CN100446589C - Method and system for base station transmission power setting in wireless honeycomb network - Google Patents
Method and system for base station transmission power setting in wireless honeycomb network Download PDFInfo
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- CN100446589C CN100446589C CNB2006101156633A CN200610115663A CN100446589C CN 100446589 C CN100446589 C CN 100446589C CN B2006101156633 A CNB2006101156633 A CN B2006101156633A CN 200610115663 A CN200610115663 A CN 200610115663A CN 100446589 C CN100446589 C CN 100446589C
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Abstract
This invention relates to wireless communication beehive network base station emission power set method and its system, which comprises network database to store information through database to get current station range, wherein, according to current cover range, it computes station cover range according to new station through path consumption formula; then according to new station route consumption it determines emission power through base station consumption and emission power relationship.
Description
Technical field
The present invention relates to wireless communication field, particularly the base station is provided with technology in the wireless cellular network.
Background technology
Cellular technology is a kind of wireless communication technology.This technology is divided into several sub-districts to a geographic area, is called " honeycomb " (being cell), and therefore cellular technology gains the name.
A big geographic area is divided into a plurality of " honeycombs ", is in order to make full use of the limited wireless transmission frequency.Each group connects and all needs special frequency.For more session can be carried out simultaneously, the frequency that cellular system has distributed certain number for each " honeycomb " (being each little zone).Non-adjacent honeycomb can use identical frequency, and like this, finite wireless resources just can make full use of.Common cellular system comprises global system for mobile communications (Global System for Mobilecommunication is called for short " GSM ") and code division multiple access (Code Division Multiple Access is called for short " CDMA ") at present.
If distinguish according to function, cell mobile communication systems roughly can be divided three classes, that is: macrocellular, microcellulor and intelligent cellular.Next once macrocellular and microcellulor are briefly described.
The macrocellular technology is at first described.In the cell mobile communication systems, at the network operation initial stage, the main target of operator is to build large-scale macro cells, obtains big as far as possible ground domain coverage ratio, the covering radius of macro cells mostly is 1km～25km greatly, and its antenna for base station is done very highly as far as possible.
In the macrocellular of reality is little, exist two kinds of special tiny areas usually.The one, " blind spot ", owing to electric wave runs into the shadow region that barrier causes in communication process, this area communication quality is seriously inferior; The 2nd, " focus ", the heavy traffic zone that the uneven distribution of loading owing to space service forms, its supports the most of business in macrocellular.More than the solution of two " point " problem, often rely on ways such as repeater, division sub-district are set.Except the reason of economic aspect, in principle, these two kinds of methods can not unrestrictedly be used, because enlarged system's covering, communication quality will descend; Improve communication quality, often sacrificed capacity again.In recent years, along with user's increase, macro cells is carried out cell splitting, and it is more and more littler to become.Little to a certain degree the time when the sub-district, the cost of building a station will sharply increase, and dwindling also of radius of society can bring serious disturbance, and on the other hand, the blind area still exists, and the high traffic of hot zones also can't well be absorbed.
Compare with the macrocellular technology, the microcellulor technology has that coverage is little, through-put power is low and easy for installation flexibly etc. the covering radius of this sub-district is 30m～300m, and antenna for base station is lower than the roof height, propagate and mainly carry out along the sight line in street, signal is little in the leakage of roof.Microcellulor can be used as replenishing of macrocellular and extends, and the application of microcellulor mainly contains two aspects: the one, improve coverage rate, and be applied to the blind spot area that some macrocellulars are difficult to cover, as subway, basement; The 2nd, the raising capacity is mainly used in the high traffic area, as the commercial street of prosperity, shopping center, stadium etc.Microcellulor is general and macrocellular formation multilayer net when conduct improves the application of network capacity.Macrocellular carries out large-area covering, and as the bottom of multilayer net, microcellulor then continuous covering of small size is superimposed upon on the macrocellular, constitutes the upper strata of multilayer net, and the microcellulor sub-district is different sub-districts on system configuration with macro cells, and independently broadcast channel is arranged.
