CN103067927B - A kind of optimization method of presence of intercell interference and device - Google Patents
A kind of optimization method of presence of intercell interference and device Download PDFInfo
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Abstract
The invention provides a kind of optimization method and device of many adjacent areas interference, method wherein specifically comprises: gather existing network data and drive test data; According to the whole network cell list and geographic information data, obtain cell edge region; For current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area; For current area, obtain the received power of its adjacent area according to described drive test data and its cell edge region; For current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtain the co-channel interference weight of its adjacent area to this current area; When corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, the parameter of this adjacent area is adjusted.The present invention can carry out the optimization of presence of intercell interference better, thus can improve the network covering property of community.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of optimization method and device of many adjacent areas interference.
Background technology
For LTE (Long Term Evolution, Long Term Evolution) system, the OFDMA(OFDM of its uniqueness adopted, Orthogonal Frequency Division Multiple Access) access way, user profile in Shi Zhe community is carried on mutually orthogonal different carrier, and therefore all interference come from other communities.For the user of center of housing estate. itself is just closer from the distance of base station, and the interference signal distance of outer community is far away, then its SINR(Signal to Interference plus Noise Ratio, Signal toInterference plus Noise Ratio) relatively large: but for the user of cell edge, the user taking same carrier resource due to neighbor cell is larger to its interference ratio, in addition distance base station itself is far away, its SINR is relatively just less, although cause the throughput of community entirety higher, the QoS of customer of cell edge is poor. throughput is lower.Therefore, in LTE system, the optimization of presence of intercell interference is extremely important.
The optimization method of existing a kind of presence of intercell interference, emulates the wireless coverage in region according to the data such as electronic chart and propagation model, and interference optimization is carried out in the descending interference of LTE system determined according to simulation result; But, because emulation uses fixing model, and in real network, UE(subscriber equipment, User Equipment) dynamic change that takies resource causes presence of intercell interference to be also dynamic change, and like this, simulation result cannot the coverage condition of precise evaluation real network, this simulation result is poor for the directiveness of the optimization of presence of intercell interference, thus makes the effect of optimization of presence of intercell interference undesirable.
In a word, the technical problem needing those skilled in the art urgently to solve is exactly: the optimization how can carrying out presence of intercell interference better.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of optimization method and device of many adjacent areas interference, can carry out the optimization of presence of intercell interference better, thus can improve the network covering property of community.
In order to solve the problem, the invention discloses a kind of optimization method of many adjacent areas interference, comprising:
Gather existing network data and drive test data;
According to the whole network cell list and geographic information data, obtain cell edge region;
For current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
For current area, obtain the received power of its adjacent area according to described drive test data and its cell edge region;
For current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtain the co-channel interference weight of its adjacent area to this current area;
When corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, the parameter of this adjacent area is adjusted.
Preferably, described existing network data comprises network configuration data and the call log data of network element;
Then described for current area, obtain the step of the same time-frequency resource quantity of its adjacent area according to described existing network data, comprising:
According to the network configuration data of described network element, obtain current area and the DRS (Dedicated Reference Signal) CRS of adjacent area thereof and the physical resource mapping position of control channel;
According to described call log data, obtain the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
According to current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtain the CRS of its adjacent area and the same time-frequency resource quantity of control channel;
The running time-frequency resource position of the Traffic Channel of foundation current area and adjacent area thereof, obtains the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
Preferably, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, at least comprise in following adjustment one or more:
Adjust the Physical Cell Identifier of this adjacent area, adjust the antenna parameter of this adjacent area, and, adjust the power of this adjacent area.
Preferably, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, comprising:
Parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.
Preferably, the step of the antenna parameter of described this adjacent area of adjustment, comprising: the Downtilt increasing this adjacent area, and/or, reduce the antenna height of this adjacent area.
Preferably, the step of the power of described this adjacent area of adjustment, comprising:
When corresponding coverage threshold being exceeded to the CRS co-channel interference weight of this current area in adjacent area, lower the CRS power of this adjacent area;
When corresponding coverage threshold being exceeded to the control channel co-channel interference weight of this current area in adjacent area, lower the control channel power of this adjacent area;
In adjacent area, corresponding coverage threshold is exceeded to the Traffic Channel co-channel interference weight of this current area, and when coordinating district interference ICIC switch cuts out, lower the service channel power of this adjacent area.
Preferably, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, comprising:
Adjustment determining step: judge whether to there is the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold, if so, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistic procedure, the initial mark of described adjacent area to be adjusted is not for adjust, and current adjustment number of times is 0;
Statistic procedure: add up all adjacent areas to be adjusted;
Set-up procedure: select arbitrary from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark step: to the adjacent area of carrying out parameter adjustment, its mark is revised as adjusted;
Mark determining step: according to the mark of adjacent area to be adjusted, judges whether there is adjusted adjacent area in the adjacent area to be adjusted added up, and if so, then returns and performs adjustment determining step, otherwise perform iteration determining step;
Iteration determining step; Judge whether current adjustment number of times reaches iterations, if so, then return and perform adjustment determining step, otherwise return execution statistic procedure.
