CN100502549C - Wireless communication network planning method - Google Patents
Wireless communication network planning method Download PDFInfo
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- CN100502549C CN100502549C CNB2006100335301A CN200610033530A CN100502549C CN 100502549 C CN100502549 C CN 100502549C CN B2006100335301 A CNB2006100335301 A CN B2006100335301A CN 200610033530 A CN200610033530 A CN 200610033530A CN 100502549 C CN100502549 C CN 100502549C
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Abstract
A method for Planning radio communication network includes confirming maximum region to be covered by base station according to user distribution state of coverage region and confirming pilot frequency power of the first carrier frequency (TFCF) based on confirmed region, obtaining emission power of TFCF according to ratio of pilot frequency to TFCF, confirming the most centralized region to be covered base station according to user distribution for confirming pilot frequency power and obtaining emission power of the second carrier frequency based on user power of the second carrier frequency confirmed as per user volume.
Description
Technical field
The present invention relates to a kind of method of the network planning of field of wireless communication, the method for the cordless communication network of code division multiple access (CDMA) technology is adopted in particular a kind of optimization.
Background technology
It is big, anti-interference that CDMA technology has a capacity, advantages such as soft handover, but the notable attribute of cdma wireless system is a cell breathing, promptly when user capacity increased in the sub-district, the covering of sub-district can be dwindled, so cdma system is complicated more in the network planning.
Under certain conditions, the capacity of cdma system can transform mutually with covering.That is to say when the covering of sub-district reduces, can have more capacity; And when the capacity of sub-district hangs down, can carry out more wide covering, so when planning, consideration that the sub-district covers and cell capacity must mutually combine.
Present base station is owing to adopted the multi-antenna diversity technology, and up covering is strengthened greatly; And for down transmitting power, owing to be subjected to the restriction of Linear Power Amplifier, be difficult to be greatly improved, particularly for the little base station system of outdoor overloading frequency, because restrictions such as volume heat radiations, the total transmitting power in base station is restricted, and a plurality of carrier frequency is shared descending gross power, the power that is assigned on each carrier frequency is lower, and the covering of each carrier frequency and capacity mainly are subject to descending power thus.
Therefore how rationally utilizing limited descending power is the emphasis of the cdma wireless network planning, in the overlay area of reality, a lot of scenes are the uneven areas of some user distributions, such as scenes such as small-sized cities and towns, small-business centers, be characterized in that the user mainly concentrates on the center, and regional edge customer amount is less.Traditional method for designing is to adopt the carrier frequency of two equal-wattages, and the center is covered to the edge comprehensively, and as shown in Figure 1, this down transmitting power of having relatively high expectations just can be finished covering.And improve the capacity of sub-district and the way of covering by strengthening descending power, can bring the complexity of cost increase and dilation process to increase.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of method of wireless communication network planning, technical problem to be solved is to lack the problem of rationally utilizing descending power in the prior wireless network planning, adopt novel wireless network planning method, do not increasing under the descending power condition, adopt new network plan method, make capacity and covering reach the optimization configuration, reduce the expense of operator, reduce equipment cost.
In order to achieve the above object, technical scheme of the present invention comprises:
A kind of method of wireless communication network planning, it may further comprise the steps:
A) according to the user distribution situation of overlay area, determine maximum region and number of users that the base station need cover, and determine the pilot power Pcpich1 of first carrier frequency thus, and account for the ratio n1 of the first carrier frequency gross power according to pilot power, obtain the transmitting power P1=Pcpich1/n1 of first carrier frequency;
B) according to the user distribution situation of overlay area, determine the concentrated area of capacity that the base station need cover, and its pilot power Pcpich2 is determined in the zone that definite thus second carrier frequency need cover, determine the second carrier frequency user power Pue according to user capacity, obtain the transmitting power P2=2*Pcpich2+Pue of second carrier frequency;
C), obtain the base station gross power according to the transmitting power of described first, second carrier frequency.
Described method wherein, also comprises:
According to the user distribution situation of overlay area carrier frequency more than two is set, the method to set up of the 3rd and above carrier frequency is with second carrier frequency, and its carrier frequency power reduces successively, the power sum that described base station gross power is each carrier frequency.
Described method, wherein, the ratio that the pilot power of first carrier frequency in the described step a) accounts for the first carrier frequency gross power is 20%-40%.
