CN104812079A - PDCCH (physical downlink control channel) resource distribution method and device - Google Patents

PDCCH (physical downlink control channel) resource distribution method and device Download PDF

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CN104812079A
CN104812079A CN201510158122.8A CN201510158122A CN104812079A CN 104812079 A CN104812079 A CN 104812079A CN 201510158122 A CN201510158122 A CN 201510158122A CN 104812079 A CN104812079 A CN 104812079A
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pdcch
current scheduling
down channel
channel quality
dispatch group
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CN104812079B (en
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曾海涛
王鑫芯
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Comba Network Systems Co Ltd
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Comba Telecom Technology Guangzhou Ltd
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Abstract

The invention discloses a PDCCH (physical downlink control channel) resource distribution method and device to increase PDCCH resource use rate and ensure UE (user equipment) demodulation success rate. The method includes the steps: determining an initial PDCCH format of each UE of a current dispatcher by a base station; estimating the number of PDCCH resources needed by the current dispatcher and OFDM (orthogonal frequency division multiplexing) symbolic numbers occupied by a control area; calculating the number of the currently distributable PDCCH resources; determining a final PDCCH format of each UE of the current dispatcher; distributing PDCCH time domains, frequency domains and power resources for each UE of the current dispatcher based on the final PDCCH format of each UE of the current dispatcher. Therefore, the PDCCH resources can be reasonably distributed, downlink throughput capacity is improved, the limited PDCCH resources are sufficiently used, the UE can effectively detect a PDCCH, and PDCCH demodulation performances are enhanced.

Description

A kind of distribution method of PDCCH resource and device
Technical field
The present invention relates to wireless communication technology field, particularly a kind of distribution method of PDCCH resource and device.
Background technology
Long Term Evolution (Long Term Evolution, LTE) and the descending sub frame of follow-up evolution system (LTE-A) thereof are divided into control area and data area.Wherein, control area is used for bearing downlink control signal, comprise Physical Control Format Indicator Channel (Physical Control Format Indication Channel, PCFICH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), physical mixed automatic repeat request indicating channel (Physical HARQ Indication Channel, PHICH); Data area is used for bearing downlink data, i.e. Physical Downlink Shared Channel (Physical Downlink SharedChannel, PDSCH).
Up-downgoing schedule information and control information are transmitted by PDCCH in base station, modulating-coding mechanism (MCS) information, power control command, HARQ information etc. of such as up-downgoing resource allocation information, uplink downlink, these information are usually with certain Downlink Control Information (Downlink Control Information, DCI) form combines, different DCI format is used for different scenes, comprises different control informations.
The channel resource of PDCCH is limited, it only can take in control area except PCFICH, PHICH and public reference signal (Common Reference Signal, CRS) outer resource, and in base station the PDCCH channel multiplexing of all UE in identical control channel region.
PDCCH channel format is respectively Format0, Format1, Format2, Format3, corresponding control channel unit (Control Channel Elements, CCE) number is respectively 1,2,4,8, wherein, { 1,2,4,8} is also called the polymerization grade of PDCCH channel, is determined by PDCCH channel format.Each CCE is by 9 resource group REG (Resource Element Group, REG) form, each REG is by 4 frequency domain continuous print Resource Unit (the Resource Element removed outside CRS, RE) form, each RE maps a Quadrature Phase Shift Keying (Quadrature Phase Shift Keying, QPSK) modulation symbol.
Subscriber equipment (User Equipment, UE) adopts the method for blind Detecting, detects PDCCH channel in specific search volume, just can carry out corresponding digital received and sent after only decoding PDCCH channel.The search volume of UE is divided into public search space and dedicated search space, public search space supports Format2 and Format3 two kinds of PDCCH channel formats, Format0, Format1, Format2, Format3 tetra-kinds of PDCCH channel formats are supported in dedicated search space, can adopt different PDCCH channel formats according to actual needs.
The distribution of PDCCH channel resource is most important, and the unreasonable of PDCCH channel allocation easily causes user to block owing to lacking control channel.Prior art can't provide a kind of self-adapting distribution method of effective reasonably PDCCH channel resource.
Summary of the invention
The embodiment of the present invention provides a kind of distribution method and device of PDCCH resource, in order to solve the unreasonable UE that easily causes of PDCCH channel allocation that prior art exists owing to lacking control channel and obstructing problem.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A distribution method for physical downlink control channel PDCCH resource, comprising:
The initial p DCCH form of each user equipment (UE) of current scheduling is determined in base station;
The PDCCH resource number needed for current scheduling, according to the initial p DCCH form of each UE of described current scheduling, is estimated in base station, and estimates the orthogonal frequency division multiplex OFDM symbolic number that control area takies further;
Base station calculates the assignable number of resources in control area according to described OFDM symbol number, and calculates current assignable PDCCH resource number further;
PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number compare by base station, determine the final PDCCH form of each UE of described current scheduling according to the comparative result obtained;
Base station based on the final PDCCH form of each UE of described current scheduling, for each UE of described current scheduling distributes PDCCH time domain, frequency domain and power resource.
Like this, can reasonable distribution PDCCH channel resource, improve downlink throughput capacity, make full use of limited PDCCH resource, ensure that UE can effectively detect PDCCH channel, improve PDCCH channel demodulation performance.
