Operation data creating method and apparatus for mobile communication system and storage medium

• US 7,245,914 B2
• Filed: 07/03/2001
• Issued: 07/17/2007
• Est. Priority Date: 07/05/2000
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Ishikawa, Yoshihiro
• Primary Examiner(s): Anderson; Matthew
• Assistant Examiner(s): PEREZ, ANGELICA
• Application Number:
  US09/897,102
• Publication Number:
  US 20020022482A1
• Time in Patent Office: 2,205 Days
• Field of Search: 455/432.1, 455/435.3, 455/450, 455/452.2, 455/436, 455/438, 455/439, 455/440, 455/442, 455/446, 455/423, 455/424, 455/425, 455/67.11, 455/67.14, 455/67.16, 455/67.17, 455/4
• US Class Current: 455/436
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

An operation data creating method and apparatus for creating operation data indicating with respect to each base station other base stations related to each base station, based on a communication quality level with respect to each base station at each local position within a service area in a mobile communication system which includes a plurality of base stations set up within the service area and a mobile station which makes a wireless communication with the base stations, by creating quality information indicating the communication quality level with respect to each base station at each local position within the service area, selecting base stations having a second or subsequent communication quality level at each local position where the same base station of interest has a highest communication quality level, based on the created quality information with respect to each base station at each local position, and creating the operation data indicating the selected base stations as the other base stations related to the base station of interest having the highest communication quality level.

Claims

1. An operation data creating method for creating operation data in a mobile communication system which includes a plurality of base stations within a service area and a mobile station which makes a wireless communication with the base stations, said operation data creating method comprising the steps of:

creating quality information indicating the communication quality level with respect to each base station at each of plural identified regions within a cell of the service area;

selecting a subset of first identified regions from the plural identified regions, a first base station having a highest communication quality level at each identified region in the subset of first identified regions based on the created quality information, said subset of first identified regions including a local position of the mobile station;

creating a list having base stations arranged at positions in an order form a highest communication quality level based on the created quality information, with respect to each identified region;

selecting from each list base stations having a second highest or subsequent communication quality level which is lower than the first base station at each identified region in the subset of first identified regions where the first base station has the highest communication quality level in the corresponding list based on the created quality information; and

creating the operation data indicating the selected base stations as other base stations related to the first base station having the highest communication quality level.

2. The operation data creating method for the mobile communication system as claimed in claim 1, further comprising:

computing, by estimation according to a predetermined algorithm, the communication quality level with respect to each base station at each identified region within the service area; and

creating the quality information based on a result of the computing.

3. The operation data creating method for the mobile communication system as claimed in claim 1, further comprising:

measuring the communication quality level with respect to each base station at each identified region within the service area; and

creating the quality information based on a result of the measuring.

4. The operation data creating method for the mobile communication system as claimed in claim 1, further comprising:

selecting one of the base stations having the second or subsequent communication quality level if a same base station has the second or subsequent communication quality level at each identified region in the subset of first identified regions, when selecting the base stations having the second or subsequent communication quality level at each identified region where the first base station has the highest communication quality level.

5. The operation data creating method for the mobile communication system as claimed in claim 1, wherein:

the base stations are successively selected from the positions having the higher order in each list, when selecting the base stations located at the second or subsequent position in each list having the first base station positioned at the first position having the highest order in each list, and

the operation data created indicate the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the selected base stations are arranged in the selected order.

6. The operation data creating method for the mobile communication system as claimed in claim 5, wherein:

score information corresponding to a number of a same base station located at a same position in each list is generated, when successively selecting the base stations located at the second or subsequent positions in each list having the first base station located at the first position having the highest order in each list, from the base stations located at positions having the higher order in each list, and

the operation data created indicates the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the score information is made to correspond to the same base station located at the same position in each list.

7. The method of claim 1, further comprising:

identifying the plural identified regions within the cell of the service area.

8. An operation data creating apparatus for creating operation data in a mobile communication system which includes a plurality of base stations within a service area and a mobile station which makes a wireless communication with the base stations, said apparatus comprising:

quality information creating means for creating quality information indicating the communication quality level with respect to each base station at each of plural identified regions within a cell of the service area;

first base station selecting means for selecting a subset of first identified regions from the plural identified regions, first base station having a highest communication quality level at each identified region in the subset of first identified regions based on the created quality information, said subset of first identified regions including a local position of the mobile station;

creating a list having base stations arranged at positions in an order form a highest communication quality level based on the created quality information, with respect to each identified region;

base station selecting from each list means for selecting base stations having a second highest or subsequent communication quality level which is lower than the first base station at each identified region in the subset of first identified regions where the first base station has the highest communication quality level in the corresponding list based on the created quality information; and

creating means for creating the operation data indicating the selected base stations as other base stations related to the first base station having the highest communication quality level.

9. The operation data creating apparatus for the mobile communication system as claimed in claim 8, further comprising:

said quality information creating means includes computing means for computing by estimation the communication quality level with respect to each base station at each identified region within the service area according to a predetermined algorithm, and creates the quality information based on a computed result of the computing means.

10. The operation data creating apparatus for the mobile communication system as claimed in claim 8, wherein:

said quality information creating means measures the communication quality level with respect to each base station at each identified region within the service area, and creates the quality information based on a measured result.

