Mobile communication terminal

• US 6,594,494 B1
• Filed: 12/17/1999
• Issued: 07/15/2003
• Est. Priority Date: 06/30/1998
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kakehi, Yuji
• Primary Examiner(s): Legree, Tracy
• Application Number:
  US09/446,142
• Time in Patent Office: 1,306 Days
• Field of Search: 455/436, 455/437, 455/440-443, 455/67.1, 455/67.3, 455/67.6, 455/423, 455/425, 455/71, 455/438, 455/439, 714/704, 714/746, 370/331, 370/332, 370/333
• US Class Current: 455/437
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data

Abstract

A reference pattern comparing means 14 detects the number of error bits, using a reference pattern data portion embedded in the received signal. An error correcting means 15 detects the number of the corrected bits in the user data portion in the signal. The bit error rate measuring means 16 measures the bit error rate, on the basis of the number of the error bits and the corrected bits. The electric field level measuring means 17 measures the level of the electric field of the received signal. The electric field correcting means 18 corrects the level of the electric field, on the basis of the bit error rate. The control of the handing over of the radio communication channel is carried out, on the basis of the corrected electric field.

Claims

1. A mobile terminal for a mobile communication system, said mobile terminal comprising:

an electric field level measuring means for measuring the level of the electric field of the signal received from the base radio station;

a bit error rate measuring means for measuring the bit error rate of the signal received from the base radio station;

an electric field correcting means for correcting the level of the electric field measured by the electric field level measuring means, on the basis of the bit error rate measured by the bit error rate measuring means; and

a controller for controlling the handing over between radio communication channels, on the basis of the electric field corrected by the electric field correcting means.

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

a reference pattern comparing means for comparing a reference pattern data portion, which is embedded in the data received from the base radio station, with a reference pattern stored in the mobile terminal, so as to detect the number of the error bits contained in the reference pattern data portion; and

an error correcting means for correcting a user data portion in the received data and for detecting the number of the corrected bits,

wherein the bit error rate measuring means measures the bit error rate of the receive signal, on the basis of the number of the error bits in the reference pattern data portion, which is measured by the reference pattern comparing means, and the number of the corrected bits in the user data portion, which is detected by the error correcting means.