System and method for optimal short message service (SMS) encoding in a wireless communications device

• US 7,761,511 B2
• Filed: 03/04/2002
• Issued: 07/20/2010
• Est. Priority Date: 03/04/2002
• Status: Expired due to Fees

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Kaplan, Diego
• Primary Examiner(s): Nguyen; Thu
• Assistant Examiner(s): TRUONG, LAN DAI T
• Application Number:
  US10/091,311
• Publication Number:
  US 20030167306A1
• Time in Patent Office: 3,060 Days
• Field of Search: 709205-206, 709/246, 379/88.17, 370/271, 370/260
• US Class Current: 709/205
• CPC Class Codes: H04M 1/7243 with interactive means for internal management of messages
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements

Abstract

A system and a method are provided for optimal Short Message System (SMS) encoding in a wireless communications device having SMS capabilities. The system includes an optimizing subsystem and an encoding subsystem. The optimizing subsystem accepts an SMS message, identification of available encoding formats, and information regarding wireless device resource encoding requirements, such as memory usage, for the available encoding formats. The optimizing subsystem evaluates the characters in the SMS message to identify which of the available encoding formats are usable for encoding the characters, determines a memory usage requirement, and selects, as the optimal encoding format, the usable encoding format having the lowest memory usage. The optimizing subsystem supplies an optimizing signal identifying the optimal encoding format. The encoding subsystem accepts the SMS message and the optimizing signal, and encodes the message in the optimal encoding format. The encoding subsystem supplies the encoded SMS message to a wireless device memory circuit. The memory circuit supplies the stored SMS message for presentation on a user display or transmission by a transceiver.

Claims

1. A system for optimal Short Message Service (SMS) character encoding in a wireless communications device having SMS capabilities, the system comprising:

an optimizing subsystem with an input to accept an SMS message, an input to accept an evaluation control signal, and an output to supply an optimizing signal responsive to SMS message character encoding requirements prior to character encoding of the SMS message; and

a character encoding subsystem with an input to accept the SMS message, an input to accept the optimizing signal, and an output to supply the SMS message in a character encoding format responsive to the optimizing signal.

2. The system of claim 1 wherein the evaluation control signal identifies character encoding formats available in the wireless communication device and available encoding format parameters including the number of bits needed to represent characters.

3. The system of claim 2 wherein the optimizing subsystem is configured to:

evaluate the SMS message to identify the available character encoding formats usable for encoding the characters, determine a memory usage requirement select, as the optimal encoding format, a usable format with a minimum memory usage, and supply the identity of the optimal encoding format in the optimizing signal.

4. The system of claim 3 wherein the character encoding subsystem is configured to encode the SMS message in the optimal encoding format to generate an encoded SMS message and is further configured to supply the encoded SMS message at an output.

5. The system of claim 4 further comprising:

a memory circuit having an input to accept the encoded SMS message for storage and having an output to supply the stored SMS message.

6. The system of claim 5 wherein the wireless device is Mobile Origination enabled and the optimizing subsystem accepts the SMS message from a user interface, the system further comprising:

a transceiver having an input to accept the stored SMS message from the memory circuit for airlink transmission.

7. The system of claim 5 wherein the transceiver is configured to accept an airlink communication including an SMS message

and the optimizing subsystem is configured to accept the SMS message from the transceiver,

the system further comprising a user interface having an input to accept the stored SMS message for presentation.

8. The system of claim 5 wherein the character encoding subsystem uses seven-bit ASCII as a default optimal encoding format.

9. A method of encoding a Short Message Service (SMS) message, the method comprising:

encoding a SMS message using a SMS character encoding format to generate an encoded SMS message; and

prior to encoding the SMS message, selecting the SMS character encoding format based on a wireless device resource requirement of the encoded SMS message.

10. The method of claim 9, wherein the selecting comprises selecting the SMS character encoding format from a plurality of available encoding formats supported by a wireless communication device.

11. The method of claim 10, further comprising:

identifying the SMS character encoding format as usable for encoding the SMS message.

12. The method of claim 11 wherein identifying the SMS character encoding format as usable for encoding the SMS message comprises:

evaluating an English-language SMS message;

identifying seven-bit ASCII, IS0 Latin 1, and Unicode formats as usable;

determining a number of bits needed to represent characters in the seven-bit ASCII, IS0 Latin 1, and Unicode formats; and

selecting the seven-bit ASCII format as the SMS encoding format.

13. The method of claim 11, wherein the identifying the SMS character encoding format comprises determining a number of bits needed to represent characters in the available encoding format.

14. The method of claim 10, further comprising determining a memory usage requirement of the encoded SMS message.

15. The method of claim 10, wherein selecting the SMS character encoding format comprises selecting seven-bit ASCII as a default SMS character encoding format.

16. The method of claim 9, further comprising:

receiving the SMS message at a Mobile Origination enabled wireless device via a user interface; and

storing the SMS encoded message.

17. The method of claim 9, further comprising:

receiving the SMS message at a Mobile Origination enabled wireless device via a user interface; and

transmitting the encoded SMS message.

18. A Short Message Service (SMS) character encoding system configured to generate an encoded SMS message by encoding a SMS message using a SMS character encoding format and, prior to encoding the SMS message, selecting the SMS character encoding format based on a resource requirement of the encoded SMS message.

19. The SMS encoding system of claim 18, comprising:

a character encoding subsystem comprising an input for receiving a signal indicating the SMS character encoding format, the encoding subsystem configured to encode the SMS message in accordance with the signal; and

an optimizing subsystem configured to identify, prior to encoding of the SMS message, the SMS character encoding format from a plurality of SMS character encoding formats based on resources requirements corresponding to encoding the SMS message for each of the plurality of SMS character encoding formats, the optimizing subsystem comprising an output for generating the signal.

20. The SMS character encoding system of claim 19, wherein the resource requirement is an amount of memory required to store the encoded SMS message.