Method for transmitting digital channel with priority of mobile communication terminal

• US 7,218,942 B2
• Filed: 08/15/2003
• Issued: 05/15/2007
• Est. Priority Date: 08/16/2002
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Koo, Bon-young, Kim, Young-Shim
• Primary Examiner(s): Eng, George
• Assistant Examiner(s): Kim, Wesley
• Application Number:
  US10/641,152
• Publication Number:
  US 20040033802A1
• Time in Patent Office: 1,369 Days
• Field of Search: 455/432.1, 455/434, 455/515, 455/464, 455/516, 455/509, 455/450, 455/452.1, 455/455, 455/447, 455/435.2, 379/93.31, 379/93.32
• US Class Current: 455/464
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A method for transmitting a call signal through a digital channel while in an analog area is provided which allows for enhanced speech and transmission quality while in the analog area. When a call is originated in an analog area, a mobile communication terminal scans a most recently used (MRU) table to locate a digital channel which matches a digital channel available in the analog area. If there is a match, the call is placed through the available digital channel. If none of the digital channels in the MRU table matches the available digital channel, then the call is placed through an analog channel.

Claims

1. A method of transmitting a signal through a digital channel in a mobile communication terminal, comprising:

originating a call by a mobile communication terminal in an analog area;

scanning a most recently used (MRU) table of the mobile communication terminal for an obtained digital channel in response to the call origination in the analog area; and

transmitting a calling signal through the obtained digital channel if the obtained digital channel corresponds to a digital channel included in the MRU table, and transmitting a calling signal through an analog channel if there is no digital channel in the MRU table which corresponds to the obtained digital channel.

5. The method of claim 1, wherein originating a call comprises originating a call in an analog area.

6. The method of claim 5, wherein the analog area is an advance mobile phone service (AMPS) area.

7. The method of claim 1, wherein the MRU table includes information related to most recently used channels.

8. The method of claim 1, wherein the calling signal is transmitted through a digital channel if both a digital channel and an analog channel are available.

2. A method of transmitting a signal through a digital channel in a mobile communication terminal, comprising:

determining if a mobile communication terminal is operating in an analog system;

receiving a call origination command;

originating a call in a digital mode if the mobile communication terminal is not operating in an analog system;

scanning a most recently used (MRU) table of the mobile communication terminal if the mobile communication terminal is operating in an analog system;

comparing at least one digital channel stored in the MRU table and a currently obtained digital channel;

originating a call in a digital mode if the comparing indicates that the currently obtained digital channel is listed in the MRU table; and

originating the call in an analog mode if the comparing indicates that the currently obtained digital channel is not listed in the MRU table.

3. The method of claim 2, wherein the analog system is an Advanced Mobile Phone Service (AMPS) system.

4. The method of claim 2, wherein originating a call in a digital mode comprises transmitting the call through a digital channel in an analog area.

9. The method of claim 2, wherein determining if a mobile communication terminal is operating in an analog system comprises repeatedly re-determining if the mobile communication terminal is operating in an analog system until a call origination command is received.

10. The method of claim 2, wherein the MRU table includes only information related to most recently used channels.

11. The method of claim 2, wherein the call is originated in a digital mode if both a digital channel and an analog channel are available.