Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-03-11
1998-07-28
Eisenzopf, Reinhard J.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 671, 455524, H04Q 736
Patent
active
057873500
DESCRIPTION:
BRIEF SUMMARY
A BACKGROUND OF THE INVENTION
The invention relates to a method for determining base station locations in an area which is subdivided into subareas, a subarea parameter being known per subarea.
Such a method is generally known and relates to human action. It involves so-called network planners determining base station locations by distributing base stations over the area intuitively or according to a fixed pattern. Then, with the aid of a so-called evaluation tool, for each subarea a (new) degree of coverage (a possible subarea parameter) is predicted, the effect of, inter alia, an aerial height to be used, an aerial type to be used and an amount of power to be emitted by a base station being checked at the same time. On the basis of the new predicted degree of coverage, the network planners then determine subsequent base station locations. The traffic capacity of each base station is set on the basis of so-called default values and/or on the basis of the insight of the network planners and may later be adjusted on the basis of practical experience and/or on the basis of predictions.
This has the drawback, inter alia, that such a known method is very labor-intensive and therefore expensive and time-consuming.
B SUMMARY OF THE INVENTION
An object of the invention is to provide a method of the type mentioned in the preamble which is less labor-intensive.
To this end, the method according to the invention is characterized in that, successively, parameter associated with a subarea and of a subarea parameter associated with at least one other subarea adjoining the subarea, station having an adjustment function, subarea value is adjusted on the basis of the adjustment function, and a subarea parameter associated with at least one other subarea adjoining said subarea is adjusted on the basis of the adjustment function, subarea parameter associated with a subarea and of a subarea parameter associated with at least one other subarea adjoining said subarea, a subsequent base station having a subsequent adjustment function, subsequent extreme subarea value is adjusted on the basis of the subsequent adjustment function, and a subarea parameter associated with at least one other subarea adjoining said subarea is adjusted on the basis of the subsequent adjustment function.
By, for example, storing, for each subarea, the subarea parameter (such as, for example, a coverage) in a data base and, for example, by means of a processor calculating the subarea value for each subarea, that subarea is found, in a manner which is readily automated, where the subarea value has an extreme value (minimum coverage). Because the subarea value is a function of both the subarea parameter associated with the subarea and of the parameters associated with adjoining subareas, the subarea associated with the extreme subarea value is very suitable as a base station location. Then the subarea associated with the extreme subarea value is assigned the base station having a corresponding adjustment function, which adjustment function results in adjustment of the subarea parameter associated with the subarea and of the subarea parameters associated with adjoining subareas, in a manner which is readily automated (raise in the value of the subarea parameter "coverage"). As a result of this adjustment, some subsequent subarea values should then be calculated, after which, again in a manner which is readily automated, the extreme subarea value is determined, etc. Thus the method according to the invention provides the option of virtually completely automated determination of base station locations, which method as a result is much less labour-intensive and thus less time-consuming and considerably cheaper in the long term.
The invention is based, inter alia, on the insight that it is possible, on the basis of subarea values which are each a function of a subarea parameter associated with the subarea and of subarea parameters associated with adjoining subareas, to find that subarea whose associated subarea value has an extreme value, and that this su
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W. Schelvis et al, "Interactive planning tool for cellular land mobile radio networks", Proceedings Fourth Nordic Seminar on Digital Mobile Radio Communications, Oslo 1990, cover page and pp. 1-6.
H. Witberg, "Planning Pan European Networks with CAESAR", Proceedings of the 3rd FITCE Congress, Strasbourg, 2-7 Sep. 1991, pp. 1-4 and 91.
C. Scarati et al., "Radio Coverage For Cellular Networks Planning: a Methodological Approach", IEEE 1993, pp. 940-945.
Buckers Robertus Johannes Leonardus
Noordhuis Jacob
van der Vorm Teun
Eisenzopf Reinhard J.
Koninklijke PTT Nederland N.V.
Michaelson Peter L.
Nguyen Lee
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