CN104185286A - Method and system for downlink interference coordination of long term evolution (LTE) system and LTE base station - Google Patents
Method and system for downlink interference coordination of long term evolution (LTE) system and LTE base station Download PDFInfo
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Abstract
The invention discloses a method and system for downlink interference coordination of a long term evolution (LTE) system and an LTE base station. The method comprises the steps of calculating neighbor cell factors of each neighbor cell corresponding to a local cell, calculating interference indication lists of each neighbor cell, adding each interference indication list, screening a final high-interference physical resource block out of the interference indication lists, and finally performing interference coordination on edge users and central users in the local cell. By calculating the neighbor cell factors of each neighbor cell corresponding to the local cell, the degree of interference to the local cell caused by the neighbor cells is reflected correctly, the interference indication lists of each neighbor cell are calculated according to the neighbor cell factors, the different interference indication lists are different due to the different neighbor cell factors, the final high-interference physical resource block can be screened accurately in the follow-up process, the problem of misjudging a low-interference physical resource block as the final high-interference physical resource block is solved, and the edge users have high throughput in the interference coordination process.
Description
[technical field]
The present invention relates to mobile communication technology field, particularly relate to a kind of LTE system descending disturbance coordination method, system and LTE base station.
[background technology]
LTE system descending adopts OFDMA (Orthogonal Frequency Division Multiple Access, OFDM), up employing SC-FDMA (Single-carrier Frequency-Division Multiple Access, single-carrier frequency division multiple access) technology is as transmission means.These multiple access technologies utilize the orthogonality between frequency, make in theory, and between this community user, be non-interfering.All users' interference is mainly derived from the edge customer of community, the especially community of other use same frequency resources, and the co-channel interference that is subject to neighbor cell is especially serious.LTE system is using the performance of improving edge customer as an importance improving throughput of system performance, and for the performance that how to improve edge customer, proposed a lot of solutions.Its frequency domain ICIC (Inter-Cell Interference Coordination, Inter-Cell Interference Coordination) technology is exactly by orthogonalized frequency range used edge customer a kind of interference coordination technique.
For descending, LTE specification provides RNTP (Relative Narrowband Tx Power, Relative Narrowband TX Power) parameter to be used for supporting dynamic interference coordination.RNTP is the one prediction to high interference in future region, and the minimum period of renewal is 20ms, is realized by the bit mapping of corresponding RB (Resource Block: Resource Block), for example, represents high interference with " 1 ", represents low interference with " 0 ".
Carry out in the technology of downlink interference collaboration at existing use RNTP, normally, according to the priority of relative RNTP and the definite each user's who participates in Inter-Cell Interference Coordination of neighboring BS information PRB, scheduler module is carried out scheduling of resource and power division according to priority.The priority of described PRB, to obtain according to adjacent area interference power, adjacent area RNTP, local area RNTP, the calculating carried out under the factor such as PRB number of the mutual adjacent area number of ICIC, this community and adjacent area, due to more difficult accurate acquisition adjacent area interference power, therefore the priority of each PRB is inaccurate, and be subject to the impact of Dui Zhe community, the each adjacent area of the reason such as distance and signal transmission power also inconsistent, finally in the middle of the process of interference coordination, be difficult to ensure that the edge customer of this community can obtain higher throughput.
[summary of the invention]
Based on this, be necessary to be difficult in the middle of the process of interference coordination for prior art ensure that the edge customer of this community can obtain the problem of higher throughput, a kind of LTE system descending disturbance coordination method that can effectively improve edge customer throughput in interference coordination process is provided.
A kind of LTE system descending disturbance coordination method, comprises step:
Obtain the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Calculate the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Receive the RNTP list that adjacent cell sends, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and screen final high interference Physical Resource Block from described resultant interference instruction list;
Carry out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
Correspondingly, the present invention also provides a kind of LTE system descending interference coordination system, comprising:
Acquisition module, for obtaining the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Computing module, for calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Disturb indicating module, the RNTP list sending for receiving adjacent cell, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Screening module for each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and is screened final high interference Physical Resource Block from described resultant interference instruction list;
Interference coordination module, for carrying out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
The present invention is by calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power, then the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list calculating, again each interference instruction list is summed up, then therefrom filter out final high interference Physical Resource Block, in the final high interference Physical Resource Block Zhe of last foundation community, edge user and central user are carried out interference coordination.Because RNTP list only includes high interference mark and two kinds of values of low interference mark, cannot comprehensively weigh the difference of each adjacent cell Dui Zhe community disturbance degree.By calculating the adjacent area factor of corresponding this community of each adjacent cell, reflect exactly the annoyance level of adjacent cell Dui Zhe community, and the interference instruction list of calculating each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list, make different interference instruction lists because of different adjacent area factor differences, ensure follow-uply can accurately screen final high interference Physical Resource Block, avoid low interference Physical Resource Block to be mistaken for final high interference Physical Resource Block, in the process of interference coordination, ensured that edge customer has higher throughput.
