US 7,079,844 B2 · Base-station cell design method and base-station cell design apparatus, and program thereof in mobile communication system

Abstract

The above base-station cell design method is for sequentially adding base stations, and a technique of which throughput is few is employed for a radio-wave propagation characteristic evaluation to be made in this addition, and a technique of which the throughput is much, but which is of high-precision, more specifically, a technique such as the ray tracing is applied for the radio-wave propagation characteristic evaluation to be made after addition. The result of the high-precision radio-wave propagation characteristic evaluation to be made after this addition is put to practical use for estimating an interference quantity in selecting the arrangement location of the base station to be added newly. This allows the quantity of the radio wave analytic processing, which accounts for a large majority of the base-station cell design processing, to be reduced, thus enabling a fast base-station cell design.

Claims61

Dependent claims

A base-station cell design method in a mobile communication

system, wherein a service area, and a traffic density distribution within this service area are given to locate base stations within the above service area, said base-station cell design method characterized in including a base-station layout decision step of sequentially deciding until traffic coverage ratio exceeds desired traffic coverage ratio and said traffic coverage ratio is defined as a rate of a total traffic quantity absorbed by the base stations to all the traffic quantity that occurs within said service area,
said layout decision step comprising:
a step of calculating a traffic absorption quantity and a communication quality value in each of candidate locations of said base station;
an objective-function calculation step of calculating a predetermined objective-function responding to the quantity and the value that are this calculated result;
and
a step of selecting a layout at which the base station is installed responding to this objective-function.

3 more elements

A computer-readable medium storing a program for causing a computer to execute a base-station cell design method in a mobile communication system, wherein a service area, and a traffic density distribution within this service area are given to arrange a base station within the above service area, said program characterized in including a base-station layout decision step of, with a rate of a total traffic quantity that can be absorbed by the base stations arranged within said service area to all traffic quantity that occurs within said service area taken as a traffic coverage ratio, sequentially deciding layouts at which the base station is installed until said traffic coverage ratio exceeds a desired traffic coverage ratio,

said base-station layout decision step comprising:
step of calculating a traffic absorption quantity and a communication quality value in each of said base-station candidate locations;
an objective-function calculation step of calculating a predetermined objective-function responding to the quantity and the value that are this calculated result;
and
a step of selecting the layout at which the base station is installed responding to this objective-function.

2 more elements

Dependencies are inferred from the claim text.

Base-station cell design method and base-station cell design apparatus, and program thereof in mobile communication system

Life of this patent

Base-station cell design method and base-station cell design apparatus, and program thereof in mobile communication system

Life of this patent

Abstract

Claims61