Preferably, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, comprising:
Descending is carried out to the co-channel interference weight of all adjacent areas to this current area;
Preferentially to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
On the other hand, the invention also discloses a kind of optimization device of many adjacent areas interference, comprising:
Acquisition module, for gathering existing network data and drive test data;
Cell edge region acquisition module, for according to the whole network cell list and geographic information data, obtains cell edge region;
With time-frequency resource quantity acquisition module, for for current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
Received power acquisition module, for for current area, obtains the received power of its adjacent area according to described drive test data and its cell edge region;
Co-channel interference Weight Acquisition module, for for current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtains the co-channel interference weight of its adjacent area to this current area; And
Adjacent area parameter adjustment module, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the parameter of this adjacent area.
Preferably, described existing network data comprises network configuration data and the call log data of network element;
Then described same time-frequency resource quantity acquisition module comprises:
RE mapping position obtains submodule, for the network configuration data according to described network element, obtains current area and the DRS (Dedicated Reference Signal) CRS of adjacent area thereof and the physical resource mapping position of control channel;
Running time-frequency resource position acquisition submodule, for according to described call log data, obtains the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
First obtains submodule with time-frequency resource quantity, for according to current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtains the CRS of its adjacent area and the same time-frequency resource quantity of control channel; And
Second obtains submodule with time-frequency resource quantity, for the running time-frequency resource position of the Traffic Channel according to current area and adjacent area thereof, obtains the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
Preferably, described adjacent area parameter adjustment module, at least comprise in following adjustment submodule one or more:
PCI adjusts submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the Physical Cell Identifier of this adjacent area;
Tested rotating platform submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the antenna parameter of this adjacent area; And
Power adjustment submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the power of this adjacent area.
Preferably, described adjacent area parameter adjustment module, comprising:
Work order issues submodule, for parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.
Preferably, described tested rotating platform submodule, specifically for increasing the Downtilt of this adjacent area, and/or, reduce the antenna height of this adjacent area.
Preferably, described power adjustment submodule comprises:
Signal power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the CRS co-channel interference weight of this current area, lowers the CRS power of this adjacent area;
Control channel power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the control channel co-channel interference weight of this current area, lowers the control channel power of this adjacent area;
Service channel power adjustment unit, for exceeding corresponding coverage threshold in adjacent area to the Traffic Channel co-channel interference weight of this current area, and when coordinating district interference ICIC switch cuts out, lowers the service channel power of this adjacent area.
Preferably, described adjacent area parameter adjustment module, comprising:
Adjustment judges submodule, the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold is there is for judging whether, if, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistics submodule, the initial mark of described adjacent area to be adjusted is not for adjust, and current adjustment number of times is 0;
Statistics submodule, for adding up all adjacent areas to be adjusted;
Adjustment submodule, arbitrary for selecting from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark submodule, for the adjacent area of carrying out parameter adjustment, is revised as adjusted by its mark;
Mark judges submodule, for the mark according to adjacent area to be adjusted, judges whether there is adjusted adjacent area in the adjacent area to be adjusted added up, if so, then triggers described adjustment and judge submodule, otherwise holds the described iteration of triggering and judge submodule;
Iteration judges submodule, for judging whether current adjustment number of times reaches iterations, if so, then triggering described adjustment and judging submodule, otherwise triggering described statistics submodule.
Preferably, described adjacent area parameter adjustment module, comprising:
Descending submodule, for carrying out descending to the co-channel interference weight of all adjacent areas to this current area; And
Priority parameters adjustment submodule, for preferential to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
Compared with prior art, the present invention has the following advantages:
The present invention is according to the existing network data gathered and drive test data, obtain adjacent area to the co-channel interference of cell edge region, and when corresponding coverage threshold being exceeded to the co-channel interference of cell edge region in adjacent area, by realizing the optimization of presence of intercell interference to the parameter adjustment of this adjacent area.The existing network data used due to the embodiment of the present invention and drive test data derive from real network, it can reflect that UE takies the dynamic change of the real networks such as the dynamic change of resource, like this, in the present invention, the coverage condition of real network accurately can be reflected in adjacent area to the co-channel interference of cell edge region, the directiveness that the optimization for presence of intercell interference has had; Further, the adjacent area parameter adjustment that the present invention carries out the co-channel interference of cell edge region according to adjacent area, can carry out the optimization of presence of intercell interference preferably, thus can improve the network covering property of community.
Accompanying drawing explanation
Fig. 1 is the flow chart of the optimization method embodiment of a kind of many adjacent areas interference of the present invention;
Fig. 2 is the structure chart of the optimization device embodiment of a kind of many adjacent areas interference of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
With reference to Fig. 1, show the flow chart of the optimization method embodiment of a kind of many adjacent areas interference of the present invention, specifically can comprise:
Step 101, collection existing network data and drive test data;
Existing network data of the present invention specifically can comprise network configuration data and the call log data of network element.Here network element can comprise base station, MME(Mobility Management Entity, Mobility ManagementEntity) etc.; Network configuration data can comprise each eNB(evolved base station in the whole network, evolved NodeB), the concrete network configuration parameters etc. of each community; Call log data specifically can comprise all data relevant to calling, usually by network equipment records such as base stations.