In addition, the present invention also provides a kind of LTE base station, comprises LTE system descending interference coordination system, and described LTE downlink interference collaboration system comprises:
Acquisition module, for obtaining the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Computing module, for calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Disturb indicating module, the RNTP list sending for receiving adjacent cell, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Screening module for each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and is screened final high interference Physical Resource Block from described resultant interference instruction list;
Interference coordination module, for carrying out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
By described LTE system descending interference coordination system Dui Zhe community inward flange user and the interference coordination of central user, ensure that this Cell Edge User has higher throughput in the middle of the process of interference coordination.
[brief description of the drawings]
Fig. 1 is the flow chart of an embodiment of a kind of LTE system descending of the present invention disturbance coordination method;
Fig. 2 is a kind of LTE embodiment Zhe community of system descending disturbance coordination method of the present invention and adjacent cell position view;
Fig. 3 is the structured flowchart of an embodiment of a kind of LTE system descending of the present invention interference coordination system.
[embodiment]
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Refer to Fig. 1, it is the flow chart of an embodiment of a kind of LTE system descending of the present invention disturbance coordination method.
A kind of LTE system descending disturbance coordination method, comprises step:
S101: the first Reference Signal Received Power that obtains the adjacent cell that this cell base station measures;
First Reference Signal Received Power (RSRP, Reference Signal Receiving Power) of adjacent cell can be measured and preserve to this cell base station in the time of start.Base station in use also can not timing ground or periodically measure and upgrade the first Reference Signal Received Power of adjacent cell.As shown in Figure 2, it is a kind of LTE embodiment Zhe community of system descending disturbance coordination method of the present invention and adjacent cell position view.In Fig. 2, eNodeB0 comprises four adjacent cells, and this is not eNodeB1, eNodeB2, eNodeB3 and eNodeB4, wherein, and the RSRP of adjacent cell eNodeB1
01be 45, the RSRP of adjacent cell eNodeB2
02be 47, the RSRP of adjacent cell eNodeB3
03be 47, the RSRP of adjacent cell eNodeB4
04be 46.
S102: the adjacent area factor of calculating corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Described adjacent area factor ρ
ij=RSRP
ij/ max (RSRP
i), wherein, i is this cell number, j is adjacent cell numbering.For example, the adjacent area factor ρ of corresponding this community eNodeB0 of adjacent cell eNodeB1
01=45/max (45,46,47)=0.957, in like manner, calculates the adjacent area factor of corresponding this community of each adjacent cell, wherein, and the adjacent area factor ρ of corresponding this community eNodeB0 of adjacent cell eNodeB2 and adjacent cell eNodeB3
02=ρ
03=47/max (45,46,47)=1, the adjacent area factor ρ of corresponding this community eNodeB0 of adjacent cell eNodeB4
04=46/max (45,46,47)=0.979.
As can be seen here, because can there be difference each adjacent cell base station to the distance of this cell base station, and different adjacent cell is also different to the communication environments of the radiofrequency signal of this minizone, so the adjacent area factor of corresponding this community of each adjacent cell is also different.
S103: receive the RNTP list that adjacent cell sends, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Receive the RNTP list RNTP that adjacent cell sends
ij, wherein, i is this cell number, j is adjacent cell numbering.Then according to described adjacent area factor ρ
ijwith described RNTP list RNTP
ij, calculate the interference of each adjacent cell in current measurement period and indicate list RNTPi
j, new=ρ
ij* RNTP
ij, for example, the interference instruction list RNTP of adjacent cell eNodeB1
01, new=ρ
01* RNTP
01.
The RNTP list that adjacent cell sends only has high interference mark and two kinds of values of low interference mark, by RNTP list and the product of the corresponding adjacent area factor being calculated to the interference instruction list that obtains adjacent cell, make to disturb the impact that value in instruction list can the hard to bear adjacent area factor.
