CN102413477A - Simulation method for inter-cell interference coordination, and device therefor - Google Patents
Simulation method for inter-cell interference coordination, and device therefor Download PDFInfo
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- CN102413477A CN102413477A CN2010102886038A CN201010288603A CN102413477A CN 102413477 A CN102413477 A CN 102413477A CN 2010102886038 A CN2010102886038 A CN 2010102886038A CN 201010288603 A CN201010288603 A CN 201010288603A CN 102413477 A CN102413477 A CN 102413477A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
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Abstract
The invention discloses a simulation method for inter-cell interference coordination, and a device for the inter-cell interference coordination. The method comprises the steps of: confirming user equipment belonging to a cell-center user class and user equipment belonging to a cell-edge user class; confirming a neighboring cell which has inter-cell interference coordination interaction with the cell; according to a high-interference indication preset value, overload indication and the information of the neighboring cell, confirming the priority of physical resource blocks of all user equipment which take part in the inter-cell interference coordination; according to the priority of the physical resource blocks, carrying out scheduling of resources and then controlling the power; and according to the scheduling condition, setting the actual high-interference indication and overload indication of the cell, and noticing the neighboring cell. The method and the device disclosed by the invention can be used for simulating and realizing upstream semi-static inter-cell interference coordination technology in a static planning simulation platform which is not capable of simulating information interaction of an X2 interface.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of analogy method of Inter-Cell Interference Coordination and equipment.
Background technology
From technical standpoint: presence of intercell interference can be subdued with three types of technology as the main interference source the future mobile communication system at present: interference randomization, disturb cancellation and interference coordination.Though interference randomization with the mode albefaction of randomize interference signal interference, the inreal system interference that reduces, it is limited that the signal to noise ratio of therefore bringing is improved degree.Disturb the cancellation technology to suppress to disturb, but complexity is high and can only eliminate some strong jammings, so effect is limited with processing gain.Interference coordination technique can be used through the resource of minizone coordinated mode restriction edge customer, as much as possible or guarantee the frequency resource quadrature that uses between neighbor cell, or reduces through adjustment power and to disturb.It is realized simply, effect is obvious, thereby is regarded as the mainstream technology that reduces presence of intercell interference.
From network planning platform; Because LTE (Long Term Evolution; Long Term Evolution) and the difference between other communication standards; Existing many planning platforms can not directly be in use in the LTE system, and have not also related to the realization of this crucial new technology of LTE ICIC (Inter-Cell Interference Coordinate, Inter-Cell Interference Coordination) in the existing planning platform.In addition, compare static ICIC scheme, though semi-static scheme algorithm is complicated, need accomplishes according to the mutual information of X2 interface and coordinate, its realization is more flexible, also more is applicable to actual dynamic environment.Therefore, with LTE ICIC technology, especially semi-static ICIC scheme applies to in the network planning software of LTE system, and the idea of analogue simulation network condition has just been arisen at the historic moment.
The deficiency of prior art is: existing ICIC technology major side overweights the research of dynamic simulation platform or the realization of existing network product.Its platform or network environment are dynamic, and can realize the information interaction of S1, X2 interface, meet the realization demand of semi-static ICIC scheme.And network planning Optimization Software itself is exactly to the abstract of network environment and simulation, as a kind of STATIC SIMULATION platform, can not simulate the information interaction of X2 interface.
Summary of the invention
The present invention provides a kind of analogy method and equipment of Inter-Cell Interference Coordination, in order to the up ICIC among the simulation LTE in static environment.
The analogy method of a kind of ICIC is provided in the embodiment of the invention, has comprised the steps:
Confirm to belong to the UE and the UE that belongs to the edge customer class of central user class;
Confirm to carry out the mutual adjacent area of ICIC with local area;
Confirm the PRB priority of each UE of participation ICIC according to HII preset value, OI and neighboring BS information;
Carry out carrying out power control after the scheduling of resource according to the priority of PRB;
According to the scheduling situation actual HII of local area and OI are set, and inform the adjacent area.
The analog machine of a kind of ICIC is provided in the embodiment of the invention, has comprised:
User's determination module is used to the UE that confirms to belong to the UE of central user class and belong to the edge customer class;
The adjacent area determination module is used for confirming to carry out the mutual adjacent area of ICIC with local area;
The priority determination module is used for the PRB priority according to each UE of the definite ICIC of participation of HII preset value, OI and neighboring BS information;
Scheduling and power control module are used for carrying out carrying out power control after the scheduling of resource according to the priority of PRB;
Notification module is used for according to the scheduling situation actual HII of local area and OI being set, and informs the adjacent area.
Beneficial effect of the present invention is following:
The present invention at first confirms the PRB priority of each UE of participation ICIC according to HII preset value, OI and neighboring BS information in implementation process; , local area carries out power control then after carrying out scheduling of resource according to the priority of PRB; Actual HII of local area and OI are being set according to the scheduling situation, and are informing the adjacent area.In this process; The actual resource that adopts all can be confirmed according to the situation and its other resources situation of adjacent area in each sub-district; And each adjacent area is provided with the resource situation of self actual use; Supply each adjacent area to carry out the resource setting, though, also realized the ICIC process of individual minizone not from the information of X2 interface; Therefore the technical scheme that also makes the embodiment of the invention provide can be in can't simulating the static programming emulation platform of X2 interface information interaction, simulation and realization uplink semi-persistent ICIC technology.
The technical scheme that the embodiment of the invention provides can be in static environment (or condition of various no interface messages) analog IC IC; Simulation real network situation makes up model; Through to the parameter adjustment under the different scenes; Seek the preferred plan that ICIC realizes, for the scheme selection of ICIC in reality realizes with the ICIC relevant parameter setting provide can be with reference to foundation; Confirm simultaneously in real network, to consider the later each item network planning parameter of semi-static ICIC, like up transmitting power or the like.
