size or DCI format DCI size or DCI format is identical, or, used by increasing The bit number of one of two kinds of DCI size of RAR scheduling mode or DCI format DCI size or DCI format is so that be somebody's turn to do Plant DCI size or DCI format identical with the size of the DCI size that the 20th DCI uses or DCI format.

Alternatively, in step S104, base station is used in mixed way in the different subframes once repeating to transmit and comprises different enhancing resource lists The enhancing control channel unit ECCE of tuple EREG quantity repeats transmission DCI and includes at least one of：

Support two kinds of maximum polymerization grade AL, respectively AL=24ECCE and AL=12ECCE when different subframes take arrowband, Wherein, one of AL=24ECCE ECCE comprises 4 EREG, and 1 in AL=12ECCE ECCE comprises 8EREG；

Only support a kind of polymerization grade AL in different subframes, when running into the subframe that 1 ECCE comprises 8EREG, do not use or Skip or destroy the ECCE sequence number exceeding maximum ECCE quantity.For example, using different polymerization grade and all take 6PRB When, it is mixed that support is used in mixed way AL=24 with AL=12.

Additionally, non-take 6PRB when, using same polymeric grade, support AL=1,2,4,8；In addition no matter search for sky Between frequency domain size be how many, run into 1 using same polymerization grade (comprising AL=1 or 2 or 4 or 8 or 16 or 24ECCE) When individual ECCE comprises the subframe of 8EREG, do not use or skip or destroy the ECCE sequence number exceeding maximum ECCE quantity, such as The subframe that AL=4ECCE comprises 4EREG in 1 ECCE uses ECCE index 0-3, then comprise 8EREG in 1 ECCE Subframe when still using ECCE index 0-3；Subframe as AL=16ECCE comprises 4EREG in 1 ECCE uses ECCE index 0-15, then do not use 12-15 ECCE in the subframe that 1 ECCE comprises 8EREG, using ECCE index 0-11；Subframe as AL=24ECCE comprises 4EREG in 1 ECCE uses ECCE index 0-23, then in 1 ECCE 12-23 ECCE is not used, using ECCE index 0-11 during the subframe comprising 8EREG.

Alternatively, base station sends DCI in different subframes and includes at least one of：

In TDD system, base station uses and the resource merging in continuous two special subframes by other subframes Resource be used alone, with repeat transmit DCI；

When non-covered strengthens, when sending described DCI in different subframes according to frequency pattern during coverage enhancement in different subframes Using different frequency domains or arrowband position.

Wherein, coverage enhancement repeat frequency pattern during transmission be continuous Y physical sub-frame or available subframe using identical frequency domain or Arrowband position, the frequency domain that different continuous Y subframes is used or arrowband position are different, carry out frequency hopping according to frequency pattern, such as A kind of possible frequency pattern is NB_Y2=(NB_Y1+ N/2) mod N, wherein NB_Y1Represent that first group of continuous Y subframe uses Arrowband position, NB_Y2Represent the arrowband position that second group of continuous Y subframe uses, N represents available arrowband number or all narrow Band number.When non-covered strengthens, different subframes send DCI not to be needed to repeat to transmit, and frequency domain position in each subframe is permissible Be determined according to coverage enhancement frequency pattern, also for continuous Y subframe use identical frequency domain or arrowband position, wherein for Non-covered strengthens transmission, and Y can be identical with Y value during coverage enhancement, or Y=1.

Alternatively, base station according to machine type communication MTC Physical Downlink Control Channel (M-PDCCH) or strengthens under physics The optional arrowband set of row control channel (EPDCCH) determines arrowband indicating mode with remaining arrowband set, wherein, with Arrowband identical position in M-PDCCH or EPDCCH place is as one of arrowband location status indicating.

Provide a kind of downlink control information sending method in step S102 to step S104, correspondingly, the present embodiment also carries Supply a kind of Downlink Control Information method of reseptance, during the Downlink Control Information sending for user equipment blind Detecting base station.

Fig. 3 is the schematic flow sheet of Downlink Control Information method of reseptance according to embodiments of the present invention, as shown in figure 3, this flow process Comprise the steps：

Step S302, UE determines DCI size or DCI during DCI transmission of blind Detecting according at least to one of following information The resource that format or DCI uses：Coverage enhancement grade, resource distribution instruction, scheduled type of message, search space collection Close；Wherein, same DCI size corresponding at least one DCI format；

Step S304, the resource blind Detecting that UE uses according to the DCI size that can use determining or DCI format or DCI The DCI that base station issues.

Alternatively, the resource that DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or under the physics of DCI scheduling The resource that row Traffic Channel PDSCH is used Discrete Distribution in time domain.

Alternatively, according to coverage enhancement grade, the determination mode of Discrete Distribution in time domain includes the resource that DCI uses：According to covering Lid strengthens iterative transfer times N that grade determines DCI, wherein, when repeating to transmit DCI, with M subframe for repeating to transmit Cycle, Y repetition transmission cycle of transmission, the number of sub frames repeating to be used in transmission cycle transmitting DCI is k；Wherein, N, M, Y is positive integer, and k ＜ M, k × Y=N.

Alternatively, user equipment determines the value of M according to the mode of one below：The configuration that predefined, base station issues.

Alternatively, user equipment determines the value of Y or k according to the mode of at least one of：Predefined, according under base station Send out configuration determine, base station issue one group of possible configuration and by user equipment according to blind Detecting result in the possible configuration of this group Middle determination, according to N value determine.

Alternatively, UE can use when determining and once transmit according at least to coverage enhancement grade DCI size or DCI format Including one below：UE determines that each different coverage enhancement grade uses different DCI size or DCI format, identical Coverage enhancement grade uses one or two DCI size or DCI format；UE determines that multiple different coverage enhancement grades make With one or two DCI size or DCI format, other coverage enhancement grades in addition to multiple different coverage enhancement grades Using another kind of or other two DCI size or DCI format；UE determines all different coverage enhancement grades only using one kind Or two kinds of DCI size or DCI format；Wherein, when the DCI size species using is two kinds, then every kind of size is only right Should a kind of DCI format；When the species of the DCI size using is a kind of, a kind of this DCI size corresponding at least one DCI format.

Alternatively, include successively from low to high in coverage enhancement grade：First coverage enhancement grade (being equivalent to above-mentioned CE1), In the case of two coverage enhancement grades (being equivalent to above-mentioned CE2), the 3rd coverage enhancement grade (being equivalent to above-mentioned CE3), UE Determine that each different coverage enhancement grade uses different DCI size or DCI format, identical coverage enhancement grade uses one Plant or two kinds of DCI size or DCI format include：

UE determines the first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade respectively using a DCI size Or DCI format, the 2nd DCI size or DCI format, the 3rd DCI size or DCI format；And

UE determines that non-covered strengthens (being equivalent to above-mentioned CE0) and uses the 4th DCI size or DCI format, wherein, first DCI size or DCI format includes one or two DCI size or DCI format, and/or, the 2nd DCI size or DCI Format includes one or two DCI size or DCI format, and/or, the 3rd DCI size or DCI format include one Kind or two kinds of DCI size or DCI format, and/or, the 4th DCI size includes one or two DCI size or DCI format.

Alternatively, include successively from low to high in coverage enhancement grade：First coverage enhancement grade, the second coverage enhancement grade, In the case of 3rd coverage enhancement grade, UE determine multiple different coverage enhancement grades use one or two DCI size or DCI format, other coverage enhancement grades in addition to multiple different coverage enhancement grades are using another kind of or other two DCI Size or DCI format includes one below：

UE determines that non-covered strengthens and uses one or two DCI size or DCI format, the first coverage enhancement grade, second Coverage enhancement grade and the 3rd coverage enhancement grade are using another kind of or other two DCI size or DCI format；

UE determine non-covered strengthen and the first coverage enhancement grade use one or two DCI size or DCI format, second Coverage enhancement grade and the 3rd coverage enhancement grade are using another kind of or other two DCI size or DCI format；

UE determines that non-covered strengthens, the first coverage enhancement grade and the second coverage enhancement grade use one or two DCI size Or DCI format, the 3rd coverage enhancement grade is using another kind of or other two DCI size or DCI format.

Alternatively, include successively from low to high in coverage enhancement grade：First coverage enhancement grade, the second coverage enhancement grade, In the case of 3rd coverage enhancement grade, UE determines all different coverage enhancement grades only using one or two DCI size Or DCI format includes one below：

UE determines non-covered enhancing, the first coverage enhancement grade, the second coverage enhancement grade and the 3rd coverage enhancement grade using same One or two DCI size or DCI format；Or

It is same or two kinds that UE determines that the first coverage enhancement grade, the second coverage enhancement grade and the 3rd coverage enhancement grade use DCI size or DCI format.