S104: each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and screen final high interference Physical Resource Block from described resultant interference instruction list;
Each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, be i.e. resultant interference instruction list
wherein, n is the number of adjacent cell.From formula, can find out, resultant interference instruction list is the mean value of each interference instruction list, reacts the average interference degree of each RB position.
After forming resultant interference instruction list, from described resultant interference instruction list, screen final high interference Physical Resource Block, can pass through respectively by the screening thresholding comparison of the value of each RB position and systemic presupposition, can think that the Physical Resource Block of this RB position correspondence is final high interference Physical Resource Block if be greater than screening thresholding, also can choose a certain proportion of Physical Resource Block as final high interference Physical Resource Block according to the value of RB position order from high to low.
S105: carry out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
The present invention is by calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power, then the interference instruction list of each adjacent cell in current measurement period is calculated in the described adjacent area factor and described RNTP list, again each interference instruction list is summed up, then therefrom filter out final high interference Physical Resource Block, in the final high interference Physical Resource Block Zhe of last foundation community, edge user and central user are carried out interference coordination.Because RNTP list only includes high interference mark and two kinds of values of low interference mark, cannot comprehensively weigh the difference of each adjacent cell Dui Zhe community disturbance degree.By calculating the adjacent area factor of corresponding this community of each adjacent cell, reflect exactly the annoyance level of adjacent cell Dui Zhe community, and the interference instruction list of calculating each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list, make different interference instruction lists because of different adjacent area factor differences, ensure follow-uply can accurately screen final high interference Physical Resource Block, avoid low interference Physical Resource Block to be mistaken for final high interference Physical Resource Block, in the process of interference coordination, ensured that edge customer has higher throughput.
In one embodiment, in above-mentioned steps S104, from resultant interference instruction list, screen the step in final high interference region, specifically comprise:
S201: respectively resultant interference is indicated the RB position in list to compare with the default thresholding of estimating, estimate thresholding if the value of RB position is greater than, the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block;
Respectively resultant interference is indicated the RB position in list to compare with the default thresholding of estimating, if being greater than, the value of RB position estimates thresholding, the serious interference of this corresponding Physical Resource Block in RB position to adjacent cell is described, now the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block.
S202: if the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, from estimate high interference Physical Resource Block, choose the Physical Resource Block of described candidate's ratio according to order from high to low, and be judged to be final high interference Physical Resource Block, otherwise, all high interference Physical Resource Block of estimating are judged to be to final high interference Physical Resource Block.
If the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, for example, this community all physics number of resource blocks amount is 100, and the number of estimating high interference Physical Resource Block is 20, the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is 20%, if default candidate's ratio is 15%, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block from candidate according to order from high to low, estimating high interference Physical Resource Block by 20 sorts according to the value of corresponding RB position, choose from high to low 15 and estimate high interference Physical Resource Block as final high interference Physical Resource Block.
If the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is less than or equal to default candidate's ratio, using all high interference Physical Resource Block of estimating as final high interference Physical Resource Block.
By choosing default candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, can avoid the problem that a large amount of Physical Resource Block cannot use in final interference coordination process, ensure the throughput of edge customer in final interference coordination process.
In one embodiment, above-mentioned steps S105 specifically can comprise step:
S301: the Physical Resource Block except described final high interference Physical Resource Block in all Physical Resource Block is set as to low interference Physical Resource Block;
Owing to normally first low interference physics resource block assignments being used to user in LTE system, so first judge the low interference Physical Resource Block in all Physical Resource Block, because only have final high interference physical resource just can adjacent cell be produced and be disturbed, so the Physical Resource Block except described final high interference Physical Resource Block all can be set as low interference Physical Resource Block.
S302: the Physical Resource Block of selecting system allocation proportion, as edge customer Resource Block, and uses this edge customer resource block assignments Gei Zhe community inward flange user from low interference Physical Resource Block;
Usually, because the quantity of low interference Physical Resource Block is the quantity that is greater than final high interference Physical Resource Block, if all low interference Physical Resource Block are all distributed to community inward flange user to be used, in community, central user will lack enough spendable Physical Resource Block so, therefore, need to be from low interference Physical Resource Block the Physical Resource Block of selecting system allocation proportion as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used.
Wherein, edge customer Resource Block can be selected to carry out based on the principle of equitable proportion for the method for salary distribution of edge customer.
S303: the Physical Resource Block except edge user resources piece in all Physical Resource Block is distributed to central user in this community and use.
