CN101820669B - Method and device for allocating PDCCH resources - Google Patents

Abstract

The invention discloses a method and a device for allocating PDCCH resources, which is used in a communication system comprising a plurality of cells and allocates PDCCH resources for cell edge users or cell center users in the cells. The method comprises the following steps: dividing PDCCH resources into a plurality of control channel unit CCE sets; configuring main CCE sets and subsidiary CCE sets for the cells based on the CCE sets; and allocating the resources of the main CCE sets to the cell edge users, and allocating the resources of the subsidiary CCE sets to the cell center users. The invention improves the carrying capacity of the PDCCH channel transmission, ensures the reliability of the PDCCH transmission for the edge users, and meets the QoS requirements of the users.

Description

A kind of method and apparatus of PDCCH resource allocation

Technical field

The present invention relates to communication technical field, particularly a kind of method and apparatus of PDCCH resource allocation.

Background technology

3GPP LTE (Long Term Evolution; Long Term Evolution) system is 3G (3rd Generation; The 3G (Third Generation) Moblie technology) Long Term Evolution version; The LTE system provides higher user's peak-data rates, bigger coverage and better Cell Edge User QoS (Quality of Service, service quality) etc.

In the LTE system; Through on down direction, adopting OFDMA (Orthogonal FrequencyDivision Multiple Access; OFDMA technology); On up direction, adopt the SC-FDMA (Single Carrier-Frequency Division Multiple Access, single-carrier frequency division multiple access) of low peak average ratio, in addition; The LTE system also adopts MIMO (Multiple Input MultipleOutput, the multiple-input and multiple-output) technology of multi-antenna technology that the gain and the emission diversity gain of spatial reuse is provided.Therefore; The LTE system can with resource comprise time domain, three dimensions of frequency domain and spatial domain; The channel condition information of base station through user in scheduling and resource allocation algorithm and the sub-district neatly, reasonably select suitable time slot, PRB (Physical Resource Block respectively for the user; Physical Resource Block), MCS (Modulation and CodingScheme; The modulating-coding form), transmitting power, MIMO transmission plan or the like, improve the total throughout of system, satisfy the rate requirement of Cell Edge User.

In the LTE system; All kinds DCI (the Downlink ControlInformation that send to the user base station; Downlink Control Information) all be carried among the PDCCH and transmit, wherein, DCI comprises that scheduling authorizes Scheduling Grant, resource indication and modulation coding mode etc.

In the 10ms frame structure of LTE definition; In the TTI (TransmissionTime Interval, Transmission Time Interval) of 1ms descending sub frame correspondence, only take the individual OFDM of preceding n (n＜=3) (Orthogonal Frequency Division Multiplexing on the PDCCH time domain; OFDM) symbol; Take on the frequency domain remove other channels on the system bandwidth to use resources after remaining frequency range, wherein, other channels such as reference signal, PCFICH (Physical Control Format Indicator Channel; The physical format indicating channel), PHICH (Physical HARQ Indicator Channel, physics HARQ designator) etc.Therefore in each descending sub frame, only there is the reservation running time-frequency resource of limited quantity to can be used for transmitting Downlink Control Information, this part running time-frequency resource is called control domain Control Region.

The least unit of PDCCH resource allocation is CCE (Control Channel Element, control channel unit), and 1 CCE comprises 9 REG (Resource Element Group, resource unit group), i.e. 36 RE (Resource Element, Resource Unit).For reliability in various degree is provided through code rate, allow CCE that four kinds of AL (Aggregation Level, combination grade) are arranged, AL=1,2,4 and 8, corresponding respectively PDCCH channel resource takies 1,2,4 or 8 CCE simultaneously.

According to the difference of DCI type of transmission, the whole search volume of PDCCH comprises two types of CSS (CommonSearch Space, common search space) and USS (UE-specific Search Space, user-specific search volume).Place the position of the CSS of common detection information and fix, and USS is used to transmit the information relevant with the individual user, the resource mapping in this space need be carried out the PDCCH resource allocation to the user who dispatches in the sub-district through the base station and confirm.

Concrete, the user adopts the DCI in the blind checking method demodulation PDCCH territory, and each UE monitors PDCCH candidate (Candidate) collection in the USS of sub-district simultaneously and attempts demodulation one by one, and the number of the PDCCH candidate collection that different AL are corresponding is as shown in table 1.

The number of table 1PDCCH Candidate Set

Through the purpose that PDCCH Candidate Set number is set is in order to reduce user's blind Detecting institute's time-consuming and to reduce processing complexity, however this also largely limit the operable PDCCH resource of each user.Blind checking method has defined the original position of each UE monitoring PDCCH Candidate Set simultaneously.The corresponding CCE sequence number S of monitoring starting point _kRelevant with the CCE sum of UE_ID and control domain.

S _k＝AL×(Y _kmod[N _CCE，k/AL]) (1)

Y _k＝(39827·Y _k-1)mod65537 (2)

Wherein, N _{CCE, k}Represent the CCE number in the k sub-frame control domain, Y _-1Carry out initialization with UE_ID.For example, work as N _{CCE, k}=40, the position of the PDCCH Candidate Set of AL=1,2,4 and 8 correspondences is as shown in Figure 1 during UE_ID=1.As can be seen from Figure 1, in the LTE system, the resource that is used to transmit Downlink Control Information is very limited, and the resource allocation of PDCCH is also owing to the restriction of the quantity of user's Candidate Set and position demonstrates the resource allocation different features with Traffic Channel.

Concrete; From the angle of single sub-district, in the process of carrying out the PDCCH transmission, the base station is when distributing the PDCCH resource to the user; In order to satisfy the reliability of subscriber control information transmission; The CCE size that need to guarantee to distribute to the user is enough big, in addition, need reduce the resource of distributing to the user for fear of the collision of the resource between the user to carry more user as far as possible.From the angle of many sub-districts, the interference of minizone causes PDCCH channel top edge user performance to descend, even can cause the part edge user can't correctly receive DCI, and most of edge customer has only the CCE of use large-size could guarantee its reliability.Therefore, in the LTE system, carry out the branch timing of PDCCH resource, how to realize the more user of PDCCH channel bearing, and guarantee the reliability of Cell Edge User PDCCH transmission, the QoS demand that satisfies edge customer is a problem demanding prompt solution in the prior art.

Summary of the invention

In view of this, the invention provides a kind of method and apparatus of PDCCH resource allocation, be used to improve the bearing capacity of PDCCH Channel Transmission, guarantee the reliability of edge customer PDCCH transmission, and satisfy user's QoS demand.

The invention provides a kind of method of physical downlink control channel PDCCH resource allocation; Be applied to comprise in the communication system of a plurality of sub-districts; Be Cell Edge User in said a plurality of sub-districts or Cell Center User distribution PDCCH resource, said method comprising the steps of:

Each the cell edge resource requirement ratio that is used for current PDCCH transmission according to the cell edge blocking rate estimation of last subframe PDCCH transmission; And be n disjoint CCE collection according to said demand percentage with said PDCCH resource division, n is the number of sub-district in the cell group;

Be the main CCE collection of said CCE collection of said cell allocation as said sub-district, the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to the auxilliary CCE collection of (n-1) individual CCE collection of other users in the said cell group as said sub-district;

Said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source.

