Background technology
In order to tackle the market competition of WiMAX standard, realize the fusion of mobile communication and wireless access wide band technology, the 3rd generation partner program (3rd Generation Partnership Project, 3GPP) tissue has started Long Term Evolution (Long Term Evolution, LTE) project.LTE aloft interface aspect adopts frequency division multiple access (OFDM/FDMA) to substitute code division multiple access (CDMA) mode of 3-G (Generation Three mobile communication system) (3G).Reduce time delay, improve user data rate, improve power system capacity and covering, the cost of reduction operator is the important goal of LTE.
The follow-up evolution of Long Term Evolution project (Long Term Evolution-Advanced, LTE-A) propose to adopt multipoint cooperative (Coordinated Multi-Point, CoMP) coverage, cell edge throughput and/or the raising throughput of system of transmission in the system to improve the sub-district high data rate.The principle of CoMP mainly is to reduce presence of intercell interference by a plurality of community associated processing or coordinated scheduling.CoMP is divided into two types: Combined Treatment (Joint Processing) and coordinated scheduling/wave beam forming (CoordinatedScheduling/Beamforming).This dual mode all needs co-operating minizone to carry out the mutual of certain information.
(Reference Signal is to offer a kind of known signal that receiving terminal is used for channel estimating or channel detection by transmitting terminal RS) to reference signal.In the LTE-A system, adopt SRS to carry out uplink channel estimation to realize up frequency domain dispatching.In addition, (User Equipment, UE) SRS in the data transfer bandwidth can be used as data demodulates, the timing when SRS also helps UE arrowband or low-frequency degree uplink at user terminal.In order to realize dispatching more efficiently, CoMP user not only will send SRS to this Serving cell, needs simultaneously to send SRS to cooperation cell.
The subframe position that sends SRS for the user in the 3GPP technical specification Rel-8 version formulates the following rules: there is exclusive SRS sequence set each sub-district, and in each sub-district the user to send the exclusive parameter in sub-district that the subframe of SRS carries by the exclusive broadcast signaling in this sub-district be that SRS sub-frame configuration parameter (srsSubframeConfiguration) is configured, each sub-district separate configurations SRS sub-frame configuration parameter separately.SRS sub-frame configuration parameter has 16 kinds of configurations (i.e. 16 kinds of values), and every kind of configuration is indicated by 4 bits, and the subframe that every kind of corresponding a kind of subframe set of configuration, every kind of subframe set are comprised is by period TSFCAnd shifted by deltaSFCLimit, particularly, every kind of subframe is gathered the subframe set that is comprised and can be used formula: { nSf: nSfMod TSFCThe ∈ ΔSFCExpression, wherein, nSfBe subframe numbers.Listed every kind of period T that configuration is corresponding respectively in the table 1SFCAnd shifted by deltaSFC
| The configuration numbering | Binary system | Period TSFC(subframe) | Shifted by deltaSFC(subframe) |
| ??0 | ??0000 | ??1 | ??{0} |
| The configuration numbering | Binary system | Period TSFC(subframe) | Shifted by deltaSFC(subframe) |
| ??1 | ??0001 | ??2 | ??{0} |
| ??2 | ??0010 | ??2 | ??{1} |
| ??3 | ??0011 | ??5 | ??{0} |
| ??4 | ??0100 | ??5 | ??{1} |
| ??5 | ??0101 | ??5 | ??{2} |
| ??6 | ??0110 | ??5 | ??{3} |
| ??7 | ??0111 | ??5 | ??{0,1} |
| ??8 | ??1000 | ??5 | ??{2,3} |
| ??9 | ??1001 | ??10 | ??{0} |
| ??10 | ??1010 | ??10 | ??{1} |
| ??11 | ??1011 | ??10 | ??{2} |
| ??12 | ??1100 | ??10 | ??{3} |
| ??13 | ??1101 | ??10 | ??{0,1,2,3,4,6,8} |
| ??14 | ??1110 | ??10 | ??{0,1,2,3,4,5,6,8} |
| ??15 | ??1111 | Keep | Keep |
Table 1
As shown in table 1, when SRS sub-frame configuration parameter value is arbitrary value in " 0000 "~" 1110 ", then indicate and in each radio frames, can utilize this subframe that is worth in the pairing subframe set to carry out transmitting SRS, and when SRS sub-frame configuration parameter value is " 1111 ", then the SRS that the user sends in this sub-district is closed in indication, this value is applicable in the scene of working as the user who mainly serves high-speed mobile in a sub-district, because, the quick time-varying characteristics of channel will make that the result of channel estimating is unreliable, therefore, need close the SRS that the user sends in this sub-district this moment.Can be used to send in the subframe of SRS in the exclusive parameter configuration in sub-district, SRS always is arranged on last SC-FDMA symbol and sends, on this SC-FDMA symbol, even the user does not send SRS, this position does not allow to send the data message of PUSCH yet, thereby prevents the interference that other is sent the user of SRS at this symbol.
