CN102264129A

CN102264129A - Method and device for distributing resources

Info

Publication number: CN102264129A
Application number: CN2010101885470A
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: 2011-11-30
Anticipated expiration: 2030-05-31
Also published as: JP5769500B2; CN102264129B; JP2011254467A

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, particularly improved Long Term Evolution (LTE-Advanced, LTE-A) resource allocation methods in the system and device.

Background technology

Cellular mobile telephone brings great convenience for people's communication, and (Global System for Mobile Communication GSM) adopts digital communication technology to second generation global system for mobile communications, has further improved the speech quality of mobile communication.Third generation partner program (3rd GenerationPartnership Project, 3GPP) as the vital tissue of moving communicating field, greatly promoted 3G (Third Generation) Moblie technology (The Third Generation, standardization progress 3G), formulate a series of Wideband Code Division Multiple Access (WCDMA) that comprise and inserted (Wide Code Division Multiple Access, WCDMA), high speed downlink packet inserts (High Speed Downlink Packet Access, HSDPA), (High Speed Uplink Packet Access HSUPA) waits in interior communication system standard in the high speed uplink packet access.

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

The LTE-A system supports multi-user's multiple-input and multiple-output (MU-MIMO) technology, be that the LTE-A system can dispatch a plurality of users (UE) simultaneously on identical frequency spectrum resource, that is to say, in the LTE-A system, a plurality of UE can share spectrum resources, Resource Block (RB, Resource Block) etc. for example.Thereby, how to finish resource allocation, realize that user's scheduling is one of LTE-A system key issue that need solve.

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.

The described resource allocation methods of one embodiment of the invention comprises:

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

B, in selected frequency domain resource unit, dispatch, and, in scheduling result, select a scheduling result according to the corresponding relation of user equipment (UE) that has write down and demodulated pilot signal DM-RS port, the DM-RS port that guarantees to distribute to all frequency domain resource units of same UE is identical;

C according to selected scheduling result, for the UE of unallocated corresponding DM-RS port still distributes corresponding DM-RS port, and writes down the corresponding relation of newly-established UE and DM-RS port, returns A then, until distributing all frequency domain resource units.

Further comprised before carrying out A: A0 select the value of a Rank, and the Rank that all frequency domain resource units to be allocated are set is equal to this value;

After carrying out C, further comprise: D, write down resource allocation result that should the Rank value, return A0 then, until all possible Rank value is all obtained a resource allocation result, carry out E then;

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

Above-mentioned B comprises:

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

A2 judges in this scheduling result whether have the DM-RS port collision between all UE that are scheduled according to the corresponding relation of UE that has write down and DM-RS port,

If there is the DM-RS port collision, think that then the DM-RS port that described scheduling result can not guarantee 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 thinks that then the DM-RS port that described scheduling result can guarantee to distribute to all frequency domain resource units of same UE is identical, with described scheduling result as selected scheduling result.

Corresponding relation at UE that carries out writing down before the resource allocation and DM-RS port is sky.

The described resource allocation methods of 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, in selected frequency domain resource unit, dispatch, and according to the user equipment (UE) that has write down and the corresponding relation of demodulated pilot signal DM-RS port and the corresponding relation of UE corresponding Rank with it, in scheduling result, select a scheduling result, the DM-RS port that all frequency domain resource units of same UE are distributed in assurance is identical, and it is identical that the Rank of all frequency domain resource units of same UE is distributed in assurance simultaneously;

C, according to selected scheduling result, for the UE of unallocated corresponding DM-RS port still distributes corresponding DM-RS port, and write down the corresponding relation of newly-established UE and DM-RS port, for the UE that does not have corresponding Rank determines the Rank that it is corresponding, and write down the corresponding relation of newly-established UE and Rank, return A then, until distributing all frequency domain resource units.