Preferably, the initial p DCCH form of each UE of current scheduling is determined in base station, specifically comprises:
Dividing into groups according to all UE of scheduling reference parameter by current scheduling in base station, generates multiple dispatch group;
The UE belonged in identical dispatch group is set to identical PDCCH form by base station, and the PDCCH form arranged by each UE is defined as initial p DCCH form.
The PDCCH resource number needed for current scheduling, according to the initial p DCCH form of each UE of described current scheduling, is estimated in base station, and estimates the OFDM symbol number that control area takies further.Like this, can according to the demand of current scheduling UE, the OFDM symbol number that in dynamic assignment descending sub frame, control area takies in the scope that base station is supported, so that resource as much as possible is used for downlink data transmission, improves base station down throughput.
Preferably, described scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
Preferably, dividing into groups according to all UE of scheduling reference parameter by current scheduling in base station, specifically comprises:
UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
Preferably, PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number compare by base station, determine the final PDCCH form of each UE of described current scheduling, specifically comprise according to the comparative result obtained:
Base station judges whether PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of base station to the UE of current scheduling adjusts, until PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number, and determine that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
Preferably, base station, to the basis enterprising Row sum-equal matrix of the UE of current scheduling at corresponding initial p DCCH form, specifically comprises:
Base station, based on described current assignable PDCCH resource number, is the current available PDCCH resource number of each dispatch group distribution;
The PDCCH resource number needed for corresponding dispatch group current scheduling, according to the initial p DCCH form of UE in each dispatch group, is estimated in base station;
Base station is when judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively.
Preferably, base station, to the basis enterprising Row sum-equal matrix of the UE of current scheduling at corresponding initial p DCCH form, specifically comprises:
The adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.
Preferably, base station is that each UE of described current scheduling distributes power resource, specifically comprises:
According to the final PDCCH form of current scheduling UE, the time-frequency domain resources position finally determined and down channel quality determination initial p DCCH transmitting power;
On the basis of described initial p DCCH transmitting power, adjust in conjunction with adjustment parameter, obtain final PDCCH transmitting power.
Like this, on the basis ensureing PDCCH channel demodulation performance, the interference of PDCCH channel can effectively be reduced.
Preferably, described adjustment parameter at least comprises:
PDCCH channel resource adjustment amount, down channel Signal to Interference plus Noise Ratio SINR adjustment amount and down channel quality adjustment amount, described PDCCH channel resource adjustment amount is determined based on the polymerization grade CCE number that the polymerization grade CCE number that UE final PDCCH form is corresponding is corresponding with initial p DCCH form, described down channel Signal to Interference plus Noise Ratio SINR adjustment amount is determined based on down channel SINR and PDCCH channel target SINR, described down channel quality adjustment amount is that CCE number that UE final PDCCH form is corresponding is when being less than CCE number corresponding to initial p DCCH form, difference between down channel quality and down channel quality threshold value.
A distributor for PDCCH resource, comprising:
Form management unit, for determining the initial p DCCH form of each UE of current scheduling;
Resource estimation unit, for the initial p DCCH form of each UE according to described current scheduling, estimate the PDCCH resource number needed for current scheduling, and estimate the OFDM symbol number that control area takies further, and calculate the assignable number of resources in control area according to described OFDM symbol number, and calculate current assignable PDCCH resource number further;
Form determining unit, the described current assignable PDCCH resource number obtained for PDCCH resource number needed for described current scheduling and described resource estimation unit compares, and according to comparative result, determine the final PDCCH form of each UE of described current scheduling;
Resource allocation unit, for the final PDCCH form of each UE based on described current scheduling, for each UE of described current scheduling distributes PDCCH time domain, frequency domain and power resource.
Like this, can reasonable distribution PDCCH channel resource, improve downlink throughput capacity, make full use of limited PDCCH resource, ensure that UE can effectively detect PDCCH channel, improve PDCCH channel demodulation performance.
Preferably, when determining the initial p DCCH form of each UE of current scheduling, described form management unit specifically for:
Divide into groups according to all UE of scheduling reference parameter by current scheduling, generate multiple dispatch group;
The UE belonged in identical dispatch group is set to identical PDCCH form, and the PDCCH form arranged by each UE is defined as initial p DCCH form.
Described resource estimation unit, according to the initial p DCCH form of each UE of described current scheduling, estimates the PDCCH resource number needed for current scheduling, and estimates the OFDM symbol number that control area takies further.Like this, can according to the demand of current scheduling UE, the OFDM symbol number that in dynamic assignment descending sub frame, control area takies in the scope that base station is supported, so that resource as much as possible is used for downlink data transmission, improves base station down throughput.
Preferably, undertaken in the process of dividing into groups at described form management unit by all UE of current scheduling, described scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
Preferably, when all UE of current scheduling being divided into groups according to scheduling reference parameter, described form management unit specifically for:
UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
Preferably, compare at PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number, according to obtain comparative result determine the final PDCCH form of each UE of described current scheduling time, described form determining unit specifically for:
Judge whether PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of the UE of current scheduling is adjusted, until PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number, and determine that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
Preferably, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, described form determining unit specifically for:
Based on described current assignable PDCCH resource number, for each dispatch group distributes current available PDCCH resource number;
According to the initial p DCCH form of UE in each dispatch group, estimate the PDCCH resource number needed for corresponding dispatch group current scheduling;
When judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively.