In actual applications, the embodiment of the present invention can gather existing network data automatically by the mode of configuration task.Such as, in a kind of application example of the present invention, acquisition tasks can be set up.And following parameter is set by control inerface:
The Network element object optimized, as specified the eNB in existing network;
Optimize time range, can specific to hour, minute etc.;
The collection period of network configuration data;
The collection period of call log data.
According to the parameter of above-mentioned setting, the network configuration data in the corresponding period and call log data periodically can be gathered.
In wireless communication networks construction and the maintenance process in later stage, need the property indices being carried out Sampling network by continuous drive test, specifically can comprise network coverage and communication quality etc., the property indices of these networks all can as a part for drive test data.In practice, described drive test data can be collected by road measuring device, and periodically reports NM server.
In specific implementation, the embodiment of the present invention can based on eNB, OMC(operation maintenance center, Operations & Maintenance Center), the communication of drive test NM server gathers existing network data and drive test data.
Step 102, foundation the whole network cell list and geographic information data, obtain cell edge region;
The whole network cell list of the embodiment of the present invention can be optimized engineer by the network planning and sets up and safeguard, it specifically can comprise the configuration informations such as community longitude and latitude, antenna beamwidth, angle of declination, antenna directional angle, antenna height, indoor and outdoor type.
The basic data of the geographic information data general reference network planning Optimization Software of the embodiment of the present invention, specifically can comprise the numerical maps such as digital line map, Digital height model, building distribution map.
In specific implementation, the embodiment of the present invention can import described the whole network cell list and geographic information data, to obtain cell edge region.
In an embodiment of the present invention, described according to the whole network cell list and geographic information data, obtain the step of cell edge region, specifically can comprise:
Sub-step S101, based on GIS(GIS-Geographic Information System, Geographic Information System) own Thiessen polygon function, generate the Thiessen polygon of base station;
Here GIS is also the system that geographic information data relies on.
Sub-step S102, according to the antenna directional angle in the whole network cell list, draw the angular bisector of the antenna directional angle angle of neighbor cell in base station, by the convex polygon that the angle line of the angular bisector of the Thiessen polygon and neighbor cell that comprise current area surrounds, be defined as the Thiessen polygon of this current area, i.e. cell coverage area;
Sub-step S103, for generated cell coverage area, each community of poll is as the sampled point of main plot, and record belongs to the sampled point of marginal point, and the region of marginal point composition is cell edge region.
Cell edge region can be understood as the edge of MPS process, and at the marginal point that it comprises, the signal of current area drops in adjacent area district coverage, therefore easily receives the co-channel interference of adjacent area.
The embodiment of the present invention can provide as down contour point determination methods: poll grid point, judges whether 8 points around this grid point exist the point belonging to other communities, if existed, then this grid point thinks cell edge point.Be appreciated that the embodiment of the present invention is not limited concrete marginal point determination methods.
Step 103, for current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
LTE system adopts the access way of OFDMA, and the bandwidth taken is divided into a lot of subcarrier by OFDMA, and the signal of user carries on sub-carriers, wherein, frequency takies a subcarrier, takies the time of an OFDMA symbol time, be called a time-frequency lattice point.Multiplexing factor due to OFDMA is that the user in 1, Gu Yige community shares all time-frequency lattice points, and different users takies different time-frequency lattice points respectively, is completely orthogonal between user and user, therefore interference between user in community is very little.But, on the basis that the satisfied non-conterminous subcarrier distributing to a user is spacedly distributed, interference between the user of adjacent co-frequency cell is still larger, the embodiment of the present invention adopts the physical resource of adjacent area to map to map with the physical resource of this current area and identically represents together frequency district, and obtain the same running time-frequency resource of adjacent area, to obtain the co-channel interference of adjacent area to cell edge region further.
In one preferred embodiment of the invention, described existing network data specifically can comprise network configuration data and the call log data of network element;
Then described for current area, obtain the step of the same time-frequency resource quantity of its adjacent area according to described existing network data, specifically can comprise:
Sub-step S201, network configuration data according to described network element, obtain the DRS (Dedicated Reference Signal) CRS(cell special reference of current area and adjacent area thereof, Cell-specific reference signals) and the physical resource mapping position of control channel;
In the embodiment of the present invention, control channel specifically can comprise: PBCH(Physical Broadcast Channel, Physical broadcast channel), PCFICH (Physical Control Format Indicator Channel, PhysicalControl Format Indicator Channel), PHICH(Physical HARQ Indicator Channel, PhysicalHybrid Indicator Channel) etc.
