Modem sharing device of PDA phone and method thereof

• US 20050207546A1
• Filed: 02/09/2005
• Published: 09/22/2005
• Est. Priority Date: 03/17/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Dong-Sub, Yim, Joy
• Granted Patent: US 7,457,635 B2
• Time in Patent Office: Days
• US Class Current: 379/93.80
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision

Abstract

Disclosed are a modem sharing device of a PDA phone capable of efficiently sharing a modem by constructing one parsing module respectively attached to a plurality of applications of the PDA phone in order to parse commands of the plurality of applications, and a method thereof. The modem sharing device of a PDA phone comprises: a plurality of applications; one parsing module for parsing commands generated by the plurality of applications and distributing; a transmission module for transmitting the distributed commands through one port; and a modem for receiving the transmitted commands.

Claims

1. A modem sharing device of a personal digital assistant (PDA) phone comprising:

a plurality of applications;

one parsing module for parsing commands generated by the plurality of applications and distributing;

a transmission module for transmitting the distributed commands through one port; and

a modem for receiving the transmitted commands.

2. The device of claim 1, wherein the parsing module parses the commands by a high-level data link control (HDLC) protocol.

3. The device of claim 1, wherein the parsing module sequentially stores the parsed commands in a TX buffer of a shared memory thereby to distribute the parsed commands.

4. The device of claim 2, wherein the parsing module sequentially stores response packets transmitted from the modem in an RX of the shared memory.

5. The device of claim 1, wherein the applications include a dialer, a camcorder, and a service menu.

6. The device of claim 1, wherein the parsing module judges a kind of a report packet transmitted from the modem and transmits the report packet to a corresponding application.

7. A modem sharing method of a PDA phone comprising:

a registration step that a plurality of applications register to a modem for use through one parsing module;

a request step that the plurality of applications transmit each request packet to the modem through one parsing module and request each response packet according to the transmitted request packet; and

a response step that the plurality of applications receive each response packet according to the request packet through one parsing module.

8. The method of claim 7, wherein the registration step includes:

generating commands by the plurality of applications;

parsing the generated commands by the one parsing module, and distributing the parsed commands;

transmitting the distributed commands to the modem through one port; and

receiving the transmitted commands by the modem and reversely-parsing the commands.

9. The method of claim 7, wherein the request step includes:

sequentially storing each request packet in a shared memory by the plurality of applications; and

parsing the stored request packets and then transmitting the parsed request packets to the modem by the one parsing module.

10. The method of claim 7, wherein the response step includes:

sequentially storing the response packets transmitted from the modem in a shared memory by the one parsing module; and

reading the sequentially stored response packets by the plurality of applications.

11. The method of claim 9, wherein in the request step, the request packets are stored in a TX buffer of the shared memory by the one parsing module.

12. The method of claim 10, wherein in the response step, the request packets are stored in an RX buffer of the shared memory by the one parsing module.

13. The method of claim 7, wherein the one parsing module parses the request packets by using an HDLC protocol.

14. The method of claim 9, wherein the shared memory is provided with 10 TX buffers and 10 RX buffers.

15. The method of claim 9, wherein the plurality of applications store each request packet in the shared memory by a circular queue method.

16. The method of claim 10, wherein the one parsing module stores the response packets in the shared memory by a circular queue method.

17. The method of claim 7, wherein the plurality of applications include a dialer, a camcorder, and a service menu.

18. The method of claim 7 further comprising transmitting a report packet transmitted from the modem to a corresponding application by an assignment.

19. The method of claim 7 further comprising a registration releasing step for stopping a modem usage of an application that does not require to use a modem any longer among the plurality of applications.