Method and apparatus for conveying resource assignment for multiple system bandwidths

Patent metadata

Field	Value
Publication number	US-9949261-B2
Application number	US-90492810-A
Country	US
Kind code	B2
Filing date	Oct 14, 2010
Priority date	Oct 15, 2009
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

Techniques for supporting communication with user equipment (UEs) of different types on a plurality of system bandwidths are described. UEs of each type may operate on one or more available system bandwidths. Resources assigned to a UE may be conveyed by a resource allocation field of a control message sent to the UE. The resource allocation field may have different configurations (e.g., different sizes and/or interpretations) for different system bandwidths. In one design, the resource allocation field and the control message sent to the UE have different sizes for the plurality of system bandwidths. A base station may determine the size of the resource allocation field based on a system bandwidth selected for the UE. In another design, the resource allocation field may have a same size but different interpretations (e.g., different resource mappings) for the plurality of system bandwidths.

First claim

What is claimed is:

1. A method for wireless communication, comprising:
generating a control message for a user equipment (UE);
setting a resource allocation field of the control message based on a system bandwidth selected for the UE from among a plurality of system bandwidths, the resource allocation field comprising an indication of resources assigned to the UE for the selected system bandwidth;
sending the control message to the UE; and
communicating with the UE on the resources assigned to the UE,
wherein the plurality of system bandwidths is associated with a same size but different interpretations of the resource allocation field for a particular format of the control message.

2. The method of claim 1 , wherein the plurality of system bandwidths comprises a first system bandwidth and a second system bandwidth, the second system bandwidth comprising at least part of the first system bandwidth and an additional bandwidth.

3. The method of claim 2 , wherein the sending the control message comprises sending the control message within the first system bandwidth regardless of whether the assigned resources are for the first system bandwidth or the second system bandwidth.

4. The method of claim 1 , wherein the plurality of system bandwidths is associated with different resource mappings for the resource allocation field, the resource mapping for each system bandwidth defining different assigned resources for a plurality of settings of the resource allocation field.

5. The method of claim 1 , wherein the generating the control message comprises generating the control message based on a downlink control information (DCI) format selected from a set of DCI formats.

6. The method of claim 5 , wherein each system bandwidth is associated with a set of DCI formats, and wherein the plurality of system bandwidths is associated with at least two different sets of DCI formats.

7. The method of claim 1 , further comprising configuring the UE to operate on the selected system bandwidth.

8. The method of claim 1 , wherein the assigned resources are for data transmission on downlink, and wherein the communicating with the UE comprises sending a data transmission to the UE on the assigned resources.

9. The method of claim 1 , wherein the assigned resources are for data transmission on uplink, and wherein the communicating with the UE comprises receiving a data transmission sent on the assigned resources by the UE.

10. A method for wireless communication, comprising:
generating a control message for a user equipment (UE);
setting a resource allocation field of the control message based on a system bandwidth selected for the UE from among a plurality of system bandwidths, the resource allocation field comprising an indication of resources assigned to the UE for the selected system, wherein the setting the resource allocation field comprises setting the resource allocation field based on a type of subframe in which the control message is sent, and wherein a plurality of types of subframe is associated with at least two different configurations of the resource allocation field, and wherein a type of subframe refers to a way in which the subframe is scheduled among different types of UEs;
sending the control message to the UE; and
communicating with the UE on the resources assigned to the UE.

11. The method of claim 1 , wherein the plurality of system bandwidths corresponds to different frequency ranges of a single carrier.

12. The method of claim 10 , wherein the plurality of system bandwidths is associated with at least two different configurations of the resource allocation field for a particular format of the control message.

13. The method of claim 10 , wherein the plurality of system bandwidths is associated with different sizes of the resource allocation field for a particular format of the control message.

14. The method of claim 10 , further comprising determining a size of the resource allocation field based on the selected system bandwidth.

15. The method of claim 10 , wherein the plurality of system bandwidths comprises a first system bandwidth and a second system bandwidth, the second system bandwidth comprising at least part of the first system bandwidth and an additional bandwidth, and wherein the setting the resource allocation field comprises:
setting a first size of the resource allocation field if the assigned resources are for the first system bandwidth, the first size being determined based on the first system bandwidth, and
setting a second size of the resource allocation field if the assigned resources are for the second system bandwidth, the second size being determined based on the second system bandwidth.

16. The method of claim 10 , wherein the plurality of system bandwidths comprises a first system bandwidth and a second system bandwidth, the second system bandwidth comprising at least part of the first system bandwidth and an additional bandwidth, and wherein the setting the resource allocation field comprises:
setting the resource allocation field based on a first resource mapping if the assigned resources are for the first system bandwidth, the first resource mapping defining different assigned resources in the first system bandwidth for a first plurality of settings of the resource allocation field, and
setting the resource allocation field based on a second resource mapping if the assigned resources are for the second system bandwidth, the second resource mapping defining different assigned resources in the second system bandwidth for a second plurality of settings of the resource allocation field.

17. The method of claim 10 , wherein the plurality of system bandwidths comprises a first system bandwidth and a second system bandwidth, the second system bandwidth comprising at least part of the first system bandwidth and an additional bandwidth, and wherein the setting the resource allocation field comprises:
setting the resource allocation field based on the first system bandwidth if the control message is sent in a common search space for a plurality of UEs, and
setting the resource allocation field based on the second system bandwidth if the control message is sent in a UE-specific search space for the UE.

18. The method of claim 10 , wherein the plurality of system bandwidths comprises a first system bandwidth and a second system bandwidth, the second system bandwidth comprising at least part of the first system bandwidth and an additional bandwidth, and wherein the setting the resource allocation field comprises:
setting the resource allocation field based on the first system bandwidth if the control message is sent as a broadcast message to a plurality of UEs, and
setting the resource allocation field based on the second system bandwidth if the control message is sent as a unicast message to the UE.

19. The method of claim 10 , wherein the generating the control message comprises generating the control message based on a downlink control information (DCI) format selected from a set of DCI formats, the method further comprising:
determining whether the selected DCI format is associated with a common configuration of the resource allocation field for the plurality of system bandwidths or different configurations of the resource allocation field for the plurality of system bandwidths.

20. The method of claim 10 , wherein the setting the resource allocation field comprises setting the resource allocation field based on a resource allocation type for the resources assigned to the UE, and whe

Assignees

• Chen Wanshi
• Montojo Juan
• Qualcomm Inc

Inventors

• Chen Wanshi
• Montojo Juan

Classifications

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title