Above-mentioned B comprises:

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

B2 judges in this scheduling result whether have the DM-RS port collision between all UE that are scheduled according to the corresponding relation of UE that has write down and DM-RS port,

If there is the DM-RS port collision, think that then the DM-RS port that described scheduling result can not guarantee 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 is thought that then the DM-RS port that described scheduling result can guarantee to distribute to all frequency domain resource units of same UE is identical, and is carried out B3;

B3 judges with the corresponding relation of its corresponding Rank whether the Rank of all frequency domain resource units that distributed to same UE is identical according to this scheduling result and the UE that write down,

If, then with described scheduling result as selected scheduling result;

Otherwise, abandon this scheduling result, return B1.

For the UE of unallocated corresponding DM-RS port still distributes corresponding DM-RS port to comprise: distribute corresponding DM-RS port by ascending order, descending or mode at random for the UE of unallocated corresponding DM-RS port still, guarantee the DM-RS port difference of the different UEs correspondence of in selected frequency domain resource unit, dispatching.

Writing down newly-established UE comprises with the corresponding relation of DM-RS port: be respectively each UE configuration and be used to write down DM-RS port register with the corresponding DM-RS port of this UE, write down the corresponding relation of newly-established UE and DM-RS port.

Comprise for the UE that does not have corresponding Rank determines its corresponding Rank: the number according to the UE that dispatches in selected frequency domain resource unit is not have the UE of corresponding Rank to determine corresponding Rank.

Writing down newly-established UE comprises with the corresponding relation of Rank: be respectively each UE configuration and be used to write down the Rank register corresponding with this UE, write down the corresponding relation of newly-established UE and Rank.

Corresponding relation at UE that carries out writing down before the resource allocation and DM-RS port is sky, and the corresponding relation of the UE of record and Rank is empty.

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, to select the frequency domain resource unit that weighted sum is the highest or priority is the highest or throughput is the highest; Perhaps from all frequency domain resource units to be allocated, select a frequency domain resource unit at random.

Equitable proportion PF dispatching algorithm or poll RR dispatching algorithm or max carrier to interference MCI dispatching algorithm are adopted in above-mentioned scheduling.

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

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

User's scheduler module, be used in selected frequency domain resource unit, dispatching, and according to the corresponding relation of user equipment (UE) that has write down and demodulated pilot signal DM-RS port, select a scheduling result in scheduling result, the DM-RS port that all frequency domain resource units of same UE are distributed in assurance is identical;

The corresponding relation logging modle, being used for according to selected scheduling result is the corresponding DM-RS port of UE distribution of unallocated corresponding DM-RS port still, and writes down the corresponding relation of newly-established UE and DM-RS port.

Above-mentioned corresponding relation logging modle comprises: the DM-RS port register that is used to write down the DM-RS port corresponding with this UE that is respectively each UE configuration.

Above-mentioned corresponding relation logging modle can further include: what be respectively each UE configuration is used to write down the Rank register corresponding with this UE; Wherein, user's scheduler module is used for carrying out SU-MIMO in selected frequency domain resource unit or/and the MU-MIMO scheduling, according to the corresponding relation of user equipment (UE) that has write down and demodulated pilot signal DM-RS port and the corresponding relation of UE and Rank, select a scheduling result in scheduling result, the DM-RS port that guarantees to distribute to all frequency domain resource units of same UE guarantees to distribute to all frequency domain resource units of same UE when being identical Rank is identical.

Above-mentioned resource allocation device further comprises:

Rank is provided with module, be used for from Rank might value select the value of a Rank, until all possible Rank value is all obtained a resource allocation result; And

Allocation result is selected module, is used for the resource allocation result of the corresponding different Rank values of comparison, and selects the best allocation result of performance as final resource allocation result.

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

Embodiments of the invention have provided resource allocation methods and the resource allocation device that is applicable to the LTE-A system, can realize the scheduling of LTE-A system, satisfy all identical this restrictive condition of DM-RS port of all RB that distribute to same UE at least.

