CN110519767A - A kind of NB-IoT coverage prediction method and device - Google Patents
A kind of NB-IoT coverage prediction method and device Download PDFInfo
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- CN110519767A CN110519767A CN201810488920.0A CN201810488920A CN110519767A CN 110519767 A CN110519767 A CN 110519767A CN 201810488920 A CN201810488920 A CN 201810488920A CN 110519767 A CN110519767 A CN 110519767A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Abstract
The embodiment of the present invention provides a kind of NB-IoT coverage prediction method and device.The method includes obtaining the first covering state under GSM900 network, the first covering state includes at least the first level of each grid；Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, and the covering mappings model includes at least NB-IoT network and GSM900 network in the level difference of each grid；According to the first level under the level difference of the covering mappings model and the first covering state, obtain the second covering state under NB-IoT network, the second covering state includes the second electrical level of each grid, the embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, cover state according to the grid of GSM900 network, thus quickly, simply, accurate the grid covering state predicted in NB-IoT network.
Description
Technical field
The present embodiments relate to wireless communication technique field more particularly to a kind of NB-IoT coverage prediction methods and dress
It sets.
Background technique
With the rapid development of internet of things service, China Mobile, connection open narrowband net (Narrow Band on a large scale
Internet of Things, NB-IoT) network construction.Current mobile NB-IoT network construction with the existing net whole world mainly by moving
Dynamic communication system (GlobalSystemforMobileCommunications, GSM900) co-sited mode is disposed, network construction at
This is low, and speed is fast.
Traditional LTE network coverage prediction mainly has following means: 1, being traversed and tested by road, acquire each existing net each position
Network coverage situation；2, it reports MR to report using existing network users, the covering of network each position is predicted by means such as ground physics and chemistry
Situation；For NB-IoT towards static Internet of Things network users, user does not have mobility, and agreement is not supported to switch, and only supports gravity treatment, gravity treatment
Opposite handover delay is larger, and development road traversal test, which is also easy to produce, leads to coverage prediction not to most strong cell because failing timely gravity treatment
Quasi- problem, and NB-IoT business is mostly smart meter reading, intelligent parking etc., covering scene differs greatly with road, road time
It is poor to go through test applicability.NB-IoT agreement does not support MR message, and user can not report MR to report, therefore can not support to pass through
NB-IoT terminal reports MR to predict the network coverage.
Network coverage status is excessively complicated to be predicted by the way of road traversal test to NB-IoT system, is needed a large amount of
Manpower, and obtained coverage prediction is not really accurate.
Summary of the invention
The embodiment of the present invention provides a kind of NB-IoT coverage prediction method and device, excessively multiple to solve the prior art
Miscellaneous, the coverage prediction for needing a large amount of manpower, and obtaining is not really accurate.
In a first aspect, the embodiment of the invention provides a kind of NB-IoT coverage prediction methods, comprising:
The first covering state under GSM900 network is obtained, the first covering state includes at least the first of each grid
Level；
Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, the covering mappings
Model includes at least NB-IoT network and GSM900 network in the level difference of each grid；
According to the first level under the level difference of the covering mappings model and the first covering state, NB-IoT network is obtained
Under second covering state, the second covering state includes the second electrical level of each grid.
Second aspect, the embodiment of the invention provides a kind of devices for NB-IoT coverage prediction method, comprising:
Module is obtained, for obtaining the first covering state under GSM900 network, the first covering state is included at least
First level of each grid；
Computing module obtains covering mappings mould for the transmission characteristic by comparing NB-IoT network and GSM900 network
Type, the covering mappings model include at least NB-IoT network and GSM900 network in the level difference of each grid；
Mapping block, for the first level under the level difference and the first covering state according to the covering mappings model,
The second covering state under NB-IoT network is obtained, the second covering state includes the second electrical level of each grid.
The third aspect, the embodiment of the invention also provides a kind of electronic equipment, comprising:
Processor, memory, communication interface and bus；Wherein,
The processor, memory, communication interface complete mutual communication by the bus；
The communication interface is for the information transmission between the communication equipment of the electronic equipment；
The memory is stored with the program instruction that can be executed by the processor, and the processor calls described program to refer to
Order is able to carry out following method:
The first covering state under GSM900 network is obtained, the first covering state includes at least the first of each grid
Level；
Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, the covering mappings
Model includes at least NB-IoT network and GSM900 network in the level difference of each grid；
According to the first level under the level difference of the covering mappings model and the first covering state, NB-IoT network is obtained
Under second covering state, the second covering state includes the second electrical level of each grid.
