Mobile communication terminal and method capable of quickly connecting with base station using efficient transmission power control

• US 20070178929A1
• Filed: 08/01/2006
• Published: 08/02/2007
• Est. Priority Date: 01/19/2006
• Status: Abandoned Application

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: Kim, Oui Sung
• Application Number:
  US11/497,575
• Publication Number:
  US 20070178929A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

A mobile communication terminal and a method which is capable of quickly connecting with base station by efficiently controlling a transmission power are provided. The mobile communication terminal reads a recent power value of a transmitter which successfully connected to a base station from a nonvolatile memory, and tries to connect to the base station. When the connection is successful, the mobile communication terminal decreases the power value of a transmitter by a predetermined amount until the connection fails, and may store again the power value of the transmitter which successfully connected to the base station right before the connection to the base station fails, as the recent power value in the nonvolatile memory, according to the decreasing the power value of the transmitter.

Claims

1. A transmission power control method of a mobile communication terminal, the method comprising:

reading a recent power value of a transmitter which successfully connected to a base station, from a nonvolatile memory;

decreasing a power value of the transmitter by a predetermined amount to be less than the recent power value until a connection to the base station fails, when the connection to the base station was successful with the recent power value; and

storing the power value of the transmitter which successfully connected to the base station immediately prior to the power value with which the connection to the base station fails, as the recent power value in the nonvolatile memory, according to the decreasing a power value of the transmitter.

2. The method of claim 1, further comprising:

increasing the power value of the transmitter by the predetermined amount to be greater than the recent power value until the connection to the base station succeeds, when the connection to the base station had failed with the recent power value; and

storing the power value of the transmitter which successfully connected to the base station as the recent power value in the nonvolatile memory, according to the increasing a power value of the transmitter.

3. The method of claim 1, wherein, in the decreasing a power value of the transmitter, the power value is decreased by an amount greater than the predetermined amount after a predetermined period of time passes.

4. The method of claim 1, wherein the mobile communication terminal connects to the base station by using any one among a half-duplex transceiver and a full-duplex transceiver.

5. A method of controlling a transmission power of a wireless transmitter when a mobile communication terminal connects to a base station by using a nonvolatile memory, the method comprising:

reading a recent power value of the wireless transmitter which successfully connected to the base station, from the nonvolatile memory;

increasing a power value of the wireless transmitter by a predetermined amount to be greater than the recent power value until a connection to the base station succeeds, when the connection to the base station had failed with the recent power value; and

storing the power value of the wireless transmitter which successfully connected to the base station as the recent power value in the nonvolatile memory according to the increasing a power value of the wireless transmitter.

6. A mobile communication terminal comprising:

a nonvolatile memory storing a recent power value of a transmitter which successfully connected to a base station; and

a control unit controlling the transmitter to transmit a signal to the base station according to the recent power value stored in the nonvolatile memory for a connection to the base station, and determining a success of the connection when a corresponding response is received from the base station, or determining a failure of the connection when the corresponding response is not received from the base station,

wherein the control unit decreases the power value of the transmitter by a predetermined amount to be less than the recent power value until the connection to the base station fails and stores the power value of the transmitter which successfully connected to the base station immediately prior to the power value with which the connection to the base station fails, as the recent power value in the nonvolatile memory, when the connection to the base station was successful with the recent power value.

7. The mobile communication terminal of claim 6, wherein the control unit increases the power value of the transmitter by the predetermined amount to be greater than the recent power value until the connection to the base station succeeds, and stores the power value of the transmitter which successfully connected to the base station as the recent power value in the nonvolatile memory, when the connection to the base station fails by the recent power value.

8. The mobile communication terminal of claim 6, wherein the control unit controls the power value of the transmitter to be decreased by the predetermined amount to be less than the recent power value for a predetermined period of time until the connection to the base station fails, and controls the power value to be decreased by a greater amount than the predetermined amount after the predetermined period of time passes.

9. The mobile communication terminal of claim 6, wherein any one among a half-duplex transceiver and a full-duplex transceiver is used for the connection to the base station.

10. A mobile communication terminal comprising:

a nonvolatile memory storing a recent power value which successfully connected to a base station;

a wireless transmitter transmitting a signal for a connection to the base station;

a wireless receiver receiving a signal from the base station responding to the signal which the wireless transmitter transmits; and

a control unit controlling the wireless transmitter to transmit the signal for the connection to the base station according to the recent power value stored in the nonvolatile memory for the connection to the base station, and determining a success of the connection when a corresponding response is received from the base station, or determining a failure of the connection when the corresponding response is not received from the base station,

wherein, the control unit increases the power value of the wireless transmitter by a predetermined amount to be greater than the recent power value until the connection to the base station succeeds, and stores the power value of the wireless transmitter which successfully connected to the base station as the recent power value in the nonvolatile memory, when the connection to the base station fails with the recent power value.