Inter-cell interference mitigation for traffic according to priority

• US 10,469,218 B2
• Filed: 05/24/2016
• Issued: 11/05/2019
• Est. Priority Date: 05/24/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Li, Chong, Wang, Hua, Li, Junyi
• Primary Examiner(s): Choudhry, Samina F
• Application Number:
  US15/163,423
• Publication Number:
  US 20170346609A1
• Time in Patent Office: 1,260 Days
• Field of Search: 370329
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Traffic in a first cell may experience interference from or may cause interference to traffic in an adjacent cell, which may lead to undesirable performance in one or both of the first cell and the adjacent cell. For example, a user equipment (UE) near an edge of the first cell may experience appreciable interference based on the reuse of resources. Accordingly, for transmissions in adjacent cells over a same band or sub-band, one UE may need to reduce transmit power in order to yield to another UE in an adjacent cells. An apparatus may be configured to determine first traffic associated with a first priority and second traffic associated with a second priority. The apparatus may be further configured to assign, based on the first priority and second priority, a first set of resources to the first traffic and a second set of resources to the second traffic.

Claims

1. A method of wireless communication of a base station, the method comprising:

determining, for a first cell, a first traffic associated with a first priority;

determining, for the first cell, a second traffic associated with a second priority, the second priority lower than the first priority;

dividing a wideband spectrum into a plurality of sub-bands, wherein the first traffic is assigned to a first set of resources on a first sub-band based on the first and second priority, the second traffic is assigned to a second set of resources on a second sub-band based on the first and second priority, and a third traffic is assigned to a third set of resources of a third sub-band of a second cell that does not overlap with the first sub-band and at least partially overlaps with the second sub-band;

wherein the first set of resources in the first cell and the third set of resources of the second cell do not overlap and the third set of resources are assigned to a third priority of third traffic in the second cell that is relatively higher than the second priority;

communicating, in the first cell, with a first device on the first set of resources, the first device associated with the first traffic; and

sending, to a second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources.

2. The method of wireless communication of claim 1 further comprising,

communicating with a neighboring base station to negotiate the first set of resources and the second set of resources of the first cell and the third set of resources of the second cell.

3. The method of claim 2, wherein the first set of resources of the first cell and a fourth set of resources of the second cell, include one or more of the same resources, the fourth set of resources assigned to a fourth traffic associated with a fourth priority that is lower than the first priority.

4. The method of claim 2, wherein the second set of resources of the first cell and the third set of resources of the second cell include one or more of the same resources.

5. The method of claim 4, wherein the sending, to the second device associated with the second traffic, the instruction to cause the second device to reduce the transmission power of the second device when the second device is transmitting on the second set of resources comprises:

instructing the second device associated with the second traffic in the first cell to yield to the third traffic in the second cell.

6. The method of claim 4, wherein the sending, to the second device associated with the second traffic, the instruction to cause the second device to reduce the transmission power of the second device when the second device is transmitting on the second set of resources is based on the third traffic associated with the third priority in the second cell.

7. The method of claim 4, wherein the sending, to the second device associated with the second traffic, the instruction to cause the second device to reduce the transmission power of the second device when the second device is transmitting on the second set of resources comprises:

muting the second device associated with the second traffic in the first cell.

8. An apparatus for wireless communication, comprising:

means for determining, for a first cell, a first traffic associated with a first priority;

means for determining, for the first cell, a second traffic associated with a second priority, the second priority lower than the first priority;

means for dividing a wideband spectrum into a plurality of sub-bands, wherein the first traffic is assigned to a first set of resources on a first sub-band based on the first and second priority, the second traffic is assigned to a second set of resources on a second sub-band based on the first and second priority, and the third traffic is assigned to a third set of resources on a third sub-band associated with a second cell that does not overlap with the first sub-band and at least partially overlaps with the second sub-band

wherein the first set of resources in the first cell and the third set of resources of the second cell do not overlap and the third set of resources are assigned to a third priority of third traffic in the second cell that is relatively higher than the second priority;

means for communicating, in the first cell, with a first device on the first set of resources, the first device associated with the first traffic; and

means for sending, to a second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources.