Description of drawings

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

Fig. 2 is the embodiment of the invention 2 described resource allocation methods flow charts;

Fig. 3 is the embodiment of the invention 3 described resource allocation methods flow charts;

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

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

Embodiment

In the LTE-A system, except inheriting the common pilot signal (CRS of LTE version 8 (Rel-8) system definition, Common Reference Signal) outside, also introduced the new pilot signal (RS of two classes, Reference Signal), comprising: channel condition information pilot signal (CSI-RS) and at the demodulated pilot signal (DM-RS) of particular UE.Wherein, DM-RS is used to do the demodulated channel estimated pilot signal.The DM-RS port on the RB that DM-RS port indication territory indication UE in the Physical Downlink Control Channel (PDCCH) is its distribution can be passed through in the base station of LTE-A system.

In the LTE-A system, owing to have only a DM-RS port indication territory on the whole frequency band to be scheduled on corresponding each user's the PDCCH, therefore, when carrying out resource allocation, the DM-RS port that needs to guarantee to distribute to all RB of same UE at least is identical.Yet, single user multiple-input and multiple-output (SU-MIMO) and the MU-MIMO dispatching method of existing application in the LTE system do not considered above-mentioned restrictive condition when carrying out resource allocation, therefore, need a kind of new resource allocation methods, to realize the scheduling of LTE-A system.

Known in the LTE-A system, MU-MIMO can be divided into two kinds of transparent MU-MIMO and nontransparent MU-MIMO according to the transparency of MU-MIMO.Wherein, transparent MU-MIMO is meant that UE can only be known and is used for the required information of demodulation its data, for example is the total number (Rank) that the RB of its distribution goes up data flow, DM-RS port or the like, and can't be informed in whether also there are other UE on the same RB.That is to say that it self is SU-MIMO or MU-MIMO that transparent MU-MIMO does not know.For transparent MU-MIMO, when carrying out resource allocation, only needing the satisfied DM-RS port of distributing to all RB of same UE is that this identical restrictive condition gets final product.In addition, nontransparent MU-MIMO is meant UE and is used for can also knowing the required information of demodulation its data the information that same RB goes up other UE that coexists as except knowing, for example, be the Rank of the RB of its distribution, share DM-RS port or the like of other UE of this RB.That is to say that it self is SU-MIMO or MU-MIMO that nontransparent MU-MIMO can know.Therefore, for nontransparent MU-MIMO, when dispatching, the DM-RS port that satisfies all RB distribute to same UE except needs is identical this restrictive condition (abbreviating restrictive condition 1 as), and the Rank that also needs further to satisfy all RB that distribute to same UE is identical this restrictive condition (abbreviating restrictive condition 2 as).

The resource allocation methods of transparent MU-MIMO and nontransparent MU-MIMO will be described at SU-MIMO in detail below by specific embodiment respectively.

Embodiment 1

Present embodiment provide a kind of at SU-MIMO or/and the resource allocation methods of transparent MU-MIMO can be realized the scheduling of LTE-A system.

As previously mentioned, be SU-MIMO or/and transparent MU-MIMO when distributing RB, need satisfy the restriction of above-mentioned restrictive condition 1, the DM-RS port that promptly needs to satisfy all RB that distribute to same UE is identical.

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

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

In this step, can from all RB to be allocated, select a RB by several different methods.For example, can from all RB to be allocated, select the RB that weighted sum is the highest, throughput is the highest or priority is the highest, or from all RB to be allocated, select a RB at random.

Step 102: on selected RB, dispatch, and, in scheduling result, select to satisfy a scheduling result of above-mentioned restrictive condition 1 according to the corresponding relation of UE that has write down and DM-RS port.

In this step, described scheduling is specially the SU-MIMO scheduling or/and the MU-MIMO scheduling.Particularly, this step comprises following substep:

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

If there is the DM-RS port collision, think that then described scheduling result can not satisfy restrictive condition 1, i.e. it is identical that the DM-RS port of all RB of same UE is distributed in assurance, abandons this scheduling result, and returns A1;

If there is no the DM-RS port collision thinks that then described scheduling result satisfies restrictive condition 1, and the DM-RS port that promptly can guarantee to distribute to all RB of same UE is identical, with described scheduling result as selected scheduling result.

In said process, can adopt multiple user scheduling method on selected RB, to carry out SU-MIMO or/and MU-MIMO dispatches, for example equitable proportion (PF) scheduling, poll (RR) scheduling, max carrier to interference (MCI) scheduling or the like.