Alternatively, according at least to coverage enhancement grade, UE determines that DCI size or DCI format includes：UE determines and covers for non- Cover enhanced DCI and use one or two DCI size or DCI format, wherein, carry for the enhanced DCI's of non-covered Machine type communication (MTC) Physical Downlink Control Channel M-PDCCH or enhancing Physical Downlink Control Channel EPDCCH takes The transmission means of arrowband includes：Distributed transmission and/or localized transmission, at least include transmission means in corresponding search space The Candidate Set of maximum polymerization grade.

Alternatively, according at least to resource distribution instruction, UE determines that DCI size or DCI format includes one below：

UE determines that a DCI format and the 2nd DCI format uses a kind of DCI size, wherein, a DCI format Resource distribution instruction in do not indicate arrowband, in the resource distribution instruction of the 2nd DCI format indicate arrowband, a DCI format Including filling bit, filling bit is used for filling the first DCI format, so that a DCI format and the 2nd DCI format There is identical size；

UE determines that the 3rd DCI uses one or two DCI size or DCI format, wherein, is pre-configured with the 3rd by base station Whether arrowband is indicated in DCI；

UE determines that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, the 4th DCI format Resource distribution instruction bit field comprise not indicate that arrowband only indicates the 4th frequency domain instruction of resource allocation in arrowband and is used for indicating 4th time domain instruction of coverage enhancement iterative transfer times, the resource distribution instruction bit field of the 5th DCI format comprises to indicate narrow 5th frequency domain instruction of resource allocation and the 5th time domain instruction for indicating coverage enhancement iterative transfer times in band and arrowband, the The bit that four time domain instructions take is more than the bit that the 5th time domain instruction takies, the resource distribution instruction of the 4th DCI format Bit field has identical size with the resource distribution instruction bit field of the 5th DCI format.

Alternatively, according at least to resource distribution instruction, UE determines that DCI size or DCI format also includes one below：

UE determines that the 6th DCI format uses a kind of DCI size, wherein, by dispatched using the DCI of the 6th DCI format Type of message determines whether the 6th DCI format indicates resource allocation in arrowband or arrowband；

UE determines that the 7th DCI format uses a kind of DCI size, the 8th DCI to distribute indicating mode using for different resource Two kinds of DCI size or DCI format, wherein, the 7th DCI format is used for coverage enhancement, and the 8th DCI is used for non-covered and increases By force, determine whether the 7th DCI format indicates that arrowband or arrowband are domestic-investment by the corresponding coverage enhancement grade of the 7th DCI format Source is distributed；

UE determine the 9th DCI using support the 9th resource distribution instruction mode a kind of DCI size or DCI format, the tenth DCI, using another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, wherein, is gathered by search space Quantity determine it is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction mode；Number when search space set When measuring as 1, determination is to support the 9th resource distribution instruction mode or the tenth resource distribution instruction mode；When search space set Quantity when being 2, determine that the 9th resource distribution instruction mode is supported in first search space, second search space set is supported Tenth resource distribution instruction mode；

UE determines a kind of DCI size or DCI format using the 11st resource distribution instruction mode of support for the 11st DCI, the 12 DCI using another kind of DCI size or DCI format of the 12nd resource distribution instruction modes of support, wherein, by searching for It is to support the 11st resource distribution instruction mode or the 12nd resource distribution instruction mode that the type of spatial aggregation determines；Every kind of search One of only corresponding 11st DCI or the 12nd DCI of the type of rope spatial aggregation DCI.

Alternatively, according at least to type of message, UE determines that DCI size or DCI format includes one below：

In the case that the type of message of DCI scheduling is accidental access response RAR, UE determines that the 13rd DCI uses form 1C Or one of form 1A, the DCI size that the 14th DCI uses are the size of single user RAR message, wherein, the tenth Three DCI are the DCI using during using RAR scheduling mode, the 14th DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of DCI scheduling is RAR, UE determines that the 15th DCI uses two kinds of DCI size or DCI Format, the DCI size that the 16th DCI uses is the size of single user RAR message, wherein, is pre-configured with one kind by base station The transmission means of RAR message, transmission means includes RAR scheduling mode and RAR no scheduling mode, and the 15th DCI is to adopt The DCI using during RAR scheduling mode, the 16th DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of DCI scheduling is RAR, UE determines that the 17th DCI uses two kinds of DCI size or DCI Format, the DCI size that the 18th DCI uses are the size of single user RAR message, wherein, empty by resource location or search Between type determine be using RAR scheduling mode or adopt RAR no scheduling mode, the 17th DCI is using RAR dispatching party The DCI using during formula, the 18th DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of DCI scheduling is RAR, UE determines that the 19th DCI uses two kinds of DCI size or DCI Format, the 20th DCI use one of both DCI size or DCI format DCI size or DCI format, its In, the 19th DCI is the DCI using during using RAR scheduling mode, the 20th DCI be using RAR no scheduling mode when Single user RAR message；Wherein, two kinds of itself and the 19th DCI are made by reducing the bit number in single user RAR message The size of one of DCI size or DCI format DCI size or DCI format is identical, or, use RAR by increasing The bit number of one of two kinds of DCI size of scheduling mode or DCI format DCI size or DCI format is so that this kind of DCI Size or DCI format is identical with the size of the DCI size that the 20th DCI uses or DCI format.

Alternatively, UE includes according to the DCI that the DCI size that can use determining or DCI format blind Detecting base station issue One below：

In TDD system, UE carries out blind Detecting on continuous two special subframes or other subframes, to repeat Receive DCI；

When non-covered strengthens, when receiving described DCI in different subframes according to frequency pattern during coverage enhancement in different subframes Using different frequency domains or arrowband position.

Wherein, coverage enhancement repeat frequency pattern during transmission be continuous Y physical sub-frame or available subframe using identical frequency domain or Arrowband position, the frequency domain that different continuous Y subframes is used or arrowband position are different, carry out frequency hopping according to frequency pattern, such as A kind of possible frequency pattern is NB_Y2=(NB_Y1+ N/2) mod N, wherein NB_Y1Represent that first group of continuous Y subframe uses Arrowband position, NB_Y2Represent the arrowband position that second group of continuous Y subframe uses, N represents available arrowband number or all narrow Band number.When non-covered strengthens, different subframes send DCI not to be needed to repeat to transmit, and frequency domain position in each subframe is permissible Be determined according to coverage enhancement frequency pattern, also for continuous Y subframe use identical frequency domain or arrowband position, wherein for Non-covered strengthens transmission, and Y can be identical with Y value during coverage enhancement, or Y=1.

Alternatively, UE according to machine type communication (MTC) Physical Downlink Control Channel (M-PDCCH) or strengthens physics The optional arrowband set of down control channel (EPDCCH) determines arrowband indicating mode with remaining arrowband set, wherein, with Arrowband identical position in M-PDCCH or EPDCCH place is as one of arrowband location status indicating.

Through the above description of the embodiments, those skilled in the art can be understood that the side according to above-described embodiment Method can realize by the mode of software plus necessary general hardware platform naturally it is also possible to pass through hardware, but in many cases before Person is more preferably embodiment.Based on such understanding, technical scheme substantially makes tribute to prior art in other words That offers partly can be embodied in the form of software product, and this computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD) in, including some instructions with so that a station terminal equipment (can be mobile phone, computer, Server, or the network equipment etc.) method described in execution each embodiment of the present invention.

Additionally provide a kind of Downlink Control Information dispensing device in the present embodiment, be applied to base station, this device is used for realizing above-mentioned Downlink control information sending method and preferred implementation, had carried out repeating no more of explanation.As used below, art The software of predetermined function and/or the combination of hardware can be realized in language " module ".Although the device described by following examples is preferably To be realized with software, but hardware, or the realization of the combination of software and hardware is also may and to be contemplated.

Fig. 4 is the structured flowchart of Downlink Control Information dispensing device according to embodiments of the present invention, as shown in figure 4, this device bag Include：Determining module 42 and sending module 44, wherein it is determined that module 42, for determining once according at least to one of following information The resource that the DCI size that can use during DCI transmission or DCI format or DCI uses：Coverage enhancement grade (CE), money Source distribution instruction (RA), scheduled type of message, search space set；Wherein, same DCI size is corresponding at least one DCI format；Sending module 44, coupled to determining module 42, for being corresponded to a kind of DCI size that can use determining DCI format send DCI, or base station is with a kind of DCI format transmission DCI of using of determining.

In the present embodiment, determining module 42 one or more sides according to described in downlink control information sending method embodiment Formula determines the DCI size or DCI format that can use during a DCI transmission, and here will not be described in great detail.

Additionally provide a kind of Downlink Control Information reception device in the present embodiment, be applied to user equipment (UE).This device is used for real Existing above-mentioned Downlink Control Information method of reseptance and its preferred implementation.

Fig. 5 is the structural representation of Downlink Control Information reception device according to embodiments of the present invention, as shown in figure 5, this device Including：Determining module 52 and receiver module 54, wherein it is determined that module 52, blind for determining according at least to one of following information The resource that DCI size during DCI transmission of detection or DCI format or DCI uses：Coverage enhancement grade (CE), money Source distribution instruction (RA), scheduled type of message, search space set；Wherein, same DCI size is corresponding at least one DCI format；Receiver module 54, coupled to determining module 52, for according to DCI size or DCI that can use determining The DCI that the resource blind Detecting base station that format or DCI uses issues.

