Short message conversion between different formats for wireless communication systems

• US 20040008723A1
• Filed: 07/09/2002
• Published: 01/15/2004
• Est. Priority Date: 07/09/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Uchida, Nobuyuki, Qu, Hai
• Granted Patent: US 7,072,359 B2
• Time in Patent Office: Days
• US Class Current: 370/466
• CPC Class Codes: H04L 51/066 Format adaptation, e.g. format conversion or compression
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication
• CPC Class Codes: H04W 4/14 Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 88/184 Messaging devices, e.g. message centre
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Techniques for converting short messages between different formats (e.g., from GSM SMS to CDMA SMS) such that pertinent control information is retained without changing the fundamental structure of these message formats. A new value is defined for the Msg_Encoding field in the User Data subparameter of the CDMA SMS message to indicate that the content of this message is an encapsulated GSM SMS message. The Message_Type field in the User Data subparameter may be used to carry data coding scheme information for the encapsulated GSM SMS message. At a recipient mobile station, the value in the Msg_Encoding field is checked to determine whether or not the CDMA SMS message includes an encapsulated GSM SMS message. If the answer is yes, then the user data in the CHARi fields of the CDMA SMS message is processed based on the data coding scheme information from the Message_Type field.

Claims

1. In a wireless communication system, a method for converting a first short message in a first format to a second short message in a second format, comprising:

setting a first field in the second message to a value indicative of a short message originally in the first format being included in the second message;

setting a second field in the second message to a value indicative of a data coding scheme used for the first message; and

setting a data field in the second message to data included in the first message.

2. The method of claim 1, further comprising:

setting a length field in the second message to a value indicative of the length of the data included in the first message.

3. The method of claim 1, wherein the first short message is a GSM SMS message and the second short message is a CDMA SMS message.

4. The method of claim 3, wherein the first field is a Msg_Encoding field and the data field is a CHARi field in a User Data subparameter of the CDMA SMS message.

5. The method of claim 3, wherein the second field is a Message_Type field in a User Data subparameter of the CDMA SMS message.

6. The method of claim 5, wherein the Message_Type field is set to the data coding scheme indicated in a TP-Data-Coding-Scheme field of the first message.

7. In a wireless communication system, a method for converting a CDMA SMS message to a GSM SMS message, comprising:

setting a TP-Data-Coding-Scheme field in the GSM SMS message to a value in a designated field in the CDMA SMS message and indicative of a data coding scheme used for the GSM SMS message; and

setting a TP-User-Data field in the GSM SMS message to data in CHARi fields in the CDMA SMS message.

8. The method of claim 7, wherein the designated field is a Message_Type field in a User Data subparameter of the CDMA SMS message.

9. The method of claim 7, further comprising:

detecting for a value in a Msg_Encoding field in the User Data subparameter of the CDMA SMS message; and

performing the converting from the CDMA SMS message to the GSM SMS message if the detected value indicates that the CDMA SMS message includes an encapsulated GSM SMS message.

10. A method for processing a received short message in a wireless communication system, comprising:

obtaining a value in a first field in the received short message;

determining whether or not the received short message includes an encapsulated message based on the value obtained from the first field; and

if the received short message includes an encapsulated message, obtaining from a second field in the received short message a value

indicative of a data coding scheme used for the encapsulated message, and processing data in the received short message based on the data coding scheme.

11. The method of claim 10, wherein the processing includes

decompressing the data in the received short message if the data coding scheme indicates that the data has been compressed.

12. The method of claim 10, further comprising:

if the received short message does not include an encapsulated message,

processing the data in the received short message based on the value obtained from the first field.

13. The method of claim 10, wherein the received short message is a CDMA SMS message and the encapsulated message is a GSM SMS message.

14. The method of claim 13, wherein the first field is a Msg_Encoding field and the second field is a Message_Type field in a User Data subparameter of the CDMA SMS message.

15. An apparatus in a wireless communication system and operable to convert a first short message in a first format to a second short message in a second format, comprising:

means for setting a first field in the second message to a value indicative of a short message originally in the first format being included in the second message;

means for setting a second field in the second message to a value indicative of a data coding scheme used for the first message; and

means for setting a data field in the second message to data included in the first message.

16. The apparatus of claim 15, further comprising:

means for setting a length field in the second message to a value indicative of the length of the data included in the first message.

17. The apparatus of claim 15, wherein the first short message is a GSM SMS message and the second short message is a CDMA SMS message.

18. An apparatus in a wireless communication system and operable to process a received short message, comprising:

means for obtaining a value in a first field in the received short message;

means for determining whether or not the received short message includes an encapsulated message based on the value obtained from the first field;

means for obtaining from a second field in the received short message a value indicative of a data coding scheme used for the encapsulated message, if the received short message includes an encapsulated message; and

means for processing data in the received short message based on the data coding scheme, if the received short message includes an encapsulated message.

19. The apparatus of claim 18, further comprising:

means for decompressing the data in the received short message if the data coding scheme indicates that the data has been compressed.

20. The apparatus of claim 18, further comprising:

means for processing the data in the received short message based on the value obtained from the first field, if the received short message does not include an encapsulated message.

21. The apparatus of claim 18, wherein the received short message is a CDMA SMS message and the encapsulated message is a GSM SMS message