Mapping of subpackets to resources in a communication system

• US 8,320,407 B2
• Filed: 01/02/2008
• Issued: 11/27/2012
• Est. Priority Date: 01/05/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Palanki, Ravi, Lin, Jeremy H., Khandekar, Aamod, Gorokhov, Alexei, Agrawal, Avneesh
• Primary Examiner(s): Lai, Andrew
• Application Number:
  US11/968,631
• Publication Number:
  US 20080240159A1
• Time in Patent Office: 1,791 Days
• Field of Search: 370/441, 370/442, 370/474, 370/478, 370/498, 375/130, 375/131, 375/132, 375/138
• US Class Current: 370/478
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation

Abstract

Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least N_MIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.

Claims

1. An apparatus for communication, comprising:

at least one processor configured to determine resources assigned for transmission of a packet, to partition the packet into multiple subpackets, and to map the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources; and

a memory coupled to the at least one processor;

wherein the assigned resources comprise multiple tiles, each tile corresponding to a block of time frequency resources; and

wherein the at least one processor is configured to arrange the multiple tiles into a first group of at least two tiles and a second group of remaining tiles, to map a subset of the multiple subpackets to each tile in the second group, and to map all of the multiple subpackets to each tile in the first group.

2. The apparatus of claim 1, wherein the at least one processor is configured to encode each subpacket based on a forward error correction (FEC) code to obtain a corresponding coded subpacket.

3. The apparatus of claim 1, wherein each tile corresponds to a block of contiguous time frequency resources.

4. The apparatus of claim 3, wherein the at least one processor is configured to map each of the multiple subpackets to a particular minimum number of tiles greater than one or to all of the multiple tiles if fewer than the particular minimum number of tiles are available.

5. The apparatus of claim 1, wherein the tiles correspond to blocks of time frequency resources distributed across system bandwidth.

6. The apparatus of claim 1, wherein the at least one processor is configured to map each of the multiple subpackets to a different subset of the multiple tiles.

7. The apparatus of claim 1, wherein the at least one processor is configured to map each of the multiple subpackets to an equal number of tiles greater than one.

8. The apparatus of claim 1, wherein the first group includes an integer multiple oft tiles, where t is the number of subpackets.

9. The apparatus of claim 1, wherein the at least one processor is configured to determine a plurality of subpackets mapped to one of the tiles and to distribute a portion of each of the plurality of subpackets across the one tile.

10. The apparatus of claim 1, wherein for each of the multiple tiles the at least one processor is configured to distribute the at least one subpacket across the one tile by cycling through the at least one subpacket and mapping one subpacket to each available transmission unit in the one tile.

11. A method of transmitting data, comprising:

determining resources assigned for transmission of a packet;

partitioning the packet into multiple subpackets; and

mapping the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources;

wherein the assigned resources comprise multiple tiles, and wherein the mapping the multiple subpackets comprises;

arranging the multiple tiles into a first group of an integer multiple of t tiles and a second group of remaining tiles, where t is the number of subpackets,

mapping a subset of the multiple subpackets to each tile in the second group, and

mapping all of the multiple subpackets to each tile in the first group.

12. The method of claim 11, further comprising:

encoding each subpacket based on a forward error correction (FEC) code to obtain a corresponding coded subpacket.

13. The method of claim 11, wherein the mapping the multiple subpackets comprises

mapping each of the multiple subpackets to at least one of a different subset of the multiple tiles, an equal number of tiles, a particular minimum number of tiles, and all of the multiple tiles if fewer than the particular minimum number of tiles.

14. An apparatus for communication, comprising:

means for determining resources assigned for transmission of a packet;

means for partitioning the packet into multiple subpackets; and

means for mapping the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources;

wherein the assigned resources comprise multiple tiles, and wherein the means for mapping the multiple subpackets comprises

means for arranging the multiple tiles into a first group of an integer multiple of t tiles and a second group of remaining tiles, where t is the number of subpackets,

means for mapping a subset of the multiple subpackets to each tile in the second group, and

means for mapping all of the multiple subpackets to each tile in the first group.