Preferably, be the main CCE collection of said CCE collection of said cell allocation as said sub-district, the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to after other users' in the said cell group the auxilliary CCE collection of (n-1) individual CCE collection as said sub-district; Also comprise: the transmitting power that said sub-district master CCE collection and auxilliary CCE concentrate each CCE is set, and the transmitting power that said main CCE collection is set is higher than the transmitting power of said auxilliary CCE collection; The identical transmitting power of CCE in the CCE continuation subset is set, and the CCE that belongs in the different CCE continuation subsets has distinct transmit power.

Preferably, said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source, also comprise before:

According to the transmitting power of Reference Signal Received Power RSRP and the said sub-district master CCE collection and the auxilliary CCE collection of said sub-district that receives and adjacent sub-district, calculate said community user respectively at the Signal to Interference plus Noise Ratio SINR of main CCE collection with at the SINR of auxilliary CCE collection;

In said sub-district master CCE collection and auxilliary CCE collection, search the PDCCH Candidate Set, obtain the major-minor alternative AL collection { AL} of said community user respectively; Major-minor alternative AL collection { AL} according to the said community user that obtains; Corresponding target door limit value

is wherein on major-minor CCE collection to obtain said community user respectively; In the said target door limit value ; AL belongs to said major-minor alternative AL collection, and { AL}, DCI are the type of Downlink Control Information DCI;

The SINR of more said main CCE collection and said target door limit value corresponding on main CCE collection

The SINR of more said auxilliary CCE collection and said at the target door limit value of assisting correspondence on the CCE collection

When satisfying inequality

Obtaining AL respectively is the last AL that supports of SINR of said main CCE collection and auxilliary CCE collection, and obtains the minimum AL of said user on said main CCE collection _Min, obtain the minimum AL of said user on said auxilliary CCE collection _Min

Preferably, the said sub-district RSRP according to said reporting of user is divided into said Cell Edge User and said Cell Center User with the user in the said sub-district;

Said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source, specifically comprise:

When said user is Cell Edge User, according to the AL on said main CCE collection _MinOrder from small to large sorts to said Cell Edge User, concentrates and belongs in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinSaid Cell Edge User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Edge User;

When said user is Cell Center User, according to the AL on said auxilliary CCE collection _MinOrder from small to large sorts to said Cell Center User, concentrates and belongs in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinSaid Cell Center User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Center User.

Preferably, said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source, also comprise afterwards judging whether to exist remaining main CCE fund-raising source or auxilliary CCE fund-raising source;

There is remaining main CCE fund-raising source when judging; And when confirming to exist the Cell Center User in unallocated auxilliary CCE fund-raising source; Sort according to the Cell Center User of service quality QoS priority order from high to low to said unallocated auxilliary CCE fund-raising source; Concentrate and belong in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at main CCE, judge whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinThe Cell Center User in said unallocated auxilliary CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Center User in next unallocated auxilliary CCE fund-raising source; There is not remaining main CCE fund-raising source when judging, and when confirming to have the Cell Center User in unallocated auxilliary CCE fund-raising source, the Cell Center User in said unallocated auxilliary CCE fund-raising source is blocked processing;

There is remaining auxilliary CCE fund-raising source when judging; And when confirming to exist the Cell Edge User in unallocated main CCE fund-raising source; Sort according to the Cell Edge User of QoS priority order from high to low to said unallocated main CCE fund-raising source; Concentrate and belong in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at auxilliary CCE, judge whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinThe Cell Edge User in said unallocated main CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Edge User in next unallocated main CCE fund-raising source; There is not remaining said auxilliary CCE fund-raising source when judging, and when confirming to have the Cell Edge User in unallocated said main CCE fund-raising source, the Cell Edge User in said unallocated main CCE fund-raising source is blocked processing;

Said QoS grade is one or more in said user's propagation delay time requirement, the fairness parameter.

The present invention also provides a kind of device of physical downlink control channel PDCCH resource allocation; It is characterized in that; Be applied to comprise in the communication system of a plurality of sub-districts that be Cell Edge User in said a plurality of sub-districts or Cell Center User distribution PDCCH resource, this device comprises:

Divide module; Be used for being used for each cell edge resource requirement ratio of current PDCCH transmission according to the cell edge blocking rate estimation of last subframe PDCCH transmission; And be n disjoint CCE collection according to said demand percentage with said PDCCH resource division, n is the number of sub-district in the cell group;

Configuration module is used for said a plurality of CCE collection of obtaining according to said division Module Division, is the main CCE collection of said CCE collection of said cell allocation as said sub-district, and the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to the auxilliary CCE collection of (n-1) individual CCE collection of other users in the said cell group as said sub-district;

Resource distribution module is used for said Cell Edge User is distributed in said main CCE fund-raising source, and said Cell Center User is distributed in said auxilliary CCE fund-raising source.

Preferably, said device also comprises module is set, and is used to be provided with the transmitting power that said sub-district master CCE collection and auxilliary CCE concentrate each CCE, and the transmitting power that said main CCE collection is set is higher than the transmitting power of said auxilliary CCE collection; The identical transmitting power of CCE in the CCE continuation subset is set, and the CCE that belongs in the different CCE continuation subsets has distinct transmit power.

Preferably, said device also comprises computing module, is used for according to the said sub-district and the RSRP of adjacent sub-district and the transmitting power of said sub-district master CCE collection and auxilliary CCE collection that receive, calculates said community user respectively at the SINR of main CCE collection with at the SINR that assists the CCE collection;

Said device also comprises acquisition module, is used in said sub-district master CCE collection and auxilliary CCE collection, searching the PDCCH Candidate Set, obtains the major-minor alternative AL collection { AL} of said community user respectively; And according to the major-minor alternative AL collection { AL} of the said community user that obtains; Corresponding target door limit value

is wherein on major-minor CCE collection to obtain said community user respectively; In the said target door limit value ; AL belongs to said major-minor alternative AL collection, and { AL}, DCI are the type of Downlink Control Information DCI;

Said acquisition module also is used for, the SINR of more said main CCE collection and said said target door limit value corresponding on main CCE collection

The SINR of more said auxilliary CCE collection and said at the target door limit value of assisting correspondence on the CCE collection When satisfying inequality

Obtaining AL respectively is the last AL that supports of SINR of said main CCE collection and auxilliary CCE collection, and obtains the minimum AL of said user on said main CCE collection _Min, obtain the minimum AL of said user on said auxilliary CCE collection _Min

Preferably, said division module also is used for, and according to the said sub-district RSRP of said reporting of user the user in the said sub-district is divided into said Cell Edge User and said Cell Center User;

Said resource distribution module specifically comprises judges submodule and distribution sub module;

When said user is Cell Edge User, according to the AL on said main CCE collection _MinOrder from small to large sorts to said Cell Edge User, and said judgement submodule is concentrated and belonged in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinSaid Cell Edge User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Edge User;

When said user is Cell Center User, according to the AL on said auxilliary CCE collection _MinOrder from small to large sorts to said Cell Center User, and said judgement submodule is concentrated and belonged in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinSaid Cell Center User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Center User.

