Method of mobile telecommunications

• US 6,651,211 B1
• Filed: 06/14/1999
• Issued: 11/18/2003
• Est. Priority Date: 06/15/1998
• Status: Expired due to Fees

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Abe, Masami, Kato, Toshio
• Primary Examiner(s): Baker, Stephen M.
• Application Number:
  US09/332,530
• Time in Patent Office: 1,618 Days
• Field of Search: 714/776, 714/762
• US Class Current: 714/762
• CPC Class Codes: H03M 13/23 using convolutional codes, e.g. unit memory codes
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control

Abstract

A to-be-sent signal (20) is comprised of a header (21) and convolution encoded data (22). An error correcting code (23) has a capability to correct a bit error or burst error contained in an objective data (24) placed apart from the header (21) in said convolution encoded data (22). Because an error arises easily in data placed apart from a header compared with that positioned near said header generally, said error correcting code (23) is added to data placed apart from said header and the addition of said error correcting code is omitted in data placed near to said header, thereby reducing whole information contents and transmission power.

Claims

1. A method of mobile telecommunications for sending a signal encoded after being sampled in a specified sampling cycle, with a header used for controlling added thereto, comprising a step of adding an error correcting code capable of error correction of only specified amounts of signals to specified amounts of signals placed farthest from said header of said encoded signal.

2. The method of mobile telecommunications of claim 1, wherein the error correcting code is a bit error correcting code.

3. The method of mobile telecommunications of claim 1, wherein the error correcting code is a burst error correcting code.

4. A method of mobile telecommunications for sending a signal encoded after being sampled in a specified sampling cycle, with a header used for controlling added thereto, comprising a step of adding an error correcting code capable of error correction of only data placed between headers neighboring each other and placed in an intermediate position apart from both headers neighboring each other, wherein the error correcting code is a burst error correcting code.

5. A method of mobile telecommunications for sending a signal encoded after being sampled in a specified sampling cycle, comprising the steps of:

providing a to-be-sent signal comprising a header and encoded data;

determining an error correcting code only for a portion of said encoded data furthest from said header; and

including said error correcting code in said to-be-sent signal at a nonadjacent position to said header.

6. The method of mobile telecommunications of claim 5, wherein said error correcting code is included at a position furthest from said header.

7. The method of mobile telecommunications of claim 5, wherein said error correcting code is included adjacent to said portion of said encoded data.

8. The method of mobile telecommunications of claim 5, wherein the error correcting code is a bit error correcting code.

9. The method of mobile telecommunications of claim 5, wherein the error correcting code is a burst error correcting code.

10. A method of mobile telecommunications for sending a signal encoded after being sampled in a specified sampling cycle, comprising the steps of:

providing a to-be-sent signal comprising a header and encoded data;

determining an error correcting code only for a portion of said encoded data being at an intermediate position of said encoded data between said header and a header of an adjacent to-be-sent signal and nonadjacent to either header; and

including said error correcting code in said to-be-sent signal at a nonadjacent position to either header.

11. The method of mobile telecommunications of claim 10, wherein said intermediate position of said encoded data is around a middle of said encoded data.

12. The method of mobile telecommunications of claim 10, wherein said error correcting code is included adjacent to said portion of said encoded data.

13. The method of mobile telecommunications of claim 10, wherein the error correcting code is a bit error correcting code.

14. The method of mobile telecommunications of claim 10, wherein the error correcting code is a burst error correcting code.