Mobile station for performing handoff using position information and method thereof

• US 20060240833A1
• Filed: 02/22/2006
• Published: 10/26/2006
• Est. Priority Date: 02/22/2005
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Do-Hun, Oh, Dong-In, Cho, Byung-Duck, Lee, Ki-Tae, Kam, Doo-Yoel
• Application Number:
  US11/359,687
• Publication Number:
  US 20060240833A1
• Time in Patent Office: Days
• US Class Current: 455/440
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 36/322 by location data

Abstract

A mobile station (MS) for performing a handoff using position information including a global positioning system (GPS) module for receiving one or more GPS signals; and a controller for calculating a position of the MS by enabling the GPS module if a handoff condition occurs and transmitting the calculated position information to a base station (BS).

Claims

1. A mobile station (MS) for performing a handoff using position information, the MS comprising:

a global positioning system (GPS) module for receiving one or more GPS signals; and

a controller for calculating a position for the MS by enabling the GPS module if a handoff condition occurs and transmitting the calculated position information to a base station (BS).

2. The MS of claim 1, wherein the controller determines whether the handoff condition occurs by detecting whether strength, i.e., an energy-to-interference ratio (Ec/Io), of a pilot signal received from the BS drops below a predetermined threshold.

3. The MS of claim 1, wherein the controller determines whether the handoff condition occurs by comparing a reference value with one of a Received Signal Strength Indication (RSSI) and a signal-to-noise ratio (SNR).

4. A mobile station (MS) for performing a handoff using position information, the MS comprising:

a global positioning system (GPS) module for receiving one or more GPS signals; and

a controller for determining an enable period of the GPS module, calculating a position for the MS by enabling the GPS module according to the GPS module enable period, and transmitting the calculated position information to a base station (BS).

5. The MS of claim 4, wherein the controller determines to periodically enable the GPS module when the MS is located at an area including a plurality of places in which the MS has difficulty locating GPS satellites providing the GPS signals.

6. A method of performing handoff using position information in a mobile station (MS) including a global positioning system (GPS) module for receiving one or more GPS signals, the method comprising:

determining whether a handoff condition occurs;

calculating a position for the MS by enabling the GPS module if the handoff condition occurs; and

transmitting the calculated position information to a base station (BS).

7. The method of claim 6, wherein determining whether the handoff condition occurs is performed by detecting whether a signal strength (measured by an energy-to-interference ratio (Ec/Io) of a pilot signal received from the BS) drops below a predetermined threshold.

8. The method of claim 6, wherein determining, whether the handoff condition occurs is determined by comparing a reference value with one of a Received Signal Strength Indication (RSSI) and a signal-to-noise ratio (SNR).

9. A method of performing a handoff using position information in a mobile station (MS) including a global positioning system (GPS) module for receiving one or more GPS signals, the method comprising:

determining an enable period of the GPS module;

calculating a position for the MS by enabling the GPS module when the GPS module enable period arrives; and

transmitting the calculated position information to a base station (BS).

10. The method of claim 9, further comprising:

determining to periodically enable the GPS module when the MS is located at an area including a plurality of places in which the MS has difficulty locating GPS satellites providing the GPS signals.