Description of drawings
Fig. 1 is the analogy method implementing procedure sketch map of ICIC in the embodiment of the invention;
Fig. 2 is the ICIC implementing procedure sketch map of all sub-districts in the embodiment of the invention;
Fig. 3 is the analog machine structural representation of ICIC in the embodiment of the invention.
Embodiment
3GPP (3rd Generation partnership project; 3 generation collaborative project) the LTE system uplink channel adopted the technology based on the SC-FDMA of OFDM (OFDM) transmission technology (Single Carrier-Frequency Division Multiple Access, single-carrier frequency division multiple access).This technology can guarantee that system utilizes the orthogonality of subcarrier, evades the interference between each user in the sub-district.Because the LTE system has adopted the identical networking mode under the limited frequency condition, the overlapping situation of minizone component frequency resource will be inevitable.Therefore presence of intercell interference is considered to the main interference source of LTE system.In order to guarantee the transmission performance of excellent communications quality, particularly Cell Edge User, the LTE system has adopted a kind of key technology: Inter-Cell Interference Coordination (ICIC) technology.
The realization effect of ICIC in LTE planning will directly influence network planning performance.But, the temporary problem of implementation that does not relate to ICIC in the network planning known today.Along with the raising of network planning demand, this will be a ring of demanding urgently filling up in the network planning optimization work.Given this, this paper has proposed a kind of scheme that realizes uplink semi-persistent ICIC technology of in the LTE system, simulating.
Existing ICIC technology major side overweights the research of dynamic simulation platform or the realization of existing network product.Its platform or network environment are dynamic, and can realize the information interaction of S1, X2 interface, meet the realization demand of semi-static ICIC scheme.Yet network planning optimization itself is exactly to the abstract of network environment and simulation, as a kind of STATIC SIMULATION scheme, can not simulate the information interaction of X2 interface.Therefore, existing technology can not be applied directly in the network planning.For the agreement of fitting as much as possible, reach desired trade-off effect, the technical scheme that the embodiment of the invention provides will consider to adopt the thought of semi-static ICIC, the realization of approximate simulation uplink semi-persistent ICIC on stationary platforms.Describe below in conjunction with the accompanying drawing specific embodiments of the invention.
In the enforcement; For ease of understanding; For the network planning will be that example describes with network planning software LTE eNPS; This software be commercially available, can realize the present invention's (and related invention) embodiment above that, from the network planning software of Datang Mobile Communication Apparatus Co., Ltd; Yet note; Although it is related invention and discussion of the present invention be all about LTE eNPS, creationary in the technical scheme that the present invention implements to provide, also be applicable to the realization of thought approximate simulation uplink semi-persistent ICIC on stationary platforms of semi-static ICIC and the network planning software of the other types that similar functions is provided therefore quoting of LTE eNPS only played restriction as an example and not.
Fig. 1 is the analogy method implementing procedure sketch map of ICIC, and is as shown in the figure, when analog IC IC, can comprise the steps:
Step 103, according to HII (High Interference Indicator; The high interference indication) preset value, OI (Overload Indicator; Overload is indicated) and definite PRB (physical resource block, the Physical Resource Block) priority of participating in each UE of ICIC of neighboring BS information;
The several links that relates to when realizing in the face of this programme down describes.
1, customer location confirms.
In the enforcement, when confirming to belong to the UE of central user class and belonging to the UE of edge customer class, can confirm to belong to the UE and the UE that belongs to the edge customer class of central user class according to the difference of adjacent area quality and local area quality.
Concrete, so-called customer location refers to that here user attaching still is the edge customer class in the central user class.The judgement of customer location is not the far and near unique decision by user and affiliated subdistrict base station space length.Because among the LTE eNPS, UE is in case quilt is spread down, the UE position will can not change.So, can use the thought of A3 incident, judge that UE is center or edge customer.
The A3 event description is following: satisfy formula Mn+Ofn+Ocn-Hys＞Ms+Ofs+Ocs+Off, during greater than a threshold value, UE is the edge customer of local area to promptly arbitrary adjacent area quality, otherwise is central user than local area quality.
2, carrying out the mutual adjacent area of ICIC with local area confirms.
In the enforcement, when confirming to carry out the mutual adjacent sub-district of ICIC, can comprise with this sub-district:
Cover overlapping situation factor according to base station spacing, antenna directional angle, pilot signal, confirm basic Neighboring Cell List;
The local area CRS (Cell-specific reference signals, the exclusive pilot signal in sub-district) that receives with the UE that belongs to the edge customer class is a measuring amount, calculates the UE and the Geometry between each adjacent area (being Signal to Interference plus Noise Ratio) that belong to the edge customer class;
Confirm the corresponding adjacent area of the strongest Geometry of this UE, the variate-value that this adjacent area is corresponding adds 1;
The traversal local area belongs to the UE of edge customer class, and all UE that belong to the edge customer class calculate the Geometry between its and each adjacent area to local area, and the variate-value of the adjacent area of the Geometry correspondence that this UE is the strongest adds 1;
Variate-value to each adjacent area of local area sorts from high to low; M maximum adjacent area conduct of choice variable value carried out the mutual adjacent area of ICIC with local area; Perhaps, set a certain threshold value, with variate-value greater than preceding M adjacent area of threshold value as carrying out the mutual adjacent area of ICIC with local area.