11. The operation data creating apparatus for the mobile communication system as claimed in claim 8, wherein:

said base station selecting means selects one of the base stations having the second or subsequent communication quality level if a same base station has the second or subsequent communication quality level at each identified region in the subset of first identified regions, when selecting the base stations having the second or subsequent communication quality level at each identified region where the first base station has the highest communication quality level.

12. The operation data creating apparatus for the mobile communication system as claimed in claim 8, wherein:

said base station selecting means successively selects the base stations from the positions having the higher order in each list, when selecting the base stations located at the second or subsequent position in each list having the first base station positioned at the first position having the highest order in each list, and

the operation data indicating the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the selected base stations are arranged in the selected order, are created.

13. The operation data creating apparatus for the mobile communication system as claimed in claim 12, wherein:

said base station selecting means includes score information generating means for generating score information corresponding to a number of a same base station located at a same position in each list, when successively selecting the base stations located at the second or subsequent positions in each list having the first base station located at the first position having the highest order in each list, from the base stations located at positions having the higher order in each list, and

the operation data indicating the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the score information is made to correspond to the same base station located at the same position in each list, are created.

14. The apparatus of claim 8, further comprising:

means for identifying the plural identified regions within the cell of the service area.

15. A computer-readable storage medium which stores a program for causing a computer to carry out a process of creating operation data in a mobile communication system which includes a plurality of base stations within a service area and a mobile station which makes a wireless communication with the base stations, said program comprising:

a quality information creating procedure which causes the computer to create quality information indicating the communication quality level with respect to each base station at each of plural identified regions within a cell of the service area;

a first base station selecting procedure which causes the computer to select a subset of first identified regions from the plural identified regions, a first base station having a highest communication quality level at each identified region in the subset of first identified regions based on the created quality information, said subset of first identified regions including a local position of the mobile station;

creating a list having base stations arranged at positions in an order form a highest communication quality level based on the created quality information, with respect to each identified region;

a base station selecting procedure which causes the from each list base stations having a second highest or subsequent communication quality level which is lower than the first base station at each identified region in the subset of first identified regions where the first base station has the highest communication quality level in the corresponding list based on the created quality information; and

a creating procedure which causes the computer to create the operation data indicating the selected base stations as other base stations related to the first base station having the highest communication quality level.

16. The computer-readable storage medium as claimed in claim 15, wherein:

said quality information creating procedure includes a computing procedure which causes the computer to compute by estimation the communication quality level with respect to each base station at each identified region within the service area according to a predetermined algorithm, and the quality information is created based on a computed result of the computing procedure.

17. The computer-readable storage medium as claimed in claim 15, wherein:

said quality information creating procedure causes the computer to measure the communication quality level with respect to each base station at each identified region within the service area, and the quality information is created based on a measured result.

18. The computer-readable storage medium as claimed in claim 15, wherein:

said base station selecting procedure causes the computer to select one of the base stations having the second or subsequent communication quality level in each list if a same base station has the second or subsequent communication quality level at a plurality of identified regions, when selecting the base stations having the second or subsequent communication quality level at each identified region in the subset of first identified regions where the first base station has the highest communication quality level in each list.

19. The computer-readable storage medium as claimed in claim 15, wherein:

said base station selecting procedure causes the computer to successively select the base stations from the positions having the higher order in each list, when selecting the base stations located at the second or subsequent position in each list having the first base station positioned at the first position having the highest order in each list, and

the operation data indicating the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the selected base stations are arranged in the selected order, are created.

20. The computer-readable storage medium as claimed in claim 19, wherein:

said base station selecting procedure includes a score information generating procedure which causes the computer to generate score information corresponding to a number of a same base station located at a same position in each list, when successively selecting the base stations located at the second or subsequent positions in each list having the first base station located at the first position having the highest order in each list, from the base stations located at positions having the higher order in each list, and

the operation data indicating the selected base stations as the other base stations related to the first base station at the first position having the highest order in each list, in a state where the score information is made to correspond to the same base station located at the same position in each list, are created.

21. The computer-readable storage medium of claim 15, said program further comprising:

a region identifying procedure configured to identify the plural identified regions within the cell of the service area.

22. An operation data creating apparatus for creating operation data in a mobile communication system which includes a plurality of base stations within a service area and a mobile station which makes a wireless communication with the base stations, said apparatus comprising:

a quality information creating part configured to create quality information indicating the communication quality level with respect to each base station at each of plural identified region within a cell of the service area;

a first base station selecting part configured to select a subset of first identified regions from the plural identified regions, a first base station having a highest communication quality level at each identified region in the subset of first identified regions based on the created quality information, said subset of first identified regions including at least one identified region within the service area;

creating a list having base stations arranged at positions in an order form a highest communication quality level based on the created quality information, with respect to each identified region;

a base station selecting part from each list, base stations having a second highest or subsequent communication quality level which is lower than the first base station at each identified region in the subset of first identified regions where the first base station has the highest communication quality level in the corresponding list based on the created quality information; and

a creating part configured to create the operation data indicating the selected base stations as the other base stations related to the first base station having the highest communication quality level.

23. The apparatus of claim 22, further comprising:

a region identifying part configured to identify the plural identified regions within the cell of the service area.