CN103687035A - User scheduling method of coordinated multiple point (COMP) transmission technology - Google Patents

Abstract

The invention provides a user scheduling method of a coordinated multiple point (COMP) transmission technology. According to the invention, multiple iterations are adopted, a first sector iterated for the first time is scheduled by adopting a single sector scheduling method, and other sectors are scheduled with user information scheduled by the sector in front of the current sector, so that the current user is scheduled. The user scheduling method has the advantages that a polling manner is adopted, SLINR is improved for carrying out circulating priority scheduling, the principles of SINR maximization and interference leakage minimization are taken into consideration, the cooperative transmission user and concrete precode are determined by considering all user conditions of a plurality of cells cooperatively, so that the spectral efficiency of cell edge is promoted in a key-point manner.

Description

The user scheduling method of cooperative multipoint transmission COMP technology

Technical field

The present invention relates to cooperative multipoint transmission COMP technical field, particularly the user scheduling method of cooperative multipoint transmission COMP technology.

Background technology

Cooperative multipoint transmission COMP is that 3GPP is in R10-R11 stage primary study and standardized technology.Compare with traditional MIMO, COMP technology is sharing downlink channel state information (CSI:channel state information) and the obstructed degree of user data information based on each cooperative base station, cooperation by base station, minizone changes the interference that is originally adjacent cell into useful information, broken through in essence the restriction of unicast to spectrum efficiency, compared with traditional interference cancellation techniques, COMP is by dynamical CSCW between a plurality of base stations that geographically separate, reduce presence of intercell interference, promote cell edge throughput and throughput of system, elevator system performance, emphasis promotes Cell Edge User spectrum efficiency.

COMP mainly comprises following two kinds: cooperative scheduling (CS) and joint transmission (JT).Cooperative scheduling, each cooperative base station is only served the user in community separately by sharing schedule information, when guaranteeing this community service quality, reduces the interference to contiguous other communities; Joint transmission is that each base station joins together to send data to one or more users by sharing data message.

Due to cooperative multipoint transmission need to be between a plurality of base stations transmission information, between base station, the characteristic of return link directly affects the performance of cooperative multipoint transmission.In cooperative scheduling process, be difficult to take into account the principle of disturbing minimum and maximum capacity, and calculating is more complicated, the justice between sector can not be guaranteed, and causes the spectrum efficiency of cell edge still cannot meet user's demand.

Summary of the invention

The user scheduling method that the object of this invention is to provide a kind of cooperative multipoint transmission COMP technology, the method is by combining the situation of considering a plurality of all users in community, determine the user of cooperative transmission and concrete precoding, thereby emphasis promotes the spectrum efficiency of cell edge.

For achieving the above object, technical scheme provided by the present invention is a kind of user scheduling method of cooperative multipoint transmission COMP technology,

Total K resource

For resource 1, to cooperation set of sectors 1,2 ..., m proceeds as follows:

Step 1 is iteration for the first time

Step 1.1 pair sector 1, is used single sector scheduling method to dispatch out user 1;

Step 1.2 pair sector 2, according to sector 1 scheduled user's 1 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 2;

Step 1.3 pair sector 3, according to sector 1,2 scheduled users' 1,2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

......

Step 1.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1,2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 2 is iteration for the second time

Step 2.1 pair sector 1, according to sector 2 ..., m-1, m scheduled user 2 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ²';

Step 2.2 pair sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ²', 3 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ²';

Step 2.3 pair sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ²', 2 ²' ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ²';

......

Step 2.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ²', 2 ²' ..., m-1 ²' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ²';

......

The n time iteration of step n

Step is n.1 to sector 1, according to sector 2 ..., m-1, m scheduled user 2 ^n-1' ..., m-1 ^n-1', m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ⁿ';

Step is n.2 to sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ⁿ, 3 ^n-1' ..., m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ⁿ';

Step is n.3 to sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ⁿ, 2 ⁿ, m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ⁿ';

......