Concrete, in existing network or LTE eNPS planning software, the position of minizone relation does not satisfy theoretic topological structure.Thereby, select which adjacent area conduct and local area to realize the mutual adjacent area of ICIC, a problem must considering when being planning actually.Can confirm up mutual adjacent area according to CRS.Concrete steps then can be following:
Utilize base station spacing, antenna directional angle, pilot signal to cover factors such as overlapping situation, confirm basic Neighboring Cell List; The local area CRS that receives with edge UE is a measuring amount, the Geometry between edge calculation UE and each adjacent area (being Signal to Interference plus Noise Ratio); Confirm the corresponding adjacent area of the strongest Geometry of this UE, the variate-value that this adjacent area is corresponding adds 1; Travel through this area edge UE, to the Geometry between all edge UE calculating itself and each adjacent areas of local area, the variate-value of the adjacent area that the Geometry that this UE is the strongest is corresponding adds 1; Variate-value to each adjacent area of local area sorts from high to low, and (typical value is: M=6) conduct is carried out the mutual adjacent area of ICIC with local area, confirms mutual Neighboring Cell List simultaneously in M maximum adjacent area of choice variable value.Perhaps set a certain threshold value, individual greater than M when the variate-value greater than threshold value, M is individual for to carry out the mutual adjacent area of ICIC with local area before then getting, otherwise has several adjacent areas just to get the mutual adjacent area of several conducts.
3, confirm the PRB priority of each UE of participation ICIC according to HII preset value, OI and neighboring BS information.
In the enforcement, be provided with for the local resource among this ICIC planning and PRB priority and can be:
According to spectrum efficiency and the data rate requirement of the UE of each edge customer class of this sub-district in a period of time or dispatching cycle several times, the PRB number that the UE of predicted edge user class uses;
PRB number, HII priority valve and OI according to prediction are the preferential frequency of utilization resource collection of the high number UE that confirms the edge customer class;
According to the HII and the OI of the HII of local area and OI, adjacent area, carry out the PRB number and the call number of mutual adjacent area number, local area and adjacent area of ICIC, the priority of PRB is set respectively for the UE of the UE of central user class and edge customer class.
Concrete, all can use all PRB resources for edge customer and central user, central user/edge customer resource can be used indication (all available) input scheduling module.
If the preferential frequency of utilization resource collection of edge customer planning is R
Edge_dl
PRB number, HII priority weights p according to prediction
HIIWith OI be that high number K is confirmed R
Edge_ulThe value of set and HII; Then with R
Edge_ulInput to scheduling and power control module with PRB priority.Wherein, HII is the high interference indication, has indicated following a period of time of this sub-district will distribute which PRB to give edge customer, and adjacent sub-district avoids the use of these PRB as far as possible in the scheduling edge customer; OI promptly transships indication, and indication is given on which PRB of adjacent sub-district, and excessive problem has taken place to disturb, and adjacent sub-district receives that need on corresponding PRB, reduce power after the OI indication sends, and does not perhaps use and disturbs excessive PRB.
In the practical implementation, can be:
1) according to adjacent area HII, the OI information be apprised of, PRB uses number and call number, and OI is designated as high number K, and the effect priority of various factors under factors such as different districts environment, for the HII of each PRB of local area is provided with priority weights p
HII
2) value of HII is set for local area, and informs and carry out the mutual adjacent area of ICIC with it.
According to p
HIIPriority from small to large, the HII value of establishing on the top n PRB (this N PRB will try one's best continuously) is 1, the HII value on other PRB is 0.If the p of a plurality of PRB
HIIValue identical, then HII is set, and with local area HII and OI information notification adjacent area by the fixed configurations mode.HII is set to the resource collection R that 1 PRB is the preferential use of edge customer planning
Edge_ulIn element.
In the enforcement; Can also the preferential frequency of utilization resource collection of the UE of edge user class be configured; Configuration comprises: based on mutual adjacent area number and resource multiplex situation, for local area and adjacent area G divide resource, at this ICIC in the cycle; None carried out MRP if need adjustment sub-district and adjacent area thereof, then adopted first configuration mode; Accomplish MRP if need to have in adjustment sub-district and its adjacent area the part sub-district, then adopt second configuration mode: wherein:
Configuration mode 1: resource G part is all given all sub-districts, and whole resources can be used in each sub-district, on by each PRB inside and outside the frequency range of planning, use priority are separately arranged all;
Configuration mode 2: if resource does not plan that the sub-district is identical with the resource that can preferentially use of planning the sub-district, then both resource allocations are identical with priority; Do not plan the size of remaining PRB number on total PRB number of the required maximum of cell cluster and the total resources section, less than, then surplus resources is all given the cell cluster of not accomplishing MRP; Greater than, then part UE is not activated in this ICIC, or to still needing planning but the PRB that must collide, according to the preferential planning order of the resource of configuration mode 1, planned position.
In the practical implementation, the initial stage can be adopted resource 3 minutes (situation of the G=3 in the fixed configurations mode 1), the mode of while reference cell relative geometry position, the preferential resource of using in each sub-district of as far as possible staggering.
Follow-uply can consider with reference to following side's mode resource allocation:
(a) obtain and mutual Neighboring Cell List and the priority of ICIC;
(b), confirm to have in Target cell and the adjacent area thereof the R of which sub-district according to factors such as real cell abstract shapes, real cell relative position and pilot tone covering overlapping scopes
Edge_ulBe reusable (being that preferentially the use order can be identical for resource).If reusable, represent that then the frequency resource section that Cell Edge User can preferentially use is identical.Confirm actual required resource section division number G.
(c) according to (a) with (b), give sub-district and adjacent area (1+M altogether) use thereof with the resource that G divides.Specifically, this ICIC is in the cycle, and none carried out MRP in adjustment sub-district and the adjacent area thereof if need, then redirect (d); Accomplish MRP, then redirect (e) if need to have in adjustment sub-district and its adjacent area the part sub-district.
