CN102325375A - Resource allocation method and device - Google Patents

Abstract

The invention provides a resource allocation method and a device. The method comprises the steps of: respectively selecting cooperation cells for all subordinate users in a base station pool; respectively determining the resource block scheduling priorities of all subordinate users according to the cooperation cells; and allocating resource blocks to the designated subordinate users according to the scheduling priorities. The resource allocation method and the device solve the problem that a solution that how to realize the combined resource allocation based on multi-cell cooperation does not exist in relevant techniques. On the premise that the overall spectral efficiency or the throughput of the cells is not decreased, the cell edge coverage is improved.

Description

Resource allocation methods and device

Technical field

The present invention relates to the communications field, in particular to a kind of resource allocation methods and device.

Background technology

Along with the fast development of wireless communication technology, the frequency spectrum resource of wretched insufficiency becomes the principal element of restriction radio communication development gradually, how to make full use of limited frequency spectrum resources, and improving the availability of frequency spectrum is the great difficult problem of radio communication.Multiple-input and multiple-output (Multiple Input Multiple Out abbreviates MIMO as) technology can under the situation that does not increase bandwidth, improve efficiency of transmission because of it and the availability of frequency spectrum obtains extensive favor.

Yet; Traditional M IMO technology can not effectively solve problem of inter-cell interference; The communication process that is Cell Edge User and Serving cell will receive the serious interference of neighbor cell, and can not satisfy the user's communications quality requirement, in order to address this problem; Cooperative multipoint transmission (Coordinated Multiple Point Transmission and Reception; Abbreviation CoMP) technology is suggested, and promptly cooperation is common each other between each neighbor cell is one or more subscriber equipmenies (User Equipment abbreviates UE as) services.

Multiple base stations united transmission (Joint Transmission; Abbreviating JT as) technology belongs to a kind of of CoMP technology; Specifically be meant: data are by each cooperation point Combined Treatment; The data that are each UE are all united emission by all cooperation points, with the raising quality of reception or transmission rate, and can eliminate interference.For JT,, being divided into and relevant unite emission and incoherent and unite emission according to the coherence of emission.Relevant associating emission can be adopted the associating method for precoding, comprises that single UE unites emission and many UE unite emission, and its advantage is that gain is higher, and shortcoming is to need a large amount of down channel H feedback informations, can take too many up channel.When uniting emission when being concerned with; It is incoherent that to unite emission also be a kind of sane launching technique; A plurality of cooperation points of participating in emission all are certain UE service, but emission value is independent formation, therefore can not form coherent signal at the UE end; But acquisition power gain that can be more stable, and do not need feedback channel information.

Because the introducing of CoMP technology; The resource allocation policy of the single sub-district of tradition is no longer suitable; Be that UE selects the running time-frequency resource that is fit to how, how realize that promptly federated resource based on multi-cell cooperating distributes and still do not have the solution of getting well through the multi-cell cooperating under the different CoMP modes (for example incoherent unite emission).

Summary of the invention

To for how to realize distributing the problem of still not having the solution of getting well and propose the present invention in the correlation technique based on the federated resource of multi-cell cooperating; For this reason; Main purpose of the present invention is to provide simple resource allocation methods of a kind of realization and device, to address the above problem.

To achieve these goals, according to an aspect of the present invention, a kind of resource allocation methods is provided.

Resource allocation methods according to the present invention comprises: be respectively all subordinate users of pond, base station and select cooperation cell; According to cooperation cell, confirm the dispatching priority of all subordinate users on Resource Block respectively; According to dispatching priority, distributes resource blocks is given and is specified subordinate user respectively.

Preferably; According to cooperation cell; Confirm that respectively the dispatching priority of all subordinate users on Resource Block comprises: based on the criterion of confirming; Calculate all subordinate users' dispatching priority metric respectively, wherein, the criterion of confirming comprises equitable proportion criterion, max carrier to interference criterion, poll criterion.

Preferably; Based on the criterion of confirming; The dispatching priority metric that calculates all subordinate users respectively comprises: the user for there being a plurality of cooperation cell, user feedback data is merged, and obtain being used to calculate the merging data of said dispatching priority metric; Based on the criterion of confirming, use said merging data, calculate said dispatching priority metric.