In practice, include cell configuration parameter list in the network configuration data of network element, then can identify according to the community physical I D(of cell configuration parameter list acquisition current area and adjacent area, Identity), for convenience of description, current area is assumed to be A community; So, passable
According to community physical I D, calculate the physical resource mapping position of the CRS of A community and adjacent area thereof;
According to community physical I D, calculate the physical resource mapping position of the PBCH channel of A community and adjacent area thereof;
According to community physical I D, calculate the physical resource mapping position of the PCFICH channel of A community and adjacent area thereof;
According to community physical I D, calculate the physical resource mapping position of the PHICH channel of A community and adjacent area thereof.
Sub-step S202, according to described call log data, obtain the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
In the embodiment of the present invention, the running time-frequency resource position of Traffic Channel mainly can comprise downlink traffic channel PRB(Physical Resource Block, Physical Resource Block) shared by running time-frequency resource position, described downlink traffic channel mainly can comprise PDSCH(Physical Downlink Shared Channel, Physical DownlinkShared Channel) channel.
In specific implementation, the descending sub frame schedule information of A community and adjacent area thereof can be added up according to call log data, and obtain the running time-frequency resource position shared by downlink traffic channel PRB further.
Sub-step S203, foundation current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtain the CRS of its adjacent area and the same time-frequency resource quantity of control channel;
Sub-step S204, running time-frequency resource position according to the Traffic Channel of current area and adjacent area thereof, obtain the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
The running time-frequency resource position of the CRS in known current area and adjacent area thereof, control channel or Traffic Channel, the embodiment of the present invention can obtain the same time-frequency resource quantity of the Traffic Channel of its adjacent area according to consensus standard, the embodiment of the present invention is not limited concrete acquisition process.
Step 104, for current area, obtain the received power of its adjacent area according to described drive test data and its cell edge region;
In actual applications, read drive test data, and screening is positioned at the sampled point of A cell edge region, obtain the RSRP(Reference Signal Received Power of adjacent area, Reference Signal Receiving Power), PCFICH received power, PBCH received power, PHICH received power, PDSCH received power.
Step 105, for current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtain the co-channel interference weight of its adjacent area to this current area;
Different channels/signal co-channel interference the weight of adjacent area to A community is as follows:
CRS disturbs weight T1=with running time-frequency resource RE(example resources, Resource Element) number × RSRP;
PCFICH disturbs weight T2=with running time-frequency resource RE number × PCFICH received power;
PBCH disturbs weight T3=with running time-frequency resource RE number × PBCH received power;
PHICH disturbs weight T4=with running time-frequency resource RE number × PHICH received power;
PDSCH disturbs weight T5=with running time-frequency resource RE number × PDSCH received power.
Step 106, when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, the parameter of this adjacent area to be adjusted.
Coverage threshold in the embodiment of the present invention obtains by preset, wherein different co-channel interference weights can corresponding different coverage threshold, as above-mentioned T1, T2, T3, T4, T5 can have different coverage threshold, coverage threshold wherein can be preset according to actual network environment by those skilled in the art, the present invention then can obtain preset coverage threshold by Corpus--based Method, and the present invention is not limited concrete coverage threshold and pre-setting method.
In one preferred embodiment of the invention, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, at least can comprise in following adjustment one or more:
Adjustment 1,
Adjust the PCI(Physical Cell Identifier of this adjacent area, Physical Cell ID);
When CRS in adjacent area disturbs weight T1 > TH1, the PCI of this adjacent area can be adjusted.Such as, according to agreement 36211-870, the description of 6.10 joints is known, and reference signal frequency displacement can be obtained by PCI: shift=PCImod6, and mod is mod here, therefore when reality adjusts, the value can evading the neighboring interval PCI single port mod6 of current area is equal, or the value can evading the neighboring interval PCI2 port mod3 of current area is equal, easily cause presence of intercell interference to increase because equal, affect channel estimating and measurement.
Adjustment 2,
Adjust the antenna parameter of this adjacent area;
The step of the antenna parameter of described this adjacent area of adjustment, specifically can comprise: the Downtilt increasing this adjacent area, and/or, reduce the antenna height of this adjacent area.
Such as, the CRS in adjacent area disturbs weight T1 > TH1, or during T2 > TH2, the sector angle of declination of this adjacent area can be increased a step-length, to increase angle of declination angle, a step-length is here generally 1 degree;
And for example, at the T2 > TH2 of adjacent area, or, during T3 > TH3, the sector height of this adjacent area can be reduced by a step-length, to lower antenna height.
Adjustment 3,
Adjust the power of this adjacent area.
In practice, when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, the channel of this adjacent area or signal power can be reduced by a step-length, to reach the object of lower adjusting power.