(d) mode 1 of fixed configurations.Example is stated example 1 as follows.
(e) mode 2 of fixed configurations.Example is stated example 2 as follows.
Example 1: resource n timesharing, each local resource uses priority.
Number designation 1., 2., 3. ... represent the resource of each sub-district on this frequency band to use priority orders;
Several number designations are arranged, represent the resource on a few minutes effective band;
Every row is represented a sub-district in the form;
The resource section that 1. on behalf of this sub-district override, the number designation of every row use; The preferential use order of the PRB resource of arrow representative on this resource section.Other number designations of same column 2., 3..。Represent other sub-districts on full frequency band, use the priority of this section resource; PRB resource on this resource section preferentially use is the opposite direction of every row arrow in proper order.
Several kinds of examples are as follows:
| → | ← | |
| Sub-district 1 | ① | ② |
| Sub-district 2 | ② | ① |
| → | ← | ← | |
| Sub-district 1 | ① | ② | ③ |
| Sub-district 2 | ③ | ① | ② |
| Sub-district 3 | ② | ③ | ① |
| → | ← | ← | → | |
| Sub-district 1 | ① | ② | ③ | ④ |
| Sub-district 2 | ④ | ① | ② | ③ |
| Sub-district 3 | ③ | ④ | ① | ② |
| Sub-district 4 | ② | ③ | ④ | ① |
| → | ← | ← | → | ← | |
| Sub-district 1 | ① | ② | ③ | ④ | ⑤ |
| Sub-district 2 | ⑤ | ① | ② | ③ | ④ |
| Sub-district 3 | ④ | ⑤ | ① | ② | ③ |
| Sub-district 4 | ③ | ④ | ⑤ | ① | ② |
| Sub-district 5 | ② | ③ | ④ | ⑤ | ① |
| → | ← | ← | → | ← | ← | |
| Sub-district 1 | ① | ② | ③ | ④ | ⑤ | ⑥ |
| Sub-district 2 | ⑥ | ① | ② | ③ | ④ | ⑤ |
| Sub-district 3 | ⑤ | ⑥ | ① | ② | ③ | ④ |
| Sub-district 4 | ④ | ⑤ | ⑥ | ① | ② | ③ |
| Sub-district 5 | ③ | ④ | ⑤ | ⑥ | ① | ② |
| Sub-district 6 | ② | ③ | ④ | ⑤ | ⑥ | ① |
Example 2:
If local area and adjacent area are organized 5 sub-districts altogether, and the equal reusable not of the frequency resource that can preferentially use of each Cell Edge User, the part resource on the full frequency band is taken by sub-district 1,2,3.Can only be the still untapped frequency range 1,2 of sub-district 4,5 planning this moment.
Total PRB number of estimating when sub-district 4,5 when not planning the PRB number on the frequency range 1,2, and can be according to fixed configurations method 1, divide equally the resource on the projected resources section 1+2 not, use for sub-district 4,5.
Total PRB number of estimating when sub-district 4,5>when not planning the PRB number on the frequency range 1,2, can adopt one of following two kinds of methods to handle:
1. part UE is not activated in this ICIC;
2. at first will not plan and PRB on the frequency range 1,2 distribute to sub-district 4,5 (whose disturbs greatly local area to sub-district 4,5, whom gives to PRB earlier; As having one to be local area in the sub-district 4,5, then earlier the PRB resource is given local area).Then ask total PRB number that sub-district 4,5 estimates and do not plan the difference between the PRB number on the frequency range 1+2, obtain the PRB number that sub-district 4 must be adjacent the sub-district collision, sub-district 5 must be adjacent the PRB number of sub-district collision.Then; According to the preferential planning order of the resource in the fixed configurations mode 1; The position of giving the sub-district PRB resource that 4,5 planning must be collided is (if during according to this priority planning; Some PRB position is taken by sub-district oneself, then skips these PRB positions, uses the priority position locational PRB lower slightly than these positions).
| Sub-district 1 | Do not plan frequency range 1 | Sub-district 2 | Do not plan frequency range 2 | Sub-district 3 |
Work as G=3,1+M=4, the resource of sub-district 1 is planned in these sub-districts, the R of sub-district 4 and sub-district 1
Edge_ulReusable, sub-district 2,3 are two types when not planning cell cluster (condition that frequency resource that edge customer can preferentially use can be identical is not satisfied in 2,3 of sub-districts):
The resource allocation of 4 edges, sub-district/central user is identical with sub-district 1 with priority.
< during remaining PRB number, can surplus resources all not given the cell cluster of not accomplishing MRP on the total resources section if plan the total PRB number of the required maximum of cell cluster (even if the frequency resource reusable, the PRB number of prediction is also not necessarily identical).
If do not plan the total PRB number of the required maximum of cell cluster>on the total resources section during remaining PRB number, can adopt one of following dual mode to handle:
1., establish that remaining PRB is available on the total resources section, other PRB are set to unavailable, and the usable results input scheduling module will be here.When scheduler module is carried out resource allocation, only available PRB is distributed to edge UE and preferentially use;
2., at first remaining PRB on the total resources section is distributed to adjacent area 2,3.Then ask the difference between remaining PRB number on sub-district 2,3 required total PRB numbers and the total resources section, obtain the PRB number that adjacent area 2 must be adjacent sub-district 1,3 collisions, adjacent area 3 must be adjacent the PRB number of sub-district 1,2 collisions.Then; According to the preferential planning order of the resource of fixed configurations method 1; The resource location of giving the adjacent area PRB that 2,3 planning must be collided is (if during according to this priority planning; Some PRB position is taken by sub-district oneself, then skips these PRB positions, uses the priority position locational PRB lower slightly than these positions).
