CN104185212A - Method and system for uplink interference coordination of long term evolution (LTE) system - Google Patents
Method and system for uplink interference coordination of long term evolution (LTE) system Download PDFInfo
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- CN104185212A CN104185212A CN201410401644.1A CN201410401644A CN104185212A CN 104185212 A CN104185212 A CN 104185212A CN 201410401644 A CN201410401644 A CN 201410401644A CN 104185212 A CN104185212 A CN 104185212A
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Abstract
The invention discloses a method and system for uplink interference coordination of a long term evolution (LTE) system. According to the method, for each target neighbor cell, by calculating neighbor cell factors of each edge user corresponding to the target neighbor cell, corresponding high interference indicator (HII) lists can be generated according to different neighbor cells without maintaining edge user set lists, the use of a base station memory is reduced, and the base station configuration cost is reduced. In addition, average transmitted power and predicted transmitted power of each physical resource block in the current statistics period are calculated according to the neighbor cell factors, the predicted transmitted power is compared with a preset power threshold to generate the HII lists, the problem of HII inaccuracy caused by the HII lists generated by purely calculating the physical resource blocks used by edge users in the prior art is solved, and accuracy of the generated HII lists is guaranteed.
Description
[technical field]
The present invention relates to mobile communication technology field, particularly relate to uplink interference coordination approach and system between a kind of LET system cell.
[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 other edge customers that uses community, the especially community of 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 the orthogonalized a kind of interference coordination technique of edge customer frequency range used.
For up, LTE standard provides HII (High Interference Indicator, high interference indication) and OI (Overload Indicator, overload indication) parameter to be used for supporting dynamic interference coordination.Wherein HII is a kind of prediction to high interference in future region, and the cycle minimum of renewal is 20ms, and by corresponding RB, (Resource Bloc: bit mapping Resource Block) is realized, for example, represents high interference with " 1 ", with " 0 ", represents low interference.
At existing use HII, carry out in the technology of uplink interference coordination, normally edge user carries out further dividing in detail, differentiation is for the edge customer collection of different adjacent areas, then in a measurement period, the RB position of using according to each adjacent area edge customer collection separately, generation is for the HII list information of each adjacent area, and HII information is separately received in each adjacent area, then carries out interference coordination; In prior art, the list of a plurality of edge customer collection need to be safeguarded in each base station, need a large amount of memory headrooms, make BTS hardware configuration high, in addition, the HII information that the RB position of merely using by statistics edge customer generates, owing to lacking enough Rule of judgment, easily causes HII information inaccurate.
[summary of the invention]
Based on this, being necessary, for safeguarding in prior art that a plurality of edge customer collection lists need a large amount of memory headroom and the inaccurate problem of HII information, provides uplink interference coordination approach and system between the LET system cell that the few HII information accuracy of a kind of committed memory resource is high.
A uplink interference coordination approach between LET system cell, comprises step:
Obtain the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
For each target adjacent area, according to described the first Reference Signal Received Power, calculate each edge customer to the adjacent area factor that should target adjacent area;
According to described uplink transmission power and the described adjacent area factor, calculate the average transmit power of each Physical Resource Block in current measurement period, and obtain prediction transmitting power according to described average transmit power; According to prediction transmitting power, generate a HII list corresponding with target adjacent area, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
According to a HII list, interference coordination is carried out in system cell.
Correspondingly, the present invention also provides uplink interference coherent system between a kind of LTE system cell, comprises;
The first acquisition module, for obtaining the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
Computing module, for for each target adjacent area, calculates each edge customer to the adjacent area factor that should target adjacent area according to described the first Reference Signal Received Power;
Prediction module, for calculating the average transmit power of each Physical Resource Block in current measurement period according to described uplink transmission power and the described adjacent area factor, and obtains prediction transmitting power according to described average transmit power;
List generation module, for generating a HII list corresponding with target adjacent area according to prediction transmitting power, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
Coordination module, for carrying out interference coordination according to a HII list to system cell.
First the present invention obtains the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area, and for each target adjacent area, calculates each edge customer to the adjacent area factor that should target adjacent area; And then calculate the average transmit power of each Physical Resource Block in current measurement period and predict transmitting power; Afterwards, according to prediction transmitting power, generate a HII list corresponding with target adjacent area; Finally, according to a HII list, interference coordination is carried out in system cell.For each target adjacent area, by calculating each edge customer to the adjacent area factor that should target adjacent area, the list of Maintenance free edge customer collection can be realized for different adjacent areas and generate corresponding HII list, reduce the use of base station internal memory and reduced the cost that base station configures, additionally, according to the adjacent area factor, calculate average transmit power and the prediction transmitting power of each Physical Resource Block in current measurement period, and by predicting that transmitting power and the contrast of default power threshold generate HII list, having avoided merely adding up in prior art Physical Resource Block that edge customer uses generates HII list and causes the inaccurate problem of HII, guaranteed the accuracy of the HII list of generation.