Preferably, according to dispatching priority, distributes resource blocks is given and is specified subordinate user to comprise respectively: step 1, according to dispatching priority order from high to low, all subordinate users are sorted, and form and treat the dispatched users formation; Step 2 obtains to treat to have in the dispatched users formation the user of high dispatching priority, and gives this user with its cooperation cell resource block assignments; Step 3 is upgraded and is treated the dispatched users formation, and continues execution in step two and step 3, and the Resource Block of all sub-districts all is assigned with in the pond, base station, treats that perhaps the dispatched users formation is for empty.

Preferably, upgrade and to treat that the dispatched users formation comprises: from treat the dispatched users formation, delete the user, wherein the user of deletion comprises: the user of scheduled, with the user's of scheduled cooperation cell related user.

Preferably, according to dispatching priority, distinguish distributes resource blocks and give after the appointment subordinate user, said method also comprises: single cooperation cell user uses the Resource Block fill order cell transmission of Serving cell; Many cooperation cell user uses the Resource Block of a plurality of cooperation cell to carry out the joint transmission of many sub-districts.

Preferably, according to dispatching priority, distinguish distributes resource blocks and give after the appointment subordinate user, said method also comprises: user and other user of distributes resource blocks are matched, and wherein, other user should have identical cooperation cell with this user.

Preferably, being respectively all subordinate users of pond, base station selects cooperation cell to comprise: receive received power indication from its measurement cell to this user and/or channel indication from subordinate user; Be designated as all subordinate users of pond, base station according to received power indication and/or channel and select cooperation cell.

Preferably; Before the received power indication and/or channel indication that receive from subordinate user from its measurement cell to this user; Said method also comprises: all subordinate users of pond, base station measure received power indication and/or channel indication based on the downlink reference signal of measurement cell emission; Wherein, downlink reference signal comprise following one of at least: synchronizing signal, sub-district special reference signal, channel status indication reference signal.

To achieve these goals, according to another aspect of the present invention, a kind of resource allocation device is provided.

Resource allocation device according to the present invention comprises: select module, be used to all subordinate users of pond, base station and select cooperation cell respectively; Determination module is used for according to cooperation cell, confirms the dispatching priority of all subordinate users on Resource Block respectively; Distribution module is used for according to dispatching priority, and distributes resource blocks is given and specified subordinate user respectively.

The present invention has guaranteed when not reducing sub-district overall spectral efficiency or throughput through to the Combined Treatment of a plurality of users according to dispatching priority, improves cell edge and covers.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to the resource allocation methods of the embodiment of the invention;

Fig. 2 is the flow chart of resource allocation methods according to the preferred embodiment of the invention;

Fig. 3 is a sketch map of realizing Combined Treatment according to the preferred embodiment of the invention based on same site (Site);

Fig. 4 is a sketch map of realizing Combined Treatment according to the preferred embodiment of the invention based on the pond, base station (7 sites) of expansion;

Fig. 5 is the structured flowchart according to the resource allocation device of the embodiment of the invention.

Embodiment

Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.

The embodiment of the invention provides a kind of resource allocation methods, and Fig. 1 is the flow chart according to the resource allocation methods of the embodiment of the invention, and is as shown in Figure 1, comprises that following step S102 is to step S104.

Step S102 is respectively all subordinate users of pond, base station and selects cooperation cell.

Step S104 according to cooperation cell, confirms the dispatching priority of all subordinate users on Resource Block respectively.

Step S106, according to dispatching priority, distributes resource blocks is given and is specified subordinate user respectively.

In the correlation technique, still there is not solution for how realizing distributing based on the federated resource of multi-cell cooperating.Through to the Combined Treatment of a plurality of users according to dispatching priority, guaranteed when not reducing sub-district overall spectral efficiency or throughput, improve cell edge and cover.

Preferably; According to cooperation cell; Confirm that respectively the dispatching priority of all subordinate users on Resource Block comprises: based on the criterion of confirming; Calculate all subordinate users' dispatching priority metric respectively, wherein, the criterion of confirming comprises equitable proportion criterion, max carrier to interference criterion, poll criterion.

Preferably, based on the criterion of confirming, the dispatching priority metric that calculates all subordinate users respectively comprises: the user for there being a plurality of cooperation cell, user feedback data is merged, and obtain being used to calculate the merging data of dispatching priority metric; Based on the criterion of confirming, use merging data, calculate the dispatching priority metric.In addition, for the user who has a cooperation cell, use from this user feedback data as merging the back data, so that calculate the dispatching priority metric.