The SRS mechanism that defines in the above-mentioned 3GPP technical specification Rel-8 version is not suitable for directly applying under the CoMP background.Its reason is: when the CoMP user of Serving cell when cooperation cell sends SRS, non-CoMP user in the cooperation cell is because proper communication also needs to send SRS, and this class user can not perceive CoMP user's existence, like this, the user that the CoMP user of Serving cell and its cooperation cell will occur sends the situation of SRS in same subframe position.And, but though quadrature between the SRS sequence in the same sub-district, but when the user of the CoMP user of Serving cell and its cooperation cell when same subframe position sends SRS, between different SRS sequence set because the difference of its basic sequence, sequence length etc., make and to satisfy orthogonality between them, like this, the SRS signal of non-CoMP user and CoMP user's emission just can produce strong interference when receiving in the base station mutually, has a strong impact on the accuracy of channel estimating.Be that example is illustrated this below with Fig. 1.As shown in Figure 1, when CoMP UE1 in the sub-district 1 and the UE in the sub-district 2 (UE2 and UE3) send the SRS parameter on the position of oval solid line indication, to disturb, and belong to the UE2 of sub-district 2 and UE3 when on the position of oval dotted line indication, sending the SRS parameter, and then can not disturb.
In order to solve the SRS interference problem of above-mentioned CoMP minizone, at present, propose among the 3GPP motion R1-092367 can consider CoMP user is adopted a kind of new SRS sequences Design, with by making non-CoMP user's the SRS of the mutually orthogonal CoMP of minimizing of SRS sequence minizone of CoMP user and cooperation cell disturb, though this thinking can reach the expection of quadrature, but run counter to the aim of LTE-A backward compatibility, need carry out very large change to agreement, and need quite meticulous design could guarantee the orthogonality of SRS between CoMP user and LTE user, therefore, do not have feasibility.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of collocation method of detection reference signal, and the SRS that this method can effectively reduce the multipoint cooperative minizone disturbs, and simultaneously existing system is had good compatibility.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
The collocation method of a kind of detection reference signal (SRS), this method may further comprise the steps:
A, for every kind of configuration of SRS sub-frame configuration parameter, determine and the configuration of this configuration quadrature that described quadrature is not have identical subframe in each self-corresponding subframe set of two kinds of configurations;
B, all configurations of SRS sub-frame configuration parameter are divided into groups, obtain the configuration of three groups of SRS sub-frame configuration parameters;
C, be adjacent the principle that the sub-district belongs to the inhomogeneity sub-district, all sub-districts are divided three classes according to each sub-district, described three class sub-districts are corresponding one by one with the configuration of described three groups of SRS sub-frame configuration parameters;
D, for each sub-district, according to the number of user terminal (UE) and the translational speed of described UE in this sub-district, according to the configuration of preferential selection and the SRS sub-frame configuration parameter of its adjacent sub-district principle of the configuration of quadrature mutually, from the configuration of the pairing one group of SRS sub-frame configuration parameter in this sub-district, select a kind of SRS sub-frame configuration parameter to be configured to this sub-district;
E, each sub-district are provided with the SRS subframe that each UE takies in this sub-district according to the pairing subframe set of the SRS sub-frame configuration parameter of this sub-district by SRS configuration index parameter.
Preferably, further comprise after the described step e:
F, each sub-district SRS subframe that the multipoint cooperative UE in this sub-district is shared are notified to the cooperation cell of described multipoint cooperative UE, during UE in described cooperation cell is dispatched its sub-district, avoid on last symbol on the shared SRS subframe of described multipoint cooperative UE, sending upstream data.