Preferably, said resource distribution module also comprises judges submodule, distribution sub module and processing sub, and said judgement submodule specifically is used for, and judges whether to exist remaining main CCE fund-raising source or auxilliary CCE fund-raising source;

Judge at said judgement submodule and to have remaining main CCE fund-raising source; And when confirming to exist the Cell Center User in unallocated auxilliary CCE fund-raising source; Sort according to the Cell Center User of QoS priority order from high to low to said unallocated auxilliary CCE fund-raising source; Said judgement submodule is concentrated and is belonged in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinThe Cell Center User in said unallocated auxilliary CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Center User in next unallocated auxilliary CCE fund-raising source; Judge when said judgement submodule and not have remaining main CCE fund-raising source, and when confirming to have the Cell Center User in unallocated auxilliary CCE fund-raising source, said processing sub is blocked processing to the Cell Center User in said unallocated auxilliary CCE fund-raising source;

Judge when said judgement submodule and to have remaining auxilliary CCE fund-raising source; And when confirming to exist the Cell Edge User in unallocated main CCE fund-raising source; Sort according to the Cell Edge User of QoS priority order from high to low to said unallocated main CCE fund-raising source; Said judgement submodule is concentrated and is belonged in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinThe Cell Edge User in said unallocated main CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Edge User in next unallocated main CCE fund-raising source; Judge when said judgement submodule and not have remaining auxilliary CCE fund-raising source, and when confirming to have the Cell Edge User in unallocated main CCE fund-raising source, said processing sub is blocked processing to the Cell Edge User in said unallocated main CCE fund-raising source;

Said QoS grade is one or more in said user's propagation delay time requirement, the fairness parameter.

With the prior art contrast, technical scheme provided by the invention has the following advantages:

Channel conditions according to the user is selected appropriate C CE size for each user; For edge customer distributes main CCE fund-raising source, distribute auxilliary CCE fund-raising source for central user, satisfied the reliability of user PDCCH transmission; And practiced thrift the CCE resource; Guarantee to insert more user to improve the bearing capacity of PDCCH channel, guaranteed the reliability of edge customer PDCCH transmission, and satisfied user's QoS demand.

Description of drawings

In order to be illustrated more clearly in the present invention or technical scheme of the prior art; To do simple the introduction to the accompanying drawing of required use in the present invention or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the corresponding CCE position view of PDCCH Candidate Set in the prior art;

Fig. 2 provides a kind of schematic flow sheet of method of PDCCH resource allocation for the embodiment of the invention one;

Fig. 3 provides a kind of schematic flow sheet of method of PDCCH resource allocation for the embodiment of the invention two;

Fig. 4 is that the major-minor CCE collection in sub-district provided by the invention is divided and the power setting sketch map;

Fig. 5 provides a kind of schematic flow sheet of method of PDCCH resource allocation for the embodiment of the invention three;

Fig. 6 provides a kind of schematic flow sheet of method of PDCCH resource allocation for the embodiment of the invention four;

Fig. 7 provides a kind of structural representation of device of PDCCH resource allocation for the embodiment of the invention.

Embodiment

Core concept of the present invention is: with the PDCCH resource division is a plurality of control channels unit CCE collection; And be cell configuration master CCE collection and auxilliary CCE collection according to a plurality of CCE collection of dividing; Cell Edge User is distributed in main CCE fund-raising source, will be assisted CCE fund-raising source and distribute to Cell Center User.

To combine the accompanying drawing among the present invention below, the technical scheme among the present invention is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.

The present invention implement one a kind of PDCCH resource allocation is provided method, be applied to comprise in the communication system of a plurality of sub-districts, be that Cell Edge User in a plurality of sub-districts or Cell Center User distribute the PDCCH resource, as shown in Figure 2, method may further comprise the steps:

Step s201, dividing the PDCCH resource is a plurality of CCE collection;

Step s202 is cell configuration master CCE collection and auxilliary CCE collection according to a plurality of CCE collection;

Step s203 distributes to Cell Edge User with main CCE fund-raising source, will assist CCE fund-raising source and distribute to Cell Center User.

The application of the invention has improved the bearing capacity of PDCCH Channel Transmission, has guaranteed the reliability of edge customer PDCCH transmission, and has satisfied user's QoS demand.

The embodiment of the invention two provides a kind of method of PDCCH resource allocation, is applied in the LTE system PDCCH resource distributed, and is Cell Edge User in a plurality of sub-districts or Cell Center User distribution PDCCH resource.Said LTE system comprises: the communication system of other types such as TD-LTE (Time Division-LTE, time-division-Long Term Evolution) system, FDD-LTE (Frequency Division Duplex-LTE, FDD-Long Term Evolution) system.As shown in Figure 3, this method may further comprise the steps:

Step s301 divides PDCCH resource in the current subframe.

Concrete; Confirm to be used for the demand percentage of this each cell edge resource of PDCCH transmission according to the cell edge region blocking rate of a last subframe PDCCH; And PDCCH resource in the current subframe is divided into the disjoint CCE set of n according to this demand percentage, wherein n is the number of sub-district in the cell group.Wherein, the PDCCH resource is meant PDCCH USS partial C CE resource.

For example; When the cell edge region blocking rate of a last subframe PDCCH is higher; Explanation has that more fringe region user is unallocated to have caused high blocking rate to the PDCCH resource when a last subframe PDCCH resource allocation, promptly the edge resource demand of respective cell is bigger; When current subframe PDCCH resource division, the demand percentage of raising respective cell edge resource that can be suitable; Similarly, when the cell edge region blocking rate of a last subframe PDCCH hangs down, when cell edge region has a large amount of PDCCH resources not to be assigned with, can suitably reduce the demand percentage of respective cell edge resource.

Need to prove; In embodiments of the present invention; More than the cell edge region blocking rate of a subframe PDCCH measure as a reference the PDCCH resource divided; And adjust each sub-district CCE collection size neatly, and realized load state adjustment PDCCH resource division according to each sub-district in the cell group, improved the local resource utilance.

According to above-mentioned PDCCH resource dividing method, the CCE that divides in n the disjoint CCE collection that obtains can be continuous CCE, or discrete CCE.When the sequence number of CCE in the CCE set was arranged continuously, the CCE that arranges continuously in the CCE collection constituted the CCE continuation subset, it is understandable that, possibly comprise a plurality of CCE continuation subsets in the CCE set.

Step s302 is the major-minor CCE collection of each cell allocation.

From n disjoint CCE set, select the main CCE collection of a CCE collection corresponding as this sub-district with this cell edge resource requirement ratio; The main CCE collection that different districts distributes does not overlap mutually, distributes to the auxilliary CCE collection of the interior individual CCE collection of residue (n-1) of cell group as this sub-district.Promptly in a cell group with n sub-district, there are 1 main CCE collection and (n-1) individual auxilliary CCE collection in each sub-district.

Step s303 is provided with the transmitting power of sub-district master CCE collection and auxilliary CCE collection.

