CN104956708A - Method and apparatus for interference coordination in heterogeneous network - Google Patents

Abstract

Embodiments of the disclosure provide a method and apparatus for interference coordination in a heterogeneous network. The method may comprise: obtaining types of a plurality of UE in the heterogeneous network, wherein the heterogeneous network comprises at least one macro BS and at least one LPN, and wherein each of the types is macro central area type, macro non-central area type, LPN central area type, or LPN non-central area type; and determining one or more user pairs from the plurality of UEs based on the obtained types, such that the plurality of UEs are scheduled based on the one or more user pairs to reduce inter-cell interference.

Description

For the method and apparatus of the interference coordination in heterogeneous network

Technical field

The embodiments of the invention relate generally to communication technology.More specifically, embodiments of the invention relate to the method and apparatus for the interference coordination in heterogeneous network.

Background technology

Along with the exploitation of subscriber equipment (UE) and the diffusion of bandwidth intensive application, the business load in cellular network increases in unexpected mode.Recently, the new frame of heterogeneous network (HetNet) receives much concern, and this has become the flexible and effective mode of cost of process blast and unbalanced wireless data service demand.By superpose in the coverage that is included in macrocell, the such as low power nodes (LPN) of femto base station (BS), femto BS, via node and remote radio heads (RRH) and so on disposes heterogeneous network.

In order to make full use of the effect of low power nodes and balance the user load of macrocell, in HetNet, introduce the concept that the scope for low power nodes community is expanded.Particularly, when UE is making the decision of association, down link (DL) interference signal intensity (RSS) to low power nodes pilot signal is increasing positive scope expansion biased (REB).As a result, even if under the DL link-quality of grand BS (MBS) is in favourable condition, then UE may be associated with low power nodes.This will contribute to the employing of load balance and spatial reuse, and contributes to alleviating up link (UL) presence of intercell interference by reducing UL transmitting power.But, in downlink phase, the having a strong impact on of DL presence of intercell interference that the UE in range expansion area will be subject to from MBS.Therefore, exploitation is used for the Inter-Cell Interference Coordination technology of HetNet is important.

3GPP Long Term Evolution (LTE) version 10 standard criterion have employed almost blank subframe (ABS) technology partly to solve this problem, which define a new subframe, do not allow the transmission on physics DL shared channel (PDSCH) from MBS at this new subframe place.In order to effectively use ABS, low power nodes must have the perfect knowledge of abs mode, to carry out suitable user scheduling.Except this strategy, the interference based on Limited Feedback of such as best of breed cluster controls (IC) and is also widely studied, and extends to HetNet.But these schemes comprise too much undesirable expense, and the loss of the degree of freedom that user is matched will be caused.

In view of the above problems, need to develop the interference coordination schemes in heterogeneous network, so that effectively and improve the performance of heterogeneous network efficiently.

Summary of the invention

The present invention proposes the solution of the interference coordination schemes of a kind of exploitation in heterogeneous network.Particularly, The embodiment provides the method and apparatus for the interference coordination in heterogeneous network, it can improve the performance of heterogeneous network effectively, and the degree of freedom reducing undesirable expense and improve for user's pairing.

According to a first aspect of the invention, The embodiment provides a kind of method for the interference coordination in heterogeneous network.The method can comprise: the type obtaining the multiple UE in heterogeneous network, wherein this heterogeneous network comprises at least one grand BS and at least one LPN, and each type wherein in the type is grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN; And from multiple UE, determine one or more user couple based on obtained type, make based on one or more user dispatching multiple UE to reduce presence of intercell interference.

According to a second aspect of the invention, The embodiment provides a kind of device for the interference coordination in heterogeneous network.This device can comprise: getter, be configured to the type of the multiple UE obtained in heterogeneous network, wherein this heterogeneous network comprises at least one grand BS and at least one LPN, and each type wherein in the type is grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN; And determiner, being configured to from multiple UE, determine one or more user couple based on obtained type, making based on one or more user dispatching multiple UE to reduce presence of intercell interference.

When reading by reference to the accompanying drawings, other feature and advantage of embodiments of the invention also will be apparent from the description of following characteristics embodiment, and accompanying drawing illustrates the principle of embodiments of the invention by way of example.

Accompanying drawing explanation

Embodiments of the invention propose in the meaning of example, and further illustrate the advantage implementing embodiments of the invention below with reference to accompanying drawing, wherein

Fig. 1 illustrates the schematic diagram of heterogeneous network 100 according to an embodiment of the invention;

Fig. 2 illustrates according to an embodiment of the invention for the flow chart of the method 200 of the interference coordination in heterogeneous network;

Fig. 3 illustrates the flow chart of the method 300 of the type for obtaining the UE in heterogeneous network according to another embodiment of the present invention;

Fig. 4 illustrates the flow chart for determining method 400 that user is right from UE according to still another embodiment of the invention;

Fig. 5 illustrates according to an embodiment of the invention for the block diagram of the device 500 of the interference coordination in heterogeneous network;

Fig. 6 A and Fig. 6 B respectively illustrates and coordinates according to the Average Relative Speed loss of some embodiments of the present invention and LPN user the schematic diagram that is biased;

Fig. 7 A and Fig. 7 B respectively illustrates and coordinates according to the Average Relative Speed loss of other embodiments more of the present invention and LPN user the schematic diagram that is biased;

Fig. 8 A and Fig. 8 B respectively illustrates and coordinates according to the Average Relative Speed loss of some embodiments of the present invention and grand user the schematic diagram that is biased; And

Fig. 9 A and Fig. 9 B respectively illustrates and coordinates according to the Average Relative Speed loss of other embodiments more of the present invention and grand user the schematic diagram that is biased.

In whole accompanying drawing, same or analogous Reference numeral indicates same or analogous element.

Embodiment

Hereinafter all sidedly embodiments of the invention are described with reference to accompanying drawing.But, it will be apparent to those skilled in the art that the present invention can realize in many different forms, and should not be construed as limited to the embodiment and detail set forth here.In the description, identical Reference numeral refers to identical element.

Various embodiment of the present invention is specifically described with reference to accompanying drawing.Flow chart in accompanying drawing and block diagram illustrate devices in accordance with embodiments of the present invention, method and the framework performed by computer program, function and operation.In this, each frame in flow chart or frame can represent the module of the one or more executable instructions comprised for performing specific logical function, a part for journey logic bomb.It should be noted that the function indicated in frame can be different from occurring in sequence of the order shown in accompanying drawing in some substitute.Such as, in fact two frames illustrated continuously can come substantially to perform concurrently or in reverse order according to correlation function.Shall also be noted that each frame in block diagram and/or flow chart and combination thereof can realize by the system based on specialized hardware for performing specific function/operation or by the combination of specialized hardware or computer instruction.

The feature of the present invention, structure or the feature that describe in this specification can be combined in any suitable manner in one or more embodiments.Such as, phrase " some embodiments ", " in some other embodiments " or other similar language are used to refer to the following fact in this manual: the specific features in conjunction with the embodiments described, structure or feature can be included at least one embodiment of the present invention.

Embodiments of the invention can be applied to heterogeneous network, include but not limited to LTE system.When the fast development communicated, certainly also existence can be used it to the wireless communication technology and the system that realize future type of the present invention.Should not be considered as scope of the present invention and be only restricted to aforementioned system.

In the disclosure, base station (BS) can refer to the Node B (eNodeB or eNB) of Node B (Node B or NB) or evolution.Base station can be grand BS or LPN (that is, small cell BS).According to the present invention, grand BS can be the base station of management macrocell, such as grand eNB, and small cell BS can be the base station of management small cell, such as, and slight eNB, femto eNB, via node, RRH BS and some other suitable low power nodes.

In the disclosure, subscriber equipment (UE) can refer to terminal, mobile terminal (MT), subscriber station (SS), portable subscriber station (PSS), mobile radio station (MS) or access terminal (AT), and can comprise some or all functions of UE, terminal, MT, SS, PSS, MS or AT.