Preferably, further comprise between described steps d and the e:
X, judge the configuration quadrature whether of the SRS sub-frame configuration parameter of each minizone with cooperation relation, if not, then according to the SRS sub-frame configuration of the SRS sub-frame configuration of the non-multipoint cooperative UE of cooperation cell and the multipoint cooperative UE of the Serving cell principle of quadrature mutually, the SRS sub-frame configuration scope of non-multipoint cooperative UE of described each sub-district with cooperation relation and the SRS sub-frame configuration scope of multipoint cooperative UE are set;
Described step e is:
For each sub-district, if in step e, be provided with the SRS sub-frame configuration scope of non-multipoint cooperative UE of this sub-district and the SRS sub-frame configuration scope of multipoint cooperative UE, then in the described non-multipoint cooperative UE sub-frame configuration scope of this sub-district, by SRS configuration index parameter the SRS subframe that each non-multipoint cooperative UE takies in this sub-district is set, in the multipoint cooperative UE of this sub-district sub-frame configuration scope, the SRS subframe that each multipoint cooperative UE takies in this sub-district is set by SRS configuration index parameter; Otherwise, in the pairing subframe range of convergence of the SRS of this sub-district sub-frame configuration parameter, the SRS subframe that each UE takies in this sub-district is set by SRS configuration index parameter.
Preferably, the SRS sub-frame configuration scope of non-multipoint cooperative UE of described each sub-district with cooperation relation and the SRS sub-frame configuration scope of multipoint cooperative UE being set is:
For in described I the sub-district with cooperation relation | CF
i| maximum sub-district max, will
As the SRS sub-frame configuration of the multipoint cooperative UE of this sub-district, will
As the SRS sub-frame configuration of the non-multipoint cooperative UE of this sub-district, wherein, CF
iBe the subframe set of the SRS sub-frame configuration parameter correspondence of cell i, | CF
Max|>| CF
i|, i ∈ 1,2 ..., I}, and i ≠ max, | CF
i| be the sub-frame number in the subframe set of the SRS sub-frame configuration parameter correspondence of cell i, Γ={ p: having among the max of sub-district with sub-district p is the multipoint cooperative UE} of cooperation cell, Φ={ q: have sub-district max to think the multipoint cooperative UE} of cooperation cell among the q of sub-district;
For each cell i of other except that the max of sub-district in described I the sub-district with cooperation relation, the SRS sub-frame configuration scope of the SRS sub-frame configuration scope of the non-multipoint cooperative UE of this sub-district and multipoint cooperative UE all is set to the pairing subframe set of the SRS sub-frame configuration parameter CF of this sub-districti
The collocation method of a kind of detection reference signal (SRS), this method may further comprise the steps:
A, for every kind of configuration of SRS sub-frame configuration parameter, determine and the configuration of this configuration quadrature that described quadrature is not have identical subframe in each self-corresponding subframe set of two kinds of configurations;
B, from all of SRS sub-frame configuration parameter have the configuration of orthogonal configuration, select the configuration more than three kinds, selected configuration divided into groups, wherein, the configuration in every group all with other two groups in configuration quadrature mutually;
C, be adjacent the principle that the sub-district belongs to the inhomogeneity sub-district, all sub-districts are divided three classes according to each sub-district, described three class sub-districts are corresponding one by one with the configuration of described three groups of SRS sub-frame configuration parameters;
D, for each sub-district, according to the number of user terminal (UE) and the translational speed of described UE in this sub-district, from the configuration of the pairing one group of SRS sub-frame configuration parameter in this sub-district, select a kind of SRS sub-frame configuration parameter to be configured to this sub-district;
E, each sub-district are provided with the SRS subframe that each UE takies in this sub-district according to the pairing subframe set of the SRS sub-frame configuration parameter of this sub-district by SRS configuration index parameter.
Preferably, further comprise after the described step e:
The SRS subframe that multipoint cooperative UE in this sub-district is shared is notified to the cooperation cell of described multipoint cooperative UE, described cooperation cell is avoided sending upstream data on last symbol on the shared SRS subframe of described multipoint cooperative UE when the UE of scheduling in its sub-district.
