CN102065432B - Transmission model-based network coverage correcting method and system - Google Patents
Transmission model-based network coverage correcting method and system Download PDFInfo
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Abstract
The invention discloses a transmission model-based network coverage correcting method and a transmission model-based network coverage correcting system. The method comprises: extracting basic information data of indoor distribution systems of a base station and a repeater; partitioning the acquired various basic information data, and selecting corresponding transmission models for coverage prediction; and extracting relative data from a road test system to correct the selected transmission models. In the embodiments of the invention, the basic information of the base station as well as the basic data of the indoor distribution system are acquired, then the network coverage conditions of the indoor distribution system is subsequently supplemented by the signal strength corrected by the transmission model, the acquired data are partitioned, different transmission models are adopted for different data, and thus, the problem that the network coverage condition cannot be acquired accurately in the prior art can be solved.
Description
Technical field
The present invention relates to wireless technology in the communications field, particularly, relate to a kind of network coverage modification method and system based on propagation model.
Background technology
The covering of wireless cellular network is subjected to factor affecting such as the position, topography and geomorphology of base station.Along with the construction of urban construction, mobile network extension and rolling, the actual theoretical coverage that has been different from network planning design that covers of network.At present existing network is covered 3 kinds of methods of the general use of situation: 1. by extensive careful drive test, the analytical test index is weighed; 2. the network problem of complaining according to client 10086 (China Mobile's customer service number) is by on-the-spot fixed test awareness network coverage condition; 3. utilize propagation model to calculate theoretic covering simulation drawing.
The using method that in the prior art existing network is covered situation all has shortcoming in various degree:
1. the defective of extensive careful drive test: test period is long and generally only can guarantee the coverage test urban district in, can't be by the means acquisition coverage condition of test to the zone that automatic road measuring system (being loaded in the tester on the taxi) or the daily test of network maintenance staff can't arrive; And the descending coverage condition of the street face that can only characterize of drive test data, building stops for being subjected to, indoor covering and not test zone then can't obtain characterizing the test data of its actual coverage condition; In addition, " coverage rate " that obtain by drive test data is overall concept, can't accomplish to grasp concrete zone comprehensively.
2. complain the defective of awareness network problem by client 10086: the one, customer complaint lags behind network problem, and network is complained limited for the sampling of network problem; The 2nd, because being honeycomb, current mobile network covers, adjustment granularity to network is generally cell-level, because the unknown that the peripheral region covers makes the complaint that solves a point when handling network complaint problem probably bring the complaint hidden danger of other zone of ignorance.
3. the network coverage that utilizes propagation model to obtain is based on (the OperationMaintenace Center of operation maintenance center, abbreviation OMC) data such as the basic physical message data of upward extracting in base station and antenna property data, consider that topography and geomorphology is to the attenuation of radio signal propagation, utilize the traditional communication model to obtain the network signal intensity coverage diagram, do not considered regional difference and do not considered network installation the building coverage condition of repeater indoor distributed system, accurate inadequately.
Summary of the invention
First purpose of the present invention is the defective at above-mentioned network coverage occupation mode in the prior art, proposes a kind of network coverage modification method based on propagation model, to realize obtaining network coverage situation accurately.
Second purpose of the present invention is the defective at network coverage occupation mode in the prior art, proposes a kind of network overlay system based on propagation model, to realize obtaining network coverage situation accurately.
For realizing above-mentioned first purpose, according to an aspect of the present invention, provide a kind of network coverage modification method based on propagation model, comprising: extract the basic information data that comprises base station, repeater indoor distributed system and antenna; Various basic information datas are carried out the zone divide, and select corresponding propagation model to carry out coverage prediction; According to the downstream signal intensity of from driver test system, extracting and basic information data the propagation model of selecting is revised.
Preferably, can also comprise: calculate the downlink path loss according to revised described propagation model; Down receiving signal intensity=base station transmitting power-downlink path loss according to each point in the base station transmitting power in the basic information data and the path loss calculation network; The network coverage that generation comprises signal strength values presents figure.
Preferably, can also comprise: the perception influence according to user's different business quantizes the signal strength signal intensity that the network coverage presents figure.
Preferably, can also comprise: geographical location information and the network coverage are presented figure carry out relatedly, generate the geographical location information data storehouse; According to user's information to be checked, from the Query Result of described geographical location information data library lookup association; According to the geographical location information of information to be checked, Query Result is positioned to the network coverage presents figure.