Step n.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ⁿ', 2 ⁿ..., m-1 ⁿ' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ⁿ';

For resource 2, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 2 is being dispatched, the dispatching method of other cooperation set of sectors is identical with the operation in resource 1:

Iteration for the first time

Step 1.1 pair sector 2, is used single sector scheduling method to dispatch out user 2;

Step 1.2 pair sector 3, according to sector 2 scheduled users' 2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

......

Step 1.m-1 is to sector m, according to sector 2 ..., m-1 scheduled user 2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 1.m is to sector 1, according to sector 2 ..., m scheduled user 2 ..., m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1;

......

For resource 3, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 3 is dispatched, other are identical with the operation of resource 1.

......

For resource K, in each iteration, first sector (K mod m) to be dispatched, the class of operation of other and resource 1 is seemingly.

Wherein, m represents sector and corresponding user, and n represents iterations.

Further, described improvement SLINR is

$\mathrm{SLINR}\left(V_i\right)=\frac{\mathrm{tr}\left(V_i^H{R}_i^i{V}_i\right)}{\mathrm{tr}\left(V_i^H(\underset{s\∈S}{\mathrm{\Σ}}\frac{I_{{\mathrm{os}}_1}^{i-}}{I_{\mathrm{os}}^{i-}}*R_j^i)V_i\right)+\mathrm{\α}+I_{0i}}$

Wherein, V _irepresent the pre-coding matrix that user i is used, represent that sector j is to the channel covariance matrices that comprises channel large scale information of user k, α represents white Gaussian noise power, I _0irepresent that user i is subject to the interference from other sectors,

representing that user x receives does not comprise the total interference that comes from total interference of sector i or do not comprise the strongest several interference sectors that come from sector i, V ^hthe conjugate transpose that represents V, tr (A) represents to ask the mark of square formation, refer to A each element of leading diagonal and, user's collection of each sector scheduling in the coordination set of sectors that s is i, s ₁for user collects a user in s.

Further, described single sector scheduling method adopts PF algorithm.

Further, described user's 1 precoding is determined according to single sector method for precoding.

Further, described single sector method for precoding is SINR maximization principle.

Further, described user's 2 dispatching method, when coordination sector is 3, method is as follows:

The Resource Block 1 of step 1 pair sector 1, according to single sector dispatching algorithm, dispatches out user, and note is user 1;

Same resource of step 2 pair sector 2 dispatched, and according to sector, whether 1 scheduled user 1 is coordinates user, carries out different processing:

If i. user 1 is the coordination set of sectors that non-coordinates user or sector 2 do not belong to user 1, is sector 2 dispatched users according to single sector dispatching algorithm, note is user 2, and this user's precoding is determined according to single sector method for precoding;

II. if user 1 is coordinates user, and sector 2 belongs to user 1 coordination set of sectors, and, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 2, concrete grammar is: for all users of sector 2 according to maximization principle

$\mathrm{SLINR}\left(V_2\right)=\frac{\mathrm{tr}\left(V_2^H{R}_2^2{V}_2\right)}{\mathrm{tr}\left(V_2^H\left({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^2\right)V_2\right)+\mathrm{\&alpha;}+I_{02}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 2.

Further, described user's 3 dispatching method, when coordination sector number is 3, method is: according to the scheduling result of sector 1 and sector 2, sector 3 is dispatched, whether belong to user 1 and user's 2 coordination sector according to sector 3, carry out different processing;

If sector 3 belongs to user 1,2 coordination set of sectors, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 3, concrete grammar is, for all users of sector 3 according to maximization principle,

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^3+\frac{I_{o1}^{3-}}{I_{o2}^{3-}}*R_2^3)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3;

If sector 3 belongs to user 1 coordination set of sectors, the coordination set of sectors that does not belong to user 2, according to improvement SLINR maximization principle, determine scheduled user and the precoding of sector 3, only need between sector 1 and sector 3, coordinate, concrete grammar is, for all users of sector 3 according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3;

If sector 3 belongs to user 2 coordination set of sectors, the coordination set of sectors that does not belong to user 1, according to improvement SLINR maximization principle, determine scheduled user and the precoding of sector 3, only need between sector 2 and sector 3, coordinate, concrete grammar is, for all users of sector 3 according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left(R_2^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3.

