CONTROL RESOURCE MAPPING FOR A WIRELESS COMMUNICATION SYSTEM

• US 20080167040A1
• Filed: 01/02/2008
• Published: 07/10/2008
• Est. Priority Date: 01/04/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gorokhov, Alexei, Bhushan, Naga, Palanki, Ravi, Sarkar, Sandip, Khandekar, Aamod
• Granted Patent: US 8,681,749 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• 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:

at least one processor configured to determine a tile index h and a transmission unit index r for a control resource index R, and to map a control resource with index R to a transmission unit with index r in a tile with index h, the control resource being one of a plurality of control resources for a control segment comprising L tiles, where L is one or greater, and each tile comprising a plurality of transmission units; and

a memory coupled to the at least one processor.

2. The apparatus of claim 1, wherein the at least one processor is configured to determine the tile index h and the transmission unit index r for the control resource index R 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 at least one processor is configured to form multiple sets of S control resources for the plurality of control resources, where S is one or greater, and to map 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 at least one processor is configured to form multiple sets of S control resources for the plurality of control resources, where S is greater than one, and to map 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 4, wherein the at least one processor is configured to traverse through the multiple sets of S control resources, and to map each set of S control resources to at least one tile determined by cycling through the L tiles.

6. The apparatus of claim 1, wherein the at least one processor is configured to form multiple sets of four control resources for the plurality of control resources, and to map 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 at least one processor is configured to traverse through the plurality of control resources, and to map each control resource to at least one tile determined by cycling through the L tiles.

8. The apparatus of claim 1, wherein the at least one processor is configured to map the control resource with index R to multiple transmission units in at least one tile among the L tiles to obtain diversity for the control resource, the multiple transmission units comprising the transmission unit with index r in the tile with index h.

9. The apparatus of claim 8, wherein the at least one processor is configured to map the control resource with index R to the multiple transmission units in different locations of the at least one tile.

10. The apparatus of claim 1, wherein the at least one processor is configured to map the control resource with index R to three transmission units in at least one tile among the L tiles to obtain third order diversity for the control resource, the three transmission units comprising the transmission unit with index r in the tile with index h.

11. The apparatus of claim 10, wherein the at least one processor is configured to determine indices of the three transmission units in the at least one tile 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 at least one processor is configured to map the control resource with index R to one transmission unit in each of the multiple tile segments for 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 at least one processor is configured to map the control resource with index R to multiple transmission units with different indices in at least one tile among the L tiles, and to determine the indices of the multiple transmission units 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 greater than one and determined based on the number of transmission units available for use in each tile and the number of transmission units to which the control resource is mapped.

17. The apparatus of claim 1, wherein the at least one processor is configured to send control information via the control resource to at least one terminal.

18. The apparatus of claim 1, wherein the at least one processor is configured to receive control information via the control resource from a base station.

19. The apparatus of claim 1, wherein the at least one processor is configured to assign the plurality of control resources to a plurality of control channels, one control channel at a time and in a predetermined order.

20. A method for wireless communication, comprising:

determining a tile index h and a transmission unit index r for a control resource index R; and

mapping a control resource with index R to a transmission unit with index r in a tile with index h, the control resource being one of a plurality of control resources for a control segment comprising L tiles, where L is one or greater, and each tile comprising a plurality of transmission units.

21. The method of claim 20, further comprising:

forming multiple sets of S control resources for the plurality of control resources, where S is one or greater; and

mapping each batch of L consecutive sets of S control resources to S transmission units at 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 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.

23. The method of claim 20, further comprising:

forming multiple sets of S control resources for the plurality of control resources, where S is one or greater;

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 with index R to multiple transmission units in at least one tile among the L tiles to obtain diversity for the control resource, the multiple transmission units comprising the transmission unit with index r in the tile with 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 predetermined order.

26. An apparatus for wireless communication, comprising:

means for determining a tile index h and a transmission unit index r for a control resource index R; and

means for mapping a control resource with index R to a transmission unit with index r in a tile with index h, the control resource being one of a plurality of control resources for a control segment comprising L tiles, where L is one or greater, and each tile comprising a plurality of transmission units.

