Method for automatically creating home zone list in a mobile telecommunication system

• US 6,748,213 B1
• Filed: 10/30/2000
• Issued: 06/08/2004
• Est. Priority Date: 09/25/2000
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Young-Hae
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): D AGOSTA, STEPHEN M
• Application Number:
  US09/699,768
• Time in Patent Office: 1,317 Days
• Field of Search: 455/432, 455/433, 455/436, 455/440, 455/456, 455/406, 455/432--43, 455/456--45, 455/434, 455/435.1, 370/310, 370/331, 370/328
• US Class Current: 455/433
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/065 involving selection of the user mobility server
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Abstract

A method for generating a new home zone list upon detecting the address information of a mobile user comprising the steps of receiving the address information of the mobile station; detecting target Base Transceiver Stations (BTSs) located within a predetermined distance around the mobile station. The coverage area, in which the address location is within, is divided into a plurality of sub-coverage areas. The detected BTSs are associated with each of the divided groups. The BTSs are prioritized within each of the divided groups into the first, second and third tier BTS. The new sector list is then generated for the mobile station based on the sector angle data of the first tier BTS.

Claims

1. A method for generating a new sector list to define a home zone for a subscriber within a wireless communication network, said method comprising the steps of:

(a) receiving an address location information defining a personal home area from said subscriber;

(b) detecting a plurality of target Base Transceiver Stations (BTSs) located within a predefined distance around said address location, each of said plurality BTSs having different sector angles;

(c) dividing a coverage area around said address location into a plurality of sub-coverage areas;

(d) associating said detected BTSs to each of said divided sub-coverage areas;

(e) classifying said associated BTSs within each of said plurality areas into different tier BTSs; and

(i) determining a home ankle (HAB) between said address location and said BTS;

(ii) calculating, an angle (ASH) between each sector angle of said BTS and said address location by subtracting said respective sector angle of said BTS from said home angle (HAB); and

(iii) classifying one of said plurality BTSs located within a first predetermined distance around said address location as said first tier BTS if said calculated angle (ASH) between said BTS sector angle and said address location has a lowest angle value; and

,

(f) generating said new sector list defining said home zone according to the sector angles of said first tier BTS.

2. The method of claim 1, further comprising the step of registering said determined new sector list to a home location register (HLR) associated with a mobile station of said subscriber.

3. The method of claim 2, further comprising the step of, upon initiating or receiving a call by a mobile station of said subscriber, comparing the location of said mobile station and the information stored in said HLR to generate different billing rate for said subscriber.

4. The method of claim 1, further comprising the step of storing geographic coordinates of said address location for said subscriber.

5. The method of claim 1, further comprising the step of converting said address location to the corresponding latitude and longitude coordinates.

6. The method of claim 1, wherein a distance between said address location and each of said target BTS is determined in accordance with the following equation to determine said target BTSs which fall within said predefined distance in said step (b):

$D={\left[{\left(\left(x_{\mathrm{bts}}-x_{\mathrm{home}}\right)\times <br><br>d_{\mathrm{long}}\right)}^2={\left(\left(y_{\mathrm{bts}}-y_{\mathrm{home}}\right)\times <br><br>d_{\mathrm{lat}}\right)}^2\right]}^{1/2},$

wherein x_bts and y_bts represent longitude and latitude distance of said BTS, x_home, and y_home represent longitude and latitude distance of said address location, and d_lat, and d_long represent 1 attitude and longitude coordinates of a particular geographical area.

7. The method of claim 1, wherein said plurality sub-coverage areas are evenly distributed around said address location.

8. The method of claim 1, wherein sub-step (iii) further comprises:

(a) classifying one of said plurality BTSs located within a second predetermined distance from said first predetermined distance as said second tier BTS if said calculated angle (ASH) between said BTS sector angle and said address location has a lowest angle value, and

(b) classifying one of said plurality BTSs located within a third predetermined distance from said second predetermined distance as said third tier BTS if said calculated angle (ASH) between said BTS sector angle and said address location has a lowest angle value.

9. The method of claim 1, wherein, if said BTS within one of said plurality sub-coverage areas is missing in said step (d), assigning one of said second and third tier BTSs from adjacent groups having a lowest sector angle value and which falls within a reference angle range as said first tier BTS for said missing sub-coverage area.

10. The method of claim 1, wherein said step (f) includes calculating corresponding RTD (Round Trip Delay) range defining the boundary of said home zone according to the sector angles of said first tier BTS.

11. The method of claim 10, wherein the calculation of said calculated RTD range is performed in accordance with the following equation:

12. The method of claim 1, wherein said step (f) comprises includes:

(i) eliminating a sector angle exceeding a threshold angle value from said first tier BTS, and

(ii) eliminating a sector angle if a reference beam pattern of the antenna corresponding to the sector angle of said first tier BTS falls below a threshold value.

13. The method of claim 1, wherein said step (f) includes generating said new sector list using all the sector angles of said first tier BTS if an omni-directional antenna is used in said first tier BTS.