Preferably, according to dispatching priority, distributes resource blocks is given and is specified subordinate user to comprise respectively: step 1, according to dispatching priority order from high to low, all subordinate users are sorted, and form and treat the dispatched users formation; Step 2 obtains to treat to have in the dispatched users formation the user of high dispatching priority, and gives this user with its cooperation cell resource block assignments; Step 3 is upgraded and is treated the dispatched users formation, and continues execution in step two and step 3, and the Resource Block of all sub-districts all is assigned with in the pond, base station, treats that perhaps the dispatched users formation is for empty.

Preferably, upgrade and to treat that the dispatched users formation comprises: from treat the dispatched users formation, delete the user, wherein the user of deletion comprises: the user of scheduled, with the user's of scheduled cooperation cell related user.

Preferably, according to dispatching priority, distinguish distributes resource blocks and give after the appointment subordinate user, said method also comprises: single cooperation cell user uses the Resource Block fill order cell transmission of Serving cell; Many cooperation cell user uses the Resource Block of a plurality of cooperation cell to carry out the joint transmission of many sub-districts.

Preferably, according to dispatching priority, distinguish distributes resource blocks and give after the appointment subordinate user, said method also comprises: user and other user of distributes resource blocks are matched, and wherein, other user should have identical cooperation cell with this user.It is defeated that this preferred embodiment matches the multi-antenna transmitting that can realize the multi-user with this user and other user.

Preferably, being respectively all subordinate users of pond, base station selects cooperation cell to comprise: receive received power indication from its measurement cell to this user and/or channel indication from subordinate user; Be designated as all subordinate users of pond, base station according to received power indication and/or channel and select cooperation cell.

Preferably; Before the received power indication and/or channel indication that receive from subordinate user from its measurement cell to this user; Said method also comprises: all subordinate users of pond, base station measure received power indication and/or channel indication based on the downlink reference signal of measurement cell emission; Wherein, downlink reference signal comprise following one of at least: synchronizing signal, sub-district special reference signal, channel status indication reference signal.

The present invention also provides a preferred embodiment, is used for the entire flow of above-mentioned resource allocation methods is described in detail.Fig. 2 is the flow chart of resource allocation methods according to the preferred embodiment of the invention, and is as shown in Figure 2, comprises that following step S202 is to step S212.

Step S202, cooperation cell is selected for all subordinate users in the pond, base station.

Preferably; Pond, said base station notifies all subordinate users to measure received power indication and the channel indication of its measurement cell to this user respectively; And pass through up link to pond, said base station feedback, wherein, the set of user's measurement cell comprises the subordinate sub-district that pond, said base station is all or part of.Preferably, the pond, base station is designated as the user based on the measurement cell of user feedback to this user's received power indication and/or channel and selects cooperation cell.Particularly, said received power indication comprises mean receiving power indication, the indication of instantaneous received power.Particularly, the set of said user's cooperation cell is contained in this user's measurement cell set.

Particularly, all subordinate users in pond, said base station measure said received power indication and/or channel indication based on the downlink reference signal of said measurement cell emission.Particularly, said downlink reference signal includes but not limited to synchronizing signal, sub-district special reference signal, channel status indication reference signal.Particularly, said channel indication includes but not limited to the order indication (RI) of channel, precoding indication (PMI) and channel quality indication (CQI).

Particularly, said cooperation cell set comprises Serving cell.Particularly, pond, said base station is meant the collection of base stations that can carry out Combined Treatment that links to each other through special purpose interface (the for example X2 interface between the base station) or backboard.Preferably, the cooperation cell set was upgraded based on specific (the long-term or short-term) cycle.

Step S204 selects assignable Resource Block, and all users, constitute and treat the dispatched users formation according to the ordering of from high to low dispatching priority at current Resource Block.Particularly, the calculation criterion of said dispatching priority metric includes but not limited to: equitable proportion (PF) criterion, max carrier to interference (Max C/I) criterion and poll (RR) criterion.Particularly, user and the channel between its cooperation cell indication that is based on this user feedback of user's current actual transfer rate is calculated according to the defeated pattern of single user's multi-antenna transmitting.