The embodiment provides a kind of method and apparatus for Stochastic accessing in the wireless network.According to embodiments of the invention, first obtain the type of the UE in heterogeneous network, and then can determine (one or more) user couple based on its type from UE.By dispatching determined (one or more) user couple according to embodiments of the invention, the cross-layer interference between macrocell and small cell can be sufficiently decreased.In like fashion, good the trading off between unity gain and expense can be adopted.Now, below with reference to accompanying drawing, exemplary embodiments more of the present invention are described.

First the schematic diagram of heterogeneous network 100 is according to an embodiment of the invention illustrated with reference to figure 1, Fig. 1.

In FIG, heterogeneous network 100 is exemplarily illustrated as and is comprised grand BS 110 and three LPN 120,130 and 140.The coverage of each LPN in the coverage of macrocell or at least in part with the overlapped coverage of macrocell.5 UE 101-105 are exemplarily shown in heterogeneous network 100, and each has different types.These UE101-105 can from the one or more BS Received signal strength heterogeneous network 100.Such as, one or more UE 101-105 can from grand BS 110, LPN 120, LPN 130 and/or LPN140 Received signal strength.

Although it should be noted that, in heterogeneous network 100, grand BS and three LPN has been shown, in fact can there is the grand BS of unnecessary in heterogeneous network 100, and more or less LPN can be disposed.Although shall also be noted that, in heterogeneous network 100,5 UE 101-105 have been shown, it is example instead of restriction.It will be understood by those skilled in the art that more or less UE is applicable to interference coordination schemes according to an embodiment of the invention.

In order to better understanding, based on the heterogeneous network shown in Fig. 1, following examples of the present disclosure are described.As will be understood by the skilled person in the art, the disclosure goes for any other suitable heterogeneous network, but is not limited to the specific arrangements shown in Fig. 1.

With reference now to Fig. 2, Fig. 2, illustrate the flow chart of the method 200 for interference coordination according to an embodiment of the invention in heterogeneous network.Heterogeneous network can comprise at least one grand BS and at least one LPN, such as, and heterogeneous network 100 shown in Figure 1.According to embodiments of the invention, the method 200 can by grand BS, LPN, controller, central location, server, UE or other anyly can to perform by application apparatus.

In step S201, obtain the type of the multiple UE in heterogeneous network.

The type of UE can be defined in a number of ways.According to embodiments of the invention, the type of UE can be grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN.Such as, the type for the UE in grand central area, this UE can be grand central area type.Similarly, the type for the UE in grand non-central region, LPN central area or the non-central region of LPN, this UE can be grand non-central area type, LPN central area type or the non-central area type of LPN.

As shown in Figure 1, in heterogeneous network 100, UE 101 is positioned at grand central area, and therefore the type of UE 101 is grand central area types.Therefore, because UE 102 is arranged in the non-central region of LPN, UE 103 is arranged in grand non-central region, UE 104 is arranged in the non-central region of LPN and 105 be positioned at LPN central area, so can determine that the type of UE 102 is the non-central area types of LPN, the type of UE 103 is grand non-central area types, the type of UE 104 is the non-central area types of LPN, and the type of UE 105 is LPN central area types.

According to embodiments of the invention, the type of the multiple UE in heterogeneous network can be obtained in many ways.In certain embodiments, the type of UE can be determined by grand BS, LPN, controller, central location, server, UE etc.Like this, the type obtaining UE can comprise the steps: that obtaining LPN user coordinates to be biased; Obtain grand user to coordinate to be biased; Obtain the first signal strength signal intensity and the secondary signal intensity of each UE in multiple UE, wherein the first signal strength signal intensity indicates the intensity of the signal received from LPN at each UE place, and secondary signal intensity indicates the intensity of the signal received from grand BS at each UE place; And coordinate to be biased based on LPN user, grand user coordinates to be biased, the first signal strength signal intensity and secondary signal intensity determine each UE type.Other details of the type for determining UE can be found in reference to figure 3 illustrated embodiment.

In some other embodiments, can by the following acquisition realizing the type of UE: receive the information about the type of UE from UE; And/or receive the information about the type of UE from grand BS or LPN served UE.Such as, when the type of UE itself is determined by this UE, the device (such as, grand BS, LPN, controller, central location, server etc.) of manner of execution 200 from the information of UE reception about the type of UE, and can need not determine the type of UE.For another example, when the type of UE be by grand BS determine time, the device (such as, LPN, controller, central location, server, UE etc.) of manner of execution 200 can receive information about the type of UE from grand BS.

In step S202, determining the one or more users couple in multiple UE based on obtained type, making based on one or more user dispatching multiple UE to reduce presence of intercell interference.

Referring again to Fig. 1, when knowing the type of UE 101-105, one or more user couple can be determined according to embodiments of the invention from UE 101-105.By adopting determined user couple in scheduling, the presence of intercell interference in heterogeneous network 100 effectively can be reduced.Other details can be found in the description in combination with Fig. 4 illustrated embodiment.

With reference now to Fig. 3, Fig. 3, illustrate the flow chart of the method 300 of the type for obtaining the UE in heterogeneous network according to another embodiment of the present invention.Method 300 can be considered to the embodiment of the step S201 that above reference diagram 2 describes.In the following description of method 300, coordinate biased sum and the first signal strength signal intensity and scope and expand biased sum by secondary signal intensity and the first signal strength signal intensity and LPN user being coordinated biased sum, the first signal strength signal intensity and grand user and compare the type determining UE.Note, however, this is only for illustration of principle of the present invention instead of the object limiting its scope.

After method 300 starts, in step S301, obtain LPN user and coordinate to be biased.

According to embodiments of the invention, LPN user can be obtained in a number of ways and coordinate to be biased.

In certain embodiments, can pre-define or preset LPN user to coordinate to be biased.Such as, LPN user coordinates biased can pre-setting according to the experience in operator or those skilled in the art; LPN user coordinates biased can also pre-defining according to the concrete communication conditions of heterogeneous network.It should be noted that above-mentioned example is described for illustrating, and LPN user coordinates biased can acquisition with additive method in addition to the examples above.

In some other embodiments, can determine that LPN user coordinates to be biased by following: obtain by belonging to the non-central area type of LPN and the first rate that realizes of the UE performing Inter-Cell Interference Coordination and by belonging to the non-central area type of LPN and the second speed of realizing of the UE not performing Inter-Cell Interference Coordination; And determine that user coordinates to be biased based on first rate and the second speed.According to embodiments of the invention, can determine that LPN user coordinates to be biased based on first rate and the second speed as follows.First, Average Relative Speed loss can first be calculated based on first rate and the second speed; Then, the one or more saturation points about Average Relative Speed loss can be determined; And then, based on one or more saturation point, the candidate in multiple candidate can be selected as LPN user and coordinate to be biased.According to embodiments of the invention, saturation point instruction consider the candidate that LPN user coordinates to be biased, the sharply change of Average Relative Speed loss.Coordinate the multiple candidates be biased about LPN user, one or more saturation point can be there is.

According to embodiments of the invention, first rate instruction is by belonging to the non-central area type of LPN and the speed that realizes of the UE performing Inter-Cell Interference Coordination.In some embodiments of the invention, for being served by LPN and belonging to the UE (also referred to as " LPN UE ") of the non-central area type of LPN, first rate (is expressed as ) indicate the speed realized by the UE performing Inter-Cell Interference Coordination.Note, LPN user coordinate biased really regularly between, LPN user is coordinated biasedly can there is multiple candidate.About a candidate, the type of UE can be determined.Like this, can determine whether UE has the non-central area type of LPN.In some embodiments of the invention, for the UE served by LPN (also referred to as " LPN UE "), particularly, there is the non-central area type of LPN and perform the UE of Inter-Cell Interference Coordination, the first rate realized by UE can be calculated as follows and (be expressed as )

$R_{IC}^{\mathrm{\θ}}={\log }_2(1+\frac{P_r{\mathrm{\α}}_{i,r}^r\left|\right|{\left(h_{i,r}^r\right)}^H{w}_i^r|{|}^2}{{\mathrm{\σ}}^2+P_m{\mathrm{\α}}_{i,r}^m\left|\right|{\left(h_{i,r}^m\right)}^H{w}_{i,r}^m|{|}^2})---\left(1\right)$

Wherein represent the beam-shaper being used for i-th LPN UE;

represent the Beam-former of the interference coordination of i-th the LPN UE being used for grand BS;

P _mand P _rrepresent the transmitting power of grand BS and LPN respectively;

represent the extensive fading coefficients from grand BS to i-th LPN UE;

represent the extensive fading coefficients from LPN to i-th LPN UE;

represent the small-scale fading coefficients from grand BS to i-th LPN UE;

represent the small-scale fading coefficients from LPN to i-th LPN UE; And

σ ²represent the variance of zero-mean additive white Gaussian noise.