For realizing above-mentioned second purpose, according to another aspect of the present invention, a kind of network overlay system based on propagation model is provided, comprise: data acquisition module, be used for gathering the Back ground Information that comprises mobile communication system base station and repeater indoor distributed system, and extract the downstream signal strength information from driver test system; The base station property sort module is used for Back ground Information according to overlay area ownership classification, the propagation model that selection is corresponding; The propagation model revision module is used for according to the downstream signal intensity of extracting from driver test system the described propagation model of having selected being revised, and obtains revised signal strength signal intensity; Quantization modules is used for according to the perception influence of user's different business the network coverage signal strength signal intensity that obtains after the propagation model revision module being quantized; The association search module is used for association search is carried out in the network coverage that quantizes, and obtains the signal coverage varies in searched zone.
Wherein, acquisition module can be gathered the Back ground Information of base station in the mobile communication system, antenna and repeater indoor distributed system from OMC, gather described downstream signal intensity from driver test system.The base station property sort module can be divided into dense city and suburb according to base station property, selects Urban model and 9999 propagation models respectively, and described repeater indoor distributed system is adopted the Urban model.
Network coverage modification method and the system based on propagation model of various embodiments of the present invention, not only gather the Back ground Information of base station, also further gather indoor distributed system, as the basic data of repeater, and with the different different propagation models of Back ground Information employing, carry out the propagation model correction according to the downstream signal intensity that driver test system extracts, therefore, compared with prior art, consideration more comprehensively and accurately, more press close to the network coverage situation of reality.
The present invention also some embodiment presents network coverage situation according to revised propagation model, and support association search, can make things convenient for, see intuitively the coverage condition of wanting inquiring position, for the subsequent network operation is provided convenience, avoid wasting time and energy of single subdistrict model measurement, complain the quick location of problem, daily network etc. to provide auxiliary for network and optimize.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 the present invention is based on network coverage modification method embodiment one flow chart of propagation model for basis;
Fig. 2 is that the network coverage modification method that the present invention is based on propagation model is applied to the embodiment flow chart that GSM and the TD network coverage present;
Fig. 3 specifically is applied to the gatherer process embodiment schematic diagram of GSM and TD network road measurement data for step S102 among Fig. 1;
Fig. 4 the present invention is based on the process embodiment flow chart of in the network coverage modification method of propagation model propagation model being revised;
Fig. 5 is the example structure schematic diagram that the present invention is based on the network overlay system of propagation model;
Fig. 6 the present invention is based on the embodiment schematic diagram that association search location and position present in the network coverage modification method of propagation model and the system.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in restriction the present invention.
Embodiment one
Fig. 1 is that as shown in Figure 1, present embodiment comprises according to network coverage modification method embodiment one flow chart that the present invention is based on propagation model:
Step S102: from based on (the Operation Maintenace Center of operation maintenance center, abbreviation OMC) base station, repeater indoor distributed system and the antenna foundation information data of extraction existing network are as going up the data of extracting base station, antenna parameter and the repeater indoor distributed system of existing network by the cell-level mode from OMC;
Step S104: the data based area classification that step S102 gathers is divided, adopt different propagation models to carry out coverage prediction to different classifications;
As, the overlay area is divided into dense city and suburb, position according to base station and antenna is divided into dense city or suburb, and adopt " Urban " propagation model and " 9999 " propagation model respectively according to the area classification after dividing, the repeater indoor distributed system is adopted " Urban " propagation model;
Step S106: from drive test data storehouse (the daily test data of this each equipment producer of database typing prefectures and cities of driver test system, and be uniform data format storage with its standard) in extract the downstream signal intensity level, and the propagation model of having selected is revised, as adopting least square method, specifically can be referring to subsequent figure 4 makeover process for example;
Step S108: can obtain the downlink path loss according to the propagation model of revising, coverage prediction to step S104 replenishes, the actual signal receiving intensity of computing network, down receiving signal intensity=base station transmitting power-downlink path loss (revising the back) obtains revised network coverage situation.
In the present embodiment, unlike the Back ground Information of only gathering the base station in the prior art, also further gather indoor distributed system, basic data as the repeater, therefore need in the subsequent process to adopt the revised signal strength signal intensity of propagation model that the situation of the network coverage is replenished to indoor distributed system, and present embodiment is also divided the data of gathering, the propagation model different to different The data, downstream signal intensity according to driver test system is revised propagation model, makes its more closing to reality situation, therefore, compared with prior art, consider that the signal strength signal intensity that calculates is more accurate, more the network coverage situation of closing to reality more comprehensively.
