MOBILE TERMINAL, WIRELESS NETWORK SYSTEM HAVING THE MOBILE TERMINAL, AND SCANNING METHOD OF THE WIRELESS NETWORK SYSTEM

• US 20120263059A1
• Filed: 04/13/2012
• Published: 10/18/2012
• Est. Priority Date: 04/14/2011
• Status: Abandoned Application

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: KIM, Myung Chul, Lee, Soo Yong
• Application Number:
  US13/447,044
• Publication Number:
  US 20120263059A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data

Abstract

A mobile terminal includes an acceleration sensor, and a wireless network system includes the mobile terminal including a sensor for generating a signal corresponding to a movement of the mobile terminal; a status management module for detecting a moving status of the mobile terminal by using the signal from the sensor, and for sensing a strength of a signal provided from a base station to which the mobile terminal is connected; a scanning module for performing a scanning operation with respect to adjacent base stations according to a result of the detecting and a result of the sensing; and a memory for storing information collected via the scanning operation.

Claims

1. A scanning method performed by a wireless network system comprising a mobile terminal, the scanning method comprising:

detecting a moving status of the mobile terminal by using a value of a signal from a sensor that is mounted in the mobile terminal;

determining whether the moving status of the mobile terminal is maintained during a first time period after the moving status is detected;

sensing a strength of a signal provided from a base station to which the mobile terminal is connected; and

performing a scanning operation according to a result of the determining and a result of the sensing.

2. The scanning method of claim 1, further comprising determining whether a decrease status of the strength of the signal provided from the base station is maintained during the first time period, and

when it is determined that the moving status of the mobile terminal is maintained and simultaneously it is determined that the decrease status of the strength of the signal provided from the base station is maintained during the first time period, performing the scanning operation.

3. The scanning method of claim 1, wherein the determining of the moving status comprises determining whether the mobile terminal becomes distant from the base station, based on the sensing of the strength of the signal provided from the base station, and when the mobile terminal becomes distant from the base station, the scanning operation is performed.

4. The scanning method of claim 1, further comprising:

storing information regarding a result of the scanning operation in a memory in the mobile terminal;

comparing the strength of the signal provided from the base station with a threshold value; and

performing a handoff process with respect to other base station, according to a comparison result.

5. The scanning method of claim 4, wherein the handoff process is performed when the moving status of the mobile terminal is maintained and simultaneously the strength of the signal is less than the threshold value.

6. A mobile terminal comprising:

a sensor for generating a signal corresponding to movement of the mobile terminal;

a status management module for detecting a moving status of the mobile terminal by using the signal from the sensor, and for sensing a strength of a signal provided from a base station to which the mobile terminal is connected;

a scanning module for performing a scanning operation with respect to adjacent base stations according to a result of the detecting and a result of the sensing; and

a memory for storing information collected via the scanning operation.

7. The mobile terminal of claim 6, wherein the status management module comprises:

a signal strength sensing unit for sensing the strength of the signal provided from the base station, and for determining an increase and decrease pattern of the strength of the signal provided from the base station; and

a moving status detecting unit for detecting a moving status of the mobile terminal by using the signal from the sensor, and for determining whether the moving status of the mobile terminal is maintained.

8. The mobile terminal of claim 6, wherein the scanning module performs the scanning operation when the moving status of the mobile terminal is maintained during a first time period and simultaneously, a decrease status of the strength of the signal provided from the base station is maintained, after the moving status is detected.

9. The mobile terminal of claim 6, wherein the status management module compares the strength of the signal provided from the base station with a threshold value, and then generates a comparison result;

and

the scanning module performs a handoff process with respect to other base station, according to the comparison result.

10. The mobile terminal of claim 9, wherein the handoff process is performed when the moving status of the mobile terminal is maintained and simultaneously the strength of the signal is less than the threshold value.

11. The mobile terminal of claim 6, wherein the sensor comprises an acceleration sensor.

12. A wireless network system comprising the mobile terminal of claim 6.