Preferably, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, described form determining unit specifically for:
The adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.
Preferably, for described current scheduling each UE distribute power resource time, described resource allocation unit specifically for:
According to the final PDCCH form of current scheduling UE, the time-frequency domain resources position finally determined and down channel quality determination initial p DCCH transmitting power;
On the basis of described initial p DCCH transmitting power, adjust in conjunction with adjustment parameter, obtain final PDCCH transmitting power.
Like this, on the basis ensureing PDCCH channel demodulation performance, the interference of PDCCH channel can effectively be reduced.
Preferably, in the process of described resource allocation unit adjustment initial p DCCH transmitting power, described adjustment parameter at least comprises:
PDCCH channel resource adjustment amount, down channel Signal to Interference plus Noise Ratio SINR adjustment amount and down channel quality adjustment amount, described PDCCH channel resource adjustment amount is determined based on the polymerization grade CCE number that the polymerization grade CCE number that UE final PDCCH form is corresponding is corresponding with initial p DCCH form, described down channel Signal to Interference plus Noise Ratio SINR adjustment amount is determined based on down channel SINR and PDCCH channel target SINR, described down channel quality adjustment amount is that CCE number that UE final PDCCH form is corresponding is when being less than CCE number corresponding to initial p DCCH form, difference between down channel quality and down channel quality threshold value.
Accompanying drawing explanation
Fig. 1 a is embodiment of the present invention PDCCH resource allocation flow figure;
Fig. 1 b is the adjustment mode flow chart of embodiment of the present invention PDCCH form;
Fig. 2 is architecture of base station schematic diagram in the embodiment of the present invention.
Embodiment
The embodiment of the present invention devises a kind of distribution method and device of PDCCH resource, the PDCCH form of UE is determined in the PDCCH form supported by the search volume of the UE in current scheduling, for the UE of current scheduling distributes the PDCCH time-frequency domain resources of not conflicting mutually in the PDCCH allowable resource that control area is determined, ensure that UE can effectively detect PDCCH channel, and in limited resource, as much as possible meet the demand of current scheduling UE, simultaneously, according to the PDCCH channel format of UE, time-frequency domain resources position, the adaptive distribution power resource of the parameters such as channel quality, on the basis ensureing PDCCH channel demodulation performance, effectively reduce the interference of PDCCH channel.
Below in conjunction with accompanying drawing, the preferred scheme of the embodiment of the present invention is elaborated.
Consult shown in Fig. 1 a, in the embodiment of the present invention, when carrying out PDCCH resource and distributing, base station specifically performs following operation:
Step 100: the initial p DCCH form of each UE of current scheduling is determined in base station.
Preferably, dividing into groups according to all UE of scheduling reference parameter by current scheduling in base station, generates multiple dispatch group; The UE belonged in identical dispatch group is tentatively set to identical PDCCH form by base station, and the PDCCH form tentatively arranged by each UE is defined as initial p DCCH form.
Wherein, scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
Particularly, UE adopts the method for blind Detecting to detect PDCCH channel in specific search volume, wherein, search volume can be divided into public search space and dedicated search space, public search space supports Format2 and Format3 two kinds of PDCCH channel formats, and Format0, Format1, Format2, Format3 tetra-kinds of PDCCH channel formats are supported in dedicated search space.
Base station according to UE position in the cell UE divided centered by UE and edge UE, that is, center UE refers to that this UE is positioned at the center of community, and edge UE refers to that this UE is positioned at the edge of community.RSRP or the RSRQ value that UE specifically can be adopted to report is determined,
Such as, when the value of the PSRP that UE reports (or RSRQ) is less than corresponding default threshold value, or, when PSRP (or RSRQ) certain value higher than this community, UE place of the PSRP (or RSRQ) of the adjacent area that UE reports, can judge that this UE is positioned at the edge of community, otherwise, judge that this UE is positioned at the center of community.
The information that can characterize arbitrarily down channel quality that base station can report according to UE determines the down channel quality of this UE.Such as CQI (Channel Quality Indicator, CQI), down channel SINR, downlink data ack/nack (i.e. ACK/NACK) feedback etc., also when UE does not report the information that can characterize down channel quality, the uplink signal-channel quality information prediction down channel quality of UE can be adopted.
Base station is in the process of dividing into groups to all UE of current scheduling, and at least divide into groups with reference to above-mentioned three kinds of scheduling reference parameters, the mode of grouping can adopt but be not limited to under type.
Such as, UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
Wherein, down channel quality thresholding refers to, when adopting the information of different sign down channel qualities, the predetermined threshold value that corresponding employing is different, such as, when adopting CQI for characterizing the information of down channel quality, using the CQI threshold value of correspondence as down channel quality threshold value, in the process of grouping, the CQI value reported by UE compares with the CQI threshold value preset, and compares the relation between the down channel quality of this UE and down channel quality threshold value with this.
It should be noted that, in the process of grouping, if UE had both needed to be assigned with public search space, when needing again to be assigned with dedicated search space, then this UE can be present in two dispatch group simultaneously.
So far, all UE of current scheduling divide into groups according to the various combination of scheduling reference parameter by base station, after grouping is determined, the PDCCH form organizing interior UE can tentatively be determined according to grouping in base station, wherein, base station is that all UE in same group tentatively distribute identical PDCCH form, as the initial p DCCH form of each UE.When same UE is present in two dispatch group, respectively an initial p DCCH form is preserved respectively to each dispatch group belonging to this UE.