Behind each cell allocation master CCE collection and auxilliary CCE collection, the transmitting power that sub-district master CCE concentrates each CCE is set, the transmitting power that the auxilliary CCE in sub-district concentrates each CCE is set.

Concrete, for each sub-district, the transmitting power that this sub-district master CCE collection is set is higher than the transmitting power of the auxilliary CCE collection in this sub-district.Concentrate at main CCE collection and auxilliary CCE; The CCE that is provided with in the CCE continuation subset has identical power; The CCE that belongs in the different CCE continuation subsets can have different power, and the power maximum of the power minimum of the concentrated different CCE continuation subsets of main CCE greater than the concentrated different CCE continuation subsets of auxilliary CCE is set.

In cellular mobile system; When the big or small n of cell group got representative value 3, the division of each sub-district master CCE and auxilliary CCE was shown in Fig. 4 (a), and corresponding power setting is shown in Fig. 4 (b); Wherein, The main CCE collection of the grid respective cell of shading sign (slanted bar, netted and point-like), the auxilliary CCE collection of white background grid respective cell, ordinate is represented the power of CCE continuation subset in Fig. 4 (b).Main CCE collection and auxilliary CCE collection do not overlap mutually, and the transmitting power that main CCE collection is set is higher than the transmitting power of auxilliary CCE collection, and the CCE in the CCE continuation subset is provided with identical power, and the CCE in the different CCE continuation subsets is provided with different power.

Step s304, the RSRP (ReferenceSignal Received Power, Reference Signal Received Power) of reception user this sub-district of measurement and report and adjacent sub-district.

Step s305 confirms the SINR (Signal toInterference plus Noise Ratio, Signal to Interference plus Noise Ratio) of user on main CCE collection and auxilliary CCE collection.

Obtain the transmission performance of user on main CCE collection and auxilliary CCE collection in the sub-district according to CCE transmitting power in the main CCE collection of distributing to the sub-district and auxilliary CCE collection and the major-minor CCE collection.Be that example describes with the SINR of user on main CCE collection and auxilliary CCE collection below.

Concrete, be example with the ratio SINR of user r in the calculation plot k on the 1st CCE continuation subset:

Calculate the PL (PathLoss, path loss) between user and this cell base station and the adjacent base station according to the RSRP of reporting of user, the following expression formula of power division situation substitution of the cell group that sub-district k is belonged to:

${\mathrm{SINR}}_l^k=P_{k,l}.P{L}_k/(\underset{m=1,m\≠k}{\overset{n}{\mathrm{\Σ}}}{P}_{m,l}.{\mathrm{PL}}_m+N_0)$

Obtain the SINR of user r on corresponding CCE continuation subset.Wherein, P _{K, 1}Be the power that sub-district k distributes to the 1st CCE continuation subset, P _{M, 1}Be the power that other cell allocation are given this CCE continuation subset in the cell group, N ₀The expression noise power.

According to the above-mentioned process of obtaining the SINR on the CCE continuation subset, travel through all CCE continuation subsets in the main and auxiliary CCE collection, obtain { the SINR_P} of this user on main CCE collection _rWith { the SINR_S} on the auxilliary CCE collection _r

Step s306 searches the PDCCH Candidate Set in sub-district master CCE collection and auxilliary CCE collection.

Concrete, in main CCE collection, search the PDCCH Candidate Set of user r according to formula (1) and (2), obtain the active and standby AL of the choosing collection { AL_P} of user r _rIn auxilliary CCE collection, search the PDCCH Candidate Set, obtain the auxilliary alternative AL collection { AL_S} of user r _r

When in main CCE collection or the auxilliary CCE collection during no alternative PDCCH Candidate Set, corresponding alternative AL collection is set for empty.

Step s307 obtains the corresponding target door limit value of DCI-AL combination.

Obtain the BLER performance curve of every kind of DCI-AL combination through link level simulation, wherein, the Downlink Control Information kind of DCI for sending comprises that scheduling is authorized, resource indication or modulation coding mode etc., and AL representes CCE combination grade, AL=1,2,4 or 8.

Concrete; Get the target door limit value of the corresponding SINR of 1%BLER as DCI-AL; And be expressed as

; { { AL_S}, { AL_P} is with { AL_S} is user's a major-minor alternative AL collection to subscript AL ∈ in DCI-AL target door limit value

for AL_P} or AL ∈.

Step s308 obtains user supported minimum AL on major-minor CCE collection.

Concrete, SINR and the step s307 of user on major-minor CCE collection that gets access to according to step s305 obtains the target door limit value

, at the DCI that confirms to issue to user r _rAfter the type, through { the SINR_P} of more main CCE collection _rWith the target door limit value

(AL _k∈ AL_P}), { SINR_S} of relatively auxilliary CCE collection _rWith the target door limit value

(AL _j∈ AL_S}) confirm the minimum AL that user r supports in the sub-district respectively on major-minor CCE collection.

When the SINR of user on major-minor CCE collection and corresponding target door limit value

Satisfy inequality

, obtain user supported minimum AL on main CCE collection, be designated as { AL_P _Min} _r, obtain user supported minimum AL on auxilliary CCE collection, be designated as { AL_S _Min} _r, wherein AL is the supported AL of SINR, the concrete value of surplus can be set according to conditions such as channel conditions.It is understandable that each user has an AL_P in the sub-district _MinWith an AL_S _Min

When the primary/secondary alternative AL collection of user r is empty, perhaps { SINR_P} _rCan't support { AL_P} _r, { SINR_S} _rCan't support { AL_S} _rIn any AL option, { AL_P is set _Min} _r, { AL_S _Min} _rBe zero.

Step s309 is divided into Cell Center User and Cell Edge User according to this sub-district RSRP of reporting of user with the user.

Step s310 is according to the AL_P that supports on the main CCE collection _MinOrder from small to large sorts and generates tabulation A, and initialization list A Cell Edge User.

Cell Edge User among the tabulation A is the AL_P that supports according on the main CCE collection _MinOrder is from small to large arranged, and tabulation A is carried out initialization process, makes tabulation A when index i=1, point to first user among the tabulation A.And according to AL_P among the tabulation A _MinSequencing from small to large is followed successively by Cell Edge User and distributes main CCE fund-raising source.

Step s311 concentrates and belongs in the CCE continuation subset of user PDCCH Candidate Set at the main CCE that distributes to the sub-district, judges whether the idle { AL_P that is of a size of _Min} _iThe CCE resource, if execution in step s312 then, otherwise execution in step s313.

In different PDCCH transmission courses; The main CCE collection of distributing to the sub-district changes; And in the PDCCH transmission, each user PDCCH Candidate Set is fixed, therefore when main CCE concentrates to Cell Edge User i distribution CCE resource; This CCE resource must be in user PDCCH Candidate Set scope, otherwise the user can't take this CCE resource and use this CCE resource transmission PDCCH descending control signaling.The CCE resource of promptly distributing to the user is the continuous CCE subclass that main CCE concentrates, and this continuous CCE subclass belongs to the PDCCH Candidate Set of user i.

Step s312 is with { AL_P _Min} _iUser i is given in corresponding main CCE resource allocation, and identifies this CCE resource identification and be " occupying ", execution in step 314.