3) calculate the priority of each PRB, and the input scheduling module.
According to local area HII and OI situation, the adjacent area HII that is apprised of and OI situation, carry out the PRB number and the call number of mutual adjacent area number, local area and adjacent area of ICIC; And the effect priority of various factors under factors such as different districts environment; Use priority for central user and edge customer are provided with resource respectively, and the result will be set input to scheduler module.
3, OI is provided with.
In the enforcement, IoT (Interference over Thermal disturbs lifting) is the smooth value that disturbs the lifting of relatively hot noise, IoT
Final=α * IoT
Now+ β * IoT
LastoneBeing meant all needs IoT is done once smoothly calculating each dispatching cycle, and before each ICIC cycle begins, confirms an OI grade.IoT on each PRB can relatively come to confirm the level of interference " high, medium and low " of PRB with threshold T hresholed1 and Thresholed2 (Thresholed1 < Thresholed2), and value is respectively 2,1,0.
4, power adjustment.
In the enforcement,, calculate the level of interference mean value of each adjacent area according to the OI that is apprised of.If certain adjacent area level of interference mean value greater than certain threshold value, then can adopt following manner to carry out the power adjustment:
The P of suggestion power control module adjustment Cell Center User and/or Cell Edge User
O_UE_PUSCH(j), its example strategy is to reduce the P of central user
O_UE_PUSCH(j) be provided with, wherein, P
O_UE_PUSCH(j) be the exclusive uplink power control parameter of UE, be used for indicating the power offset values of this UE with respect to the reference transmit power of sub-district; J is the uplink that transmitting uplink data type: j=0 representes dynamic dispatching, and j=1 representes the uplink of semi-continuous scheduling; P during j=2
O_UE_PUSCH(j)=0, j=2 representes to insert at random transmission.
5, semi-static ICIC adjustment cycle.
Can after the every renewal scheduling of resource num time, carry out once the adjustment (promptly dispatch num time, do ICIC one time) of semi-static ICIC.The sign that each ICIC adjustment finishes is that local area upgrades with the adjustment that first resource was all carried out in its all adjacent areas.
In the enforcement, can obtain system loading information, judge whether carry out the simulation of ICIC through the size of comparison system load and ICIC system loading thresholding according to dispatching back system average resource for the previous period or several times.
In the enforcement, when changing, the PRB number of the HII that whether initiates ICIC adjustment and can be to be apprised of at local area, OI, prediction, self one of OI or its combination carry out the simulation of ICIC.
In the enforcement, when carrying out the simulation of ICIC, can be the beginning with the local area, adjust each adjacent area successively, all accomplish once adjustment in the cycle at this ICIC until all adjacent areas by the analog form of local area.
Describe with the example that is embodied as in LTE eNPS planning software below.
Fig. 2 is the ICIC implementing procedure sketch map of all sub-districts, and is as shown in the figure, can comprise the steps:
The size of step 202, comparison system load and ICIC system loading thresholding judges whether adopt semi-static ICIC mode;
In this step, can obtain system loading information according to dispatching back system average resource for the previous period or several times.Through the size of comparison system load and ICIC system loading thresholding, judge whether semi-static ICIC adopts;
In this step, can predict the PRB number that Cell Edge User needs;
In this step, can carry out resource and can use setting, input to scheduling and power control module;
Step 206 to 211 in, HII, OI are set, inform the adjacent area.Calculate ICIC PRB priority, and input scheduling.When pad optimization is that the HII set-up mode promptly is converted into the mode of pre-seting in the time of can realizing combined dispatching.The way of this moment becomes, and according to HII preset value and neighboring BS information, calculates ICIC PRB priority, informs scheduling, according to the scheduling situation actual HII of local area and OI is set again, and informs the adjacent area;
Uplink semi-persistent ICIC is called in step 215, end.
Step 212 to 214 in, mainly be to judge that whether this ICIC adjustment is all accomplished in all sub-districts.In this ICIC adjustment flow process, there is unmatchful this sub-district to do adjustment, have then and skip, there is not then adjustment.The adjustment thinking is following: according to the priority orders in the Neighboring Cell List, promptly local area carries out the ICIC adjustment of adjacent area successively to the interference order from high to low of adjacent area.Then, establishing the adjacent area is Target cell, adjusts the adjacent area of each adjacent area ... all accomplished once adjustment in the cycle at this ICIC until all sub-districts.Also promptly, when carrying out the simulation of ICIC, be the beginning with the local area, adjust each adjacent area successively by the analog form of local area, all accomplished once adjustment in the cycle until all adjacent areas at this ICIC.
Based on same inventive concept; The analog machine of a kind of ICIC also is provided in the embodiment of the invention; Because the principle that this equipment is dealt with problems is similar with the analogy method of Inter-Cell Interference Coordination, so the enforcement of this equipment can repeat part and repeat no more referring to the enforcement of method.
Fig. 3 is the analog machine structural representation of ICIC, and is as shown in the figure, can comprise in the equipment:
User's determination module 301 is used to the UE that confirms to belong to the UE of central user class and belong to the edge customer class;
Adjacent area determination module 302 is used for confirming to carry out the mutual adjacent area of ICIC with local area;
Scheduling and power control module 304 are used for carrying out carrying out power control after the scheduling of resource according to the priority of PRB;
In the enforcement, the priority determination module can comprise:
The PRB number is confirmed the unit, is used for spectrum efficiency and data rate requirement according to the UE of each edge customer class of this sub-district in a period of time or dispatching cycle several times, the PRB number that the UE of predicted edge user class uses;
The edge customer resource is confirmed the unit, and the PRB number, HII priority valve and the OI that are used for according to prediction are the preferential frequency of utilization resource collection of the high number UE that confirms the edge customer class;
Priority determining unit, be used for according to the HII of local area and OI, adjacent area HII and OI, carry out the PRB number and the call number of mutual adjacent area number, local area and adjacent area of ICIC, the priority of PRB is set respectively for the UE of the UE of central user class and edge customer class.