In sum, the collocation method of the detection reference signal that the present invention proposes, the SRS subframe of non-multipoint cooperative UE by avoiding multipoint cooperative UE and its cooperation cell on time domain as far as possible occurs overlapping, thereby the SRS that can effectively reduce between cooperation cell disturbs, simultaneously, the present invention can still adopt the frame structure of existing LTE system, and the original system parameter itself is not changed, just the option to parameter value is limited, and therefore existing system is had better compatibility backward.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: when each sub-district being carried out sub-district obligate parameter aspect SRS configuration, when promptly SRS sub-frame configuration parameter being configured, be of the SRS sub-frame configuration parameter mutually configuration of quadrature of this cell configuration with its adjacent sub-district as far as possible, like this, overlapping situation appears in the SRS subframe that just can reduce the non-multipoint cooperative UE of multipoint cooperative UE and its cooperation cell on time domain, thereby the SRS that can effectively reduce between cooperation cell disturbs.
Fig. 2 is the flow chart of the embodiment of the invention one, and as shown in Figure 2, the embodiment of the invention one mainly comprises:
Step 201, for every kind of configuration of SRS sub-frame configuration parameter, determine configuration with this configuration quadrature.
Here, described quadrature is meant in each self-corresponding subframe set of two kinds of configurations and does not have identical subframe.
In this step, need be to every kind of configuration of existing SRS sub-frame configuration parameter, determine and this configuration configuration of quadrature mutually (i.e. the orthogonal configuration that should dispose), so that can be in subsequent process according to the orthogonal configuration of each configuration, be the SRS sub-frame configuration parameter of each cell configuration cell orthogonal adjacent as far as possible, overlapping situation occur with the SRS subframe of the non-multipoint cooperative UE that on time domain, reduces multipoint cooperative UE and its cooperation cell with it.Particularly, the set of the orthogonal configuration of every kind of configuration of existing SRS sub-frame configuration parameter can describe by table 2.
| The configuration numbering | Binary system | Period TSFC(subframe) | Shifted by deltaSFC(subframe) | The numbering of orthogonal configuration |
| ??0 | ??0000 | ??1 | ??{0} | Do not have |
| ??1 | ??0001 | ??2 | ??{0} | ??2、10、12 |
| ??2 | ??0010 | ??2 | ??{1} | ??1、9、11 |
| ??3 | ??0011 | ??5 | ??{0} | ??4、5、6、8、10、11、12 |
| The configuration numbering | Binary system | Period TSFC(subframe) | Shifted by deltaSFC(subframe) | The numbering of orthogonal configuration |
| ??4 | ??0100 | ??5 | ??{1} | ??3、5、6、8、9、11、12 |
| ??5 | ??0101 | ??5 | ??{2} | ??3、4、6、7、9、10、12 |
| ??6 | ??0110 | ??5 | ??{3} | ??3、4、5、7、9、10、11 |
| ??7 | ??0111 | ??5 | ??{0,1} | ??5、6、8、11、12 |
| ??8 | ??1000 | ??5 | ??{2,3} | ??3、4、7、9、10 |
| ??9 | ??1001 | ??10 | ??{0} | ??2、4、5、6、8、10、11、12 |
| ??10 | ??1010 | ??10 | ??{1} | ??1、3、5、6、8、9、11、12 |
| ??11 | ??1011 | ??10 | ??{2} | ??2、3、4、6、7、9、10、12 |
| ??12 | ??1100 | ??10 | ??{3} | ??1、3、4、5、7、9、10、11 |
| ??13 | ??1101 | ??10 | ??{0,1,2,3??,4,6,8} | Do not have |
| ??14 | ??1110 | ??10 | ??{0,1,2,3??,4,5,6,8??} | Do not have |
| ??15 | ??1111 | Keep | Keep | Keep |
Table 2
Provided in the table 2 and disposed 0~14 separately orthogonal configuration.For example, for configuration 1, with its quadrature dispose configuration 2,10,12 3 kind of configuration, and for configuration 0, because its period of sub-frame is 1 subframe, and shifted by deltaSFCBe 0 subframe, this will mean that this disposes in the set of 0 pairing subframe and will comprise all subframes, and correspondingly, with it overlapping configuration of subframe not taking place will not exist, and therefore, configuration 0 does not have orthogonal configuration, and similarly, there is not orthogonal configuration in configuration 13,14 yet.In addition, because configuration 15 is the reservation item, correspondingly orthogonal configuration is also uncertain for it.
Step 202, all configurations of SRS sub-frame configuration parameter are divided into groups, obtain the configuration of three groups of SRS sub-frame configuration parameters.