In the prior art, wireless cellular network is by operator's unified planning networking.Operator determines the division of sub-district in the network according to information such as coverage, capacity requirements, the coverage of each base station, base station site position, base station transmitting power etc. in the decision network.The network planning needs the professional according to the whole network unified planning, and the drive test information during adjoint network is optimized is adjusted base station parameter, thereby the cost of networking, specification requirement are all very high.On the basis of the macrocellular network that operator sets up, can be according to on-site wireless signal coverage condition, whether decision increases the microcellulor network, and newly-built relevant base station.Because the microcellulor network is not set up by operator is unified, therefore can't carry out the complicated drive test or the network planning, and leave the drive test and the network planning, coverage that can't fine definite base station, and the transmitting power of base station it.Make the transmitting power of newly-built base station produce interference to original base station easily.
Summary of the invention
In view of this, main purpose of the present invention is to provide method and the system thereof that base station transmitting power is provided with in a kind of wireless cellular network, make also can the transmitting power of newly-built base station not to be provided with, and set transmitting power can not produce interference to existing base station by the drive test and the network planning.
For achieving the above object, the invention provides the method that base station transmitting power is provided with in a kind of wireless cellular network, comprise following steps:
From the network data base of storing existing base station information, obtain the coverage of existing base station, calculate the coverage of newly-built base station according to the coverage of described existing base station;
According to the coverage of the described newly-built base station of calculating, calculate the path loss of described newly-built base station;
According to this newly-built base station path loss that calculates, calculate and be provided with the transmitting power of this newly-built base station.
Wherein, during greater than the coverage of newly-built base station expects, the coverage of described newly-built base station is got the coverage of this expection in the coverage of described calculating;
Calculate the path loss of described newly-built base station according to the coverage of this expection.
In this external described method, by path loss formula PL=F (f, d, ht, hr, terrain parameter) path loss of the described newly-built base station of calculating, this path loss formula is parameter with base station working frequency f, base station and terminal apart from d, base station antenna height ht, terminal antenna height hr and terrain parameter, the path loss of calculation base station; Wherein, base station and terminal distance is determined by the coverage of base station.
In this external described method, described base station working frequency, base station antenna height, terminal antenna height and terrain parameter are provided with personnel's input by the base station or obtain from described network data base.
In this external described method, calculate the transmitting power of newly-built base station by the relational expression of base station path loss and transmitting power, this relational expression is:
PL＝Ptx+Gant_t-Prx+Gant_r；
Wherein, PL is the path loss of base station;
Ptx is the transmitting power of base station;
Gant_t is the antenna gain of base station;
Gant_r is the antenna gain of terminal;
Prx is the receiving sensitivity of terminal;
Gant_t, Gant_r, Prx are provided with personnel's input by the base station or obtain from described network data base.
In this external described method, if the base station transmitting power that calculates greater than the maximum transmission power of described newly-built base station, then the transmitting power of described newly-built base station is this maximum transmission power.
In this external described method, if the base station transmitting power that calculates greater than the maximum transmission power of described newly-built base station, then described newly-built base station redefines its coverage according to this maximum transmission power.
In this external described method, described newly-built base station will comprise the base station information report network database of transmitting power and coverage.
The present invention also provides the system that base station transmitting power is provided with in a kind of wireless cellular network, comprises the network data base and the newly-built base station that are used to store existing base station information, also comprises:
Be used for obtaining the coverage of existing base station, and calculate the equipment of the coverage of this newly-built base station according to the coverage of the existing base station that is obtained from described network data base;
Be used for calculating the equipment of the path loss of this newly-built base station according to the coverage of this newly-built base station of calculating;
Be used for according to this newly-built base station path loss calculation that calculates and the equipment that the transmitting power of this newly-built base station is set.