In the present embodiment, determining module 52 one or more sides according to described in Downlink Control Information method of reseptance embodiment Formula determines the DCI size or DCI format that can use during a DCI transmission, and here will not be described in great detail.

It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, can by with Under type is realized, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned module is located at multiple places respectively In reason device.

Embodiments of the invention additionally provide a kind of software, and this software is used for executing described in above-described embodiment and preferred implementation Technical scheme.

Embodiments of the invention additionally provide a kind of storage medium.In the present embodiment, above-mentioned storage medium can be configured so that and deposits Store up the program code for executing following steps：

Step S102, base station determines DCI size or DCI that can use during a DCI transmission according at least to one of following information The resource that format or DCI uses：Coverage enhancement grade, resource distribution instruction, scheduled type of message, search space collection Close；Wherein, same DCI size corresponding at least one DCI format；

Step S104, base station sends DCI with the corresponding DCI format of a kind of DCI size that can use determining, or base Stand and DCI is sent with a kind of DCI format that can use determining.

Embodiments of the invention additionally provide a kind of storage medium.In the present embodiment, above-mentioned storage medium can be configured so that and deposits Store up the program code for executing following steps：

Step S302, UE determines DCI size or DCI during DCI transmission of blind Detecting according at least to one of following information The resource that format or DCI uses：Coverage enhancement grade, resource distribution instruction, scheduled type of message, search space collection Close；Wherein, same DCI size corresponding at least one DCI format；

Step S304, the resource blind Detecting that UE uses according to the DCI size that can use determining or DCI format or DCI The DCI that base station issues.

Alternatively, in the embodiment of the present invention, above-mentioned storage medium can include but is not limited to：USB flash disk, read only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.

Alternatively, the specific example in the present embodiment may be referred to the example described in above-described embodiment and optional embodiment, The present embodiment will not be described here.

In order that the description of the embodiment of the present invention is clearer, it is described with reference to preferred embodiment and illustrates.

It is high in order to solve the problems, such as low cost and coverage enhancement MTC terminal reception detection Downlink Control Information (DCI) complexity, The preferred embodiment of the present invention proposes a kind of determination method of Downlink Control Information, can reduce answering of blind Detecting Downlink Control Information Miscellaneous degree.

The determination method of the Downlink Control Information that the preferred embodiment of the present invention provides, including：Base station is according at least one following information The resource that the DCI size of the DCI being used when determining that terminal is once transmitted or DCI format or DCI uses：Covering grade, Resource distribution instruction, type of message, search space set, wherein, same DCI size corresponding at least one DCI format.

Wherein, covering grade is preferably divided into 3 grades, respectively covering grade 1 (CE1), covering grade 2 (CE2), covering etc. Level 3 (CE3), the optional covering grade 0 (CE0) that also includes represents that non-covered strengthens；Resource distribution instruction comprises this DCI and is adjusted The running time-frequency resource of degree information takies instruction；Type of message includes：RAR、Paging、RRC、TPC；Search space set includes Collective number, search space aggregate type.

Alternatively, according at least to covering grade determine the DCI size that once transmits or DCI format at least include following at least it One：Each polymerization grade uses different DCI size, every kind of grade respectively using 1 or 2 kind of size DCI；CE0 with Other covering grades use different DCI size or DCI format；CE0, ce1 and ce2, CE3 use different DCI size Or DCI format；CE0, CE1, CE2 use different DCI size or DCI format from CE3.

For example, determine that the DCI size once transmitting or DCI format at least includes at least one of according at least to covering grade： CE0, CE1, CE2, CE3 use different DCI size or DCI format, and every kind of grade is respectively using 1 or 2 kind The DCI size or DCI of DCI format；CE0 uses different DCI size or DCI format from CE1, CE2, CE3, Preferably CE0 uses 2 kinds of DCI size or DCI format, coverage enhancement different brackets all using a kind of DCI size simplifying or DCI format；CE0, ce1 and ce2, CE3 use different DCI size or DCI format, wherein CE0 and CE1 Using identical 1 or 2 kind of DCI size or DCI format DCI, CE2 and CE3 using a kind of DCI size simplifying or DCI format；CE0, CE1, CE2 and CE3 use different DCI size or DCI format, wherein CE0, CE1 with CE2 uses the DCI of identical 1 or 2 kind of DCI size or DCI format, and CE3 is using a kind of DCI size or DCI simplifying format.

DCI size or DCI format and search space position are determined according to cover grade, a kind of (preferably according to CE0 or CE1) For determining 1 or 2 kind of DCI size or DCI format DCI, and only one of which search space position.Another kind of (preferably root According to CE2 or CE3) for determining different search space positions, each search space position is using a kind of DCI size or DCI simplifying Format, in different search spaces, DCI size or DCI format can be identical or different.The a kind of DCI size wherein simplifying Or each bit domain analysis of DCI format are as follows：

Resource allocation (Resource Allocation, referred to as RA) domain：Regardless of whether there being arrowband to indicate, instruction in arrowband only needs 0-2bit；

Number of repetition instructions field：This bit domain size, between 1-3bit, indicates one of possible number of repetition set, may Number of repetition set (a set of values) configured by high-level signaling, in set, quantity is between 1-8；

Modulation and coding strategy (Modulation and Coding Scheme, referred to as MCS) domain：Consider to simplify DCI format Require, it is possible to reduce support several or even only support a kind of, bit domain size is 0-4bit；

HARQ process：0-1bit can be reduced to；

Form 0/1A labelling (Flag for format 0/1A)：Take 1bit, only using a uplink authorization (UL grant) and one During individual downstream grants (DL grant) and both size are different, then can remove this bit domain.If both size are identical, still Retain this bit domain.

Circuit switching (Circuit Switch, the referred to as CS) domain of up (UL)：This bit domain can be reduced to 0-2bit or Still maintain 3bit.

Upper line index (UL index)/DAI domain：For time division duplex (TDD) uplink-downlink configuration 0 or 1-6, repeating to transmit When do not need to UL index or DAI instruction.

During coverage enhancement, uplink power control is optional not to be supported, is sent with peak power.

Hybrid automatic repeat-request-the skew of confirmation resource response (HARQ-ACK Resource Offset, letter during coverage enhancement scene Referred to as HARQ-ARO) 2bit instruction PUCCH resource value determine ARO parameter.The 2bit of this instruction ARO can omit, I.e. ARO=0 during coverage enhancement, and other low costs or traditional (legacy) UE use 3 values of other ARO.

It is based respectively on DCI size or each bit of DCI format that format 0 and 1A considers to simplify below taking table 3～table 4 as a example Domain.

Table 3DCI Format 0

Table 4DCI Format 1A

Below, consider DCI size or each bit domain of DCI format simplified based on format 1C taking table 5 as a example.

Table 5DCI Format 1C

Based on above-mentioned analysis, DCI format X size (for example, the unified UL/DL grant, or only DL simplifying the most Grant, or only UL grant) as shown in table 6：

Table 6DCI format X size

Alternatively, according at least to resource distribution instruction determine the DCI size that once transmits or DCI format at least include with down to One of few：Using a kind of DCI size or DCI format, wherein do not indicate that the DCI format of arrowband increases padding bit and finger Show that the DCI of arrowband keeps identical size；Using a kind or 2 kinds of DCI size or DCI format, configured by eNB and whether indicate Arrowband；Indicate during using a kind of DCI size or DCI format, wherein coverage enhancement that running time-frequency resource ensures identical DCI size simultaneously Or DCI format, wherein resource allocation (RA) indication bit domain comprises number of repetition and frequency domain instruction simultaneously, does not indicate arrowband RA in comprise the instruction of multiple numbers of repetition, comprise a small amount of number of repetition instruction, two kinds of situation RA size in the RA of instruction arrowband Identical；

Preferably, according at least to resource distribution instruction determine the DCI size that once transmits or DCI format at least include with down to One of few：Using a kind of DCI size or DCI format, wherein do not indicate that the DCI format of arrowband increases padding bit and finger Show that the DCI of arrowband keeps identical size, now both RA domains are of different sizes, do not indicate that in the DCI format of arrowband, RA domain is relatively Little, in the DCI format of instruction arrowband, RA domain is larger, by increasing padding bit to the DCI format not indicating arrowband, makes With instruction arrowband DCI format size identical；Using a kind or 2 kinds of DCI size or DCI format, configured by eNB Whether indicate arrowband, now by SIB, eNB can broadcast whether whole cell indicates arrowband, or configures by RRC signaling Whether the DCI of schedule unicast business indicates arrowband；Using during a kind of DCI size or DCI format, wherein coverage enhancement simultaneously Instruction running time-frequency resource ensures identical DCI size or DCI format, and wherein resource allocation (RA) indication bit domain comprises weight simultaneously Again number and frequency domain instruction, comprise multiple number of repetition instructions, comprise a small amount of in the RA of instruction arrowband in the RA not indicating arrowband Number of repetition indicates, two kinds of situation RA size are identical (to be comprised the instruction of 5bit number of repetition as do not indicated in the RA of arrowband, indicate The number of repetition of the arrowband instruction and 2bit that comprise 3bit in the RA of arrowband indicates), corresponding two kinds of different DCI format, then by 1bit mark makes a distinction.