Step s313 inserts user i among the tabulation C execution in step s314.

Step s314 judges whether the Cell Edge User of wanting among the traversal of lists A, is execution in step s316 then, otherwise execution in step s315.

Step s315, the i=i+1 of renewal tabulation A points to next user among the tabulation A, and returns execution in step s310.

Step s316 is according to the AL_S that supports on the auxilliary CCE collection _MinOrder from small to large sorts and generates tabulation B, and initialization list B Cell Center User.

Cell Center User among the tabulation B is the AL_S that supports according on the auxilliary CCE collection _MinOrder is from small to large arranged, and tabulation B is carried out initialization process, makes tabulation B when index j=1, point to first user among the tabulation B, and according to AL_S among the tabulation B _MinSequencing from small to large is followed successively by Cell Center User and distributes auxilliary CCE fund-raising source.

Step s317, auxilliary CCE concentrates and belongs in the CCE continuation subset of user PDCCH Candidate Set in the sub-district, judges whether the idle { AL_S that is of a size of _Min} _jAuxilliary CCE resource, be execution in step s318 then, otherwise execution in step s319.

Step s318 is with { AL_S _Min} _jUser j is given in the auxilliary resource allocation of corresponding CCE, and the said CCE resource that sign is distributed to user j is " occupying ", execution in step s320.

The CCE resource of distributing to user j is that auxilliary CCE concentrates continuous CCE subclass, and this continuous CCE collection belongs to the PDCCH Candidate Set of user j.

Step s319 inserts user j among the tabulation D execution in step s320.

Step s320 judges whether the Cell Center User of wanting among the traversal of lists B, is execution in step s322 then, otherwise execution in step s321.

Step s321, the j=j+1 of renewal tabulation B points to next user among the tabulation B, and execution in step s316.

Step s322 judges the CCE resource that whether has residue not to be assigned with in the major-minor CCE collection in sub-district, if the CCE resource that does not have residue not to be assigned with, execution in step s323, otherwise, execution in step s324.

According to step s310-step s315 is the main CCE resource that Cell Edge User distributes this sub-district; According to step s316-step s321 is the auxilliary CCE resource that Cell Center User distributes this sub-district; Traversal Cell Edge User and Cell Center User, and generate tabulation C and tabulation D, wherein; Tabulation C is the set about the Cell Edge User in unallocated main CCE fund-raising source, and tabulation D is the set about the Cell Center User in unallocated auxilliary CCE fund-raising source.

Inward flange user and central user are when all correspondence has been distributed major-minor CCE fund-raising source in the sub-district, and tabulation C and tabulation D be empty, accomplish resource allocation process, need not to carry out the secondary resource distribution.

When tabulation C is not sky; Then edge customer is all distributed in this sub-district master CCE fund-raising source; And when still having the edge customer in unallocated main CCE fund-raising source; For carrying out secondary resource, distributes the edge customer among the tabulation C, and concrete, for the edge customer among the tabulation C distributes the unappropriated auxilliary CCE fund-raising of residue source; When tabulation D is not sky; Then central user is all distributed in the auxilliary CCE fund-raising in this sub-district source; And still have the central user in unallocated auxilliary CCE fund-raising source, carry out secondary resource for the central user among the tabulation D and distribute, for the central user among the tabulation D is distributed the unappropriated main CCE fund-raising of residue source.Divide timing carrying out secondary resource, need to guarantee have residue unappropriated main CCE fund-raising source or auxilliary CCE fund-raising source, therefore in this step, judge whether the major-minor CCE resource that is not assigned with.Certainly; Can judge at first also whether tabulation C is empty; When judging tabulation C not for sky; Judge that more auxilliary CCE concentrates the CCE resource that whether has residue not to be assigned with, distribute auxilliary CCE fund-raising source for the Cell Edge User among the tabulation C when having only the auxilliary CCE fund-raising source that existence is not assigned with, D can similarly obtain for tabulation; Perhaps, judged whether remaining CCE resource, judged whether tabulation is that sky is carried out simultaneously that concrete sequencing changes does not influence protection scope of the present invention.

Step s323 does not carry out the secondary resource assigning process.

Do not remain unappropriated major-minor CCE resource judging; Can not provide resource to distribute for the community user among tabulation D or the tabulation C to carry out secondary resource; Therefore; User among tabulation D or the tabulation C blocks processing, promptly in current subframe PDCCH transmission, no longer distributes the CCE resource for the community user among tabulation D or the tabulation C.

Step s324 carries out the secondary resource assigning process.

Concrete, divide two kinds of situation to describe:

1, in judging sub-district master CCE collection, exist when remaining the CCE resource that is not assigned with, explain that all Cell Edge User have all distributed the resource of main CCE collection, tabulation C is empty.At this moment, when tabulation D is not sky, distribute the main CCE fund-raising source that is not assigned with for the Cell Center User among the tabulation D.

2, in judging the auxilliary CCE collection in sub-district, exist when remaining the CCE resource that is not assigned with, explain that all Cell Center User have all distributed the resource of auxilliary CCE collection, tabulation D is empty.At this moment, when tabulation C is not sky, distribute the auxilliary CCE fund-raising source that is not assigned with for the Cell Edge User among the tabulation C.

Need to prove, in the embodiment of the invention, for edge customer distributes main CCE fund-raising source; For central user is distributed auxilliary CCE fund-raising source; Concrete, for each user selects appropriate C CE size, satisfied the reliability that user PDCCH transmits according to user's channel conditions; And practiced thrift the CCE resource, guarantee to insert more user to improve the bearing capacity of PDCCH channel.

The application of the invention has improved the bearing capacity of PDCCH Channel Transmission, has guaranteed the reliability of edge customer PDCCH transmission, and has satisfied user's QoS demand

The embodiment of the invention three provides a kind of method of PDCCH resource allocation, wherein, Cell Edge User is carried out secondary resource distribute, and as shown in Figure 5, this method may further comprise the steps:

Step s501 when the CCE resource that has residue not to be assigned with in the auxilliary CCE collection, judges whether tabulation C is empty; When tabulation C is sky; All Cell Edge User have all distributed the resource of main CCE collection, and need not to carry out secondary resource and distribute, otherwise execution in step s502.

In that being carried out secondary resource, Cell Edge User divides timing; The auxilliary CCE fund-raising source of distributing to Cell Edge User is for remaining the auxilliary CCE resource that is not assigned with in the first time in the resource allocation process; Therefore; Need to prove that in embodiments of the present invention, the auxilliary CCE fund-raising source that is proposed is for remaining the auxilliary CCE resource that is not assigned with in the first time in the resource allocation process.

Step s502 resequences to the Cell Edge User among the tabulation C according to delay requirement order from high to low, and initialization list C.

Cell Edge User among the tabulation C is to arrange according to customer service delay requirement order from high to low, and tabulation C is carried out initialization process, makes tabulation C when all k=1, point to first user among the tabulation C, and according to AL_S among the tabulation C _MinSequencing from small to large is followed successively by Cell Edge User and distributes auxilliary CCE fund-raising source.

