Turbo encoding/decoding device and method for processing frame data according to QoS

• US 6,928,604 B2
• Filed: 03/21/2003
• Issued: 08/09/2005
• Est. Priority Date: 03/31/1998
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hyeon-Woo, Park, Chang-Soo, Jeong, Joong-Ho
• Primary Examiner(s): Lamarre, Guy J.
• Application Number:
  US10/393,784
• Publication Number:
  US 20030188249A1
• Time in Patent Office: 872 Days
• Field of Search: 714794-796, 714752-758, 714/788, 714/790, 714/792, 714/701, 714/712, 714/774, 714/786, 370/333, 370/349, 370/337, 370/394, 370/473, 370/368, 370/347, 370/252, 370/441, 370/342, 370/316, 370/468, 370/331, 370/442, 370/470, 370/472, 370/476, 455/436, 455/442, 341/50, 341/51, 341 94- 95, 341/143, 382/239, 382/251, 375/341
• US Class Current: 714/788
• CPC Class Codes: H03M 13/27 using interleaving techniques
• CPC Class Codes: H03M 13/2789 Interleaver providing variable interleaving, e.g. variable block sizes
• CPC Class Codes: H03M 13/2903 Methods and arrangements specifically for encoding, e.g. parallel encoding of a plurality of constituent codes
• CPC Class Codes: H03M 13/2957 Turbo codes and decoding
• CPC Class Codes: H03M 13/35 Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
• CPC Class Codes: H03M 13/43 Majority logic or threshold decoding
• CPC Class Codes: H03M 13/49 Unidirectional error detection or correction
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/005 Iterative decoding, including iteration between signal detection and decoding operation
• CPC Class Codes: H04L 1/0055 MAP-decoding
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0066 Parallel concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27

Abstract

Disclosed is a turbo channel encoding and decoding device for a CDMA communication system. When the input data frames are very short, the device assembles input frames into one super frame of an appropriate length and then encodes and decodes the super frame. After frame encoding and decoding, the frames are reassembled into the original input frames.

Claims

1. A mobile communication system having input data frames of variable size, comprising:

a processor for determining the number of input data frames to concatenate to compose a super frame; and

a turbo encoder for turbo encoding the super frame consisting of more than one input data frame.

2. The mobile communication system as claimed in claim 1, wherein the turbo encoder comprises:

a first constituent encoder for encoding data of the super frame;

an interleaver for interleaving the data of the super frame; and

a second constituent encoder, operably connected to said interleaver, for encoding the interleaved data of the super frame.

3. The mobile communication system as claimed in claim 1, wherein said interleaver includes an interleaving address mapper for interleaving the data of the super frame.

4. The mobile communication system as claimed in claim 2, further comprising:

a multiplexer for multiplexing respective outputs of the first and second constituent encoders; and

a channel interleaver for interleaving an output of the multiplexer.

5. The mobile communication system as claimed in claim 1, wherein the processor determines to concatenate the input data frames if the data rate of the input data frame is less than 32 i/10 ms.

6. The mobile communication system as claimed in claim 1, further wherein the number of input data frames to make the super frame is determined by a data size of a frame.

7. The mobile communication system as claimed in claim 1, wherein the number of input data frames to compose the super frame is determined by a permissible delay.

8. The mobile communication system as claimed in claim 1, wherein the number of input data frames to compose the super frame is determined by a permissible error rate.

9. The mobile communication system as claimed in claim 1, wherein the number of input data frames to compose the super frame is determined by a receiver memory size.

10. A channel encoding method for a mobile communication system having turbo encoder input data frames of variable size, comprising the steps of:

determining the number of input data frames to construct a super frame;

concatenating the number of the input data frames into a super frame; and

turbo encoding data of the super frame consisting of more than one input data frame.

11. The channel encoding method as claimed in claim 10, wherein the turbo encoding step further comprises the steps of:

encoding data of the super frame;

interleaving data of the super frame; and

encoding data of the interleaved super frame.

