Method for encoding data blocks
View Patent ↗Prior to transferring to a radio communication system, at least one data block is encoded according to predetermined quality-of-service requirements with the aid of a first code. Subsequently, the data block, encoded by the first code, is further encoded according to the radio transmission properties of a usable radio transmission source with the aid of a second code.
1. A method for encoding data blocks for radio transmission in a radio communication system, in which a multicarrier, orthogonal frequency division multiplexing transmission method with a plurality of subcarriers is used, with adjacent subcarriers being used to dimension a radio transmission resource, comprising:
encoding in a link layer at least one data block using a first code based on predefined quality of service requirements to produce at least one encoded data block;
encoding in a physical layer the at least one encoded data block using a second code based on radio transmission properties of the radio transmission resource provided for transmission, and
encoding and transmitting check bits which were generated for the first code together with the second code as part of an ARQ method; and
wherein the quality of service requirements depend on selected services of a subscriber.
2. The method as claimed in claim 1 , wherein the radio transmission resource is dimensioned, on the one hand, by subcarriers and, on another hand, by a time slot which can be assigned to the subcarriers.
3. The method as claimed in claim 2 , further comprising setting at least one of a code length and a code rate of an error correction code in a flexible manner adapted to a respective length and to error correction requirements of a link layer data block, and
wherein the error correction code is used for the first encoding operation.
4. The method as claimed in claim 3 , further comprising setting at least one of the first and second codes by a subscriber as part of the quality of service requirements.
5. The method as claimed in claim 4 , wherein said encoding in the physical layer is carried out based on selected modulation of the multicarrier, orthogonal frequency division multiplexing transmission method.
6. The method as claimed in claim 5 ,
wherein said encoding in the physical layer results in a further encoded data block, and
wherein said method further comprises dividing the further encoded data block among a number of radio transmission resources to be used.
7. The method as claimed in claim 6 , further comprising assembling the data block in the link layer from a plurality of data blocks of a layer 3 , prior to said encoding in the link layer.
8. The method as claimed in claim 7 , further comprising retransmitting as part of an ARQ method only incorrectly decoded code words of the second code.
9. The method as claimed in claim 7 , further comprising retransmitting an entire code word which has been divided among the radio transmission resources as part of an ARQ method.
10. The method as claimed in claim 7 , wherein a radio transmission resource is assigned to at least two subscribers which can be distinguished using different encoding.
11. A radio communication system for encoding data blocks for radio transmission, in which a multicarrier, orthogonal frequency division multiplexing transmission method with a plurality of subcarriers is used, with adjacent subcarriers being used to dimension a radio transmission resource, comprising:
the radio communication system configured to implement an operation including:
encoding in a link layer at least one data block using a first code based on predefined quality of service requirements to produce at least one encoded data block;
encoding in a physical layer the at least one encoded data block using a second code based on radio transmission properties of the radio transmission resource provided for transmission, and
encoding and transmitting check bits which were generated for the first code together with the second code as part of an ARQ method; and
wherein the quality of service requirements depend on selected services of a subscriber.
12. The system as claimed in claim 11 , wherein the radio transmission resource is dimensioned, on the one hand, by subcarriers and, on another hand, by a time slot which can be assigned to the subcarriers.
13. The system as claimed in claim 12 , wherein at least one of a code length and a code rate of an error correction code is set in a flexible manner adapted to a respective length and to error correction requirements of a link layer data block, and
wherein the error correction code is used by said encoding in the link layer.
14. The system as claimed in claim 13 , wherein at least one of the first and second codes is set by a subscriber as part of the quality of service requirements.
15. The system as claimed in claim 14 , wherein said encoding in the physical layer is carried out based on selected modulation of the multicarrier, orthogonal frequency division multiplexing transmission method.
16. The system as claimed in claim 15 , wherein said encoding in the physical layer produces a further encoded data block, and
wherein said system further comprises dividing the further encoded data block among a number of radio transmission resources to be used.
17. The system as claimed in claim 16 , wherein the operation includes assembling the data block in the link layer from a plurality of data blocks of a layer 3 , prior to the encoding in the link layer.
18. The system as claimed in claim 17 , wherein the operation includes retransmitting as part of an ARQ method only incorrectly decoded words of the second code.
19. The system as claimed in claim 17 , wherein the operation includes retransmitting an entire code word which has been divided among the radio transmission resources as part of an ARQ method.
20. The system as claimed in claim 17 , wherein a radio transmission resource is assigned to at least two subscribers which can be distinguished using different encoding.