Step S206 finds out said treating and has the highest dispatching priority in the dispatched users formation, promptly ranked first the user of position, and carries out the joint transmission of single cell transmission or many sub-districts for this user the current resource block assignments of its cooperation cell.Particularly; If the set of this user's cooperation cell includes only Serving cell; Then give this user with the current resource block assignments of its Serving cell, and fill order's cell transmission, if the set of this user's cooperation cell comprises a plurality of sub-districts; Then give this user, and carry out the joint transmission of many sub-districts its current resource block assignments of a plurality of cooperation cell.In addition, said dispatched users can similar with other and user pairing that satisfy space isolation, realizes multi-user's multi-antenna transmitting defeated (MU-MIMO), and wherein, said similar user is meant one type of user with identical cooperation cell set.

Step S208 upgrades and treats the dispatched users formation.

Particularly, the following user of deletion from Subscriber Queue to be scheduled: 1) scheduled user; 2) other user related with scheduled user's cooperation cell.

Step S210 returns and continues execution in step S206 and step S208, and the current Resource Block until all sub-districts has been assigned with all or has treated that the dispatched users formation is for empty.

Step S212 returns and continues execution in step S204 to step S210, until the distribution of accomplishing all Resource Block.

To sum up, resource allocation methods provided by the invention is based on the dispatched users cooperation and gathers the consideration of coupling fully, to solve the problem that possible cooperation set is not exclusively mated between dispatched users in the existing scheme.Being meant specifically that after the set of its cooperation cell of each user's initialization two kinds of possible situation are only arranged in follow-up scheduling, promptly 1) this user is not scheduled; 2) if be scheduled, then by all the community associated transmission in its cooperation set.

To combine instance that the implementation procedure of the embodiment of the invention is described in detail below.

Fig. 3 is a sketch map of realizing Combined Treatment according to the preferred embodiment of the invention based on same site (Site).

Pond, base station in this preferred embodiment is made up of three sub-districts (Cell) under the same site, is expressed as sub-district 1 (Cell1), sub-district 2 (Cell2), sub-district 3 (Cell3) respectively, links to each other through the backboard between baseband processing unit, to realize various data information sharing.In addition, in this site, have a plurality of subscriber equipmenies to be served (being UE1 to UE9), physical location separately is as shown in Figure 3.

Step 1, said site (Site) is that user (UE1 to UE9) selects the cooperation cell set.

Particularly; Said Site notice UE1 to UE9 measures average or instantaneous received power indication and the channel indication of Cell1 to Cell3 to this UE respectively; And feed back to said Site through up link, this moment, the measurement cell set of UE1 to UE9 was identical, promptly comprised the whole subordinaties of said Site sub-district.Wherein, the indication of said mean receiving power is usually by large scale parameter determining such as path loss, shadow fading, antenna gains, and said instantaneous received power indication is then determined by above-mentioned large scale parameter and small scale parameter such as decline soon jointly.

Particularly; UE1 to UE9 measures received power indication and channel indication based on the downlink synchronous signal (SS) of Cell1 to Cell3 with channel status indication reference signal (CSI-RS); Wherein, the channel indication comprises order indication (RI), precoding indication (PMI) and channel quality indication (CQI) information.Particularly, said Cell1 to Cell3 comprises the Serving cell of any UE.

Particularly, the Serving cell of the relatively more any UE of said Site is indicated the received power indication of arriving this UE with other interior sub-district of its measuring assembly to the received power of this UE.For example, be example with UE1, suppose that its Serving cell is Cell1, then other sub-district in the UE1 measuring assembly is Cell2 and Cell3.Particularly, said Site obtains the received power indication (P from Cell1 to UE1 ₁), and Cell2 and Cell3 indicate (P to the received power of UE1 respectively ₂With P ₃), next make

$V_1=\frac{P_2}{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">P</figure-callout>}}_1},$ ${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{P_3}{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">P</figure-callout>}}_1}$

Then, with V ₁, V ₂Compare with predetermined threshold (Q), if V ₁And/or V ₂Greater than Q, then with corresponding Cell2 and/or Cell3 cooperation cell as UE1.

The cooperation cell set that it should be noted that any UE is not a static configuration, remains unchanged fully in other words conj.or perhaps, and promptly the set of the cooperation cell of UE can be carried out the semi-static adjustment of long-term or short-term based on the feedback cycle of UE arbitrarily.

At last, suppose current embodiment, the cooperation cell set of UE1 to UE9 is as shown in table 1.