Physical Resource Block by selecting system allocation proportion from low interference Physical Resource Block is as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used, avoid all low interference Physical Resource Block all to distribute to that community inward flange user uses and central user will lack enough problems of spendable Physical Resource Block, make can not affect the quantity of the shared Physical Resource Block of central user in community in the middle of the process of interference coordination, ensured communication quality and the throughput of central user.
In one embodiment, can, before above-mentioned steps S101, further, also comprise step:
S401: the user to this community of access issues the measurement configuration information based on A3 event or A5 event;
Wherein, described A3 event is that adjacent area is better than the side-play amount with respect to Serving cell.A5 event is, Serving cell is poorer than absolute thresholding lower limit, and adjacent area is better than absolute thresholding higher limit.Described measurement configuration information comprise A3 event or A5 event on call time and report number of times, preferably, described in to report set of time be periodic report, report number of times to be made as unlimited reporting.
S402: receive the reporting information of described user based on A3 event or A5 event, and preserve the second Reference Signal Received Power of reporting information Zhong Zhe community;
In the time there is A3 or A5 event, user initiatively sends reporting information to cell base station, wherein said reporting information comprises the second reference information received power of this community, and then this cell base station receives the reporting information of user based on A3 event or A5 event in described this community.
S403: the user who chooses preset ratio according to ascending order from the second Reference Signal Received Power is set as edge customer.
The second Reference Signal Received Power of reporting of user is sorted, and the user who then chooses preset ratio according to ascending order from the second Reference Signal Received Power is set as the edge customer of this community.
The user who chooses preset ratio by the order according to ascending from the second Reference Signal Received Power based on A3 event or A5 reporting events information is set as the edge customer of this community, make base station can implement to follow the tracks of the state of this community user, in the time that community user is edge customer, can identify as early as possible this user for edge customer.
Refer to Fig. 3, it is the structured flowchart of an embodiment of a kind of LTE system descending of the present invention interference coordination system.
Acquisition module 301, for obtaining the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Computing module 302, for calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Disturb indicating module 303, the RNTP list sending for receiving adjacent cell, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Screening module 304 for each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and is screened final high interference Physical Resource Block from described resultant interference instruction list;
Interference coordination module 305, for carrying out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
Each module of above-mentioned LTE system descending interference coordination system can realize corresponding steps and the flow process of above-mentioned LTE system descending disturbance coordination method, repeats no more herein.
Described the first Reference Signal Received Power that the present invention obtains according to acquisition module 301 by computing module 302 calculates the adjacent area factor of corresponding this community of each adjacent cell, then indicate list according to the described adjacent area factor and described RNTP list by the interference of disturbing indicating module 303 to calculate each adjacent cell in current measurement period, by screening module 304, each interference instruction list is summed up again, then therefrom filter out final high interference Physical Resource Block, finally carry out interference coordination by interference coordination module 305 according to edge user and central user in final high interference Physical Resource Block Zhe community.Because RNTP list only includes high interference mark and two kinds of values of low interference mark, cannot comprehensively weigh the difference of each adjacent cell Dui Zhe community disturbance degree.Calculate the adjacent area factor of corresponding this community of each adjacent cell by computing module 302, reflect exactly the annoyance level of adjacent cell Dui Zhe community, and by disturbing indicating module 303 to calculate the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list, make different interference instruction lists because of different adjacent area factor differences, ensure follow-uply can accurately screen final high interference Physical Resource Block, avoid low interference Physical Resource Block to be mistaken for final high interference Physical Resource Block, in the process of interference coordination, ensure that edge customer has higher throughput.
In one embodiment, above-mentioned screening module 304, preferably, comprises following submodule.
Estimate module, compare with the default thresholding of estimating for the RB position of respectively resultant interference being indicated to list, estimate thresholding if the value of RB position is greater than, the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block;
Estimating module indicates resultant interference respectively the RB position in list to compare with the default thresholding of estimating, if being greater than, the value of RB position estimates thresholding, the serious interference of this corresponding Physical Resource Block in RB position to adjacent cell is described, now estimates module the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block.
Determination module, if for the number of estimating high interference Physical Resource Block in the ratio of all Physical Resource Block higher than default candidate's ratio, from estimate high interference Physical Resource Block, choose the Physical Resource Block of described candidate's ratio according to order from high to low, and be judged to be final high interference Physical Resource Block, otherwise, all high interference Physical Resource Block of estimating are judged to be to final high interference Physical Resource Block.
