CN102264129B

CN102264129B - Method and device for distributing resources

Info

Publication number: CN102264129B
Application number: CN201010188547.0A
Authority: CN
Inventors: 朱剑驰; 佘小明; 陈岚
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2015-06-10
Anticipated expiration: 2030-05-31
Also published as: JP2011254467A; CN102264129A; JP5769500B2

Abstract

The invention provides a method for distributing resources. The method comprises the following steps: A, selecting one frequency domain resource unit in all of frequency domain resource units to be distributed; B, scheduling on the selected frequency domain resource unit, selecting a scheduling result in the scheduling result according to a corresponding relationship between recorded user equipment (UE) and a demodulating frequency reference signal (DM-RS) port, and ensuring that the DM-RS ports of all of the frequency domain resource units which are distributed to the same UE are the same; C, distributing a corresponding DM-RS port to the UE which has not been distributed with the corresponding DM-RS port according to the selected scheduling result, recording the corresponding relationship between the newly established UE and the DM-RS port, and then returning to step A until all of the frequency domain resource units are distributed. The invention further provides a device for distributing resources. The method and the device can be used for realizing scheduling of an LTE-A (long term evolution-Advanced) system.

Description

A kind of resource allocation methods and device

Technical field

The present invention relates to mobile communication technology, the resource allocation methods in Long Term Evolution (LTE-Advanced, the LTE-A) system particularly improved and device.

Background technology

Cellular mobile telephone brings great convenience to the communication of people, second generation global system for mobile communications (Global System for Mobile Communication, GSM) adopt digital communication technology, further increase the speech quality of mobile communication.Third generation partner program (3rd GenerationPartnership Project, 3GPP) as the vital tissue of moving communicating field, greatly promote G mobile communication (The Third Generation, Standardization 3G), formulate a series of Wideband Code Division Multiple Access (WCDMA) that comprises and access (Wide Code Division Multiple Access, WCDMA), high-speed slender body theory (High Speed Downlink Packet Access, HSDPA), high speed uplink packet access (High Speed Uplink Packet Access, etc. HSUPA) at interior communications system specifications.

In order to tackle the challenge of broadband access technology, and meet the demand of growing new business, 3GPP will start 3G Long Term Evolution (Long Term Evolution in the end of the year 2004, LTE) standardization effort of technology, wish to improve spectrum efficiency further, improve the performance of Cell Edge User, reduce system delay, for high velocity mobile users provides the access service etc. of higher rate.LTE (LTE-Advanced, the LTE-A) technology improved is especially on the basis of LTE technology, and several times increase spectral bandwidth, significantly improve data rate, for more mobile subscribers provide the service of higher rate, better performance.

Lte-a system supports multi-user's multiple-input and multiple-output (MU-MIMO) technology, namely lte-a system can dispatch multiple user (UE) on identical frequency spectrum resource simultaneously, that is, in lte-a system, multiple UE can share spectrum resources, such as Resource Block (RB, Resource Block) etc.Thus, how to complete Resourse Distribute, realizing user scheduling is that lte-a system needs one of key issue solved.

Summary of the invention

The invention provides a kind of resource allocation methods and device, to realize the MU-MIMO scheduling of lte-a system.

Resource allocation methods described in one embodiment of the invention comprises:

A, selects a frequency domain resource unit from all frequency domain resource units to be allocated;

B, selected frequency domain resource unit is dispatched, and according to the corresponding relation of the user equipment (UE) recorded and demodulated pilot signal DM-RS port, in scheduling result, select a scheduling result, ensure that the DM-RS port distributing to all frequency domain resource units of same UE is identical;

C, according to selected scheduling result, for the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port, and records the corresponding relation of newly-established UE and DM-RS port, then returns A, until distribute all frequency domain resource units.

Comprise taking a step forward of A of execution: A0, select the value of a Rank, and the Rank arranging all frequency domain resource units to be allocated is equal to this value;

Comprise further after execution C: D, record should the resource allocation result of Rank value, then return A0, until all obtain a resource allocation result to all possible Rank value, then perform E;

E, the resource allocation result of more corresponding different Rank value, the best allocation result of selectivity is as final resource allocation result; Wherein, describedly in selected frequency domain resource unit, carry out scheduling packets draw together: carry out SU-MIMO according to the value of selected Rank or/and MU-MIMO scheduling, wherein, the Rank sum of each UE of scheduling equals the value of selected Rank.

