METHOD FOR REDUCING GPS RECEIVER POSITIONING TIME

• US 20150097725A1
• Filed: 10/03/2014
• Published: 04/09/2015
• Est. Priority Date: 10/03/2013
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: NISHIOKA, YOSHI, ONODERA, TAKAFUMI, TAMURA, MASAHIDE
• Granted Patent: US 9,702,980 B2
• Time in Patent Office: Days
• US Class Current: 342/357.51
• CPC Class Codes: G01S 19/21 Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
• CPC Class Codes: G01S 19/24 Acquisition or tracking or demodulation of signals transmitted by the system synchronisation aspects of direct sequence spread spectrum modulation H04B1/7073
• CPC Class Codes: G01S 19/258 relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view
• CPC Class Codes: G01S 19/27 creating, predicting or correcting ephemeris or almanac data within the receiver
• CPC Class Codes: G01S 19/34 Power consumption

Abstract

A method for reducing the positioning time of a GPS receiver is disclosed. In response to a request from a user function for positioning data a GPS management section instructs a device control section to lower the functions of a group of components. The lowering of the functions of the components reduces the noise level. The GPS management section operates the GPS receiver. The GPS receiver executes an acquisition process in an environment with a low noise level. After completion of the acquisition process, the functions of the component are restored.

Claims

1. A method for reducing positioning time of a GPS receiver within an electronic device, said method comprising:

categorizing electronic components within said electronic device into a first group and a second group;

in response to a request for positioning information, determining whether or not an operation of said GPS receiver begins from a hot start in which ephemeris data and almanac data are retained;

in a determination that said operation of said GPS receiver does not begin from a hot start, lowering functions of said first group of electronic components and initiating a GPS positioning process via said GPS receiver;

in response to said GPS positioning process not being completed within a predetermined time, lowering functions of said second group of electronic components and continuing said GPS positioning process via said GPS receiver; and

producing corresponding positioning information by said GPS receiver.

2. The method of claim 1, further comprising restoring said functions of said electronic components after said corresponding positioning information have been produced by said GPS receiver.

3. The method of claim 1, wherein said lowering functions include reducing voltage of said electronic components.

4. The method of claim 1, wherein said lowering functions include reducing operating frequencies of said electronic components.

5. The method of claim 1, further comprising in a determination that said operation of said GPS receiver begins from a hot start, initiating GPS positioning via said GPS receiver immediately.

6. The method of claim 5, further comprising in response to said GPS positioning process not being completed within a first predetermined time, lowering functions of said first group of electronic components and continuing said GPS positioning process via said GPS receiver.

7. The method of claim 6, further comprising in response to said GPS positioning process not being completed within a second predetermined time, lowering functions of said second group of electronic components and continuing said GPS positioning process via said GPS receiver.

8. The method of claim 1, further comprising

determining whether or not said electronic device is located indoors;

in a determination that said electronic device is located indoors, stopping said request and said GPS positioning process.

9. The method of claim 1, further comprising

categorizing electronic components within said electronic device into said first group, said second group and a third group;

and

in response to said GPS positioning process not being completed within an additional predetermined time, lowering functions of third group of electronic components and continuing said GPS positioning process via said GPS receiver.