For example, in this step, if the corresponding relation of UE that has write down and DM-RS port is as shown in table 1, then because UE1 and all corresponding Port#0 of UE5, avoid DM-RS port collision between the different UEs on the identical RB simultaneously for the restriction of satisfying above-mentioned restrictive condition 1, on selected RB, carry out SU-MIMO or/and just can not dispatch UE1 and UE5 simultaneously during the scheduling of MU-MIMO; In like manner, because UE2 and all corresponding Port#1 of UE3, then on selected RB, carry out SU-MIMO or/and can not dispatch UE2 and UE3 simultaneously during the scheduling of MU-MIMO.

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

Table 1

In actual applications, can write down the corresponding relation of UE and DM-RS port by being respectively DM-RS port register that one of each UE configuration is used to write down the DM-RS port corresponding with this UE.

Need to prove that the corresponding relation of UE and DM-RS port is to set up in the process of resource allocation.Promptly, before carrying out resource allocation, all UE all do not have corresponding DM-RS port yet, and also promptly the corresponding relation of the UE of record and DM-RS port is empty.Distribute a RB whenever, and after this RB all UE of going up scheduling all are assigned corresponding DM-RS port, can write down the corresponding relation of UE and DM-RS port according to allocation result.So, when distributing next RB, can from scheduling result, select to satisfy a scheduling result of above-mentioned restrictive condition 1 according to the corresponding relation of UE that has write down and DM-RS port.

Step 103: according to selected scheduling result is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, and writes down the corresponding relation of newly-established UE and DM-RS port, returns step 101 then, all has been assigned with until all RB.

In this step, can pass through ascending order, descending or mode at random is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, guarantees the DM-RS port difference of the different UEs correspondence of shared this RB.

For example, if the corresponding relation of UE that has write down before and DM-RS port is as shown in table 1, obtain scheduling result on this RB, dispatching UE2, UE4 and UE6 by execution in 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 the still unallocated corresponding DM-RS port of UE6.Then in this step, will distribute the DM-RS port corresponding for UE6 with it.Need to prove that for avoiding the upward DM-RS port collision between the different UEs of identical RB, the DM-RS port that distributes for UE6 should be different from the DM-RS port that this RB goes up other UE correspondences of scheduling, for example Port#2 of the Port#1 of UE2 correspondence and UE4 correspondence.And, when distributing the DM-RS port, can distribute according to the mode of ascending order for UE6, for example distribute Port#0; Perhaps distribute, for example distribute Port#3 according to the mode of descending; Or distribute Port#0 or Port#3 according to mode at random.And after distributing corresponding DM-RS port for the UE of all still unallocated corresponding DM-RS ports the corresponding relation of the newly-established UE of record and DM-RS port.For example, if its corresponding DM-RS port that UE6 distributes is Port#3, then after execution of step 103, the UE that has write down that obtains and the corresponding relation of DM-RS port are with as shown in table 2.

UE

UE1

UE2

UE3

UE4

UE5

UE6

The DM-RS port

Port#0

Port#1

Port#2

Port#0

Port#3

Table 2

By above-mentioned resource allocation methods as can be seen, corresponding relation by record UE and DM-RS port, can be met the scheduling result of above-mentioned restrictive condition 1 carrying out SU-MIMO or/and the MU-MIMO scheduling time judges whether to exist the DM-RS port collision between the different UEs.

Embodiment 2

Present embodiment provide a kind of at SU-MIMO or/and the resource allocation methods of nontransparent MU-MIMO can be realized the scheduling of LTE-A system.

As previously mentioned, be that nontransparent UE is when distributing RB, need satisfy the restriction of above-mentioned restrictive condition 1 and restrictive condition 2, the DM-RS port that promptly needs to satisfy all RB distribute to same UE is identical and the Rank that distributes to all RB of same UE is identical.In the present embodiment, for convenience, the Rank that distributes to all RB of same UE is abbreviated as the Rank of this UE correspondence.