Further, described iteration is for the second time for re-starting adjustment according to sector 2 to the scheduling situation of sector m to sector 1 to sector m.

Further, described n is less than or equal to 3

Adopt technique scheme, technical scheme provided by the present invention has been considered the disturbance coordination method between fairness and sector, specific as follows:

(1) use the mode of poll to carry out rotation priority scheduling, reduce computation complexity, accomplish fairness between sector as far as possible.

(2) use improvement SLINR to carry out determining of precoding and user's scheduling, take into account and considered that SINR maximizes and minimization principle is revealed in interference.

(3) by combining all user situations of considering a plurality of communities, determine the user of cooperative transmission and concrete precoding, thereby emphasis promotes the spectrum efficiency of cell edge.

Accompanying drawing explanation

Fig. 1 is one embodiment of the invention schematic diagram;

Fig. 2 is another embodiment schematic diagram.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

The user scheduling method that the invention provides a kind of cooperative multipoint transmission COMP technology, comprises following steps:

Total K resource

For resource 1, to cooperation set of sectors 1,2 ..., m proceeds as follows:

Step 1 is iteration for the first time

Step 1.1 pair sector 1, is used single sector scheduling method to dispatch out user 1;

Step 1.2 pair sector 2, according to sector 1 scheduled user's 1 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 2;

Step 1.3 pair sector 3, according to sector 1,2 scheduled users' 1,2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

......

Step 1.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1,2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 2 is iteration for the second time

Step 2.1 pair sector 1, according to sector 2 ..., m-1, m scheduled user 2 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ²';

Step 2.2 pair sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ²', 3 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ²';

Step 2.3 pair sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ²', 2 ²' ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ²';

......

Step 2.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ²', 2 ²' ..., m-1 ²' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ²';

......

The n time iteration of step n

Step is n.1 to sector 1, according to sector 2 ..., m-1, m scheduled user 2 ^n-1' ..., m-1 ^n-1', m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ⁿ';

Step is n.2 to sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ⁿ, 3 ^n-1' ..., m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ⁿ';

Step is n.3 to sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ⁿ, 2 ⁿ, 4 ^n-1' ..., m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ⁿ';

......

Step n.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ⁿ', 2 ⁿ..., m-1 ⁿ' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ⁿ';

For resource 2, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 2 is being dispatched, the dispatching method of other cooperation set of sectors is identical with the operation in resource 1:

Iteration for the first time

Step 1.1 pair sector 2, is used single sector scheduling method to dispatch out user 2;

Step 1.2 pair sector 3, according to sector 2 scheduled users' 2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

......

Step 1.m-1 is to sector m, according to sector 2 ..., m-1 scheduled user 2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 1.m is to sector 1, according to sector 2 ..., m scheduled user 2 ..., m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1;

......

For resource 3, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 3 is dispatched, other are identical with the operation of resource 1.

......

For resource K, in each iteration, first sector (K mod m) to be dispatched, the class of operation of other and resource 1 is seemingly.

Wherein, m represents sector and corresponding user, and n represents iterations.

Due to cooperative multipoint transmission need to be between a plurality of base stations transmission information, between base station, the characteristic of return link directly affects the performance of cooperative multipoint transmission.So in concrete research, generally according to tunable sector, whether belong to same base station, be divided into, coordinate the base station in and base station between coordinate, this programme is applicable between coordination and base station, coordinate in base station.