Fourth aspect, the embodiment of the invention also provides a kind of storage mediums, are stored thereon with computer program, the calculating
Machine program realizes following method when being executed by processor:
The first covering state under GSM900 network is obtained, the first covering state includes at least the first of each grid
Level；
Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, the covering mappings
Model includes at least NB-IoT network and GSM900 network in the level difference of each grid；
According to the first level under the level difference of the covering mappings model and the first covering state, NB-IoT network is obtained
Under second covering state, the second covering state includes the second electrical level of each grid.
NB-IoT coverage prediction method and device provided in an embodiment of the present invention, all cross establish NB-IoT network with
The internetwork covering mappings model of GSM900 covers state according to the grid of GSM900 network, thus quickly, simply, it is accurate
Predict the grid covering state in NB-IoT network.
Detailed description of the invention
Fig. 1 is the NB-IoT coverage prediction method flow chart of the embodiment of the present invention；
Fig. 2 is another NB-IoT coverage prediction method flow chart of the embodiment of the present invention；
Fig. 3 is the structural representation of the NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location of the embodiment of the present invention
Figure；
Fig. 4 is the apparatus structure schematic diagram for NB-IoT coverage prediction method of the embodiment of the present invention；
Fig. 5 is another apparatus structure schematic diagram for NB-IoT coverage prediction method of the embodiment of the present invention；
Fig. 6 is the electronic devices structure schematic diagram of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the NB-IoT coverage prediction method flow chart of the embodiment of the present invention, as shown in Figure 1, which comprises
Step S01, the first covering state under GSM900 network is obtained, the grid covering state includes at least each grid
First level of lattice.
Due to NB-IoT Web vector graphic 900M frequency range, propagation model feature and GSM900 network are essentially identical, and NB-IoT
Network mainly using with disposed by the way of GSM900 co-sited, path loss feature is also close with GSM900；The measurement report of GSM900
(Measurement Report) data are mostly from indoor user.Therefore the embodiment of the present invention internetwork is covered by establishing two kinds
Lid mapping model, to cover state, i.e., the first covering shape based on GSM900 to obtain the grid under the NB-IoT network
State.
Firstly, relying on main equipment producer according to data such as GSM900 network MR file, website work ginseng, base station configuration files
Or third party's tool obtains the first covering state, to realize the cover grid of GSM900 network by MR location algorithm
Physical and chemical present to lattice grade.GSM900 network grid it is physical and chemical after, the GSM network is made of multiple grids, described the obtained
The covering level value of each GSM900 cell under each grid, i.e. the first level are included at least in one covering state.
Step S02, covering mappings model is obtained by comparing the transmission characteristic of NB-IoT network and GSM900 network, it is described
Covering mappings model includes at least NB-IoT network and GSM900 network in the level difference of each grid.
Due to the performance of each equipment and the difference of transmission environment in NB-IoT network and GSM900 network, lead to two nets
The transmission characteristic of network is different, by the comparison to the transmission characteristic, available covering mappings model, for example, base station
Between emitting performance difference cause the covering power of cell different, and will lead to according to the difference of transmission environment and generate different biographies
Defeated loss, and gain reduction value etc. different in all directions is obtained according to the difference in the direction of Base Transmitter Antenna Design.It is logical
The analysis to two networks is crossed, the level difference between two networks in each grid is obtained, the level difference of all grids is distributed feelings
Condition obtains two internetwork covering mappings models after merging.
Step S03, it according to the first level under the level difference of the covering mappings model and the first covering state, obtains
The second covering state under NB-IoT network, the second covering state includes the second electrical level of each grid.
The first level in the first covering state and the level difference in the covering mappings model is superimposed, so that it may
To obtain the second electrical level of each grid under NB-IoT network.Finally obtaining lattice level is covered under NB-IoT network physics and chemistry is in
Existing grid covers state, i.e., the second covering state.
The embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, according to GSM900
The grid of network covers state, thus quickly, simply, accurate the grid covering state predicted in NB-IoT network.
Fig. 2 is another NB-IoT coverage prediction method flow chart of the embodiment of the present invention, and Fig. 3 is the embodiment of the present invention
The structural schematic diagram of NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location, as shown in Fig. 2, the step S02 is specific
Are as follows:
Step S021, by comparing the emitting performance of base station between the NB-IoT network and GSM900 network, NB- is obtained
IoT and the internetwork covering power difference of GSM900.
Since NB-IoT network is different from type of service handled by GSM900 network, although leading to the base station of two networks
Co-sited construction, but emitting performance also can according to the requirement of different service types different from, to both affect
Covering power.NB-IoT business is generally insensitive to time delay, can promote channel by introducing the coding mode for repeating to send
Transmission reliability when inclement condition brings the promotion of covering power to NB-IoT.But the NB-IoT network in power spectral density
Have no advantage compared to GSM900 network: GSM900 network is converted into level without pilot channel, all power；And NB-IoT network
Reference Signal Received Power (Reference Signal Receiving Power, RSRP) carry out self-generated reference signal
(Reference Signal, RS) power is averaged full bandwidth.NB-IoT agreement defines a port 1Port and two ends
Resource unit (Resource Element, RE) under mouth 2Port is as shown in table 1 below with the power relation of RS:
Table 1
| Port number | Transmission channel number | NB power (W) | RS power (W) |
| 1 | 1T | NB single channel power | NB single channel power/12 |
| 2 | 2T | 2*NB single channel power | NB single channel power/6 |
| 2 | 4T | 4*NB single channel power | NB single channel power/6 |
By the analysis to above-mentioned NB-IoT network base station emitting performance it is available its with the internetwork covering of GSM900
Ability difference.
Further, the step S021 specifically:
The covering power difference DELTA Power is obtained by following formula,
Δ Power=10 × log10(GSMPower)-10×log10(NBPower/ 12),
The wherein GSMPowerFor the transmission power of GSM900 network base station, the NBPowerFor the hair of NB-IoT network base station
Penetrate power.
Backstage passes through the transmission power GSM of the available GSM900 network base station of construction project data prestoredPowerAnd NB-
The transmission power NB of IoT network base stationPower, two internetwork covering power differences then can be obtained by by above-mentioned formula
ΔPower。
Step S022, it by comparing the transmission loss of base station and terminal between the NB-IoT network and GSM900 network, obtains
To NB-IoT and the internetwork transmission loss difference of GSM900.
Since NB-IoT network is applied to the internet of things service such as intelligent medical treatment, smart home, corresponding terminal more
With characteristics such as low-power consumption, low cost, Hypomobilities, the terminal in application environment and GSM network has biggish difference, so
Need to pay the utmost attention to the difference of the transmission loss of base station and terminal room in two networks, to obtain two internetwork transmission damages
Consume difference.
Further, the transmission loss difference includes at least penetration loss difference DELTA PL and over the air loss difference
It is worth Δ OTA.
The many because being known as of transmission loss can be influenced, wherein the factor being affected is that electromagnetic wave is propagated between building
Over the air caused by the penetration loss of Shi Fasheng and the surrounding enviroment of terminal (Over The Air, OTA) loss.
The factors such as specific penetration loss and specific building type, Radio wave incident angle degree are related.What partition wall stopped wears
Loss is generally 5~20dB thoroughly, and the loss of basement may reach 30dB or more.Especially in City scenarios, high building band
The penetration loss come can significantly affect covering.
By testing the GSM900 network terminal, the various fields such as more high levels, only high level, middle layer, low layer are chosen
Scape building carry out interior and sweep vertical test examination, and throughout corridor, corridor, stair, penetration loss result is in 18dB or so.With GSM900 network
It compares, the terminal of NB-IoT network is in the scene of more plus depth covering, such as basement, garage, light current well, elevator region,
Identical building are selected, the regions such as traversal basement, garage, light current well, elevator, fire-fighting stairway, building penetration loss average value is about
For 28.7dB.
