Mobile communication terminal apparatus with reception level measurement control

• US 6,144,858 A
• Filed: 01/04/2000
• Issued: 11/07/2000
• Est. Priority Date: 09/13/1999
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Masuda, Hiroyoshi
• Primary Examiner(s): Nguyen, Lee
• Assistant Examiner(s): Nguyen, Simon
• Application Number:
  US09/477,417
• Time in Patent Office: 308 Days
• Field of Search: 455/550, 455/456, 455/38.3, 455/13.4, 455/515, 455/67.1, 455/575, 455/522, 455/421, 342/450, 342/463, 342/458
• US Class Current: 455/456.3
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Power wastefully consumed in a prior art mobile station in a reception level measurement process and burst transmission is reduced by the invention, by determining the current location of a mobile station by measuring a reception level with respect to an accommodating cell, and suspending a reception level measurement with respect to adjacent cells and burst transmission of a result of measurement when the mobile station is near the center of the accommodating cell.

Claims

1. A mobile communication terminal apparatus comprising:

a radio component for receiving over a broadcast channel an information signal transmitted by a first base station provided in an accommodating cell and for receiving information signals transmitted by secondary base stations provided in respective adjacent cells;

a reception level measuring unit for measuring a reception level of each of the information signals received by said radio component from each of the first and secondary base stations; and

a radio control unit for controlling said radio component by determining a current location of the mobile communication terminal apparatus relative to the accommodating cell based on the measured reception level, and suspending measurement of the reception level with respect to the accommodating cell, and suspending burst transmission for transmitting a result of measurement of the reception level to each of the first and secondary base stations, when it is determined that the mobile communication terminal apparatus is located near a center of the accommodating cell.

2. The mobile communication terminal apparatus according to claim 1, wherein said radio control unit determines the current location of the apparatus by comparing an average reception level calculated on the basis of a plurality of point-by-point average electric field intensity levels measured by said reception level measuring unit, with a predetermined threshold value.

3. A mobile communication terminal apparatus comprising:

a radio component for receiving over a broadcast channel an information signal transmitted by a first base station provided in an accommodating cell and for receiving information signals transmitted by secondary base stations provided in respective adjacent cells;

a reception level measuring unit for measuring, at a certain measurement frequency, a reception level of each of the information signals received by said radio component from each of the first and secondary base stations; and

a radio control unit for controlling said radio component by determining a movement of the mobile communication terminal apparatus in the accommodating cell based on a plurality of reception levels with respect to the accommodating cell measured by said reception level measuring unit, and reducing the frequency of measurement of the reception level with respect to the accommodating cell, when it is determined that the mobile communication apparatus is substantially stationary.

4. The mobile communication terminal apparatus according to claim 3, wherein said radio control unit determines the movement by comparing a reception level fluctuation value derived by calculating a distribution of point-by-point average electric field intensity levels measured by said reception level measuring unit, with a predetermined threshold value.

5. A mobile communication terminal apparatus comprising:

a radio component for receiving over a broadcast channel an information signal transmitted by a first base station provided in an accommodating cell and for receiving information signals transmitted by secondary base stations provided in respective adjacent cells;

a reception level measuring unit for measuring, at a certain measurement frequency, a reception level of each of the information signals received by said radio component from each of the first and secondary base stations; and

a radio control unit for controlling said radio component by determining a current location and movement of the mobile terminal apparatus in the accommodating cell based on the reception level with respect to the accommodating cell measured by said reception level measuring unit, and suspending measurement of the reception level with respect to the accommodating cell, reducing a frequency of measurement of the reception level with respect to the accommodating cell, and suspending burst transmission for transmitting a result of measurement of the reception level to each of the first and secondary base stations, when it is determined that the mobile communication apparatus is substantially stationary near a center of the accommodating cell.

6. The mobile communication terminal apparatus according to claim 5, wherein said radio control unit determines the current location by comparing an average reception level derived from point-by-point average electric field intensity levels measured by said reception level measuring unit, with a first predetermined threshold value, and determines the movement by comparing a reception level fluctuation derived by calculating a distribution of point-by-point average electric field intensity levels, with a second predetermined threshold value.