In mobile network's O﹠M, operator distribute to build, adjusts base station transmitting power, changes antenna property, revises means such as network parameter by the repeater, with reach on the wireless network range and the degree of depth on the purpose of covering.The power of network signal intensity influences choosing of mobile network's (as the TD network) different system switching and gravity treatment, power control strategy etc., perception influence to the data business is great, directly influence is at present with the 80% indoor TD network that is covered as the data service hot spot region, for the understanding of the detailed condition of the network coverage, the network maintenance staff still is that the professional promotion business of market 3G (3G (Third Generation) Moblie) is all most important.Because the covering of global system for mobile communications (GSM) network of China Mobile day by day tends towards stability with operation, and synchronous CDMA (Code Division Multiple Access) (TD-SCDMA of time-division, being designated hereinafter simply as TD) network is in the large scale network construction period, in the face of the demand of the maintenance of the promoting service in TD market, its network and optimization presenting and provide the high quality services ability all to propose urgent demand the network coverage.
The following examples are applied to the heterogeneous networks coverage condition to network coverage modification method of the present invention, and network coverage situation presented are illustrated, with satisfy maintenance optimization with present relevant demand.
Embodiment two
Fig. 2 is that the network coverage modification method that the present invention is based on propagation model is applied to the embodiment flow chart that GSM and the TD network coverage present.As shown in Figure 2, comprising:
Step 201: the Back ground Information of gathering and read base station, antenna and repeater indoor distributed system in GSM and the TD mobile communication system;
General these Back ground Informations are being entered among the OMC of static state in advance, the Back ground Information of GSM network base station can comprise longitude and latitude, cell name, antenna type, antenna extension height, antenna directional angle, Downtilt, antenna gain, CBCH frequency point number (the Broadcast ControlChannel of base station, be called for short BCCH), cell ID (Base Station Identity Code is called for short BSIC) etc.; The TD network base station Back ground Information of gathering comprises longitude and latitude, cell name, antenna type, antenna extension height, antenna directional angle, Downtilt, antenna gain, residential quarter dominant frequency period (the Primary Common Control Physical Channel of base station, be called for short PCCPCH), cell scrambling (Scrambling Code is called for short SC) etc.;
The Back ground Information of repeater indoor distributed system be can gather from discharging-directly station network management, indoor distributed system main equipment place, repeater longitude and latitude, information source cell name, repeater indoor distributed system site name, device type, transmitting power etc. specifically can be comprised;
Below step 202-204 order not unique, not necessarily according to the order among Fig. 2, these several steps can be carried out simultaneously, also can step 203 before 202, order is not unique in a word.
Step 202: utilize above-mentioned base station, antenna, and the Back ground Information of repeater indoor distributed system, from the drive test data storehouse, as in the GIS driver test system among Fig. 2 the drive test data that belongs to same residential quarter being carried out association location and screening, specifically can be referring to the collecting flowchart schematic diagram among Fig. 3;
Wherein, drive test data comprises: GSM network road measurement data comprise the BCCH of current longitude and latitude, sampled point broadcast channel downstream signal intensity, sampled point home cell title, home cell of sampled point and BSIC etc.; TD network road measurement data comprise the PCCPCH of current longitude and latitude, sampled point broadcast channel downstream signal intensity, sampling sampled point home cell title, home cell of sampled point and SC etc.;
Step 203: the data of gathering are classified according to GSM and TD cell coverage area ownership;
Can classify by landforms to the single subdistrict overlay area by " XXX province residential quarter attaching information " for GSM and TD cell coverage area category attribution, comprising various landforms such as forest, greenery patches, skyscraper, ordinary residence district, large-scale plant area, vacant lot, suburb, rural area, suburb, vacant lot, city, water system, wetlands;
Step 204: the propagation model different according to the overlay area categorizing selection, utilize the drive test data in the step 202 that propagation model is revised;
For example, the overlay area is divided into dense city and suburb, adopt Urban propagation model and 9999 propagation models respectively, the repeater indoor distributed system is adopted the Urban propagation model, select behind the propagation model drive test data in the recycling step 202 that model parameter is revised, specifically the flow process that can adopt least-squares algorithm to revise referring to Fig. 4 embodiment;
By arriving step 204, utilize the propagation model of revising to obtain accurate path loss values, can calculate acquisition actual downstream signal receiving strength according to the base station transmitting power in the Back ground Information of the base station of having extracted, repeater indoor distributed system, i.e. this accurate signal intensity level, thus the coverage condition of whole network obtained.For easy to use, the related personnel can see coverage condition intuitively, can also continue following step 205-207:
Step 205: generate the GSM network and two coverings of TD network present figure according to the propagation model of the Back ground Information of base station.