According to embodiments of the invention, the second speed instruction is by belonging to the non-central area type of LPN and the speed that realizes of the UE not performing Inter-Cell Interference Coordination.According to embodiments of the invention, the second speed can be calculated by following formula

$R_{WIC}^{\mathrm{\θ}}={\log }_2(1+\frac{P_r{\mathrm{\α}}_{i,r}^r\left|\right|{\left(h_{i,r}^r\right)}^H{w}_i^r|{|}^2}{{\mathrm{\σ}}^2+P_m{\mathrm{\α}}_{i,r}^m})---\left(2\right)$

By using the first rate and the second speed that are such as calculated by equation (1) and (2), Average Relative Speed loss can be calculated as follows

$\frac{R_{IC}^{\mathrm{\θ}}-R_{WIC}^{\mathrm{\θ}}}{R_{IC}^{\mathrm{\θ}}}.$

According to embodiments of the invention, LPN user can be calculated based on Average Relative Speed loss as follows and coordinate to be biased (being expressed as θ):

Wherein θ ₀it is the optimum value coordinating biased θ acquisition according to equation (3) for LPN user; And ξ is defined as the LPN cooperation relative gain factor, its instruction and the optimum value θ being biased θ for LPN user collaboration ₀corresponding Average Relative Speed loss.

According to embodiments of the invention, the one or more saturation points about Average Relative Speed loss can be determined, wherein saturation point instruction consider the candidate that LPN user coordinates to be biased, the sharply change of Average Relative Speed loss; And then, a candidate can be selected from multiple candidate to be used as LPN user based on one or more saturation point to coordinate to be biased.

Respectively illustrate with reference to figure 6A and Fig. 6 B, Fig. 6 A and Fig. 6 B and coordinate according to the Average Relative Speed loss of some embodiments of the present invention and LPN user the schematic diagram that is biased.

Fig. 6 A and Fig. 6 B shows along with LPN user coordinates the different candidate of biased θ and the Average Relative Speed loss changed.Usually, Average Relative Speed loss reduces along with the reduction of θ.But relative unity gain diminishes gradually, and observe bottom, wherein interference is avoided becoming not too important to system enhancement.This causes due to the following fact: along with θ reduces, the difference of increase that the user in coordinated regions will have between the RSRP from grand BS and RRH node, result in the reduction of interference coordination efficiency.The behavior instruction of this average relative loss expands collaboration region and can not bring very large gain.Some saturation points of the reasonable tradeoff that can be implemented between gain and cost may be there are.

According to embodiments of the invention, the key factor affecting the behavior of relative velocity loss can comprise the ability of interference coordination strategy, LPN (such as, RRH) position (supposing that the transmitting power of RRH node and grand BS is fixing) etc.Adopt different codebook size, i.e. 32 or 64 (as shown in Figure 6 A and 6 B) or adopt the different distance between grand BS and LPN (as shown in figures 7 a and 7b) that the different range of the value for Average Relative Speed loss can be produced.But, the common observation that it should be noted that in these accompanying drawings be Mean Speed loss slope along with θ reduce only among a small circle special sharply.This means, only in this range, interference coordination will bring very large gain and is very effective.Based on this observation, can determine based on the point terminating this sharply scope of slope that LPN user coordinates biased and LPN and to cooperate related gain factor ξ, so that realize the good compromise between unity gain and cost.In an embodiment of the present invention, such point is called as saturation point, each instruction wherein consider the candidate that LPB user coordinates to be biased, the sharply change of Average Relative Speed loss.As shown in Figure 6A, crosspoint S1 and S2 is saturation point.According to embodiments of the invention, can determine that LPN user coordinates the value of biased θ based on saturation point S1 and S2.In certain embodiments, a target saturation point can be selected from these saturation points, and can determine that LPN user coordinates biased θ according to target saturation point.Such as, can select to indicate consider the candidate that LPN user coordinates to be biased, the saturation point of the change the most sharply of Average Relative Speed loss is used as the saturation point of target.As shown in Figure 6A, the second oblique line l ₂with the 3rd oblique line l ₃between crosspoint, i.e. saturation point S2, can be confirmed as target saturation point, because its instruction is than at the first oblique line l ₁with the second oblique line l ₂between crosspoint (that is, saturation point S1) change more sharply.Based target saturation point S2, can determine that LPN user coordinates biased θ is-6 (that is, θ ₀, and the corresponding average relative proportion of goods damageds (that is, LPN cooperate with relative gain factor ξ) are 0.375=-6).

As mentioned above, the factor that may affect the behavior of Average Relative Speed loss comprises the ability of such as interference coordination strategy, LPN position (supposing that the transmitting power of LPN and grand BS is fixing) etc.In certain embodiments, the behavior of Average Relative Speed loss may be subject to the impact of adopted codebook size.As shown in the figure, the codebook size used in the embodiment relevant to Fig. 6 A is 32, and the codebook size used in the embodiment relevant to Fig. 6 B is 64.As shown in Figure 6B, there are two saturation point S3 and S4, it can indicate the different range of the value for Average Relative Speed loss.

In some other embodiments, the behavior of Average Relative Speed loss may be subject to the impact of the distance between LPN and grand BS.Fig. 7 A and Fig. 7 B respectively illustrates and coordinates according to the Average Relative Speed loss of other embodiments more of the present invention and LPN user the schematic diagram that is biased.Distance between LPN and grand BS (is expressed as D _{m_r}) be different in the embodiment of Fig. 7 A and Fig. 7 B.Particularly, the distance used in the embodiment of composition graphs 7A is 150 meters, and the distance used in the embodiment of composition graphs 7B is 200 meters.

In step S302, obtain grand user and coordinate to be biased.

According to embodiments of the invention, grand user can be obtained in a number of ways and coordinate to be biased.

In certain embodiments, can pre-define or pre-set grand user to coordinate to be biased.Such as, grand user can be pre-set according to operator or those skilled in the art to coordinate to be biased; Predefined macro user can also be carried out according to the concrete communicator of heterogeneous network to coordinate to be biased.It should be noted that above-mentioned example is described for explanation, and grand user can be obtained in other modes in addition to the examples above and coordinate to be biased.

In some other embodiments, can determine that grand user coordinates to be biased by following: obtain third speed and the 4th speed, third speed is by having grand non-central area type and the UE performing Inter-Cell Interference Coordination realizes, and the 4th speed is by having grand non-central area type and the UE not performing Inter-Cell Interference Coordination realizes; And determine that grand user coordinates to be biased based on third speed and the 4th speed.According to embodiments of the invention, can determine that grand user coordinates to be biased based on third speed and the 4th speed as follows.First, Average Relative Speed loss can be calculated based on first rate and the second speed; Then, one or more saturation point can be determined relative to Average Relative Speed loss, wherein saturation point instruction consider the candidate that grand user coordinates to be biased, the sharply change of Average Relative Speed loss; Then, a candidate can be selected from multiple candidate to coordinate to be biased as grand user based on one or more saturation point.

According in embodiments of the invention, third speed instruction is by having grand non-central area type and the speed that realizes of the UE performing Inter-Cell Interference Coordination.In some embodiments of the invention, for the UE served by grand BS (also referred to as " grand UE "), particularly, there is grand non-central area type and perform the UE of Inter-Cell Interference Coordination, the third speed realized by this UE can be calculated as follows and (be expressed as )

$R_{IC}^{\mathrm{\α}}={\log }_2(1+\frac{P_m{\mathrm{\α}}_{i,m}^m\left|\right|{\left(h_{i,m}^m\right)}^H{w}_i^m|{|}^2}{{\mathrm{\σ}}^2+P_r{\mathrm{\α}}_{i,m}^r\left|\right|{\left(h_{i,m}^r\right)}^H{w}_{i,m}^r|{|}^2})---\left(4\right)$

Wherein represent the beam-shaper being used for i-th grand UE (that is, the UE served by grand BS);

represent the Beam-former of the interference coordination of i-th the grand UE being used for LPN;

P _mand P _rrepresent the transmitting power of grand BS and LPN respectively;

represent the extensive fading coefficients from LPN to i-th grand UE;

represent the extensive fading coefficients from grand BS to i-th grand UE;

represent the small-scale fading coefficients from LPN to i-th grand UE;

represent the small-scale fading coefficients from grand BS to i-th grand UE; And

σ ²represent the variance of zero-mean additive white Gaussian noise.

