CN103338519A - CoMP collaborative cluster, CoMP user partition method and spectrum resource allocation method - Google Patents

Abstract

The invention discloses a CoMP collaborative cluster, a CoMP user partition method and a spectrum resource allocation method, which are designed for improving the communication capacity and the communication quality of a communication system. The CoMP collaborative cluster is arranged in three adjacent communities; each community is divided into three equal sectors by taking a base station as the center, and comprises a first collaborative cluster and a second collaborative cluster; the first collaborative cluster comprises three adjacent sectors in different communities; the base stations in the three sectors of the first collaborative cluster send signals to a CoMP user of the first collaborative cluster simultaneously; the second collaborative cluster comprises two adjacent sectors in different communities; the base stations in the two sectors of the second collaborative cluster send signals to a CoMP user of the second collaborative cluster simultaneously. According to the invention, a non-CoMP user can obtain fixed spectrum resource allocation, and the optimal spectrum allocation method is selected according to a channel, which effectively improves user throughput capability, and optimizes resource utilization rate.

Description

CoMP cooperative cluster, CoMP user's division methods and frequency spectrum resource allocation method

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of CoMP cooperative cluster and CoMP user's division methods and resource allocation methods.

Background technology

Collaborative multicast communication technology CoMP(Coordinate Multiple Point) is one of crucial Enhanced Technology of LTE-Advanced, can optimizes the overall system performance of a plurality of residential quarters at a plurality of minizones shared channel information and data message.

As shown in Figure 1, described CoMP cooperative cluster is made of three sectors from three adjacent residential quarters; The sector that constitutes described cooperative cluster comprises sector 1, sector 2 and sector 3; Be respectively equipped with base station 1, base station 2 and base station 3 in described adjacent three residential quarters.Be CoMP user under this CoMP cooperative cluster as user 1, then its when communicating, base station 1 transmits in the sector 1, simultaneously base station 2 transmit in the sector 2 and simultaneously base station 3 in sector 3, transmit.The signal gain height that receives of user 1 like this, signal quality is good.

Obvious this division methods, the user in the residential quarter only exists CoMP user or non-CoMP user under the cooperative cluster that three sectors constitute, and obviously is unfavorable for the throughput of communicating by letter, the optimum allotment of resource.

Summary of the invention

(1) goal of the invention

At the problems referred to above, the present invention aim to provide under a kind of situation that improves the edge customer throughput, optimize the average throughput of residential quarter as much as possible, improve CoMP cooperative cluster, CoMP user's division methods and the frequency spectrum resource allocation method of the fairness of scheduling of resource.

(2) technical scheme

For reaching above-mentioned purpose, CoMP cooperative cluster of the present invention is arranged in three adjacent residential quarters; Each described residential quarter is divided into three sectors centered by the base station, comprise first cooperative cluster and second cooperative cluster;

Described first cooperative cluster is made of the three adjacent sectors that are positioned at different described residential quarters; The base station in constituting three sectors of first cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal;

Described second cooperative cluster constitutes by being arranged in different districts two adjacent sectors; The base station in constituting two sectors of second cooperative cluster simultaneously the CoMP user to described second cooperative cluster send signal.

Preferably, described residential quarter is hexagonal cell; Described base station is provided with respectively the smart antenna matrix towards three sectors.

For reaching above-mentioned purpose, CoMP user's division methods of the present invention may further comprise the steps:

Step S1: the user calculates its signal to noise ratio SINR under non-CoMP communication pattern respectively according to the signal that receives _No-CoMPAnd the signal to noise ratio SINR under the CoMP of first cooperative cluster communication pattern _Three-CoMP

Step S2: the user judges SINR _Three-CoMPWhether be not less than three times of SINR _No-CoMP,

If then it is the first cooperative cluster CoMP user, during communication the base station in constituting three sectors of first cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal,

Then enter step S3 if not;

Step S3: the user calculates the signal to noise ratio SINR under the CoMP of second cooperative cluster communication pattern _Two-CoMP

Step S4: the user judges SINR _Two-CoMPWhether be not less than twice SINR _No-CoMP,

If then this user is the second cooperative cluster CoMP user, during communication the base station in constituting two sectors of second cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal,

Then this user is non-CoMP user if not, and the base station sends signal to its sector, place during communication;

Wherein, described first cooperative cluster constitutes by being arranged in different districts three adjacent sectors;

Described second cooperative cluster constitutes by being arranged in different districts two adjacent sectors.