Adopt present embodiment directly to generate accurate network according to base station, indoor distributed system, antenna foundation information and revised propagation model and present figure, but generally propagation model is not revised in the prior art, do not gather the Back ground Information of repeater indoor distributed system yet, therefore, can present on the figure basis at existing network, further utilize Back ground Information and the correction propagation model of repeater indoor distributed system that the existing signal strength signal intensity that presents among the figure that covers is replenished respectively, form revised network and present figure, present the coverage condition of network;
Particularly, zone that can 50m * 50m is that coverage is drawn a circle to approve and presented figure in covering the repeater indoor distributed system and presents;
Step 206: if present the coverage condition that figure indicates that each is regional in covering, as signal strength signal intensity, have numerous data values.In the present embodiment, preferably quantize covering signal strength signal intensity based on user's perception at speech and data service, and present with different colours, present figure like this and can compare intuitively, can open-and-shutly know that the network coverage intensity in which zone is good, a little less than which;
For example, can quantize (not having under bursty interference and outer net disturbed condition and the limited situation of no capacity at network) to voice service and data service perception influence to downlink broadcast channel signal strength in the GSM/TD network, as shown in table 1 below:
Table 1 is according to the quantization table of the perception under user's different business to the network coverage
As table 1, according to data service and voice service user perception coverage condition is carried out blueness, green, orange, redness etc. and carry out color quantization;
Step 207: the data that present figure by the network coverage to step 205 are carried out association search and are handled, as covering is presented figure with the file of Chinese character, letter, data, punctuate allow to check, permissions such as modification, keyword search inquire about this regional GSM and TD network coverage situation by longitude and latitude, geographical sign.
In the described step 207, the covering that obtains for maintenance, customer service, marketing personal's inquiry presents the form that figure can picture and presents, searched longitude and latitude or significant facility are the center picture point, present the GSM network of searched point and peripheral region thereof and the coverage condition of TD network, thus for promote business, network O﹠M provides more intuitive data to show.
In the present embodiment, collect the base station by OMC, repeater indoor distributed system Back ground Information, and to the base station, repeater institute divides according to the residential quarter attaching information overlay area, carrying out propagation model selects, can utilize inside the province GIS driver test system road test data to carry out the association sampling, based on least-squares algorithm propagation model parameter is proofreaied and correct, merge repeater indoor distributed system coverage condition, generate GSM and two coverage diagrams of TD-SCDMA, based on the perception of user on data service and voice service with blueness, green, orange and red quantification coverage diagram, and support the association search of longitude and latitude and significant terrestrial reference and region of search covering to present.
The network coverage modification method that the present invention is based on propagation model is applied to GSM to present embodiment and the TD network illustrates, and concrete makeover process and the follow-up process that presents had been described in detail, present embodiment is not only taken all factors into consideration the network coverage situation of repeater indoor distributed system, can obtain more accurate network coverage signal, can also coverage condition be presented in the mode that quantizes, make things convenient for the user to obtain to be queried a little network coverage information intuitively, be daily network operation, promoting service, work such as customer complaint processing and network planning construction facilitate.
Embodiment three
Fig. 3 is the gatherer process embodiment schematic diagram that step S 102 specifically is applied to GSM and TD network road measurement data among Fig. 1, and as shown in Figure 3, present embodiment comprises:
Before gathering drive test data, earlier according to step S301-302, set in advance the span of data and gather the back formats stored, to gather according to the order of step S303-304 then, detailed process is as follows:
Step S301: default value threshold range arranges the value thresholding and can screen some invalid datas;
Consider that the data too near apart from the base station are generally direct signal, can't reflect the surrounding terrain landforms to the influence of radio transmission, need filtering; Data too far away for the distance base station, that intensity is too weak, signal has been submerged in and has also wanted filtering in the noise.Therefore, present embodiment is set to the span of data under the various communication environments: the urban district is apart from 200 meters of the base stations, the suburb is apart from 300 meters of the base stations, the rural area is apart from 300 meters of the base stations, signal strength range generally gets-60dBm～-110dBm, the concrete condition of level can be according to transmitter power, antenna gain, feeder loss, parameter setting such as Downtilt and deciding;