Described method, wherein, the ratio that the pilot power of second carrier frequency in the described step b) accounts for the second carrier frequency gross power is 5%-10%.
Described method, wherein, described wireless communication network is CDMA2000, WCDMA or TD-SCDMA cordless communication network.
The method of a kind of wireless communication network planning provided by the present invention, by adopting novel concentric circles planning, satisfied under the situation of covering and capacity requirement, save the effect of the transmitting power more than 50%, and reduced the expense of operator, reduce equipment cost, improved the performance of wireless system simultaneously.
Description of drawings
Fig. 1 is the wireless network two carrier cells planning schematic diagram of prior art;
Fig. 2 is the described two carrier cells planning schematic diagram of the inventive method;
Fig. 3 is the described user capacity distribution schematic diagram of the inventive method.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention further is described in detail below in conjunction with accompanying drawing.Wherein pilot power is determined according to actual coverage area territory scope, and it determines that method belongs to industry and knows technology, is not repeated.
The method of a kind of programming wireless communication network of the present invention, as shown in Figure 3, it may further comprise the steps:
A) network planning initial stage, the user distribution situation of investigation overlay area.
B) according to the maximum region of base station needs covering, determine the pilot power of first carrier frequency, pilot power accounts for 20%～40% of the first carrier frequency gross power, and concrete condition obtains the transmitting power of first carrier frequency thus by the decision of user distribution situation;
C) according to the first step and second step, can obtain zone that second carrier frequency need cover and should the zone in user capacity;
D) according to the overlay area of second carrier frequency, determine the pilot power of second carrier frequency, determine the second carrier frequency user power according to user capacity, finally obtain total transmitting power of second carrier frequency.
E), obtain the base station gross power according to the power of first, second carrier frequency.
If not new site, but carry out website upgrading, then above-mentioned steps b by increasing carrier frequency) in need to be provided with original carrier frequency and be set to first carrier frequency, its pilot power is constant, satisfies coverage requirement; Pilot power accounts for 20%～40% of the first carrier frequency gross power, and concrete condition obtains the transmitting power of first carrier frequency by the decision of user distribution situation.In the inventive method, the ratio that the pilot power of second carrier frequency in the described step b) accounts for the second carrier frequency gross power is 5%-10%
Above step at two carrier frequency describe, only be exemplary illustration, the inventive method is not limited to 2 carrier frequency, also can be provided with more than 2 carrier frequency.When being provided with more than two carrier frequency according to the user distribution situation of overlay area, the method to set up of the 3rd and above carrier frequency is with second carrier frequency, as the process in the step b), its carrier frequency power can reduce successively according to actual conditions, the power sum that described base station gross power is each carrier frequency.
The inventive method especially is adapted to the wireless network construction in the uneven area of user distribution, and typical area is as small-business district, small-sized cities and towns etc.This type of scene, near the customer volume in the center that is characterized in is bigger, based on Capacity design.And edge and regional customer volume in addition are low, only need wide the covering, to be covered as the master.Adopt the method for the invention, can optimize the downlink gross power, make to reach under covering and the user capacity requirement, save down transmitting power, thereby reduce equipment cost, save the networking expense, reduce the expense of operator.
The viewpoint that the inventive method can equivalent be treated according to cdma system capacity and covering, optimized down transmitting power, under the situation that minimizes descending power consumption, adopt two or more carrier cell concentric circles configurations to satisfy the maximum covering and the balance of heap(ed) capacity simultaneously, thus the operation cost of fundamentally having saved wireless network.When the Distribution Pattern of more multi-layered inferiorization is arranged in the overlay area, for example can the center be that the center of circle is when being divided into a plurality of concentric circles, can adopt more a plurality of carrier frequency at different concentric circles settings, thereby optimize the capacity and the covering of cordless communication network, improve the performance of wireless system.
First carrier frequency in the inventive method the foregoing description extensively covers application mainly as big zone, and as shown in Figure 3, its characteristics have less user in this overlay area, and user distribution density is little, and distribution is big, and pilot power is big.Second carrier frequency is mainly as the absorption of the high customer volume in the little overlay area.Be characterized in having more user in this overlay area, but user distribution is intensive, distribution is little, and pilot power is low.
Before more specifically embodiment of the present invention can consider the upgrading of two carrier frequency, frequency F1 was adopted in the base station, and transmitting power is P1, and pilot power is 0.1 * P1, and covering radius can reach R1, considered to disturb, and N1 UE capacity satisfied in cell load design 50%.