This step, all configurations of SRS sub-frame configuration parameter are divided into three groups, so that when in subsequent process the SRS sub-frame configuration parameter of each sub-district being configured, it is inequality that the SRS sub-frame configuration parameter of guaranteeing each sub-district can be adjacent the SRS sub-frame configuration parameter of sub-district.
Preferably, can be according to the configuration principle of quadrature mutually that makes in configuration and other groups of every group as far as possible, carry out the division of above-mentioned three configuration set, like this, when in step 204, being configured for the SRS sub-frame configuration parameter of each sub-district, can more easily select the configuration configuration of quadrature mutually with the SRS sub-frame configuration parameter of its adjacent sub-district, thereby make the configuration phase quadrature of the SRS sub-frame configuration parameter of different districts to a greater degree, help further reducing the interference of multipoint cooperative minizone.
Step 203, be adjacent the principle that the sub-district belongs to the inhomogeneity sub-district, all sub-districts are divided three classes according to each sub-district, described three class sub-districts are corresponding one by one with the configuration of described three groups of SRS sub-frame configuration parameters.
In this step, all are distinguished into three classes for a short time, and make each sub-district be adjacent the sub-district to belong to inhomogeneous sub-district, then with three class sub-districts respectively with step 202 in determined three groups of SRS sub-frame configuration parameters corresponding one by one, like this, for each sub-district, will with corresponding respectively not on the same group the configuration of SRS sub-frame configuration parameter in its adjacent sub-district.
Particularly, the configuration relation of three class sub-districts and three groups of SRS sub-frame configuration parameters can be elaborated by the example among Fig. 3.
Among Fig. 3, the configuration of three groups of SRS sub-frame configuration parameters represents with A, B, C respectively, wherein, and A={A1, A2, B={B1, B2, B3, B4, B5, C={C1, C2, C3, C4, C5, the configuration A1 in the A group has been used in sub-district 1, and the neighbor cell of sub-district 1 has then used the configuration in B group or the C group, and sub-district 2 is similar with the situation of sub-district 1.As seen, by above-mentioned to the sub-district classification and to the grouping of the configuration of SRS sub-frame configuration parameter, can guarantee corresponding respectively not on the same group the configuration of SRS sub-frame configuration parameter in the adjacent sub-district of this sub-district and its.
Step 204, for each sub-district, according to the number of user terminal (UE) and the translational speed of described UE in this sub-district, according to the configuration of preferential selection and the SRS sub-frame configuration parameter of its adjacent sub-district principle of the configuration of quadrature mutually, from the configuration of the pairing one group of SRS sub-frame configuration parameter in this sub-district, select a kind of SRS sub-frame configuration parameter to be configured to this sub-district.
This step is when specific implementation, for each sub-district, those skilled in the art need can determine the suitable SRS time domain density in this sub-district according to the translational speed of number He this sub-district UE of this sub-district UE, determine the suitable configurations of SRS sub-frame configuration parameter according to this SRS time domain density.For example, if it is all less than number of users in slow or the sub-district to activate the translational speed of UE in the sub-district, but the configuration of the SRS sub-frame configuration parameter that then selection cycle is bigger; Otherwise select less configuration of cycle.
In this step, for each sub-district, in the configuration scope of the pairing one group of SRS sub-frame configuration parameter in this sub-district, determine the configuration of this sub-district SRS sub-frame configuration parameter, owing to make the adjacent sub-district of each sub-district and its distinguish corresponding not on the same group the configuration of SRS sub-frame configuration parameter by step 204, therefore, can be by this step so that each sub-district is adjacent the configuration that the sub-district has different SRS sub-frame configuration parameters.
In addition, because this step is according to the configuration of preferential selection and the SRS sub-frame configuration parameter of its adjacent sub-district principle of the configuration of quadrature mutually, for the SRS sub-frame configuration parameter of each sub-district is configured, like this, can guarantee largely that each sub-district is adjacent the configuration that the sub-district has the SRS sub-frame configuration parameter of phase quadrature, thereby can effectively reduce the interference of multipoint cooperative sub-district.
Further, if in step 202 according to the principle of the configuration quadrature in the configuration that makes every group of SRS sub-frame configuration parameter and other group as far as possible, divide the configuration of above-mentioned three groups of SRS sub-frame configuration parameters, then for the configuration of one group of SRS sub-frame configuration parameter, wherein the configuration of quadrature is more mutually with the configuration of other groups, like this, to be easier to a kind ofly can to satisfy the configuration of " with the configuration of the SRS sub-frame configuration parameter of its adjacent sub-district quadrature mutually " this condition, thereby reduce the interference of multipoint cooperative minizone to a greater degree for each cell selecting goes out.