If the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, for example, this community all physics number of resource blocks amount is 100, and the number of estimating high interference Physical Resource Block is 20, the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is 20%, if default candidate's ratio is 15%, determination module disturbs Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block from candidate according to order from high to low, estimating high interference Physical Resource Block by 20 sorts according to the value of corresponding RB position, choose from high to low 15 and estimate high interference Physical Resource Block as final high interference Physical Resource Block.
If the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is less than or equal to default candidate's ratio, determination module is using all high interference Physical Resource Block of estimating as final high interference Physical Resource Block.
Choose default candidate's ratio number Physical Resource Block as final high interference Physical Resource Block by determination module, can avoid the problem that a large amount of Physical Resource Block cannot use in final interference coordination process, ensure the throughput of edge customer in final interference coordination process.
In one embodiment, above-mentioned interference coordination module 305 specifically can comprise following submodule.
Setting module, for by all Physical Resource Block, the Physical Resource Block except described final high interference Physical Resource Block is set as low interference Physical Resource Block;
Owing to normally first low interference physics resource block assignments being used to user in LTE system, so so first judge the low interference Physical Resource Block in Physical Resource Block, because only have final high interference physical resource just can adjacent cell be produced and be disturbed, so the Physical Resource Block except described final high interference Physical Resource Block all can be set as low interference Physical Resource Block.
The first distribution module, for from the Physical Resource Block of low interference Physical Resource Block selecting system allocation proportion as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used;
Usually, because the quantity of low interference Physical Resource Block is the quantity that is greater than final high interference Physical Resource Block, if all low interference Physical Resource Block are all distributed to community inward flange user to be used, in community, central user will lack enough spendable Physical Resource Block so, therefore, need to be from low interference Physical Resource Block the Physical Resource Block of selecting system allocation proportion as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used.
Wherein, edge customer Resource Block can be selected to carry out based on the principle of equitable proportion for the method for salary distribution of edge customer.
The second distribution module, for by all Physical Resource Block the Physical Resource Block except edge user resources piece distribute in this community central user and use.
Physical Resource Block by the first distribution module selecting system allocation proportion from low interference Physical Resource Block is as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used, avoid all low interference Physical Resource Block all to distribute to that community inward flange user uses and central user will lack enough problems of spendable Physical Resource Block, make can not affect the quantity of the shared Physical Resource Block of central user in community in the middle of the process of interference coordination, ensured communication quality and the throughput of central user.
In one embodiment, can, before above-mentioned steps S101, further, also comprise step:
Issue module, for issuing the measurement configuration information based on A3 event or A5 event to the user of this community of access;
Wherein, described A3 event is that adjacent area is better than the side-play amount with respect to Serving cell.A5 event is, Serving cell is poorer than absolute thresholding lower limit, and adjacent area is better than absolute thresholding higher limit.Described measurement configuration information comprise A3 event or A5 event on call time and report number of times, preferably, described in to report set of time be periodic report, report number of times to be made as unlimited reporting.
Receiver module, for receiving the reporting information of user based on A3 event or A5 event in described this community, and preserves the second Reference Signal Received Power of reporting information Zhong Zhe community;
In the time there is A3 or A5 event, user initiatively sends reporting information to cell base station, wherein said reporting information comprises the second reference information received power of this community, and then this cell base station receives the reporting information of user based on A3 event or A5 event in described this community by receiver module.
Choose module, the user who chooses preset ratio from the second Reference Signal Received Power for the order according to ascending is set as the edge customer of this community.
Choose module the second Reference Signal Received Power of reporting of user is sorted, the user who then chooses preset ratio according to ascending order from the second Reference Signal Received Power is set as the edge customer of this community.
The user who chooses preset ratio by choosing module according to ascending order from the second Reference Signal Received Power based on A3 event or A5 reporting events information is set as the edge customer of this community, make base station can implement to follow the tracks of the state of this community user, in the time that community user is edge customer, can identify as early as possible this user for edge customer.
A kind of LTE base station, comprises the LTE system descending interference coordination system described in above-mentioned any one embodiment.