When adopting the inventive method to design, can adopt two carrier frequency, this moment, base station first carrier frequency power was 0.4 * P1, and pilot power is 0.1 * P1, so the coverage radius of cell of carrier frequency F1 still be R1, satisfied the UE capacity more than 0.2 * N1; The second carrier frequency F2 gross power, 0.1 * P1, pilot power is 0.01 * P1, and covering radius is 0.2 * R1, satisfies N2 UE capacity, because carrier frequency F2 does not have the adjacent area of other base stations to disturb, can be designed as higher load 60%, and user N2 is about 1.2N1.
After adopting the inventive method, under the situation of 50% transmitting power, cover under the constant situation, can improve power system capacity more than 40%.
Be illustrated in figure 2 as the network planning canonical schema that the inventive method is implemented, wherein carrier frequency 1 is twice than the covering radius of carrier frequency 2, and the user capacity of carrier frequency 1 is 25% of a carrier frequency 2.
The cordless communication network of the above-described employing CDMA technology in the inventive method includes but not limited to CDMA2000, WCDMA, TD-SCDMA cordless communication network.
Should be understood that above-mentioned description at the specific embodiment of the invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (5)
1, a kind of method of wireless communication network planning, this method is applied to the cordless communication network based on CDMA (Code Division Multiple Access), and this method may further comprise the steps:
A) according to the user distribution situation of overlay area, determine maximum region and number of users that the base station need cover, and determine the pilot power Pcpich1 of first carrier frequency thus, and account for the ratio n1 of the first carrier frequency gross power according to pilot power, obtain the transmitting power P1=Pcpich1/n1 of first carrier frequency;
B) according to the user distribution situation of overlay area, determine the concentrated area of capacity that the base station need cover, and its pilot power Pcpich2 is determined in the most concentrated zone of capacity that definite thus second carrier frequency need cover, user capacity according to the concentrated area of the capacity that covers is determined the second carrier frequency user power Pue, obtains the transmitting power P2=2*Pcpich2+Pue of second carrier frequency;
C), obtain the base station gross power according to the transmitting power of described first, second carrier frequency.
2, method according to claim 1 is characterized in that, also comprises:
According to the user distribution situation of overlay area carrier frequency more than two is set, the method to set up of the 3rd and above carrier frequency is with second carrier frequency, and its carrier frequency power reduces successively, the power sum that described base station gross power is each carrier frequency.
3, method according to claim 1 is characterized in that, the ratio that the pilot power of first carrier frequency in the described step a) accounts for the first carrier frequency gross power is 20%-40%.
4, method according to claim 1 is characterized in that, the ratio that the pilot power of second carrier frequency in the described step b) accounts for the second carrier frequency gross power is 5%-10%.
5, method according to claim 1 is characterized in that, described cordless communication network is CDMA2000, WCDMA or TD-SCDMA cordless communication network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100335301A CN100502549C (en) | 2006-02-13 | 2006-02-13 | Wireless communication network planning method |
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| CNB2006100335301A CN100502549C (en) | 2006-02-13 | 2006-02-13 | Wireless communication network planning method |
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| CN101022642A CN101022642A (en) | 2007-08-22 |
| CN100502549C true CN100502549C (en) | 2009-06-17 |
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| CNB2006100335301A Expired - Fee Related CN100502549C (en) | 2006-02-13 | 2006-02-13 | Wireless communication network planning method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101222748B (en) * | 2008-01-29 | 2010-12-29 | 中兴通讯股份有限公司 | Device and method for wireless network planning |
| CN101990212B (en) * | 2009-08-04 | 2013-08-07 | 中兴通讯股份有限公司 | Method and system for networking indoor and outdoor distribution systems |
| CN102083071B (en) * | 2009-11-30 | 2013-10-30 | 中国移动通信集团江苏有限公司 | Method and device for implementing frequency multiplexing by using subcell structure |
| CN102111865B (en) * | 2011-03-30 | 2014-09-10 | 中国联合网络通信集团有限公司 | Carrier frequency static power regulation method based on measurement report |
| CN102711131B (en) * | 2012-07-02 | 2015-01-07 | 厦门大学 | User distribution density-based covering and capacity optimization method in long term evolution (LTE) network |
| CN105898766B (en) * | 2016-06-22 | 2019-05-10 | 中国联合网络通信集团有限公司 | A kind of base station planning method and device |
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