[accompanying drawing explanation]
Fig. 1 is the flow chart of an embodiment of uplink interference coordination approach between a kind of LTE of the present invention system cell;
Fig. 2 is the edge customer schematic diagram of an embodiment of uplink interference coordination approach between a kind of LTE of the present invention system cell;
Fig. 3 is the structured flowchart of an embodiment of uplink interference coherent system between a kind of LTE of the present invention system cell.
[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 uplink interference coordination approach between a kind of LTE of the present invention system cell.
A uplink interference coordination approach between LTE system cell, comprises step:
S101: obtain the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
Described uplink transmission power comprises the uplink transmission power of each subframe in current measurement period, usually, for LET system, every 1ms that is scheduling to of Physical Resource Block dispatches once, each scheduling meeting forms different subframes, and measurement period minimum is 20ms, the uplink transmission power that obtains this Cell Edge User comprises the uplink transmission power of at least one subframe.
Scheduling edge customer is periodically to first Reference Signal Received Power (RSRP) of cell base station active reporting target adjacent area, as shown in Figure 2, it is the edge customer schematic diagram of an embodiment of uplink interference coordination approach between a kind of LTE of the present invention system cell.Three edge customer UE1, UE2 in Fig. 2 under eNodeB0 and UE3, the RSRP of the target adjacent area eNodeB1 that UE1 reports
11be 45; The RSRP of the target adjacent area eNodeB2 that UE2 reports
22be 47; UE3 target adjacent area has two, wherein the RSRP of eNodeB1
13be the RSRP of 44, eNodeB2
23be 45.
S102: for each target adjacent area, calculate each edge customer to the adjacent area factor that should target adjacent area according to described the first Reference Signal Received Power;
Wherein, described adjacent area factor ρ
i,j=RSRP
ij/ max (RSRP
i), i is adjacent area numbering, j is terminal number.For example, for target adjacent area eNodeB1, the adjacent area factor ρ of UE1
11=45max (45,43)=1, the adjacent area factor ρ of UE2
12=0max (44,45)=0, the adjacent area factor ρ of UE3
13=44max (44,45)=0.978; From above-mentioned result of calculation, can find out, the target adjacent area of UE2 is not eNodeB1, so for eNodeB1, the adjacent area factor ρ of UE2
12be 0.
The like, calculating for each target adjacent area, each edge customer is to the adjacent area factor that should target adjacent area.
S103: calculate the average transmit power of each Physical Resource Block in current measurement period according to described uplink transmission power and the described adjacent area factor, and obtain prediction transmitting power according to described average transmit power;
Wherein, the average transmit power of each Physical Resource Block (PRB:Physical Resource Block) in current measurement period
wherein, k is physical resource block number, and n is the physical resource block dispatching number of times in current measurement period, P
mbe the uplink transmission power of m subframe, ρ
mbe in m subframe K corresponding edge user of PRB institute for the adjacent area factor of this target adjacent area.
Calculate and obtain after the average transmit power of each Physical Resource Block in current measurement period, described average transmit power is carried out to filtering processing, obtain prediction transmitting power, particularly, described prediction transmitting power P
pRBk=α P
pRBk, now+ (1-α) P
pRBk, pass, P wherein
pRBk, passfor the prediction transmitting power of upper this Physical Resource Block of measurement period, if calculate first transmitting power, there is no last statistics, P
pRBk=P
pRBk, now, α wherein preferably gets 0.875.
S104: generate a HII list corresponding with target adjacent area according to prediction transmitting power, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
HII list comprises two kinds of signs, one is that one of high interference sign is low interference sign, in the present embodiment, when described prediction transmitting power is greater than default power threshold, can think that this Physical Resource Block is high interference, now the RB sign that in a HII list of Serving cell, this PRB is corresponding is set to high interference, otherwise, can think that this Physical Resource Block is low interference, and the RB sign that in a described HII list, this PRB is corresponding is set to low interference.
S105: interference coordination is carried out in system cell according to a HII list.