Step s503, auxilliary CCE concentrates and belongs in the CCE continuation subset of user PDCCH Candidate Set in the sub-district, judges whether the idle { AL_S that is of a size of _Min} _kThe CCE resource, be execution in step s504 then, otherwise execution in step s505.

Step s504 is with { AL_S _Min} _kUser k is given in corresponding auxilliary CCE resource allocation, and this CCE resource that sign is distributed to user k is " occupying ", execution in step s506.

Step s505 blocks processing to user k.

Distribute in that the Cell Edge User of tabulation among the C carried out secondary resource, concentrating and belong in the CCE continuation subset of user PDCCH Candidate Set at the auxilliary CCE in sub-district does not have the idle { AL_S that is of a size of _Min} _kAuxilliary CCE resource allocation when giving user k, user k is blocked processing, promptly in current PDCCH transmission course, no longer be user k distribution CCE resource.

Step s506 judges whether all Cell Edge User among the traversal of lists C, is process ends then, otherwise execution in step s507.

Step s507, the k=k+1 of renewal tabulation C points to next user in the tabulation, and returns execution in step s503.

Process ends.

Need to prove; In embodiments of the present invention; Be respectively Cell Edge User and Cell Center User and distribute major-minor CCE fund-raising source, all users in the traversal sub-district are if exist the CCE resource that is not assigned with; And when defining the community user of unallocated CCE resource; Delay requirement according to the user sorts to the user, and is that the community user of unallocated CCE resource distributes and implements the CCE resource that is not assigned with according to the priority of delay requirement, and the Cell Edge User that delay requirement is high, Cell Center User be preferential respectively to use auxilliary, main CCE collection residual resource; Can take into account user's time delay demand in the utilance that improves resource simultaneously, satisfy user's QoS demand.

The application of the invention has improved the bearing capacity of PDCCH Channel Transmission, has guaranteed the reliability of edge customer PDCCH transmission, and has satisfied user's QoS demand.

The embodiment of the invention four provides a kind of method of PDCCH resource allocation, wherein, Cell Center User is carried out secondary resource distribute, and as shown in Figure 6, this method may further comprise the steps:

Step s601 when the CCE resource that has residue not to be assigned with in the main CCE collection, judges whether tabulation D is empty; When tabulation D is sky; All Cell Center User have all distributed the resource of main CCE collection, and need not to carry out secondary resource and distribute, otherwise execution in step s602.

In that being carried out secondary resource, Cell Center User divides timing; The main CCE fund-raising source of distributing to Cell Center User is for remaining the main CCE resource that is not assigned with in the first time in the resource allocation process; Therefore; Need to prove that in embodiments of the present invention, the main CCE fund-raising source that is proposed is for remaining the main CCE resource that is not assigned with in the first time in the resource allocation process.

Step s602 resequences to the Cell Center User among the tabulation D according to delay requirement order from high to low, and initialization list D.

Cell Center User among the tabulation D is to arrange according to customer service delay requirement order from high to low, and tabulation D is carried out initialization process, makes tabulation D when all n=1, point to first user among the tabulation D, and according to AL_P among the tabulation D _MinSequencing from small to large is followed successively by Cell Edge User and distributes main CCE fund-raising source.

Step s603 concentrates and belongs in the CCE continuation subset of user PDCCH Candidate Set at sub-district master CCE, judges whether the idle { AL_P that is of a size of _Min} _nThe CCE resource, be execution in step s604 then, otherwise execution in step s605.

Step s604 is with { AL_P _Min} _nUser n is given in corresponding main CCE resource allocation, and this CCE resource that sign is distributed to user n is " occupying ", execution in step s605.

Step s605 blocks processing to user n.

Distribute in that the Cell Center User of tabulation among the D carried out secondary resource, concentrating and belong in the CCE continuation subset of user PDCCH Candidate Set at sub-district master CCE does not have the idle { AL_P that is of a size of _Min} _nMain CCE resource allocation when giving user n, user n is blocked processing, promptly in current PDCCH transmission course, no longer be user n distribution CCE resource.

Step s606 judges whether all Cell Edge User among the traversal of lists D, is process ends then, otherwise execution in step s607.

Step s607, the n=n+1 of renewal tabulation D points to next user in the tabulation, and returns execution in step s603.

Process ends.

The method of the PDCCH resource allocation that the application of the invention provides has improved the bearing capacity of PDCCH Channel Transmission, has guaranteed the reliability of edge customer PDCCH transmission, and has satisfied user's QoS demand.

The embodiment of the invention five provides a kind of device of PDCCH resource allocation, is applied to comprise in the communication system of a plurality of sub-districts, is Cell Edge User in a plurality of sub-districts or Cell Center User distribution PDCCH resource, and as shown in Figure 7, this device comprises:

Divide module 10, being used to divide the PDCCH resource is a plurality of CCE collection;

Configuration module 20 is used for dividing a plurality of CCE collection that obtain according to dividing module 10, is cell configuration master CCE collection and auxilliary CCE collection;

Resource distribution module 30 is used for being cell configuration master CCE collection and auxilliary CCE collection according to configuration module 20, and Cell Edge User is distributed in main CCE fund-raising source, will assist CCE fund-raising source and distribute to Cell Center User.

Wherein, Dividing module 10 specifically is used for; Each the cell edge resource requirement ratio that is used for current PDCCH transmission according to the cell edge blocking rate estimation of last subframe PDCCH transmission; And be n disjoint CCE collection according to demand percentage with the PDCCH resource division, n is the number of sub-district in the cell group;

Configuration module 20 specifically is used for, and is the main CCE collection of CCE collection of cell allocation as the sub-district, and the main CCE collection of distributing to different districts in the cell group does not overlap mutually; Distribute to the auxilliary CCE collection of (n-1) individual CCE collection of other users in the cell group as the sub-district;

This device also comprises module 40 is set, and is used to be provided with the transmitting power that sub-district master CCE collection and auxilliary CCE concentrate each CCE, and the transmitting power that main CCE collection is set is higher than the transmitting power of auxilliary CCE collection; The identical transmitting power of CCE in the CCE continuation subset is set, and the CCE that belongs in the different CCE continuation subsets has distinct transmit power.