Further, also comprise step S5:

The user will divide the result and return the base station.

For reaching above-mentioned purpose, frequency spectrum resource allocation method of the present invention is used for aforesaid CoMP cooperative cluster, and the frequency spectrum resource in each residential quarter is assigned as first frequency spectrum resource, second frequency spectrum resource and the 3rd frequency spectrum resource;

Described first frequency spectrum resource is used for the first cooperative cluster CoMP telex network;

Described second frequency spectrum resource is used for the second cooperative cluster CoMP telex network;

Described first frequency spectrum resource is used for non-CoMP telex network.

Preferably, specifically may further comprise the steps:

Step 1: the base station is calculated the dispatching priority factor p of CoMP user on each frequency band respectively _c, the CoMP user in first sector dispatching priority factor p ₁, the CoMP user in second sector dispatching priority factor p ₂And the 3rd dispatching priority factor p of CoMP user in the sector ₃

Step 2: the base station judges between the dispatching priority factor of identical frequency band whether have 3p _c〉=p ₁+ p ₂+ p ₃,

If existing then, this frequency band is first frequency spectrum resource;

Carry out step 3 if do not exist then:

Step 3: the base station judges between the dispatching priority factor of identical frequency band whether have 2p _c〉=p ₁+ p ₂Or 2p _c〉=p ₁+ p ₃Or 2p _c〉=p ₂+ p ₃,

If existing then, this frequency band is second frequency spectrum resource;

This frequency band is the 3rd frequency spectrum resource if do not exist then;

Wherein said CoMP user comprises the first cooperative cluster CoMP user and the second cooperative cluster CoMP user.

Preferably, adopt equitable proportion to calculate p _c, p ₁, p ₂And p ₃

Preferably, described frequency spectrum resource allocation method is periodic dynamic frequency spectrum deployment method.

(3) beneficial effect of the present invention

CoMP cooperative cluster of the present invention, CoMP user's division methods and resource allocation methods.First cooperative cluster that in the CoMP cooperative cluster, superposeed and second cooperative cluster, thereby further reduced the interference of the minizone of edge customer, and only two sectors are that the second cooperative cluster CoMP user sends signal simultaneously, have then further improved the throughput of edge customer; And by resource allocation methods when improving the throughput of edge customer, guaranteed frequency spectrum resource scheduling fairness and optimization.

Description of drawings

Fig. 1 is the structural representation of existing C oMP cooperative cluster;

Fig. 2 is the structural representation of the embodiment of the invention one described CoMP cooperative cluster;

Fig. 3 is the flow chart of the embodiment of the invention two described CoMP user's division methods;

Fig. 4 is that the embodiment of the invention three is described

Fig. 5 be CoMP cooperative cluster of the present invention under the spectrum allocation may of frequency spectrum resource allocation method of the present invention message capacity and traditional CoMP cooperative cluster at the comparison diagram of the following message capacity of polling dispatching method;

Fig. 6 is that CoMP cooperative cluster of the present invention is at the comparison diagram of message capacity, the traditional C oMP cooperative cluster message capacity under the frequency spectrum polling dispatching method in frequency spectrum fixed allocation method and traditional C oMP cooperative cluster under the spectrum allocation may of frequency spectrum resource allocation method of the present invention.

Embodiment

The present invention is described further below in conjunction with Figure of description and embodiment.