Alternatively, determine, according at least to resource distribution instruction, the DCI size or DCI format once transmitting, also include according to other Information consolidation determines, joint determination mode at least includes at least one of：Arrowband or narrow is determined whether according to type of message Resource allocation in band, only supports to use a kind of DCI size or DCI format；Arrowband is determined whether according to coverage enhancement grade Or resource allocation in arrowband, the DCI of two kinds of size of wherein CE0 support different resource distribution indicating mode；According to search space Collective number determines that the DCI of two kinds of size supporting different resource to distribute indicating mode, wherein each set only support one of which DCI size or DCI format；Determine that support different resource distributes two kinds of size's of indicating mode according to search space aggregate type DCI, wherein each type search space only support one of which DCI size or DCI format.

Alternatively, determine, according at least to resource distribution instruction, the DCI size or DCI format once transmitting, also include according to other Information consolidation determines, joint determination mode at least includes at least one of：Arrowband or narrow is determined whether according to type of message Resource allocation in band, only supports to use a kind of DCI size or DCI format, such as RAR message, comprises to indicate narrow simultaneously Resource allocation in band and arrowband, only supports to use a kind of DCI size or DCI format, such as Paging message, does not use Instruction arrowband, using resource allocation in arrowband, only supports to use a kind of DCI size or DCI format；According to coverage enhancement grade Determine whether resource allocation in arrowband or arrowband, wherein CE0 supports that different resource distributes the DCI of two kinds of size of indicating mode, CE1 is preferably identical with CE0 situation, with CE3, CE2 does not indicate that in arrowband and arrowband, resource allocation corresponding bit number is again smaller than CE0 In arrowband in resource allocation bit number, and CE2 and CE3 only support a kind of DCI size or DCI format；According to search Spatial aggregation quantity determines the DCI of two kinds of size supporting different resource to distribute indicating mode, wherein each search space set (set) Only support that one of which DCI size or DCI format, such as set 0 support a kind of size of resource allocation in arrowband instruction and arrowband DCI format, set 1 support compared with coarse-grain arrowband in resource allocation and do not indicate arrowband a kind of size DCI format； Determine the DCI of two kinds of size supporting different resource to distribute indicating mode according to search space aggregate type, wherein each type is searched One of which DCI size or DCI format is only supported in rope space, only supports instruction arrowband and do not support to refer in arrowband in such as CSS The DCI format of a kind of size showing, supports the DCI format of arrowband instruction and a kind of size of instruction in arrowband in USS.

During for only there is 1 set in search space：Shown in preferred search space Candidate Set table 7 and table 8：

Table 7EPDCCH Candidate Set (One Distributed EPDCCH-PRB-set)

Table 8EPDCCH Candidate Set (One Localized EPDCCH-PRB-set)

If centralized consideration AL=24, centralized search space Candidate Set is as shown in table 9：

Table 9EPDCCH Candidate Set (One Localized EPDCCH-PRB-set)

Additionally, when search space has 2 set (set)：Preferably search space Candidate Set is as shown in table 10～table 14：

Table 10EPDCCH Candidate Set (Two Distributed EPDCCH-PRB-set)

Table 11EPDCCH Candidate Set (Two Localized EPDCCH-PRB-set)

If centralized introducing AL=24, search space Candidate Set is as shown in table 12：

Table 12EPDCCH Candidate Set (Two Localized EPDCCH-PRB-set)

Table 13EPDCCH Candidate Set (One Localized EPDCCH-PRB-set and One Distributed EPDCCH-PRB-set)

Wherein, p₁Represent the localized EPDCCH-PRB-set, p₂Represent the distributed EPDCCH-PRB-set.

Consider that localized transmission introduces AL=24, then search space Candidate Set is as shown in table 14：

Table 14EPDCCH Candidate Set (One Localized EPDCCH-PRB-set and One Distributed EPDCCH-PRB-set)

Wherein, p₁Represent the localized EPDCCH-PRB-set, p₂Represent the distributed EPDCCH-PRB-set.

Alternatively, when type of message is RAR, determine the side of DCI size corresponding to RAR message or DCI format species Method includes at least one of：Using 2 kinds of DCI size or DCI format, limit during scheduling RAR only using Format 1C 1 kind therein with 1A, another kind of DCI size or DCI format is the size of RAR message corresponding to single UE；Pass through ENB instruction is implicit to determine DCI size or DCI format species, using RAR scheduling mode or no scheduling mode, wherein uses Using 2 kinds of DCI size or DCI format during RAR scheduling mode, using right using a kind of single UE institute during no scheduling mode Answer the DCI size or DCI format of RAR message；By distinguishing resource location or search space type transfers list RAR and tune Spend the DCI of many RAR；By the bit number of the single RAR of reduction to the size equal with Format 1A；By increasing Format 1A To the size equal with single RAR.

Alternatively, when type of message is RAR, determine the side of DCI size corresponding to RAR message or DCI format species Method includes at least one of：Using 2 kinds of DCI size or DCI format, limit during scheduling RAR only using Format 1C 1 kind therein with 1A, another kind of DCI size or DCI format is the size of RAR message corresponding to single UE；Pass through ENB instruction is implicit to determine DCI size or DCI format species, that is, eNB notify/configure RAR message transmission means and then Implicit determination DCI size or DCI format species, it is to use scheduling mode that eNB notifies/configure the transmission means of RAR message Or no scheduling mode, wherein using during RAR scheduling mode using 2 kinds of DCI size or DCI format, using no scheduling mode When using RAR message corresponding to a kind of single UE DCI size or DCI format；Empty by distinguishing resource location or search Between the type transfers list RAR and DCI dispatching many RAR, search between the timesharing of space time zone in same type, frequency domain resource, now pass Defeated single RAR is located at different resource region with the DCI dispatching many RAR, and the single RAR of transmission uses corresponding to a kind of single UE The DCI size of RAR message or DCI format, the DCI dispatching many RAR uses 2 kinds of size, such as, shown in Fig. 6, rising In the continuous N1 subframe time unit in beginning position 1, the single RAR of transmission is located in arrowband 1, and the DCI of the many RAR of scheduling is located at In arrowband 3, or the single RAR of transmission is located at arrowband 1 and in the continuous N1 subframe time unit of original position 1, and scheduling is many The DCI of RAR also is located at arrowband 1 and in the continuous N2 subframe time unit of original position 2；In dissimilar search space Middle transmission, such as positioned at dissimilar search space CSS and dedicated SS, wherein transmits single RAR and is located at dedicated SS Using the DCI size or DCI format of RAR message corresponding to a kind of single UE, the DCI dispatching many RAR is located at CSS In and use 2 kinds of size；When receiving at the same time, only receive RAR, do not receive other unicasts and broadcast；Single by reduction The bit number of RAR to the size equal with Format 1A, will carry out letter in the bit domain in the corresponding RAR message of unique user Change, be allowed to equal with the size of Format 1A as carried out simplifying to bit field such as UL grant；By increase Format 1A to The equal size of single RAR, will be allowed to and list RAR in the bit domain such as format 1A increase such as number of repetition instruction, arrowband instruction Size equal.

Alternatively, DCI, when repeating transmission, is used in mixed way the mode of the ECCE comprising different EREG quantity in different subframes Including：When using different polymerization grade and all taking 6PRB, it is mixed that support is used in mixed way AL=24 with AL=12；Non- take During 6PRB, using same polymeric grade, alternatively, support AL=1,2,4,8.

Alternatively, DCI, when repeating transmission, is used in mixed way the mode of the ECCE comprising different EREG quantity in different subframes Including：When using different polymerization grade and all taking 6PRB, it is mixed, that is, now that support is used in mixed way AL=24 with AL=12 DCI all takes 6PRB in each subframe repeating to transmit, such as in a tdd system and using general cyclic prefix (normal CP) When generic downlink subframe in using AL=24ECCE and each ECCE comprises 4 EREG, DwPTS in special subframe Using AL=12ECCE and each ECCE comprises 8 EREG；Non- when taking 6PRB, using same polymeric grade, optional Ground, supports AL=1,2,4,8, and now DCI, all using identical polymerization grade in each subframe repeating to transmit, such as exists In TDD system and using normal CP when generic downlink subframe in using AL=4ECCE take 1 PRB resource and each ECCE comprises 4 EREG, and in special subframe, DwPTS uses AL=4ECCE to take 2 PRB resources and each ECCE Comprise 8 EREG；For AL=16 it is impossible to support to be used in mixed way, in different subframes, the ECCE comprising different EREG quantity；

Alternatively, when DCI repeats transmission in a tdd system, continuous two special subframes are merged and uses, remaining subframe is independent Use.