By above-mentioned steps as can be seen, the orthogonality (being SRS sub-frame configuration parameter) of the SRS parameter by utilizing the exclusive aspect in sub-district, adjacent with it the in time sub-district of SRS resource that more sub-district is used is distinguished, thereby can effectively reduce the interference of multipoint cooperative minizone.Further, for SRS sub-frame configuration parameter between cooperation cell can not quadrature situation, can be by the SRS sub-frame configuration scope of the non-multipoint cooperative UE of these sub-districts and the SRS sub-frame configuration scope of multipoint cooperative UE be provided with, make the SRS sub-frame configuration quadrature mutually of SRS sub-frame configuration and the multipoint cooperative UE of Serving cell of the non-multipoint cooperative UE of cooperation cell.Particularly, can in step 204, realize by following step:
Judge the configuration quadrature whether of the SRS sub-frame configuration parameter of each minizone with cooperation relation, if not, then according to the SRS sub-frame configuration of the SRS sub-frame configuration of the non-multipoint cooperative UE of cooperation cell and the multipoint cooperative UE of the Serving cell principle of quadrature mutually, the SRS sub-frame configuration scope of non-multipoint cooperative UE of described each sub-district with cooperation relation and the SRS sub-frame configuration scope of multipoint cooperative UE are set.
This step can realize by Centralized Controller.
Particularly, be provided with the SRS sub-frame configuration scope of non-multipoint cooperative UE of described each sub-district with cooperation relation and multipoint cooperative UE SRS sub-frame configuration scope method can for:
For in described I the sub-district with cooperation relation | CFi| maximum sub-district max, willAs the SRS sub-frame configuration of the multipoint cooperative UE of this sub-district, willAs the SRS sub-frame configuration of the non-multipoint cooperative UE of this sub-district, wherein, CFiBe the subframe set of the SRS sub-frame configuration parameter correspondence of cell i, | CFMax|>| CFi|, i ∈ 1,2 ..., I}, and i ≠ max, | CFi| be the sub-frame number in the subframe set of the SRS sub-frame configuration parameter correspondence of cell i, Γ={ p: having among the max of sub-district with sub-district p is the multipoint cooperative UE} of cooperation cell, Φ={ q: have sub-district max to think the multipoint cooperative UE} of cooperation cell among the q of sub-district.
For example, when I=3, according to the method described above can be as shown in the table to being provided with of SRS sub-frame configuration scope of the SRS sub-frame configuration scope of the non-multipoint cooperative UE of three sub-districts (sub-district 1, sub-district 2 and sub-district 3) and multipoint cooperative UE with cooperation relation:
Table 3
In the table 3, suppose | CF1|>| CF2|>| CF3|, i.e. sub-frame number in the subframe of the SRS sub-frame configuration parameter correspondence of sub-district 1 set is maximum,
For each cell i of other except that the max of sub-district in described I the sub-district with cooperation relation, the SRS sub-frame configuration scope of the SRS sub-frame configuration scope of the non-multipoint cooperative UE of this sub-district and multipoint cooperative UE all is set to the pairing subframe set of the SRS sub-frame configuration parameter CF of this sub-districti
Step 205, each sub-district are provided with the SRS subframe that each UE takies in this sub-district according to the pairing subframe set of the SRS sub-frame configuration parameter of this sub-district by SRS configuration index parameter.
Here, in step 204, finished configuration to the SRS sub-frame configuration parameter of each sub-district after, will be in this disposes pairing subframe range of convergence, select one or more sub-frame configuration to give each UE in the sub-district, thereby finish SRS sub-frame configuration process.