Embodiment one:

As shown in Figure 2, present embodiment CoMP cooperative cluster is arranged in three adjacent residential quarters residential quarter 11, residential quarter 12 and residential quarter 13; Each described residential quarter is divided into three sectors centered by the base station, comprise first cooperative cluster 21 and second cooperative cluster 22; Wherein, fill with solid line three of first cooperative cluster 21 sectors in the formation, and two sector with dashed lines lines that constitute second cooperative cluster 22 are filled; Can also be used for making up second cooperative cluster 22 for the sector that constitutes first cooperative cluster 21 as can be known by diagram, first cooperative cluster and second cooperative cluster also can be to adopt diverse sector to constitute in the specific implementation;

Described first cooperative cluster 21 is made of the three adjacent sectors that are positioned at different described residential quarters; The base station in constituting three sectors of first cooperative cluster 21 simultaneously the CoMP user to described first cooperative cluster 21 send signal;

Described second cooperative cluster 22 is made of two adjacent sectors in three neighbor cells; The base station in constituting two sectors of second cooperative cluster 22 simultaneously the CoMP user to described second cooperative cluster send signal.

User 31 belongs to the first cooperative cluster 21CoMP user among the figure.

Further, described residential quarter is hexagonal cell; Described base station is provided with respectively the smart antenna matrix towards three sectors.

The preferred switched-beam antenna of described smart antenna adopts wave beam forming to transmit to the user in designated sector.

Introduced second cooperative cluster that is constituted by two adjacent sectors with respect to traditional CoMP cooperative cluster, thereby can divide edge customer into CoMP user as much as possible, thereby effectively reduce the interference of the minizone in edge customer when communication, thus be conducive to promote edge customer handle up that.

Embodiment two:

When adopting the described CoMP cooperative cluster of embodiment one, with respect to whether being CoMP user's division methods difference in traditional CoMP cooperative cluster.As shown in Figure 3, provide a kind of preferably CoMP user division methods in the present embodiment, may further comprise the steps:

Step S1: the user calculates its signal to noise ratio SINR under non-CoMP communication pattern respectively according to the signal that receives _No-CoMPAnd the signal to noise ratio SINR under the CoMP of first cooperative cluster communication pattern _Three-CoMP

Step S2: the user judges SINR _Three-CoMPWhether be not less than three times of SINR _No-CoMP,

If then it is the first cooperative cluster CoMP user, during communication the base station in constituting three sectors of first cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal,,

Then enter step S3 if not;

Step S3: the user calculates the signal to noise ratio SINR under the CoMP of second cooperative cluster communication pattern _Two-CoMP

Step S4: the user judges SINR _Two-CoMPWhether be not less than twice SINR _No-CoMP,

If then this user is the second cooperative cluster CoMP user, during communication the base station in constituting two sectors of second cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal;

Then this user is non-CoMP user if not, and the base station sends signal to its sector, place during communication;

Wherein, described first cooperative cluster constitutes by being arranged in different districts three adjacent sectors;

Described second cooperative cluster constitutes by being arranged in different districts two adjacent sectors.

When the user is applied to the described CoMP cooperative cluster of embodiment one, need to revise the method that its CoMP user divides accordingly, and present embodiment provide a kind of preferred, based on the division methods of user's signal to noise ratio.Being calculated as follows of described CoMP user's signal to noise ratio:

$\mathrm{SINR}=\frac{p_k{\left|H_{m,k}{w}_m\right|}^2+\underset{n\&Element;C,n\&NotElement;m}{\mathrm{\&Sigma;}}{p}_n{\left|H_{n,k}{w}_n\right|}^2}{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="HDA00003364131700041.png"\; state="\{\{state\}\}">N</figure-callout>}}_0+\underset{j\&Element;\mathrm{\&gamma;}}{\mathrm{\&Sigma;}}{p}_j{\left|H_{j,k}\left(t\right)w_j\right|}^2}$

p _kThe transmitted power of the user k of expression base station m, H _{M, k}(t) be the channel gain of the user k of base station m, w _mBe the pre-coding matrix of base station m to the signal of user k transmission;

p _nThe base station is to the transmitted power of user k, H in the expression cooperative cluster _{N, k}(t) be the channel gain of n user k in base station in the cooperative cluster, w _nBe the pre-coding matrix of base station n to the signal of user k transmission;

p _jThe interference power of the outer user k of base station j of expression cooperative cluster, H _{J, k}(t) be the channel gain of the outer user k of base station j of cooperative cluster, w _jPre-coding matrix for the interference signal of the user k of base station j;