Step 110: the PDCCH resource number needed for current scheduling, according to the initial p DCCH form of each UE of current scheduling, is estimated in base station, and estimate the OFDM symbol number that control area takies further.
First, base station is according to the initial p DCCH form of each UE of current scheduling, estimate at each UE when using initial p DCCH form, PDCCH resource number needed for all UE of current scheduling, then on the basis calculating PDCCH resource number needed for gained, add and the number of resources that other control channels except PDCCH channel of system configuration take obtain the total number resource of control area;
Then, the ODFM symbolic number of the descending sub frame that control area takies is estimated further.
Particularly, in actual applications, the descending OFDM symbol number that control area takies can be arranged according to the actual requirements in allowed band.LTE system supports 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz totally 6 kinds of different transmission bandwidths, and when transmission bandwidth is 1.4MHz, control area can take front 2 ~ 4 OFDM symbol of descending sub frame; During other transmission bandwidths, control area can take front 1 ~ 3 OFDM symbol of descending sub frame; For the descending special subframe in TD-LTE system, control area can take front 1 ~ 2 OFDM symbol of descending special subframe.
The maximum OFDM symbol number supposing the descending sub frame that the control area of base station system support takies is N, i.e. the control area descending sub frame top n ODFM symbol that can take at most.The number of resources of n ODFM symbolic number before the total number resource of control area estimating to obtain and LTE descending sub frame is compared, n is value from 1, often carry out a comparison, the value of n is added 1, can meet on the total number resource basis estimating the control area obtained until find, and the most suitable OFDM symbol number of occupying system resources minimum number object can be reached, and wherein, n≤N.
Such as, by the total number resource of control area estimating to obtain successively with first 1, first 2 ..., a front n OFDM symbol number number of resources compare, if estimate, the total number resource of the control area obtained is less than or equal to the number of resources of front 1 OFDM symbol number, then show that control area takies front 1 OFDM symbol and just can realize dispatching requirement, then for front 1 OFDM symbol is distributed in control area, otherwise, show that control area takies front 1 OFDM symbol and can not realize dispatching requirement, so, just will estimate that the total number resource of the control area obtained continues to compare with the number of resources of front 2 OFDM symbol, equally, if estimate, the total number resource of the control area obtained is less than or equal to the number of resources of front 2 OFDM symbol numbers, then show that control area takies front 2 OFDM symbol and just can realize dispatching requirement, then for front 2 OFDM symbol are distributed in control area, otherwise, show that control area takies front 2 OFDM symbol and can not realize dispatching requirement, so, just will estimate that the total number resource of the control area obtained continues to compare with the number of resources of front 3 OFDM symbol.
According to the method described above, until the OFDM symbol number finding control area to take can realize dispatching requirement, wherein, the control area that the OFDM symbol number that the final control area selected takies can not exceed base station system support takies OFDM symbol number scope.Namely, if the total number resource of control area estimating to obtain and the number of resources of top n OFDM symbol number are compared, estimate that the total number resource of the control area obtained still is greater than the number of resources of top n OFDM symbol number, then base station is the number of resources that top n OFDM symbol is distributed in control area.Such as, if when transmission bandwidth is 1.4MHz, estimate that the total number resource of the controlled area obtained is less than the number of resources of front 2 OFDM symbol numbers, then base station is the number of resources that front 2 OFDM symbol are distributed in control area.
So far, can determine when the UE of current scheduling uses initial p DCCH form, the OFDM symbol number of the most suitable descending sub frame that control area can take.
Step 120: base station according to estimating that the control area obtained takies the assignable number of resources in OFDM symbol number calculating control area of descending sub frame, and calculates current assignable PDCCH resource number further.
In step 110, by estimating to obtain when current scheduling UE uses initial p DCCH form, the number of resources of control area, and estimate to obtain the most suitable descending sub frame OFDM symbol number that control area can take by comparing.
Base station calculates the actual assignable number of resources in control area accordingly according to this OFDM symbol number, then deduct the number of resources that other control channels except PDCCH channel take on this basis, the actual assignable number of resources of current PDCCH channel can be obtained.
Like this, can according to the UE demand of current scheduling, the ODFM symbolic number that in dynamic assignment descending sub frame, control area takies in the scope that base station is supported.
Step 130: PDCCH resource number needed for current scheduling and current assignable PDCCH resource number compare by base station, determines the final PDCCH form of each UE of described current scheduling according to the comparative result obtained.
Particularly, base station judges whether PDCCH resource number needed for current scheduling is less than or equal to current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of base station to the UE of current scheduling adjusts, until PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number, and determine that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
Wherein, if base station judges that needed for current scheduling, PDCCH resource number is less than or equal to current assignable PDCCH resource number, show, current assignable PDCCH resource number can meet the PDCCH resource number needed for all UE of current scheduling, in such cases, the PDCCH form can determining each UE of current scheduling is initial p DCCH form, does not adjust it.
If base station judges that needed for current scheduling, PDCCH resource number is greater than current assignable PDCCH resource number, show, current assignable PDCCH resource number can not meet the PDCCH resource number needed for all UE of current scheduling, in such cases, the PDCCH form of the UE to current scheduling is just needed to adjust, until reach current assignable PDCCH resource number can meet PDCCH resource number needed for all UE of current scheduling.