This device also comprises computing module 50, is used for according to the sub-district and the RSRP of adjacent sub-district and the transmitting power of sub-district master CCE collection and auxilliary CCE collection that receive, and the calculation plot user is at the SINR of main CCE collection with at the SINR that assists the CCE collection respectively;

This device also comprises acquisition module 60, is used in sub-district master CCE collection and auxilliary CCE collection, searching the PDCCH Candidate Set, obtains the major-minor alternative AL collection { AL} of community user respectively; And according to the major-minor alternative AL collection { AL} of the community user that obtains; Obtain the target door limit value

of community user correspondence on major-minor CCE collection respectively; Wherein, In the target door limit value ; AL belongs to major-minor alternative AL collection, and { AL}, DCI are the type of Downlink Control Information DCI;

Acquisition module 60 also is used for, the community user that calculates through computing module 50 relatively the SINR of main CCE collection and on main CCE collection corresponding target door limit value , the community user that calculates through computing module 50 relatively the SINR of auxilliary CCE collection and on auxilliary CCE collection corresponding target door limit value

When satisfying inequality

, obtaining AL respectively is the last AL that supports of SINR of main CCE collection and auxilliary CCE collection, and obtains the minimum AL of user on main CCE collection _Min, obtain the minimum AL of user on auxilliary CCE collection _Min

Wherein, divide module 10 and also be used for, the user in the sub-district is divided into Cell Edge User and Cell Center User according to the sub-district RSRP of reporting of user;

Wherein, resource distribution module 30 specifically comprises judgement submodule 31 and distribution sub module 32;

When the user is Cell Edge User, according to the AL on main CCE collection _MinOrder from small to large sorts to Cell Edge User, judges that submodule 31 concentrates and belong in the CCE continuation subset of Cell Edge User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of AL _MinIdle CCE resource, when judged result when being, distribution sub module 32 is with AL _MinCell Edge User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Edge User;

When the user is Cell Center User, according to the AL on auxilliary CCE collection _MinOrder from small to large sorts to Cell Center User, judges that submodule 31 concentrates and belong in the CCE continuation subset of Cell Center User PDCCH Candidate Set at auxilliary CCE, judges whether that existence is of a size of AL _MinIdle CCE resource, when judged result when being, distribution sub module 32 is with AL _MinCell Center User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Center User.

Wherein, resource distribution module 30 also comprises judges submodule 31, distribution sub module 32 and processing sub 33, judges that submodule 31 specifically is used for, and judges whether to exist remaining main CCE fund-raising source or auxilliary CCE fund-raising source;

There is remaining main CCE fund-raising source judging that submodule 31 is judged; And when confirming to exist the Cell Center User in unallocated auxilliary CCE fund-raising source; Sort according to the Cell Center User of QoS priority order from high to low to unallocated auxilliary CCE fund-raising source; Judge that submodule 31 concentrates and belong in the CCE continuation subset of Cell Center User PDCCH Candidate Set at main CCE, judge whether to exist to be of a size of AL _MinIdle CCE resource, when judged result when being, distribution sub module 32 is with AL _MinThe Cell Center User in unallocated auxilliary CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Center User in next unallocated auxilliary CCE fund-raising source; Do not have remaining main CCE fund-raising source when judging that submodule 31 is judged, and when confirming to have the Cell Center User in unallocated auxilliary CCE fund-raising source, the Cell Center User in 33 pairs of unallocated auxilliary CCE fund-raisings of processing sub source blocks processing;

There is remaining auxilliary CCE fund-raising source when judging that submodule 31 is judged; And when confirming to exist the Cell Edge User in unallocated main CCE fund-raising source; Sort according to the Cell Edge User of QoS priority order from high to low to unallocated main CCE fund-raising source; Judge that submodule 31 concentrates and belong in the CCE continuation subset of Cell Edge User PDCCH Candidate Set at auxilliary CCE, judge whether that existence is of a size of AL _MinIdle CCE resource, when judged result when being, distribution sub module 32 is with AL _MinThe Cell Edge User in unallocated main CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Edge User in next unallocated main CCE fund-raising source; Do not have remaining auxilliary CCE fund-raising source when judging that submodule 31 is judged, and when confirming to have the Cell Edge User in unallocated main CCE fund-raising source, the Cell Edge User in 33 pairs of unallocated main CCE fund-raisings of processing sub source blocks processing;

Wherein, the QoS grade is for user's propagation delay time requires, in the fairness parameter one or more.

The device of the PDCCH resource allocation that the application of the invention embodiment provides has improved the bearing capacity of PDCCH Channel Transmission, has guaranteed the reliability of edge customer PDCCH transmission, and has satisfied user's QoS demand.

Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.

Claims (10)

1. the method for a physical downlink control channel PDCCH resource allocation; It is characterized in that; Be applied to comprise in the communication system of a plurality of sub-districts, be Cell Edge User in said a plurality of sub-districts or Cell Center User distribution PDCCH resource, said method comprising the steps of:

Each the cell edge resource requirement ratio that is used for current PDCCH transmission according to the cell edge blocking rate estimation of last subframe PDCCH transmission; And be n disjoint CCE collection according to said demand percentage with said PDCCH resource division, n is the number of sub-district in the cell group;

Be the main CCE collection of said CCE collection of said cell allocation as said sub-district, the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to the auxilliary CCE collection of (n-1) individual CCE collection of other users in the said cell group as said sub-district;

Said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source.

2. the method for claim 1 is characterized in that, is being the main CCE collection of said CCE collection of said cell allocation as said sub-district, and the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to after other users' in the said cell group the auxilliary CCE collection of (n-1) individual CCE collection, also comprise as said sub-district:

The transmitting power that said sub-district master CCE collection and auxilliary CCE concentrate each CCE is set, and the transmitting power that said main CCE collection is set is higher than the transmitting power of said auxilliary CCE collection; The identical transmitting power of CCE in the CCE continuation subset is set, and the CCE that belongs in the different CCE continuation subsets has distinct transmit power.

3. method as claimed in claim 2 is characterized in that, said Cell Edge User is distributed in said main CCE fund-raising source, and said Cell Center User is distributed in said auxilliary CCE fund-raising source, also comprises before:

According to the transmitting power of Reference Signal Received Power RSRP and the said sub-district master CCE collection and the auxilliary CCE collection of said sub-district that receives and adjacent sub-district, calculate said community user respectively at the Signal to Interference plus Noise Ratio SINR of main CCE collection with at the SINR of auxilliary CCE collection;

In said sub-district master CCE collection and auxilliary CCE collection, search the PDCCH Candidate Set, obtain the major-minor alternative AL collection { AL} of said community user respectively; Major-minor alternative AL collection { AL} according to the said community user that obtains; Corresponding target door limit value

is wherein on major-minor CCE collection to obtain said community user respectively; In the said target door limit value

; AL belongs to said major-minor alternative AL collection, and { AL}, DCI are the type of Downlink Control Information DCI;

The SINR of more said main CCE collection and said target door limit value corresponding on main CCE collection The SINR of more said auxilliary CCE collection and said at the target door limit value of assisting correspondence on the CCE collection

When satisfying inequality Obtaining AL respectively is the last AL that supports of SINR of said main CCE collection and auxilliary CCE collection, and obtains the minimum AL of said user on said main CCE collection _Min, obtain the minimum AL of said user on said auxilliary CCE collection _Min

4. method as claimed in claim 3 is characterized in that, according to the said sub-district RSRP of said reporting of user the user in the said sub-district is divided into said Cell Edge User and said Cell Center User;

Said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source, specifically comprise:

When said user is Cell Edge User, according to the AL on said main CCE collection _MinOrder from small to large sorts to said Cell Edge User, concentrates and belongs in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinSaid Cell Edge User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Edge User;

When said user is Cell Center User, according to the AL on said auxilliary CCE collection _MinOrder from small to large sorts to said Cell Center User, concentrates and belongs in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinSaid Cell Center User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Center User.