Alternatively, when DCI repeats transmission in a tdd system, continuous two special subframes are merged and uses, remaining subframe is independent Use, that is, repeat generic downlink subframe during transmission and repeat resource as a, will continuous two special subframes merging be used rear as A repetition resource, in repeating transmission, using identical polymerization grade, is used in mixed way in different subframes and comprises different EREG The ECCE of quantity, takies the PRB resource not waited.

Alternatively, a kind of possible dynamic arrowband indicating means in resource allocation indicating method, using the optional arrowband of M-PDCCH Set determines arrowband indicating mode jointly with remaining arrowband set.Wherein identical with M-PDCCH place arrowband narrow as instruction One of band location status.

Alternatively, a kind of possible dynamic arrowband indicating means in resource allocation indicating method, using the optional arrowband of M-PDCCH Set determines arrowband indicating mode jointly with remaining arrowband set.Wherein identical with M-PDCCH place arrowband narrow as instruction One of band location status.In resource allocation indicating method, a kind of possible dynamic arrowband indicating means, optional using M-PDCCH Arrowband set determines arrowband indicating mode jointly with remaining arrowband set.Wherein identical with M-PDCCH place arrowband conduct instruction One of arrowband location status.Preferably as shown in Figure 7：M-PDCCH has X, and (such as X=4, in arrowband 1,2,3,4 Middle selection arrowband 3) arrowband is optional, and PDSCH has extra Y (such as Y=3, respectively arrowband 5,6,7) individual arrowband optional, Now Z (as Z=2) bit indicates that Y PDSCH possible position and 1 arrowband identical with M-PDCCH (now exist 1 is selected) in arrowband 3,5,6,7.Benefit is M-PDCCH arrowband is to select 1 in X in itself, so and M-PDCCH Identical arrowband actually saves some arrowbands instruction expense, is chosen as saving the expense of the arrowband that instruction control channel is not selected.

By using Downlink Control Information proposed by the invention determination method it is ensured that maintain or reduce reception bandwidth limited by And/or the MTC terminal limited by covering needs in blind Detecting down control channel to detect the quantity of DCI size or DCI format, Realize maintaining or reduce blind check complexity, reach the effect controlling MTC terminal power consumption.

Below by example, the preferred embodiment of the present invention is described and illustrates.

Preferred embodiment 1

The present embodiment is described explanation to Downlink Control Information determination using method provided by the present invention.

The size species of the DCI that base station is used when determining that terminal is once transmitted according to covering grade, resource distribution instruction.Wherein Covering grade is preferably divided into 3 grades, respectively covering grade 1 (CE1), covering grade 2 (CE2), covering grade 3 (CE3), The optional covering grade 0 (CE0) that also includes represents that non-covered strengthens；Resource distribution instruction comprises the time-frequency of information scheduled in this DCI Resource occupation indicates；

Determine that CE0 uses different DCI size or DCI format from other covering grades according to covering grade；Wherein CE0 makes With existing DCI format and revise wherein RA domain, such as format 0/1A, format 1C, wherein resource distribution instruction domain comprises Resource distribution instruction in arrowband instruction and arrowband, that is, CE0 is using 2 kinds of DCI size or DCI format.

For CE1,2,3, coverage enhancement different brackets is all using a kind of DCI size simplifying or DCI format.Wherein simplify Each bit domain of a kind of DCI format X and size be defined below：

RA domain：Do not indicate arrowband, instruction in arrowband needs 2bit, instruction using corresponding Traffic Channel take 0-2PRB, 3-5PRB, 0-5PRB.

Number of repetition instructions field：This bit domain is 2bit, one of instruction number of repetition set, number of repetition set (a set of Values) configured by high-level signaling, in set, quantity is 4 kinds of numbers of repetition.

MCS domain：In view of compact it may be considered that minimizing support is several, bit number is 4bit.As shown in Table 15.

The modulation (Modulation) of table 15PDCCH and transmission block (TBS) concordance list

HARQ process：1bit can be reduced to, support most 2 processes.

New data indicates (New data indicator)：1bit.

Flag for format 0/1A(1bit)：Only using during an a UL grant and DL grant and both size are different, then This bit domain can be removed.If both size are identical, still retain the bit field of this 1bit.

The DCI format X size (unified UL/DL grant) that this is simplified is as shown in table 16：

Table 16DCI format X size

Whether base station will have coverage enhancement demand according to terminal, be transmitted using corresponding DCI format, strengthen in non-covered When using existing DCI format, the DCI of terminal different size of 2 kinds of detection at most in once transmitting, make in coverage enhancement With DCI format X, the DCI of terminal a kind of size of detection in once transmitting.

By using Downlink Control Information proposed by the invention determination method it is ensured that maintain reception bandwidth limited by MTC Terminal needs in blind Detecting down control channel to detect the quantity of DCI size or DCI format, reduces and covers limited MTC Terminal needs in blind Detecting down control channel to detect the quantity of DCI size or DCI format, realizes maintaining or reduces blind check Complexity, reaches the effect controlling MTC terminal power consumption.

Preferred embodiment 2

The present embodiment is described explanation to Downlink Control Information determination using method provided by the present invention.

Base station determines support different resource to distribute indicating mode two kinds according to resource distribution instruction and search space collective number The DCI of size, wherein each set only support one of which DCI size or DCI format.

Base station configures the search space of two set, supports the DCI of a kind of size of resource allocation in arrowband instruction and arrowband in set 0 Form, set 1 support compared with coarse-grain arrowband in resource allocation and do not indicate arrowband a kind of size DCI format.

When wherein set 0 supports resource allocation in arrowband instruction and arrowband, arrowband instruction needs 2bit, and 4 of this 2bit instruction narrow Band position is respectively other 3 arrowband not available with control channel arrowband identical arrowband and control channel position.Arrowband Interior resource allocation uses 5bit, represents the continuous resource distribution of arbitrarily PRB number in arrowband.Set 1 supports compared with coarse-grain Arrowband in resource allocation and when not indicating arrowband, now scheduled Traffic Channel using with control channel identical arrowband or The arrowband known, in arrowband, resource distribution instruction needs 2bit, instruction using corresponding Traffic Channel take 0-2PRB, 3-5PRB, 0-5PRB.Now the DCI size in set1 or DCI format is less than the DCI size in set 0 or DCI format.

Terminal, when blind Detecting receives down control channel, only detects the DCI format of a kind of size in the search space of each set.

Determination method by using Downlink Control Information proposed by the invention covers limited MTC terminal it is ensured that reducing Need in blind Detecting down control channel to detect the quantity of DCI size or DCI format, realize reducing blind check complexity, with When the DCI size that detected or DCI format both ensure that certain motility in resource distribution instruction, also achieve minimizing Control overhead, reaches the effect controlling MTC terminal power consumption.

Preferred embodiment 3

The present embodiment is described explanation to Downlink Control Information determination using method provided by the present invention.

When type of message is RAR, base station determines that DCI size corresponding to RAR message or DCI format species are 2 kinds.

High-level signaling is passed through (as Master Information Block (Master Information Block, referred to as MIB) or system letter in base station first Breath block (System Information Block, referred to as SIB)) notify/configuration RAR message transmission means, wherein RAR The transmission means of message has two kinds, and one kind is no scheduling mode, and that is, RAR message body size is only the RAR message of unique user； Another kind of is scheduling mode, and that is, RAR message body size comprises the RAR message of one or more users, this RAR message body by Control channel scheduled transmission.

From the beginning of moment t1, it is scheduling mode that base station notifies the transmission means of RAR message, now using 2 kinds of DCI size or DCI format, terminal needs 2 kinds of size of blind Detecting in corresponding search space when detecting the schedule information of RAR message body DCI.Terminal is implied by the transmission means that eNB indicated/configured RAR message and determines DCI size or DCI format species, I.e. by eNB indicate/configure RAR message transmission means be scheduling mode so that determine now need 2 kinds of DCI size of blind Detecting Or DCI format.

Through after a period of time, from the beginning of moment t2, it is non-scheduled mode that base station notifies the transmission means of RAR message, now makes With a kind of DCI size or DCI format, the DCI of RAR message size corresponding to as single UE.Terminal is in detection RAR The DCI of a kind of size of blind Detecting in corresponding search space is needed during message.Terminal indicates/configures RAR message by eNB Transmission means imply and determine DCI size or DCI format species, indicated/configured the transmission means of RAR message by eNB For no scheduling mode so that determine now need blind Detecting a kind of DCI size or DCI format.

Determination method by using Downlink Control Information proposed by the invention covers limited MTC terminal it is ensured that reducing Need during Downlink Control Information corresponding in blind Detecting RAR message to detect the quantity of DCI size or DCI format, realize subtracting Few blind check complexity, reaches the effect controlling MTC terminal power consumption.

Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general calculating Realizing, they can concentrate on single computing device device, or is distributed on the network that multiple computing devices are formed, Alternatively, they can be realized with the executable program code of computing device, it is thus possible to be stored in storage device In to be executed by computing device, and in some cases, can be with the step shown or described different from order execution herein Suddenly, or by them it is fabricated to each integrated circuit modules respectively, or the multiple modules in them or step are fabricated to single Integrated circuit modules are realizing.So, 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 those skilled in the art For, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made, etc. With replacing, improving etc., should be included within the scope of the present invention.

Claims (35)

1. a kind of downlink control information sending method is it is characterised in that include：

Base station determines the DCI that can use during a Downlink Control Information DCI transmission according at least to one of following information The resource that size size or DCI format format or DCI use：Coverage enhancement grade CE, resource distribution instruction RA, scheduled type of message, search space set；Wherein, same DCI size corresponding at least one DCI format；

Described base station sends described DCI with the corresponding DCI format of a kind of DCI size that can use determining, or Base station described in person sends described DCI with a kind of DCI format that can use determining.

2. method according to claim 1 it is characterised in that

The resource that described DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or

The resource that physical down Traffic Channel PDSCH of described DCI scheduling is used Discrete Distribution in time domain.

3. method according to claim 2 is it is characterised in that the resource of described DCI use is according to coverage enhancement grade In time domain, the determination mode of Discrete Distribution includes：

Determine iterative transfer times N of described DCI according to coverage enhancement grade, wherein, repeating to transmit described DCI When, with M subframe for repeating transmission cycle, transmission Y described repetition transmission cycle, described repeats transmission week The interim number of sub frames for transmitting described DCI is k；

Wherein, N, M, Y are positive integer, and k ＜ M, k × Y=N.

4. method according to claim 3 is it is characterised in that user equipment determines M according to the mode of one below Value：

The configuration that predefined, base station issues.

5. method according to claim 3 is it is characterised in that user equipment determines according to the mode of at least one of The value of Y or k：

Predefine, determined according to the configuration that base station issues, base station issues one group of possible configuration and is set by described user Standby is determined in the possible configuration of this group according to blind Detecting result, according to the determination of N value.

6. method according to claim 1 is it is characterised in that described base station is true according at least to described coverage enhancement grade During fixed once transmission, the described DCI size that can use or DCI format includes one below：

Described base station determines that each different coverage enhancement grade uses different DCI size or DCI format, phase Same coverage enhancement grade uses one or two DCI size or DCI format；

Described base station determines that multiple different coverage enhancement grades use one or two DCI size or DCI Format, other coverage enhancement grades in addition to the plurality of different coverage enhancement grade are using another kind of or another Two kinds of DCI size or DCI format；

Described base station determines all different coverage enhancement grades only using one or two DCI size or DCI format；

Wherein, when the DCI size species using is two kinds, then every kind of size only corresponds to a kind of DCI format； When the species of the DCI size using is a kind of, a kind of this DCI size corresponding at least one DCI format.

7. method according to claim 6 it is characterised in that

In the case of one below, a kind of mixed transport is supported by DCI format scheduling indicating downlink Traffic Channel Pattern：Respectively using a kind of DCI format, every kind of coverage enhancement grade and non-covered increase every kind of coverage enhancement grade Respectively using a kind of DCI format, one or more different coverage enhancement grades use a kind of DCI to strong grade Format, one or more different coverage enhancement grades and non-covered strengthen grade respectively using a kind of DCI Format, all coverage enhancement grades use a kind of DCI format, all coverage enhancement grades and non-covered to strengthen Grade uses a kind of DCI format；

In the case of one below, supported different by different DCI format scheduling indicating downlink Traffic Channels Mixed transmission modes：Every kind of coverage enhancement grade respectively using two kinds of DCI format, every kind of coverage enhancement grade and Non-covered strengthens grade respectively using two kinds of DCI format, and one or more different coverage enhancement grades use two Plant DCI format, one or more different coverage enhancement grades and non-covered strengthen grade respectively using two kinds of DCI Format, all coverage enhancement grades use two kinds of DCI format, all coverage enhancement grades and non-covered to strengthen Grade uses two kinds of DCI format；

Wherein, described mixed transmission modes refer to reference for demodulation signal DMRS type and/or port needs Instruction.

8. method according to claim 7 is it is characterised in that described mixed transmission modes are entered by the bit domain in DCI One of following mode of going indicates：

Instruction non-multicast/multicast single-frequency network network MBSFN sub-frame is also based on DMRS transmission based on CRS transmission mode Pattern；

Indicate that all subframes are also based on DMRS two-port transmission mode based on the single-ended port transmission of DMRS.

9. method according to claim 6 is it is characterised in that include successively from low to high in described coverage enhancement grade： In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described base station is true Each different coverage enhancement grade fixed uses different DCI size or DCI format, identical coverage enhancement etc. Level is included using one or two DCI size or DCI format：

Described base station determines described first coverage enhancement grade, described second coverage enhancement grade, described 3rd covering Strengthen grade respectively using a DCI size or DCI format, the 2nd DCI size or DCI format, the 3rd DCI Size or DCI format；

Described base station determines that non-covered strengthens and uses the 4th DCI size or DCI format, wherein, a described DCI Size or DCI format includes one or two DCI size or DCI format, and/or, described 2nd DCI size Or DCI format includes one or two DCI size or DCI format, and/or, described 3rd DCI size Or DCI format includes one or two DCI size or DCI format, and/or, described 4th DCI size DCI size or DCI format including one or two.

10. method according to claim 6 is it is characterised in that include successively from low to high in described coverage enhancement grade： In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described base station is true Fixed multiple different coverage enhancement grades use one or two DCI size or DCI format, except the plurality of Other coverage enhancement grades outside different coverage enhancement grades using another kind of or other two DCI size or DCI format includes one below：

Described base station determines that non-covered strengthens and uses one or two DCI size or DCI format, described first Coverage enhancement grade, described second coverage enhancement grade and described 3rd coverage enhancement grade use another kind of or another two The DCI size planting or DCI format；

Described base station determines that non-covered strengthens and described first coverage enhancement grade uses one or two DCI size Or DCI format, described second coverage enhancement grade and described 3rd coverage enhancement grade use another kind of or another two The DCI size planting or DCI format；

Described base station determines that non-covered strengthens, described first coverage enhancement grade and described second coverage enhancement grade make With one or two DCI size or DCI format, described 3rd coverage enhancement grade uses another kind of or another two The DCI size planting or DCI format.

11. methods according to claim 6 are it is characterised in that include successively from low to high in described coverage enhancement grade： In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described base station is true Fixed all different coverage enhancement grades are only included using one or two DCI size or DCI format with purgation One：

Described base station determine non-covered enhancing, described first coverage enhancement grade, described second coverage enhancement grade and Described 3rd coverage enhancement grade uses same or two kinds DCI size or DCI format；

Described base station determines described first coverage enhancement grade, described second coverage enhancement grade and described 3rd covering Strengthen grade and use same or two kinds DCI size or DCI format.

12. methods according to claim 6 are it is characterised in that described base station is true according at least to described coverage enhancement grade Fixed described DCI size or DCI format includes：

Described base station determines for the enhanced DCI of non-covered using one or two DCI size or DCI format, its In, carry the machine type communication MTC Physical Downlink Control Channel M-PDCCH for the enhanced DCI of non-covered Or strengthen Physical Downlink Control Channel EPDCCH and take the transmission means of arrowband and include：Distributed transmission and/or collection Chinese style is transmitted, and at least includes the Candidate Set of the maximum polymerization grade of described transmission means in corresponding search space.

13. methods according to claim 1 are it is characterised in that described base station is true according at least to described resource distribution instruction Fixed described DCI size or DCI format includes one below：

Described base station determines that a DCI format and the 2nd DCI format uses a kind of DCI size, wherein, described Arrowband is not indicated, the resource allocation of described 2nd DCI format refers in the resource distribution instruction of the first DCI format Show middle instruction arrowband, a described DCI format includes filling bit, described filling bit is used for filling described One DCI format, so that a described DCI format and described 2nd DCI format has identical DCI size；

Described base station determines that the 3rd DCI uses one or two DCI size or DCI format, wherein, pre- by base station First configure in described 3rd DCI and whether indicate arrowband；

Described base station determines that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, described The resource distribution instruction bit field of the 4th DCI format comprises not indicate arrowband and only indicates resource allocation in arrowband 4th frequency domain instruction and the 4th time domain instruction for indicating coverage enhancement iterative transfer times, described 5th DCI The resource distribution instruction bit field of format comprise to indicate resource allocation in arrowband and arrowband the 5th frequency domain instruction and For indicating the 5th time domain instruction of coverage enhancement iterative transfer times, the bit that described 4th time domain instruction takies The bit taking more than described 5th time domain instruction, the resource distribution instruction bit field of described 4th DCI format With the resource distribution instruction bit field of described 5th DCI format, there is identical size.