Therefore compared with GSM900 network, NB-IoT network penetration loss wants much about 10dB, to obtain two networks
Between penetration loss difference DELTA PL take 10dB.It is of course also possible to it is different according to the application scenarios of different grids, choose corresponding wear
Loss difference thoroughly.
The over the air loss refers to that terminal compares the differential loss of ideal radiation source generation in use, general logical
Standard OTA test is crossed to obtain, in specific microwave dark room, the radiant power and receiving sensitivity of testing mobile phone.Terminal is different
The use habit of technique and Antenna Design and user, which can all be lost OTA, to be had an impact.
Traditional GSM terminal, being primarily upon the position on terminal and human hands head etc. influences, and is lost in human body, such as
3dB, on the basis of be further added by 4-6dB OTA loss.
And NB-IoT terminal local environment is more complicated, and it may be in electric meter box, the more complicated environment such as water meter case, OTA is lost more
Greatly, pass through more scene OTA standard testings, it is proposed that OTA is lost in 12dB or so.
Compared to GSM900 network, the over the air penetration loss difference DELTA OTA of the NB-IoT network is on the left side 6dB
It is right.
Step S023, by comparing the azimuth of transmitting antenna between the NB-IoT network and GSM900 network and having a down dip
Angle obtains NB-IoT and the internetwork antenna difference of GSM900.
Since antenna has fixed covering wave beam in horizontal and vertical directions, all directions have fixed gain, thus
Form the beam pattern of antenna.Although and NB-IoT network base station using with existing net GSM900 network co-sited deployment way build,
According to different covering demands, the transmitting antenna azimuth of NB-IoT network base station and angle of declination, i.e., respectively horizontal and vertical
Direction, the transmitting antenna with GSM900 network base station might not be consistent, needs to consider these in carrying out NB-IoT coverage prediction
Difference, to obtain NB-IoT and the internetwork antenna difference of GSM900.
Further, the step S023 specifically:
By comparing the azimuth of transmitting antenna and angle of declination between the NB-IoT network and GSM900 network, according to default
Backoff algorithm, obtain the NB-IoT and the internetwork antenna difference DELTA An of GSM900.
Pass through each angle in the available each transmitting antenna horizontal and vertical directions of the construction project data prestored
The gain reduction value of each degree of relative antenna normal direction.Therefore, by comparing now net GSM900 and NB-IoT network launches day
The azimuth of line and the difference of angle of declination inquire corresponding gain reduction value according to preset backoff algorithm, thus quantitative scoring
Calculate azimuth and the antenna difference DELTA An caused by angular difference that has a down dip.
For example, as shown in figure 3, NB-IoT antenna, GSM900 antenna, terminal location, wherein the terminal location is to pass through
After the processing of MR location algorithm, the position of equivalent terminal in each grid, thus according to the formula of backoff algorithm:
Δ An=F (a-e, b-f)-F (c-e, d-f),
Wherein a, c, e be respectively NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location in vertical direction with
The degree of antenna normal difference, b, d, f are respectively NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location in level side
The degree differed upwards with antenna normal, F () are to inquire corresponding gain reduction value according to the difference of wherein degree.
Step S024, the covering mappings are obtained according to the covering power difference, transmission loss difference and antenna difference
Model.
According to obtained NB-IoT network and the internetwork covering power difference DELTA Power of GSM900, transmission loss difference
Difference DELTA OTA and antenna difference DELTA An, available two nets is lost in middle penetration loss difference DELTA PL and over the air
Network each grid level difference, to obtain the covering mappings model.
The embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, wherein covering is reflected
Model is penetrated including at least covering power difference, transmission loss difference and antenna difference, is covered further according to the grid of GSM900 network
State, to quickly, simply, accurately predict the grid covering state in NB-IoT network.
Based on the above embodiment, further, the step S03 specifically:
The second electrical level of each grid in the second covering state under the NB-IoT network is obtained by following formula:
Second electrical level=the first level-Δ Power- Δ PL- Δ OTA- Δ An.
Covering power difference DELTA Power in the covering mappings module obtained based on the above embodiment, in transmission loss difference
Difference DELTA OTA and antenna difference DELTA An is lost in penetration loss difference DELTA PL and over the air, in conjunction with the first covering state
In each grid the first level, the second electrical level of each grid can be obtained by above formula.Again by summarizing, available institute
State the second covering state under NB-IoT cable.
The embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, according to GSM900
The grid of network covers state, thus quickly, simply, accurate the grid covering state predicted in NB-IoT network.
Fig. 4 is the apparatus structure schematic diagram for NB-IoT coverage prediction method of the embodiment of the present invention, as shown in figure 4,
Described device includes: to obtain module 10, computing module 11 and mapping block 12, wherein
The module 10 that obtains is used to obtain the first covering state under GSM900 network, and the first covering state is at least
The first level including each grid；The computing module 11 is used for the transmission by comparing NB-IoT network and GSM900 network
Characteristic obtains covering mappings model, and the covering mappings model includes at least NB-IoT network and GSM900 network in each grid
Level difference；The mapping block 12 is used for according to first under the level difference and the first covering state of the covering mappings model
Level, obtains the second covering state under NB-IoT network, and the second covering state includes the second electrical level of each grid.Tool
Body:
Module 10 is obtained according to data such as GSM900 network MR file, website work ginseng, base station configuration files, relies on main equipment
Producer or third party's tool obtain the first covering state, to realize the cover grid of GSM900 network by MR location algorithm
Physical and chemical present to lattice grade.GSM900 network grid it is physical and chemical after, the GSM network is made of multiple grids, described the obtained
The covering level value of each GSM900 cell under each grid, i.e. the first level are included at least in one covering state.The acquisition mould
Block 10 will obtain the first covering state and be sent to mapping block 12.
Computing module 11 obtains covering mappings model, institute by comparing the transmission characteristic of NB-IoT network and GSM900 network
The difference for stating transmission characteristic is caused by the performance of each equipment and the difference of transmission environment in two networks, for example, between base station
Emitting performance difference cause the covering power of cell different, and will lead to according to the difference of transmission environment and generate different transmission
Loss, and gain reduction value etc. different in all directions is obtained according to the difference in the direction of Base Transmitter Antenna Design.It is described
Computing module 11 obtains the level difference between two networks in each grid, by all grids by the analysis to two networks
Level difference distribution situation obtains two internetwork covering mappings models after merging.The computing module 11 is by the covering mappings
Model is sent to mapping block 12.
The mapping block 12 by obtained the first covering state the first level and the covering mappings model
In level difference it is superimposed, so that it may obtain the second electrical level of each grid under NB-IoT network.Finally obtain NB-IoT net
Lattice level is covered under network the physical and chemical grid presented covers state, i.e., the second covering state.
Device provided in an embodiment of the present invention for executing the above method, function with specific reference to above method embodiment,
Its specific method process repeats no more here.
The embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, according to GSM900
The grid of network covers state, thus quickly, simply, accurate the grid covering state predicted in NB-IoT network.
Fig. 5 is another apparatus structure schematic diagram for NB-IoT coverage prediction method of the embodiment of the present invention, such as Fig. 5 institute
To show, described device includes: the acquisition module 10, the computing module 11, the mapping block 12, the first computing unit 111,
Second computing unit 112, third computing unit 113 and polymerized unit 114, wherein
First computing unit 111 is used for the transmitting by comparing base station between the NB-IoT network and GSM900 network
Performance obtains NB-IoT and the internetwork covering power difference of GSM900；Second computing unit 112 is used for by comparing institute
The transmission loss for stating base station and terminal between NB-IoT network and GSM900 network obtains NB-IoT and the internetwork transmission of GSM900
Difference is lost；The third computing unit 113 is used for by comparing transmitting antenna between the NB-IoT network and GSM900 network
Azimuth and angle of declination, obtain NB-IoT and the internetwork antenna difference of GSM900；The polymerized unit 114 is used for according to institute
It states covering power difference, transmission loss difference and antenna difference and obtains the covering mappings model.Specifically:
First computing unit 111 can by the analysis to the NB-IoT network and the Base Transmitter performance of GSM900 network
To obtain two internetwork covering power differences.
Further, first computing unit 111 is specifically used for, and obtains the covering power difference by following formula
Δ Power,
Δ Power=10 × log10(GSMPower)-10×log10(NBPower/ 12),
The wherein GSMPowerFor the transmission power of GSM900 network base station, the NBPowerFor the hair of NB-IoT network base station
Penetrate power.