Wherein, also comprise the equipment that the parameter information of described newly-built base station is saved in described network data base.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, comprise the network data base that is used to store existing base station information in the network, can obtain the coverage of existing base station by this network data base, coverage according to existing base station is calculated the coverage of newly-built base station, and further according to the coverage of newly-built base station, calculate the path loss of newly-built base station by the path loss calculation formula, then according to this newly-built base station path loss, by the relational expression of base station path loss and transmitting power, finally determine the transmitting power of this newly-built base station.Thereby need not to carry out the network planning or drive test, the transmitting power of newly-built base station can correctly be set by the information of preserving in the network equally, and, do not disturb thereby can not produce to existing base station owing in the process of determining transmitting power, combine the actual conditions of existing base station.
During greater than the coverage of newly-built base station expects, the coverage of newly-built base station is as the criterion with the coverage of this expection in the coverage of calculating, and avoids when existing base station distribution is unreasonable, determines to bring negative influence for newly-built base station range.
During greater than the maximum transmission power of newly-built base station, the transmitting power of newly-built base station is as the criterion with this maximum transmission power at determined base station transmitting power.The transmitting power that makes newly-built base station be provided with is no more than the emission maximum ability of this base station, guarantees the normal operation of base station.
When newly-built base station transmitting power changes its maximum transmission power into by determined value, redefine base station range according to this maximum power, coverage and the actual coverage of avoiding this newly-built base station to determine are not inconsistent, and guarantee the normal operation of newly-built base station.
After the transmitting power setting is finished, newly-built base station will comprise that the base station information report network database of transmitting power and coverage preserves, guarantee that information can upgrade in time in the network data base, the base station of building after making also can be provided with its transmitting power exactly according to the information in the network data base.
Description of drawings
Fig. 1 is the network diagram of base station transmitting power method to set up and system in the wireless cellular network of the present invention;
Fig. 2 is the method flow diagram that is provided with according to base station transmitting power in the wireless cellular network of first embodiment of the invention;
Fig. 3 is the system construction drawing that is provided with according to base station transmitting power in the wireless cellular network of second embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Core of the present invention is, in network, comprise the network data base that is used to store existing base station information, as shown in Figure 1, obtain the coverage of existing base station by this network data base, coverage according to existing base station is calculated the coverage of newly-built base station, and further according to the coverage of newly-built base station, calculates the path loss of newly-built base station by the path loss calculation formula, then by the relational expression of base station path loss and transmitting power, finally determine the transmitting power of this newly-built base station.Thereby need not to carry out the network planning or drive test, the transmitting power of newly-built base station can correctly be set by the information of preserving in the network equally.
According to inventive principle first embodiment of the invention is described below.
As shown in Figure 2, in step 201, newly-built base station obtains its relevant configuration information.Comprise the antenna height of base station, the antenna parameter of base station (as installation direction, directive gain, directional diagram etc.), the operating frequency of base station, the maximum transmission power ability of base station, the geographical location information of base station, the coverage of base station expects, the application conditions of base station: the terrain parameter of indoor or outdoors, base station (can from the applied environment of existing several quasi-representatives, select).These information can be provided with personnel by the base station and directly import or obtained automatically by the base station.
Then enter step 202, the base station is connected with the network data base of the existing base station information of storage, obtain the information of the existing base station of closing on, comprise the application conditions of the geographical location information of operating frequency, the adjacent base station of adjacent base station, the coverage information of adjacent base station (this information can by two dimension or three-dimensional map information stores), adjacent base station: indoor/outdoor.
Then enter step 203,, estimate the coverage of newly-built base station according to the coverage of the adjacent base station that obtains.Such as, can be no more than 10% by the coverage of newly-built base station and the overlapping area of adjacent base station coverage on every side and set, by the geometrical calculation method, calculate the coverage of newly-built base station according to antenna parameter.
Then enter step 204, whether the coverage of judge calculating is greater than the coverage of this newly-built base station expects, if greater than would enter step 205, coverage with this expection replaces the coverage of estimating, avoid when existing base station distribution is unreasonable, for newly-built base station range determine to bring negative influence, then enter step 206; If the coverage of calculating then directly enters step 206 smaller or equal to the coverage of expection.