According to embodiments of the invention, the 4th speed instruction is by belonging to grand non-central area type and the speed that realizes of the UE not performing Inter-Cell Interference Coordination.According to embodiments of the invention, the 4th speed can be calculated by following formula

$R_{WIC}^{\mathrm{\θ}}={\log }_2(1+\frac{P_r{\mathrm{\α}}_{i,r}^r\left|\right|{\left(h_{i,r}^r\right)}^H{w}_i^r|{|}^2}{{\mathrm{\σ}}^2+P_m{\mathrm{\α}}_{i,r}^m})---\left(5\right)$

By using the third speed and the 4th speed that are such as calculated by equation (4) and (5), Average Relative Speed loss can be calculated as follows

According to embodiments of the invention, grand user can be calculated based on Average Relative Speed loss as follows and coordinate to be biased (being expressed as α):

Wherein α ₀it is the optimum value coordinating biased α acquisition according to equation (6) for grand user; And be defined as the grand cooperation relative gain factor, its instruction and the optimum value α being biased α for grand user collaboration ₀corresponding Average Relative Speed loss.

According to embodiments of the invention, can determine the one or more saturation points about Average Relative Speed loss, wherein the sharply change of the candidate that LPN user coordinates to be biased is considered in the loss of saturation point instruction Average Relative Speed; And then, a candidate can be selected from multiple candidate to coordinate to be biased as grand user based on one or more saturation point.

Respectively illustrate with reference to figure 8A and Fig. 8 B, Fig. 8 A and Fig. 8 B and coordinate according to the Average Relative Speed loss of some embodiments of the present invention and grand user the schematic diagram that is biased.

Fig. 8 A and Fig. 8 B shows along with grand user coordinates the different candidate of biased α and the Average Relative Speed loss changed.Usually, Average Relative Speed loss reduces along with the increase of α.But relative unity gain diminishes gradually, and observe bottom, wherein interference is avoided becoming not too important to system enhancement.This causes due to the following fact: along with α increases, the difference of increase that the user in coordinated regions will have between the RSRP from grand BS and RRH node, result in the reduction of interference coordination efficiency.The behavior instruction of this average relative loss expands collaboration region and can not bring very large gain.Some saturation points of the reasonable tradeoff that can be implemented between gain and cost may be there are.

Adopt different codebook size, i.e. 32 or 64 (as shown in Figure 6 A and 6 B) or adopt different distance (as shown in figures 7 a and 7b) that the different range of the value for Average Relative Speed loss can be produced between grand BS and LPN.But, the common observation that it should be noted that in these accompanying drawings be Mean Speed loss slope along with α change only among a small circle special sharply.This means, only in this range, interference coordination will bring very large gain and is very effective.Based on this observation, can determine that based on the point terminating this sharply scope of slope grand user coordinates biased and grand cooperation related gain factor ξ, so that realize the good compromise between unity gain and cost.In an embodiment of the present invention, such point is called as saturation point, and the sharply change of the candidate that grand user coordinates to be biased is considered in each instruction Average Relative Speed loss wherein.As shown in Figure 8 A, crosspoint S5 is saturation point.According to embodiments of the invention, can determine that grand user coordinates the value of biased α based on saturation point S5, the change the most sharply of the candidate that grand user coordinates to be biased is considered in this instruction Average Relative Speed loss.As shown in Figure 8 A, based target saturation point S5, can determine that grand user coordinates biased α is 28 (that is, α ₀, and the corresponding average relative proportion of goods damageds (that is, the grand cooperation relative gain factor=28) ) be 0.18.

According to embodiments of the invention, the factor that may affect the behavior of Average Relative Speed loss comprises the ability of such as interference coordination strategy, LPN position (supposing that the transmitting power of LPN and grand BS is fixing) etc.In certain embodiments, the behavior of Average Relative Speed loss may be subject to the impact of adopted codebook size.As shown in the figure, the codebook size used in the embodiment of composition graphs 8A is 32, and the codebook size used in the embodiment of composition graphs 8B is 64.As shown in Figure 8 B, there is saturation point S6, it can indicate the different range of the value for Average Relative Speed loss.

In some other embodiments, the behavior of Average Relative Speed loss may be subject to the impact of the distance between LPN and grand BS.Fig. 9 A and Fig. 9 B respectively illustrates and coordinates according to the Average Relative Speed loss of other embodiments more of the present invention and grand user the schematic diagram that is biased.Distance between LPN and grand BS (is expressed as D _{m_r}) be different in the embodiment of Fig. 9 A and Fig. 9 B.Particularly, the distance used in the embodiment of composition graphs 9A is 150 meters, and the distance used in the embodiment of composition graphs 9B is 200 meters.

In step S303, obtain the first signal strength signal intensity and the secondary signal intensity of each UE in multiple UE.

First signal strength signal intensity can indicate the intensity of the signal received from LPN at each UE place, and secondary signal intensity can indicate the intensity of the signal received from grand BS at each UE place.According to embodiments of the invention, the first signal strength signal intensity can be the Reference Signal Received Power (RSPR) from LPN, and/or secondary signal intensity can be the RSPR from grand BS.

According to embodiments of the invention, can coordinate to be biased (such as based on LPN user, obtain in step S301), grand user coordinates to be biased (such as, obtain in step S302), the first signal strength signal intensity and secondary signal intensity (such as, obtaining in step S303) determines the type of each UE.The determination of type can be realized in a number of ways.Such as, following steps S304-S307 is provided.It should be noted that step S304-S307 provides for explanation instead of restriction.

In step S304, if secondary signal intensity is more than or equal to the first signal strength signal intensity and LPN user coordinates biased sum, and secondary signal intensity is less than the first signal strength signal intensity and scope expands biased sum, then type is defined as the non-central area type of LPN.

According to embodiments of the invention, the first signal strength signal intensity, the intensity of the signal namely received from LPN at UE i place, is represented as RSRP _i ^r, and the intensity of secondary signal, the intensity of the signal namely received from grand BS at UE i place, is represented as RSRP _i ^m.If meet following condition, then this UE i can be confirmed as having the non-central area type of LPN:

RSRP _i ^r+θ≤RSRP _i ^m＜RSRP _i ^r+β (7)

Wherein θ represents that LPN user coordinates to be biased; And β represents that scope expansion is biased, and this can determine in a number of ways, wherein θ≤β.Such as, β can be redefined for predetermined value, such as, and 8dB.Again such as, predefined β can be carried out according to the existing solution do not illustrated here.

According to embodiments of the invention, LPN user coordinates the minimum value (θ of biased θ _min) can calculate according to large scale decline estimation as follows:

${\mathrm{\θ}}_{\min }=P_{dB}^m-(128.1+37.6*{\log }_{10}(R_m))-(P_{dB}^r-(140.7+36.7*{\log }_{10}\left(M_r\right)))---\left(8\right)$

Wherein M _rrepresent the minimum range such as in units of kilometer between LPN user and LPN; R _mrepresent the macrocell service radius such as in units of kilometer; with represent the transmitting power of LPN such as in units of dB and macro base station respectively.In certain embodiments, θ=0 represents equivalent RSRP point.

In step S305, if secondary signal intensity is less than the first signal strength signal intensity and LPN user coordinates biased sum, then type is defined as LPN central area type.

According to embodiments of the invention, if met the following conditions, then UE i can be confirmed as having LPN central area type:

RSRP _i ^m≤RSRP _i ^r+θ (9)

In step S306, if secondary signal intensity is more than or equal to the first signal strength signal intensity and scope expands biased sum, and secondary signal intensity is less than the first signal strength signal intensity and grand user coordinates biased sum, then type is defined as grand non-central area type.