In the enforcement, can further include in the equipment:
Resource configuration unit; Be used for the preferential frequency of utilization resource collection of the UE of edge user class is configured; Said configuration comprises: based on mutual adjacent area number and resource multiplex situation, for local area and adjacent area G divide resource, at this ICIC in the cycle; None carried out MRP if need adjustment sub-district and adjacent area thereof, then adopted first configuration mode; Accomplish MRP if need to have in adjustment sub-district and its adjacent area the part sub-district, then adopt second configuration mode: wherein:
First configuration mode: resource G part is all given all sub-districts, and whole resources can be used in each sub-district, on by each PRB inside and outside the frequency range of planning, use priority are separately arranged all;
Second configuration mode: if resource does not plan that the sub-district is identical with the resource that can preferentially use of planning the sub-district, then both resource allocations are identical with priority; Do not plan the size of remaining PRB number on total PRB number of the required maximum of cell cluster and the total resources section, less than, then surplus resources is all given the cell cluster of not accomplishing MRP; Greater than, then part UE is not activated in this ICIC, or to still needing planning but the PRB that must collide, according to the preferential planning order of the resource of first configuration mode, planned position.
In the enforcement, user's determination module can also be further used for confirming to belong to according to the difference of adjacent area quality and local area quality the UE and the UE that belongs to the edge customer class of central user class.
In the enforcement, the adjacent area determination module can comprise:
The unit is confirmed in basic adjacent area, is used for covering overlapping situation factor according to base station spacing, antenna directional angle, pilot signal, confirms basic Neighboring Cell List;
Geometry confirms the unit, and the local area CRS that is used for receiving with the UE that belongs to the edge customer class is a measuring amount, calculates to belong to the UE of edge customer class and the Signal to Interference plus Noise Ratio Geometry between each adjacent area;
The Geometry processing unit is used for confirming the corresponding adjacent area of the strongest Geometry of this UE, and the variate-value that this adjacent area is corresponding adds 1; The traversal local area belongs to the UE of edge customer class, and all UE that belong to the edge customer class calculate the Geometry between its and each adjacent area to local area, and the variate-value of the adjacent area of the Geometry correspondence that this UE is the strongest adds 1;
The unit is confirmed in the adjacent area; Be used for the variate-value of each adjacent area of local area is sorted from high to low; M maximum adjacent area conduct of choice variable value carried out the mutual adjacent area of ICIC with local area; Perhaps, set a certain threshold value, with variate-value greater than preceding M adjacent area of threshold value as carrying out the mutual adjacent area of ICIC with local area.
In the enforcement, can further include in the equipment:
ICIC starts module 306, is used for obtaining system loading information according to dispatching back system average resource for the previous period or several times, judges whether carry out the simulation of ICIC through the size of comparison system load and ICIC system loading thresholding.
In the enforcement, can further include in the equipment:
In the enforcement, can further include in the equipment:
ICIC adjusts control module 308, is used for when carrying out the simulation of ICIC, and with the local area beginning, adjust each adjacent area successively by the analog form of local area, all accomplished once adjustment in the cycle until all adjacent areas at this ICIC.
Among the figure in order to show the relation between ICIC adjustment control module and the module collection that each sub-district is carried out the ICIC processing; Be that unit with dashed lines frame will carry out the module collection that ICIC handles to each sub-district and identify out with the sub-district, and with first sub-district .... the N cell ID.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when embodiment of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
Visible by the foregoing description, a kind of scheme that realizes uplink semi-persistent ICIC technology of in planning software, simulating has been proposed in the embodiment of the invention.
Concrete, provide customer location to confirm mode: to use the thought of A3 incident, promptly utilize the difference of adjacent area quality and local area quality, division center/edge customer.
Concrete, provide and local area carries out the mutual adjacent area of ICIC and confirms mode: calculate the Geometry between the adjacent area in each edge UE and all Neighboring Cell List, according to ranking results acquisition to Geometry.
Concrete, provide the preparatory dividing mode of resource to be: based on mutual adjacent area number and resource multiplex situation, for local area and adjacent area (1+M is individual altogether) G divide resource.Specifically, this ICIC is in the cycle, and none carried out MRP as if needing adjustment sub-district and adjacent area thereof, then adopted fixed configurations method 1; Accomplish MRP if need to have in adjustment sub-district and its adjacent area the part sub-district, then adopt fixed configurations method 2.
The method 1 of fixed configurations: resource G part is all given 1+M sub-district, and whole resources can be used in each sub-district, but on by each PRB inside and outside the frequency range of planning, use priority are separately arranged all.
The method 2 of fixed configurations: at first, if resource does not plan that the sub-district is identical with the resource that can preferentially use of planning the sub-district, then both resource allocations are identical with priority.Secondly, do not plan the size of remaining PRB number on total PRB number of the required maximum of cell cluster and the total resources section, less than, then surplus resources is all given the cell cluster of not accomplishing MRP; Greater than; Then part UE is not activated in this ICIC, or to still needing planning but the PRB that must collide, according to the preferential planning order of the resource of fixed configurations method 1; Planned position is (if during according to the planning of this priority; Some PRB position is taken by sub-district oneself, then skips these PRB positions, uses the priority position locational PRB lower slightly than these positions).
