Control resource mapping for a wireless communication system

• US 8,681,749 B2
• Filed: 01/02/2008
• Issued: 03/25/2014
• Est. Priority Date: 01/04/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Khandekar, Aamod, Gorokhov, Alexei, Bhushan, Naga, Sarkar, Sandip, Palanki, Ravi
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): ZUNIGA ABAD, JACKIE
• Application Number:
  US11/968,642
• Publication Number:
  US 20080167040A1
• Time in Patent Office: 2,274 Days
• Field of Search: None
• US Class Current: 370/335
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04L 1/1692 Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/60 using different transmission rates for TPC commands
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

Techniques for sending control information in a wireless communication system are described. A control segment may include L≧1 tiles, and each tile may include a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For symmetric mapping, multiple sets of S≧1 control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. For localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. For distributed mapping, S=1, and each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at least one tile.

Claims

1. An apparatus for wireless communication, comprising:

a processor; and

a memory coupled to the processor, wherein the memory stores instructions executable by the processor to perform operations comprising;

receiving a control resource index R of a control resource;

calculating a tile index h and a transmission unit index r based on the control resource index R;

mapping the control resource to a transmission unit with the transmission unit index r in a tile with the tile index h, wherein the transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of a control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each of the tiles comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit;

allocating the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocating the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

2. The apparatus of claim 1, wherein the tile index h and the transmission unit index r are calculated based on a mapping scheme that distributes the plurality of control resources across the L tiles for any value of L.

3. The apparatus of claim 1, wherein the operations further comprise:

forming multiple sets of S control resources of the plurality of control resources, where S is a second positive integer; and

mapping each batch of L consecutive sets of S control resources to S transmission units at same location in the L tiles.

4. The apparatus of claim 1, wherein the operation further comprise:

forming multiple sets of S control resources of the plurality of control resources, where S is an integer greater than one, and mapping each set of S control resources to a cluster of S adjacent transmission units in each of at least one tile among the L tiles.

5. The apparatus of claim 1, wherein the operations further comprise mapping each set of S control resources once to at least one tile determined by cycling through the L tiles.

6. The apparatus of claim 1, wherein the operations further comprise:

forming multiple sets of four control resources of the plurality of control resources of the control segment; and

mapping each set of four control resources to four adjacent transmission units in each of at least one tile among the L tiles.

7. The apparatus of claim 1, wherein the operations further comprise mapping each control resource once to at least one tile determined by cycling through the L tiles.

8. The apparatus of claim 1, wherein the operations further comprise mapping the control resource to multiple transmission units in at least one tile among the L tiles to obtain diversity of the control resource, the multiple transmission units comprising the transmission unit with the transmission unit index r in the tile with the tile index h.

9. The apparatus of claim 8, wherein the operations further comprise mapping the control resource to the multiple transmission units in different locations of the at least one tile.

10. The apparatus of claim 1, wherein the operations further comprise mapping the control resource to three transmission units in at least one tile among the L tiles to obtain third order diversity of the control resource, the three transmission units comprising the transmission unit with the transmission unit index r in the tile with the tile index h.

11. The apparatus of claim 10, wherein indices of the three transmission units in the at least one tile are calculated based on the transmission unit index r.

12. The apparatus of claim 10, wherein the three transmission units are in three different tiles when L is equal to three or greater.

13. The apparatus of claim 1, wherein each tile is associated with multiple tile segments, each tile segment including a different subset of the plurality of transmission units in the tile, and wherein the control resource is mapped to one transmission unit in each of the multiple tile segments associated with the at least one tile among the L tiles.

14. The apparatus of claim 13, wherein transmission units in each tile segment have pre-assigned indices.

15. The apparatus of claim 1, wherein transmission units available for use in each tile are assigned unique indices, and wherein the control resource is mapped to multiple transmission units with different indices in at least one tile among the L tiles, and wherein the indices of the multiple transmission units are calculated based on the transmission unit index r.

16. The apparatus of claim 15, wherein the indices of the multiple transmission units are spaced apart by M, where M is a second integer that is greater than one and determined based on a number of transmission units available for use in each tile and a number of transmission units to which the control resource is mapped.

17. The apparatus of claim 1, wherein the operations further comprise sending control information via the control resource to at least one terminal.

18. The apparatus of claim 1, wherein the operations further comprise receiving control information via the control resource from a base station.

19. The apparatus of claim 1, wherein the plurality of control resources are assigned to a plurality of control channels one control channel at a time and in a particular order.

20. A method for wireless communication, comprising:

receiving a control resource index R of a control resource;

calculating a tile index h and a transmission unit index r based on the control resource index R; and

mapping the control resource to a transmission unit with the transmission unit index r in a tile with the tile index h, wherein the transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of a control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit;

allocating the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocating the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

21. The method of claim 20, further comprising:

forming multiple sets of S control resources of the plurality of control resources, where S is a second positive integer; and

mapping each batch of L consecutive sets of S control resources to S transmission units at the same location in the L tiles.

22. The method of claim 20, further comprising:

forming multiple sets of S control resources for the plurality of control resources, where S is a second positive integer; and

mapping each set of S control resources to a cluster of S adjacent transmission units in each of at least one tile among the L tiles.

23. The method of claim 20, further comprising:

forming multiple sets of S control resources for the plurality of control resources, where S is a second positive integer;

traversing through the multiple sets of S control resources; and

mapping each set of S control resources to at least one tile determined by cycling through the L tiles.

24. The method of claim 20, further comprising:

mapping the control resource to multiple transmission units in at least one tile among the L tiles to obtain diversity of the control resource, the multiple transmission units comprising the transmission unit with the transmission unit index r in the tile with the tile index h.