According to embodiments of the invention, if met the following conditions, then UE i can be confirmed as having grand non-central area type:

RSRP _i ^r+β≤RSRP _i ^m＜RSRP _i ^r+α (10)

Wherein α indicates grand user to coordinate to be biased, and α > β.

In certain embodiments, can calculate according to this estimation that declines on a large scale the maximum (α that grand user coordinates the estimation of biased α as follows _max):

${\mathrm{\α}}_{mar}=P_{dB}^m-(128.1+37.6*{\log }_{10}(M_m))-(P_{dB}^r-(140.7+36.7*{\log }_{10}(D_{m\_r}+R_m)))---\left(11\right)$

Wherein M _mrepresent the minimum range between grand user and Hong BS such as in units of kilometer; And D _{m_r}represent the distance between LPN and grand BS such as in units of kilometer.

In step S307, if secondary signal intensity is greater than the first signal strength signal intensity and grand user coordinates biased sum, then type is defined as grand central area type.

According to embodiments of the invention, if met the following conditions, then UE i can be confirmed as having grand central area type:

RSRP _i ^r+α≤RSRP _i ^m(12)

With reference now to Fig. 4, Fig. 4, illustrate the flow chart for determining method 400 that user is right from UE according to still another embodiment of the invention.Method 400 can be considered to the embodiment of the step S202 of the method 200 described with reference to figure 2.In the following description of method 400, determine user couple based on codeword information, codeword information comprises the information of the information about preferred code word or the code word cluster about preferred code word and recommendation.But, it should be noted that this only for object principle of the present invention being described instead of limit its scope.

After method 400 starts, in step S401, determine whether the type of the UE in multiple UE belongs to the set of UE type, comprise the non-central area type of LPN and grand non-central area type.

According to embodiments of the invention, manner of execution 400 after the type obtaining the multiple UE in organization network.When knowing the type of multiple UE, in step S401, can determine whether a UE in multiple UE has the non-central domain type of LPN/grand non-central area type.In other words, can determine whether this UE has non-central area type (the non-central domain type of LPN or grand non-central domain type), and the UE type made it possible to according to determining obtains codeword information.

In step S402, belong to the set of UE type in response to the type determining UE, obtain about the information of the preferred code word of UE preference and about the information of code word cluster of recommending as codeword information.

If UE has non-central area type (the non-central area type of LPN or grand non-central area type), then codeword information can at least comprise about the information of the preferred code word of UE preference and the information about the code word cluster recommended.According to embodiments of the invention, the code word cluster of recommendation can indicate the code word cluster recommended to BS by UE.

In an embodiment of the present invention, the following code book by grand BS is expressed as B respectively ^mand the code book of LPN is expressed as B ^r

$B^m=\{B_1^m,...,B_M^m\}---\left(13\right)$

With

$B^r=\{B_1^r,...,B_N^r\},---\left(14\right)$

Wherein M and N represents the number of code word cluster; with be illustrated respectively in the code word cluster in grand BS and LPN code book. with represent the size of this code word cluster respectively.

According to embodiments of the invention, if UE has the non-central area type of LPN, then can calculate as follows and be expressed as preferred code word and be expressed as the code word set of recommendation

Group: $\begin{array}{c}{w}_{{\mathrm{PMI}}_{i,r}}=\underset{j=1,...,I^r}{\max }\left|\right|{\left(h_{i,r}^r\right)}^H{w}_j^r\left|\right|\\ w_{{\mathrm{REM}}_{i,r}}=\underset{j=1,...,I^m}{\max }\left|\right|{\left(h_{i,r}^m\right)}^H{w}_j^m\left|\right|\end{array}---\left(13\right)$

In some other embodiments, if UE has grand non-central area type, then can calculate the code word cluster of preferred code word and recommendation similarly.

Alternatively, channel quality can be obtained for scheduling process.According to embodiments of the invention, channel quality can comprise the information of the quality of reflection channel.Such as, channel quality can comprise Signal to Interference plus Noise Ratio (SINR), signal to noise ratio (SNR), signal interference ratio (SIR), carrier wave indicate (CQI) etc. with interference plus noise ratio (CINR), carrier-to-noise ratio (CNR), channel quality.

In certain embodiments, channel quality can be represented as SINR _{i, r}, and calculated (if UE has the non-central area type of LPN) by following formula:

${\mathrm{SINR}}_{i,r}=\underset{j\∈B_{R_i^r}^m}{\min }\frac{P_r{\mathrm{\α}}_{i,r}^r\left|\right|{\left(h_{i,r}^r\right)}^H{w}_{{\mathrm{PMI}}_{i,r}}^r|{|}^2}{{\mathrm{\σ}}^2+P_m{\mathrm{\α}}_{i,r}^m\left|\right|{\left(h_{i,r}^m\right)}^H{w}_j^m|{|}^2}---\left(14\right)$

Wherein represent code word cluster index, namely the UE comprising the non-central region of LPN recommends code word.

In some other embodiments, if UE has grand non-central area type, then can calculate channel quality similarly.

In step S403, do not belong to the set of UE type in response to the type determining UE, the information about the preferred code word of UE institute preference of obtaining is as codeword information.

If the type determining UE does not belong to the set of UE type, in other words, if UE has central area type (LPN central area type or grand central area type), then codeword information can comprise the information of the preferred code word about UE institute preference.According to embodiments of the invention, if UE has LPN central area type, preferred code word can be calculated by following formula and (be expressed as )

$w_{{\mathrm{PMI}}_{i,r}}=\underset{j=1,...,I^r}{\max }\left|\right|{\left(h_{i,r}^r\right)}^H{w}_j^r\left|\right|---\left(15\right)$

In some other embodiments, if UE has grand central area type, then can calculate preferred code word similarly.

According to embodiments of the invention, alternatively, channel quality can be obtained for scheduling process.Such as, channel quality can be represented as SINR _{i, r}, and calculate (if UE has LPN central area type) by following formula:

${\mathrm{SINR}}_{i,r}=\frac{P_r{\mathrm{\α}}_{i,r}^r\left|\right|{\left(h_{i,r}^r\right)}^H{w}_{{\mathrm{PMI}}_{i,r}}^r|{|}^2}{{\mathrm{\σ}}^2+P_m{\mathrm{\α}}_{i,r}^m}---\left(16\right)$

In some other embodiments, if UE has grand central area type, then can calculate channel quality similarly.

In step S404, determine one or more user couple based on codeword information.

According to embodiments of the invention, user couple can be determined based on codeword information in many ways.In certain embodiments, the UE of LPN central area type and the UE of grand central area type can be confirmed as user couple.

In some other embodiments, if the preferred code word of the UE of LPN central area type belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of LPN central area type and the UE of grand non-central area type can be confirmed as user couple.

In some other embodiments, if the preferred code word of the UE of grand central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, then the UE of the non-central area type of LPN and the UE of grand central area type can be confirmed as user couple.

In some other embodiments, if the preferred code word of the UE of grand non-central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, and the preferred code word of the UE of the non-central area type of LPN belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of the non-central area type of LPN and the UE of non-macro central area type can be confirmed as user couple.

It should be noted that the object for spirit of the present invention and principle are described, exemplarily describe specific embodiments more of the present invention above.The present invention is described for example instead of restriction.It will be understood by those skilled in the art that and can change when not deviating from scope of the present invention or revise embodiments of the invention.

According to embodiments of the invention, based on (such as, as determined in step s 404) user couple, the multiple UE in HetNet can be dispatched.Scheduling can perform with various ways as known in the art.Such as, dispatched users pair can be carried out based on equitable proportion (PF) scheduler.In like fashion, effectively presence of intercell interference can be reduced.

With reference now to Fig. 5, Fig. 5, illustrate according to an embodiment of the invention for the block diagram of the device 500 of the interference coordination in heterogeneous network.As shown, device 500 comprises: getter 510, be configured to the type of the multiple UE obtained in heterogeneous network, wherein this heterogeneous network comprises at least one grand BS and at least one LPN, and each class wherein in the type is grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN; And determiner 520, being configured to determine one or more user couple based on obtained type from multiple UE, making based on one or more user dispatching multiple UE to reduce presence of intercell interference.