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

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

As described in step 101, can from all RB to be allocated, select a RB by several different methods.For example, can from all RB to be allocated, select the RB that weighted sum is the highest, throughput is the highest or priority is the highest, perhaps from all RB to be allocated, select a RB at random.

Step 202: on selected RB, dispatch, and, in scheduling result, select to satisfy a scheduling result of above-mentioned restrictive condition 1 and restrictive condition 2 according to the UE that has write down and the corresponding relation of DM-RS port and the corresponding relation of UE corresponding Rank with it.

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

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

B2, judge in this scheduling result whether have the DM-RS port collision between all UE that are scheduled according to the corresponding relation of UE that has write down and DM-RS port, if there is the DM-RS port collision, think that then described scheduling result can not satisfy restrictive condition 1, the DM-RS port that promptly can not guarantee to distribute to all RB of same UE is identical, abandon this scheduling result, and return B1; If there is no the DM-RS port collision thinks that then described scheduling result can satisfy restrictive condition 1, i.e. it is identical that the DM-RS port of all RB of same UE is distributed in assurance, and carries out B3;

B3, judge with the corresponding relation of its corresponding Rank whether the Rank of all RB that distributed to same UE is all identical according to this scheduling result and the UE that write down, if, think that then described scheduling result can satisfy restrictive condition 2, the Rank that can guarantee to distribute to all RB of same UE is identical, with described scheduling result as selected scheduling result; Otherwise, thinking that described scheduling result can not satisfy restrictive condition 2, the Rank that promptly can not guarantee to distribute to all RB of same UE is identical, abandons this scheduling result, returns B1.

In said process, can adopt multiple user scheduling method on selected RB, to carry out the SU-MIMO scheduling, for example PF scheduling, RR scheduling and MCI scheduling or the like or/and MU-MIMO dispatches.

For example, in this step, if the corresponding relation of the Rank that the corresponding relation of the UE that write down and DM-RS port and UE are corresponding is as shown in table 3, then as previously mentioned, on selected RB, carry out SU-MIMO scheduling or/and just can not dispatch UE1 and UE5 simultaneously during the scheduling of MU-MIMO, can not dispatch UE2 and UE3 simultaneously.And,, can not dispatch the UE (UE3 or UE5) of corresponding Rank2 and the UE (UE1, UE2 or UE4) of corresponding Rank3 simultaneously for the Rank of all RB of guaranteeing to distribute to same UE is identical.

UE	UE1	UE2	UE3	UE4	UE5
						The 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 write down the corresponding relation of UE and DM-RS port by being respectively DM-RS port register that one of each UE configuration is used to write down the DM-RS port corresponding with this UE; Be used to write down the corresponding relation that the Rank register corresponding with this UE writes down UE Rank corresponding with it by being respectively each one of UE configuration.

Need to prove that UE also is to set up with the corresponding relation of its corresponding Rank in the process of resource allocation.Promptly, before carrying out resource allocation, all UE all do not have corresponding Rank yet, and also promptly the corresponding relation of the UE of record and Rank is empty.After whenever obtaining a scheduling result that satisfies restrictive condition 1 and restrictive condition 2, can write down the corresponding relation of UE and Rank according to scheduling result.

Step 203: according to selected scheduling result is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, and write down the corresponding relation of newly-established UE and DM-RS port, according to selected scheduling result is not have the UE of corresponding Rank to determine corresponding Rank, and write down the corresponding relation of newly-established UE and Rank, return step 201 then, all be assigned with until all RB.

As previously mentioned, in this step, can pass through ascending order, descending or mode at random is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, guarantees the DM-RS port difference of the different UEs correspondence of shared this RB.In addition, can directly determine corresponding Rank for the UE that corresponding Rank is not arranged as yet according to the number of the UE that on this RB, dispatches.

For example, if the corresponding relation of UE that has write down before and DM-RS port is as shown in table 3, obtain scheduling result on this RB, dispatching UE2, UE4 and UE6 by execution in 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 the still unallocated corresponding DM-RS port of UE6 does not have corresponding Rank yet.Then in this step, will distribute the DM-RS port corresponding, for example Port#3 for UE6 with it.And UE6 determines Rank, is Rank3.After execution of step 203, the corresponding relation of the UE that has write down that obtains and the corresponding relation of DM-RS port and UE and Rank is with as shown in table 4.