Above-mentioned B comprises:

A1, selected frequency domain resource unit carries out SU-MIMO or/and MU-MIMO scheduling, and obtains a scheduling result;

A2, judges whether there is DM-RS port collision between all UE be scheduled in this scheduling result according to the corresponding relation of UE and the DM-RS port recorded,

If there is DM-RS port collision, then think that the DM-RS port that described scheduling result can not ensure to distribute to all frequency domain resource units of same UE is identical, abandon this scheduling result, and return A1;

If there is no DM-RS port collision, then think that the DM-RS port that described scheduling result can ensure to distribute to all frequency domain resource units of same UE is identical, using described scheduling result as selected scheduling result.

The corresponding relation of UE and the DM-RS port recorded before carrying out Resourse Distribute is for empty.

Resource allocation methods described in another embodiment of the present invention comprises:

A, selects a frequency domain resource unit from all Resource Block frequency domain resource units to be allocated;

B, selected frequency domain resource unit is dispatched, and according to the corresponding relation of the user equipment (UE) recorded with demodulated pilot signal DM-RS port and the corresponding relation of UE corresponding Rank with it, a scheduling result is selected in scheduling result, ensure that the DM-RS port distributing to all frequency domain resource units of same UE is identical, ensure that the Rank distributing to all frequency domain resource units of same UE is identical simultaneously;

C, according to selected scheduling result, for the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port, and record the corresponding relation of newly-established UE and DM-RS port, for the Rank not having the UE of corresponding Rank to determine its correspondence, and record the corresponding relation of newly-established UE and Rank, then return A, until distribute all frequency domain resource units.

Above-mentioned B comprises:

B1, selected frequency domain resource unit carries out SU-MIMO or/and MU-MIMO scheduling, and obtains a scheduling result;

B2, judges whether there is DM-RS port collision between all UE be scheduled in this scheduling result according to the corresponding relation of UE and the DM-RS port recorded,

If there is DM-RS port collision, then think that the DM-RS port that described scheduling result can not ensure to distribute to all frequency domain resource units of same UE is identical, abandon this scheduling result, and return B1;

If there is no DM-RS port collision, then think that the DM-RS port that described scheduling result can ensure to distribute to all frequency domain resource units of same UE is identical, and perform B3;

B3, whether identical according to the Rank that this scheduling result and the UE that recorded and the corresponding relation of its corresponding Rank judge to have distributed to all frequency domain resource units of same UE,

If so, then using described scheduling result as selected scheduling result;

Otherwise, abandon this scheduling result, return B1.

Comprise for the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port: be that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port by ascending order, descending or random mode, ensure that DM-RS port corresponding to the different UEs of dispatching in selected frequency domain resource unit is different.

The corresponding relation recording newly-established UE and DM-RS port comprises: be respectively the DM-RS port register that each UE is configured for the record DM-RS port corresponding with this UE, record the corresponding relation of newly-established UE and DM-RS port.

Determine that for there is no the UE of corresponding Rank the Rank of its correspondence comprises: be the Rank not having the UE of corresponding Rank to determine correspondence according to the number of the UE dispatched in selected frequency domain resource unit.

The corresponding relation recording newly-established UE and Rank comprises: be respectively each UE and be configured for the record Rank register corresponding with this UE, record the corresponding relation of newly-established UE and Rank.

The corresponding relation of UE and the DM-RS port recorded before carrying out Resourse Distribute is for empty, and the corresponding relation of UE and the Rank of record is empty.

From all Resource Block frequency domain resource units to be allocated, a frequency domain resource unit is selected to comprise: from all frequency domain resource units to be allocated, select the frequency domain resource unit that weighted sum is the highest or priority is the highest or throughput is the highest; Or Stochastic choice frequency domain resource unit from all frequency domain resource units to be allocated.

The fair PF dispatching algorithm of above-mentioned scheduling adoption rate or poll RR dispatching algorithm or max carrier to interference MCI dispatching algorithm.

Embodiments of the invention additionally provide a kind of resource allocation device, comprising:

Resource selection module, for selecting a frequency domain resource unit from all Resource Block frequency domain resource units to be allocated, until distribute all frequency domain resource units;

User scheduling module, for dispatching in selected frequency domain resource unit, and according to the corresponding relation of the user equipment (UE) recorded and demodulated pilot signal DM-RS port, in scheduling result, select a scheduling result, ensure that the DM-RS port distributing to all frequency domain resource units of same UE is identical;

Corresponding relation logging modle, for being that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port according to selected scheduling result, and records the corresponding relation of newly-established UE and DM-RS port.