According to embodiments of the invention, getter 510 can comprise: the first acquiring unit, is configured to obtain LPN user and coordinates to be biased; Second acquisition unit, is configured to obtain grand user and coordinates to be biased; 3rd acquiring unit, be configured to the first signal strength signal intensity and the secondary signal intensity of each UE obtained in multiple UE, wherein the first signal strength signal intensity indicates the intensity of the signal received from LPN at each UE place, and secondary signal intensity indicates the intensity of the signal received from grand BS at each UE place; And first determining unit, be configured to coordinate to be biased based on LPN user, grand user coordinates to be biased, type that the first signal strength signal intensity and secondary signal intensity determine each UE.

According to embodiments of the invention, first acquiring unit of getter 510 can comprise: the 4th acquiring unit, be configured to obtain first rate and the second speed, this first rate is by belonging to the non-central area type of LPN and performing the UE realization of Inter-Cell Interference Coordination, and the second speed is by belonging to the non-central area type of LPN and not performing the UE realization of Inter-Cell Interference Coordination; And second determining unit, be configured to determine that LPN user coordinates to be biased based on first rate and the second speed.

According to embodiments of the invention, the second determining unit can comprise: the first computing unit, is configured to calculate Average Relative Speed loss based on first rate and the second speed; First saturation point determining unit, is configured to determine one or more saturation point about this Average Relative Speed loss, wherein saturation point instruction consider the candidate that LPN user coordinates to be biased, the sharply change of Average Relative Speed loss; And first selected cell, be configured to from candidate, select a candidate to coordinate to be biased as LPN user based on one or more saturation point.

According to embodiments of the invention, second acquisition unit can comprise: the 5th acquiring unit, obtain third speed and the 4th speed, this third speed is by belonging to grand non-central area type and performing the UE realization of Inter-Cell Interference Coordination, and the 4th speed is by belonging to grand non-central area type and not performing the UE realization of Inter-Cell Interference Coordination; And the 4th determining unit, be configured to determine that grand user coordinates to be biased based on third speed and the 4th speed.

According to embodiments of the invention, the 4th determining unit can comprise: the second computing unit, is configured to calculate Average Relative Speed loss based on first rate and the second speed; Second saturation point determining unit, is configured to determine one or more saturation point about this Average Relative Speed loss, wherein saturation point instruction consider the candidate that grand user coordinates to be biased, the sharply change of Average Relative Speed loss; And second selected cell, be configured to from candidate, select a candidate to coordinate to be biased as grand user based on one or more saturation point.

According to embodiments of the invention, first determining unit can be configured to further: if secondary signal intensity is more than or equal to the first signal strength signal intensity and LPN user coordinates biased sum, and secondary signal intensity is less than the first signal strength signal intensity and scope expands biased sum, then determine that type is the non-central domain type of LPN; If secondary signal intensity is less than the first signal strength signal intensity and LPN user coordinates biased sum, then determine that type is LPN central area type; If secondary signal intensity is more than or equal to the first signal strength signal intensity and scope expands biased sum, and secondary signal intensity is less than the first signal strength signal intensity and grand user coordinates biased sum, then determine that type is grand non-central area type; And if secondary signal intensity is greater than the first signal strength signal intensity and grand user coordinates biased sum, then determine that type is grand central area type.

According to embodiments of the invention, first determining unit can comprise: first kind determining unit, if be configured to secondary signal intensity to be more than or equal to the first signal strength signal intensity and LPN user coordinates biased sum, and secondary signal intensity is less than the first signal strength signal intensity and the biased sum of scope expansion, then determine that type is the non-central domain type of LPN; Second Type determining unit, if be configured to secondary signal intensity to be less than the first signal strength signal intensity and LPN user coordinates biased sum, then determines that type is LPN central area type; 3rd type determining units, if be configured to secondary signal intensity to be more than or equal to the first signal strength signal intensity and the biased sum of scope expansion, and secondary signal intensity is less than the first signal strength signal intensity and grand user coordinates biased sum, then determine that type is grand non-central area type; And the 4th type determining units, if be configured to secondary signal intensity to be greater than the first signal strength signal intensity and grand user coordinates biased sum, then determine that type is grand central area type.

According to embodiments of the invention, about each UE in multiple UE, the first signal strength signal intensity is the RSPR from LPN, and/or secondary signal intensity is the RSPR from grand BS.

According to embodiments of the invention, getter 510 can comprise: the first receiving element, is configured to receive about the information of the type of UE from UE; And/or second receiving element, be configured to receive information about the type of UE from grand BS or LPN of service UE.

According to embodiments of the invention, determiner 520 can comprise: the 6th acquiring unit, is configured to obtain based on the type of multiple UE the codeword information be associated with each UE in multiple UE; And the 5th determining unit, be configured to determine one or more user couple based on codeword information.

According to embodiments of the invention, the 6th acquiring unit can comprise: the 6th determining unit, and whether the type being configured to the UE determined in multiple UE belongs to the set of UE type, and wherein the set of UE type comprises the non-central area type of LPN and grand non-central area type; 7th acquiring unit, is configured to belong to the set of UE type in response to the type determining UE, obtains about the information of the preferred code word of UE institute preference and the information about the code word cluster recommended; And the 8th acquiring unit, be configured to not belong to the set of UE type in response to the type determining UE, obtain the information of the preferred code word about UE institute preference.

According to embodiments of the invention, the 5th determining unit can be configured to further: the UE of the UE of LPN central area type and grand central area type is defined as user couple; If the preferred code word of the UE of LPN central area type belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of the UE of LPN central area type and grand non-central area type is defined as user couple; If the preferred code word of the UE of grand central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, then the UE of the UE of non-central for LPN area type and grand central area type is defined as user couple; And if the preferred code word of the UE of grand non-central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, and the preferred code word of the UE of the non-central area type of LPN belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of the UE of non-central for LPN area type and non-macro central area type is defined as user couple.

According to embodiments of the invention, the 5th determining unit can comprise: first user, to determining unit, is configured to the UE of the UE of LPN central area type and grand central area type to be defined as user couple; Second user is to determining unit, if the preferred code word being configured to the UE of LPN central area type belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of the UE of LPN central area type and grand non-central area type is defined as user couple; 3rd user is to determining unit, if the preferred code word being configured to the UE of grand central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, then the UE of the UE of non-central for LPN area type and grand central area type is defined as user couple; And the 4th user to determining unit, if the preferred code word being configured to the UE of grand non-central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of LPN, and the preferred code word of the UE of the non-central area type of LPN belongs to the code word cluster of the recommendation of the UE of grand non-central area type, then the UE of the UE of non-central for LPN area type and non-macro central area type is defined as user couple.

It should be noted that device 500 can realize by figure in grand BS, LPN, controller, central location, server, UE or other any applicable equipment, and device 500 can be applied at some heterogeneous networks, such as LTE network.Shall also be noted that getter 510 and determiner 520 can be realized by any suitable technology that is known or following exploitation now.In addition, the individual equipment shown in Fig. 5 can realize alternatively separately in multiple equipment, and multiple independent equipment can realize in one single.Scope of the present invention is not limited to these aspects.

It should be noted that in some embodiments of the invention, device 500 can be configured to the function realizing describing with reference to figure 2-4.Therefore, the feature discussed about any one in method 200 to 400 goes for the corresponding assembly of device 500.Shall also be noted that the assembly of device 500 can realize with hardware, software, firmware and/or its combination.Such as, the assembly of device 500 can correspondingly be realized by circuit, processor or any other suitable selection equipment.It will be understood by those skilled in the art that above-described embodiment is only illustrative rather than definitive thereof.

In embodiments more of the present disclosure, device 500 comprises at least one processor.At least one processor being applicable to embodiments of the invention use can comprise, such as, and general and both application specific processors of known or following exploitation.This device 500 also comprises at least one memory.At least one memory can comprise, such as, as semiconductor memory devices and the flash memory device of RAM, ROM, EPROM, EEPROM.This at least one memory may be used for the program storing computer executable instructions.This program can be write with any senior and/or lower level assembler or explainable programming language.According to embodiment, computer executable instructions can be configured to, and by least one processor, device 500 is at least performed according to any one in said method 200,300 and 400.