Further, if the SRS sub-frame configuration scope of the non-multipoint cooperative UE of the cooperation cell that SRS sub-frame configuration parameter can not quadrature in step 204 and the SRS sub-frame configuration scope of multipoint cooperative UE are provided with, then this step will adopt down mode to realize:
For each sub-district, if in step 204, be provided with the SRS sub-frame configuration scope of non-multipoint cooperative UE of this sub-district and the SRS sub-frame configuration scope of multipoint cooperative UE, then in the described non-multipoint cooperative UE sub-frame configuration scope of this sub-district, by SRS configuration index parameter the SRS subframe that each non-multipoint cooperative UE takies in this sub-district is set, in the multipoint cooperative UE of this sub-district sub-frame configuration scope, the SRS subframe that each multipoint cooperative UE takies in this sub-district is set by SRS configuration index parameter; Otherwise, in the pairing subframe range of convergence of the SRS of this sub-district sub-frame configuration parameter, the SRS subframe that each UE takies in this sub-district is set by SRS configuration index parameter.
By above-mentioned steps, can guarantee the SRS sub-frame configuration quadrature mutually of SRS sub-frame configuration and the multipoint cooperative UE of Serving cell of the non-multipoint cooperative UE of cooperation cell, thereby can further avoid the interference between cooperation cell.
Further, can further include following step after the step 205, with of the effective inhibition of further raising present embodiment to disturbing between cooperation cell:
Each sub-district SRS subframe that the multipoint cooperative UE in this sub-district is shared is notified to the cooperation cell of described multipoint cooperative UE, during UE in described cooperation cell is dispatched its sub-district, avoid on last symbol on the shared SRS subframe of described multipoint cooperative UE, sending upstream data.
Technical scheme by the foregoing description one as can be seen, preferably, the configuration of the SRS parameter (being SRS configuration index parameter) that the embodiment of the invention one can be by the exclusive aspect in sub-district and the SRS parameter (being SRS configuration index parameter) of user level farthest reduces the interference between cooperation cell.In actual applications, can also only pass through the configuration of the SRS parameter of the exclusive aspect in sub-district, reach the purpose of disturbing between above-mentioned minimizing cooperation cell, be elaborated below by the embodiment of the invention two.
Fig. 4 is the flow chart of the embodiment of the invention two.As shown in Figure 2, this embodiment two may further comprise the steps:
Step 401, for every kind of configuration of SRS sub-frame configuration parameter, determine configuration with this configuration quadrature.
The specific implementation of this step is identical with step 201, does not repeat them here.
Step 402, from all of SRS sub-frame configuration parameter have the configuration of orthogonal configuration, select the configuration more than three kinds, selected configuration divided into groups, wherein, the configuration in every group all with other two groups in configuration quadrature mutually.
This step, has the configuration of orthogonal configuration at all, select part or all of configuration, construct three configuration set, this three configuration set need satisfy condition: the configuration in every group all with other two groups in configuration quadrature mutually, like this, when in step 405, utilizing the pairing one group of SRS sub-frame configuration parameter in each sub-district that each sub-district is configured, can guarantee the SRS sub-frame configuration parameter quadrature of the SRS sub-frame configuration parameter sub-district adjacent that each sub-district disposes with it, thereby can realize that the SRS resource that each sub-district disposes is a quadrature on time domain, thereby can farthest avoid the interference between cooperation cell.
The concrete above-mentioned three groups of SRS sub-frame configuration parameters of how many arrangements of selecting in this step, can determine according to actual needs by those skilled in the art, can construct three groups of configurations of satisfying the SRS sub-frame configuration parameter of above-mentioned condition as long as can guarantee selected configuration.
Step 403, be adjacent the principle that the sub-district belongs to the inhomogeneity sub-district, all sub-districts are divided three classes according to each sub-district, described three class sub-districts are corresponding one by one with the configuration of described three groups of SRS sub-frame configuration parameters.
The specific implementation of this step is identical with step 203, does not repeat them here.
Step 404, for each sub-district, according to the number of user terminal (UE) and the translational speed of described UE in this sub-district, from the configuration of the pairing one group of SRS sub-frame configuration parameter in this sub-district, select a kind of SRS sub-frame configuration parameter to be configured to this sub-district.
Step 405, each sub-district are provided with the SRS subframe that each UE takies in this sub-district according to the pairing subframe set of the SRS sub-frame configuration parameter of this sub-district by SRS configuration index parameter.
Further, reduce the validity of disturbing between cooperation cell, can further include after the described step 405 in order further to improve present embodiment:
The SRS subframe that multipoint cooperative UE in this sub-district is shared is notified to the cooperation cell of described multipoint cooperative UE, described cooperation cell is avoided sending upstream data on last symbol on the shared SRS subframe of described multipoint cooperative UE when the UE of scheduling in its sub-district.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.