5. method as claimed in claim 4; It is characterized in that; Said Cell Edge User is distributed in said main CCE fund-raising source, said Cell Center User is distributed in said auxilliary CCE fund-raising source, also comprise afterwards judging whether to exist remaining main CCE fund-raising source or auxilliary CCE fund-raising source;

There is remaining main CCE fund-raising source when judging; And when confirming to exist the Cell Center User in unallocated auxilliary CCE fund-raising source; Sort according to the Cell Center User of service quality QoS priority order from high to low to said unallocated auxilliary CCE fund-raising source; Concentrate and belong in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at main CCE, judge whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinThe Cell Center User in said unallocated auxilliary CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Center User in next unallocated auxilliary CCE fund-raising source; There is not remaining main CCE fund-raising source when judging, and when confirming to have the Cell Center User in unallocated auxilliary CCE fund-raising source, the Cell Center User in said unallocated auxilliary CCE fund-raising source is blocked processing;

There is remaining auxilliary CCE fund-raising source when judging; And when confirming to exist the Cell Edge User in unallocated main CCE fund-raising source; Sort according to the Cell Edge User of QoS priority order from high to low to said unallocated main CCE fund-raising source; Concentrate and belong in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at auxilliary CCE, judge whether to exist to be of a size of said AL _MinIdle CCE resource, if having with said AL _MinThe Cell Edge User in said unallocated main CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Edge User in next unallocated main CCE fund-raising source; There is not remaining said auxilliary CCE fund-raising source when judging, and when confirming to have the Cell Edge User in unallocated said main CCE fund-raising source, the Cell Edge User in said unallocated main CCE fund-raising source is blocked processing;

Said QoS grade is one or more in said user's propagation delay time requirement, the fairness parameter.

6. the device of a physical downlink control channel PDCCH resource allocation is characterized in that, is applied to comprise in the communication system of a plurality of sub-districts, is Cell Edge User in a plurality of sub-districts or Cell Center User distribution PDCCH resource, and this device comprises:

Divide module; Be used for being used for each cell edge resource requirement ratio of current PDCCH transmission according to the cell edge blocking rate estimation of last subframe PDCCH transmission; And be n disjoint CCE collection according to said demand percentage with said PDCCH resource division, n is the number of sub-district in the cell group;

Configuration module is used for said a plurality of CCE collection of obtaining according to said division Module Division, is the main CCE collection of said CCE collection of said cell allocation as said sub-district, and the main CCE collection of distributing to different districts in the said cell group does not overlap mutually; Distribute to the auxilliary CCE collection of (n-1) individual CCE collection of other users in the said cell group as said sub-district;

Resource distribution module is used for said Cell Edge User is distributed in said main CCE fund-raising source, and said Cell Center User is distributed in said auxilliary CCE fund-raising source.

7. device as claimed in claim 6; It is characterized in that; Said device also comprises module is set, and is used to be provided with the transmitting power that said sub-district master CCE collection and auxilliary CCE concentrate each CCE, and the transmitting power that said main CCE collection is set is higher than the transmitting power of said auxilliary CCE collection; The identical transmitting power of CCE in the CCE continuation subset is set, and the CCE that belongs in the different CCE continuation subsets has distinct transmit power.

8. device as claimed in claim 7; It is characterized in that; Said device also comprises computing module; Be used for according to the said sub-district and the RSRP of adjacent sub-district and the transmitting power of said sub-district master CCE collection and auxilliary CCE collection that receive, calculate said community user respectively at the SINR of main CCE collection with at the SINR that assists the CCE collection;

Said device also comprises acquisition module, is used in said sub-district master CCE collection and auxilliary CCE collection, searching the PDCCH Candidate Set, obtains the major-minor alternative AL collection { AL} of said community user respectively; And according to the major-minor alternative AL collection { AL} of the said community user that obtains; Corresponding target door limit value is wherein on major-minor CCE collection to obtain said community user respectively; In the said target door limit value

; AL belongs to said major-minor alternative AL collection, and { AL}, DCI are the type of Downlink Control Information DCI;

Said acquisition module also is used for, the SINR of more said main CCE collection and said said target door limit value corresponding on main CCE collection The SINR of more said auxilliary CCE collection and said at the target door limit value of assisting correspondence on the CCE collection

When satisfying inequality

Obtaining AL respectively is the last AL that supports of SINR of said main CCE collection and auxilliary CCE collection, and obtains the minimum AL of said user on said main CCE collection _Min, obtain the minimum AL of said user on said auxilliary CCE collection _Min

9. device as claimed in claim 8 is characterized in that, said division module also is used for, and according to the said sub-district RSRP of said reporting of user the user in the said sub-district is divided into said Cell Edge User and said Cell Center User;

Said resource distribution module specifically comprises judges submodule and distribution sub module;

When said user is Cell Edge User, according to the AL on said main CCE collection _MinOrder from small to large sorts to said Cell Edge User, and said judgement submodule is concentrated and belonged in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinSaid Cell Edge User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Edge User;

When said user is Cell Center User, according to the AL on said auxilliary CCE collection _MinOrder from small to large sorts to said Cell Center User, and said judgement submodule is concentrated and belonged in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinSaid Cell Center User is given in corresponding CCE resource allocation, otherwise jumps to next Cell Center User.

10. device as claimed in claim 9; It is characterized in that; Said resource distribution module also comprises judges submodule, distribution sub module and processing sub, and said judgement submodule specifically is used for, and judges whether to exist remaining main CCE fund-raising source or auxilliary CCE fund-raising source;

Judge at said judgement submodule and to have remaining main CCE fund-raising source; And when confirming to exist the Cell Center User in unallocated auxilliary CCE fund-raising source; Sort according to the Cell Center User of QoS priority order from high to low to said unallocated auxilliary CCE fund-raising source; Said judgement submodule is concentrated and is belonged in the CCE continuation subset of said Cell Center User PDCCH Candidate Set at main CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinThe Cell Center User in said unallocated auxilliary CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Center User in next unallocated auxilliary CCE fund-raising source; Judge when said judgement submodule and not have remaining main CCE fund-raising source, and when confirming to have the Cell Center User in unallocated auxilliary CCE fund-raising source, said processing sub is blocked processing to the Cell Center User in said unallocated auxilliary CCE fund-raising source;

Judge when said judgement submodule and to have remaining auxilliary CCE fund-raising source; And when confirming to exist the Cell Edge User in unallocated main CCE fund-raising source; Sort according to the Cell Edge User of QoS priority order from high to low to said unallocated main CCE fund-raising source; Said judgement submodule is concentrated and is belonged in the CCE continuation subset of said Cell Edge User PDCCH Candidate Set at auxilliary CCE, judges whether to exist to be of a size of said AL _MinIdle CCE resource, when judged result when being, said distribution sub module is with said AL _MinThe Cell Edge User in said unallocated main CCE fund-raising source is given in corresponding CCE resource allocation, otherwise jumps to the Cell Edge User in next unallocated main CCE fund-raising source; Judge when said judgement submodule and not have remaining auxilliary CCE fund-raising source, and when confirming to have the Cell Edge User in unallocated main CCE fund-raising source, said processing sub is blocked processing to the Cell Edge User in said unallocated main CCE fund-raising source;

Said QoS grade is one or more in said user's propagation delay time requirement, the fairness parameter.

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