Apparatus and method for error correction in mobile wireless applications incorporating multi-level and adaptive erasure data

• US 8,185,804 B2
• Filed: 09/19/2006
• Issued: 05/22/2012
• Est. Priority Date: 09/19/2005
• Status: Expired due to Fees

• Current Assignee: ST-Ericcson SA (Telefonaktiebolaget LM Ericsson)
• Original Assignee: ST-Ericcson SA (Telefonaktiebolaget LM Ericsson)
• Inventors: Guo, Scott, Jayaraman, Manikantan
• Primary Examiner(s): Iqbal, Nadeem
• Application Number:
  US12/067,074
• Publication Number:
  US 20090259920A1
• Time in Patent Office: 2,072 Days
• Field of Search: 714 48- 51, 714/52, 714/57, 714/704, 714/746, 714752-761, 714/765, 714/766, 714/786, 714/787, 714/795, 714/798
• US Class Current: 714/776
• CPC Class Codes: H04L 1/0053 specially adapted for power saving
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0068 by puncturing

Abstract

A receiver (120) is configured to receive data over a communications link. A decapsulator (122) is coupled to the receiver and configured to create datagrams and erasure attributes associated with the datagrams. A decoder (124) is coupled to the decapsulator and configured to store the datagrams in a frame table and track the progression thereof to create codewords, the decoder storing the datagrams in table columns to create codewords in table rows, and configured to store the erasure attributes in an erasure table. A user interlace (126) is coupled to the decoder and configured to render images corresponding with the datagrams on the user interface. Advantages of the invention include improved signal reception and processing, and prolonged battery life in mobile wireless devices.

Claims

1. A device supporting error correction, comprising:

a receiver configured to receive data over a communications link;

a decapsulator coupled to the receiver and configured to create datagrams and erasure attributes associated with the datagrams;

a decoder coupled to the decapsulator and configured to store the datagrams in a frame table and track the progression thereof to create codewords, the decoder storing the datagrams in table columns to create codewords in table rows, wherein the decoder is further configured to store the erasure attributes in an erasure table and to adaptively assign erasure attributes to maximize the number of correctable errors in each codeword; and

a user interface connected directly to the decoder and configured to render images corresponding with the datagrams.

2. The device of claim 1, wherein the erasure table includes a plurality of entries each of which is associated with a column in the frame table.

3. The device of claim 1, wherein the progress attributes include a continuity counter value and the erasure attributes include a multi-bit erasure value.

4. The device of claim 3, wherein the decoder is configured to receive each datagram and to check the continuity counter value associated with each datagram, and when the continuity counter is not consistent with predefined continuity count to discard the packet and mark the packet as an erasure.

5. The device of claim 1, wherein the decoder is configured to assign erasure attributes to maximize the number of correctable errors in each codeword.

6. The device of claim 1, wherein the decoder is configured to check a packet ID and discard packets that do not match a predetermined packed ID.

7. The device of claim 3, wherein the decoder is configured to check the continuity counter value and determine if the continuity counter value is properly incremented, and when not, to discard the data associated with the improperly incremented continuity counter value.

8. The device of claim 3, wherein the decoder is configured to check the continuity counter value and determine if the continuity counter value is properly incremented, and when not, to assign a hole attribute to the data associated with the improperly incremented continuity counter value.

9. The device of claim 1, wherein the communications link is a wireless link and the data is digital television data.

10. A method of processing error correction, comprising:

receiving data over a communications link;

decapsulating the data to create datagrams and erasure attributes associated with the datagrams;

decoding the datagrams by storing the datagrams in a frame table and tracking the progression thereof to create codewords, the decoder storing the datagrams in table columns to create codewords in table rows, and configured to store the erasure attributes in an erasure table and to adaptively assign erasure attributes to maximize the number of correctable errors in each codeword; and

rendering images on a user interface corresponding with the datagrams on the user interface.

11. The method claim 10, wherein the erasure table includes a plurality of entries each of which is associated with a column in the frame table.

12. The method of claim 10, wherein the progress attributes include a continuity counter value and the erasure attributes include a multi-bit erasure value.

13. The method of claim 12, wherein the decoding step includes the steps of receiving each datagram and checking the continuity counter value associated with each datagram, and when the continuity counter is not consistent with predefined continuity count discarding the packet and mark the packet as an erasure.

14. The method of claim 10, wherein the decoding step includes the step of assigning erasure attributes to maximize the number of correctable errors in each codeword.

15. The method of claim 10, wherein the decoding step includes the steps of checking a packet ID and discarding packets that do not match a predetermined packed ID.

16. The method of claim 12, wherein the decoding step includes the steps of checking the continuity counter value and determining if the continuity counter value is properly incremented, and when not, discarding the data associated with the improperly incremented continuity counter value.

17. The method of claim 12, wherein the decoding step includes the step of checking the continuity counter value and determining if the continuity counter value is properly incremented, and when not, assigning a hole attribute to the data associated with the improperly incremented continuity counter value.

18. The method of claim 10, wherein the communications link is a wireless link and the data is digital television data.