First computing unit 111 passes through the transmission power of the available GSM900 network base station of construction project data prestored
GSMPowerWith the transmission power NB of NB-IoT network base stationPower, then can be obtained by two by above-mentioned formula and internetwork cover
Lid ability difference DELTA Power, and it is sent to polymerized unit 114.
Second computing unit 112 is by comparing the difference of the transmission loss of base station and terminal room in two networks, to obtain
To two internetwork transmission loss differences.
Further, the transmission loss difference includes at least penetration loss difference DELTA PL and over the air loss difference
It is worth Δ OTA.
The many because being known as of transmission loss can be influenced, wherein the factor being affected is that electromagnetic wave is propagated between building
Over the air caused by the penetration loss of Shi Fasheng and the surrounding enviroment of terminal (Over The Air, OTA) loss.
The factors such as specific penetration loss and specific building type, Radio wave incident angle degree are related.What partition wall stopped wears
Loss is generally 5~20dB thoroughly, and the loss of basement may reach 30dB or more.Especially in City scenarios, high building band
The penetration loss come can significantly affect covering.
By testing the GSM900 network terminal, the various fields such as more high levels, only high level, middle layer, low layer are chosen
Scape building carry out interior and sweep vertical test examination, and throughout corridor, corridor, stair, penetration loss result is in 18dB or so.With GSM900 network
It compares, the terminal of NB-IoT network is in the scene of more plus depth covering, such as basement, garage, light current well, elevator region,
Identical building are selected, the regions such as traversal basement, garage, light current well, elevator, fire-fighting stairway, building penetration loss average value is about
For 28.7dB.
Therefore compared with GSM900 network, the NB-IoT network penetration loss wants much about 10dB, so that second calculates
Unit 112 obtains two internetwork penetration loss difference DELTA PL and takes 10dB, and is sent to polymerized unit 114.Certainly, described
Two computing units 112 can also be different according to the application scenarios of different grids, choose corresponding penetration loss difference.
The over the air loss refers to that terminal compares the differential loss of ideal radiation source generation in use, general logical
Standard OTA test is crossed to obtain, in specific microwave dark room, the radiant power and receiving sensitivity of testing mobile phone.Terminal is different
The use habit of technique and Antenna Design and user, which can all be lost OTA, to be had an impact.
Traditional GSM terminal, being primarily upon the position on terminal and human hands head etc. influences, and is lost in human body, such as
3dB, on the basis of be further added by 4-6dB OTA loss.
And NB-IoT terminal local environment is more complicated, and it may be in electric meter box, the more complicated environment such as water meter case, OTA is lost more
Greatly, pass through more scene OTA standard testings, it is proposed that OTA is lost in 12dB or so.
Compared to GSM900 network, the over the air that second computing unit 112 obtains NB-IoT network is penetrated
Difference DELTA OTA is lost in 6dB or so, and is sent to the polymerized unit 114.
Since antenna has fixed covering wave beam in horizontal and vertical directions, all directions have fixed gain, thus
Form the beam pattern of antenna.Although and NB-IoT network base station using with existing net GSM900 network co-sited deployment way build,
According to different covering demands, the transmitting antenna azimuth of NB-IoT network base station and angle of declination, i.e., respectively horizontal and vertical
Direction, the transmitting antenna with GSM900 network base station might not be consistent, and third computing unit 113 is carrying out NB-IoT covering in advance
It needs to consider these differences in survey, to obtain NB-IoT and the internetwork antenna difference of GSM900, and is sent to polymerized unit 114.
Further, the third computing unit 113 is specifically used for, according between the NB-IoT network and GSM900 network
The azimuth of transmitting antenna and the difference of angle of declination and preset backoff algorithm, obtain the NB-IoT and GSM900 network
Between antenna difference DELTA An.