In step 100, according to the packet mode preset, all UE of current scheduling are divided into groups, and determine initial p DCCH form for the UE in each dispatch group.Consult shown in Fig. 1 b below, the packet mode carried out for all UE of base station in step 100 to current scheduling, the adjustment mode for PDCCH form is introduced.
Step 1001: base station, based on current assignable PDCCH resource number, is the current available PDCCH resource number of each dispatch group distribution.
Alternatively, current assignable PDCCH resource number can be averagely allocated to each dispatch group by base station, also can according to the distribution principle pre-set, according to the demand of each dispatch group tentatively for each dispatch group distributes available PDCCH resource.
Step 1002: the PDCCH resource number needed for corresponding dispatch group current scheduling, according to the initial p DCCH form of UE in each dispatch group, is estimated in base station.
Base station is according to the initial p DCCH form of UE in a dispatch group, estimate this PDCCH resource number needed for dispatch group current scheduling, in this, can estimate for the PDCCH resource number needed for each dispatch group current scheduling, then, the current available PDCCH resource number distributed for it in the PDCCH resource number needed for each dispatch group current scheduling and step 1 is compared.
Step 1003: base station is when judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively.
Wherein, the adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.Particularly, base station is judging whether a current available PDCCH resource number of dispatch group can meet in the process of the current required PDCCH resource number of this dispatch group, if, then the PDCCH form of the UE in this dispatch group is not adjusted, otherwise, the PDCCH form of the UE in this dispatch group is adjusted.In the process of adjustment, according to reference quantities such as the dispatching priority order of UE in this dispatch group and the business demands of UE, adjust the polymerization grade of the PDCCH channel of UE in a certain order successively, change the PDCCH form of the UE of current adjustment thus, often adjust once, base station judges whether the current available PDCCH resource number of this dispatch group can meet the PDCCH resource number of needs after adjustment, if meet, then stop adjustment, and the PDCCH form after adjustment is defined as the final PDCCH form of the UE of this adjustment, the initial p DCCH form that in this dispatch group, other do not adjust the UE of PDCCH form is defined as final PDCCH form, if do not meet, the basis then also can continuing the polymerization grade adjusting PDCCH channel at current adjustment UE proceeds adjustment, or, can not continue, on the basis of the polymerization grade adjusting PDCCH channel, to adjust the polymerization grade of the PDCCH channel of UE next in this dispatch group in order at current adjustment UE.
If after adjusting the PDCCH form of last UE in this dispatch group, still cannot reach the requirement that the current available PDCCH resource number of this dispatch group can meet the PDCCH resource number of needs after adjustment, according to the priority orders of UE in described dispatch group, UE lower for priority is deleted from this dispatch group list, makes the current available PDCCH resource number of dispatch group can meet the requirement of the PDCCH resource number of UE needs in dispatch group.
Wherein, in the process of the polymerization grade of the PDCCH channel of adjustment UE, carry out increasing or reducing in the scope of the PDCCH form of UE support, can be, but not limited to adopt following adjustment mode:
Be the UE of Format0 for initial p DCCH form, adopt the mode increasing polymerization grade to adjust;
Be the UE of Format3 for initial p DCCH form, adopt the mode reducing polymerization grade to adjust;
Be the UE of Format1 or Format2 for initial p DCCH form, adopt the mode of first increases and then decreases polymerization grade to adjust, or, adopt the mode first reducing to increase afterwards polymerization grade to adjust.
So far, can obtain the final PDCCH form of each UE in each dispatch group, wherein, the final PDCCH form of the UE after adjustment is the PDCCH form of last adjustment, and the final PDCCH form of unjustified UE is initial p DCCH form.
Step 140: base station based on the final PDCCH form of each UE of current scheduling, for each UE of current scheduling distributes PDCCH time domain, frequency domain and power resource.
Wherein, when each UE for current scheduling distributes PDCCH time domain, frequency domain resource, the Resourse Distribute of public search space can preferentially be met.The PDCCH dedicated search space of different UEs may overlap, and likely occurs the occupied situation of some or all candidate spatial of PDCCH, cause PDCCH resource to be distributed unsuccessfully during mapping.In this case, the PDCCH form of the UE of dedicated search space coincidence is adjusted, until each UE of dedicated search space coincidence all completes PDCCH channel resource allocation, till maybe cannot continuing to distribute PDCCH resource again by adjustment.Now, the PDCCH channel format after adjustment is the PDCCH channel format that UE finally determines.
Like this, can realize, as far as possible for the UE of each scheduling distributes the PDCCH time-frequency domain resources of not conflicting mutually, ensureing that UE can effectively detect PDCCH channel.
Base station is when each UE for current scheduling distributes PDCCH power resource, be the final PDCCH form of foundation UE, running time-frequency resource position, down channel quality, the initial p DCCH transmitting power that the correct demodulation of DCI that running time-frequency resource position is met PDCCH channel by link computing requires (is designated as P pdcch, init), and it is adjusted, the transmitting power obtaining PDCCH final (is designated as P pdcch, last).Method of adjustment is:
P Pdcch,last＝P Pdcch,init+Δ CCE,adjust+Δ SINR,adjust+Δ quality,adjust
Wherein, Δ cCE, adjustfor PDCCH channel resource adjustment amount; Δ sINR, adjustfor down channel Signal to Interference plus Noise Ratio SINR adjustment amount; Δ quality, adjustfor down channel quality adjustment amount.