14. methods according to claim 1 are it is characterised in that described base station is true according at least to described resource distribution instruction Fixed described DCI size or DCI format also includes one below：

Described base station determines that the 6th DCI format uses a kind of DCI size, wherein, by using described 6th DCI The type of message of the DCI scheduling of format determines whether described 6th DCI format indicates resource in arrowband or arrowband Distribution；

Described base station determines that the 7th DCI format uses a kind of DCI size, the 8th DCI to use and divides for different resource Join two kinds of DCI size or DCI format of indicating mode, wherein, described 7th DCI format is used for coverage enhancement, Described 8th DCI is used for non-covered and strengthens, and determines institute by the corresponding coverage enhancement grade of described 7th DCI format State whether the 7th DCI format indicates resource allocation in arrowband or arrowband；

Described base station determines a kind of DCI size or DCI using the 9th resource distribution instruction mode of support for the 9th DCI Format, the tenth DCI uses another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, Wherein, determine it is to support described 9th resource distribution instruction mode or the tenth resource by the quantity that search space is gathered Distribution indicating mode；When the quantity of search space set is 1, determination is to support the 9th resource distribution instruction mode Or the tenth resource distribution instruction mode；When the quantity of search space set is 2, determine first search space Support the 9th resource distribution instruction mode, the tenth resource distribution instruction mode is supported in second search space set；

Described base station determine the 11st DCI using support the 11st resource distribution instruction mode a kind of DCI size or DCI format, the 12nd DCI is using another kind of DCI size or DCI of the 12nd resource distribution instruction mode of support Format, wherein, determines it is to support described 11st resource distribution instruction mode also by the type that search space is gathered It is the 12nd resource distribution instruction mode；The type of every kind of search space set only corresponds to the 11st DCI or the tenth One of two DCI DCI.

15. methods according to claim 1 are it is characterised in that described base station determines institute according at least to described type of message State DCI size or DCI format and include one below：

In the case that the type of message of described DCI scheduling is accidental access response RAR, described base station determines the tenth Three DCI use one of form 1C or form 1A, and the DCI size that the 14th DCI uses is single user RAR The size of message, wherein, described 13rd DCI is the DCI using during using RAR scheduling mode, the described tenth Four DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described base station determines that the 15th DCI uses two Plant DCI size or DCI format, the DCI size that the 16th DCI uses is the size of single user RAR message, its In, a kind of transmission means of RAR message is pre-configured with by base station, described transmission means includes RAR scheduling mode With RAR no scheduling mode, described 15th DCI is the DCI using during using RAR scheduling mode, the described tenth Six DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described base station determines that the 17th DCI uses two Plant DCI size or DCI format, the DCI size that the 18th DCI uses is the size of single user RAR message, its In, determined it is using RAR scheduling mode or to adopt RAR no dispatching party by resource location or search space type Formula, described 17th DCI is the DCI using during using RAR scheduling mode, and described 18th DCI is to adopt RAR No scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described base station determines that the 19th DCI uses two Plant DCI size or DCI format, the 20th DCI uses one of both DCI size or DCI format DCI Size or DCI format, wherein, described 19th DCI is the DCI using during using RAR scheduling mode, described 20th DCI be using RAR no scheduling mode when single user RAR message；Wherein, by reducing single user Bit number in RAR message makes itself and one of two kinds of DCI size or DCI format of described 19th DCI The size of DCI size or DCI format is identical, or, by increasing by two kinds of DCI size using RAR scheduling mode Or the bit number of one of DCI format DCI size or DCI format is so that this kind of DCI size or DCI format Identical with the size of the DCI size that described 20th DCI uses or DCI format.

16. methods according to any one of claim 1 to 15 are it is characterised in that described base station sends described DCI Including：

Described base station is used in mixed way in the different subframes once repeating to transmit and comprises different enhancing resource unit group EREG The enhancing control channel unit ECCE of quantity repeats to transmit described DCI and includes at least one of：

Support two kinds of maximum polymerization grade AL when different subframes take arrowband, respectively AL=24ECCE and AL=12ECCE, wherein, one of AL=24ECCE ECCE comprises 4 EREG, 1 in AL=12ECCE ECCE comprises 8EREG；

Only support a kind of polymerization grade AL in different subframes, when running into the subframe that 1 ECCE comprises 8EREG, no Using or skip or destroy the ECCE sequence number exceeding maximum ECCE quantity.

17. methods according to any one of claim 1 to 15 are it is characterised in that described base station is in different subframes Send described DCI and include at least one of：

In TDD system, described base station by continuous two special subframes resource merge using with And the resource in other subframes is used alone, to repeat to transmit described DCI；

When non-covered strengthens, according to frequency pattern during coverage enhancement not when sending described DCI in different subframes With in subframe using different frequency domains or arrowband position.

18. methods according to claim 13 or 14 it is characterised in that

Described base station according to machine type communication MTC Physical Downlink Control Channel M-PDCCH or strengthens under physics The optional arrowband set of row control channel EPDCCH determines arrowband indicating mode with remaining arrowband set, wherein, with Arrowband identical position in M-PDCCH or EPDCCH place is as one of arrowband location status indicating.

A kind of 19. Downlink Control Information dispensing devices, are applied to base station it is characterised in that including：

Determining module, for determining Downlink Control Information DCI transmission when institute's energy according at least to one of following information The resource that DCI size size using or DCI format format or DCI use：Coverage enhancement grade CE, money Source distribution instruction RA, scheduled type of message, search space set；Wherein, same DCI size is corresponding extremely A kind of few DCI format；

Sending module, described for being sent with the corresponding DCI format of a kind of DCI size that can use determining DCI, or a kind of DCI format described DCI of transmission that can use to determine for the described base station.

A kind of 20. Downlink Control Information method of reseptances are it is characterised in that include：

When user equipment (UE) determines Downlink Control Information DCI transmission of blind Detecting according at least to one of following information DCI size size or the resource that uses of DCI format format or DCI：Coverage enhancement grade CE, resource are divided Join instruction RA, scheduled type of message, search space set；Wherein, same DCI size corresponding at least one Plant DCI format；

The resource blind Detecting that described UE uses according to the DCI size that can use determining or DCI format or DCI The described DCI that described base station issues.

21. methods according to claim 20 it is characterised in that

The resource that described DCI uses Discrete Distribution in time domain according to coverage enhancement grade；And/or

The resource that physical down Traffic Channel PDSCH of described DCI scheduling is used Discrete Distribution in time domain.

22. methods according to claim 21 are it is characterised in that the resource of described DCI use is according to coverage enhancement etc. Level determination mode of Discrete Distribution in time domain includes：

Determine iterative transfer times N of described DCI according to coverage enhancement grade, wherein, repeating to transmit described DCI When, with M subframe for repeating transmission cycle, transmission Y described repetition transmission cycle, described repeats transmission week The interim number of sub frames for transmitting described DCI is k；

Wherein, N, M, Y are positive integer, and k ＜ M, k × Y=N.

23. methods according to claim 22 are it is characterised in that user equipment determines M according to the mode of one below Value：

The configuration that predefined, base station issues.

24. methods according to claim 23 are it is characterised in that user equipment is true according to the mode of at least one of Determine the value of Y or k：

Predefine, determined according to the configuration that base station issues, base station issues one group of possible configuration and is set by described user Standby is determined in the possible configuration of this group according to blind Detecting result, according to the determination of N value.

25. methods according to claim 20 are it is characterised in that described UE is true according at least to described coverage enhancement grade During fixed once transmission, the described DCI size that can use or DCI format includes one below：

Described UE determines that each different coverage enhancement grade uses different DCI size or DCI format, identical Coverage enhancement grade use one or two DCI size or DCI format；

Described UE determines that multiple different coverage enhancement grades use one or two DCI size or DCI format, Other coverage enhancement grades in addition to the plurality of different coverage enhancement grade are using another kind of or other two DCI size or DCI format；

Described UE determines all different coverage enhancement grades only using one or two DCI size or DCI format；

Wherein, when the DCI size species using is two kinds, then every kind of size only corresponds to a kind of DCI format； When the species of the DCI size using is a kind of, a kind of this DCI size corresponding at least one DCI format.

26. methods according to claim 25 are it is characterised in that wrap successively from low to high in described coverage enhancement grade Include：In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described UE determines that each different coverage enhancement grade uses different DCI size or DCI format, and identical covers and increases Strong grade is included using one or two DCI size or DCI format：

Described UE determines described first coverage enhancement grade, described second coverage enhancement grade, described 3rd covering Strengthen grade respectively using a DCI size or DCI format, the 2nd DCI size or DCI format, the 3rd DCI Size or DCI format；

Described UE determines that non-covered strengthens and uses the 4th DCI size or DCI format, wherein, a described DCI size Or DCI format includes one or two DCI size or DCI format, and/or, described 2nd DCI size Or DCI format includes one or two DCI size or DCI format, and/or, described 3rd DCI size Or DCI format includes one or two DCI size or DCI format, and/or, described 4th DCI size DCI size or DCI format including one or two.