Third computing unit 113 passes through the available each transmitting antenna horizontal and vertical two of construction project data prestored
The gain reduction value of each each degree of angle relative antenna normal direction on a direction.Therefore, the third computing unit 113 passes through
The existing net GSM900 and azimuth of NB-IoT network launches antenna and the difference of angle of declination of comparison, according to preset backoff algorithm come
Corresponding gain reduction value is inquired, thus quantitative computer azimuth angle and the antenna difference DELTA An caused by angular difference that has a down dip, and send
To polymerized unit 114.
For example, as shown in figure 3, NB-IoT antenna, GSM900 antenna, terminal location, wherein the terminal location is to pass through
After the processing of MR location algorithm, the position of equivalent terminal in each grid, thus according to the formula of backoff algorithm:
Δ An=F (a-e, b-f)-F (c-e, d-f),
Wherein a, c, e be respectively NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location in vertical direction with
The degree of antenna normal difference, b, d, f are respectively NB-IoT transmitting antenna, GSM900 transmitting antenna and terminal location in level side
The degree differed upwards with antenna normal, F () are to inquire corresponding gain reduction value according to the difference of wherein degree.
The polymerized unit 114 is according to obtained NB-IoT network and the internetwork covering power difference DELTA of GSM900
Penetration loss difference DELTA PL and over the air loss difference DELTA OTA and antenna difference in Power, transmission loss difference
Δ An, available two networks each grid level difference, to obtain the covering mappings model.
Device provided in an embodiment of the present invention for executing the above method, function with specific reference to above method embodiment,
Its specific method process repeats no more here.
The embodiment of the present invention is by establishing NB-IoT network and the internetwork covering mappings model of GSM900, according to GSM900
The grid of network covers state, thus quickly, simply, accurate the grid covering state predicted in NB-IoT network.
Fig. 6 is the electronic devices structure schematic diagram of the embodiment of the present invention.As shown in fig. 6, the electronic equipment, comprising: place
Manage device (processor) 601, memory (memory) 602 and bus 603；
Wherein, the processor 601 and the memory 602 complete mutual communication by the bus 603；
The processor 601 is used to call the program instruction in the memory 602, to execute above-mentioned each method embodiment
Provided method, for example, obtain the first covering state under GSM900 network, the first covering state includes at least
First level of each grid；Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model,
The covering mappings model includes at least NB-IoT network and GSM900 network in the level difference of each grid；According to the covering
The first level under the level difference of mapping model and the first covering state obtains the second covering state under NB-IoT network, institute
State the second electrical level that the second covering state includes each grid.
Further, the embodiment of the present invention discloses a kind of computer program product, and the computer program product includes depositing
The computer program in non-transient computer readable storage medium is stored up, the computer program includes program instruction, when described
When program instruction is computer-executed, computer is able to carry out method provided by above-mentioned each method embodiment, for example, obtains
The first covering state under GSM900 network is taken, the first covering state includes at least the first level of each grid；Pass through
The transmission characteristic for comparing NB-IoT network and GSM900 network obtains covering mappings model, and the covering mappings model includes at least
The level difference of NB-IoT network and GSM900 network in each grid；It is covered according to the level difference of the covering mappings model and first
The first level under cover shape state, obtains the second covering state under NB-IoT network, and the second covering state includes each grid
The second electrical level of lattice.
Further, the embodiment of the present invention provides a kind of non-transient computer readable storage medium, the non-transient calculating
Machine readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer execute above-mentioned each method embodiment institute
The method of offer, for example, obtain the first covering state under GSM900 network, the first covering state includes at least every
First level of a grid；Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, institute
It states covering mappings model and includes at least NB-IoT network and GSM900 network in the level difference of each grid；It is reflected according to the covering
The first level under the level difference and the first covering state of model is penetrated, the second covering state under NB-IoT network is obtained, it is described
Second covering state includes the second electrical level of each grid.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
The embodiments such as electronic equipment described above are only schematical, wherein it is described as illustrated by the separation member
Unit may or may not be physically separated, and component shown as a unit may or may not be object
Manage unit, it can it is in one place, or may be distributed over multiple network units.It can select according to the actual needs
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying wound
In the case where the labour for the property made, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of NB-IoT coverage prediction method characterized by comprising
The first covering state under GSM900 network is obtained, the first covering state includes at least the first electricity of each grid
It is flat；
Transmission characteristic by comparing NB-IoT network and GSM900 network obtains covering mappings model, the covering mappings model
Including at least NB-IoT network and GSM900 network each grid level difference；
According to the first level under the level difference of the covering mappings model and the first covering state, obtain under NB-IoT network
Second covering state, the second covering state includes the second electrical level of each grid.