Above-mentioned corresponding relation logging modle comprises: be respectively the DM-RS port register for recording the DM-RS port corresponding with this UE that each UE configures.

Above-mentioned corresponding relation logging modle can further include: be respectively each UE configure for recording the Rank register corresponding with this UE; Wherein, user scheduling module for carrying out SU-MIMO in selected frequency domain resource unit or/and MU-MIMO scheduling, according to the user equipment (UE) recorded and the corresponding relation of demodulated pilot signal DM-RS port and the corresponding relation of UE and Rank, a scheduling result is selected in scheduling result, ensure that the DM-RS port distributing to all frequency domain resource units of same UE is identical, ensure that the Rank distributing to all frequency domain resource units of same UE is identical simultaneously.

Above-mentioned resource allocation device comprises further:

Rank arranges module, for from Rank likely select the value of a Rank in value, until all obtain a resource allocation result to all possible Rank value; And

Allocation result selects module, and for the resource allocation result of more corresponding different Rank value, and the best allocation result of selectivity is as final resource allocation result.

Above-mentioned frequency domain resource unit is Resource Block RB, subcarrier or subband.

Embodiments of the invention give the resource allocation methods and resource allocation device that are applicable to lte-a system, can realize the scheduling of lte-a system, at least meet DM-RS port this restrictive condition all identical distributing to all RB of same UE.

Accompanying drawing explanation

Fig. 1 is the resource allocation methods flow chart described in the embodiment of the present invention 1;

Fig. 2 is the resource allocation methods flow chart described in the embodiment of the present invention 2;

Fig. 3 is the resource allocation methods flow chart described in the embodiment of the present invention 3;

Fig. 4 is resource allocation device internal structure schematic diagram provided by the present invention;

Fig. 5 is another kind of resource allocation device internal structure schematic diagram provided by the present invention.

Embodiment

In lte-a system, except inheriting the common pilot signal (CRS of LTE version 8 (Rel-8) system definition, Common Reference Signal) outside, also introduce the pilot signal (RS that two classes are new, Reference Signal), comprising: channel condition information pilot signal (CSI-RS) and the demodulated pilot signal (DM-RS) for particular UE.Wherein, DM-RS is the pilot signal estimated for doing demodulated channel.The base station of lte-a system can be the DM-RS port on its RB distributed by the DM-RS port instructions field instruction UE in Physical Downlink Control Channel (PDCCH).

In lte-a system, the PDCCH due to each user corresponding on whole frequency band to be scheduled only has a DM-RS port instructions field, therefore, when carrying out Resourse Distribute, the DM-RS port at least needing all RB ensureing to distribute to same UE is identical.But, existingly be applied to single user multiple-input and multiple-output (SU-MIMO) in LTE system and MU-MIMO dispatching method does not consider above-mentioned restrictive condition when carrying out Resourse Distribute, therefore, need a kind of new resource allocation methods, to realize the scheduling of lte-a system.

Known in lte-a system, MU-MIMO can be divided into transparent MU-MIMO and nontransparent MU-MIMO two kinds by the transparency according to MU-MIMO.Wherein, transparent MU-MIMO refers to that UE can only be known for the information needed for demodulation its data, such as, be the total number (Rank) of data flow on its RB distributed, DM-RS port etc., and cannot be informed on same RB whether also there are other UE.That is, transparent MU-MIMO does not know self is SU-MIMO or MU-MIMO.For transparent MU-MIMO, when carrying out Resourse Distribute, only demand fulfillment distributes to the DM-RS port of all RB of same UE is this identical restrictive condition.In addition, nontransparent MU-MIMO refers to that UE is except knowing the information can also known except the information needed for demodulation its data and coexist in other UE on same RB, such as, be the Rank of the RB that it distributes, share DM-RS port of other UE of this RB etc.That is, nontransparent MU-MIMO can know self is SU-MIMO or MU-MIMO.Therefore, for nontransparent MU-MIMO, when dispatching, the DM-RS port distributing to all RB of same UE except demand fulfillment is except identical this restrictive condition (referred to as restrictive condition 1), and also needing to meet the Rank distributing to all RB of same UE is further identical this restrictive condition (referred to as restrictive condition 2).

