Method for calculating an optimal number of BTSs in a wireless network and determining a loading factor value therefor

• US 6,553,233 B1
• Filed: 06/21/1999
• Issued: 04/22/2003
• Est. Priority Date: 06/19/1998
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Sang-jun, You, Byung-chul
• Primary Examiner(s): Kincaid, Lester G.
• Application Number:
  US09/337,134
• Time in Patent Office: 1,401 Days
• Field of Search: 455/446, 455/452, 455/453, 455/423, 455/62, 455/63, 455/67.1, 370/332, 370/342
• US Class Current: 455/446
• CPC Class Codes: H04W 16/18 Network planning tools

Abstract

A method is disclosed for calculating the optimal number of base transceiver stations (BTSs) in a wireless network and for determining a loading factor value therefor. The wireless network has a plurality of BTSs, each station providing communication service to mobile stations. As a loading factor value increases, the traffic decreases and the coverage area increases. The method calculates the number of BTSs in accordance with a decrease in traffic and the number of BTSs in accordance with an increase in the coverage area; determines a loading factor value which minimizes a difference between the two number of BTSs; and determines the optimal number of BTSs according to the determined loading factor value.

Claims

1. A method for calculating an optimal number of base transceiver stations (BTSs) in a wireless network having a plurality of BTSs providing communication service to mobile stations in a coverage area, said method comprising the steps of:

calculating a first number of BTSs in accordance with a decrease in traffic as a loading factor value increases, wherein the loading factor value is an accommodation limit of each of the BTSs;

calculating a second number of BTSs in accordance with an increase in the coverage area as the loading factor value increases;

determining a loading factor value using the first and second numbers; and

determining the optimal number of BTSs based on the determined loading factor value.

2. The method as set forth in claim 1, wherein in said determining a loading factor value step, said loading factor value is chosen at a position where the first number coincides with the second number.

3. The method as set forth in claim 1, wherein in said determining a loading factor value step, said loading factor value is determined to be a loading factor value which minimizes a difference between the first and the second number.

4. The method as set forth in claim 1, wherein said loading factor value is determined according to geographical features of a region being serviced by the wireless network.

5. The method as set forth in claim 1, wherein in said determining the optimal number of BTSs step, the optimal number of BTSs is determined to be a number of BTSs corresponding to the determined loading factor value.

6. The method as set forth in claim 1, wherein said determined loading factor value is 60%, and the optimal number of BTSs is a number of BTSs corresponding to the determined loading factor value of 60%.

7. A method for determining an optimal loading factor value in a wireless network having a plurality of BTSs to serve a plurality of mobile stations within a particular coverage area, the method includes the steps of:

calculating a number of BTSs in accordance with a decrease in traffic as a loading factor value increases, wherein the loading factor value is an accommodation limit of each of the BTSs;

calculating a number of BTSs in accordance with an increase in the coverage area size as a loading factor value increases; and

determining the optimal loading factor value as the loading factor value which minimizes a difference between the number of BTSs in accordance with a decrease in traffic and the number of BTSs in accordance with an increase in the coverage area size.

8. The method as set forth in claim 7, wherein in said determining step, the optimal loading factor value is determined to be the loading factor value where the number of BTSs in accordance with a decrease in traffic coincides with the number of BTSs in accordance with an increase in the coverage area size.

9. The method as set forth in claim 7, wherein in said determining step, the optimal loading factor value is determined to be a loading factor value which minimizes a difference between the number of BTSs in accordance with a decrease in traffic and the number of BTSs in accordance with an increase in the coverage area size.

10. The method as set forth in claim 7, wherein said determined loading factor value is 60%.

11. The method as set forth in claim 7, wherein in said determining step, the optimal loading factor value is determined according to geographical features of a region being serviced by the wireless network.

12. The method as set forth in claim 7, wherein the determined optimal loading factor value is used to calculate an optimal number of BTSs in the wireless network.