Particularly, this PDCCH channel resource adjustment amount Δ cCE, adjustcomputational methods be: Δ cCE, adjust=lg (N cce, init/ N cce, last), N cce, initfor CCE (i.e. polymerization grade) number needed for the initial p DCCH form of scheduling UE, N cce, lastfor the CCE number needed for the final PDCCH form of scheduling UE, obviously, when the initial p DCCH form dispatching UE is identical with final PDCCH form, PDCCH channel resource adjustment amount is zero;
This down channel Signal to Interference plus Noise Ratio SINR adjustment amount Δ sINR, adjustwhen down channel SINR for scheduling UE is less than the target SINR of PDCCH channel, the absolute value of down channel SINR and target SINR difference, if when down channel quality adopts other downlink channel quality informations except SINR to characterize, continue after other downlink channel quality informations are mapped as SINR to adopt above-mentioned computing formula to calculate;
This down channel quality adjustment amount Δ quality, adjust, when the final PDCCH channel aggregation grade for scheduling UE is less than initial p DCCH channel aggregation grade, the difference of this down channel quality and down channel quality threshold value.
Wherein, the transmitting power of the PDCCH channel that scheduling UE finally determines, must meet the modulating-coding requirement of PDCCH channel.Further, base station is according to the rated power of configuration, and in each OFDM symbol that control area takies, PDCCH channel gross power adds that the power of PDCCH channel other channels outer should be no more than the rated power of base station.
Based on above-described embodiment, consult shown in Fig. 2, in the present invention, base station comprises form management unit 20, resource estimation unit 21, form determining unit 22 and resource allocation unit 23.Wherein:
Form management unit 20, for determining the initial p DCCH form of each UE of current scheduling;
Resource estimation unit 21, for the initial p DCCH form of each UE according to current scheduling, estimate the PDCCH resource number needed for current scheduling, and estimate the OFDM symbol number that control area takies further, and calculate the assignable number of resources in control area according to OFDM symbol number, and calculate current assignable PDCCH resource number further;
Form determining unit 22, the current assignable PDCCH resource number obtained for PDCCH resource number needed for current scheduling and resource estimation unit 21 compares, and according to comparative result, determines the final PDCCH form of each UE of current scheduling;
Resource allocation unit 23, for the final PDCCH form of each UE based on current scheduling, for each UE of current scheduling distributes PDCCH time domain, frequency domain and power resource.
Like this, can reasonable distribution PDCCH channel resource, improve downlink throughput capacity, make full use of limited PDCCH resource, ensure that UE can effectively detect PDCCH channel, improve PDCCH channel demodulation performance.
Preferably, when determining the initial p DCCH form of each UE of current scheduling, form management unit 20 specifically for:
Divide into groups according to all UE of scheduling reference parameter by current scheduling, generate multiple dispatch group;
The UE belonged in identical dispatch group is set to identical PDCCH form, and the PDCCH form arranged by each UE is defined as initial p DCCH form.
Resource estimation unit 21, according to the initial p DCCH form of each UE of current scheduling, estimates the PDCCH resource number needed for current scheduling, and estimates the OFDM symbol number that control area takies further.Like this, can according to the demand of current scheduling UE, the OFDM symbol number that in dynamic assignment descending sub frame, control area takies in the scope that base station is supported, so that resource as much as possible is used for downlink data transmission, improves base station down throughput.
Preferably, undertaken in the process of dividing into groups at form management unit 20 by all UE of current scheduling, scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
Preferably, when all UE of current scheduling being divided into groups according to scheduling reference parameter, form management unit 20 specifically for:
UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
Preferably, compare at PDCCH resource number needed for current scheduling and current assignable PDCCH resource number, during the final PDCCH form of each UE according to the comparative result determination current scheduling obtained, form determining unit 22 specifically for:
Judge whether PDCCH resource number needed for current scheduling is less than or equal to current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of the UE of current scheduling is adjusted, until PDCCH resource number needed for current scheduling is less than or equal to current assignable PDCCH resource number, and determines that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
Preferably, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, form determining unit 22 specifically for:
Based on current assignable PDCCH resource number, for each dispatch group distributes current available PDCCH resource number;
According to the initial p DCCH form of UE in each dispatch group, estimate the PDCCH resource number needed for corresponding dispatch group current scheduling;
When judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively;
Preferably, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, form determining unit 22 specifically for:
The adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.
Preferably, for current scheduling each UE distribute power resource time, resource allocation unit 23 specifically for:
According to the final PDCCH form of current scheduling UE, the time-frequency domain resources position finally determined and down channel quality determination initial p DCCH transmitting power;
On the basis of initial p DCCH transmitting power, adjust in conjunction with adjustment parameter, obtain final PDCCH transmitting power.
Like this, on the basis ensureing PDCCH channel demodulation performance, the interference of PDCCH channel can effectively be reduced.