15. The apparatus of claim 14, further comprising:

means for encoding each subpacket based on a forward error correction (FEC) code to obtain a corresponding coded subpacket.

16. The apparatus of claim 14, wherein the means for mapping the multiple subpackets comprises

means for mapping each of the multiple subpackets to at least one of a different subset of the multiple tiles, an equal number of tiles, a particular minimum number of tiles, and all of the multiple tiles if fewer than the particular minimum number of tiles.

17. A computer program product, comprising:

a non-transitory computer-readable medium comprising;

code for causing at least one computer to determine resources assigned for transmission of a packet, wherein the assigned resources comprise multiple tiles, each tile corresponding to a block of time frequency resources;

code for causing the at least one computer to partition the packet into multiple subpackets;

code for causing the at least one computer to map the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources; and

code for causing the at least one computer to arrange the multiple tiles into a first group of at least two tiles and a second group of remaining tiles;

code for causing the at least one computer to map a subset of the multiple subpackets to each tile in the second group; and

code for causing the at least one computer to map all of the multiple subpackets to each tile in the first group.

18. An apparatus for communication, comprising:

at least one processor configured to determine resources assigned for transmission of a packet, to receive multiple subpackets of the packet via the assigned resources, to demap the multiple subpackets from the assigned resources, with at least one subpacket being demapped from a subset of the assigned resources, and to process the multiple subpackets after demapping to recover the packet; and

a memory coupled to the at least one processors;

wherein the assigned resources comprise multiple tiles, each tile corresponding to a block of time frequency resources; and

wherein the at least one processor is configured to perform demodulation for each of the multiple tiles and to perform decoding for each of the multiple subpackets when all tiles to which the subpacket is mapped have been demodulated without waiting for all of the multiple tiles to be demodulated.

19. The apparatus of claim 18, wherein the at least one processor is configured to decode each subpacket based on a forward error correction (FEC) code to obtain a corresponding decoded subpacket.

20. The apparatus of claim 18, wherein the at least one processor is configured to demap each of the multiple subpackets from a different subset of the multiple tiles.

21. The apparatus of claim 18, wherein the at least one processor is configured to demap each of the multiple subpackets from a particular minimum number of tiles or from all of the multiple tiles if fewer than the particular minimum number of tiles.

22. The apparatus of claim 18, wherein the at least one processor is configured to demap each of the multiple subpackets from an equal number of tiles.

23. The apparatus of claim 18, wherein for each of the multiple tiles the at least one processor is configured to determine at least one subpacket mapped to the tile and to demap the at least one subpacket from across the tile.

24. A method of receiving data, comprising:

determining resources assigned for transmission of a packet;

receiving multiple subpackets of the packet via the assigned resources;

demapping the multiple subpackets from the assigned resources, with at least one subpacket being demapped from a subset of the assigned resources; and

processing the multiple subpackets after demapping to recover the packet;

wherein the assigned resources comprise multiple tiles, and wherein the processing the multiple subpackets comprises;

performing demodulation for each of the multiple tiles, and

performing decoding for each of the multiple subpackets when all tiles to which the subpacket is mapped have been demodulated without waiting for all of the multiple tiles to be demodulated.

25. The method of claim 24, wherein the processing the multiple subpackets comprises decoding each subpacket based on a forward error correction (FEC) code to obtain a corresponding decoded subpacket.

26. The method of claim 24, wherein the demapping the multiple subpackets comprises

demapping each of the multiple subpackets from at least one of a different subset of the multiple tiles, a particular minimum number of tiles, all of the multiple tiles if fewer than the particular minimum number of tiles, and an equal number of tiles.