To be described in detail respectively for SU-MIMO by specific embodiment below, the resource allocation methods of transparent MU-MIMO and nontransparent MU-MIMO.

Embodiment 1

Present embodiments provide a kind of for SU-MIMO or/and the resource allocation methods of transparent MU-MIMO, the scheduling of lte-a system can be realized.

As previously mentioned, for SU-MIMO or/and transparent MU-MIMO distribute RB time, the restriction of the above-mentioned restrictive condition 1 of demand fulfillment, namely demand fulfillment distributes to the DM-RS port of all RB of same UE is identical.

The implementation of resource allocation methods described in the present embodiment as shown in Figure 1, mainly comprises the steps:

Step 101: select a RB from all RB to be allocated.

In this step, a RB can be selected by multiple method from all RB to be allocated.Such as, the RB that weighted sum is the highest, throughput is the highest or priority is the highest can be selected from all RB to be allocated, or from all RB to be allocated Stochastic choice RB.

Step 102: dispatch on selected RB, and according to the corresponding relation of UE and the DM-RS port recorded, in scheduling result, select the scheduling result meeting above-mentioned restrictive condition 1.

In this step, described scheduling is specially SU-MIMO scheduling or/and MU-MIMO scheduling.Specifically, this step comprises following sub-step:

A1, selected RB carries out SU-MIMO or/and MU-MIMO scheduling, and obtains a scheduling result;

If there is DM-RS port collision, then think that described scheduling result can not meet restrictive condition 1, namely ensure that the DM-RS port distributing to all RB of same UE is identical, abandon this scheduling result, and return A1;

If there is no DM-RS port collision, then think that described scheduling result meets restrictive condition 1, namely can ensure that the DM-RS port of all RB distributing to same UE is identical, using described scheduling result as selected scheduling result.

In above process, multiple user scheduling method can be adopted on selected RB to carry out SU-MIMO or/and MU-MIMO scheduling, such as equitable proportion (PF) scheduling, poll (RR) scheduling, max carrier to interference (MCI) scheduling etc.

Such as, in this step, if the corresponding relation of UE and the DM-RS port recorded is as shown in table 1, then due to all corresponding Port#0 of UE1 and UE5, avoid DM-RS port collision between the different UEs on identical RB for the restriction meeting above-mentioned restrictive condition 1 simultaneously, selected RB carries out SU-MIMO or/and the scheduling of MU-MIMO time just can not dispatch UE1 and UE5 simultaneously; In like manner, due to all corresponding Port#1 of UE2 and UE3, then on selected RB, carry out SU-MIMO or/and the scheduling of MU-MIMO time can not dispatch UE2 and UE3 simultaneously.

UE	UE1	UE2	UE3	UE4	UE5
						DM-RS port	Port#0	Port#1	Port#1	Port#2	Port#0

Table 1

In actual applications, can configure by being respectively each UE one is recorded UE and DM-RS port corresponding relation for the DM-RS port register recording the DM-RS port corresponding with this UE.

It should be noted that, the corresponding relation of UE and DM-RS port sets up in the process of Resourse Distribute.Namely, before carrying out Resourse Distribute, all UE all do not have corresponding DM-RS port, and the corresponding relation of UE and the DM-RS also namely recorded port is for empty yet.Often distributing a RB, and after all UE of scheduling are all assigned corresponding DM-RS port on this RB, can according to the corresponding relation of allocation result record UE and DM-RS port.So, according to the corresponding relation of UE and the DM-RS port recorded, the scheduling result meeting above-mentioned restrictive condition 1 can be selected from scheduling result when distributing next RB.

Step 103: the DM-RS port according to selected scheduling result being the UE distribution correspondence of not yet distributing corresponding DM-RS port, and record the corresponding relation of newly-established UE and DM-RS port, then return step 101, until all RB have all been assigned with.

In this step, can be that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port by ascending order, descending or random mode, ensure to share the DM-RS port difference that the different UEs of this RB is corresponding.