In one preferred embodiment of the invention, the step of the power of described this adjacent area of adjustment, specifically can comprise:
Sub-step S301, when corresponding coverage threshold being exceeded to the CRS co-channel interference weight of this current area in adjacent area, lower the CRS power of this adjacent area;
Sub-step S302, when corresponding coverage threshold being exceeded to the control channel co-channel interference weight of this current area in adjacent area, lower the control channel power of this adjacent area;
Specifically, if the PCFICH of adjacent area disturbs weight >PCFICH coverage threshold, then the PCFICH power of this adjacent area can be lowered; If the PBCH of adjacent area disturbs weight >PBCH coverage threshold, then can lower the PBCH power of this adjacent area; If the PHICH of adjacent area disturbs weight >PHICH coverage threshold, then can lower the PHICH power of this adjacent area, etc.
Sub-step S303, in adjacent area, corresponding coverage threshold is exceeded to the Traffic Channel co-channel interference weight of this current area, and coordinating district interference ICIC(coordinating district interference, Inter-Cell InterferenceCoordination) switch close time, lower the service channel power of this adjacent area.
It should be noted that, when ICIC switch opens, because ICIC function works, therefore the service channel power of this adjacent area can not be adjusted, as PDSCH power.
In addition, it should be noted that, in the process of power adjustment, the desired value of power can not exceed community maximum transmission power.
Moreover consider TD-LTE network characteristic, the channels such as PBCH, PHICH require higher to signal strength signal intensity, therefore when carrying out power adjustment, the power adjustment priority of the channels such as PBCH, PHICH is minimum, or, do not participate in optimizing and revising; In the embodiment of the present invention, adjustment priority is for representing the degree of priority at parameter tuning process, and in parameter tuning process, the adjacent area that adjustment priority is high or channel are preferentially adjusted.
In one preferred embodiment of the invention, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, specifically can comprise:
Sub-step S401, parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.Here existing network can comprise base station etc.
In the embodiment of the present invention, the parameter adjustment of step 106 can be a continuous print process, also namely can constantly according to the existing network data gathered and drive test data, obtain adjacent area to the co-channel interference of cell edge region, and when corresponding coverage threshold being exceeded to the co-channel interference of cell edge region in adjacent area, by realizing the optimization of presence of intercell interference to the parameter adjustment of this adjacent area.
Further, the embodiment of the present invention can also continuous surveillance adjusted adjacent area to the co-channel interference of cell edge region, to assess adjusted adjacent area, whether the co-channel interference of current area is caused by parameter configuration is unreasonable.Such as, if the co-channel interference of adjusted adjacent area to current area alleviates, then illustrate that parameter adjustment serves effect, co-channel interference causes by parameter configuration is unreasonable; If the co-channel interference of adjusted adjacent area to current area does not alleviate, then illustrate that due effect is not played in parameter adjustment, co-channel interference does not cause by parameter configuration is unreasonable, then can send to the network optimization engineer prompting adopting other optimization means.In a word, the present invention, according to the existing network data gathered and drive test data, obtains adjacent area and can play the supervisory function bit covering index preferably to the co-channel interference of cell edge region, and the optimization for presence of intercell interference has good directive significance.
In addition, current area has multiple adjacent area usually, and the part or all of co-channel interference weight to current area in this multiple adjacent area all likely exceedes corresponding coverage threshold, therefore may need to adjust the parameter of multiple adjacent area; And, the co-channel interference weight of adjusted adjacent area still likely exceedes corresponding coverage threshold, therefore parameter adjustment of the present invention may be a long-term process, in one preferred embodiment of the invention, in order to prevent parameter adjustment to be absorbed in endless loop, the parameter tuning process of an iteration can be set;
Specifically, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, specifically can comprise:
Adjustment determining step S401: judge whether to there is the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold, if, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistic procedure S402, the initial mark of described adjacent area to be adjusted is not for adjust, current adjustment number of times is 0;
Statistic procedure S402: add up all adjacent areas to be adjusted;
Set-up procedure S403: select arbitrary from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark step S404: to the adjacent area of carrying out parameter adjustment, its mark is revised as adjusted;
Mark determining step S405: according to the mark of adjacent area to be adjusted, judges whether there is adjusted adjacent area in the adjacent area to be adjusted added up, and if so, then returns and performs adjustment determining step S401, otherwise perform iteration determining step S406;
Iteration determining step S406; Judge whether current adjustment number of times reaches iterations, if so, then return and perform adjustment determining step S401, otherwise return execution statistic procedure S402.
Here iterations can be arranged flexibly according to actual conditions, and the embodiment of the present invention is not limited concrete iterations.
Mention above, the embodiment of the present invention can adopt adjustment priority list to be shown in the degree of priority of parameter tuning process, and in parameter tuning process, the adjacent area that adjustment priority is high or channel are preferentially adjusted.
