MOBILE TERMINAL APPARATUS AND METHOD FOR PROCESSING A HANDOVER OF A MOBILE TERMINAL

• US 20110081931A1
• Filed: 09/30/2010
• Published: 04/07/2011
• Est. Priority Date: 10/01/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KUWADA, Tsuguhisa, Imagawa, Hidenori, Saitou, Takasi
• Granted Patent: US 8,359,058 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04W 36/302 due to low signal strength
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A mobile terminal apparatus includes a wireless communicator for communicating with a first wireless base station and a second wireless base station; and a controller. The controller measures a first signal quality and a second signal quality, the first signal quality being signal quality of a signal from the first wireless base station which is communicated with the communicator, the second signal quality being a signal quality of a signal received by the communicator from the second wireless base station, and executes a handover from the first wireless base station to the second wireless base station by controlling the communicator when the first signal quality is lower than the second signal quality and an integration value, along the time axis, of a difference between the first and the second signal qualities is more than a predetermined value.

Claims

1. A mobile terminal apparatus comprising:

a wireless communicator for communicating with a first wireless base station and a second wireless base station; and

a controller for

measuring a first signal quality and a second signal quality, the first signal quality being signal quality of a signal from the first wireless base station which is communicated with the communicator, the second signal quality being a signal quality of a signal received by the communicator from the second wireless base station, and

executing a handover from the first wireless base station to the second wireless base station by controlling the communicator when the first signal quality is lower than the second signal quality and an integration value, along the time axis, of a difference between the first and the second signal qualities is more than a predetermined value.

2. The mobile terminal apparatus according to claim 1 further comprising:

a detector for detecting a moving speed of the mobile terminal apparatus; and

wherein the controller corrects the predetermined value on the basis of the detected moving speed.

3. Method for processing a handover of a mobile terminal by the controller mounted on the mobile terminal, the wireless communicator for communicating with a first wireless base station and a second wireless base station, the method comprising:

measuring a first signal quality and a second signal quality, the first signal quality being signal quality of a signal from the first wireless base station which is communicated with the mobile terminal, the second signal quality being a signal quality of a signal received by the mobile terminal from the second wireless base station, and

executing a handover from the first wireless base station to the second wireless base station when the first signal quality is lower than the second signal quality and an integration value, along the time axis, of a difference between the first and the second signal qualities is more than a predetermined value.

4. Method for processing a handover of the mobile terminal according to claim 3 further comprising:

detecting a moving speed of the mobile terminal apparatus; and

correcting the predetermined value on the basis of the detected moving speed.