Such as, if the corresponding relation of UE and the DM-RS port recorded before is as shown in table 1, obtain scheduling result for dispatch UE2 on this RB, UE4 and UE6 by performing step 102.Wherein, UE2 has been assigned corresponding DM-RS port Port#1, and UE32 has been assigned corresponding DM-RS port Port#2, and UE6 not yet distributes corresponding DM-RS port.Then in this step, the DM-RS port corresponding with it is distributed by for UE6.It should be noted that, for avoiding the DM-RS port collision on identical RB between different UEs, the DM-RS port distributed for UE6 should be different from DM-RS port corresponding to other UE that this RB dispatches, the Port#2 that Port#1 and UE4 that such as UE2 is corresponding is corresponding.Further, when distributing DM-RS port for UE6, can distribute according to the mode of ascending order, such as, distributing Port#0; Or distribute according to the mode of descending, such as, distribute Port#3; Or distribute Port#0 or Port#3 according to random mode.And after distribute corresponding DM-RS port for all UE not yet distributing corresponding DM-RS port, record the corresponding relation of newly-established UE and DM-RS port.Such as, if the DM-RS port of its correspondence of UE6 distribution is Port#3, then, after execution of step 103, the corresponding relation of UE and the DM-RS the recorded port obtained is by as shown in table 2.

UE

UE1

UE2

UE3

UE4

UE5

UE6

DM-RS port

Port#0

Port#1

Port#2

Port#0

Port#3

Table 2

Can be found out by above-mentioned resource allocation methods, by the corresponding relation of record UE and DM-RS port, carrying out SU-MIMO or/and judge whether the DM-RS port collision existed between different UEs when MU-MIMO dispatches, the scheduling result of above-mentioned restrictive condition 1 can be met.

Embodiment 2

Present embodiments provide a kind of for SU-MIMO or/and the resource allocation methods of nontransparent MU-MIMO, the scheduling of lte-a system can be realized.

As previously mentioned, when distributing RB for nontransparent UE, the restriction of the above-mentioned restrictive condition 1 of demand fulfillment and restrictive condition 2, namely demand fulfillment distributes to the DM-RS port of all RB of same UE is identical and the Rank distributing to all RB of same UE is identical.In the present embodiment, for convenience, by the Rank that distributes to all RB of same UE referred to as Rank corresponding to this UE.

The implementation of resource allocation methods described in the present embodiment as shown in Figure 2, mainly comprises the steps:

Step 201: select a RB from all RB to be allocated.

As described in step 101, a RB can be selected by multiple method from all RB to be allocated.Such as, the RB that weighted sum is the highest, throughput is the highest or priority is the highest can be selected from all RB to be allocated, or from all RB to be allocated Stochastic choice RB.

Step 202: dispatch on selected RB, and according to the corresponding relation of UE and the DM-RS port recorded and the corresponding relation of UE Rank corresponding to it, in scheduling result, select the scheduling result meeting above-mentioned restrictive condition 1 and restrictive condition 2.

In this step, described scheduling is specially SU-MIMO scheduling or/and MU-MIMO scheduling.Specifically, this step specifically comprises:

B1, selected RB carries out SU-MIMO scheduling or/and MU-MIMO scheduling, and obtains a scheduling result;

B2, judge whether there is DM-RS port collision between all UE be scheduled in this scheduling result according to the corresponding relation of UE and the DM-RS port recorded, if there is DM-RS port collision, then think that described scheduling result can not meet restrictive condition 1, the DM-RS port that namely can not ensure all RB distributing to same UE is identical, abandon this scheduling result, and return B1; If there is no DM-RS port collision, then think that described scheduling result can meet restrictive condition 1, namely ensures that the DM-RS port distributing to all RB of same UE is identical, and perform B3;

B3, whether all identical according to the Rank that this scheduling result and the UE that recorded and the corresponding relation of its corresponding Rank judge to have distributed to all RB of same UE, if, then think that described scheduling result can meet restrictive condition 2, can ensure that the Rank of all RB distributing to same UE is identical, using described scheduling result as selected scheduling result; Otherwise, think that described scheduling result can not meet restrictive condition 2, namely can not ensure that the Rank of all RB distributing to same UE is identical, abandon this scheduling result, return B1.

In above process, multiple user scheduling method can be adopted on selected RB to carry out SU-MIMO scheduling or/and MU-MIMO scheduling, such as PF scheduling, RR scheduling and MCI scheduling etc.

Such as, in this step, if the corresponding relation of the corresponding relation of UE and the DM-RS port recorded and Rank corresponding to UE is as shown in table 3, then as previously mentioned, selected RB carries out SU-MIMO scheduling or/and the scheduling of MU-MIMO time just can not dispatch UE1 and UE5 simultaneously, UE2 and UE3 can not be dispatched simultaneously.Further, in order to the Rank ensureing all RB distributing to same UE is identical, the UE (UE3 or UE5) of corresponding Rank2 and the UE (UE1, UE2 or UE4) of corresponding Rank3 can not be dispatched simultaneously.