Therefore in one preferred embodiment of the invention, the adjustment priority of adjacent area can be determined according to the co-channel interference weight of adjacent area to this current area, preferentially to adjust the high adjacent area of priority, correspondingly, described when corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, to the step that the parameter of this adjacent area adjusts, specifically can comprise:
Step S501, descending is carried out to the co-channel interference weight of all adjacent areas to this current area;
Step S502, preferentially to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
Embodiment of the present invention tool has the following advantages:
First, the embodiment of the present invention can realize in special network optimisation tool, and also can obtain result according to long-term statistics, parameter adjustment now will play better optimization function to presence of intercell interference, and described optimization can improve the covering performance of network;
Secondly, the present invention is automatic flow, without the need to manual intervention, comprising: automatically gather and import related data (existing network data, drive test data, the whole network cell data and geographic information data etc.), automatic acquisition adjacent area, to the co-channel interference of current area, adjusts parameter of adjacent area etc. automatically;
Moreover the optimization of the present invention to presence of intercell interference has good directive significance; Such as, the present invention can continuous surveillance adjusted adjacent area to the co-channel interference of cell edge region, to assess adjusted adjacent area, whether the co-channel interference of current area is caused by parameter configuration is unreasonable.Such as, if co-channel interference causes by parameter configuration is unreasonable, then parameter adjustment can be played and optimize operation preferably; If co-channel interference does not cause by parameter configuration is unreasonable, then can send to the network optimization engineer prompting adopting other optimization means; In a word, the present invention, according to the existing network data gathered and drive test data, obtains adjacent area and can play the supervisory function bit covering index preferably to the co-channel interference of cell edge region, and the optimization for presence of intercell interference has good directive significance;
Further, the present invention analyzes and finds that the efficiency of wireless parameter allocation problem is high, has good specific aim and accuracy for antenna parameter optimization, PCI parameter optimization, power parameter optimization etc.;
In a word, full automatic prioritization scheme of the present invention can save test analysis manpower, promotes network optimization efficiency, reduces network optimization cost, and can improve intellectuality, the automaticity of the network optimization.
With reference to Fig. 2, show the structure chart of the optimization device embodiment of a kind of many adjacent areas interference of the present invention, specifically can comprise:
Acquisition module 201, for gathering existing network data and drive test data;
Cell edge region acquisition module 202, for according to the whole network cell list and geographic information data, obtains cell edge region;
With time-frequency resource quantity acquisition module 203, for for current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
Received power acquisition module 204, for for current area, obtains the received power of its adjacent area according to described drive test data and its cell edge region;
Co-channel interference Weight Acquisition module 205, for for current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtains the co-channel interference weight of its adjacent area to this current area; And
Adjacent area parameter adjustment module 206, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the parameter of this adjacent area.
In one preferred embodiment of the invention, described existing network data specifically can comprise network configuration data and the call log data of network element;
Then described same time-frequency resource quantity acquisition module 203 specifically can comprise:
RE mapping position obtains submodule, for the network configuration data according to described network element, obtains current area and the DRS (Dedicated Reference Signal) CRS of adjacent area thereof and the physical resource mapping position of control channel;
Running time-frequency resource position acquisition submodule, for according to described call log data, obtains the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
First obtains submodule with time-frequency resource quantity, for according to current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtains the CRS of its adjacent area and the same time-frequency resource quantity of control channel; And
Second obtains submodule with time-frequency resource quantity, for the running time-frequency resource position of the Traffic Channel according to current area and adjacent area thereof, obtains the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
In another preferred embodiment of the invention, described adjacent area parameter adjustment module 206, at least can comprise in following adjustment submodule one or more:
PCI adjusts submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the Physical Cell Identifier of this adjacent area;
Tested rotating platform submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the antenna parameter of this adjacent area; And
Power adjustment submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the power of this adjacent area.
In another preferred embodiment of the present invention, described adjacent area parameter adjustment module 206, specifically can comprise:
Work order issues submodule, for parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.
In one preferred embodiment of the invention, described tested rotating platform submodule, can specifically for increasing the Downtilt of this adjacent area, and/or, reduce the antenna height of this adjacent area.
In another preferred embodiment of the invention, described power adjustment submodule specifically can comprise:
Signal power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the CRS co-channel interference weight of this current area, lowers the CRS power of this adjacent area;
Control channel power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the control channel co-channel interference weight of this current area, lowers the control channel power of this adjacent area;
Service channel power adjustment unit, for exceeding corresponding coverage threshold in adjacent area to the Traffic Channel co-channel interference weight of this current area, and when coordinating district interference ICIC switch cuts out, lowers the service channel power of this adjacent area.
In another preferred embodiment of the present invention, described adjacent area parameter adjustment module 206, specifically can comprise:
Adjustment judges submodule, the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold is there is for judging whether, if, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistics submodule, the initial mark of described adjacent area to be adjusted is not for adjust, and current adjustment number of times is 0;
Statistics submodule, for adding up all adjacent areas to be adjusted;
Adjustment submodule, arbitrary for selecting from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark submodule, for the adjacent area of carrying out parameter adjustment, is revised as adjusted by its mark;
Mark judges submodule, for the mark according to adjacent area to be adjusted, judges whether there is adjusted adjacent area in the adjacent area to be adjusted added up, if so, then triggers described adjustment and judge submodule, otherwise holds the described iteration of triggering and judge submodule;
Iteration judges submodule, for judging whether current adjustment number of times reaches iterations, if so, then triggering described adjustment and judging submodule, otherwise triggering described statistics submodule.