Table 1 is the cooperation cell set of UE arbitrarily

The UE index	The cooperation cell set
		UE1	1
UE2	2
		UE3	3，2
UE4	1，2，3
		UE5	2，3
UE6	3
		UE7	1，3
UE8	2，1
		UE9	3

The cooperation cell set of any UE that provides based on table 1, it is as shown in table 2 to provide the user class with identical cooperation cell.Have identical cooperation cell (Cell2 and Cell3) though it should be noted that UE3 and UE5, their Serving cell is respectively Cell3 and Cell2, and promptly they can have Serving cell inequality; And UE6 has identical Serving cell with UE9, i.e. Cell3.

The UE of the identical cooperation cell set of table 2

The cooperation cell set	The UE index
		1	UE1
2	UE2
		3，2	UE3， UE5
1，2，3	UE4
		3	UE6， UE9
1，3	UE7
		2，1	UE8

Step 2 is selected assignable k sub band resources (Subbandk), and UE1 to UE9, constitutes and treats the dispatched users formation according to the ordering of from high to low dispatching priority k sub band resources.

Particularly, the calculation criterion of said dispatching priority metric adopts equitable proportion (PF) criterion, is shown below:

$\mathrm{Metri}{c}_l=\frac{R_l\left(\mathrm{Su}{b}_k\right)}{\mathrm{Avr}{T}_l\left(\mathrm{Su}{b}_k\right)}$

Wherein, R _l(Sub _k) expression is for Subbandk, if l UE be scheduled, then its current transmission rate or throughput, AvrT _l(Sub _k) represent for Subbandk the historical average throughput of l UE in scheduling window N (using sub band number to represent).

Particularly, the current actual transfer rate of UE1 to UE9 is calculated according to the SU-MIMO transmission mode based on the user and the indication of the channel between its cooperation cell of any UE feedback.

For example, be example with UE3, its cooperation cell is Cell2 and Cell3, said Site obtains the channel indication between UE3 and Cell2 based on the feedback of UE3, comprises order indication (RI ₂₃), precoding indication (PMI ₂₃) indicate (CQI with channel quality ₂₃), similarly, obtain the channel indication between UE3 and Cell3, comprise order indication (RI ₃₃), precoding indication (PMI ₃₃) indicate (CQI with channel quality ₃₃).

At this moment, suppose the merging order (RI of UE3 ₃) and channel quality (CQI ₃) be shown below.

RI ₃＝min{RI ₂₃，RI ₃₃}，CQI ₃＝max{CQI ₂₃，CQI ₃₃}

In addition, the order of UE merging and/or the calculating of channel quality are not limited to said method arbitrarily.For example, other method comprises:

Step 1 is based on CQI ₂₃With CQI ₃₃Picked up signal and interference plus noise ratio, i.e. SINR ₂₃With SINR ₃₃

Step 2, the combined signal that calculates UE3 based on following formula compares SINR with interference plus noise ₃:

SINR ₃＝SINR ₂₃+SINR ₃₃

Step 3 is based on SINR ₃Obtain the merging channel quality CQI of UE3 ₃

Particularly, UE3 can be expressed as in the actual transfer rate of Subbandk

$R_3\left({\mathrm{Sub}}_k\right)=\underset{i=1}{\overset{\mathrm{CwNum}}{\mathrm{\&Sigma;}}}\mathrm{CarNum}\&CenterDot;\mathrm{LayN}{\mathrm{um}}_i\&CenterDot;E_{\mathrm{MCS}\_i}$

Wherein, CwNum representes the code word number that transmits, and is not more than order indication (RI ₃), CarNum is illustrated in the spendable data subcarrier number of k sub band resources (Subbandk), LayNum _iRepresent the transmission number of plies that i code word is corresponding, E _{MCS_i}The efficiency of transmission of representing the modulation coding mode (MCS) that i code word used, promptly the significant bit number of every symbol transmission is indicated (CQI through the merging channel quality of above-mentioned UE3 ₃) the information acquisition of tabling look-up.K subband, the historical average throughput of UE3 is shown below.

$\mathrm{Avr}{T}_3\left({\mathrm{Sub}}_k\right)=(1-\frac{1}{N})\&CenterDot;{\mathrm{AvrT}}_3\left({\mathrm{Su}b}_{k-1}\right)---\left(1\right)$

$\mathrm{Avr}{T}_3\left({\mathrm{Sub}}_k\right)=\frac{R_3\left({\mathrm{Sub}}_{k-1}\right)}{N}+(1-\frac{1}{N})\&CenterDot;{\mathrm{AvrT}}_3\left({\mathrm{Su}b}_{k-1}\right)---\left(2\right)$

Wherein, formula 1 and formula 2 are represented the historical average throughput of UE3 Subbandk under the situation that Subbandk-1 is not scheduled and has been scheduled respectively.