Preferably, adjust in the process of initial p DCCH transmitting power at resource allocation unit 23, adjustment parameter at least comprises:
PDCCH channel resource adjustment amount, down channel Signal to Interference plus Noise Ratio SINR adjustment amount and down channel quality adjustment amount, PDCCH channel resource adjustment amount is determined based on the polymerization grade CCE number that the polymerization grade CCE number that UE final PDCCH form is corresponding is corresponding with initial p DCCH form, down channel Signal to Interference plus Noise Ratio SINR adjustment amount is determined based on down channel SINR and PDCCH channel target SINR, down channel quality adjustment amount is that CCE number that UE final PDCCH form is corresponding is when being less than CCE number corresponding to initial p DCCH form, difference between down channel quality and down channel quality threshold value.
In sum, in the embodiment of the present invention, the initial p DCCH form of each UE of current scheduling is determined in base station, according to the initial p DCCH form of each UE of current scheduling, estimate the PDCCH resource number needed for current scheduling, and estimate the OFDM symbol number that control area takies further, the assignable number of resources in control area is calculated according to OFDM symbol number, and calculate current assignable PDCCH resource number further, PDCCH resource number needed for current scheduling and current assignable PDCCH resource number are compared, according to the final PDCCH form of each UE of the comparative result determination current scheduling obtained, and the final PDCCH form of each UE based on current scheduling, for each UE of current scheduling distributes PDCCH time domain, frequency domain and power resource.Like this, can according to the demand of current scheduling UE, the OFDM symbol number that in dynamic assignment descending sub frame, control area takies in the scope that base station is supported, resource as much as possible is used for downlink data transmission, improve base station down throughput, and, in control area PDCCH allowable resource in, for the UE of current scheduling distributes the PDCCH time-frequency domain resources of not conflicting mutually, ensure that UE can effectively detect PDCCH channel, and as much as possible meet the demand of current scheduling UE in limited resource.Meanwhile, according to the PDCCH form of UE, running time-frequency resource position, channel quality self-adjusted block power resource, on the basis ensureing PDCCH channel demodulation performance, effectively reduce the interference of PDCCH channel.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (18)

1. a distribution method for physical downlink control channel PDCCH resource, is characterized in that, comprising:
The initial p DCCH form of each user equipment (UE) of current scheduling is determined in base station;
The PDCCH resource number needed for current scheduling, according to the initial p DCCH form of each UE of described current scheduling, is estimated in base station, and estimates the orthogonal frequency division multiplex OFDM symbolic number that control area takies further;
Base station calculates the assignable number of resources in control area according to described OFDM symbol number, and calculates current assignable PDCCH resource number further;
PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number compare by base station, determine the final PDCCH form of each UE of described current scheduling according to the comparative result obtained;
Base station based on the final PDCCH form of each UE of described current scheduling, for each UE of described current scheduling distributes PDCCH time domain, frequency domain and power resource.
2. the method for claim 1, is characterized in that, the initial p DCCH form of each UE of current scheduling is determined in base station, specifically comprises:
Dividing into groups according to all UE of scheduling reference parameter by current scheduling in base station, generates multiple dispatch group;
The UE belonged in identical dispatch group is set to identical PDCCH form by base station, and the PDCCH form arranged by each UE is defined as initial p DCCH form.
3. method as claimed in claim 2, it is characterized in that, described scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
4. method as claimed in claim 2, it is characterized in that, dividing into groups according to all UE of scheduling reference parameter by current scheduling in base station, specifically comprises:
UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
5. the method as described in any one of claim 1-4, it is characterized in that, PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number compare by base station, determine the final PDCCH form of each UE of described current scheduling according to the comparative result obtained, specifically comprise:
Base station judges whether PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of base station to the UE of current scheduling adjusts, until PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number, and determine that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
6. method as claimed in claim 5, it is characterized in that, base station, to the basis enterprising Row sum-equal matrix of the UE of current scheduling at corresponding initial p DCCH form, specifically comprises:
Base station, based on described current assignable PDCCH resource number, is the current available PDCCH resource number of each dispatch group distribution;
The PDCCH resource number needed for corresponding dispatch group current scheduling, according to the initial p DCCH form of UE in each dispatch group, is estimated in base station;
Base station is when judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively.
7. method as claimed in claim 6, it is characterized in that, base station, to the basis enterprising Row sum-equal matrix of the UE of current scheduling at corresponding initial p DCCH form, specifically comprises:
The adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.
8. the method as described in claim 1,2 or 3, is characterized in that, base station is that each UE of described current scheduling distributes power resource, specifically comprises:
According to the final PDCCH form of current scheduling UE, the time-frequency domain resources position finally determined and down channel quality determination initial p DCCH transmitting power;
On the basis of described initial p DCCH transmitting power, adjust in conjunction with adjustment parameter, obtain final PDCCH transmitting power.
9. method as claimed in claim 8, it is characterized in that, described adjustment parameter at least comprises:
PDCCH channel resource adjustment amount, down channel Signal to Interference plus Noise Ratio SINR adjustment amount and down channel quality adjustment amount, described PDCCH channel resource adjustment amount is determined based on the polymerization grade CCE number that the polymerization grade CCE number that UE final PDCCH form is corresponding is corresponding with initial p DCCH form, described down channel Signal to Interference plus Noise Ratio SINR adjustment amount is determined based on down channel SINR and PDCCH channel target SINR, described down channel quality adjustment amount is that CCE number that UE final PDCCH form is corresponding is when being less than CCE number corresponding to initial p DCCH form, difference between down channel quality and down channel quality threshold value.