Fig. 1 is the schematic flow sheet that carries out user's scheduling and precoding between lower 3 sectors, same base station (sector1, sector2, sector3).As shown in Figure 3, user is divided into coordinates user and non-coordinates user according to certain criterion.Coordinates user represents that a plurality of base stations are worked in coordination with and transmits data for this user, non-coordinates user represents that the same moment only has a base station to transmit data for this user, system is only considered the situation of serving BS when determining resource, precoding etc. for user, does not need to consider the scheduling situation of other sectors.Such as, the RSRP signal strength signal intensity receiving according to user is determined its coordination base station, take threshold value 10dB as example, meets following formula

RSRP _i-max(RSRP _k)<10dB

And in base station user be greater than 1 be all coordinates user, the coordination collection that the base station that meets formula is this user.This method does not relate to definite method of concrete coordination collection.

Particular user scheduling and precoding determine that flow process is as follows:

Iteration for the first time

To sector 1, use single sector scheduling method to dispatch out user 1;

To sector 2, according to sector 1 scheduled user's 1 information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user 2;

To sector 3, according to sector 1,2 scheduled users' 1,2 information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user 3;

Iteration for the second time

To sector 1, to sector 1, according to sector 2,3 scheduled users' 2,3 information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user 1';

To sector 2, according to sector 1,3 scheduled user 1', 3 information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user 2';

To sector 3, according to the information of sector 1,2 scheduled user 1', 2', use and improve the precoding that SLINR determines user, dispatch, dispatch out user 3';

......

The n time iteration

To sector 1, according to sector 2,3 scheduled users' information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user;

To sector 2, according to sector 1,3 scheduled users' information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user;

To sector 3, according to sector 1,2 scheduled users' information, use and improve the precoding that SLINR determines user, dispatch, dispatch out user.

For Resource Block 1, proceed as follows

Iteration 1

1. the Resource Block 1 of pair sector 1, according to single sector dispatching algorithm (as PF algorithm), dispatch out user, note is user 1, this user's precoding is determined (as SINR maximization principle) according to single sector method for precoding, as, this method does not relate to concrete single sector scheduling method and single sector method for precoding;

2. same resource of pair sector 2 dispatched, and according to sector, whether 1 scheduled user 1 is coordinates user, carries out different processing:

(1) if user 1 is the coordination set of sectors that non-coordinates user or sector 2 do not belong to user 1, according to single sector dispatching algorithm, be sector 2 dispatched users, note is user 2, and this user's precoding is determined according to single sector method for precoding;

(2) if user 1 is coordinates user, and sector 2 belongs to user 1 coordination set of sectors, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 2, concrete grammar be all users for sector 2 according to maximization principle,

$\mathrm{SLINR}\left(V_2\right)=\frac{\mathrm{tr}\left(V_2^H{R}_2^2{V}_2\right)}{\mathrm{tr}\left(V_2^H\left({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^2\right)V_2\right)+\mathrm{\&alpha;}+I_{02}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 2.

3. according to the scheduling result of sector 1 and sector 2, sector 3 is dispatched.Similar with (2), according to sector 3, whether belong to user 1 and user's 2 coordination sector, carry out different processing:

(1), if sector 3 belongs to user 1,2 coordination set of sectors, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 3, concrete grammar is that all users for sector 3 are according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^3+\frac{{\mathrm{<figure-callout\; id="1"\; label="I\; o"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">I</figure-callout>}}_o^1}{I_{o2}^{3-}}*R_2^3)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3.

In above formula,

represent that user 2 receives total interference total interference of strong several interference sectors (or), wherein do not comprise and come from sector 1 and disturb.The total interference that has been equivalent to like this use user 1 and user 2 to receive, to user 1 and user 2 being subject to the leakage of sector 3, disturbing and carried out weighting respectively, leakage large especially for total interference like this, that investigate disturbs L to affect therein very little user, and consideration that just can be too much has been coordinated between the sector for this user.

(2) if sector 3 belongs to user 1 coordination set of sectors, the coordination set of sectors that does not belong to user 2, according to improve SLINR maximization principle determine the scheduled user of sector 3 and precoding (method and 2(2) similar), only need between sector 1 and sector 3, coordinate, concrete grammar is that all users for sector 3 are according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' coding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3.