It should be noted that under the situation of initialization scheduling or resource allocation AvrT ₃(Sub ₁) be predetermined to be the determined value of a non-zero usually.

Therefore, the scheduling metric (Metric3) of UE3 can be obtained.

By that analogy, the dispatching priority metric (Metric1 to Metric9) of UE (UE1 to UE9) can be obtained arbitrarily, and the scheduling metric is big more, representes that the dispatching priority of corresponding UE is high more.Final hypothesis according to the dispatched users formation of treating that from high to low dispatching priority constitutes does

{UE3，UE6，UE4，UE1，UE2，UE7，UE9，UE5，UE8}。

Preferably, the calculation criterion of said UE dispatching priority metric also comprises, and is not limited to: max carrier to interference (Max C/I) criterion or poll (RR) criterion.

Step 3 is found out and is treated to have in the dispatched users formation (UE1 to UE9) the user of high dispatching priority, and carries out the joint transmission of single cell transmission or many sub-districts for this user k subband resource allocation of its cooperation cell.

Result by step 2 can know; UE3 waits to dispatch the highest UE of dispatching priority in the UE formation; And can know that through look-up table 1 cooperation cell of UE3 is Cell3 and Cell2, i.e. the cooperation cell of UE3 set comprises 2 sub-districts, then this moment; Give UE3 with k the subband resource allocation of Cell3 and Cell2, carry out 2 joint transmission under the base station.

Note,, then only give UE3 k the subband resource allocation of Cell3 if the set of the cooperation cell of UE3 includes only its Serving cell Cell3, and fill order's cell transmission.

Preferably, scheduled user UE3 can also be similar with other and UE that satisfy space isolation pairing, with the multi-antenna transmitting defeated (MU-MIMO) of realizing the multi-user.

Particularly, the similar user of UE3 is the user who has identical cooperation cell with UE3, can know that through look-up table 2 UE2 has identical cooperation cell with UE3.Secondly, need the space isolation of definite UE3 and UE2 whether to meet the demands.

Particularly, based on the feedback of UE3 and UE2, said Site can obtain the merging pre-coding matrix of UE3 and UE2

${\mathrm{<figure-callout\; id="3"\; label="PMI"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">PMI</figure-callout>}}_3=\left[\begin{array}{c}{\mathrm{PMI}}_{23}\\ {\mathrm{PMI}}_{33}\end{array}\right],$ ${\mathrm{<figure-callout\; id="2"\; label="PMI"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">PMI</figure-callout>}}_2=\left[\begin{array}{c}{\mathrm{PMI}}_{22}\\ {\mathrm{PMI}}_{32}\end{array}\right]$

Preferably, use following projection 2 norm distances, calculate PMI but be not limited in this range formula ₃With PMI ₂Space length:

$D_{\mathrm{proj}}({\mathrm{<figure-callout\; id="3"\; label="PMI"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">PMI</figure-callout>}}_3,{\mathrm{PMI}}_2)={\left|\right|{\mathrm{<figure-callout\; id="3"\; label="PMI"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">PMI</figure-callout>}}_3\&CenterDot;{\mathrm{PMI}}_3^H-{\mathrm{<figure-callout\; id="2"\; label="PMI"\; filenames="HDA0000072209680000031.png"\; state="\{\{state\}\}">PMI</figure-callout>}}_2\&CenterDot;{\mathrm{PMI}}_2^H\left|\right|}_2$

Wherein, || || ₂Representing matrix 2 norms, the conjugate transpose operation of H representing matrix.

If D _Proj(PMI ₃, PMI ₂) surpassed predetermined threshold (D for example _B), represent that then UE3 and UE2 satisfy the space isolation requirement.

Perhaps, obtain matrix [PMI ₃PMI ₂] conditional number A, promptly confirm the maximum singular value and the ratio of minimum singular value of matrix, if this conditional number A can represent equally then that above predetermined threshold (for example B) UE3 and UE2 satisfy the space isolation requirement.

Suppose that UE3 and UE2 satisfy the space isolation requirement.