In one preferred embodiment of the invention, described adjacent area parameter adjustment module 206, specifically can comprise:
Descending submodule, for carrying out descending to the co-channel interference weight of all adjacent areas to this current area; And
Priority parameters adjustment submodule, for preferential to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Above to optimization method and the device of a kind of many adjacent areas interference provided by the present invention, be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (16)
1. an optimization method for the interference of adjacent area more than, is characterized in that, comprising:
Gather existing network data and drive test data;
According to the whole network cell list and geographic information data, obtain cell edge region;
For current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
For current area, obtain the received power of its adjacent area according to described drive test data and its cell edge region;
For current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtain the co-channel interference weight of its adjacent area to this current area;
When corresponding coverage threshold being exceeded to the co-channel interference weight of this current area in adjacent area, the parameter of this adjacent area is adjusted.
2. the method for claim 1, is characterized in that, described existing network data comprises network configuration data and the call log data of network element;
Then described for current area, obtain the step of the same time-frequency resource quantity of its adjacent area according to described existing network data, comprising:
According to the network configuration data of described network element, obtain current area and the DRS (Dedicated Reference Signal) CRS of adjacent area thereof and the physical resource mapping position of control channel;
According to described call log data, obtain the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
According to current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtain the CRS of its adjacent area and the same time-frequency resource quantity of control channel;
The running time-frequency resource position of the Traffic Channel of foundation current area and adjacent area thereof, obtains the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
3. method as claimed in claim 1 or 2, is characterized in that, described when exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, to the step that the parameter of this adjacent area adjusts, at least comprise in following adjustment one or more:
Adjust the Physical Cell Identifier of this adjacent area, adjust the antenna parameter of this adjacent area, and, adjust the power of this adjacent area.
4. the method for claim 1, is characterized in that, described when exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, to the step that the parameter of this adjacent area adjusts, comprising:
Parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.
5. method as claimed in claim 3, it is characterized in that, the step of the antenna parameter of described this adjacent area of adjustment, comprising: the Downtilt increasing this adjacent area, and/or, reduce the antenna height of this adjacent area.
6. method as claimed in claim 3, it is characterized in that, the step of the power of described this adjacent area of adjustment, comprising:
When corresponding coverage threshold being exceeded to the CRS co-channel interference weight of this current area in adjacent area, lower the CRS power of this adjacent area;
When corresponding coverage threshold being exceeded to the control channel co-channel interference weight of this current area in adjacent area, lower the control channel power of this adjacent area;
In adjacent area, corresponding coverage threshold is exceeded to the Traffic Channel co-channel interference weight of this current area, and when coordinating district interference ICIC switch cuts out, lower the service channel power of this adjacent area.
7. the method for claim 1, is characterized in that, described when exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, to the step that the parameter of this adjacent area adjusts, comprising:
Adjustment determining step: judge whether to there is the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold, if so, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistic procedure, the initial mark of described adjacent area to be adjusted is not for adjust, and current adjustment number of times is 0;
Statistic procedure: add up all adjacent areas to be adjusted;
Set-up procedure: select arbitrary from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark step: to the adjacent area of carrying out parameter adjustment, its mark is revised as adjusted;
Mark determining step: according to the mark of adjacent area to be adjusted, judges whether there is adjusted adjacent area in the adjacent area to be adjusted added up, and if so, then returns and performs adjustment determining step, otherwise perform iteration determining step;
Iteration determining step; Judge whether current adjustment number of times reaches iterations, if so, then return and perform adjustment determining step, otherwise return execution statistic procedure.
8. the method for claim 1, is characterized in that, described when exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, to the step that the parameter of this adjacent area adjusts, comprising:
Descending is carried out to the co-channel interference weight of all adjacent areas to this current area;
Preferentially to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
9. an optimization device for the interference of adjacent area more than, is characterized in that, comprising:
Acquisition module, for gathering existing network data and drive test data;
Cell edge region acquisition module, for according to the whole network cell list and geographic information data, obtains cell edge region;
With time-frequency resource quantity acquisition module, for for current area, obtain the same time-frequency resource quantity of its adjacent area according to described existing network data; The same running time-frequency resource of described adjacent area is the running time-frequency resource that the physical resource of adjacent area maps adjacent area when mapping identical with the physical resource of this current area;
Received power acquisition module, for for current area, obtains the received power of its adjacent area according to described drive test data and its cell edge region;
Co-channel interference Weight Acquisition module, for for current area, according to same time-frequency resource quantity and the received power of its adjacent area, obtains the co-channel interference weight of its adjacent area to this current area; And
Adjacent area parameter adjustment module, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the parameter of this adjacent area.
10. device as claimed in claim 9, it is characterized in that, described existing network data comprises network configuration data and the call log data of network element;
Then described same time-frequency resource quantity acquisition module comprises:
RE mapping position obtains submodule, for the network configuration data according to described network element, obtains current area and the DRS (Dedicated Reference Signal) CRS of adjacent area thereof and the physical resource mapping position of control channel;
Running time-frequency resource position acquisition submodule, for according to described call log data, obtains the running time-frequency resource position of the Traffic Channel of current area and adjacent area thereof;
First obtains submodule with time-frequency resource quantity, for according to current area and the CRS of adjacent area thereof and the physical resource mapping position of control channel, obtains the CRS of its adjacent area and the same time-frequency resource quantity of control channel; And
Second obtains submodule with time-frequency resource quantity, for the running time-frequency resource position of the Traffic Channel according to current area and adjacent area thereof, obtains the same time-frequency resource quantity of the Traffic Channel of its adjacent area.
11. devices as described in claim 9 or 10, is characterized in that, described adjacent area parameter adjustment module, at least comprise one or more in following adjustment submodule:
PCI adjusts submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the Physical Cell Identifier of this adjacent area;
Tested rotating platform submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the antenna parameter of this adjacent area; And
Power adjustment submodule, during for exceeding corresponding coverage threshold in adjacent area to the co-channel interference weight of this current area, adjusts the power of this adjacent area.
12. devices as claimed in claim 9, it is characterized in that, described adjacent area parameter adjustment module, comprising:
Work order issues submodule, for parameter adjustment work order is issued to existing network, is adjusted according to the parameter of described parameter adjustment work order to this adjacent area by existing network.
13. devices as claimed in claim 11, is characterized in that, described tested rotating platform submodule, specifically for increasing the Downtilt of this adjacent area, and/or, reduce the antenna height of this adjacent area.
14. devices as claimed in claim 11, is characterized in that, described power adjustment submodule comprises:
Signal power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the CRS co-channel interference weight of this current area, lowers the CRS power of this adjacent area;
Control channel power adjustment unit, during for exceeding corresponding coverage threshold in adjacent area to the control channel co-channel interference weight of this current area, lowers the control channel power of this adjacent area;
Service channel power adjustment unit, for exceeding corresponding coverage threshold in adjacent area to the Traffic Channel co-channel interference weight of this current area, and when coordinating district interference ICIC switch cuts out, lowers the service channel power of this adjacent area.
15. devices as claimed in claim 9, it is characterized in that, described adjacent area parameter adjustment module, comprising:
Adjustment judges submodule, the adjacent area co-channel interference weight of this current area being exceeded to corresponding coverage threshold is there is for judging whether, if, then using corresponding adjacent area as adjacent area to be adjusted, and perform statistics submodule, the initial mark of described adjacent area to be adjusted is not for adjust, and current adjustment number of times is 0;
Statistics submodule, for adding up all adjacent areas to be adjusted;
Adjustment submodule, arbitrary for selecting from added up adjacent area to be adjusted, and according to its co-channel interference weight to this current area, parameter adjustment is carried out to it;
Mark submodule, for the adjacent area of carrying out parameter adjustment, is revised as adjusted by its mark;
Mark judges submodule, for the mark according to adjacent area to be adjusted, judge whether there is adjusted adjacent area in the adjacent area to be adjusted added up, if so, then trigger described adjustment and judge submodule, otherwise triggering iteration judges submodule;
Iteration judges submodule, for judging whether current adjustment number of times reaches iterations, if so, then triggering described adjustment and judging submodule, otherwise triggering described statistics submodule.
16. devices as claimed in claim 9, it is characterized in that, described adjacent area parameter adjustment module, comprising:
Descending submodule, for carrying out descending to the co-channel interference weight of all adjacent areas to this current area; And
Priority parameters adjustment submodule, for preferential to coming adjusting the parameter that the co-channel interference weight of this current area exceedes the adjacent area of corresponding coverage threshold above.
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| CN104519505B (en) * | 2013-09-27 | 2018-07-24 | 中国电信股份有限公司 | The method optimized to up-link capacity and covering and base station |
| CN104602248B (en) * | 2013-11-01 | 2018-09-07 | 中国移动通信集团设计院有限公司 | A kind of method and network of assessment Physical Cell Identifier |
| CA2932945C (en) * | 2013-12-13 | 2021-02-23 | Huawei Technologies Co., Ltd. | Interference coordination method, apparatus, and system |
| CN105052186B (en) * | 2013-12-24 | 2019-05-07 | 华为技术有限公司 | A kind of method and device obtaining interference value |
| CN104168586B (en) * | 2014-08-06 | 2018-04-27 | 武汉虹信技术服务有限责任公司 | Interference investigation method and device between a kind of LTE nets |
| CN106714189B (en) * | 2015-11-13 | 2020-02-21 | 中国移动通信集团广东有限公司 | Method and device for analyzing cell over coverage |
| CN107404729A (en) * | 2016-05-18 | 2017-11-28 | 中兴通讯股份有限公司 | sector conversion method, base station, network element and communication system |
| CN108260146A (en) * | 2018-01-24 | 2018-07-06 | 深圳市科虹通信有限公司 | A kind of method and its system based on the optimization of interference matrix double-flow design |
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