Step S302: default drive test data point record format, the storage that Cai Yang data can direct convenience like this, drive test data can comprise longitude, latitude, home cell information such as (being the base station), the data record format that present embodiment is preset is as shown in table 2 below;
Table 2 drive test data point record format table
| Longitude | Latitude | Home cell | The broadcast channel sign | Cell ID | Cell transmit power (base station transmitting power) | The Serving cell incoming level |
| 125.345 | 45.786 | XXX | PCCPCH/BCCH | SC/BSIC | -33dBm | -86dBm |
| 125.335 | 45.584 | XXX | PCCPCH/BCCH | SC/BSIC | -33dBm | -83dBm |
| 125.315 | 45.686 | XXX | PCCPCH/BCCH | SC/BSIC | -33dBm | -76dBm |
| 125.245 | 45.785 | XXX | PCCPCH/BCCH | SC/BSIC | -33dBm | -90dBm |
Step S303: from the drive test data storehouse, extract drive test data, judge the validity of drive test data, particularly, drive test data to sampled point is judged and filtration treatment according to the value thresholding that arranges, deletion disappearance longitude and latitude lacks signal strength values, does not comprise Cell Identity CI, signal strength signal intensity surpasses the data of particular range, to guarantee the reliability of data;
Step S304: effective drive test data is carried out association, namely determine corresponding which particular location of valid data of sampling, carry out location association;
Particularly, sampled point available in the drive test data is identified and cell ID by its broadcast channel, logd (apart from logarithm value) apart from the base station carries out curve fitting with the received power signal strength values of each sector and sampled point, sampling number certificate to a certain thresholding of deflection curve screens out, go up residential quarter (base station) data of extraction and landforms and the sign that " XXX economizes the local resource database " determines this data point according to OMC, utilize " XXX economizes the local resource database " that data point is carried out association according to base station coverage area, as shown in table 3:
Table 3 pair data point is carried out the location association table according to cell coverage area
Present embodiment exemplifies the process of sampling, owing to preset the valid data value thresholding of sampling in advance, therefore can filtering invalid data, and then active data is carried out association, improved the processing speed of data.
Embodiment four
As shown in Figure 3, after step S304, associated data can be carried out the model correction, Fig. 4 the present invention is based on the process embodiment flow chart of in the network coverage modification method of propagation model propagation model being revised, present embodiment is to revise for example propagation model based on least-squares algorithm, wherein step S401-S402 is the process of collection, and how step S403-S405 is for revising the valid data of gathering.Detailed process is:
Step 401: from driver test system, gather drive test data;
Step 402: data validity is judged, as step S303 among Fig. 3, invalid data is carried out filtering;
Step 403: effective drive test data is divided according to the zone, adopted different propagation models, select propagation model as step S104 among Fig. 1: 9999 propagation models and Urban propagation model; Active data also positions association, to determine the position;
Step 404: the relation of setting up propagation model parameter matrix A to be estimated, downlink path loss, descending received power.Be example with 9999 propagation models, see Table 4:
Table 4 9999 propagation model parameter tables
If the drive test data sampled point be Xi (as being described as of sampled point: Beijing National Library), P (Xi) is the actual test downstream signal intensity level of this data sampling point, and P ' is the cell transmit power of this sampled point association (Xi),
Be this data sampling point Xi data (data as sampling comprise data such as longitude and latitude), the propagation model parameter matrix is A, calculates downstream signal intensity level theoretical value Q (Xi) according to propagation model:
Wherein
Be the downlink path loss;
In sampled point Xi data comprise: the Back ground Information that gather to the horizontal range of sampled point, antenna height etc. from OMC the base station; Down receiving signal intensity=base station transmitting power-downlink path loss;
Step 405: based on the parameter Estimation of linear least-squares algorithm, obtain the propagation model parameter matrix A:
Formula 2
Namely
Be tending towards the minimum convergence of following formula under the situation of magnanimity in sampled value, the propagation model curve match success that characterizes of parameter matrix A just and be worth uniquely, model parameter is the highest to the matching degree of network.
Present embodiment is illustrated concrete propagation model makeover process, obtains revised propagation model, and network coverage situation is carried out accurate Calculation.After having obtained revised propagation model, can obtain
Downlink path loss calculated value, thereby obtain the actual downstream signal strength signal intensity=base station transmitting power-downlink path loss of sampled point.Because it is more accurate to revise the downlink path loss of calculating the back, therefore, the downstream signal receiving intensity of each sampled point is more accurate.
