Control resource mapping for a wireless communication system

• US 8,693,444 B2
• Filed: 05/07/2012
• Issued: 04/08/2014
• 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:
  US13/465,943
• Publication Number:
  US 20120218943A1
• Time in Patent Office: 701 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;

determining available transmission units for use by a control channel from among transmission units associated with a control segment during which the control channel is sent, wherein the control segment includes a plurality of tiles;

forming L sets of S control resources of a plurality of control resources, wherein L is a first positive integer equal to one or greater, and wherein S is a second positive integer, wherein the plurality of control resources includes a first control resource and a second control resource;

determining a set of transmission units from among the available transmission units, wherein each transmission unit in the set of transmission units corresponds to a distinct hop-port, wherein the set of transmission units includes a first transmission unit and a second transmission unit;

mapping, during the control segment, each set of the L sets of S control resources to the set of transmission units across the plurality of tiles based on a transmission unit index h, wherein the transmission unit index h is computed based on a control resource index R;

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 set of transmission units is distributed across the available transmission units.

3. The apparatus of claim 1, wherein the available transmission units are determined by excluding particular transmission units used for other transmissions.

4. The apparatus of claim 1, wherein each of the plurality of tiles comprises a plurality of available transmission units.

5. The apparatus of claim 4, wherein at least one tile of the plurality of tiles has a repeating pattern of unavailable transmission units.

6. The apparatus of claim 5, wherein the operations further comprise:

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

7. The apparatus of claim 1, wherein the set of transmission units is distributed across a subset of the plurality of tiles.

8. The apparatus of claim 1, wherein the control segment comprises three tiles, and wherein the set of transmission units is distributed across the three tiles.

9. A method for wireless communication, comprising:

determining available transmission units for use by a control channel from among transmission units associated with a control segment during which the control channel is sent, wherein the control segment includes a plurality of tiles;

forming L sets of S control resources of a plurality of control resources, wherein L is a first positive integer, and wherein S is a second positive integer, wherein the plurality of control resources includes a first control resource and a second control resource;

determining a set of transmission units from among the available transmission units, wherein each transmission unit in the set of transmission units corresponds to a distinct hop-port, wherein the set of transmission units includes a first transmission unit and a second transmission unit;

mapping, during the control segment, each set of the L sets of S control resources to the set of transmission units across the plurality of tiles based on a transmission unit index h, wherein the transmission unit index h is computed based on a control resource index R;

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.

10. The method of claim 9, wherein each tile of the plurality of tiles comprises a plurality of available transmission units, and wherein the method further comprises:

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

11. The method of claim 9, wherein the set of transmission units is distributed across the available transmission units.

12. An apparatus for wireless communication, comprising:

means for determining available transmission units for use by a control channel from among transmission units associated with a control segment during which the control channel is sent, wherein the control segment includes a plurality of tiles;

means for forming L sets of S control resources of a plurality of control resources, wherein L is a first positive integer, and wherein S is a second positive integer, wherein the plurality of control resources includes a first control resource and a second control resource;

means for determining a set of transmission units from among the available transmission units, wherein each transmission unit in the set of transmission units corresponds to a distinct hop-port, wherein the set of transmission units includes a first transmission unit and a second transmission unit;

means for mapping, during the control segment, each set of the L sets of S control resources to the set of transmission units across the plurality of tiles based on a transmission unit index h, wherein the transmission unit index h is computed based on a control resource index R, wherein the means for forming the L sets of S control resources 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.

13. The apparatus of claim 12, wherein each tile of the plurality of tiles comprises a plurality of available transmission units, and wherein the apparatus further comprises:

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

14. The apparatus of claim 12, wherein the set of transmission units is distributed across the available transmission units.

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

determining available transmission units for use by a control channel from among transmission units associated with a control segment during which the control channel is sent, wherein the control segment includes a plurality of tiles;

forming L sets of S control resources of a plurality of control resources, wherein L is a first positive integer, and wherein S is a second positive integer, wherein the plurality of control resources includes a first control resource and a second control resource;

determining a set of transmission units from among the available transmission units, wherein each transmission unit in the set of transmission units corresponds to a distinct hop-port, wherein the set of transmission units includes a first transmission unit and a second transmission unit;

mapping, during the control segment, each set of the L sets of S control resources to the set of transmission units across the plurality of tiles based on a transmission unit index h, wherein the transmission unit index h is computed based on a control resource index R;

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.

16. The non-transitory computer-readable storage device of claim 15, wherein each tile of the plurality of tiles comprises a plurality of available transmission units, and wherein the operations further comprise:

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

17. The non-transitory computer-readable storage device of claim 15, wherein the set of transmission units is distributed across the available transmission units.

18. The non-transitory computer-readable storage device of claim 15, wherein the available transmission units are determined by excluding particular transmission units used for other transmissions.

19. The non-transitory computer-readable storage device of claim 15, wherein each of the plurality of tiles comprises a plurality of available transmission units.

20. The non-transitory computer-readable storage device of claim 15, wherein at least one tile of the plurality of tiles has a repeating pattern of unavailable transmission units.