N ₀Be white Gaussian noise; C is the set of cooperative cluster base station, and γ is the set of the outer base station of cooperative cluster;

Being calculated as follows of described non-CoMP user's signal to noise ratio:

$\mathrm{SIN}{R}_K=\frac{p_k{\left|H_{m,k}{w}_m\right|}^2}{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="HDA00003364131700041.png"\; state="\{\{state\}\}">N</figure-callout>}}_0+\underset{j\&Element;\mathrm{\&gamma;}}{\mathrm{\&Sigma;}}{p}_j{\left|H_{j,k}\left(t\right)w_j\right|}^2+\underset{n\&Element;C,n\&NotEqual;m}{\mathrm{\&Sigma;}}{p}_n{\left|H_{n,k}{w}_n\right|}^2}$

p _kBe the transmitted power of the user k of base station m, H _{M, k}(t) be the channel gain of the user k of serving BS m, w _mBe the pre-coding matrix of base station m to the signal of user k transmission;

p _nThe base station is to the interference power of user k, H in the expression cooperative cluster _{N, k}(t) be the channel gain of n user k in base station in the cooperative cluster, w _nThe pre-coding matrix of the signal that sends for base station n;

p _jThe interference power of the outer user k of base station j of expression cooperative cluster, H _{J, k}(t) be the channel gain of the outer user k of base station j of cooperative cluster, w _jPre-coding matrix for the interference signal of the user k of base station j;

N ₀Be white Gaussian noise; N ₀Be white Gaussian noise; C is the set of cooperative cluster base station, and γ is the set of the outer base station of cooperative cluster.

Further, the user will divide the result and return to the base station, so that the base station communicates according to dividing the result, described user be user side in the present embodiment, as Wireless Telecom Equipments such as the mobile phone that is used for communicating by letter, flat boards.

It is a kind of simple and easy to do and divide and can optimize the edge customer communication quality, promote message capacity, guarantee CoMP user's division methods that frequency spectrum resource optimization distributes that present embodiment provides.

Embodiment three:

The present embodiment frequency spectrum resource allocation method is used for embodiment one described CoMP cooperative cluster, and the frequency spectrum resource in each residential quarter is assigned as first frequency spectrum resource, second frequency spectrum resource and the 3rd frequency spectrum resource;

Described first frequency spectrum resource is used for the first cooperative cluster CoMP telex network;

Described second frequency spectrum resource is used for the second cooperative cluster CoMP telex network;

Described first frequency spectrum resource is used for non-CoMP telex network.

Distribution for the frequency spectrum resource in each residential quarter, usually taking out specific part is non-CoMP user's communications for central user, take out part and be used for the CoMP user's communications, and the CoMP user described in the present embodiment comprises the first cooperative cluster CoMP user and the second cooperative cluster CoMP user, so be used for relative being divided into for the first cooperative cluster CoMP user's first frequency spectrum resource and second frequency spectrum resource that is used for the second cooperative cluster CoMP user of the frequency spectrum resource of CoMP telex network.Concrete allocation proportion can adopt following formula to adjust:

$\mathrm{\&alpha;}=\frac{{\mathrm{Num}}_{\mathrm{No}-\mathrm{CoMP}}}{{\mathrm{Num}}_{\mathrm{No}-\mathrm{CoMP}}+{\mathrm{Num}}_{\mathrm{three}-\mathrm{CoMP}}+{\mathrm{Num}}_{\mathrm{two}-\mathrm{CoMP}}}\&times;\mathrm{\&beta;}$

β is the ratio factor, Num _No-CoMPBe the 3rd frequency spectrum resource, Num _Three-CoMPBe first frequency spectrum resource, Num _Two-CoMPIt is second frequency spectrum resource.In concrete implementation process, the described ratio factor can just be set different values according to channel situation, to satisfy different demands, realizes simple and convenient.