Particularly, based on the merging channel indication of UE3, comprise order indication (RI ₃), precoding indication (PMI ₃) indicate (CQI with channel quality ₃), and the merging channel information of UE2, comprise order indication (RI ₂), precoding indication (PMI ₂) indicate (CQI with channel quality ₂), said Site can predict the order (RI of the current multi-user of being applicable to (UE3 and UE2) transmission _MU) precoding (PMI _MU) and multi-user's channel quality (CQI _MU).For example the multi-user pre-coding based on zero forcing algorithm does

PMI _MU＝[PMI ₃?PMI ₂]·([PMI ₃?PMI ₂] ^H·[PMI ₃?PMI ₂]) ^-1

If can to realize that the UE of pairing transmission have a plurality of with UE3, then can carry out the emission of uniting of many UE according to the UE of the size of the space isolation between UE3 and other UE selection more than 2 or 2.But it should be noted that on k sub band resources, specifically adopt single UE unite emission still be many UE to unite emission relevant with actual traffic carrying capacity or type of service, do not need here to limit.

Finally, suppose that the single UE that on k sub band resources, carries out to UE3 unites emission.

Step 4 is upgraded and is treated dispatched users formation (UE1 to UE9).

Particularly, from Subscriber Queue to be scheduled

{UE3，UE6，UE4，UE1，UE2，UE7，UE9，UE5，UE8}

Delete following user: 1) scheduled user, i.e. UE3;

2) other user related with scheduled user's cooperation cell,

Based on table 2, confirm as UE2, UE4, UE5, UE6, UE7, UE8, UE9.

At this moment, k the sub band resources of Cell3 and Cell2 is assigned to UE3, and the dispatched users formation of treating after the renewal finally is { UE1}.

Step 5 is returned execution in step three and step 4.

Particularly,, give UE1 with k the subband resource allocation of Cell1 through step 3, and single cell transmission of fill order UE; Through step 4, k the sub band resources of all Cell all is assigned with, and treats that the dispatched users formation is for empty.

Finally, about k sub band resources, UE3 and UE1 are scheduled, and be as shown in Figure 3.

Step 6 for k+1 sub band resources, is returned and is continued execution in step two to step 5, until the distribution of accomplishing all sub band resources.

Need to prove that if the subordinate user in pond, said base station is more relatively, the dispatched users formation of treating after then upgrading is not sky all the time; Always there is the central user of some sub-district to exist; So that sub band resources all is assigned with, at this moment, bigger scheduling gain can be obtained.

Preferably, for better embodying the outer loop self-adaptive effect of modulation coding mode (MCS), merge the inaccuracy of introducing to compensate many cooperation cell; In certain (dispatching cycle in transmission time; Unit is TTI, the expression Transmission Time Interval) in, the resource allocation conditions of each sub band resources remains unchanged.

Fig. 4 is a sketch map of realizing joint transmission according to the preferred embodiment of the invention based on the pond, base station (7 sites) of expansion; As shown in Figure 4; Constitute pond, a base station by 3 sites (9 sub-districts), carried out mutual low delay communication through special-purpose interface (the for example X2 interface in the LTE system) between different sites.At this moment, the set of the measurement cell of UE is not limited in the same site with the cooperation cell set arbitrarily, and different UEs can have different measurement cell set.For example; The measurement cell set of UE25 is { Cell1, Cell6, Cell7}; Its cooperation cell (comprising Serving cell) is contained in this set; The set of the measurement cell of UE26 for Cell1, Cell6, Cell8}, its cooperation cell is contained in this set, UE25 has with UE26 that different measurement cell is gathered and/or cooperation cell is gathered.Based on the feedback of any UE and cooperation cell set, the resource allocation process of each sub band resources in the pond, base station that constitutes by a plurality of sites, consistent with the resource allocation process of describing in the preferred embodiment of above-mentioned single site.

Need to prove; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.

The embodiment of the invention provides a kind of resource allocation device, and this resource allocation device can be used to realize above-mentioned resource allocation methods.Fig. 5 is the structured flowchart according to the resource allocation device of the embodiment of the invention, and is as shown in Figure 5, comprises selecting module 52, determination module 54 and distribution module 56.Be described in detail in the face of its structure down.