In embodiments more of the present disclosure, device 500 comprises at least one processor.Be applicable at least one processor that embodiments of the invention use can comprise, such as, general and both application specific processors of known or following exploitation.This device 500 comprises at least one memory further.This at least one memory can comprise, such as, as semiconductor memory devices and the flash memory device of RAM, ROM, EPROM, EEPROM.This at least one memory may be used for the program storing computer executable instructions.This program can be write with any senior and/or lower level assembler or explainable programming language.According to embodiment, computer executable instructions can be configured to, and by least one processor, device 500 is at least performed according to any one in said method 200,300 and 400.

Based on above description, it will be understood by those skilled in the art that the disclosure can realize with device, method or computer program.Usually, various exemplary embodiment can realize with hardware or special circuit, software, its any combination of logic OR.Such as, some aspects can with hardware implementing, and other aspects can realize with the firmware that can be performed by controller, microcontroller or other computing equipments or software, but the disclosure is not limited thereto.Although the various aspects of illustrative embodiments of the present disclosure can be illustrated and be described as block diagram, flow chart or use some other diagrammatic representations, but be well understood that, as non-limiting example, these frames described herein, device, system, technology or method can realize with hardware, software, firmware, special circuit or logic, common hardware or controller or other computing equipments or its some combinations.

Various pieces shown in Fig. 2 to Fig. 4 operations that can be regarded as method step and/or obtain from the operation of computer program code and/or be configured to the logic circuit component of the multiple couplings performing correlation function.At least some aspect of exemplary embodiment of the present disclosure can realize with the various assemblies of such as integrated circuit (IC) chip and module, and exemplary embodiment of the present disclosure can be implemented in the device being implemented as integrated circuit, FPGA or ASIC, and it can be configured to and operates according to exemplary embodiment of the present disclosure.

Although this specification comprise many specifically realize details, these should not be interpreted as the restriction to any scope of disclosure that can be claimed, but as can specific to the description of the feature of concrete disclosed specific embodiment.The special characteristic described in the context of independent embodiment in this manual can also with in single embodiment to combine realization.On the contrary, the various feature described in the context of single embodiment can also realize individually in many embodiment: or with any suitable sub-portfolio.In addition; even initially so claimed although more than feature be described to work with particular combination; but the one or more features in claimed combination can be removed in some cases from this combination, and claimed combination can for the variant of sub-portfolio or sub-portfolio.

Similarly, although depict operation with concrete order in the accompanying drawings, this is not appreciated that needs with shown concrete order or performs such operation with consecutive order, or needs to perform all illustrated operations to realize the result expected.In some cases, multitask and parallel processing may be favourable.In addition, the separation of the various system components in above-described embodiment is not appreciated that and all needs such separation in all embodiments, and should be appreciated that described program assembly and system usually can be integrated integrated or be encapsulated in multiple software product in single software product.

According to foregoing teachings, when reading by reference to the accompanying drawings, to the various amendments of foregoing example embodiment of the present disclosure, change apparent to those skilled in the art.Any of the present disclosure non-limiting with in the scope of exemplary embodiment by still falling into all modifications.In addition, the technical staff in the field that these embodiments of the present disclosure benefiting from the instruction previously described and present in associated drawings belong to will recognize other embodiments of the present disclosure set forth here.

Therefore, should be appreciated that embodiment of the present disclosure is not limited to disclosed specific embodiment, and amendment and other embodiments are intended to be included within the scope of the appended claims.Although use particular term here, it is used in a generic and descriptive sense and is not used in the object of restriction.

Claims (24)

1., for a method for the interference coordination in heterogeneous network, comprising:

Obtain the type of the multiple subscriber equipmenies (UE) in described heterogeneous network, wherein said heterogeneous network comprises at least one macro base station (BS) and at least one low power nodes (LPN), and each type in wherein said type is grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN; And

Based on obtain described type from described multiple UE, determine one or more user couple, make described multiple UE based on described one or more user to and be scheduled to reduce presence of intercell interference.

2. method according to claim 1, the type wherein obtaining the multiple UE in described heterogeneous network comprises:

Obtain LPN user to coordinate to be biased;

Obtain grand user to coordinate to be biased;

Obtain the first signal strength signal intensity and the secondary signal intensity of each UE in described multiple UE, wherein said first signal strength signal intensity indicates the intensity of the signal received from described LPN at described each UE place, and described secondary signal intensity indicates the intensity of the signal received from described grand BS at described each UE place; And

Coordinate to be biased based on described LPN user, described grand user coordinate to be biased, type that described first signal strength signal intensity and described secondary signal intensity determine described each UE.

3. method according to claim 2, wherein obtains LPN user and coordinates biased comprising:

Obtain first rate and the second speed, described first rate is by belonging to the non-central area type of described LPN and performing the UE realization of Inter-Cell Interference Coordination, and described second speed is by belonging to the non-central area type of described LPN and not performing the UE realization of Inter-Cell Interference Coordination; And

Determine that described LPN user coordinates to be biased based on described first rate and described second speed.

4. method according to claim 3, wherein determine that described LPN user coordinates biased comprising based on described first rate and described second speed:

Average Relative Speed loss is calculated based on described first rate and described second speed;

Determine one or more saturation point about described Average Relative Speed loss, wherein saturation point instruction consider the candidate that described LPN user coordinates to be biased, the sharply change of described Average Relative Speed loss; And

From described candidate, a candidate is selected to coordinate to be biased as described LPN user based on described one or more saturation point.

5. method according to claim 2, wherein obtains grand user and coordinates biased comprising:

Obtain third speed and the 4th speed, described third speed is by belonging to described grand non-central area type and performing the UE realization of Inter-Cell Interference Coordination, and described 4th speed is by belonging to described grand non-central area type and not performing the UE realization of Inter-Cell Interference Coordination; And

Determine that described grand user coordinates to be biased based on described third speed and described 4th speed.

6. method according to claim 5, wherein determine that described grand user coordinates biased comprising based on described third speed and described 4th speed:

Average Relative Speed loss is calculated based on described first rate and described second speed;

Determine one or more saturation point about described Average Relative Speed loss, wherein saturation point instruction considers that described grand user coordinates the sharply change of the candidate be biased, described Average Relative Speed loss; And

From described candidate, a candidate is selected to coordinate to be biased as described grand user based on described one or more saturation point.

7. method according to claim 2, wherein coordinate to be biased based on described LPN user, described grand user coordinates to be biased, described first signal strength signal intensity and described secondary signal intensity determines that the type of described each UE comprises:

If described secondary signal intensity is more than or equal to described first signal strength signal intensity and described LPN user coordinates biased sum, and described secondary signal intensity is less than described first signal strength signal intensity and scope expands biased sum, then determine that described type is the non-central area type of described LPN;

If described secondary signal intensity is less than described first signal strength signal intensity and described LPN user coordinates biased sum, then determine that described type is described LPN central area type;

If described secondary signal intensity is more than or equal to described first signal strength signal intensity and described scope expands biased sum, and described secondary signal intensity is less than described first signal strength signal intensity and described grand user coordinates biased sum, then determine that described type is described grand non-central area type; And

If described secondary signal intensity is greater than described first signal strength signal intensity and described grand user coordinates biased sum, then determine that described type is described grand central area type.

8. method according to claim 2, wherein about each UE in described multiple UE, described first signal strength signal intensity is the Reference Signal Received Power (RSPR) from described LPN, and/or described secondary signal intensity is the RSPR from described grand BS.

9. method according to claim 1, the type wherein obtaining each UE in the UE in described heterogeneous network comprises:

The information about the type of described UE is received from UE; And/or

The information about the type of described UE is received from grand BS or LPN served UE.

10. method according to claim 1, wherein from described multiple UE, determine that one or more user is to comprising based on the described type obtained:

Type based on described multiple UE obtains the codeword information be associated with each UE in described multiple UE; And

Described one or more user couple is determined based on described codeword information.