As the further improvement of present embodiment, as shown in Figure 4, described frequency spectrum resource allocation method specifically may further comprise the steps:

Step 1: the base station is calculated the dispatching priority factor p of CoMP user on each frequency band respectively _c, the CoMP user in first sector dispatching priority factor p ₁, the CoMP user in second sector dispatching priority factor p ₂And the 3rd dispatching priority factor p of CoMP user in the sector ₃

Step 2: the base station judges between the dispatching priority factor of identical frequency band whether have 3p _c〉=p ₁+ p ₂+ p ₃, namely whether the magnitude relationship between the dispatching priority factor on the identical frequency band satisfies above-mentioned judgement formula;

If existing then, this frequency band is first frequency spectrum resource;

Carry out step 3 if do not exist then:

Step 3: the base station judges between the dispatching priority factor of identical frequency band whether have 2p _c〉=p ₁+ p ₂Or 2p _c〉=p ₁+ p ₃Or 2p _c〉=p ₂+ p ₃, namely the magnitude relationship between the dispatching priority factor on the identical frequency band whether satisfy at least above-mentioned judgement formula one of them;

If existing then, this frequency band is second frequency spectrum resource;

This frequency band is the 3rd frequency spectrum resource if do not exist then;

Wherein said CoMP user comprises the first cooperative cluster CoMP user and the second cooperative cluster CoMP user.

In concrete implementation process, each frequency band is all carried out above-mentioned steps 1 to the division of step 3 until all frequency bands finish.

Present embodiment provides based on embodiment one described CoMP cooperative cluster a kind of preferred frequency spectrum resource allocation method is provided.

Further, described frequency spectrum resource allocation method is characterized in that, adopts the equitable proportion algorithm to calculate p in the described step 1 _c, p ₁, p ₂And p ₃The PF algorithm is the algorithm of technology maturation, realizes simple and efficiently, and detailed content is not just given unnecessary details at this.

Further, described frequency spectrum resource allocation method is periodic dynamic frequency spectrum deployment method.The change of the movement of the user in the residential quarter, discrepancy, channel quality all can affect to communication quality, message capacity, in order to obtain better communication quality and message capacity, so adopt dynamic assignment, periodically upgrades the allocative decision of frequency spectrum.

In 19 orthohexagonal residential quarters, at least constituted in first cooperative cluster, three residential quarters second cooperative cluster that constitutes of any two adjacent sectors in per three residential quarters adjacent one another are by three adjacent sectors in two residential quarters, the distance of the base station of two minizones is 500m, the communication frequency that adopts is 2GHZ, communication bandwidth is 10MHZ, the frequency band that is divided into 50 isolation, be provided with 12 subcarriers in each frequency band, be provided with 10 each user in each sector, user's average translational speed is 3km/h, and the data of transmitting antenna and reception antenna are 2.Whether and to adopt user's division methods of the present invention to carry out the user be CoMP user's division, adopt frequency spectrum resource allocation method of the present invention to carry out the distribution of frequency spectrum resource, obtained design sketch as Fig. 5-shown in Figure 6 by emulation and with the contrast of conventional method.

Fig. 5 be CoMP cooperative cluster of the present invention under the spectrum allocation may of frequency spectrum resource allocation method of the present invention message capacity and traditional CoMP cooperative cluster at the comparison diagram of the following message capacity of polling dispatching method;

Fig. 6 is that CoMP cooperative cluster of the present invention is at the comparison diagram of message capacity, the traditional C oMP cooperative cluster message capacity under the frequency spectrum polling dispatching method in frequency spectrum fixed allocation method and traditional C oMP cooperative cluster under the spectrum allocation may of frequency spectrum resource allocation method of the present invention.

So from Fig. 5-Fig. 6 as can be known, the present invention effectively raises user throughput guaranteeing that non-CoMP user has obtained also to have selected optimum spectrum allocation may forwarding method according to channel outside the distribution of fixed frequency spectrum resource, has optimized resource utilization.