UE	UE1	UE2	UE3	UE4	UE5
						DM-RS port	Port#0	Port#1	Port#1	Port#2	Port#0
Rank	Rank3	Rank3	Rank2	Rank3	Rank2

Table 3

In actual applications, can configure by being respectively each UE one is recorded UE and DM-RS port corresponding relation for the DM-RS port register recording the DM-RS port corresponding with this UE; One is recorded UE Rank corresponding with it corresponding relation for recording the Rank register corresponding with this UE is configured by being respectively each UE.

It should be noted that, the corresponding relation of UE Rank corresponding to it is also set up in the process of Resourse Distribute.Namely, before carrying out Resourse Distribute, all UE all do not have corresponding Rank, and the corresponding relation of UE and the Rank also namely recorded is for empty yet.Often obtain one meet the scheduling result of restrictive condition 1 and restrictive condition 2 after, can according to the corresponding relation of scheduling result record UE and Rank.

Step 203: the DM-RS port according to selected scheduling result being the UE distribution correspondence of not yet distributing corresponding DM-RS port, and record the corresponding relation of newly-established UE and DM-RS port, be the Rank not having the UE of corresponding Rank to determine correspondence according to selected scheduling result, and record the corresponding relation of newly-established UE and Rank, then step 201 is returned, until all RB have all been assigned with.

As previously mentioned, in this step, can be that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port by ascending order, descending or random mode, ensure to share the DM-RS port difference that the different UEs of this RB is corresponding.In addition, can be directly not yet have the UE of corresponding Rank to determine corresponding Rank according to the number of UE dispatched on this RB.

Such as, if the corresponding relation of UE and the DM-RS port recorded before is as shown in table 3, obtain scheduling result for dispatch UE2 on this RB, UE4 and UE6 by performing step 102.Wherein, UE2 has been assigned corresponding DM-RS port Port#1, and corresponding Rank is Rank3; UE3 has been assigned corresponding DM-RS port Port#2, and corresponding Rank is Rank3, and UE6 not yet distributes corresponding DM-RS port, does not also have corresponding Rank.Then in this step, the DM-RS port corresponding with it is distributed, such as Port#3 by for UE6.And UE6 determines Rank, be Rank3.After execution of step 203, the corresponding relation of UE and the DM-RS recorded port obtained and the corresponding relation of UE and Rank are by as shown in table 4.

UE

UE1

UE2

UE3

UE4

UE5

UE6

DM-RS port

Port#0

Port#1

Port#2

Port#0

Port#3

Rank

Rank3

Rank2

Rank3

Rank2

Rank3

Table 4

Can be found out by above-mentioned resource allocation methods, by the corresponding relation of record UE and DM-RS port, carrying out SU-MIMO scheduling or/and judge whether the DM-RS port collision existed between different UEs when MU-MIMO dispatches, the scheduling result of above-mentioned restrictive condition 1 can be met.In addition, by the corresponding relation of record UE Rank corresponding to it, can carry out SU-MIMO scheduling or/and MU-MIMO scheduling time the judgement number of UE dispatched whether corresponding with these UE Rank identical, thus be met the scheduling result of above-mentioned condition 2.

Embodiment 3

As previously mentioned, when distributing RB for nontransparent UE, the restriction of the above-mentioned restrictive condition 1 of demand fulfillment and restrictive condition 2, namely demand fulfillment distributes to the DM-RS port of all RB of same UE is identical and the Rank distributing to all RB of same UE is identical.

The implementation of resource allocation methods described in the present embodiment as shown in Figure 3, mainly comprises the steps:

Step 301: the value selecting a Rank, and the Rank arranging all RB to be allocated is equal to this value.

In this step, the value that ascending order, descending or random mode select a Rank in all possible Rank value can be passed through.

Step 302: select a RB from all RB to be allocated.

Step 303: the value according to selected Rank is dispatched on selected RB, and according to the corresponding relation of UE and the DM-RS port recorded, select to meet above-mentioned restrictive condition 1 one scheduling result in scheduling result.

In this step, described scheduling is specially SU-MIMO scheduling or/and MU-MIMO scheduling.

It should be noted that, in this step, carry out SU-MIMO scheduling or/and the Rank sum meeting all UE dispatched on this RB when MU-MIMO dispatches is the value of the Rank that step 301 is arranged.