Concrete, providing in the stationary platforms of no X2 interface interactive information, simulation realizes uplink semi-persistent ICIC scheme, when pad optimization is in the time of can realizing combined dispatching, the HII set-up mode to be converted into the mode of pre-seting.And way is become,, calculate ICIC PRB priority, inform scheduling, according to the scheduling situation actual HII of local area and OI are set again, and inform the adjacent area according to HII preset value and neighboring BS information;
Concrete, the simulated mode of sending HII is provided: have setting promptly to inform;
Concrete, the mode of whether initiating the ICIC adjustment is provided: the PRB number of the HII that is apprised of, OI, prediction, the OI of self, arbitrary variation is promptly adjusted;
Concrete, the mode that provides the sub-district to stagger adjustment: the ICIC adjustment between the adjacent area is staggered constantly.Adjusting local area earlier, adjust the adjacent area of local area again, is Target cell with the adjacent area again, according to Neighboring Cell List priority, adjusts the adjacent area of adjacent area successively ... all accomplished once adjustment in the cycle at this ICIC until all adjacent areas.
It is a kind of in can't simulating the static programming emulation platform of X2 interface information interaction that the technical scheme that the embodiment of the invention provides provides, the scheme of simulation and realization uplink semi-persistent ICIC technology.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (16)
1. the analogy method of an Inter-Cell Interference Coordination ICIC is characterized in that, comprises the steps:
Confirm to belong to the user equipment (UE) and the UE that belongs to the edge customer class of central user class;
Confirm to carry out the mutual adjacent area of ICIC with local area;
Confirm the Physical Resource Block PRB priority of each UE of participation ICIC according to high interference indication HII preset value, overload indication OI and neighboring BS information;
Carry out carrying out power control after the scheduling of resource according to the priority of PRB;
According to the scheduling situation actual HII of local area and OI are set, and inform the adjacent area.
2. the method for claim 1 is characterized in that, confirm to participate in the priority of PRB of each UE of ICIC according to HII preset value, OI and neighboring BS information, comprising:
According to spectrum efficiency and the data rate requirement of the UE of each edge customer class of this sub-district in a period of time or dispatching cycle several times, the PRB number that the UE of predicted edge user class uses;
According to the PRB number, HII priority valve of prediction and overload indication OI is the preferential frequency of utilization resource collection of the high number UE that confirms the edge customer class;
According to the HII and the OI of the HII of local area and OI, adjacent area, carry out the PRB number and the call number of mutual adjacent area number, local area and adjacent area of ICIC, the priority of PRB is set respectively for the UE of the UE of central user class and edge customer class.
3. method as claimed in claim 2 is characterized in that, further comprises:
Preferential frequency of utilization resource collection to the UE of edge user class is configured, and said configuration comprises:
Based on mutual adjacent area number and resource multiplex situation, for local area and adjacent area G divide resource, at this ICIC in the cycle, none carried out MRP if need adjustment sub-district and adjacent area thereof, then adopted first configuration mode; Accomplish MRP if need to have in adjustment sub-district and its adjacent area the part sub-district, then adopt second configuration mode: wherein:
First configuration mode: resource G part is all given all sub-districts, and whole resources can be used in each sub-district, on by each PRB inside and outside the frequency range of planning, use priority are separately arranged all;
Second configuration mode: if resource does not plan that the sub-district is identical with the resource that can preferentially use of planning the sub-district, then both resource allocations are identical with priority; Do not plan the size of remaining PRB number on total PRB number of the required maximum of cell cluster and the total resources section, less than, then surplus resources is all given the cell cluster of not accomplishing MRP; Greater than, then part UE is not activated in this ICIC, or to still needing planning but the PRB that must collide, according to the preferential planning order of the resource of first configuration mode, planned position.
4. the method for claim 1 is characterized in that, when confirming to belong to the UE of central user class and belonging to the UE of edge customer class, confirms to belong to the UE and the UE that belongs to the edge customer class of central user class according to the difference of adjacent area quality and local area quality.
5. the method for claim 1 is characterized in that, when confirming to carry out the mutual adjacent sub-district of ICIC with this sub-district, comprising:
Cover overlapping situation factor according to base station spacing, antenna directional angle, pilot signal, confirm basic Neighboring Cell List;
The local area cell special reference CRS that receives with the UE that belongs to the edge customer class is a measuring amount, calculates to belong to the UE of edge customer class and the Signal to Interference plus Noise Ratio Geometry between each adjacent area;
Confirm the corresponding adjacent area of the strongest Geometry of this UE, the variate-value that this adjacent area is corresponding adds 1;
The traversal local area belongs to the UE of edge customer class, and all UE that belong to the edge customer class calculate the Geometry between its and each adjacent area to local area, and the variate-value of the adjacent area of the Geometry correspondence that this UE is the strongest adds 1;
Variate-value to each adjacent area of local area sorts from high to low; M maximum adjacent area conduct of choice variable value carried out the mutual adjacent area of ICIC with local area; Perhaps, set a certain threshold value, with variate-value greater than preceding M adjacent area of threshold value as carrying out the mutual adjacent area of ICIC with local area.
6. like the arbitrary described method of claim 1 to 5; It is characterized in that; Obtain system loading information according to dispatching back system average resource for the previous period or several times, judge whether carry out the simulation of ICIC through the size of comparison system load and ICIC system loading thresholding.
7. like the arbitrary described method of claim 1 to 6, it is characterized in that, carry out the adjustment of ICIC when the PRB number of the HII that whether initiates ICIC adjustment and be to be apprised of at local area, OI, prediction, self one of OI or its combination change.
