Device and method for transmitting/receiving a packet in communication system

• US 9,578,292 B2
• Filed: 11/23/2012
• Issued: 02/21/2017
• Est. Priority Date: 11/24/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hwang, Sung-Hee, Park, Kyung-Mo, Rhyu, Sung-Ryeul, Yang, Hyun-Koo, Hwang, Sung-Oh
• Primary Examiner(s): Abraham, Esaw
• Application Number:
  US14/360,480
• Publication Number:
  US 20140314158A1
• Time in Patent Office: 1,551 Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• 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 13/3761 using code combining, i.e. using combining of codeword portions which may have been transmitted separately, e.g. Digital Fountain codes, Raptor codes or Luby Transform [LT] codes
• CPC Class Codes: H03M 13/618 Shortening and extension of codes
• CPC Class Codes: H03M 13/6356 by repetition or insertion of dummy data, i.e. rate reduction
• CPC Class Codes: H03M 13/6362 by puncturing
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0066 Parallel 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 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/008 where the control data relates to payload of a different packet
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder

Abstract

The present invention relates to a device and method for transmitting/receiving a packet in a communication system. The present invention includes: the processes of determining at least one MPEG media transport (MMT) asset protected by an application layer forward error correction (AL-FEC); determining at least one FEC flow for transmitting the at least one MMT asset; determining the MMT asset transmitted from the at least one FEC flow in each case and determining an FEC coding structure to apply to the at least one FEC flow; producing at least one source flow by dividing the MMT asset transmitted from the at least one FEC flow on a transmission unit basis; and producing and transmitting at least one parity flow by performing AL-FEC encoding on the at least one source flow according to the FEC coding structure.

Claims

1. A method for transmitting a packet in a communication system, the method comprising:

determining at least one motion picture experts group (MPEG) media transport (MMT) asset to be protected by a forward error correction (FEC);

determining a number of FEC source flows comprising MMT packets carrying the MMT asset;

identifying an FEC configuration information based on an FEC coding structure and an FEC code to be applied to the FEC source flows;

generating repair symbols composing at least one FEC repair flow by performing an FEC coding for the FEC source flows by using the FEC code;

generating FEC repair packets corresponding to each of the repair symbols, and transmitting the FEC repair packets to a receiving entity; and

transmitting an FEC message including the FEC configuration information to the receiving entity.

2. The method of claim 1, wherein the FEC message comprises at least one of:

information indicating whether there is at least one source flow applied to the FEC coding;

information on an FEC flow descriptor indicating information on the FEC flow; and

information on a length of the FEC flow descriptor.

3. The method of claim 2, wherein the FEC flow descriptor comprises at least one of:

information on a source flow identifier for identifying an FEC source flow;

information on the FEC flow identifier for identifying an FEC encoded flow;

information on a number of FEC encoded flows;

information on a number of assets that belongs to a same FEC source flow; and

information indicating an applied FEC coding structure for an associated FEC source flow.

4. The method of claim 2, wherein the FEC flow descriptor comprises at least one of:

information for indicating a type of mode used for generating a source symbol block;

information on a length of a repair symbol;

information on a number of repair symbol carried in an FEC repair packet; and

information on a number of symbol element consisting a source symbol.

5. The method of claim 2, wherein, if the FEC coding structure is a one stage FEC coding structure, the FEC flow descriptor comprises at least one of:

information on a repair flow identifier identifying FEC repair flow;

information on an applied FEC code for an associated FEC repair flow;

information on a maximum k for indicating a maximum allowed number of source symbols in a source symbol block for the associated FEC repair flow; and

information on a maximum p for indicating a maximum allowed number of repair symbols in a repair symbol block for the associated FEC repair flow.

6. The method of claim 2, wherein, if the FEC coding structure is a two stage FEC coding structure, the FEC flow descriptor comprises at least one of:

information on a number of source subblocks consisting of a source packet block for the two stage FEC coding structure;

information on a repair flow identifier identifying FEC repair flow;

information on an applied FEC code for an associated FEC repair flow;

information on a maximum k for indicating a maximum allowed number of source symbols in a source symbol block for the associated FEC repair flow; and

information on a maximum p for indicating a maximum allowed number of repair symbols in a repair symbol block for the associated FEC repair flow.

7. The method of claim 2, wherein, if the FEC coding structure is a layer-aware FEC coding structure, the FEC flow descriptor comprises at least one of:

information on an applied FEC code for an associated FEC repair flow;

information on a repair flow identifier identifying FEC repair flow;

information on a maximum k for indicating a maximum allowed number of source symbols in a source symbol block for the associated FEC repair flow; and

information on a maximum p for indicating a maximum allowed number of repair symbols in a repair symbol block for the associated FEC repair flow.