27. methods according to claim 25 are it is characterised in that wrap successively from low to high in described coverage enhancement grade Include：In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described UE determines that multiple different coverage enhancement grades use one or two DCI size or DCI format, except described Other coverage enhancement grades outside multiple different coverage enhancement grades are using another kind of or other two DCI size Or DCI format includes one below：

Described UE determines that non-covered strengthens and uses one or two DCI size or DCI format, described first covers Lid strengthens grade, described second coverage enhancement grade and described 3rd coverage enhancement grade using another kind of or other two DCI size or DCI format；

Described UE determines that non-covered strengthens and described first coverage enhancement grade uses one or two DCI size Or DCI format, described second coverage enhancement grade and described 3rd coverage enhancement grade use another kind of or another two The DCI size planting or DCI format；

Described UE determines that non-covered strengthens, described first coverage enhancement grade and described second coverage enhancement grade make With one or two DCI size or DCI format, described 3rd coverage enhancement grade uses another kind of or another two The DCI size planting or DCI format.

28. methods according to claim 25 are it is characterised in that wrap successively from low to high in described coverage enhancement grade Include：In the case of first coverage enhancement grade, the second coverage enhancement grade, the 3rd coverage enhancement grade, described UE determine all different coverage enhancement grades only using one or two DCI size or DCI format include with One of lower：

Described UE determine non-covered enhancing, described first coverage enhancement grade, described second coverage enhancement grade and Described 3rd coverage enhancement grade uses same or two kinds DCI size or DCI format；

Described UE determines described first coverage enhancement grade, described second coverage enhancement grade and described 3rd covering Strengthen grade and use same or two kinds DCI size or DCI format.

29. methods according to claim 25 are it is characterised in that described UE is true according at least to described coverage enhancement grade Fixed described DCI size or DCI format includes：

Described UE determines for the enhanced DCI of non-covered using one or two DCI size or DCI format, its In, carry the machine type communication MTC Physical Downlink Control Channel M-PDCCH for the enhanced DCI of non-covered Or strengthen Physical Downlink Control Channel EPDCCH and take the transmission means of arrowband and include：Distributed transmission and/or collection Chinese style is transmitted, and at least includes the Candidate Set of the maximum polymerization grade of described transmission means in corresponding search space.

30. methods according to claim 20 are it is characterised in that described UE is true according at least to described resource distribution instruction Fixed described DCI size or DCI format includes one below：

Described UE determines that a DCI format and the 2nd DCI format uses a kind of DCI size, wherein, described Arrowband is not indicated, the resource allocation of described 2nd DCI format refers in the resource distribution instruction of the first DCI format Show middle instruction arrowband, a described DCI format includes filling bit, described filling bit is used for filling described One DCI format, so that a described DCI format and described 2nd DCI format has identical size；

Described UE determines that the 3rd DCI uses one or two DCI size or DCI format, wherein, pre- by base station First configure in described 3rd DCI and whether indicate arrowband；

Described UE determines that the 4th DCI format and the 5th DCI format uses a kind of DCI size, wherein, described The resource distribution instruction bit field of the 4th DCI format comprises not indicate arrowband and only indicates resource allocation in arrowband 4th frequency domain instruction and the 4th time domain instruction for indicating coverage enhancement iterative transfer times, described 5th DCI The resource distribution instruction bit field of format comprise to indicate resource allocation in arrowband and arrowband the 5th frequency domain instruction and For indicating the 5th time domain instruction of coverage enhancement iterative transfer times, the bit that described 4th time domain instruction takies The bit taking more than described 5th time domain instruction, the resource distribution instruction bit field of described 4th DCI format With the resource distribution instruction bit field of described 5th DCI format, there is identical size.

31. methods according to claim 20 are it is characterised in that described UE is true according at least to described resource distribution instruction Fixed described DCI size or DCI format also includes one below：

Described UE determines that the 6th DCI format uses a kind of DCI size, wherein, by using described 6th DCI The type of message of the DCI scheduling of format determines whether described 6th DCI format indicates resource in arrowband or arrowband Distribution；

Described UE determines that the 7th DCI format uses a kind of DCI size, the 8th DCI to use and divides for different resource Join two kinds of DCI size or DCI format of indicating mode, wherein, described 7th DCI format is used for coverage enhancement, Described 8th DCI is used for non-covered and strengthens, and determines institute by the corresponding coverage enhancement grade of described 7th DCI format State whether the 7th DCI format indicates resource allocation in arrowband or arrowband；

Described UE determines a kind of DCI size or DCI using the 9th resource distribution instruction mode of support for the 9th DCI Format, the tenth DCI uses another kind of DCI size or DCI format of the tenth resource distribution instruction mode of support, Wherein, determine it is to support described 9th resource distribution instruction mode or the tenth resource by the quantity that search space is gathered Distribution indicating mode；When the quantity of search space set is 1, determination is to support the 9th resource distribution instruction mode Or the tenth resource distribution instruction mode；When the quantity of search space set is 2, determine first search space Support the 9th resource distribution instruction mode, the tenth resource distribution instruction mode is supported in second search space set；

Described UE determine the 11st DCI using support the 11st resource distribution instruction mode a kind of DCI size or DCI format, the 12nd DCI is using another kind of DCI size or DCI of the 12nd resource distribution instruction mode of support Format, wherein, determines it is to support described 11st resource distribution instruction mode also by the type that search space is gathered It is the 12nd resource distribution instruction mode；The type of every kind of search space set only corresponds to the 11st DCI or the tenth One of two DCI DCI.

32. methods according to claim 20 are it is characterised in that described UE determines institute according at least to described type of message State DCI size or DCI format and include one below：

In the case that the type of message of described DCI scheduling is accidental access response RAR, described UE determines the tenth Three DCI use one of form 1C or form 1A, and the DCI size that the 14th DCI uses is single user RAR The size of message, wherein, described 13rd DCI is the DCI using during using RAR scheduling mode, the described tenth Four DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described UE determines that the 15th DCI uses two Plant DCI size or DCI format, the DCI size that the 16th DCI uses is the size of single user RAR message, its In, a kind of transmission means of RAR message is pre-configured with by base station, described transmission means includes RAR scheduling mode With RAR no scheduling mode, described 15th DCI is the DCI using during using RAR scheduling mode, the described tenth Six DCI be using RAR no scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described UE determines that the 17th DCI uses two Plant DCI size or DCI format, the DCI size that the 18th DCI uses is the size of single user RAR message, its In, determined it is using RAR scheduling mode or to adopt RAR no dispatching party by resource location or search space type Formula, described 17th DCI is the DCI using during using RAR scheduling mode, and described 18th DCI is to adopt RAR No scheduling mode when single user RAR message；

In the case that the type of message of described DCI scheduling is RAR, described UE determines that the 19th DCI uses two Plant DCI size or DCI format, the 20th DCI uses one of both DCI size or DCI format DCI Size or DCI format, wherein, described 19th DCI is the DCI using during using RAR scheduling mode, described 20th DCI be using RAR no scheduling mode when single user RAR message；Wherein, by reducing single user Bit number in RAR message makes itself and one of two kinds of DCI size or DCI format of described 19th DCI The size of DCI size or DCI format is identical, or, by increasing by two kinds of DCI size using RAR scheduling mode Or the bit number of one of DCI format DCI size or DCI format is so that this kind of DCI size or DCI format Identical with the size of the DCI size that described 20th DCI uses or DCI format.

33. methods according to any one of claim 20 to 32 are it is characterised in that described UE is according to the institute determining The DCI size that can the use or described DCI that issues of base station described in DCI format blind Detecting includes one below：

In TDD system, described UE carries out blind on continuous two special subframes or other subframes Detection, to repeat to receive described DCI；

When non-covered strengthens, according to frequency pattern during coverage enhancement not when receiving described DCI in different subframes With in subframe using different frequency domains or arrowband position.

34. methods according to claim 29 or 30 it is characterised in that

Described UE according to machine type communication MTC Physical Downlink Control Channel M-PDCCH or strengthens under physics The optional arrowband set of row control channel EPDCCH determines arrowband indicating mode with remaining arrowband set, wherein, with Arrowband identical position in M-PDCCH or EPDCCH place is as one of arrowband location status indicating.

A kind of 35. Downlink Control Information reception devices, are applied to user equipment (UE) it is characterised in that including：

Determining module, for determining Downlink Control Information DCI transmission of blind Detecting according at least to one of following information When DCI size size or the resource that uses of DCI format format or DCI：Coverage enhancement grade CE, resource Distribution instruction RA, scheduled type of message, search space set；Wherein, same DCI size is corresponding at least A kind of DCI format；

Receiver module, for the money being used according to the DCI size that can use determining or DCI format or DCI The described DCI that base station described in the blind Detecting of source issues.