By described LTE system descending interference coordination system Dui Zhe community inward flange user and the interference coordination of central user, ensure that this Cell Edge User has higher throughput in the middle of the process of interference coordination.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a LTE system descending disturbance coordination method, is characterized in that, comprises step:
Obtain the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Calculate the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Receive the RNTP list that adjacent cell sends, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and screen final high interference Physical Resource Block from described resultant interference instruction list;
Carry out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
2. LTE system descending disturbance coordination method according to claim 1, is characterized in that, described step of screening final high interference region from resultant interference instruction list, specifically comprises:
Respectively resultant interference is indicated the RB position in list to compare with the default thresholding of estimating, estimate thresholding if the value of RB position is greater than, the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block;
If the ratio of the number of estimating high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, from estimate high interference Physical Resource Block, choose the Physical Resource Block of described candidate's ratio according to order from high to low, and be judged to be final high interference Physical Resource Block, otherwise, all high interference Physical Resource Block of estimating are judged to be to final high interference Physical Resource Block.
3. LTE system descending disturbance coordination method according to claim 1, is characterized in that, the described final high interference Physical Resource Block Dui Zhe community inward flange user of described foundation and central user are carried out the step of interference coordination, specifically comprise:
Physical Resource Block except described final high interference Physical Resource Block in all Physical Resource Block is set as to low interference Physical Resource Block;
From low interference Physical Resource Block, the Physical Resource Block of selecting system allocation proportion is as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used;
Physical Resource Block except edge user resources piece in all Physical Resource Block is distributed to central user in this community to be used.
4. LTE system descending disturbance coordination method according to claim 1, is characterized in that, before described the first Reference Signal Received Power step of obtaining the adjacent cell that this cell base station measures, also comprises step:
User to this community of access issues the measurement configuration information based on A3 event or A5 event;
Receive the reporting information of described user based on A3 event or A5 event, and preserve the second Reference Signal Received Power of reporting information Zhong Zhe community;
The user who chooses preset ratio according to ascending order from the second Reference Signal Received Power is set as edge customer.
5. a LTE system descending interference coordination system, is characterized in that, comprising:
Acquisition module, for obtaining the first Reference Signal Received Power of the adjacent cell that this cell base station measures;
Computing module, for calculating the adjacent area factor of corresponding this community of each adjacent cell according to described the first Reference Signal Received Power;
Disturb indicating module, the RNTP list sending for receiving adjacent cell, and obtain the interference instruction list of each adjacent cell in current measurement period according to the described adjacent area factor and described RNTP list;
Screening module for each RB position of the interference instruction list of each adjacent cell is summed up and forms resultant interference instruction list, and is screened final high interference Physical Resource Block from described resultant interference instruction list;
Interference coordination module, for carrying out interference coordination according to described final high interference Physical Resource Block Dui Zhe community inward flange user and central user.
6. LTE system descending interference coordination system according to claim 5, is characterized in that, described screening module specifically comprises:
Estimate module, compare with the default thresholding of estimating for the RB position of respectively resultant interference being indicated to list, estimate thresholding if the value of RB position is greater than, the corresponding Physical Resource Block in described RB position is judged to be to estimate high interference Physical Resource Block;
Determination module, if for the number of estimating high interference Physical Resource Block in the ratio of all Physical Resource Block higher than default candidate's ratio, from estimate high interference Physical Resource Block, choose the Physical Resource Block of described candidate's ratio according to order from high to low, and be judged to be final high interference Physical Resource Block, otherwise, all high interference Physical Resource Block of estimating are judged to be to final high interference Physical Resource Block.
7. LTE system descending interference coordination system according to claim 5, is characterized in that, described interference coordination module specifically comprises:
Setting module, for by all Physical Resource Block, the Physical Resource Block except described final high interference Physical Resource Block is set as low interference Physical Resource Block;
The first distribution module, for from the Physical Resource Block of the default allocation proportion of low interference Physical Resource Block selecting system as edge customer Resource Block, and this edge customer resource block assignments Gei Zhe community inward flange user is used;
The second distribution module, for by all Physical Resource Block the Physical Resource Block except edge user resources piece distribute in this community central user and use.
8. LTE system descending interference coordination system according to claim 5, is characterized in that, before described the first Reference Signal Received Power step of obtaining the adjacent cell that this cell base station measures, also comprises further step:
Issue module, for issuing the measurement configuration information based on A3 event or A5 event to the user of this community of access;
Receive and preserve module, for receiving the reporting information of described user based on A3 event or A5 event, and preserve the second Reference Signal Received Power of reporting information Zhong Zhe community;
Choose module, the user who chooses preset ratio from the second Reference Signal Received Power for the order according to ascending is set as edge customer.
9. a LTE base station, is characterized in that, comprises the LTE system descending interference coordination system as described in claim 5 to 8 any one.
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