METHOD FOR DETERMINING POSITION BASED ON PORTABLE INTERNET USING RECEIVING SIGNAL STRENGTH INDICATOR AND SYSTEM THEREOF

• US 20080026773A1
• Filed: 07/26/2007
• Published: 01/31/2008
• Est. Priority Date: 07/27/2006
• Status: Active Grant

• Current Assignee: Konkuk University Industrial Cooperation Corp, Samsung Electronics Co. Ltd.
• Original Assignee: Konkuk University Industrial Cooperation Corp, Samsung Electronics Co. Ltd.
• Inventors: Kim, Sun-Yong, Ji, Gyu-In, Lee, Chul-Ho, Hyun, Moon-Pil, Kim, Jin-Won, Jung, Hee
• Granted Patent: US 8,831,626 B2
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Provided are a system and method for determining a position based on portable Internet in a portable Internet system. The method includes receiving, by the terminal, information on neighbor base stations (BSs) from a main BS, scanning the neighbor BSs while measuring Received Signal Strength Indicators (RSSIs) for the main BS and the neighbor BSs, determining whether the RSSI for the main BS is greater than a preset threshold value, and deciding, as a position of the terminal, a position associated with an IDentification (ID) of the main BS when the RSSI is greater than the threshold value.

Claims

1. A method for determining a position based on portable Internet in a portable Internet system, the method comprising the steps of:

receiving by a terminal, from a main base station, information on neighbor base stations, upon a position determination request;

scanning the neighbor base stations while measuring Received Signal Strength Indicators (RSSIs) for the main base station and the neighbor base stations;

determining whether the RSSI for the main base station is greater than a threshold value; and

deciding, as a position of the terminal, a position associated with an IDentification (ID) of the main base station when the RSSI is greater than the threshold value.

2. The method of claim 1, further comprising:

scanning the neighbor base stations and measuring relative delay information between the main base station and the neighbor base stations when the RSSI is less than the threshold value; and

determining the position of the terminal using the relative delay information and position information associated with the ID of the main base station and IDs of the neighbor base stations.

3. The method of claim 1, further comprising:

transmitting, by the terminal, a result obtained by scanning the neighbor base stations to a Position Determination Entity (PDE), when the RSSI is less than the threshold value;

extracting, by the PDE, the relative delay information between the main base station and the neighbor base stations, and the IDs of the main base station and the neighbor base stations, which are included in the scan result; and

determining the position of the terminal using the relative delay information and the position information associated with the IDs of the base stations.

4. A system for determining a position based on portable Internet, the system comprising:

a main base station for providing information on neighbor base stations; and

a terminal for, upon a position determination request, receiving the neighbor base station information from the main base station, scanning the neighbor base stations while measuring Received Signal Strength Indicators (RSSIs) for the main base station and the neighbor base stations, determining whether the RSSI for the main base station is greater than a threshold value, and deciding, as the position of the terminal, a position associated with an IDentification (ID) of the main base station when it is determined that the RSSI is greater than the threshold value.

5. The system of claim 4, wherein when the RSSI is less than the threshold value, the terminal obtains distance differences between its position and positions of the neighbor base stations using the relative delay information between the main base station and the neighbor base stations, and determines its position using the obtained distance differences and position information of the main base station and the neighbor base stations.

6. The system of claim 4, wherein when the RSSI is less than the threshold value, the terminal scans the neighbor base stations, and transmits a report message including the scan result.

7. The system of claim 6, further comprising a Position Determination Entity (PDE) for receiving the report message from the terminal, and determining a position of the terminal using relative delay information between the main base station and the neighbor base stations and position information of the main base station and the neighbor base stations.

8. The system of claim 7, wherein when the RSSI is greater than the threshold value, the terminal transmits to the PDE the report message including the position associated with the ID of the main base station, and

the PDE decides, as the position of the terminal, the position associated with the ID of the main base station included in the received report message.