27. An apparatus for communication, comprising:

means for determining resources assigned for transmission of a packet;

means for receiving multiple subpackets of the packet via the assigned resources;

means for demapping the multiple subpackets from the assigned resources, with at least one subpacket being demapped from a subset of the assigned resources; and

means for processing the multiple subpackets after demapping to recover the packet;

wherein the assigned resources comprise multiple tiles, and wherein the means for processing the multiple subpackets comprises

means for performing demodulation for each of the multiple tiles; and

means for performing decoding for each of the multiple subpackets when all tiles to which the subpacket is mapped have been demodulated without waiting for all of the multiple tiles to be demodulated.

28. The apparatus of claim 27, wherein the means for processing the multiple subpackets comprises means for decoding each subpacket based on a forward error correction (FEC) code to obtain a corresponding decoded subpacket.

29. The apparatus of claim 27, wherein the means for demapping the multiple subpackets comprises

means for demapping each of the multiple subpackets from at least one of a different subset of the multiple tiles, a particular minimum number of tiles, all of the multiple tiles if fewer than the particular minimum number of tiles, and an equal number of tiles.

30. A computer program product, comprising:

a non-transitory computer-readable medium comprising;

code for causing at least one computer to determine resources assigned for transmission of a packet, the assigned resources comprising multiple tiles;

code for causing the at least one computer to receive multiple subpackets of the packet via the assigned resources;

code for causing the at least one computer to demap the multiple subpackets from the assigned resources, with at least one subpacket being demapped from a subset of the assigned resources;

code for causing the at least one computer to process the multiple subpackets after demapping to recover the packet;

code for performing demodulation for each of the multiple tiles, and

code for performing decoding for each of the multiple subpackets when all tiles to which the subpacket is mapped have been demodulated without waiting for all of the multiple tiles to be demodulated.

31. A communication apparatus comprising:

at least one processor configured to determine resources assigned for transmission of a packet, to partition the packet into multiple subpackets, and to map the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources; and

a memory coupled to the at least one processor;

wherein the assigned resources comprise multiple tiles each corresponding to a block of contiguous time frequency resources; and

wherein the at least one processor is configured to map each of the multiple subpackets to a particular minimum number of tiles greater than one or to all of the multiple tiles if fewer than the particular minimum number of tiles are available; and

wherein the at least one processor is configured to determine a plurality of subpackets mapped to one of the tiles and to distribute a portion of each of the plurality of subpackets across the one tile.

32. The apparatus of claim 31 wherein the at least one processor is configured to map each of the multiple subpackets to an equal number of tiles greater than one.

33. An communication apparatus comprising:

means for determining resources assigned for transmission of a packet, means for partitioning the packet into multiple subpackets, and means for mapping the multiple subpackets to the assigned resources, with at least one subpacket being mapped to a subset of the assigned resources; and

a memory coupled to the at least one processor;

wherein the assigned resources comprise multiple tiles each corresponding to a block of contiguous time frequency resources; and

wherein the means for mapping are configured to map each of the multiple subpackets to a particular minimum number of tiles greater than one or to all of the multiple tiles if fewer than the particular minimum number of tiles are available; and

wherein the means for mapping are configured to determine a plurality of subpackets mapped to one of the tiles and to distribute a portion of each of the plurality of subpackets across the one tile.

34. The apparatus of claim 33 wherein the means for mapping are configured to map each of the multiple subpackets to an equal number of tiles greater than one.

35. A computer program product residing on a non-transitory processor-readable medium of a communication apparatus and comprising processor-readable instructions configured to cause a processor to:

determine resources assigned for transmission of a packet, the assigned resources comprising multiple tiles each corresponding to a block of contiguous time frequency resources;

partition the packet into multiple subpackets; and

map the multiple subpackets to the assigned resources, with each of the multiple subpackets being mapped to a particular minimum number of tiles greater than one or to all of the multiple tiles if fewer than the particular minimum number of tiles are available; and

determine a plurality of subpackets mapped to one of the tiles and distribute a portion of each of the plurality of subpackets across the one tile.

36. The computer program product of claim 35 wherein the instructions configured to cause the processor to map the multiple subpackets are configured to cause the processor to map each of the multiple subpackets to an equal number of tiles greater than one.