UE

UE1

UE2

UE3

UE4

UE5

UE6

The DM-RS port

Port#0

Port#1

Port#2

Port#0

Port#3

Rank

Rank3

Rank2

Rank3

Rank2

Rank3

Table 4

By above-mentioned resource allocation methods as can be seen, corresponding relation by record UE and DM-RS port, can be met the scheduling result of above-mentioned restrictive condition 1 carrying out SU-MIMO scheduling or/and judge whether to exist DM-RS port collision between the different UEs during MU-MIMO scheduling.In addition, by the corresponding relation of record UE and its corresponding Rank, can carry out the SU-MIMO scheduling, thereby be met the scheduling result of above-mentioned condition 2 or/and the number of the UE that judgement is dispatched during the MU-MIMO scheduling is whether identical with the corresponding Rank of these UE.

Embodiment 3

As previously mentioned, be that nontransparent UE is when distributing RB, need satisfy the restriction of above-mentioned restrictive condition 1 and restrictive condition 2, the DM-RS port that promptly needs to satisfy all RB distribute to same UE is identical and the Rank that distributes to all RB of same UE is identical.

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

Step 301: select the value of a Rank, and the Rank that all RB to be allocated are set is equal to this value.

In this step, can pass through ascending order, descending or mode are at random selected a Rank in all possible Rank value value.

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

Step 303: the value according to selected Rank is dispatched on selected RB, and according to the corresponding relation of UE that has write down and DM-RS port, selects to satisfy 1 one scheduling result of above-mentioned restrictive condition in scheduling result.

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

Need to prove, in this step, carry out SU-MIMO scheduling or/and satisfy the value that the Rank sum of all UE that dispatch is the Rank that is provided with of step 301 during the MU-MIMO scheduling on this RB.

In this step, by SU-MIMO scheduling or/and after the MU-MIMO scheduling obtains a scheduling result, at first judge between the UE that is scheduled whether have the DM-RS port collision according to the corresponding relation of UE that has write down and DM-RS port, if there is the DM-RS port collision, think that then this scheduling result does not satisfy the restriction of above-mentioned restrictive condition 1, abandon this scheduling result, and on this RB, carry out the SU-MIMO scheduling again or/and MU-MIMO dispatches, until the scheduling result that is met above-mentioned restrictive condition 1 restriction.As previously mentioned, can adopt multiple user scheduling method on selected RB, to carry out the SU-MIMO scheduling, for example PF scheduling, RR scheduling and MCI scheduling or the like or/and MU-MIMO dispatches.

Step 304: according to selected scheduling result is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, and write down the corresponding relation of newly-established UE and DM-RS port, return step 302 then, all be assigned with until all RB, execution in step 305 then.

As previously mentioned, in this step, can pass through ascending order, descending or mode at random is the corresponding DM-RS port of UE distribution of still unallocated corresponding DM-RS port, guarantees the DM-RS port difference of the different UEs correspondence of shared this RB.

Step 305: record returns step 301 then to resource allocation result that should the Rank value, and until all possible Rank value is all obtained a resource allocation result, execution in step 306 then.

Step 306: the resource allocation result of more corresponding different Rank values, select the best allocation result of performance as final resource allocation result.

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

By above-mentioned resource allocation methods as can be seen, corresponding relation by record UE and DM-RS port, can be met the scheduling result of above-mentioned restrictive condition 1 carrying out SU-MIMO scheduling or/and judge whether to exist DM-RS port collision between the different UEs during MU-MIMO scheduling.In addition, the value of the Rank by preestablishing RB, the Rank of all UE correspondences is all identical when guaranteeing this resource allocation, thereby is met the scheduling result of above-mentioned condition 2.