(3) if sector 3 belongs to user 2 coordination set of sectors, the coordination set of sectors that does not belong to user 1, according to improve SLINR maximization principle determine the scheduled user of sector 3 and precoding (method and 2(2) similar), only need between sector 2 and sector 3, coordinate, concrete grammar is that all users for sector 3 are according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left(R_2^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Wherein,

the Eigenvalues Decomposition of eig representing matrix, I is unit frame;

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3.

Iteration 2

According to the scheduling situation of sector 2,3, sector 1,2,3 is readjusted.Its rule is for according to two user profile that dispatch out sector before current sector, uses improved SLINR to determine user's precoding, dispatches out the user of current sector.

1. adjustment is dispatched in pair sector 1: according to the scheduling of 2,3 pairs of sectors 1 of user of sector 2,3 scheduling, adjust.

(1) sector 1 belongs to the coordination collection of user 2 and 3, and according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 1, concrete grammar is that all users for sector 1 are according to maximization principle

$\mathrm{SLINR}\left(V_1\right)=\frac{\mathrm{tr}\left(V_1^{\mathrm{<figure-callout\; id="1"\; label="H\; R"\; filenames="HDA00002091730800012.png"\; state="\{\{state\}\}">H</figure-callout>}}{R}_{}^{}{}_1^1{V}_1\right)}{\mathrm{tr}\left(V_1^H(R_2^1+\frac{I_{o2}^{1-}}{I_{o3}^{1-}}*R_3^1)V_1\right)+\mathrm{\&alpha;}+I_{01}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 1 '.

......

2. adjustment is dispatched in pair sector 2, adjusts, as said method is dispatched out user 2 ' according to sector 1 scheduling for 1 ' with the scheduling of 33 pairs of sectors 2 of dispatched users, sector.

3. adjustment is dispatched in pair sector 3: according to sector 1 dispatched users 1 ' and sector 2 dispatched users 2 ', the scheduling of sector 3 is adjusted, for dispatching out user 3 ' in sector 3.

Carry out according to the method described above iteration 3 ..., iteration n.

Determine after the dispatched users and corresponding precoding of sector 1,2,3 the CQI(channel quality indication according to precoding to scheduled user) continue to adjust, select suitable modulation coding mode on Resource Block 1, to carry out transfer of data.

The method of adjustment of other Resource Block is identical with Resource Block 1.

Fig. 2 is coordinated scheduling method schematic diagram between base station, as shown in Figure 2, adopts the user scheduling method of cooperative multipoint transmission COMP technology provided by the present invention, is not only applicable to coordinate in base station, is also suitable for equally coordinating between base station.

In this dispatching method, improvement SLINR is

$\mathrm{SLINR}\left(V_i\right)=\frac{\mathrm{tr}\left(V_i^H{R}_i^i{V}_i\right)}{\mathrm{tr}\left(V_i^H(\underset{s\&Element;S}{\mathrm{\&Sigma;}}\frac{I_{{\mathrm{os}}_1}^{i-}}{I_{\mathrm{os}}^{i-}}*R_j^i)V_i\right)+\mathrm{\&alpha;}+I_{0i}}$

In formula, V _irepresent the pre-coding matrix that user i is used,

represent that sector j is to the channel covariance matrices that comprises channel large scale information of user k, α represents white Gaussian noise power, I _0irepresent that user i is subject to the interference from other sectors,

representing that user x receives does not comprise the total interference that comes from total interference of sector i or do not comprise the strongest several interference sectors that come from sector i, V ^hthe conjugate transpose that represents V, tr (A) represents to ask the mark of square formation, refer to A each element of leading diagonal and, user's collection of each sector scheduling in the coordination set of sectors that s is i, s ₁for user collects a user in s.