2. the method according to claim 1, wherein described by comparing NB-IoT network and GSM900 network
Transmission characteristic obtains covering mappings model, and the covering mappings model includes at least NB-IoT network with GSM900 network each
The level difference of grid, specifically:
By comparing the emitting performance of base station between the NB-IoT network and GSM900 network, NB-IoT and GSM900 network are obtained
Between covering power difference；
By comparing the transmission loss of base station and terminal between the NB-IoT network and GSM900 network, obtain NB-IoT with
The internetwork transmission loss difference of GSM900；
By comparing the azimuth of transmitting antenna and angle of declination between the NB-IoT network and GSM900 network, obtain NB-IoT with
The internetwork antenna difference of GSM900；
The covering mappings model is obtained according to the covering power difference, transmission loss difference and antenna difference.
3. according to the method described in claim 2, it is characterized in that, the transmission loss difference includes at least penetration loss difference
Difference DELTA OTA is lost in Δ PL and over the air.
4. according to the method described in claim 2, it is characterized in that, described by comparing the NB-IoT network and GSM900 net
The azimuth of transmitting antenna and angle of declination between network obtain NB-IoT and the internetwork antenna difference of GSM900, specifically:
By comparing the azimuth of transmitting antenna and angle of declination between the NB-IoT network and GSM900 network, according to preset benefit
Algorithm is repaid, the NB-IoT and the internetwork antenna difference DELTA An of GSM900 are obtained.
5. according to the method described in claim 2, it is characterized in that, described by comparing the NB-IoT network and GSM900 net
The emitting performance of base station between network obtains NB-IoT and the internetwork covering power difference of GSM900, specifically:
The covering power difference DELTA Power is obtained by following formula,
Δ Power=10 × log10(GSMPower)-10×log10(NBPower/ 12),
The wherein GSMPowerFor the transmission power of GSM900 network base station, the NBPowerFor the transmitting function of NB-IoT network base station
Rate.
6. according to method as claimed in claim 3 to 5, which is characterized in that the level according to the covering mappings model
The first level under difference and the first covering state obtains the second covering state under NB-IoT network, the second covering state
Second electrical level including each grid, specifically:
The second electrical level of each grid in the second covering state under the NB-IoT network is obtained by following formula:
Second electrical level=the first level-Δ Power- Δ PL- Δ OTA- Δ An.
7. a kind of device for NB-IoT coverage prediction method characterized by comprising
Module is obtained, for obtaining the first covering state under GSM900 network, the first covering state includes at least each
First level of grid；
Computing module obtains covering mappings model, institute for the transmission characteristic by comparing NB-IoT network and GSM900 network
It states covering mappings model and includes at least NB-IoT network and GSM900 network in the level difference of each grid；
Mapping block is obtained for the first level under the level difference and the first covering state according to the covering mappings model
The second covering state under NB-IoT network, the second covering state includes the second electrical level of each grid.
8. device according to claim 7, which is characterized in that the computing module specifically includes:
First computing unit is obtained for the emitting performance by comparing base station between the NB-IoT network and GSM900 network
NB-IoT and the internetwork covering power difference of GSM900；
Second computing unit is damaged for the transmission by comparing base station and terminal between the NB-IoT network and GSM900 network
Consumption, obtains NB-IoT and the internetwork transmission loss difference of GSM900；
Third computing unit, for by compare between the NB-IoT network and GSM900 network the azimuth of transmitting antenna and under
Inclination angle obtains NB-IoT and the internetwork antenna difference of GSM900；
Polymerized unit, for obtaining the covering mappings according to the covering power difference, transmission loss difference and antenna difference
Model.
9. a kind of electronic equipment, which is characterized in that including memory and processor, the processor and the memory pass through always
Line completes mutual communication；The memory is stored with the program instruction that can be executed by the processor, the processor tune
The method as described in claim 1 to 6 is any is able to carry out with described program instruction.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
The method as described in claim 1 to 6 is any is realized when processor executes.
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