In this step, dispatched by SU-MIMO or/and MU-MIMO scheduling obtain a scheduling result after, first judge whether there is DM-RS port collision between the UE that is scheduled according to the corresponding relation of UE and DM-RS port recorded, if there is DM-RS port collision, then think that this scheduling result does not meet the restriction of above-mentioned restrictive condition 1, abandon this scheduling result, and again on this RB, carry out SU-MIMO scheduling or/and MU-MIMO scheduling, until be met the scheduling result of above-mentioned restrictive condition 1 restriction.As previously mentioned, multiple user scheduling method can be adopted on selected RB to carry out SU-MIMO scheduling or/and MU-MIMO scheduling, such as PF scheduling, RR scheduling and MCI scheduling etc.

Step 304: the DM-RS port according to selected scheduling result being the UE distribution correspondence of not yet distributing corresponding DM-RS port, and record the corresponding relation of newly-established UE and DM-RS port, then return step 302, until all RB have all been assigned with, then perform step 305.

As previously mentioned, in this step, can be that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port by ascending order, descending or random mode, ensure to share the DM-RS port difference that the different UEs of this RB is corresponding.

Step 305: record should the resource allocation result of Rank value, then return step 301, until all obtain a resource allocation result to all possible Rank value, then perform step 306.

Step 306: the resource allocation result of more corresponding different Rank value, the best allocation result of selectivity is as final resource allocation result.

In this step, the allocation result that the best result respectively of described performance can be allocation result that priority is the highest also can be throughput is maximum.

Can be found out by above-mentioned resource allocation methods, by the corresponding relation of record UE and DM-RS port, carrying out SU-MIMO scheduling or/and judge whether the DM-RS port collision existed between different UEs when MU-MIMO dispatches, the scheduling result of above-mentioned restrictive condition 1 can be met.In addition, by presetting the value of the Rank of RB, the Rank that when ensureing this Resourse Distribute, all UE are corresponding is all identical, thus is met the scheduling result of above-mentioned condition 2.

All be assigned as with RB the explanation that example carries out in the above-described embodiments, it should be noted that, resource allocation methods provided by the present invention can also be applied directly in the assigning process of other frequency domain resource, such as subcarrier, polymerization carrier wave (CC, component carrier) or subband etc. assigning process in, also directly replace with by the RB in embodiment 1-3 the distribution that other frequency domain resource can realize other frequency domain resource.In the present invention, for convenience, by above-mentioned as RB, subcarrier, frequency domain resource such as polymerization carrier wave and subband etc. is referred to as frequency domain resource unit.

Except above-mentioned resource allocation methods, present invention also offers the resource allocation device realizing said method, as shown in Figure 4, above-mentioned resource allocation device mainly comprises:

Resource selection module, for selecting a frequency domain resource unit from all frequency domain resource units to be allocated, until distribute all frequency domain resource units; As previously mentioned, resource selection module can select frequency domain resource unit by multiple method from all frequency domain resource units to be allocated;

User scheduling module, for dispatching in selected frequency domain resource unit, and according to the corresponding relation of UE and the DM-RS port recorded, selects the scheduling result meeting above-mentioned restrictive condition 1 in scheduling result;

Wherein, corresponding above-described embodiment 1, above-mentioned corresponding relation logging modle can comprise the DM-RS port register for recording the DM-RS port corresponding with this UE being respectively each UE and configuring.

Corresponding above-described embodiment 2, above-mentioned corresponding relation logging modle can further include be respectively that each UE configures for recording the Rank register corresponding with this UE.Now, user scheduling module by for carrying out SU-MIMO scheduling in selected frequency domain resource unit or/and MU-MIMO scheduling, and according to the corresponding relation of UE and DM-RS port recorded and the corresponding relation of UE and Rank, in scheduling result, select the scheduling result meeting above-mentioned restrictive condition 1 and restrictive condition 2.

In addition, the resource allocation device of corresponding above-described embodiment 3 as shown in Figure 5, compared with the resource allocation device shown in Fig. 4, comprises further:

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims

1. a resource allocation methods, is characterized in that, comprising:

2. resource allocation methods according to claim 1, is characterized in that,

Comprise taking a step forward of A of execution:

A0, select the value of a Rank, and the Rank arranging all frequency domain resource units to be allocated is equal to this value;

Comprise further after execution C:

D, records should the resource allocation result of Rank value, then returns A0, until all obtain a resource allocation result to all possible Rank value, then perform E; And

E, the resource allocation result of more corresponding different Rank value, the best allocation result of selectivity is as final resource allocation result; Wherein,

Describedly in selected frequency domain resource unit, carry out scheduling packets draw together: carry out single user multiple-input and multiple-output SU-MIMO according to the value of selected Rank and to dispatch and/or multi-user's multiple-input and multiple-output MU-MIMO dispatches, wherein, the Rank sum of each UE of scheduling equals the value of selected Rank.