The user scheduling method of cooperative multipoint transmission COMP technology provided by the present invention, iteration general execution 1-3 time, amount of calculation is less, adopts the mode of poll to carry out priority scheduling between sector, guarantees the fairness between sector.By combining all user situations of considering a plurality of communities, determine the user of cooperative transmission and concrete precoding, thereby emphasis promotes the spectrum efficiency of cell edge.

The user scheduling method of cooperative multipoint transmission COMP technology provided by the present invention, adopt repeatedly iteration, to the first sector of iteration for the first time, adopt single sector scheduling method to dispatch, the user profile that other sectors are dispatched out with two sectors before current sector is dispatched current sector, dispatches out active user.Taken into account the principle of disturbing minimum and maximum capacity, computation complexity reduces, and speed speeds, and has guaranteed to greatest extent the fairness between sector.

The above embodiment has only expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (9)

1. a user scheduling method for cooperative multipoint transmission COMP technology, is characterized in that:

Total K resource

For resource 1, to cooperation set of sectors 1,2 ..., m proceeds as follows:

Step 1 is iteration for the first time

Step 1.1 pair sector 1, is used single sector scheduling method to dispatch out user 1;

Step 1.2 pair sector 2, according to sector 1 scheduled user's 1 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 2;

Step 1.3 pair sector 3, according to sector 1,2 scheduled users' 1,2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

Step 1.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1,2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 2 is iteration for the second time

Step 2.1 pair sector 1, according to sector 2 ..., m-1, m scheduled user 2 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ²';

Step 2.2 pair sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ²', 3 ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ²';

Step 2.3 pair sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ²', 2 ²' ..., m-1, m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ²';

......

Step 2.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ²', 2 ²' ..., m-1 ²' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ²';

......

The n time iteration of step n

Step is n.1 to sector 1, according to sector 2 ..., m-1, m scheduled user 2 ^n-1' ..., m-1 ^n-1', m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1 ⁿ';

Step is n.2 to sector 2, according to sector 1,3 ..., m-1, m scheduled user 1 ⁿ', 3 ^n-1' ..., m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 2 ⁿ';

Step is n.3 to sector 3, according to sector 1,2,4 ..., m-1, m scheduled user 1 ⁿ', 2 ⁿ', 4 ^n-1' ..., m ^n-1' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 3 ⁿ';

......

Step n.m is to sector m, according to sector 1,2 ..., m-1 scheduled user 1 ⁿ', 2 ⁿ' ..., m-1 ⁿ' information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m ⁿ';

For resource 2, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 2 is being dispatched, the dispatching method of other cooperation set of sectors is identical with the operation in resource 1:

Iteration for the first time

Step 1.1 pair sector 2, is used single sector scheduling method to dispatch out user 2;

Step 1.2 pair sector 3, according to sector 2 scheduled users' 2 information, is used and improves the precoding that SLINR determines user, dispatches, and dispatches out user 3;

......

Step 1.m-1 is to sector m, according to sector 2 ..., m-1 scheduled user 2 ..., m-1 information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user m;

Step 1.m is to sector 1, according to sector 2 ..., m scheduled user 2 ..., m information, use to improve the precoding that SLINR determines user, dispatch, dispatch out user 1;

......

For resource 3, to cooperation set of sectors 1,2 ..., m, in each iteration, first sector 3 is dispatched, other are identical with the operation of resource 1;

......

For resource K, in each iteration, first sector (K mod m) to be dispatched, the class of operation of other and resource 1 is seemingly;

Wherein, m represents sector and corresponding user, and n represents iterations.

2. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1, is characterized in that: described improvement SLINR is

$\mathrm{SLINR}\left(V_i\right)=\frac{\mathrm{tr}\left(V_i^H{R}_i^i{V}_i\right)}{\mathrm{tr}\left(V_i^H(\underset{s\&Element;S}{\mathrm{\&Sigma;}}\frac{I_{{\mathrm{os}}_1}^{i-}}{I_{\mathrm{os}}^{i-}}*R_j^i)V_i\right)+\mathrm{\&alpha;}+I_{0i}}$

Wherein, V _irepresent the pre-coding matrix that user i is used,

represent that sector j is to the channel covariance matrices that comprises channel large scale information of user k, α represents white Gaussian noise power, I _0irepresent that user i is subject to the interference from other sectors,

representing that user x receives does not comprise the total interference that comes from total interference of sector i or do not comprise the strongest several interference sectors that come from sector i, V ^hthe conjugate transpose that represents V, tr (A) represents to ask the mark of square formation, refer to A each element of leading diagonal and, user's collection of each sector scheduling in the coordination set of sectors that s is i, s ₁for user collects a user in s.

3. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, is characterized in that: described single sector scheduling method adopts PF algorithm.

4. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, is characterized in that: described user's 1 precoding is determined according to single sector method for precoding.

5. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 4, is characterized in that: described single sector method for precoding is SINR maximization principle.

6. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, is characterized in that described user's 2 dispatching method, and when coordinating sector while being 3, method is as follows:

The Resource Block 1 of step 1 pair sector 1, according to single sector dispatching algorithm, dispatches out user, and note is user 1;

Same resource of step 2 pair sector 2 dispatched, and according to sector, whether 1 scheduled user 1 is coordinates user, carries out different processing:

If i. user 1 is the coordination set of sectors that non-coordinates user or sector 2 do not belong to user 1, is sector 2 dispatched users according to single sector dispatching algorithm, note is user 2, and this user's precoding is determined according to single sector method for precoding;

II. if user 1 is coordinates user, and sector 2 belongs to user 1 coordination set of sectors, and, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 2, concrete grammar is: for all users of sector 2 according to maximization principle

$\mathrm{SLINR}\left(V_2\right)=\frac{\mathrm{tr}\left(V_2^H{R}_2^2{V}_2\right)}{\mathrm{tr}\left(V_2^H\left(R_1^2\right)V_2\right)+\mathrm{\&alpha;}+I_{02}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 2.

7. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, the dispatching method that it is characterized in that described user 3, when coordination sector number is 3, method is: according to the scheduling result of sector 1 and sector 2, sector 3 is dispatched, according to sector 3, whether belong to user 1 and user's 2 coordination sector, carry out different processing;

If sector 3 belongs to user 1,2 coordination set of sectors, according to the scheduled user and the precoding that improve SLINR maximization principle and determine sector 3, concrete grammar is, for all users of sector 3 according to maximization principle,

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H(R_1^3+\frac{I_{o1}^{3-}}{I_{o2}^{3-}}*R_2^3)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3;

If sector 3 belongs to user 1 coordination set of sectors, the coordination set of sectors that does not belong to user 2, according to improvement SLINR maximization principle, determine scheduled user and the precoding of sector 3, only need between sector 1 and sector 3, coordinate, concrete grammar is, for all users of sector 3 according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left(R_1^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3;

If sector 3 belongs to user 2 coordination set of sectors, the coordination set of sectors that does not belong to user 1, according to improvement SLINR maximization principle, determine scheduled user and the precoding of sector 3, only need between sector 2 and sector 3, coordinate, concrete grammar is, for all users of sector 3 according to maximization principle

$\mathrm{SLINR}\left(V_3\right)=\frac{\mathrm{tr}\left(V_3^H{R}_3^3{V}_3\right)}{\mathrm{tr}\left(V_3^H\left(R_2^3\right)V_3\right)+\mathrm{\&alpha;}+I_{03}}$

Determine all users' precoding, and dispatch according to this collaborative definite precoding and single sector dispatching principle, determine dispatched users, note is user 3.

8. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, is characterized in that: described iteration is for the second time for re-starting adjustment according to sector 2 to the scheduling situation of sector m to sector 1 to sector m.

9. the user scheduling method of cooperative multipoint transmission COMP technology according to claim 1 and 2, is characterized in that: described n is less than or equal to 3.

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