Select module 52, be used to all subordinate users of pond, base station and select cooperation cell respectively; Determination module 54 is connected to and selects module 52, is used for confirming the dispatching priority of all subordinate users on Resource Block respectively according to the cooperation cell of selecting module 52 to select; Distribution module 56 is connected to determination module 54, is used for the dispatching priority confirmed according to determination module 54, and distributes resource blocks is given and specified subordinate user respectively.

Need to prove that the resource allocation device of describing among the device embodiment is corresponding to above-mentioned method embodiment, its concrete implementation procedure had been carried out detailed description in method embodiment, repeat no more at this.

In sum, according to the abovementioned embodiments of the present invention, simple resource allocation methods of a kind of realization and device are provided.The present invention passes through the Combined Treatment of a plurality of users according to dispatching priority; Solved in the correlation technique for how realizing that the federated resource based on multi-cell cooperating distributes the problem of still not having good solution; And guaranteed when not reducing sub-district overall spectral efficiency or throughput, improve cell edge and cover.

Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

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

Be respectively all subordinate users of pond, base station and select cooperation cell;

According to said cooperation cell, confirm the dispatching priority of said all subordinate users on Resource Block respectively;

Distribute said Resource Block to give according to said dispatching priority and specify subordinate user.

2. method according to claim 1 is characterized in that, according to said cooperation cell, confirms that respectively the dispatching priority of said all subordinate users on Resource Block comprises:

Based on the criterion of confirming, calculate said all subordinate users' dispatching priority metric respectively, wherein, said definite criterion comprises equitable proportion criterion, max carrier to interference criterion, poll criterion.

3. method according to claim 2 is characterized in that, based on the criterion of confirming, the dispatching priority metric that calculates said all subordinate users respectively comprises:

User for there being a plurality of cooperation cell merges user feedback data, obtains being used to calculate the merging data of said dispatching priority metric;

Based on the criterion of confirming, use said merging data, calculate said dispatching priority metric.

4. method according to claim 1 is characterized in that, distributes said Resource Block to give according to said dispatching priority and specifies subordinate user, comprising:

Step 1 according to said dispatching priority order from high to low, sorts to said all subordinate users, forms to treat the dispatched users formation;

Step 2 obtains saidly to treat to have in the dispatched users formation the user of high dispatching priority, and gives this user with its cooperation cell resource block assignments;

Step 3 is upgraded the said dispatched users formation of treating, and continues execution in step two and step 3, and the Resource Block of all sub-districts all is assigned with in pond, said base station, perhaps saidly treats that the dispatched users formation is for empty.

5. method according to claim 4 is characterized in that, upgrades saidly to treat that the dispatched users formation comprises:

Delete the user from said treating the dispatched users formation, the user of wherein said deletion comprises: the user of scheduled, with the user's of said scheduled cooperation cell related user.

6. according to each described method in the claim 1 to 5, it is characterized in that distribute said Resource Block to after the appointment subordinate user according to said dispatching priority, said method also comprises:

Single cooperation cell user uses the said Resource Block fill order cell transmission of Serving cell;

Many cooperation cell user uses the said Resource Block of a plurality of cooperation cell to carry out the joint transmission of many sub-districts.

7. according to each described method in the claim 1 to 5, it is characterized in that distribute said Resource Block to after specifying subordinate user according to said dispatching priority, said method also comprises:

User and other user of said distributes resource blocks are matched, and wherein, said other user should have identical cooperation cell with this user.

8. according to each described method in the claim 1 to 5, it is characterized in that, be respectively all subordinate users of pond, base station and select cooperation cell to comprise:

Reception is from said subordinate user's received power indication from its measurement cell to this user and/or channel indication;

Be designated as all subordinate users of pond, said base station according to the indication of said received power and/or channel and select cooperation cell.

9. method according to claim 8 is characterized in that, before the received power indication and/or channel indication from its measurement cell to this user that receive from said subordinate user, said method also comprises:

All subordinate users of pond, said base station measure said received power indication and/or the indication of said channel based on the downlink reference signal of said measurement cell emission; Wherein, said downlink reference signal comprise following one of at least: synchronizing signal, sub-district special reference signal, channel status indication reference signal.

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

Select module, be used to all subordinate users of pond, base station and select cooperation cell respectively;

Determination module is used for according to said cooperation cell, confirms the dispatching priority of said all subordinate users on Resource Block respectively;

Distribution module is used for distributing said Resource Block to give according to said dispatching priority and specifies subordinate user.

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