Embodiment five
Above each embodiment processes such as collection, correction are given an example, in actual applications, revised Internet communication model can also obtained, calculate under the signal actual strength situation, further present in modes such as data map by following manner, concrete present embodiment covers to present to subsequent network and exemplifies, and process is:
Step 1: default base station (residential quarter) and the repeater indoor distributed system file format that presents the needs importing, as following table 5;
Table 5 base station (residential quarter) and repeater indoor distributed system file format table
| Cell | HBA024- HBA024A | HBA024- HBA024B | HBA024- HBA024C | HBA025- HBA025A |
| txPowerDl | 33 | 33 | 33 | 33 |
| maxTxPowerUl | 24 | 24 | 24 | 24 |
| qRxLevMin | -103 | -103 | -103 | -103 |
| System type | GSM_900 | GSM_900 | GSM_900 | GSM_900 |
| Propagation model | 9999-GSM_900 | 9999-GSM_900 | 9999-GSM_900 | 9999-GSM_900 |
| Lobe width | 60 | 180 | 300 | 60 |
| The electrical tilt angle | 0 | 0 | 0 | 0 |
| Antenna height | 60 | 60 | 60 | 60 |
| The mechanical tilt angle | 3 | 3 | 3 | 3 |
| Longitude and latitude | 126.48432 /45.87345 | 126.48432 /45.87345 | 126.48432 /45.87345 | 126.557787 /45.864563 |
| Antenna type | 737115_902 | 737115_902 | 737115_902 | 737115_902 |
Wherein: txPowerDl is base station down transmitting power; MaxTxPowerUl is the maximum uplink transmission power of mobile phone; QRxLevMin is the minimum level that inserts; System type: the employed frequency band in residential quarter; Antenna type: the type that antenna in cell uses.TD residential quarter file format can be consistent with table 5.
Step 2:: the default antenna file format that presents the needs importing, TD antenna file format can be consistent with table 6:
Table 6 antenna file format table
| NAME | 085_2_18 | The antenna title |
| MAKE | Antennas’R’Us | Manufacturer |
| FREQUENCY | 900 | Frequency bandwidth |
| H_WIDTH | 85 | Horizontal lobe width |
| V_WIDTH | 10 | Vertical lobe width |
| FRONT_TO_BACK | 0 | The front and back ratio |
| GAIN | 19dBi | Antenna gain |
| TILT | MECHANICAL | Type has a down dip |
| COMMENTS | Standard 85-degree antenna | Additional description |
| HORIZONTAL 360 | 360 | The level decay |
| 0.0 | 0.0 | |
| 1.0 | 0.0 | |
| …… | …… | |
| 356.0 | 0.1 | |
| 357.0 | 0.1 | |
| 358.0 | 0.0 | |
| 359.0 | 0.0 | |
| VERTICAL | 360.0 | Vertical decay |
| 0.0 | 0.0 | |
| 1.0 | 0.0 | |
| 2.0 | 0.0 | |
| …… | …… | |
| 358.0 | 0.0 | |
| 359.0 | 0.0 |
Step 3: with base station, indoor distributed system basic data and antenna foundation data file, three-dimensional map, after propagation model imports according to above-mentioned form, can carry out coverage prediction, carry out the propagation model correction, prediction will be according to base station geographic position, transmitting power, and geomorphological environment influences radio transmission and makes path loss analysis accurately around considering, draws the signal strength values of each point;
Step 4: after drawing the signal strength values of each point, can also further according to table 1 network coverage be presented user's perception by colour code, carry out signal strength signal intensity and quantize.
The various embodiments described above utilize OMC to extract base station, repeater indoor distributed system, antenna data, select different propagation models at different pieces of information, utilize the driver test system data that radio transmission model is proofreaied and correct, according to the perception under user's different business coverage diagram is carried out color quantizing and supports associative search, have applied range, have the advantage of practical application request and zero cost, saving vehicle and manpower.
Embodiment six
Fig. 5 is the example structure schematic diagram that the present invention is based on the network overlay system of propagation model, as shown in Figure 5, comprise data acquisition module 2, base station property sort module 4, propagation model revision module 6, quantization modules 8, association search module 9, function and the implementation procedure to each module illustrates respectively below:
Acquisition module 2, for the Back ground Information of gathering base station, antenna and repeater indoor distributed system the mobile communication system from OMC, and from associated datas such as driver test system collection downstream signal intensity.
Base station property sort module 4, the basic information data that is used for gathering is according to overlay area ownership classification, as: by " XXX economizes the local resource database " of the last cell data that extracts of OMC and table 3 compared, according to information in " XXX economizes the local resource database ", identify base station property, press base station property select different propagation models as, the valid data of gathering are divided into two classes by base station property, dense city and suburb are selected Urban model and 9999 propagation models respectively; The repeater indoor distributed system is adopted the Urban model.By the base station property in the identification drive test data, road test data is classified, in order to two kinds of propagation models are revised.
Propagation model revision module 6 is used for according to the sampled data file of having gathered the propagation model of having selected being revised.Particularly:
1. utilize residential quarter (also being the base station) identification code and broadcast channel sign road test data to identify screening, will carry out association from same sectors of data, generation comprises longitude and latitude, broadcast channel signal intensity, the received power intensity level, cell ID, the file of information such as broadcast channel sign.