Above execution mode only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (8)

1. a CoMP cooperative cluster is arranged in three adjacent residential quarters; Each described residential quarter is divided into three sectors centered by the base station, it is characterized in that, comprises first cooperative cluster and second cooperative cluster;

Described first cooperative cluster is made of the three adjacent sectors that are positioned at different described residential quarters; The base station in constituting three sectors of first cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal;

Described second cooperative cluster constitutes by being arranged in different districts two adjacent sectors; The base station in constituting two sectors of second cooperative cluster simultaneously the CoMP user to described second cooperative cluster send signal.

2. CoMP cooperative cluster according to claim 1 is characterized in that, described residential quarter is hexagonal cell; Described base station is provided with respectively the smart antenna matrix towards three sectors.

3. CoMP user's division methods is characterized in that, may further comprise the steps:

Step S1: the user calculates its signal to noise ratio SINR under non-CoMP communication pattern respectively according to the signal that receives _No-CoMPAnd the signal to noise ratio SINR under the CoMP of first cooperative cluster communication pattern _Three-CoMP

Step S2: the user judges SINR _Three-CoMPWhether be not less than three times of SINR _No-CoMP,

If then it is the first cooperative cluster CoMP user, during communication the base station in constituting three sectors of first cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal,

Then enter step S3 if not;

Step S3: the user calculates the signal to noise ratio SINR under the CoMP of second cooperative cluster communication pattern _Two-CoMP

Step S4: the user judges SINR _Two-CoMPWhether be not less than twice SINR _No-CoMP,

If then this user is the second cooperative cluster CoMP user, during communication the base station in constituting two sectors of second cooperative cluster simultaneously the CoMP user to described first cooperative cluster send signal,

Then this user is non-CoMP user if not, and the base station sends signal to its sector, place during communication;

Wherein, described first cooperative cluster constitutes by being arranged in different districts three adjacent sectors;

Described second cooperative cluster constitutes by being arranged in different districts two adjacent sectors.

4. CoMP user's division methods according to claim 3 is characterized in that, also comprises step S5:

The user will divide the result and return the base station.

5. a frequency spectrum resource allocation method is used for the described CoMP cooperative cluster of claim 1, it is characterized in that the frequency spectrum resource in each residential quarter is assigned as first frequency spectrum resource, second frequency spectrum resource and the 3rd frequency spectrum resource;

Described first frequency spectrum resource is used for the first cooperative cluster CoMP telex network;

Described second frequency spectrum resource is used for the second cooperative cluster CoMP telex network;

Described first frequency spectrum resource is used for non-CoMP telex network.

6. frequency spectrum resource allocation method according to claim 5 is characterized in that, specifically may further comprise the steps:

Step 1: the base station is calculated the dispatching priority factor p of CoMP user on each frequency band respectively _c, the CoMP user in first sector dispatching priority factor p ₁, the CoMP user in second sector dispatching priority factor p ₂And the 3rd dispatching priority factor p of CoMP user in the sector ₃

Step 2: the base station judges between the dispatching priority factor of identical frequency band whether have 3p _c〉=p ₁+ p ₂+ p ₃,

If existing then, this frequency band is first frequency spectrum resource;

Carry out step 3 if do not exist then:

Step 3: the base station judges between the dispatching priority factor of identical frequency band whether have 2p _c〉=p ₁+ p ₂Or 2p _c〉=p ₁+ p ₃Or 2p _c〉=p ₂+ p ₃,

If existing then, this frequency band is second frequency spectrum resource;

This frequency band is the 3rd frequency spectrum resource if do not exist then;

Wherein said CoMP user comprises the first cooperative cluster CoMP user and the second cooperative cluster CoMP user.

7. frequency spectrum resource allocation method according to claim 6 is characterized in that, adopts equitable proportion to calculate p in the described step 1 _c, p ₁, p ₂And p ₃

8. according to each described frequency spectrum resource allocation method of claim 5-7, it is characterized in that described frequency spectrum resource allocation method is periodic dynamic frequency spectrum deployment method.

Images