First the present invention obtains the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area, and for each target adjacent area, according to described the first Reference Signal Received Power, calculate each edge customer to the adjacent area factor that should target adjacent area; And then calculate the average transmit power of each Physical Resource Block in current measurement period according to described uplink transmission power and the described adjacent area factor, and obtain prediction transmitting power according to described average emitted merit; Afterwards, according to prediction transmitting power, generate a HII list corresponding with target adjacent area, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold; Finally, according to a HII list, interference coordination is carried out in system cell.For each target adjacent area, by calculating each edge customer to the adjacent area factor that should target adjacent area, the list of Maintenance free edge customer collection can be realized for different adjacent areas and generate corresponding HII list, reduce the use of base station internal memory and reduced the cost that base station configures, additionally, according to the adjacent area factor, calculate average transmit power and the prediction transmitting power of each Physical Resource Block in current measurement period, and by predicting that transmitting power and the contrast of default power threshold generate HII list, having avoided merely adding up in prior art Physical Resource Block that edge customer uses generates HII list and causes the inaccurate problem of HII, guaranteed the accuracy of the HII list of generation.
In one embodiment, can, before above-mentioned steps S101, further, also comprise step:
S201: screen the edge customer that coordinate for inter-cell uplink interference this community according to signal received power.
The signal that receives user's transmitting in community, screens according to signal received power the edge customer that coordinate for inter-cell uplink interference this community, if signal received power is less than default power threshold, can think that this user is for edge customer.
By signal received power, filter out the edge customer that coordinate for inter-cell uplink interference this community, contribute to filter out real edge customer, make the HII list information of follow-up generation more accurate.
Preferably, above-mentioned steps S201 can realize by following steps:
S301: the user to this community of access issues the measurement configuration information based on A3 event or A5 event;
Wherein, the described A3 time 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.
S302: receive the reporting information of user based on A3 event or A5 event in described this community, and preserve the second Reference Signal Received Power of reporting information Zhong Zhe community;
When 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.
S303: the user who chooses preset ratio according to ascending order from the second Reference Signal Received Power is set as the edge customer of this community.
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, when community user is edge customer, can identify as early as possible this user for edge customer, guarantee the accuracy of follow-up generation HII list.
In one embodiment, above-mentioned steps S105 specifically can comprise step:
S401: send to this target adjacent area to carry out interference coordination a described HII list;
After generating a HII list, a described HII list is sent to this target adjacent area, make target adjacent area to the Physical Resource Block in target adjacent area, to carry out interference coordination according to a described HII list.
S402: receive the 2nd HII list that adjacent area generates for this community, carry out interference coordination according to the edge customer in the 2nd HII list Dui Zhe community receiving.
Receive the 2nd HII list that adjacent area generates for this community, the generation method of wherein said the 2nd HII list is identical with a HII list.The Physical Resource Block that this cell base station is used according to the edge customer in the 2nd HII list Dui Zhe community receiving carries out interference coordination.
Preferentially, above-mentioned steps S402, specifically can comprise step:
S501: each the RB position in the 2nd HII list of all receptions is summed up, if the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block;
Therefore because there are a plurality of adjacent areas this community, the 2nd received HII list has a plurality ofly, each the RB position in the 2nd HII list of all receptions is summed up, therefrom to determine high interference Physical Resource Block.If the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block.
S502: if the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, otherwise, using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block;
If the ratio of the number of candidate's 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 candidate's high interference Physical Resource Block is 20, the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is 20%, if default candidate's ratio is 15%, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, the value that is about to 20 candidate's high interference Physical Resource Block and according to corresponding RB is sorts, choose from high to low 15 candidate's high interference Physical Resource Block as final high interference Physical Resource Block.
If the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is less than or equal to default candidate's ratio, using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block.
S503: carry out interference coordination according to the edge customer in described final high interference Physical Resource Block Dui Zhe community.
According to described final high interference Physical Resource Block, minimizing edge customer takies final high interference Physical Resource Block, with the edge customer of realizing in Dui Zhe community, carries out interference coordination.
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 be used in final scheduling process, when guaranteeing interference coordination effect, reduce the complexity of interference coordination.
Refer to Fig. 3, it is the structured flowchart of an embodiment of uplink interference coherent system between a kind of LTE of the present invention system cell.
The first acquisition module 401, for obtaining the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
Computing module 402, for for each target adjacent area, calculates each edge customer to the adjacent area factor that should target adjacent area according to described the first Reference Signal Received Power;
Prediction module 403, for calculating the average transmit power of each Physical Resource Block in current measurement period according to described uplink transmission power and the described adjacent area factor, and obtains prediction transmitting power according to described average transmit power;
List generation module 404, for generating a HII list corresponding with target adjacent area according to prediction transmitting power, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
Interference coordination module 405, for carrying out interference coordination according to a HII list to system cell.
Between above-mentioned LTE system cell, each module of uplink interference coherent system can realize corresponding steps and the flow process of uplink interference coordination approach between above-mentioned LTE system cell, repeats no more herein.