In step 206,,, calculate the path loss of this newly-built base station by path loss formula PL=F (f, d, ht, hr, terrain parameter) according to the coverage of newly-built base station.This path loss formula is parameter with base station working frequency f, base station and terminal apart from d, base station antenna height ht, terminal antenna height hr and terrain parameter.During practical application, can this path loss calculation formula be specialized, come the realizing route loss to calculate according to prior art.Wherein, base station and terminal distance determined by the coverage of newly-built base station, and base station working frequency, base station antenna height and terrain parameter obtain from the base station is provided with the information of personnel's input, and the terminal antenna height can obtain from network data base.
Then enter step 207,,, calculate the transmitting power of this newly-built base station by the relational expression of base station path loss and transmitting power according to the path loss of this newly-built base station.The relational expression of this base station path loss and transmitting power is: PL=Ptx+Gant_t-Prx+Gant_r, and wherein, PL is the path loss of base station; Ptx is the transmitting power of base station; Gant_t is the antenna gain of base station; Gant_r is the antenna gain of terminal; Prx is the receiving sensitivity of terminal.In actual applications, the base station path loss that can calculate by previous step in conjunction with the antenna gain of base station and terminal and the receiving sensitivity of terminal, is derived the transmitting power of newly-built base station.The antenna gain of base station can obtain according to antenna for base station parameter (comprising installation direction, directive gain, directional diagram) in the relational expression, and indexs such as the receiving sensitivity of terminal, antenna gain are fixed values in same system, can obtain from network data base.
Then enter step 208, judge that the base station transmitting power calculate is whether greater than the maximum transmission power of this newly-built base station, if greater than would enter step 209, according to this maximum transmission power the setting of transmitting power is carried out in this newly-built base station, guarantee that the transmitting power of newly-built base station setting is no more than the emission maximum ability of this base station, guarantee the normal operation of base station, then enter step 211; Otherwise then enter step 210, the transmitting power setting is carried out in newly-built base station according to this transmitting power that calculates.As seen do not carrying out under the situation of the network planning or drive test, the transmitting power of newly-built base station can correctly be set by the information of preserving in the network equally, and, do not disturb thereby can not produce to existing base station owing in the process of determining transmitting power, combine the actual conditions of existing base station.
In step 211, according to the maximum transmission power of newly-built base station, redefine its actual coverage, coverage and the actual coverage of avoiding this newly-built base station to determine are not inconsistent, and guarantee the normal operation of newly-built base station.
Then enter step 212, the base station information that will comprise transmitting power and coverage is stored in network data base, guarantee that information can upgrade in time in the network data base, the base station of building after making also can be provided with its transmitting power exactly according to the information in the network data base.If newly-built base station transmitting power is the transmitting power that calculates, then this transmitting power and original coverage of calculating are stored in network data base; If the transmitting power of newly-built base station is a maximum transmission power, then maximum transmission power and the coverage that redefines are stored in network data base, guarantee the accuracy of information in the network data base.
In the present embodiment, the calculating of the calculating of coverage, the calculating of path loss and transmitting power and be provided with and in newly-built base station or network data base, carry out, if in newly-built base station, carry out, then the base station needs to comprise the base station information report network database of transmitting power and coverage in step 212, preserve by network data base, if in network data base, realize, then can directly preserve by it.In whole transmitting power setting up procedure, except needs manually participated in the part input, other step all can be cooperated with network data base by newly-built base station to be finished, thereby simplifies artificial workload.In addition, need many information of artificial input also can obtain automatically, as can obtaining geographical location information, can obtain maximum transmit power information etc. from the setting of base station producer according to supporting global positioning system (Global Position System, be called for short " GPS ").