12. The channel encoding method as claimed in claim 10, further comprising the step of channel interleaving the turbo encoded data in accordance with the size of the super frame.

13. The channel encoding method as claimed in claim 10, wherein the processor determines to concatenate the input data frames if the data rate of the input data frame is less than 32 kbps/10 ms.

14. The mobile communication system as claimed in claim 10, wherein the number of input data frames to construct the super frame is determined by a permissible delay.

15. The mobile communication system as claimed in claim 10, wherein the number of input data frames to construct the super frame is determined by a permissible error rate.

16. The mobile communication system as claimed in claim 10, wherein the number of input data frames to construct the super frame is determined by a receiver memory size.

17. A mobile communication system having turbo encoder input data frames of variable size, comprising:

a decoder for turbo decoding data being received as a super frame including a plurality of original input data frames; and

a frame reconstructor for segmenting an output of the turbo decoder into a number of original input data frames in accordance with a message information about the original input data frames constituting said super frame.

18. The mobile communication system as claimed in claim 17, further comprising a processor for determining a number and a size of original input data frames constituting said super frame based upon received message information about the number and the size of the original input data frames combined into the super frame, and providing the determined number and size information to the frame reconstructor.

19. The mobile communication system as claimed in claim 17, wherein said message information is received during a call setup.

20. The mobile communication system as claimed in claim 17, further comprising a processor for determining a number and a size of original input data frames constituting said super frame based upon received message information about the number and the size of the original input data frames combined into the super frame, and providing the determined number and size information to the frame reconstructor.

21. A channel decoding method for a mobile communication system having turbo encoder input data frames of variable size, comprising the steps of:

turbo decoding data received as a super frame including a plurality of original input data frames; and

segmenting an output of the decoder into a number of original input data frames in accordance with message information about the original input data frames constituting said super frame.

22. A mobile communication system having turbo encoder input data frames comprising:

a processor for determining to concatenate a number of input data frames to compose a super frame when a data rate of the input data frames is less than a predetermined value;

a first constituent encoder for encoding data of the super frame;

an interleaver for interleaving the data of the super frame;

a second constituent encoder for encoding output of the interleaver; and

a channel interleaver for interleaving the output of the turbo encoder.

23. The mobile communication system as claimed in claim 22, wherein the predetermined value is 32 kbps/10 ms.

24. A channel encoding method for a mobile communication system having turbo encoder input data frames of variable size, comprising the steps of:

comparing a data rate of input data frames to a turbo encoder with a predetermined value;

deciding to compose a super frame if the data rate is less than the predetermined value; and

turbo encoding the super frame which is composed of a number of input data frames.

25. The channel encoding method as claimed in claim 24, wherein the predetermined value is less than 32 kbps/10 ms.

26. A channel encoding method for a mobile communication system having turbo encoder input data frames of variable size, comprising the steps of:

determining a number of input data frames to construct a super frame according to a QoS (Quality of Service);

concatenating the number of input data frames into a super frame; and

turbo encoding data of the super frame.

27. The channel encoding method as claimed in claim 26, wherein the turbo encoding step further comprises the steps of:

encoding data of the super frame;

interleaving data of the super frame; and

encoding data of the interleaved super frame.

28. The channel encoding method as claimed in claim 26, further comprising the step of channel interleaving the turbo encoded data in accordance with the size of the super frame.

29. The channel encoding method as claimed in claim 26, wherein the QoS includes a data rate.

30. The channel encoding method as claimed in claim 29, wherein the data rate is less than 32 kbps/10 ms.

31. The mobile communication system as claimed in claim 26, wherein the QoS includes a permissible delay.

32. The mobile communication system as claimed in claim 26, wherein the QoS includes a permissible error rate.

33. The mobile communication system as claimed in claim 26, wherein the QoS includes a receiver memory size.