First the present invention obtains the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area by the first acquisition module 401, and by computing module 402 for each target adjacent area, according to described the first Reference Signal Received Power, calculate each edge customer to the adjacent area factor that should target adjacent area; And then according to described uplink transmission power and the described adjacent area factor, calculate the average transmit power of each Physical Resource Block in current measurement period by prediction module 403, and obtain prediction transmitting power according to described average emitted merit; Afterwards, by list generation module 404, according to prediction transmitting power, generate a HII list corresponding with target adjacent area, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold; Finally, by interference coordination module 405, according to a HII list, interference coordination is carried out in system cell.For each target adjacent area, by computing module 402, calculate each edge customer to the adjacent area factor that should target adjacent area, the list of Maintenance free edge customer collection can be realized for different adjacent areas and generate corresponding HII list, reduce the use of base station internal memory and reduced the cost that base station configures, additionally, according to the adjacent area factor, calculate average transmit power and the prediction transmitting power of each Physical Resource Block in current measurement period, and will predict that by prediction module 403 transmitting power and the contrast of default power threshold generate HII list, having avoided merely adding up in prior art Physical Resource Block that edge customer uses generates HII list and causes the inaccurate problem of HII, guaranteed the accuracy of the HII list of generation.
In one embodiment, between LTE system cell, uplink interference coherent system can also comprise with lower module:
Screening module, the edge customer of coordinating for inter-cell uplink interference for screen this community according to signal received power.
The signal that receives user's transmitting in community by screening module, screens according to signal received power the edge customer that coordinate for inter-cell uplink interference this community, if signal received power is greater than default power threshold, can think that this user is for edge customer.
Screening module filters out by signal received power the edge customer that coordinate for inter-cell uplink interference this community, contributes to filter out real edge customer, makes the HII list information of follow-up generation more accurate.
Preferably, above-mentioned screening module comprises following submodule.
Issue module, for the user to this community of access, issue 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.
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;
When 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.
Setting 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.
Setting module sorts the second Reference Signal Received Power of reporting of user, 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 setting 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, when community user is edge customer, can identify as early as possible this user for edge customer, guarantee the accuracy of follow-up generation HII list.
In one embodiment, above-mentioned interference coordination module 405 can specifically comprise:
Sending module, for sending to this target adjacent area to carry out interference coordination a described HII list;
After generating a HII list, sending module sends to this target adjacent area by a described HII list, makes target adjacent area to the Physical Resource Block in target adjacent area, to carry out interference coordination according to a described HII list.
Receive Coordination module, the 2nd HII list generating for this community for receiving adjacent area, carries out interference coordination according to the edge customer in the 2nd HII list Dui Zhe community receiving.
Receive Coordination module and receive the 2nd HII list that adjacent area generates for this community, the generation method of wherein said the 2nd HII list is identical with a HII list.The Physical Resource Block that this cell base station is used by the edge customer receiving in Coordination module basis the 2nd HII list Dui Zhe community receiving carries out interference coordination.
Preferentially, above-mentioned reception Coordination module, specifically comprises following submodule:
Add and module, for each RB position of the 2nd HII list of all receptions is summed up, if the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block;
Therefore because there are a plurality of adjacent areas this community, the 2nd received HII list has a plurality ofly, by adding with module, each the RB position in the 2nd HII list of all receptions is summed up, therefrom to determine high interference Physical Resource Block.If the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block.
Setting module, if for the number of candidate's high interference Physical Resource Block in the ratio of all Physical Resource Block higher than default candidate's ratio, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, otherwise, using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block;
If the ratio of the number of candidate's 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 candidate's high interference Physical Resource Block is 20, the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is 20% so, if default candidate's ratio is 15%, by setting module, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, the value that is about to 20 candidate's high interference Physical Resource Block and according to corresponding RB is sorts, choose from high to low 15 candidate's high interference Physical Resource Block as final high interference Physical Resource Block.
If the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is less than or equal to default candidate's ratio, setting module is using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block.
Coordination module, for carrying out interference coordination according to the edge customer in described final high interference Physical Resource Block Dui Zhe community.
Coordination module is according to described final high interference Physical Resource Block, and minimizing edge customer takies final high interference Physical Resource Block, with the edge customer of realizing in Dui Zhe community, carries out interference coordination.
By setting module, choose default candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, can avoid in final scheduling process, the problem that a large amount of Physical Resource Block cannot be used reduces the complexity of interference coordination when guaranteeing interference coordination effect.