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

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

The resource selection module is used for selecting a frequency domain resource unit from all frequency domain resource units to be allocated, until distributing all frequency domain resource units; As previously mentioned, the resource selection module can be selected frequency domain resource unit by several different methods from all frequency domain resource units to be allocated;

User's scheduler module is used for dispatching in selected frequency domain resource unit, and according to the corresponding relation of UE that has write down and DM-RS port, selects to satisfy the scheduling result of above-mentioned restrictive condition 1 in scheduling result;

Wherein, corresponding the foregoing description 1, above-mentioned corresponding relation logging modle can comprise the DM-RS port register that is used to write down the DM-RS port corresponding with this UE that is respectively each UE configuration.

Corresponding the foregoing description 2, above-mentioned corresponding relation logging modle can further include be respectively each UE configuration be used to write down the Rank register corresponding with this UE.At this moment, user's scheduler module will be used for carrying out in selected frequency domain resource unit the SU-MIMO scheduling or/and the MU-MIMO scheduling, and, in scheduling result, select to satisfy the scheduling result of above-mentioned restrictive condition 1 and restrictive condition 2 according to the corresponding relation of UE that has write down and DM-RS port and the corresponding relation of UE and Rank.

In addition, the resource allocation device of corresponding the foregoing description 3 is compared with resource allocation device shown in Figure 4 as shown in Figure 5, further comprises:

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to 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,

Before carrying out A, further comprise:

A0 selects the value of a Rank, and the Rank that all frequency domain resource units to be allocated are set is equal to this value;

After carrying out C, further comprise:

D, record returns A0 then to resource allocation result that should the Rank value, until all possible Rank value is all obtained a resource allocation result, carries out E then; And

E, the resource allocation result of more corresponding different Rank values selects the best allocation result of performance as final resource allocation result; Wherein,

The described scheduling packets of carrying out in selected frequency domain resource unit is drawn together: carry out single user's multiple-input and multiple-output SU-MIMO scheduling and/or multi-user's multiple-input and multiple-output MU-MIMO scheduling according to the value of selected Rank, 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 carries out SU-MIMO and/or MU-MIMO scheduling, and obtains a scheduling result in selected frequency domain resource unit;

4. resource allocation methods according to claim 1 is characterized in that, at the corresponding relation of UE that carries out writing down before the resource allocation and DM-RS port 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 carries out single user's 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 in selected frequency domain resource unit;

If, then with 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, for the UE of unallocated corresponding DM-RS port still distributes corresponding DM-RS port to comprise: distribute corresponding DM-RS port by ascending order, descending or mode at random for the UE of unallocated corresponding DM-RS port still, guarantee the DM-RS port difference of the different UEs correspondence of in selected frequency domain resource unit, dispatching.

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

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

10. resource allocation methods according to claim 5, it is characterized in that, writing down newly-established UE comprises with the corresponding relation of Rank: be respectively each UE configuration and be used to write down the Rank register corresponding with this UE, write down the corresponding relation of newly-established UE and Rank.

11. resource allocation methods according to claim 5 is characterized in that, for empty, and the corresponding relation of the UE of record and Rank is a sky at the corresponding relation of UE that carries out writing down before the resource allocation and DM-RS port.

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; Perhaps from all frequency domain resource units to be allocated, select a frequency domain resource unit at random.

13. resource allocation methods is characterized in that according to claim 1 or 5, equitable proportion PF dispatching algorithm or poll RR dispatching algorithm or max carrier to interference MCI dispatching algorithm are adopted in described scheduling.

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

15. a resource allocation device is characterized in that, comprising:

16. resource allocation device according to claim 15 is characterized in that, the corresponding relation logging modle comprises: the DM-RS port register that is used to write down the DM-RS port corresponding with this UE that is respectively each UE configuration.

17. resource allocation device according to claim 16 is characterized in that, the corresponding relation logging modle can further include: what be respectively each UE configuration is used to write down the Rank register corresponding with this UE; Wherein,

User's scheduler module is used for carrying out single user's 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 scheduling, according to the corresponding relation of user equipment (UE) that has write down and demodulated pilot signal DM-RS port and the corresponding relation of UE and Rank, select a scheduling result in scheduling result, the DM-RS port that guarantees to distribute to all frequency domain resource units of same UE guarantees to distribute to all frequency domain resource units of same UE when being identical Rank is identical.

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