10. a distributor for PDCCH resource, is characterized in that, comprising:
Form management unit, for determining the initial p DCCH form of each UE of current scheduling;
Resource estimation unit, for the initial p DCCH form of each UE according to described current scheduling, estimate the PDCCH resource number needed for current scheduling, and estimate the OFDM symbol number that control area takies further, and calculate the assignable number of resources in control area according to described OFDM symbol number, and calculate current assignable PDCCH resource number further;
Form determining unit, the described current assignable PDCCH resource number obtained for PDCCH resource number needed for described current scheduling and described resource estimation unit compares, and according to comparative result, determine the final PDCCH form of each UE of described current scheduling;
Resource allocation unit, for the final PDCCH form of each UE based on described current scheduling, for each UE of described current scheduling distributes PDCCH time domain, frequency domain and power resource.
11. devices as claimed in claim 10, is characterized in that, when determining the initial p DCCH form of each UE of current scheduling, described form management unit specifically for:
Divide into groups according to all UE of scheduling reference parameter by current scheduling, generate multiple dispatch group;
The UE belonged in identical dispatch group is set to identical PDCCH form, and the PDCCH form arranged by each UE is defined as initial p DCCH form.
12. devices as claimed in claim 11, it is characterized in that, undertaken in the process of dividing into groups at described form management unit by all UE of current scheduling, described scheduling reference parameter at least comprises: the search volume of UE, UE position in the cell and the down channel quality of UE.
13. devices as claimed in claim 11, is characterized in that, when all UE of current scheduling being divided into groups according to scheduling reference parameter, described form management unit specifically for:
UE down channel quality in public search space being more than or equal to default down channel quality threshold value is divided into the first dispatch group;
UE down channel quality in public search space being less than described down channel quality threshold value is divided into the second dispatch group;
Cell edge will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 3rd dispatch group in dedicated search space;
Cell edge will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 4th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is more than or equal to described down channel quality threshold value is divided into the 5th dispatch group in dedicated search space;
Center of housing estate will be positioned at and the UE that down channel quality is less than described down channel quality threshold value is divided into the 6th dispatch group in dedicated search space.
14. devices as described in any one of claim 10-13, it is characterized in that, compare at PDCCH resource number needed for described current scheduling and described current assignable PDCCH resource number, according to obtain comparative result determine the final PDCCH form of each UE of described current scheduling time, described form determining unit specifically for:
Judge whether PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number;
If so, then the PDCCH form of the UE of current scheduling is not adjusted, and determine that the initial p DCCH form of each UE of current scheduling is final PDCCH form;
Otherwise, the PDCCH form of the UE of current scheduling is adjusted, until PDCCH resource number needed for described current scheduling is less than or equal to described current assignable PDCCH resource number, and determine that the PDCCH form after adjusting is the final PDCCH form of corresponding UE.
15. devices as claimed in claim 14, is characterized in that, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, described form determining unit specifically for:
Based on described current assignable PDCCH resource number, for each dispatch group distributes current available PDCCH resource number;
According to the initial p DCCH form of UE in each dispatch group, estimate the PDCCH resource number needed for corresponding dispatch group current scheduling;
When judging that the PDCCH resource number needed for a dispatch group current scheduling is greater than the current available PDCCH resource number that the dispatch group as current judgement distributes, by the UE in the dispatch group of current judgement according to priority orders, perform the adjustment of PDCCH channel format successively.
16. devices as claimed in claim 15, is characterized in that, to the UE of current scheduling at the enterprising Row sum-equal matrix in the basis of corresponding initial p DCCH form time, described form determining unit specifically for:
The adjustment of PDCCH channel format is often performed for a UE, whether the PDCCH resource number judging needed for corresponding dispatch group current scheduling is not more than the current available PDCCH resource number distributed for corresponding dispatch group, if, then stop the adjustment of the PDCCH channel format to UE in corresponding dispatch group, otherwise, continue the adjustment of the PDCCH channel format to UE in corresponding dispatch group.
17. devices as described in claim 10,11 or 12, is characterized in that, when each UE for described current scheduling distributes power resource, described resource allocation unit specifically for:
According to the final PDCCH form of current scheduling UE, the time-frequency domain resources position finally determined and down channel quality determination initial p DCCH transmitting power;
On the basis of described initial p DCCH transmitting power, adjust in conjunction with adjustment parameter, obtain final PDCCH transmitting power.
18. devices as claimed in claim 17, is characterized in that, in the process of described resource allocation unit adjustment initial p DCCH transmitting power, described adjustment parameter at least comprises:
PDCCH channel resource adjustment amount, down channel Signal to Interference plus Noise Ratio SINR adjustment amount and down channel quality adjustment amount, described PDCCH channel resource adjustment amount is determined based on the polymerization grade CCE number that the polymerization grade CCE number that UE final PDCCH form is corresponding is corresponding with initial p DCCH form, described down channel Signal to Interference plus Noise Ratio SINR adjustment amount is determined based on down channel SINR and PDCCH channel target SINR, described down channel quality adjustment amount is that CCE number that UE final PDCCH form is corresponding is when being less than CCE number corresponding to initial p DCCH form, difference between down channel quality and down channel quality threshold value.
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