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 (10)
1. a uplink interference coordination approach between LTE system cell, is characterized in that, comprises the steps:
Obtain the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
For each target adjacent area, according to described the first Reference Signal Received Power, calculate each edge customer to the adjacent area factor that should target adjacent area;
According to described uplink transmission power and the described adjacent area factor, calculate the average transmit power of each Physical Resource Block in current measurement period, and obtain prediction transmitting power according to described average transmit power;
According to prediction transmitting power, generate a HII list corresponding with target adjacent area, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
According to a HII list, interference coordination is carried out in system cell.
2. uplink interference coordination approach between LTE according to claim 1 system cell, it is characterized in that, described obtain the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power step that edge customer reports target adjacent area before, comprise further step:
According to signal received power, screen the edge customer that coordinate for inter-cell uplink interference this community.
3. uplink interference coordination approach between LTE according to claim 2 system cell, is characterized in that, the edge customer step of this community of described screening, specifically comprises:
User to this community of access issues the measurement configuration information based on A3 event or A5 event;
Receive the reporting information of user based on A3 event or A5 event in described this community, 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 the edge customer of this community.
4. uplink interference coordination approach between LTE according to claim 1 system cell, is characterized in that, describedly according to a HII list, system cell is carried out to the step of interference coordination, specifically comprises:
Send to this target adjacent area to carry out interference coordination a described HII list;
Receive the 2nd HII list that adjacent area generates for this community, according to the edge customer in the 2nd HII list Dui Zhe community receiving, carry out interference coordination.
5. uplink interference coordination approach between LTE according to claim 4 system cell, is characterized in that, the edge customer in the 2nd HII list Dui Zhe community that described basis receives carries out the step of interference coordination, specifically comprises:
Each RB position in the 2nd HII list of all receptions is summed up, if the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block;
If the ratio of the number of candidate's high interference Physical Resource Block in all Physical Resource Block is higher than default candidate's ratio, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, otherwise, using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block;
According to the edge customer in described final high interference Physical Resource Block Dui Zhe community, carry out interference coordination.
6. a uplink interference coherent system between LTE system cell, is characterized in that, comprising:
The first acquisition module, for obtaining the uplink transmission power of this Cell Edge User and the first Reference Signal Received Power that edge customer reports target adjacent area;
Computing module, for for each target adjacent area, calculates each edge customer to the adjacent area factor that should target adjacent area according to described the first Reference Signal Received Power;
Prediction module, for calculating the average transmit power of each Physical Resource Block in current measurement period according to described uplink transmission power and the described adjacent area factor, and obtains prediction transmitting power according to described average transmit power;
List generation module, for generating a HII list corresponding with target adjacent area according to prediction transmitting power, wherein, described HII list is included in the high interference sign that prediction transmitting power is greater than the corresponding RB of Physical Resource Block position while presetting power threshold, the low interference sign of Physical Resource Block correspondence RB position when prediction transmitting power is less than or equal to default power threshold;
Interference coordination module, for carrying out interference coordination according to a HII list to system cell.
7. uplink interference coherent system between LTE according to claim 6 system cell, is characterized in that, also comprises:
Screening module, the edge customer of coordinating for inter-cell uplink interference for screen this community according to signal received power.
8. uplink interference coherent system between LTE according to claim 7 system cell, is characterized in that, described screening module specifically comprises:
Issue module, for the user to this community of access, issue the measurement configuration information based on A3 event or A5 event;
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;
Setting module, the user who chooses preset ratio from the second Reference Signal Received Power for the order according to ascending is set as this Cell Edge User.
9. uplink interference coherent system between LTE according to claim 6 system cell, is characterized in that, described interference coordination module specifically comprises:
Sending module, for sending to this target adjacent area to carry out interference coordination a described HII list;
Receive Coordination module, the 2nd HII list generating for this community for receiving adjacent area, carries out interference coordination according to the edge customer in the 2nd HII list Dui Zhe community receiving.
10. uplink interference coherent system between LTE according to claim 9 system cell, is characterized in that, described reception Coordination module specifically comprises:
Add and module, for each RB position of the 2nd HII list of all receptions is summed up, if the value of certain RB position is greater than default candidate's threshold value, this corresponding Physical Resource Block in RB position is judged to be to candidate's high interference Physical Resource Block;
Setting module, if for the number of candidate's high interference Physical Resource Block in the ratio of all Physical Resource Block higher than default candidate's ratio, according to order from high to low, from candidate, disturb Physical Resource Block by choosing candidate's ratio number Physical Resource Block as final high interference Physical Resource Block, otherwise, using all candidate's high interference Physical Resource Block as final high interference Physical Resource Block;
Coordination module, for carrying out interference coordination according to the edge customer in described final high interference Physical Resource Block Dui Zhe community.
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