2. for avoiding with causing the sector erroneous judgement with sign indicating number frequently, with cause propagation model revision inaccurate from base station distance close to too, preset distance and signal strength threshold value surpass or are lower than less than certain thresholding, received power intensity the data point of certain threshold value as step S301-303 filtering distance among Fig. 3.Carry out rapid fading filtering processing to receiving power signal intensity, eliminate the rapid fading influence, obtain the local mean value of received power.
3. basis is from effective downstream signal intensity of each sector of trackside system acquisition and the Back ground Information (comprising antenna parameter, base station height, latitude and longitude information etc.) of base station and repeater indoor distributed system, utilize least-squares algorithm, make the absolute difference of valid signal strengths value in theoretical signal strength values and the actual drive test data be tending towards infinitely small, thereby the propagation model parameter matrix that obtains revising is finished the correction of propagation model.
Quantization modules 8 is used for that network coverage situation is carried out signal strength signal intensity and quantizes, particularly:
The cell basis data that to from OMC, gather, the antenna data of the employed antenna type correspondence in each base station and the three-dimensional map that comprises various geomorphic types import according to the form of embodiment five; The propagation model that adopts propagation model revision module 6 to proofread and correct carries out coverage prediction, prediction will be according to base station geographic position, transmitting power, consider on every side geomorphological environment to radio transmission influence make path loss analysis accurately, draw the signal strength condition of each point.Wherein dense city adopts the Urban model after proofreading and correct, and adds the repeater indoor covering is predicted; The suburb adopts 9999 propagation models after proofreading and correct to predict.According to the influence of signal strength signal intensity to user's perception, as shown in table 1, the signal strength signal intensity coverage diagram is represented with different colours respectively by the unlike signal intensity interval the different different user's perception of color representative forms and quantizes network coverage figure.
Association search module 9 is for the association search of realizing network coverage figure, as demonstrating the signal coverage varies that the user wants the region of search intuitively.
Particularly, two-dimentional geographical image sequence can be gathered in association search module 9 inside, namely gathers to have geographical location information, and the two-dimentional geographical image sequence that front and back information is continuous, acquisition precision can adopt 5 * 5 meters.In the network overlay system server, set up the geographical location information data storehouse that comprises two-dimentional geographical image sequence, with the related coupling with each image sequence of longitude and latitude, it is related that expressway, highway, national highway, urban road, urban landmark building etc. and longitude and latitude carry out, and searches for generally or inquire about supporting.By geographical location information (longitude, latitude) with the geographical image sequence of two dimension with quantize network coverage figure carry out related, in the geographical image sequence of two dimension, to show the network coverage situation that quantizes.Can position by keyword or longitude and latitude etc. during by 9 user searchs of association search module, so that understanding is from the signal coverage varies of region of search.
Present embodiment can realize that GSM and TD covering present: adopt OMC to go up the base station, antenna, repeater indoor distributed system data are also carried out propagation model according to the landforms characteristics of interest region and are mixed calculating, form the network overall signal intensity covering that can quantize perception by magnanimity drive test data correction propagation model and present figure, and support to inquire about based on longitude and latitude, the expressway, highway, national highway, the fuzzy query of urban road, urban landmark building and village, village fuzzy query, so that attendant, the contact staff, the market staff can be by this system from safeguarding, complaint handling, the promoting service equal angles stands in the height awareness network of the overall situation for the influence of perception, quick localization process network problem.
Detailed processes such as the data acquisition module 2 of present embodiment system, base station property sort module 4, propagation model revision module 6, quantization modules 8 also can be referring to the related description of method embodiment, no longer same or similar content is repeated in this description at this.
Embodiment seven
Fig. 6 the present invention is based on the embodiment schematic diagram that association search location and position present in the network coverage modification method of propagation model and the system.As shown in Figure 6, its concrete implementation step is:
Step S601: by geographical longitude and latitude positional information that the geographic pattern sequence is related with quantification network coverage figure, can be based on the electronic chart form (tab) of electronic chart standard (mapinfo);
Step S602: set up the geographical location information data storehouse;
Step S603: but carry out the classification of user's queried for items according to the content in the geographical location information data storehouse, provide the user to import required information inquiring, as keyword, longitude and latitude etc.;
Step S604: but in the geographical location information data storehouse, carry out the associative search algorithm of user's data query, from this geographical location information data storehouse, obtain the result of the search of Query Information;
Step S605: according to the longitude and latitude of Query Information, thereby navigate to network coverage figure, to quantize demonstration.