3. resource allocation methods according to claim 1 and 2, is characterized in that, described B comprises:

A1, selected frequency domain resource unit carries out SU-MIMO and/or MU-MIMO scheduling, and obtains a scheduling result;

4. resource allocation methods according to claim 1, is characterized in that, the corresponding relation of UE and the DM-RS port recorded before carrying out Resourse Distribute is for empty.

5. a resource allocation methods, is characterized in that, comprising:

6. resource allocation methods according to claim 5, is characterized in that, described B comprises:

B1, selected frequency domain resource unit carries out single user multiple-input and multiple-output SU-MIMO or/and multi-user's multiple-input and multiple-output MU-MIMO dispatches, and obtains a scheduling result;

If so, then using described scheduling result as selected scheduling result;

Otherwise, abandon this scheduling result, return B1.

7. resource allocation methods according to claim 1 or 5, it is characterized in that, comprise for the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port: be that the UE not yet distributing corresponding DM-RS port distributes corresponding DM-RS port by ascending order, descending or random mode, ensure that DM-RS port corresponding to the different UEs of dispatching in selected frequency domain resource unit is different.

8. resource allocation methods according to claim 1 or 5, it is characterized in that, the corresponding relation recording newly-established UE and DM-RS port comprises: be respectively the DM-RS port register that each UE is configured for the record DM-RS port corresponding with this UE, record the corresponding relation of newly-established UE and DM-RS port.

9. resource allocation methods according to claim 5, is characterized in that, determines that the Rank of its correspondence comprises for not having the UE of corresponding Rank: be the Rank not having the UE of corresponding Rank to determine correspondence according to the number of the UE dispatched in selected frequency domain resource unit.

10. resource allocation methods according to claim 5, it is characterized in that, the corresponding relation recording newly-established UE and Rank comprises: be respectively each UE and be configured for the record Rank register corresponding with this UE, record the corresponding relation of newly-established UE and Rank.

11. resource allocation methods according to claim 5, is characterized in that, the corresponding relation of UE and the DM-RS port recorded before carrying out Resourse Distribute is for empty, and the corresponding relation of UE and the Rank of record is empty.

12. resource allocation methods according to claim 1 or 5, it is characterized in that, from all Resource Block frequency domain resource units to be allocated, select a frequency domain resource unit to comprise: from all frequency domain resource units to be allocated, select the frequency domain resource unit that weighted sum is the highest or priority is the highest or throughput is the highest; Or Stochastic choice frequency domain resource unit from all frequency domain resource units to be allocated.

13. resource allocation methods according to claim 1 or 5, is characterized in that, the fair PF dispatching algorithm of described scheduling adoption rate or poll RR dispatching algorithm or max carrier to interference MCI dispatching algorithm.

14. resource allocation methods according to claim 1 or 5, it is characterized in that, described frequency domain resource unit is Resource Block RB, subcarrier, polymerization carrier wave or subband.

15. 1 kinds of resource allocation devices, is characterized in that, comprising:

16. resource allocation devices according to claim 15, is characterized in that, corresponding relation logging modle comprises: be respectively the DM-RS port register for recording the DM-RS port corresponding with this UE that each UE configures.

17. resource allocation devices according to claim 16, is characterized in that, corresponding relation logging modle can further include: be respectively each UE configure for recording the Rank register corresponding with this UE; Wherein,

User scheduling module for carrying out single user multiple-input and multiple-output SU-MIMO in selected frequency domain resource unit or/and multi-user's multiple-input and multiple-output MU-MIMO dispatches, according to the user equipment (UE) recorded and the corresponding relation of demodulated pilot signal DM-RS port and the corresponding relation of UE and Rank, a scheduling result is selected in scheduling result, ensure that the DM-RS port distributing to all frequency domain resource units of same UE is identical, ensure that the Rank distributing to all frequency domain resource units of same UE is identical simultaneously.

18., according to resource allocation device described in claim 15, is characterized in that, comprise further: