CN104519505B - The method optimized to up-link capacity and covering and base station - Google Patents

The method optimized to up-link capacity and covering and base station Download PDF

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Publication number
CN104519505B
CN104519505B CN201310447308.6A CN201310447308A CN104519505B CN 104519505 B CN104519505 B CN 104519505B CN 201310447308 A CN201310447308 A CN 201310447308A CN 104519505 B CN104519505 B CN 104519505B
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China
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uplink
scheduled
inclination angle
power
parameter
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CN201310447308.6A
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Chinese (zh)
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CN104519505A (en
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许森
孙震强
朱彩勤
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中国电信股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18Network planning tools
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition

Abstract

The present invention discloses a kind of to up-link capacity and the method that optimizes of covering and base station.Wherein include with the method optimized is covered to up-link capacity:According to periodically collected business information, judge whether the covering index of current area and/or capacity performance index reach scheduled target call.If not reaching scheduled target call, further judge within the scope of scheduled cell uplink vertical dip angle, if there are target-angles.If there are target-angle, cell configuration is carried out using target-angle and current area ascending power parameter;Otherwise being sent to adjacent cell base station reduces uplink transmission power request, and the covering index and capacity performance index that the interference will pass through adjacent cell reduces to realize current area reach scheduled target call.To make the LTE cells of configuration active antenna that this cell be made to reach desired covering and capacity goals in different interference environments, and the uplink interference to adjacent area is reduced, to improve the service quality of whole network up direction.

Description

The method optimized to up-link capacity and covering and base station

Technical field

The present invention relates to the communications field, more particularly to a kind of method that up-link capacity and covering are optimized and base station.

Background technology

LTE(Long Term Evolution, long term evolution)The system interference-limited as one, up direction Covering is generally limited by load and interference level, uplink power control parameter setting, station spacing and the antenna of adjacent area with capacity The factors such as angle of declination.In order to effectively optimize covering and the volumetric properties in LTE network, artificial degree of participation is reduced, from 3GPP(The 3rd Generation Partnership Project, third generation partner program)The R9 stages start to introduce Self-optimization techniques, CCO(Capacity and Coverage Optimization, capacity and coverage self-optimization)It is therein One important research use-case.And active antenna has dynamic cell division/merging, wave beam shape as a kind of new antenna configurations The new features such as adaptive, the uplink and downlink independence inclination angle setting of shape, thus in the research of 3GPP R12 for active antenna from group Knit research(AAS(Active Antenna System, active antenna system)for SON(Self Organization Network, self-organizing network))It is a new research hotspot.After introducing LTE, there are a variety of coverage areas in network, Power grade(Pico, Femto, Relay etc.)Base station, therefore how to allow in complicated network environment each base station autonomous Optimize its covering and volumetric properties, ensures the business experience of user and the capacity of maximization network, will be operator and instrument factory One important project of family's research.

During standard discussion and in existing 2G/3G networks, the covering of up direction and the optimization of capacity are logical Normal method has the angle of declination of adjustment antenna and the power configuration parameter of uplink, but these methods are asked there is also certain Topic:

The adjustment of Downtilt can lead to the variation of cell coverage area, and cooperation is used between especially multiple cells The method that mode carries out angle of declination adjustment is not only easy to cause the presence of weak overlay area, and may be small to being currently resident in User and adjacent cell user in area generate downlink interference, deteriorate so as to cause network performance.

Since the interference feature of up-downlink direction is different, the adjustment nothing that traditional passive antenna passes through angle of declination Method ensures uplink and downlink direction simultaneously while reaching the optimal of covering and/or volumetric properties.

Uplink power control parameter also has important influence, the ring opening moiety table of uplink power control for covering and capacity It is shown as:

PPUSCH=min{PCMAX,10log10(MPUSCH)+P0+ α PL },

Wherein cell-level parameter alpha is mainly used for the part compensation to path loss, which mainly controls edge and central user Equilibrium relation, and P0Setting be usually directed to the IOT in region(Interference Over Thermal, dry ratio of making an uproar)With The transmission power of intra-cell users promotes cell parameter P0Terminal user can be increased in each PRB(Physical Resource Block, Physical Resource Block)On PSD(Power Spectral Density, power spectral density), but simultaneously The interference to adjacent area is also increased, IOT in network, therefore simple raising P are improved0Covering and capacity can not be made to obtain It improves.Parameter PCMAXThe expression maximum transmission power of terminal, and MPUSCHThe quantity of the PRB of the user is distributed in expression.

It usually needs to be arranged a set of unified ascending power parameter for a panel region in planning or emulation, but due to Site spacing is inconsistent during actual deployment, and service distribution not only there is tidal effect also to have difference geographically, therefore area An individual P is not present in domain0All cells can be made to be attained by the optimal of covering and capacity.

Invention content

An embodiment of the present invention provides a kind of method optimized to up-link capacity and covering and base stations, keep configuration active The LTE cells of antenna make this cell reach desired covering and capacity goals in different interference environments, and reduce to neighbour The uplink interference in area, to improve the service quality of whole network up direction.

According to an aspect of the present invention, a kind of method optimized to up-link capacity and covering is provided, including:

Periodically acquire the business information of current area;

According to collected business information, judge whether the covering index of current area and/or capacity performance index reach predetermined Target call;

If the covering index and/or capacity performance index of current area do not reach scheduled target call, further judge Within the scope of scheduled cell uplink vertical dip angle, if there are target-angles;Wherein on target-angle and current area When row power parameter carries out cell configuration, the covering index and capacity performance index of current area reach scheduled target call;

If there are target-angle, cell configuration is carried out using target-angle and current area ascending power parameter;

If target-angle is not present, being sent to adjacent cell base station reduces uplink transmission power request, adjacent small will pass through The covering index and capacity performance index that the interference in area reduces to realize current area reach scheduled target call.

Preferably, judge within the scope of scheduled cell uplink vertical dip angle, if there are the step of target-angle to include:

The current uplink vertical dip angle for estimating each terminal in current area, using the uplink as progress uplink inclination angle estimation Inclination angle estimated value;

Uplink inclination angle estimated value is updated using predetermined inclination increment size;If current area only capacity performance index does not reach To scheduled target call, then uplink inclination angle estimated value is increased into predetermined inclination increment size;Otherwise, uplink inclination angle estimated value is subtracted Remove predetermined inclination increment size;

Judge uplink inclination angle estimated value whether within the scope of scheduled cell uplink vertical dip angle;

If uplink inclination angle estimated value is within the scope of scheduled cell uplink vertical dip angle, further judge upper in utilization Under conditions of row inclination angle estimated value and current area ascending power parameter are configured, the covering index and capacity of current area refer to Whether mark reaches scheduled target call;

If the covering index and capacity performance index of current area reach scheduled target call, by uplink inclination angle estimated value As target-angle, the step of carrying out cell configuration using target-angle and current area ascending power parameter is executed;

If the covering index and/or capacity performance index of current area are not up to scheduled target call, execute using predetermined The step of inclination angle increment size is updated uplink inclination angle estimated value.

Preferably, it if uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, executes to adjacent small Area base station sends the step of reducing uplink transmission power request.

Preferably, if uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, further include:

Current area ascending power parameter is extracted, to estimate parameter as power;

Power estimation parameter is increased into scheduled power increment, to be updated to power estimation parameter;

Judge whether power estimation parameter exceeds scheduled power bracket;

If power estimates that uplink inclination angle estimated value without departing from scheduled power bracket, is reset to current area by parameter The current uplink vertical dip angle of interior each terminal estimates that parameter and uplink inclination angle estimated value carry out cell configuration, so using power After execute the step of being updated to uplink inclination angle estimated value using predetermined inclination increment size;

If power estimates that parameter exceeds scheduled power bracket, executing to send to adjacent cell base station reduces uplink transmitting work( The step of rate is asked.

Preferably, include the step of the current uplink vertical dip angle of each terminal in estimation current area:

Utilize difference of the active antenna when different uplink vertical dip angles are arranged between corresponding active antenna gain, estimation The current uplink vertical dip angle of each terminal in current area.

Preferably, it is sent to adjacent cell base station after reducing the step of uplink transmission power is asked, further includes:

Judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request;

If all adjacent cell base stations all refuse to reduce uplink transmission power request, optimization is reported unsuccessfully to believe to management station Breath.

Preferably, after the step of periodically acquiring the business information of current area, further include:

According to collected business information, judge whether current cell load is more than scheduled load-threshold;

If current cell load is more than scheduled load-threshold, load balance process is carried out;

If current cell load is not more than scheduled load-threshold, executes according to collected business information, judge to work as The step of whether the covering index and/or capacity performance index of preceding cell reach scheduled target call.

Preferably, the above method further includes:

When receive adjacent cell transmission reduction uplink transmission power request when, judge current area covering index and/ Or whether capacity performance index reaches scheduled target call;

If the covering index and capacity performance index of current area reach scheduled target call, the upper of current area is extracted Row power parameter;

Ascending power parameter is subtracted into scheduled power difference, estimates parameter to obtain ascending power;

Judge that ascending power estimates parameter whether in scheduled power bracket;

If ascending power estimates that parameter in scheduled power bracket, judges within the scope of scheduled uplink vertical dip angle With the presence or absence of candidate inclination angle, wherein when carrying out cell configuration with candidate inclination angle and ascending power estimation parameter, current area Covering index and capacity performance index reach scheduled target call;

If there is candidate inclination angle, select the candidate inclination angle of numerical value minimum as optimal inclination angle;

Cell configuration is carried out using optimal inclination angle and ascending power estimation parameter.

Preferably, if there is no candidate inclination angle, refuse to reduce uplink transmission power request;

If ascending power estimates parameter not in scheduled power bracket, refuse to reduce uplink transmission power request;

The covering index and/or capacity performance index of current area fail to reach scheduled target call, then refuse to reduce uplink Transmission power request.

Preferably, when receiving the reduction uplink transmission power request of adjacent cell transmission, further include:

Judge whether current cell load is more than scheduled load-threshold;

If current cell load is more than scheduled load-threshold, refuse to reduce uplink transmission power request;

If current cell load be not more than scheduled load-threshold, execute the covering index for judging current area and/or The step of whether capacity performance index reaches scheduled target call.

According to another aspect of the present invention, a kind of base station optimized to up-link capacity and covering, including acquisition are provided Unit, the first recognition unit, the second recognition unit, dispensing unit and transmission unit, wherein:

Collecting unit, the business information for periodically acquiring current area;

First recognition unit, for according to collected business information, judging the covering index and/or capacity of current area Whether index reaches scheduled target call;

Second recognition unit, for according to the judging result of the first recognition unit, if the covering index of current area and/or Capacity performance index does not reach scheduled target call, then further judges within the scope of scheduled cell uplink vertical dip angle, be It is no that there are target-angles;Wherein when carrying out cell configuration with target-angle and current area ascending power parameter, current area Covering index and capacity performance index reach scheduled target call;

If dispensing unit, there are target-angle, utilizes target-angle for the judging result according to the second recognition unit Cell configuration is carried out with current area ascending power parameter;

Transmission unit, for the judging result according to the second recognition unit, if target-angle is not present, to adjacent cell base Stand transmission reduce uplink transmission power request, with will pass through adjacent cell interference reduce realize current area covering index and Capacity performance index reaches scheduled target call.

Preferably, the second recognition unit includes that estimation module, inclination angle update module, the first judgment module and second judge mould Block, wherein:

Estimation module, the current uplink vertical dip angle for estimating each terminal in current area, using as carry out uplink The uplink inclination angle estimated value of inclination angle estimation;

Inclination angle update module, for being updated to uplink inclination angle estimated value using predetermined inclination increment size;If current small Area's only capacity performance index does not reach scheduled target call, then uplink inclination angle estimated value is increased predetermined inclination increment size;Otherwise, Uplink inclination angle estimated value is subtracted into predetermined inclination increment size;

First judgment module, for judging whether uplink inclination angle estimated value is in scheduled cell uplink vertical dip angle range It is interior;

Second judgment module, for the judging result according to the first judgment module, if uplink inclination angle estimated value is in predetermined Cell uplink vertical dip angle within the scope of, then further judge using uplink inclination angle estimated value and current area ascending power ginseng Under conditions of number is configured, whether the covering index and capacity performance index of current area reach scheduled target call;If working as The covering index and capacity performance index of preceding cell reach scheduled target call, then incline using uplink inclination angle estimated value as target Angle, instruction dispensing unit execute the operation that cell configuration is carried out using target-angle and current area ascending power parameter;If working as The covering index and/or capacity performance index of preceding cell are not up to scheduled target call, it indicates that inclination angle update module executes utilization The operation that predetermined inclination increment size is updated uplink inclination angle estimated value.

Preferably, the first judgment module is additionally operable to be in scheduled cell uplink vertical dip angle model in uplink inclination angle estimated value When enclosing outer, instruction transmission unit executes the operation for being sent to adjacent cell base station and reducing uplink transmission power and asking.

Preferably, the second recognition unit further includes extraction module, power update module, third judgment module and configuration mould Block, wherein:

Extraction module, for judging that uplink inclination angle estimated value is in scheduled cell uplink and vertically inclines in the first judgment module When outside angular region, current area ascending power parameter is extracted, to estimate parameter as power;

Power update module, for power estimation parameter to be increased scheduled power increment, with to power estimate parameter into Row update;

Third judgment module, for judging whether power estimation parameter exceeds scheduled power bracket;If power estimation ginseng Number exceeds scheduled power bracket, it indicates that transmission unit, which executes to send to adjacent cell base station, reduces what uplink transmission power was asked Operation;

Configuration module, for the judging result according to third judgment module, if power estimates parameter without departing from scheduled Uplink inclination angle estimated value is then reset to the current uplink vertical dip angle of each terminal in current area, utilizes work(by power bracket Rate estimates that parameter and uplink inclination angle estimated value carry out cell configuration, then indicates that inclination angle update module is executed and is increased using predetermined inclination The operation that magnitude is updated uplink inclination angle estimated value.

Preferably, estimation module specifically utilizes active antenna corresponding active antenna when different uplink vertical dip angles are arranged Difference between gain estimates the current uplink vertical dip angle of each terminal in current area.

Preferably, above-mentioned base station further includes request results recognition unit, wherein:

Request results recognition unit reduces what uplink transmission power was asked for being sent to adjacent cell base station in transmission unit After step, judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request;If all adjacent cell bases All refusals of standing reduce uplink transmission power request, it indicates that transmission unit reports optimization failure information to management station.

Preferably, above-mentioned base station further includes third recognition unit and equilibrium treatment unit, wherein:

Third recognition unit, for according to the collected business information of collecting unit, judging whether current cell load is big In scheduled load-threshold;If current cell load is not more than scheduled load-threshold, it indicates that the first recognition unit executes root According to collected business information, judge whether the covering index of current area and/or capacity performance index reach scheduled target call Operation;

Equilibrium treatment unit, for the judging result according to third recognition unit, if current cell load is more than scheduled Load-threshold then carries out load balance process.

Preferably, above-mentioned base station further includes receiving unit, the 4th recognition unit, parameter extraction unit, power parameter estimation Unit, the 5th recognition unit, the 6th recognition unit and inclination angle selecting unit, wherein:

Receiving unit, the reduction uplink transmission power request for receiving adjacent cell transmission;

4th recognition unit, when the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit is asked, Whether the covering index and/or capacity performance index for judging current area reach scheduled target call;

Parameter extraction unit, for the judging result according to the 4th recognition unit, if the covering index and appearance of current area Figureofmerit reaches scheduled target call, then extracts the ascending power parameter of current area;

Power parameter estimation unit, for ascending power parameter to be subtracted scheduled power difference, to obtain ascending power Estimate parameter;

5th recognition unit, for judging that ascending power estimates parameter whether in scheduled power bracket;

6th recognition unit, for the judging result according to the 5th recognition unit, if ascending power estimates parameter predetermined Power bracket in, then judge with the presence or absence of candidate inclination angle within the scope of scheduled uplink vertical dip angle, wherein inclining when with candidate When angle and ascending power estimation parameter carry out cell configuration, the covering index and capacity performance index of current area reach scheduled mesh Mark requires;

Inclination angle selecting unit, if there is candidate inclination angle, selects numerical value for the judging result according to the 6th recognition unit Minimum candidate inclination angle is as optimal inclination angle;Then instruction dispensing unit is carried out using optimal inclination angle and ascending power estimation parameter Cell configures.

Preferably, the 6th recognition unit is additionally operable to when there is no candidate inclination angle, and refusal reduces uplink transmission power request;

5th recognition unit is additionally operable to when ascending power estimates parameter not in scheduled power bracket, in refusal reduction Row transmission power request;

4th recognition unit is additionally operable to the covering index of current area and/or capacity performance index fails to reach scheduled target and wants When asking, refusal reduces uplink transmission power request.

Preferably, above-mentioned base station further includes the 7th recognition unit, wherein:

7th recognition unit, when the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit is asked, Judge whether current cell load is more than scheduled load-threshold;If current cell load is more than scheduled load-threshold, refuse Uplink transmission power request is reduced absolutely;If current cell load is not more than scheduled load-threshold, it indicates that the 4th recognition unit Execution judges whether the covering index of current area and/or capacity performance index reach the operation of scheduled target call.

Whether the present invention reaches scheduled mesh by the covering index and/or capacity performance index for periodically judging current area Mark requires, if the covering index and/or capacity performance index of current area do not reach scheduled target call, further judges Within the scope of scheduled cell uplink vertical dip angle, if there are target-angles to meet covering and capacity requirement.If there are targets Inclination angle then carries out cell configuration using target-angle and current area ascending power parameter, if target-angle is not present, to neighbour Cell base station, which is sent, reduces uplink transmission power request, and the interference will pass through adjacent cell reduces to realize the covering of current area Index and capacity performance index reach scheduled target call.To make the LTE cells of configuration active antenna in different interference environments In so that this cell is reached desired covering and capacity goals, and the uplink interference to adjacent area is reduced, to improve whole network The service quality of up direction.

Description of the drawings

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art With obtain other attached drawings according to these attached drawings.

Fig. 1 is the schematic diagram that the present invention optimizes up-link capacity and covering one embodiment.

Fig. 2 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.

Fig. 3 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.

Fig. 4 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.

Fig. 5 is the schematic diagram of base station one embodiment of the present invention.

Fig. 6 is the schematic diagram of second recognition unit one embodiment of the invention.

Fig. 7 is the schematic diagram of another embodiment of the second recognition unit of the invention.

Fig. 8 is the schematic diagram of another embodiment in base station of the present invention.

Fig. 9 is the schematic diagram of architecture of base station one embodiment of the present invention.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, shall fall within the protection scope of the present invention.

Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.

Simultaneously, it should be appreciated that for ease of description, the size of attached various pieces shown in the drawings is not according to reality Proportionate relationship draw.

Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as authorizing part of specification.

In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.

It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.

Fig. 1 is the schematic diagram that the present invention optimizes up-link capacity and covering one embodiment.Preferably, the present embodiment Method and step can be executed by the base station in current area.

Step 101, the business information of current area is periodically acquired.

Preferably, base station is according to management station OAM(Operation Administration and Maintenance, behaviour It manages and safeguards)In the period of configuration, count all users and uplink carrying information in the period, these information include but unlimited In following content:

The active service rate each carried

The QCI each carried(QoS Class Identifier, QoS class letters)

The PBR each carried(Prioritized Bit Rate, preferential stage speed)

The average MCS each carried(Modulation Coding Scheme, Modulation and Coding Scheme)

Each average PRB of carrying occupies number

The average PHR of the user(Power Headroom Report PHR, power headroom reporting)

Whether be central user carrying

Ascending load capacity information " Composite Available Capacity Group "

The active service rate wherein each carried reflects practical the case where being serviced of the carrying, and OAM needs are Different expected rates is arranged in the QCI and PBR each carried, wherein for GBR(Guaranteed Bit Rate ensure bit Rate)Its expected rate of business is equal to GBR rates, for NGBR(Non-Guaranteed Bit Rate, non-guaranteed bit Rate)Business needs to embody the expectation use of user according to different expected rates is provided for different QCI and PBR settings Impression, if the active service rate of some business is not less than expected rate Threshqci,pbr, then it is assumed that the service-user is full Meaning, otherwise it is assumed that dissatisfied.The average MCS often carried reflects the reception SINR on real resource block(Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio)And interference, for subsequent resource occupation Assessment.The average PRB each carried occupies number and average PHR reports the PSD reflected on actual each resource block (Power Spectral Density, power spectral density), and the gain of path loss and antenna is reflected indirectly.Central user is sentenced It is disconnected the methods of such as based on the proprietary measurement report of base station configuration judge there are many mode, the judgment method not Patent it is involved within the scope of.

Wherein it should be noted that in LTE system, the statistics generally use PRB utilization rates of resource are weighed, still In view of certain NGBR business such as FTP(File Transfer Protocol, File Transfer Protocol)Business can take up all PRB resources, and system still can access other users at this time, therefore in adjacent cell in the research of 3GPP R9 SON Load interactive process in, increase a new statistic " Composite Available Capacity Group ", should Statistic is independently completed to count by base station, has considered GBR, NGBR and other resources such as TNL in the cell (Transport Network Layer, transport network layer), after the resources such as hardware, the comprehensive remaining usable levels provided, the statistics As a result two parameters of uplink and downlink are contained.Reflect the available resources of cell real surplus.

Step 102, according to collected business information, judge current area covering index and/or capacity performance index whether Reach scheduled target call.

Preferably, if the satisfaction rate of all carryings is more than pre-determined threshold T1 in cell, then it is assumed that capacity performance index meets need It asks, otherwise it is assumed that capacity performance index needs to optimize, the statistical method for covering satisfaction rate mainly only counts the user's in edge Whether carrying satisfaction rate reaches default desired value T2, thinks to cover index meet demand if reaching desired value, otherwise it is assumed that covering Lid index needs to optimize.

Step 103, if the covering index and/or capacity performance index of current area do not reach scheduled target call, into One step judges within the scope of scheduled cell uplink vertical dip angle, if there are target-angles.Wherein when with target-angle and working as When preceding cell uplink power parameter carries out cell configuration, the covering index and capacity performance index of current area reach scheduled target It is required that.

Step 104, it if there are target-angle, carries out cell using target-angle and current area ascending power parameter and matches It sets.

Step 105, if target-angle is not present, being sent to adjacent cell base station reduces uplink transmission power request, so as to The covering index and capacity performance index reduced by the interference of adjacent cell to realize current area reaches scheduled target call.

Based on the method optimized to up-link capacity and covering that the above embodiment of the present invention provides, make the active day of configuration The LTE cells of line make this cell reach desired covering and capacity goals in different interference environments, and reduce to adjacent area Uplink interference, to improve the service quality of whole network up direction.

Preferably, it is sent to adjacent cell base station after reducing the step of uplink transmission power is asked, further includes:

Judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request.If all adjacent cell base stations All refusal reduces uplink transmission power request, then reports optimization failure information to management station.

Preferably, it is above-mentioned periodically acquisition current area business information the step of after, further include:

According to collected business information, judge whether current cell load is more than scheduled load-threshold.If current small Area's load is more than scheduled load-threshold, then carries out load balance process.If current cell load is not more than scheduled load door Limit then executes according to collected business information, judges whether the covering index of current area and/or capacity performance index reach predetermined Target call the step of.

I.e. when cell is in high load capacity or overload, base station should trigger corresponding load balancing or congestion control, should Process is not unfolded to illustrate here not within the scope that the present invention relates to.

Fig. 2 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.With embodiment illustrated in fig. 1 It compares, in the embodiment depicted in figure 2, further to judging whether target-angle within the scope of scheduled uplink vertical dip angle The step of carried out specific restriction.

Step 201, the business information of current area is periodically acquired.

Step 202, according to collected business information, judge current area covering index and/or capacity performance index whether Reach scheduled target call.

If the covering index and capacity performance index of wherein current area reach scheduled target call, without referring to covering Mark and capacity performance index optimize.

Step 203, if the covering index and/or capacity performance index of current area do not reach scheduled target call, estimation The current uplink vertical dip angle of each terminal in current area, using the uplink inclination angle estimated value as progress uplink inclination angle estimation.

Preferably, the difference using active antenna when different uplink vertical dip angles are arranged between corresponding active antenna gain Value estimates the current uplink vertical dip angle of each terminal in current area.

For example, if the uplink and downlink inclination angle in current area is inconsistent, estimate that downlink path loss and antenna increase according to PHR Benefit:

Estimate uplink path loss and antenna gain according to the uplink signal strength of base station reception:

PLul=Pmax-PHR-RxeNodeB

Since circuit loss value contains both horizontally and vertically the sum of gain of the path loss and antenna of large scale, uplink and downlink Difference is only that the gain of vertical direction.Wherein RxeNodeBIndicate the power that base station receives.Assuming that active antenna is in Vertical Square To directional diagram be f (θ, φtilt), wherein θ be terminal user vertically to arrival inclination angle, and φtiltIndicate the vertical of antenna Angle of declination, and the gain inequality of directional diagram of the terminal user between two inclination angles can be written as F (θ, Δ φ)=f (θ+Δ φ)-f (θ), therefore estimated values theta=F of terminal is obtained according to the difference of path loss gain-1(PLdl-PLul, Δ φ), if in current system Uplink and downlink inclination angle is consistent, then can be one amplitude of uplink Inclination maneuver of antenna, then counts and receive the same subscriber signal increasing Beneficial difference, method is consistent when method is identical as the setting of uplink and downlink inclination angle.

What needs to be explained here is that the standard of 3GPP active antennas is proposed by Huawei in RAN#53 meeting of 3GPP And SI (Study Item, research project) project verifications are completed, relatively previous passive antenna generally employs in active antenna system 3D antenna models are assessed, and the gain of antenna contains two parts of horizontal direction and vertical direction, wherein in a 3D Horizontal direction gain is expressed as in antenna model:

WhereinAmIndicate the front and back than gain of antenna,Indicate arriving signal horizontal plane and horizontal direction most Angle between large gain angle.And the vertical gain model of antenna is:

Wherein SLAv=30dB, the value indicate that side-lobes power grade, θ indicate arriving signal in vertical plane and vertical square To angle between maximum gain angle.

Due to skilled in the art realises that how to calculate antenna gain, not being unfolded to illustrate here.

Step 204, uplink inclination angle estimated value is updated using predetermined inclination increment size.If current area only capacity refers to Mark does not reach scheduled target call, then uplink inclination angle estimated value is increased predetermined inclination increment size;Otherwise, by uplink inclination angle Estimated value subtracts predetermined inclination increment size.

That is, if there is only capacity problems, it tries solved the problems, such as by increasing uplink inclination angle.Otherwise, it attempts to pass through drop Low uplink inclination angle solves the problems, such as.

Step 205, judge uplink inclination angle estimated value whether within the scope of scheduled cell uplink vertical dip angle.

That is, value range [θ of the range of adjustment no more than the OAM cell uplink vertical dip angles configuredmin, θmax].If uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, 206 are thened follow the steps;If uplink is inclined Angular estimation value is within the scope of scheduled cell uplink vertical dip angle, thens follow the steps 209.

Step 206, being sent to adjacent cell base station reduces uplink transmission power request.

Step 207, judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request.

Step 208, uplink transmission power request is reduced if all adjacent cell base stations are all refused, is reported to management station excellent Change failure information.Later, other steps of the present embodiment are no longer executed.

Step 209, further judge to be configured using uplink inclination angle estimated value and current area ascending power parameter Under conditions of, whether the covering index and capacity performance index of current area reach scheduled target call.

For some target uplink inclination angle thetaestimate, all GBR traffics θ under the inclination angle is estimated firstestimate, phase Estimate that required PRB is provided than the gain of SINR of the currently used uplink inclination angle on former resource block, and according to expected rate Source is followed successively by NGBR business according to QCI grades and carries out resource allocation until institute according to its expected rate value if resource has residue Have that resource allocation finishes or all users are assigned to resource to reach satisfied rate desired value.

If the covering index and/or capacity performance index of current area are not up to scheduled target call, return to step 204. If the covering index and capacity performance index of current area reach scheduled target call, 210 are thened follow the steps.

Step 210, using uplink inclination angle estimated value as target-angle, joined using target-angle and current area ascending power Number carries out cell configuration and carries out cell configuration.

Fig. 3 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.With embodiment illustrated in fig. 2 It compares, in the embodiment shown in fig. 3, when step 205 judges that uplink inclination angle estimated value is in scheduled cell uplink vertical dip angle When outside range, by the processing of step 301-304, further attempt to optimize up-link capacity and covering.Due to Fig. 3 and figure The identical step content of reference numeral is identical in 2, therefore same section is not repeated.

Step 301, the ascending power parameter for extracting current area, to estimate parameter as power.

Step 302, power estimation parameter is increased into scheduled power increment, to be updated to power estimation parameter.

Step 303, judge whether power estimation parameter exceeds scheduled power bracket.If power estimates parameter beyond predetermined Power bracket, then follow the steps 206;If power estimates that parameter without departing from scheduled power bracket, thens follow the steps 304.

Step 304, uplink inclination angle estimated value is reset to the current uplink vertical dip angle of each terminal in current area, profit Estimate that parameter and uplink inclination angle estimated value carry out cell configuration with power, then executes step 204.

As a result, when step 205 judges that uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, into One step further attempts to by adjusting power estimation parameter.

The optimization processing of the covering and capacity problem triggering because of itself is described in the above embodiments.It is described below The optimization processing that request is sent by adjacent cell and is triggered.

Fig. 4 is the schematic diagram that the present invention optimizes up-link capacity and covering another embodiment.Preferably, the present embodiment Method and step can be executed by base station.When base station receives the reduction uplink transmission power request of adjacent cell transmission, carry out down Row optimization processing.

Step 401, when receiving the reduction uplink transmission power request of adjacent cell transmission, judge the covering of current area Whether index and/or capacity performance index reach scheduled target call.The covering index and/or capacity performance index of current area fail to reach To scheduled target call, 402 are thened follow the steps;If the covering index and capacity performance index of current area reach scheduled target It is required that thening follow the steps 403.

Step 402, refusal reduces uplink transmission power request.Later, other steps of the present embodiment are no longer executed.

Step 403, the ascending power parameter of current area is extracted.

Step 404, ascending power parameter is subtracted into scheduled power difference, estimates parameter to obtain ascending power.

Step 405, judge that ascending power estimates parameter whether in scheduled power bracket.If ascending power estimates parameter Not in scheduled power bracket, 402 are thened follow the steps;If ascending power estimates that parameter in scheduled power bracket, is held Row step 406.

Step 406, judge within the scope of scheduled uplink vertical dip angle with the presence or absence of candidate inclination angle.Wherein incline when with candidate When angle and ascending power estimation parameter carry out cell configuration, the covering index and capacity performance index of current area reach scheduled mesh Mark requires.If there is no candidate inclination angle, 402 are thened follow the steps;If there is candidate inclination angle, 407 are thened follow the steps.

All adjustable uplink inclination angles are traversed, estimate the covering corresponding to these uplink inclination angles and capacity performance index respectively.

Step 407, select the candidate inclination angle of numerical value minimum as optimal inclination angle.

If there are multiple uplink inclination angles can meet covering and capacity performance index simultaneously, select minimum uplink inclination angle and Ascending power estimates parameter as uplink inclination angle estimated value and ascending power estimated value.

Step 408, cell configuration is carried out using optimal inclination angle and ascending power estimation parameter.

After optimal uplink inclination angle and power parameter are estimated, the uplink inclination angle of active antenna is directly updated, such as Fruit power parameter is also required to be adjusted, ascending power parameter P0 in update broadcast message, for the user of connected state in cell Its update configuration is indicated using RRC information, its undated parameter, which configures, to be indicated using paging message for Idle state user.

Preferably, when receiving the reduction uplink transmission power request of adjacent cell transmission, further include:Judge current area Whether load is more than scheduled load-threshold.If current cell load is more than scheduled load-threshold, executing refusal reduces The step of row transmission power request.If current cell load is not more than scheduled load-threshold, executes and judge current area The step of whether covering index and/or capacity performance index reach scheduled target call.

Preferably, if it is possible to which the optimization for carrying out parameter is then confirmed to adjacent area or management station, and adjacent area is otherwise refused Or the request of management station.Such as confirmation and refuse information can be sent by X2 or S1 interfaces.Wherein in confirmation message extremely Include following content less:

Ask the cell ID of cell

The amplitude for asking the ascending power parameter of adjustment or the numerical value after adjustment

Following content is included at least in the message of refusal:

The reason of refusal

Refuse the cell ID of cell

Fig. 5 is the schematic diagram of base station one embodiment of the present invention.As shown in figure 5, base station includes collecting unit 501, first Recognition unit 502, the second recognition unit 503, dispensing unit 504 and transmission unit 505.Wherein:

Collecting unit 501, the business information for periodically acquiring current area.

First recognition unit 502, covering index for according to collected business information, judging current area and/or Whether capacity performance index reaches scheduled target call.

Second recognition unit 503, for the judging result according to the first recognition unit 502, if the covering of current area refers to Mark and/or capacity performance index do not reach scheduled target call, then further judge in scheduled cell uplink vertical dip angle model In enclosing, if there are target-angles;Wherein when carrying out cell configuration with target-angle and current area ascending power parameter, when The covering index and capacity performance index of preceding cell reach scheduled target call.

If dispensing unit 504, there are target-angle, utilizes mesh for the judging result according to the second recognition unit 503 It marks inclination angle and current area ascending power parameter carries out cell configuration.

Transmission unit 505, for the judging result according to the second recognition unit 503, if target-angle is not present, to neighbour Cell base station, which is sent, reduces uplink transmission power request, and the interference will pass through adjacent cell reduces to realize the covering of current area Index and capacity performance index reach scheduled target call.

Based on the base station that the above embodiment of the present invention provides, make the LTE cells of configuration active antenna in different interference rings So that this cell is reached desired covering and capacity goals in border, and reduce the uplink interference to adjacent area, to improve entire net The service quality of network up direction.

Fig. 6 is the schematic diagram of second recognition unit one embodiment of the invention.As shown in fig. 6, the second recognition unit includes Estimation module 601, inclination angle update module 602, the first judgment module 603 and the second judgment module 604.Wherein:

Estimation module 601, the current uplink vertical dip angle for estimating each terminal in current area, using as on carrying out The uplink inclination angle estimated value of row inclination angle estimation.

Inclination angle update module 602, for being updated to uplink inclination angle estimated value using predetermined inclination increment size;If current Cell only capacity performance index does not reach scheduled target call, then uplink inclination angle estimated value is increased predetermined inclination increment size;It is no Then, uplink inclination angle estimated value is subtracted into predetermined inclination increment size.

First judgment module 603, for judging whether uplink inclination angle estimated value is in scheduled cell uplink vertical dip angle In range.

Second judgment module 604, for the judging result according to the first judgment module 603, if at the estimated value of uplink inclination angle In within the scope of scheduled cell uplink vertical dip angle, then further judge in utilization uplink inclination angle estimated value and current area uplink Under conditions of power parameter is configured, whether the covering index and capacity performance index of current area, which reach scheduled target, is wanted It asks;If the covering index and capacity performance index of current area reach scheduled target call, using uplink inclination angle estimated value as Target-angle, instruction dispensing unit 504 is executed carries out cell configuration using target-angle and current area ascending power parameter Operation;If the covering index and/or capacity performance index of current area are not up to scheduled target call, it indicates that inclination angle update module 602 execute the operation being updated to uplink inclination angle estimated value using predetermined inclination increment size.

Preferably, the first judgment module 603, which is additionally operable to be in scheduled cell uplink in uplink inclination angle estimated value, vertically inclines When outside angular region, instruction transmission unit 505 executes the operation for being sent to adjacent cell base station and reducing uplink transmission power and asking.

Fig. 7 is the schematic diagram of another embodiment of the second recognition unit of the invention.Compared with embodiment illustrated in fig. 6, in Fig. 7 institutes Show in embodiment, the second recognition unit further includes extraction module 701, power update module 702, third judgment module 703 and matches Set module 704.Wherein:

Extraction module 701, for judging that uplink inclination angle estimated value is in scheduled cell uplink in the first judgment module 603 When outside vertical dip angle range, current area ascending power parameter is extracted, to estimate parameter as power.

Power update module 702, for power estimation parameter to be increased scheduled power increment, to estimate parameter to power It is updated.

Third judgment module 703, for judging whether power estimation parameter exceeds scheduled power bracket;If power is estimated Parameter exceeds scheduled power bracket, it indicates that transmission unit 505, which executes to send to adjacent cell base station, reduces uplink transmission power The operation of request;

Configuration module 704, for according to the judging result of third judgment module 703, if power estimate parameter without departing from Uplink inclination angle estimated value is then reset to the current uplink vertical dip angle of each terminal in current area by scheduled power bracket, Estimate that parameter and uplink inclination angle estimated value carry out cell configuration using power, then indicates that inclination angle update module 602 executes utilization The operation that predetermined inclination increment size is updated uplink inclination angle estimated value.

Preferably, estimation module 601 is specifically corresponding active when different uplink vertical dip angles are arranged using active antenna Difference between antenna gain estimates the current uplink vertical dip angle of each terminal in current area.

Fig. 8 is the schematic diagram of another embodiment in base station of the present invention.If above-described embodiment is compared, in the embodiment shown in fig. 8, Base station further includes request results recognition unit 801.Wherein:

Request results recognition unit 801 reduces uplink transmission power for being sent to adjacent cell base station in transmission unit 505 After the step of request, judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request;If all neighbours Cell base station is all refused to reduce uplink transmission power request, it indicates that transmission unit 505 reports optimization failure information to management station.

Preferably, base station further includes third recognition unit 802 and equilibrium treatment unit 803.Wherein:

Third recognition unit 802, for according to 501 collected business information of collecting unit, judging current cell load Whether scheduled load-threshold is more than;If current cell load is not more than scheduled load-threshold, it indicates that the first recognition unit 502 execute according to collected business information, judge whether the covering index of current area and/or capacity performance index reach scheduled The operation of target call.

Equilibrium treatment unit 803, for the judging result according to third recognition unit 802, if current cell load is more than Scheduled load-threshold then carries out load balance process.

Preferably, base station further includes receiving unit 804, the 4th recognition unit 805, parameter extraction unit 806, power parameter Estimation unit 807, the 5th recognition unit 808, the 6th recognition unit 809 and inclination angle selecting unit 810, wherein:

Receiving unit 804, the reduction uplink transmission power request for receiving adjacent cell transmission.

4th recognition unit 805, the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit 804 are asked When asking, judge whether the covering index of current area and/or capacity performance index reach scheduled target call.

Parameter extraction unit 806, for the judging result according to the 4th recognition unit 805, if the covering of current area refers to Mark and capacity performance index reach scheduled target call, then extract the ascending power parameter of current area.

Power parameter estimation unit 807, for ascending power parameter to be subtracted scheduled power difference, to obtain uplink work( Rate estimates parameter.

5th recognition unit 808, for judging that ascending power estimates parameter whether in scheduled power bracket.

6th recognition unit 809, for the judging result according to the 5th recognition unit 808, if ascending power estimates parameter In scheduled power bracket, then judge with the presence or absence of candidate inclination angle within the scope of scheduled uplink vertical dip angle, wherein when with When candidate inclination angle and ascending power estimation parameter carry out cell configuration, the covering index and capacity performance index of current area reach pre- Fixed target call.

Inclination angle selecting unit 810, if there is candidate inclination angle, is selected for the judging result according to the 6th recognition unit 809 The candidate inclination angle of numerical value minimum is selected as optimal inclination angle;Then instruction dispensing unit 504 is estimated using optimal inclination angle and ascending power It counts parameter and carries out cell configuration.

Preferably, the 6th recognition unit 809 is additionally operable to when there is no candidate inclination angle, and refusal reduces uplink transmission power and asks It asks.5th recognition unit 808 is additionally operable to when ascending power estimates parameter not in scheduled power bracket, and refusal reduces uplink Transmission power request.4th recognition unit 805 is additionally operable to the covering index of current area and/or capacity performance index fails to reach predetermined Target call when, refusal reduce uplink transmission power request.

Preferably, base station further includes the 7th recognition unit 811.Wherein:

7th recognition unit 811, the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit 804 are asked When asking, judge whether current cell load is more than scheduled load-threshold;If current cell load is more than scheduled load-threshold, Then refuse to reduce uplink transmission power request;If current cell load is not more than scheduled load-threshold, it indicates that the 4th identification The execution of unit 805 judges whether the covering index of current area and/or capacity performance index reach the operation of scheduled target call.

Below by several specific examples, the present invention will be described.

Embodiment 1:

The present embodiment mainly gives macro base station that one is configured with active antenna since itself covering performance fails to reach The desired value of system setting, the process that the covering performance of cell is optimized in such a way that uplink inclination angle optimizes.The macro base Station contains three cells, wherein triggering coverage optimization adjustment is cell 1.The antenna gain of wherein vertical plane is:

Parameters in Formula θ indicates the difference of the angle of the deflection of signal vertical plane angle of arrival and vertical plane maximum gain, And φtiltIndicate the angle of declination of vertical direction.And current uplink inclination angle is 14 degree in cell, and downlink inclination angle is 15 degree.And it hangs down Straight beam angle is 8 degree.

1. base station periodically counts the performance parameter of each cell under it, these performance parameters contain:

The active service rate that each of the user carries

The QCI each carried

The PBR each carried

The average MCS each carried

Each average PRB of carrying occupies number

The average PHR of the user

Whether be central user carrying

Ascending load capacity information

2. carrying of the base station for each cell, the expected rate being arranged respectively according to the business that OAM is each QCI grades And the active service rate of the business is compared, if active service rate reaches and is more than expected rate, then it is assumed that The expected rate of the business is satisfied with, and is otherwise unsatisfied with.And respectively to total business satisfaction rate and edge customer of cell Business satisfaction rate is counted, it is found that the business satisfaction rate of edge customer is less than pre-determined threshold T2, and it was found that uplink synthesis can It is more than thresholding T1 with load, then base station needs to execute the uplink coverage optimization process of cell 1.

3. calculating the function of the difference of vertical gain when different angle setting first:

Wherein parameter, Δ φ indicates the angle difference of front and back 2 vertical planes, then according to the user road different in uplink and downlink Gain is damaged to estimate the vertical to angle of arrival θ of each user.

4. due to being to solve covering problem, base station attempts to assess covering and appearance with setting less than current uplink inclination angle The index of amount.

5. base station side finds that after reducing 2 degree of settings, covering and capacity performance index are attained by expected thresholding, therefore uplink Inclination angle is 12 degree.

6. it is 12 degree that base station, which adjusts uplink inclination angle,.Whole flow process terminates.

Embodiment 2:

The present embodiment mainly gives macro base station that one is configured with active antenna since itself covering performance fails to reach System setting desired value, a suitable uplink inclination angle can not be found, the covering performance of cell is optimized, and trigger to The request of adjacent area 4 reduces the process of power parameter P0.The macro base station contains three cells, wherein triggering coverage optimization adjustment is Cell 1.The antenna gain of wherein vertical plane is:

And current uplink inclination angle is 14 degree in cell, and downlink inclination angle is 15 degree.And vertical beam width is 8 degree.

1. base station periodically counts the performance parameter of each cell under it, these performance parameters contain:

The active service rate that each of the user carries

The QCI each carried

The PBR each carried

The average MCS each carried

Each average PRB of carrying occupies number

The average PHR of the user

Whether be central user carrying

Ascending load capacity information

2. carrying of the base station for each cell, the expected rate being arranged respectively according to the business that OAM is each QCI grades And the active service rate of the business is compared, if active service rate reaches and is more than expected rate, then it is assumed that The expected rate of the business is satisfied with, and is otherwise unsatisfied with.And respectively to total business satisfaction rate and edge customer of cell Business satisfaction rate is counted, it is found that the business satisfaction rate of edge customer is less than pre-determined threshold T2, and it was found that uplink synthesis can It is more than thresholding T1 with load, then base station needs to execute the uplink coverage optimization process of cell 1.

3. calculating the function of the difference of vertical gain when different angle setting first:

Then the vertical to angle of arrival θ of each user is estimated in the different path loss gain of uplink and downlink according to user.

4. due to being to solve covering problem, base station attempts to assess covering and appearance with setting less than current uplink inclination angle The index of amount.

5. base station side is found under the configuration condition of current ascending power parameter P0, a suitable uplink can not be found Degree of tilt is attained by expected thresholding to cover with capacity performance index.Therefore it attempts to seek using larger ascending power parameter Look for a suitable uplink inclination angle, through trial find can not OAM configuration maximum P0 values within the scope of, a conjunction can not be found Suitable uplink inclination angle is come the needs of meeting capacity and covering.

6. base station is according to the relevant load messages of the ICIC received from adjacent area, it is thus understood that the money of the up direction of adjacent cell 4 Emitted using higher power always on source, therefore a power down request message, message content are sent to adjacent cell 4 Including:

Ask the amplitude of the ascending power parameter P0 declined

Ask the cell PCI and ECGI of cell

Embodiment 3:

The present embodiment mainly gives the small base station that one is configured with active antenna and is asked due to receiving the power reduction of adjacent area Ask and process that the uplink inclination angle to this cell and power setting parameter P0 are optimized, medium and small base station only there are one cell, And be an omnidirectional coverage cell, cell ID is cell 1, and the cell that transmission power declines request is a macrocell, cell It is identified as cell 4, the topological relation of cell 1 and cell 4 is referring to Fig. 9.The antenna gain of wherein vertical plane is:

And current uplink inclination angle is 14 degree in cell, and downlink inclination angle is 15 degree.And vertical beam width is 8 degree.

The base stations 1.PICO periodically count the performance parameter of its lower cell 1, these performance parameters contain:

The active service rate that each of the user carries

The QCI each carried

The PBR each carried

The average MCS each carried

Each average PRB of carrying occupies number

The average PHR of the user

Whether be central user carrying

Ascending load capacity information

2. carrying of the base station for each cell, the expected rate being arranged respectively according to the business that OAM is each QCI grades And the active service rate of the business is compared, if active service rate reaches and is more than expected rate, then it is assumed that The expected rate of the business is satisfied with, and is otherwise unsatisfied with.And respectively to total business satisfaction rate and edge customer of cell Business satisfaction rate is counted, it is found that the business satisfaction rate of edge customer is higher than pre-determined threshold T2, and it was found that uplink synthesis can It is more than thresholding T3 with load, then base station is needed without executing uplink coverage optimization process.

3. cell 1 receives the power parameter adjust request of cell 4, following information is contained in request message:

Ask the ascending power parameter P declined0Amplitude, ao P1

Ask the cell PCI and ECGI of cell

4. calculating the function of the difference of vertical gain when different angle setting first:

Then the vertical to angle of arrival θ of each user is estimated in the different path loss gain of uplink and downlink according to user.

5. base station is attempted less than current ascending power parameter, Δ P1Configuration condition under, find a suitable uplink Inclination angle meets the demand of the covering and capacity of itself.

6. small base station finds that multiple uplink inclination values can meet capacity and covering demand by assessing, uplink inclination value from 8 degree to 11 degree, select 8 degree minimum of inclination angle setting value as assessment result.

7. the uplink inclination angle that small base station adjusts oneself is set as 8 degree, and updates the ascending power parameter in broadcast message Setting value is P0-ΔP1.And the base stations PICO notify activation user all within the scope of its using RRC information, utilize paging message Terminal update broadcast message of the notice in Idle state.

8. small base station declines response message to 4 own base station transmission power of cell, the content for including in message is:

The PCI and ECGI of cell 1

Power parameter setting after adjustment

The time point that parameter comes into force

By applying the present invention, following advantageous effect can be obtained.

1. uplink inclination angle and power parameter optimization method that this patent proposes, and are configured with traditional passive antenna system phase Than the lower decline angle without adjusting antenna, does not interfere with the topological structure of network and shadow is generated to the performance of downlink user It rings, adjustment process will not have a negative impact to the user of serving cell.

2. the estimation mode for the vertical dip angle that this patent proposes directly utilizes the statistical result of existing system, without complexity Signal processing, reduce the complexity of realization.

3. the covering proposed by this patent and capacity self-organization method, cell can be made in disturbance environment and When load condition, reach the optimal of its capacity and covering, and reduce it is artificial participate in, reduce the O&M cost of operator.

4. scheme is that algorithm is realized in the inside of a base station in the present invention, existing LTE terminal is not influenced, and to network The change of side is smaller, therefore has good exploitativeness.

One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..

Description of the invention provides for the sake of example and description, and is not exhaustively or will be of the invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage Various embodiments with various modifications of the solution present invention to design suitable for special-purpose.

Claims (20)

1. a kind of method optimized to up-link capacity and covering, which is characterized in that including:
Periodically acquire the business information of current area;
According to collected business information, judge whether the covering index of current area and/or capacity performance index reach scheduled mesh Mark requires;
If the covering index and/or capacity performance index of current area do not reach scheduled target call, further judge pre- Within the scope of fixed cell uplink vertical dip angle, if there are target-angles;Wherein when with target-angle and current area uplink work( When rate parameter carries out cell configuration, the covering index and capacity performance index of current area reach scheduled target call;
If there are target-angle, cell configuration is carried out using target-angle and current area ascending power parameter;
If target-angle is not present, being sent to adjacent cell base station reduces uplink transmission power request, will pass through adjacent cell The covering index and capacity performance index that interference reduces to realize current area reach scheduled target call.
2. according to the method described in claim 1, it is characterized in that,
Judge within the scope of scheduled cell uplink vertical dip angle, if there are the step of target-angle to include:
The current uplink vertical dip angle for estimating each terminal in current area, using the uplink inclination angle as progress uplink inclination angle estimation Estimated value;
Uplink inclination angle estimated value is updated using predetermined inclination increment size;If current area only capacity performance index does not reach pre- Uplink inclination angle estimated value is then increased predetermined inclination increment size by fixed target call;Otherwise, uplink inclination angle estimated value is subtracted pre- Constant inclination angle increment value;
Judge uplink inclination angle estimated value whether within the scope of scheduled cell uplink vertical dip angle;
If uplink inclination angle estimated value is within the scope of scheduled cell uplink vertical dip angle, further judge to incline using uplink Under conditions of angular estimation value and current area ascending power parameter are configured, the covering index and capacity performance index of current area are It is no to reach scheduled target call;
If the covering index and capacity performance index of current area reach scheduled target call, using uplink inclination angle estimated value as Target-angle executes the step of carrying out cell configuration using target-angle and current area ascending power parameter;
If the covering index and/or capacity performance index of current area are not up to scheduled target call, execute and utilize predetermined inclination The step of increment size is updated uplink inclination angle estimated value.
3. according to the method described in claim 2, it is characterized in that,
If uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, executes to send to adjacent cell base station and drop The step of low uplink transmission power request.
4. according to the method described in claim 3, it is characterized in that,
If uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, further include:
Current area ascending power parameter is extracted, to estimate parameter as power;
Power estimation parameter is increased into scheduled power increment, to be updated to power estimation parameter;
Judge whether power estimation parameter exceeds scheduled power bracket;
If power estimates that parameter without departing from scheduled power bracket, uplink inclination angle estimated value is reset to every in current area The current uplink vertical dip angle of a terminal is estimated that parameter and uplink inclination angle estimated value carry out cell configuration using power, is then held The step of row is updated uplink inclination angle estimated value using predetermined inclination increment size;
If power estimates that parameter exceeds scheduled power bracket, execute reduces uplink transmission power to the transmission of adjacent cell base station asks The step of asking.
5. according to the method described in claim 2, it is characterized in that,
The step of current uplink vertical dip angle of each terminal, includes in estimation current area:
Using difference of the active antenna when different uplink vertical dip angles are arranged between corresponding active antenna gain, estimation is current The current uplink vertical dip angle of each terminal in cell.
6. according to the method described in claim 1, it is characterized in that,
It is sent to adjacent cell base station after reducing the step of uplink transmission power is asked, further includes:
Judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request;
If all adjacent cell base stations all refuse to reduce uplink transmission power request, optimization failure information is reported to management station.
7. according to the method described in claim 1, it is characterized in that,
Periodically after the step of business information of acquisition current area, further include:
According to collected business information, judge whether current cell load is more than scheduled load-threshold;
If current cell load is more than scheduled load-threshold, load balance process is carried out;
If current cell load is not more than scheduled load-threshold, execute according to collected business information, judges current small The step of whether the covering index and/or capacity performance index in area reach scheduled target call.
8. according to the method described in claim 1, it is characterized in that, the method further includes:
When receiving the reduction uplink transmission power request of adjacent cell transmission, the covering index and/or appearance of current area are judged Whether figureofmerit reaches scheduled target call;
If the covering index and capacity performance index of current area reach scheduled target call, the uplink work(of current area is extracted Rate parameter;
Ascending power parameter is subtracted into scheduled power difference, estimates parameter to obtain ascending power;
Judge that ascending power estimates parameter whether in scheduled power bracket;
If ascending power estimates parameter in scheduled power bracket, judge within the scope of scheduled uplink vertical dip angle whether There are candidate inclination angles, wherein when carrying out cell configuration with candidate inclination angle and ascending power estimation parameter, the covering of current area Index and capacity performance index reach scheduled target call;
If there is candidate inclination angle, select the candidate inclination angle of numerical value minimum as optimal inclination angle;
Cell configuration is carried out using optimal inclination angle and ascending power estimation parameter.
9. according to the method described in claim 8, it is characterized in that,
If there is no candidate inclination angle, refuse to reduce uplink transmission power request;
If ascending power estimates parameter not in scheduled power bracket, refuse to reduce uplink transmission power request;
The covering index and/or capacity performance index of current area fail to reach scheduled target call, then refuse to reduce uplink transmitting Power request.
10. according to the method described in claim 8, it is characterized in that,
When receiving the reduction uplink transmission power request of adjacent cell transmission, further include:
Judge whether current cell load is more than scheduled load-threshold;
If current cell load is more than scheduled load-threshold, refuse to reduce uplink transmission power request;
If current cell load is not more than scheduled load-threshold, the covering index and/or capacity for judging current area are executed The step of whether index reaches scheduled target call.
11. a kind of base station optimized to up-link capacity and covering, which is characterized in that single including collecting unit, the first identification Member, the second recognition unit, dispensing unit and transmission unit, wherein:
Collecting unit, the business information for periodically acquiring current area;
First recognition unit, for according to collected business information, judging the covering index and/or capacity performance index of current area Whether scheduled target call is reached;
Second recognition unit, for the judging result according to the first recognition unit, if the covering index and/or capacity of current area Index does not reach scheduled target call, then further judges within the scope of scheduled cell uplink vertical dip angle, if deposit In target-angle;Wherein when carrying out cell configuration with target-angle and current area ascending power parameter, current area is covered Lid index and capacity performance index reach scheduled target call;
If dispensing unit, there are target-angle, using target-angle and is worked as the judging result according to the second recognition unit Preceding cell uplink power parameter carries out cell configuration;
Transmission unit, if target-angle is not present, is sent out for the judging result according to the second recognition unit to adjacent cell base station Sending reduces uplink transmission power request, and the interference will pass through adjacent cell reduces to realize the covering index and capacity of current area Index reaches scheduled target call.
12. base station according to claim 11, which is characterized in that the second recognition unit includes estimation module, inclination angle update Module, the first judgment module and the second judgment module, wherein:
Estimation module, the current uplink vertical dip angle for estimating each terminal in current area, using as carrying out uplink inclination angle The uplink inclination angle estimated value of estimation;
Inclination angle update module, for being updated to uplink inclination angle estimated value using predetermined inclination increment size;If current area is only Capacity performance index does not reach scheduled target call, then uplink inclination angle estimated value is increased predetermined inclination increment size;It otherwise, will be upper Row inclination angle estimated value subtracts predetermined inclination increment size;
First judgment module, for judging uplink inclination angle estimated value whether within the scope of scheduled cell uplink vertical dip angle;
Second judgment module, for the judging result according to the first judgment module, if uplink inclination angle estimated value is in scheduled small Within the scope of area's uplink vertical dip angle, then further judge utilization uplink inclination angle estimated value and current area ascending power parameter into Under conditions of row configuration, whether the covering index and capacity performance index of current area reach scheduled target call;If current small The covering index and capacity performance index in area reach scheduled target call, then using uplink inclination angle estimated value as target-angle, refer to Show that dispensing unit executes the operation that cell configuration is carried out using target-angle and current area ascending power parameter;If current area Covering index and/or capacity performance index be not up to scheduled target call, it indicates that inclination angle update module execute utilize pre- constant inclination The operation that angle increment value is updated uplink inclination angle estimated value.
13. base station according to claim 12, which is characterized in that
First judgment module is additionally operable to when uplink inclination angle estimated value is in outside scheduled cell uplink vertical dip angle range, instruction Transmission unit executes the operation for being sent to adjacent cell base station and reducing uplink transmission power and asking.
14. base station according to claim 13, which is characterized in that the second recognition unit further include extraction module, power more New module, third judgment module and configuration module, wherein:
Extraction module, for judging that uplink inclination angle estimated value is in scheduled cell uplink vertical dip angle model in the first judgment module When enclosing outer, current area ascending power parameter is extracted, to estimate parameter as power;
Power update module, for power estimation parameter to be increased scheduled power increment, to be carried out more to power estimation parameter Newly;
Third judgment module, for judging whether power estimation parameter exceeds scheduled power bracket;If power estimates that parameter is super Go out scheduled power bracket, it indicates that transmission unit executes the behaviour for being sent to adjacent cell base station and reducing uplink transmission power and asking Make;
Configuration module, for the judging result according to third judgment module, if power estimates parameter without departing from scheduled power Uplink inclination angle estimated value is then reset to the current uplink vertical dip angle of each terminal in current area, is estimated using power by range It counts parameter and uplink inclination angle estimated value carries out cell configuration, then indicate that inclination angle update module executes and utilize predetermined inclination increment size The operation that uplink inclination angle estimated value is updated.
15. base station according to claim 12, which is characterized in that
Estimation module specifically utilizes active antenna when different uplink vertical dip angles are arranged between corresponding active antenna gain Difference estimates the current uplink vertical dip angle of each terminal in current area.
16. base station according to claim 11, which is characterized in that the base station further includes request results recognition unit, In:
Request results recognition unit reduces the step of uplink transmission power is asked for being sent to adjacent cell base station in transmission unit Later, judge whether that all adjacent cell base stations all refuse to reduce uplink transmission power request;If all adjacent cell base stations are all Refusal reduces uplink transmission power request, it indicates that transmission unit reports optimization failure information to management station.
17. base station according to claim 11, which is characterized in that the base station further includes at third recognition unit and equilibrium Unit is managed, wherein:
Third recognition unit, for according to the collected business information of collecting unit, it is pre- to judge whether current cell load is more than Fixed load-threshold;If current cell load is not more than scheduled load-threshold, it indicates that the first recognition unit executes basis and adopts The business information collected, judges whether the covering index of current area and/or capacity performance index reach the behaviour of scheduled target call Make;
Equilibrium treatment unit, for the judging result according to third recognition unit, if current cell load is more than scheduled load Thresholding then carries out load balance process.
18. base station according to claim 11, which is characterized in that the base station further includes receiving unit, the 4th identification list Member, parameter extraction unit, power parameter estimation unit, the 5th recognition unit, the 6th recognition unit and inclination angle selecting unit, In:
Receiving unit, the reduction uplink transmission power request for receiving adjacent cell transmission;
4th recognition unit judges when the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit is asked Whether the covering index and/or capacity performance index of current area reach scheduled target call;
Parameter extraction unit, for the judging result according to the 4th recognition unit, if the covering index and capacity of current area refer to Mark reaches scheduled target call, then extracts the ascending power parameter of current area;
Power parameter estimation unit, for ascending power parameter to be subtracted scheduled power difference, to obtain ascending power estimation Parameter;
5th recognition unit, for judging that ascending power estimates parameter whether in scheduled power bracket;
6th recognition unit, for the judging result according to the 5th recognition unit, if ascending power estimates parameter in scheduled work( Within the scope of rate, then judge with the presence or absence of candidate inclination angle within the scope of scheduled uplink vertical dip angle, wherein when with candidate inclination angle and When ascending power estimates that parameter carries out cell configuration, the covering index and capacity performance index of current area reach scheduled target and want It asks;
Inclination angle selecting unit, if there is candidate inclination angle, selects numerical value minimum for the judging result according to the 6th recognition unit Candidate inclination angle as optimal inclination angle;Then instruction dispensing unit carries out cell using optimal inclination angle and ascending power estimation parameter Configuration.
19. base station according to claim 18, which is characterized in that
6th recognition unit is additionally operable to when there is no candidate inclination angle, and refusal reduces uplink transmission power request;
5th recognition unit is additionally operable to when ascending power estimates parameter not in scheduled power bracket, and refusal reduces uplink hair Penetrate power request;
4th recognition unit is additionally operable to the covering index of current area and/or capacity performance index fails to reach scheduled target call When, refusal reduces uplink transmission power request.
20. base station according to claim 18, which is characterized in that the base station further includes the 7th recognition unit, wherein:
7th recognition unit judges when the reduction uplink transmission power for receiving adjacent cell transmission when receiving unit is asked Whether current cell load is more than scheduled load-threshold;If current cell load is more than scheduled load-threshold, refuse to drop Low uplink transmission power request;If current cell load is not more than scheduled load-threshold, it indicates that the 4th recognition unit executes Judge whether the covering index of current area and/or capacity performance index reach the operation of scheduled target call.
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