In sum, various embodiments of the present invention are based on the network coverage method of propagation model, utilize driver test system magnanimity drive test data, propagation model is accurately revised, the network coverage present situation that has reflected nature of radio propagation and the influence of radio transmission has been brought along with urban construction, environmental change, and propose to present and to support about GSM and the TD network coverage method of correlation inquiry, have and present accurate, applied range, the low advantage of minimizing manpower on-the-spot test cost.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the network coverage modification method based on propagation model is characterized in that, comprising:
Extraction comprises the basic information data of base station, repeater indoor distributed system and antenna;
Various described basic information datas are carried out the zone divide, and select corresponding propagation model to carry out coverage prediction;
According to the downstream signal intensity of from driver test system, extracting and described basic information data the described propagation model of selecting is revised;
Described various basic information datas are carried out the zone divide, and select corresponding propagation model to carry out coverage prediction to comprise:
Described base station and antenna data are divided into dense city and suburb according to the overlay area, adopt Urban propagation model and 9999 propagation models respectively;
Described repeater indoor distributed system is adopted the Urban propagation model;
The step of the described propagation model of selecting being revised according to the downstream signal intensity of extracting from driver test system and described basic information data comprises:
Calculate downstream signal intensity level theoretical value Q (Xi) according to propagation model:
Wherein Xi is sampled point, and P (Xi) is the actual test downstream signal intensity level of described sampled point, and P ' is the cell transmit power of this sampled point association (Xi),
Be the collection basic information data of described sampled point Xi, A is the propagation model parameter matrix,
Be the downlink path loss;
Based on least-squares algorithm propagation model is revised:
2. the network coverage modification method based on propagation model according to claim 1 is characterized in that, also comprises:
Calculate the downlink path loss according to revised described propagation model;
Down receiving signal intensity according to each point in the base station transmitting power in the described basic information data and the described path loss calculation network;
The network coverage that generation comprises signal strength values presents figure.
3. the network coverage modification method based on propagation model according to claim 2 is characterized in that, also comprises:
Perception influence according to user's different business quantizes the signal strength signal intensity that the described network coverage presents figure.
4. the network coverage modification method based on propagation model according to claim 2 is characterized in that, also comprises:
Geographical location information and the described network coverage are presented figure carry out relatedly, generate the geographical location information data storehouse;
According to user's information to be checked, from the Query Result of described geographical location information data library lookup association;
According to the geographical location information of information to be checked, described Query Result is positioned to the described network coverage presents figure.
5. the network coverage modification method based on propagation model according to claim 1 is characterized in that, the step of described extraction base station, repeater indoor distributed system and antenna foundation information data comprises:
OMC by base station and repeater indoor distributed system gathers described basic information data;
According to default data threshold scope the data validity of gathering is judged, obtained effective basic information data;
Described effective basic information data is carried out location association, determine described effective basic information data corresponding geographical location information.
6. the network coverage modification method based on propagation model according to claim 2 is characterized in that, gathers the Back ground Information of base station, antenna and repeater indoor distributed system in GSM and the TD mobile communication system;
According to revised described propagation model, generate GSM network and TD network two network of throwing the net and cover and present figure.
7. the network overlay system based on propagation model is characterized in that, comprising:
Data acquisition module is used for gathering the Back ground Information that comprises mobile communication system base station and repeater indoor distributed system, and extracts the downstream signal strength information from driver test system;
The base station property sort module, be used for Back ground Information according to overlay area ownership classification, select corresponding propagation model, specifically comprise: be divided into dense city and suburb according to base station property, select Urban model and 9999 propagation models respectively, described repeater indoor distributed system is adopted the Urban model;
The propagation model revision module is used for according to the downstream signal intensity of extracting from driver test system the described propagation model of having selected being revised, and obtains revised signal strength signal intensity, specifically comprises:
Calculate downstream signal intensity level theoretical value Q (Xi) according to propagation model:
Wherein Xi is sampled point, and P (Xi) is the actual test downstream signal intensity level of described sampled point, and P ' is the cell transmit power of this sampled point association (Xi),
Be the collection basic information data of described sampled point Xi, A is the propagation model parameter matrix,
Be the downlink path loss;
Based on least-squares algorithm propagation model is revised:
Quantization modules is used for according to the perception influence of user's different business the network coverage signal strength signal intensity that obtains after the propagation model revision module being quantized;
The association search module is used for association search is carried out in the network coverage of described quantification, obtains the signal coverage varies in searched zone.
8. the network overlay system based on propagation model according to claim 7, it is characterized in that described data acquisition module is gathered the Back ground Information of base station in the described mobile communication system, antenna and repeater indoor distributed system and gathered described downstream signal intensity from driver test system from OMC.
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