Below base station transmitting power in the second embodiment of the invention wireless cellular network being provided with system describes, as shown in Figure 3, in the wireless cellular network base station transmitting power be provided with system comprise the network data base that is used for storing existing base station information, newly-built base station and: be used for obtaining the coverage of existing base station, and calculate the coverage computing equipment of the coverage of this newly-built base station according to the coverage of the existing base station that is obtained from network data base; Be used for calculating the path loss calculation equipment of the path loss of this newly-built base station according to the coverage of calculating; Be used for equipment being set according to this newly-built base station path loss calculation and the transmitting power that the transmitting power of this newly-built base station is set; Be saved in the reporting equipment of network data base with parameter information with newly-built base station.
Specifically, base station transmitting power is provided with in the system in wireless cellular network, from network data base, obtain the coverage of existing base station by the coverage computing equipment, calculate the coverage of this newly-built base station according to the coverage of the existing base station that is obtained, and estimated coverage is passed to path loss calculation equipment.Further according to this coverage,, calculate the path loss of this newly-built base station by path loss calculation equipment, and result of calculation is passed to transmitting power equipment is set by the path loss formula.Transmitting power is provided with the path loss that equipment calculates according to computing equipment, relational expression by base station path loss and transmitting power, extrapolate this rational transmitting power in newly-built base station, and newly-built base station is carried out the setting of transmitting power according to this transmitting power, accomplish need not to carry out the network planning or drive test, the transmitting power of newly-built base station can correctly be set by the information of preserving in the network equally.And, do not disturb thereby can not produce to existing base station owing in the process of determining transmitting power, combine the actual conditions of existing base station.Transmitting power is provided with equipment after finishing power setting, triggering reports memory module will comprise that the parameter information of this newly-built base station of transmitting power and coverage is saved in network data base, guarantee that information can upgrade in time in the network data base, the base station of building after making also can be provided with its transmitting power exactly according to the information in the network data base.
Wherein, path loss formula PL=F (f, d, ht, hr, terrain parameter) is parameter with base station working frequency f, base station and terminal apart from d, base station antenna height ht, terminal antenna height hr and terrain parameter, the path loss of calculation base station.Base station and terminal distance are determined that by the coverage of base station base station working frequency, base station antenna height, terminal antenna height and terrain parameter are provided with personnel's input by the base station or obtain from network data base.
The relational expression of base station path loss and transmitting power is: PL=Ptx+Gant_t-Prx+Gant_r.Wherein, PL is the path loss of base station, and Ptx is the transmitting power of base station, and Gant_t is the antenna gain of base station, and Gant_r is the antenna gain of terminal, and Prx is the receiving sensitivity of terminal.Wherein, Gant_t, Gant_r and Prx are provided with personnel's input by the base station or obtain from network data base.
What deserves to be mentioned is, said coverage computing equipment, path loss calculation equipment, transmitting power are provided with equipment and reporting equipment is a logical concept in second execution mode, physically can in distinct device, realize, also can in same equipment, realize, or directly in the base station, realize.Above-mentioned each equipment can have various titles, as long as but have above-mentioned functions and just can realize effect of the present invention, just belong to protection scope of the present invention.Be appreciated that, it mainly is calculating coverage, calculating path loss that coverage computing equipment, path loss calculation equipment, transmitting power are provided with function related in equipment and the reporting equipment, transmitting power is set and information reports storage, these functions all are not difficult to realize by known technology, are that present prior art does not realize purpose of the present invention by the inventive combination of these functions.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. the method that base station transmitting power is provided with in the wireless cellular network is characterized in that, comprises following steps:
From the network data base of storing existing base station information, obtain the coverage of existing base station, calculate the coverage of newly-built base station according to the coverage of described existing base station;
According to the coverage of the described newly-built base station that calculates, calculate the path loss of described newly-built base station;
According to this newly-built base station path loss that calculates, calculate and be provided with the transmitting power of this newly-built base station;
Wherein, calculate the transmitting power of newly-built base station by the relational expression of base station path loss and transmitting power, this relational expression is:
PL＝Ptx+Gant_t-Prx+Gant_r；
Wherein, PL is the path loss of base station;
Ptx is the transmitting power of base station;
Gant_t is the antenna gain of base station;
Gant_r is the antenna gain of terminal;
Prx is the receiving sensitivity of terminal;
Gant_t, Gant_r, Prx are provided with personnel's input by the base station or obtain from described network data base.