8. like the arbitrary described method of claim 1 to 7, it is characterized in that, when carrying out the simulation of ICIC, is the beginning with the local area, adjusts each adjacent area successively by the analog form of local area, all accomplishes once adjustment in the cycle at this ICIC until all adjacent areas.
9. the analog machine of an ICIC is characterized in that, comprising:
User's determination module is used to the UE that confirms to belong to the UE of central user class and belong to the edge customer class;
The adjacent area determination module is used for confirming to carry out the mutual adjacent area of ICIC with local area;
The priority determination module is used for the PRB priority according to each UE of the definite ICIC of participation of HII preset value, OI and neighboring BS information;
Scheduling and power control module are used for carrying out carrying out power control after the scheduling of resource according to the priority of PRB;
Notification module is used for according to the scheduling situation actual HII of local area and OI being set, and informs the adjacent area.
10. equipment as claimed in claim 9 is characterized in that, the priority determination module comprises:
The PRB number is confirmed the unit, is used for spectrum efficiency and data rate requirement according to the UE of each edge customer class of this sub-district in a period of time or dispatching cycle several times, the PRB number that the UE of predicted edge user class uses;
The edge customer resource is confirmed the unit, and the PRB number, HII priority valve and the OI that are used for according to prediction are the preferential frequency of utilization resource collection of the high number UE that confirms the edge customer class;
Priority determining unit, be used for according to the HII of local area and OI, adjacent area HII and OI, carry out the PRB number and the call number of mutual adjacent area number, local area and adjacent area of ICIC, the priority of PRB is set respectively for the UE of the UE of central user class and edge customer class.
11. equipment as claimed in claim 10 is characterized in that, further comprises:
Resource configuration unit; Be used for the preferential frequency of utilization resource collection of the UE of edge user class is configured; Said configuration comprises: based on mutual adjacent area number and resource multiplex situation, for local area and adjacent area G divide resource, at this ICIC in the cycle; None carried out MRP if need adjustment sub-district and adjacent area thereof, then adopted first configuration mode; Accomplish MRP if need to have in adjustment sub-district and its adjacent area the part sub-district, then adopt second configuration mode: wherein:
First configuration mode: resource G part is all given all sub-districts, and whole resources can be used in each sub-district, on by each PRB inside and outside the frequency range of planning, use priority are separately arranged all;
Second configuration mode: if resource does not plan that the sub-district is identical with the resource that can preferentially use of planning the sub-district, then both resource allocations are identical with priority; Do not plan the size of remaining PRB number on total PRB number of the required maximum of cell cluster and the total resources section, less than, then surplus resources is all given the cell cluster of not accomplishing MRP; Greater than, then part UE is not activated in this ICIC, or to still needing planning but the PRB that must collide, according to the preferential planning order of the resource of first configuration mode, planned position.
12. equipment as claimed in claim 9 is characterized in that, user's determination module is further used for confirming to belong to according to the difference of adjacent area quality and local area quality the UE and the UE that belongs to the edge customer class of central user class.
13. equipment as claimed in claim 9 is characterized in that, the adjacent area determination module comprises:
The unit is confirmed in basic adjacent area, is used for covering overlapping situation factor according to base station spacing, antenna directional angle, pilot signal, confirms basic Neighboring Cell List;
Geometry confirms the unit, and the local area CRS that is used for receiving with the UE that belongs to the edge customer class is a measuring amount, calculates to belong to the UE of edge customer class and the Signal to Interference plus Noise Ratio Geometry between each adjacent area;
The Geometry processing unit is used for confirming the corresponding adjacent area of the strongest Geometry of this UE, and the variate-value that this adjacent area is corresponding adds 1; The traversal local area belongs to the UE of edge customer class, and all UE that belong to the edge customer class calculate the Geometry between its and each adjacent area to local area, and the variate-value of the adjacent area of the Geometry correspondence that this UE is the strongest adds 1;
The unit is confirmed in the adjacent area; Be used for the variate-value of each adjacent area of local area is sorted from high to low; M maximum adjacent area conduct of choice variable value carried out the mutual adjacent area of ICIC with local area; Perhaps, set a certain threshold value, with variate-value greater than preceding M adjacent area of threshold value as carrying out the mutual adjacent area of ICIC with local area.
14. like the arbitrary described equipment of claim 9 to 13, it is characterized in that, further comprise:
ICIC starts module, is used for obtaining system loading information according to dispatching back system average resource for the previous period or several times, judges whether carry out the simulation of ICIC through the size of comparison system load and ICIC system loading thresholding.
15. like the arbitrary described equipment of claim 9 to 14, it is characterized in that, further comprise:
The ICIC adjusting module carries out the adjustment of ICIC when the PRB number of the HII that is used for being apprised of at local area, OI, prediction, self one of OI or its combination change.
16. like the arbitrary described equipment of claim 9 to 15, it is characterized in that, further comprise:
ICIC adjusts control module, is used for when carrying out the simulation of ICIC, and with the local area beginning, adjust each adjacent area successively by the analog form of local area, all accomplished once adjustment in the cycle until all adjacent areas at this ICIC.
Priority Applications (2)
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| CN201010288603.8A CN102413477B (en) | 2010-09-20 | 2010-09-20 | Simulation method for inter-cell interference coordination, and device therefor |
| PCT/CN2011/079816 WO2012037868A1 (en) | 2010-09-20 | 2011-09-19 | Inter-cell interference coordination imitation method and equipment thereof |
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| CN201010288603.8A CN102413477B (en) | 2010-09-20 | 2010-09-20 | Simulation method for inter-cell interference coordination, and device therefor |
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| WO2012037868A1 (en) | 2012-03-29 |
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