11. methods according to claim 10, wherein obtain based on the type of described multiple UE the codeword information be associated with each UE in described multiple UE and comprise:

Determine whether the type of the UE in described multiple UE belongs to the set of UE type, the set of wherein said UE type comprises the non-central area type of described LPN and described grand non-central area type;

In response to determining that the type of described UE belongs to the set of described UE type, obtain about the information of the preferred code word of described UE institute preference and the information about the code word cluster recommended; And

In response to determining that the type of described UE does not belong to the set of described UE type, obtain the information of the preferred code word about described UE institute preference.

12. methods according to claim 11, wherein determine that described one or more user is to comprising based on described codeword information:

The UE of the UE of described LPN central area type and described grand central area type is defined as user couple;

If the preferred code word of the UE of described LPN central area type belongs to the code word cluster of the recommendation of the UE of described grand non-central area type, then the UE of the UE of described LPN central area type and described grand non-central area type is defined as user couple;

If the preferred code word of the UE of described grand central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of described LPN, then the UE of the UE of non-central for described LPN area type and described grand central area type is defined as user couple; And

If the preferred code word of the UE of described grand non-central area type belongs to the code word cluster of the recommendation of the UE of the non-central area type of described LPN, and the preferred code word of the UE of the non-central area type of described LPN belongs to the code word cluster of the recommendation of the UE of described grand non-central area type, then the UE of the UE of non-central for described LPN area type and described non-macro central area type is defined as user couple.

13. 1 kinds, for the device of the interference coordination in heterogeneous network, comprising:

Getter, described getter is configured to the type of the multiple subscriber equipmenies (UE) obtained in described heterogeneous network, wherein said heterogeneous network comprises at least one macro base station (BS) and at least one low power nodes (LPN), and each in wherein said type is grand central area type, grand non-central area type, LPN central area type or the non-central area type of LPN; And

Determiner, described determiner be configured to based on obtain described type from described multiple UE, determine one or more user couple, make described multiple UE based on described one or more user to and be scheduled to reduce presence of intercell interference.

14. devices according to claim 13, wherein said getter comprises:

First acquiring unit, described first acquiring unit is configured to obtain LPN user to be coordinated to be biased;

Second acquisition unit, described second acquisition unit is configured to obtain grand user to be coordinated to be biased;

3rd acquiring unit, described 3rd acquiring unit is configured to the first signal strength signal intensity and the secondary signal intensity of each UE obtained in described multiple UE, wherein said first signal strength signal intensity indicates the intensity of the signal received from described LPN at described each UE place, and described secondary signal intensity indicates the intensity of the signal received from described grand BS at described each UE place; And

First determining unit, the type that described first determining unit is configured to coordinate to be biased based on described LPN user, described grand user coordinates to be biased, described first signal strength signal intensity and described secondary signal intensity determine described each UE.

15. devices according to claim 14, wherein said first acquiring unit comprises:

4th acquiring unit, described 4th acquiring unit is configured to obtain first rate and the second speed, described first rate is by belonging to the non-central area type of described LPN and performing the UE realization of Inter-Cell Interference Coordination, and described second speed is by belonging to the non-central area type of described LPN and not performing the UE realization of Inter-Cell Interference Coordination; And

Second determining unit, described second determining unit is configured to determine that described LPN user coordinates to be biased based on described first rate and described second speed.

16. devices according to claim 15, wherein said second determining unit comprises:

First computing unit, described first computing unit is configured to calculate Average Relative Speed loss based on described first rate and described second speed;

First saturation point determining unit, described first saturation point determining unit is configured to about described Average Relative Speed loss to determine one or more saturation point, wherein saturation point instruction consider the candidate that described LPN user coordinates to be biased, the sharply change of described Average Relative Speed loss; And

First selected cell, described first selected cell is configured to from described candidate, select a candidate to coordinate to be biased as described LPN user based on described one or more saturation point.

17. devices according to claim 14, wherein said second acquisition unit comprises:

5th acquiring unit, described 5th acquiring unit is configured to obtain third speed and the 4th speed, described third speed is by belonging to described grand non-central area type and performing the UE realization of Inter-Cell Interference Coordination, and described 4th speed is by belonging to described grand non-central area type and not performing the UE realization of Inter-Cell Interference Coordination; And

4th determining unit, described 4th determining unit is configured to determine that described grand user coordinates to be biased based on described third speed and described 4th speed.

18. devices according to claim 17, wherein said 4th determining unit comprises:

Second computing unit, described second computing unit is configured to calculate Average Relative Speed loss based on described first rate and described second speed;

Second saturation point determining unit, described second saturation point determining unit is configured to about described Average Relative Speed loss to determine one or more saturation point, and wherein saturation point instruction considers that described grand user coordinates the sharply change of the candidate be biased, described Average Relative Speed loss; And

Second selected cell, described second selected cell is configured to from described candidate, select a candidate to coordinate to be biased as described grand user based on described one or more saturation point.

19. devices according to claim 14, wherein said first determining unit comprises:

First kind determining unit, if described first kind determining unit is configured to described secondary signal intensity and is more than or equal to described first signal strength signal intensity and described LPN user coordinates biased sum, and described secondary signal intensity is less than described first signal strength signal intensity and scope expands biased sum, then determine that described type is the non-central area type of described LPN;

Second Type determining unit, if described Second Type determining unit is configured to described secondary signal intensity be less than described first signal strength signal intensity and described LPN user coordinates biased sum, then determines that described type is described LPN central area type;

3rd type determining units, if described 3rd type determining units is configured to described secondary signal intensity and is more than or equal to described first signal strength signal intensity and scope and expands biased sum, and described secondary signal intensity is less than described first signal strength signal intensity and described grand user coordinates biased sum, then determine that described type is described grand non-central area type; And

4th type determining units, if described 4th type determining units is configured to described secondary signal intensity be greater than described first signal strength signal intensity and described grand user coordinates biased sum, then determines that described type is described grand central area type.

20. devices according to claim 14, wherein about each UE in described multiple UE, described first signal strength signal intensity is the Reference Signal Received Power (RSPR) from described LPN, and/or described secondary signal intensity is the RSPR from described grand BS.

21. devices according to claim 13, wherein said getter comprises:

First receiving element, described first receiving element is configured to receive about the information of the type of described UE from UE; And/or

Second receiving element, described second receiving element is configured to receive information about the type of described UE from grand BS or LPN served UE.

22. devices according to claim 13, wherein said determiner comprises:

6th acquiring unit, described 6th acquiring unit is configured to obtain based on the type of described multiple UE the codeword information be associated with each UE in described multiple UE; And

5th determining unit, described 5th determining unit is configured to determine described one or more user couple based on described codeword information.

23. devices according to claim 22, wherein said 6th acquiring unit comprises:

6th determining unit, whether the type that described 6th determining unit is configured to the UE determined in described multiple UE belongs to the set of UE type, and the set of wherein said UE type comprises the non-central area type of described LPN and described grand non-central area type;

7th acquiring unit, described 7th acquiring unit is configured in response to determining that the type of described UE belongs to the set of described UE type, obtains about the information of the preferred code word of described UE institute preference and the information about the code word cluster recommended; And

8th acquiring unit, described 8th acquiring unit is configured to, and in response to determining that the type of described UE does not belong to the set of described UE type, obtains the information of the preferred code word about described UE institute preference.

24. devices according to claim 23, wherein said 5th determining unit comprises:

First user is to determining unit, and described first user is configured to the UE of the UE of described LPN central area type and described grand central area type to be defined as user couple to determining unit;

Second user is to determining unit, if described second user is configured to the UE of described LPN central area type preferred code word to determining unit belongs to the code word cluster of the recommendation of the UE of described grand non-central area type, then the UE of the UE of described LPN central area type and described grand non-central area type is defined as user couple;

3rd user is to determining unit, if described 3rd user is configured to the UE of described grand central area type preferred code word to determining unit belongs to the code word cluster of the recommendation of the UE of the non-central area type of described LPN, then the UE of the UE of non-central for described LPN area type and described grand central area type is defined as user couple; And

4th user is to determining unit, if described 4th user is configured to the UE of described grand non-central area type preferred code word to determining unit belongs to the code word cluster of the recommendation of the UE of the non-central area type of described LPN, and the preferred code word of the UE of the non-central area type of described LPN belongs to the code word cluster of the recommendation of the UE of described grand non-central area type, then the UE of the UE of non-central for described LPN area type and described non-macro central area type is defined as user couple.