27. The apparatus of claim 26, further comprising:

means for forming multiple sets of S control resources for the plurality of control resources, where S is one or greater; 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 for the plurality of control resources, where S is greater than one; 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 for the plurality of control resources, where S is one or greater;

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 with index R to multiple transmission units in at least one tile among the L tiles to obtain diversity for the control resource, the multiple transmission units comprising the transmission unit with index r in the tile with 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 predetermined order.

32. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to determine a tile index h and a transmission unit index r for a control resource index R; and

code for causing the at least one computer to map a control resource with index R to a transmission unit with index r in a tile with index h, the control resource being one of a plurality of control resources for a control segment comprising L tiles, where L is one or greater, and each tile comprising a plurality of transmission units.

33. An apparatus for wireless communication, comprising:

at least one processor configured to determine transmission units available for a control channel from among all transmission units for a control segment in which the control channel is sent and excluding transmission units unavailable for the control channel, to determine a set of transmission units for a packet from among the transmission units available for the control channel, and to send or receive the packet via the set of transmission units; and

a memory coupled to the at least one processor.

34. The apparatus of claim 33, wherein the set of transmission units for the packet is distributed across the transmission units available for the control channel.

35. The apparatus of claim 33, wherein the transmission units unavailable for the control channel comprise transmission units used for pilot, other control channels, other transmissions, or a combination thereof.

36. The apparatus of claim 33, wherein the control segment comprises at least one tile, each tile comprising a plurality of transmission units.

37. The apparatus of claim 36, wherein the at least one tile has same pattern of unavailable transmission units.

38. The apparatus of claim 36, wherein the at least one processor is configured to traverse through the plurality of transmission units in each tile, and to assign each transmission unit to one packet among multiple packets for the control channel, the one packet being determined by cycling through the multiple packets.

39. The apparatus of claim 36, wherein the at least one processor is configured to determine transmission units in each tile to which the packet is mapped, and to determine the set of transmission units for the packet from among the transmission units in the at least one tile to which the packet is mapped and excluding the transmission units unavailable for the control channel.

40. The apparatus of claim 33, wherein the control segment comprises a plurality of tiles, each tile comprising a plurality of transmission units, and wherein the set of transmission units for the packet is in a subset of the plurality of tiles.

41. The apparatus of claim 33, wherein the control segment comprises three tiles for each of at least one segment, each tile comprising a plurality of transmission units, and wherein the set of transmission units for the packet is in three tiles for one segment.

42. A method for wireless communication, comprising:

determining transmission units available for a control channel from among all transmission units for a control segment in which the control channel is sent and excluding transmission units unavailable for the control channel;

determining a set of transmission units for a packet from among the transmission units available for the control channel; and

sending or receiving the packet via the set of transmission units.

43. The method of claim 42, wherein the control segment comprises at least one tile, each tile comprising a plurality of transmission units, and wherein the method further comprises:

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

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

44. The method of claim 42, wherein the control segment comprises at least one tile, each tile comprising a plurality of transmission units, and wherein the method further comprises:

determining transmission units in each tile to which the packet is mapped; and

determining the set of transmission units for the packet from among the transmission units in the at least one tile to which the packet is mapped and excluding the transmission units unavailable for the control channel.

45. An apparatus for wireless communication, comprising:

means for determining transmission units available for a control channel from among all transmission units for a control segment in which the control channel is sent and excluding transmission units unavailable for the control channel;

means for determining a set of transmission units for a packet from among the transmission units available for the control channel; and

means for sending or receiving the packet via the set of transmission units.

46. The apparatus of claim 45, wherein the control segment comprises at least one tile, each tile comprising a plurality of transmission units, and wherein the apparatus further comprises:

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

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

47. The apparatus of claim 45, wherein the control segment comprises at least one tile, each tile comprising a plurality of transmission units, and wherein the apparatus further comprises:

means for determining transmission units in each tile to which the packet is mapped; and

means for determining the set of transmission units for the packet from among the transmission units in the at least one tile to which the packet is mapped and excluding the transmission units unavailable for the control channel.