2. the method that base station transmitting power is provided with in the wireless cellular network according to claim 1, it is characterized in that, during greater than the coverage of newly-built base station expects, the coverage of described newly-built base station is got the coverage of this expection in the coverage of described calculating;
Calculate the path loss of described newly-built base station according to the coverage of this expection.
3. the method that base station transmitting power is provided with in the wireless cellular network according to claim 1, it is characterized in that, calculate the path loss of described newly-built base station according to base station working frequency, base station and terminal distance, base station antenna height, terminal antenna height and terrain parameter; Wherein, base station and terminal distance is determined by the coverage of base station.
4. the method that base station transmitting power is provided with in the wireless cellular network according to claim 3, it is characterized in that described base station working frequency, base station antenna height, terminal antenna height and terrain parameter are provided with personnel's input by the base station or obtain from described network data base.
5. the method that base station transmitting power is provided with in the wireless cellular network according to claim 1, it is characterized in that, if the base station transmitting power that calculates is greater than the maximum transmission power of described newly-built base station, then the transmitting power of described newly-built base station is this maximum transmission power.
6. the method that base station transmitting power is provided with in the wireless cellular network according to claim 5, it is characterized in that, if the base station transmitting power that calculates is greater than the maximum transmission power of described newly-built base station, then described newly-built base station redefines its coverage according to this maximum transmission power.
7. the method that is provided with according to base station transmitting power in each described wireless cellular network in the claim 1 to 6 is characterized in that described newly-built base station will comprise the base station information report network database of transmitting power and coverage.
8. the system that base station transmitting power is provided with in the wireless cellular network is characterized in that, comprises the network data base and the newly-built base station that are used to store existing base station information, also comprises:
Be used for obtaining the coverage of existing base station, and calculate the equipment of the coverage of this newly-built base station according to the coverage of the existing base station that is obtained from described network data base;
Be used for calculating the equipment of the path loss of this newly-built base station according to the coverage of this newly-built base station of calculating;
Be used for according to this newly-built base station path loss calculation that calculates and the equipment that the transmitting power of this newly-built base station is set;
Wherein, calculate the transmitting power of newly-built base station by the relational expression of base station path loss and transmitting power, this relational expression is:
PL＝Ptx+Gant_t-Prx+Gant_r；
Wherein, PL is the path loss of base station;
Ptx is the transmitting power of base station;
Gant_t is the antenna gain of base station;
Gant_r is the antenna gain of terminal;
Prx is the receiving sensitivity of terminal;
Gant_t, Gant_r, Prx are provided with personnel's input by the base station or obtain from described network data base.
9. the system that base station transmitting power is provided with in the wireless cellular network according to claim 8 is characterized in that, also comprises
The parameter information of described newly-built base station is saved in the equipment of described network data base.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006218A1 (en) * | 1992-09-04 | 1994-03-17 | Telefonaktiebolaget Lm Ericsson | A method and apparatus for regulating transmission power |
| US20030053432A1 (en) * | 1996-10-29 | 2003-03-20 | Qualcomm Incorporated | Method and apparatus for providing high speed data communications in a cellular environment |
| CN1744452A (en) * | 2004-08-31 | 2006-03-08 | 西门子（中国）有限公司 | Method for real-time computing path loss in mobile communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006218A1 (en) * | 1992-09-04 | 1994-03-17 | Telefonaktiebolaget Lm Ericsson | A method and apparatus for regulating transmission power |
| US20030053432A1 (en) * | 1996-10-29 | 2003-03-20 | Qualcomm Incorporated | Method and apparatus for providing high speed data communications in a cellular environment |
| CN1744452A (en) * | 2004-08-31 | 2006-03-08 | 西门子（中国）有限公司 | Method for real-time computing path loss in mobile communication system |
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