25. The method of claim 20, further comprising:

assigning the plurality of control resources to a plurality of control channels one control channel at a time and in a particular order.

26. An apparatus for wireless communication, comprising:

means for receiving a control resource index R of a control resource;

means for calculating a tile index h and a transmission unit index r based on the control resource index R;

means for mapping the control resource to a transmission unit with the transmission unit index r in a tile with the tile index h, wherein the transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of a control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit, wherein the means for mapping the control resource is configured to;

allocate the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocate the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

27. The apparatus of claim 26, further comprising:

means for forming multiple sets of S control resources of the plurality of control resources, where S is a second positive integer; and

means for mapping each batch of L consecutive sets of S control resources to S transmission units at same location in the L tiles.

28. The apparatus of claim 26, further comprising:

means for forming multiple sets of S control resources of the plurality of control resources, where S is a second positive integer; and

means for mapping each set of S control resources to a cluster of S adjacent transmission units in each of at least one tile among the L tiles.

29. The apparatus of claim 26, further comprising:

means for forming multiple sets of S control resources of the plurality of control resources, where S is a second positive integer;

means for traversing through the multiple sets of S control resources; and

means for mapping each set of S control resources to at least one tile determined by cycling through the L tiles.

30. The apparatus of claim 26, further comprising:

means for mapping the control resource to multiple transmission units in at least one tile among the L tiles to obtain diversity of the control resource, the multiple transmission units comprising the transmission unit with the transmission unit index r in the tile with the tile index h.

31. The apparatus of claim 26, further comprising:

means for assigning the plurality of control resources to a plurality of control channels one control channel at a time and in a particular order.

32. A non-transitory computer-readable storage device storing instructions executable by a processor to perform operations comprising:

receiving a control resource index R of a control resource;

computing a tile index h and a transmission unit index r based on the control resource index R; and

mapping the control resource to a transmission unit with the transmission unit index r in a tile with the tile index h, wherein the transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of a control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit;

allocating the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocating the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

33. An apparatus for wireless communication, comprising:

a processor; and

a memory coupled to the processor, wherein the memory stores instructions executable by the processor to perform operations comprising;

receiving a control resource index R of a control resource;

calculating a tile index h and a transmission unit index r based on the control resource index R;

determining available transmission units of a particular control channel from among all transmission units of a control segment in the control channel by excluding particular transmission units that are used to transmit pilot channels and other control channels; and

mapping the control resource to a particular transmission unit of the available transmission units in a tile with the tile index h, wherein the particular transmission unit is assigned the transmission unit index r, wherein the particular transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of the control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit;

allocating the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocating the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

34. The apparatus of claim 33, wherein at least one tile of the L tiles has same pattern of unavailable transmission units.

35. The apparatus of claim 33, wherein the operations further comprise:

traversing through the plurality of transmission units in each tile; and

assigning each transmission unit of the plurality transmission units to one packet among multiple packets of the control channel, the one packet being determined by cycling through the multiple packets.

36. The apparatus of claim 33, wherein the operations further comprise:

determining transmission units in each tile to which the control resource is mapped.

37. The apparatus of claim 33, wherein the control segment comprises three tiles, wherein the tile with the tile index h is one of the three tiles.

38. A method for wireless communication, comprising:

receiving a control resource index R of a control resource;

calculating a tile index h and a transmission unit index r based on the control resource index R;

determining available transmission units of a particular control channel from among all transmission units of a control segment in the control channel by excluding particular transmission units that are used to transmit pilot channels and other control channels;

mapping the control resource to a particular transmission unit of the available transmission unit in a tile with the tile index h, wherein the transmission unit is assigned the transmission unit index r, wherein the particular transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of the control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit;

allocating the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocating the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

39. The method of claim 38, further comprising

traversing through the plurality of transmission units in each tile of the L tiles;

and

assigning each transmission unit of the plurality of transmission units to one packet among multiple packets of the control channel, the one packet being determined by cycling through the multiple packets.

40. The method of claim 38, further comprising

determining transmission units in each tile to which the control resource is mapped.

41. An apparatus for wireless communication, comprising:

means for receiving a control resource index R of a control resource;

means for calculating a tile index h and a transmission unit index r based on the control resource index R;

means for determining available transmission units of a particular control channel from among all transmission units of a control segment in the control channel by excluding particular transmission units that are used to transmit pilot channels and other control channels; and

means for mapping the control resource to a particular transmission unit of the available transmission unit in a tile with the tile index h, wherein the transmission unit is assigned the transmission unit index r, wherein the particular transmission unit corresponds to a particular hop-port, wherein the control resource is one of a plurality of control resources of the control segment, wherein the plurality of control resources includes a first control resource and a second control resource, wherein the control segment comprises L tiles, wherein L is a positive integer, and wherein each tile comprises a plurality of transmission units that includes a first transmission unit and a second transmission unit, wherein the means for mapping the control resource is configured to;

allocate the first control resource to a first control channel by mapping, according to a localized mapping scheme, the first control resource to the first transmission unit; and

allocate the second control resource to a second control channel by mapping, according to a mapping scheme other than the localized mapping scheme, the second control resource to the second transmission unit, wherein the first control resource is allocated to the first control channel prior to the second control resource being allocated to the second control channel.

42. The apparatus of claim 41, further comprising:

means for traversing through the plurality of transmission units in each tile of the L tiles; and

means for assigning each transmission unit of the plurality of transmission units to one packet among multiple packets of the control channel, the one packet being determined by cycling through the multiple packets.

43. The apparatus of claim 41, further comprising:

means for determining transmission units in each tile of the L tiles to which the control resource is mapped.