9. The apparatus of wireless communication of claim 8 further comprising,

means for negotiating the first set of resources and the second set of resources of the first cell and the third set of resources of the second cell, with a neighboring base station.

10. The apparatus of claim 9, wherein the first set of resources of the first cell and a fourth set of resources of the second cell, include one or more of the same resources, the fourth set of resources assigned to a fourth traffic associated with a fourth priority that is lower than the first priority.

11. The apparatus of claim 9, wherein the second set of resources of the first cell and the third set of resources of the second cell include one or more of the same resources.

12. The apparatus of claim 11, wherein the means for sending, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources is configured to instruct the second device associated with the second traffic in the first cell to yield to the third traffic in the second cell.

13. The apparatus of claim 11, wherein the means for sending, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources is configured to instruct the second device associated with the second traffic in the first cell to reduce the transmission power based on the third traffic associated with the third priority in the second cell.

14. The apparatus of claim 11, wherein the means for sending, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources is configured to mute the second device associated with the second traffic in the first cell.

15. An apparatus for wireless communication, the apparatus comprising:

a memory; and

at least one processor coupled to the memory and configured to;

determine, for a first cell, a first traffic associated with a first priority;

determine, for the first cell, a second traffic associated with a second priority, the second priority lower than the first priority;

divide a wideband spectrum into a plurality of sub-bands, wherein the first traffic is assigned to a first set of resources on a first sub-band based on the first and second priority, the second traffic is assigned to a second set of resource on a second sub-band based on the first and second priority, and a third traffic is assigned to a third set of resources of a third sub-band of a second cell that does not overlap with the first sub-band and at least partially overlaps with the second sub-band;

assign, based on the first priority and the second priority, a first set of resources to the first traffic and a second set of resources to the second traffic, wherein the first set of resources in the first cell and the third set of resources of the second cell do not overlap and the third set of resources are assigned to a third priority of third traffic in the second cell that is relatively higher than the second priority;

communicate, in the first cell, with a first device on the first set of resources, the first device associated with the first traffic; and

send, to a second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources.

16. The apparatus of claim 15, wherein the at least one processor is configured to to negotiate the first set of resources and the second set of resources of the first cell and the third set of resources of the second cell with a neighboring base station.

17. The apparatus of claim 16, wherein the first set of resources of the first cell and a fourth set of resources of the second cell, include one or more of the same resources, the fourth set of resources assigned to a fourth traffic associated with a fourth priority that is lower than the first priority.

18. The apparatus of claim 16, wherein the second set of resources of the first cell and the third set of resources of the second cell include one or more of the same resources.

19. The apparatus of claim 18, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to instruct the second device associated with the second traffic in the first cell to yield to the third traffic in the second cell.

20. The apparatus of claim 18, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to instruct the second device associated with the second traffic in the first cell to reduce the transmission power based on the third traffic associated with the third priority in the second cell.

21. The apparatus of claim 18, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to mute the second device associated with the second traffic in the first cell.

22. A non-transitory, computer-readable medium storing computer-executable code for wireless communication, comprising code to:

determine, for a first cell, a first traffic associated with a first priority;

determine, for the first cell, a second traffic associated with a second priority, the second priority lower than the first priority;

divide a wideband spectrum into a plurality of sub-bands, wherein the first traffic is assigned to a first set of resources on a first sub-band based on the first and second priority, the second traffic is assigned to a second set of resource on a second sub-band based on the first and second priority, and a third traffic is assigned to a third set of resources of a third sub-band of a second cell that does not overlap with the first sub-band and at least partially overlaps with the second sub-band;

assign, based on the first priority and the second priority, a first set of resources to the first traffic and a second set of resources to the second traffic, wherein the first set of resources in the first cell and the third set of resources of the second cell do not overlap and the third set of resources are assigned to a third priority of third traffic in the second cell that is relatively higher than the second priority;

communicate, in the first cell, with a first device on the first set of resources, the first device associated with the first traffic; and

send, to a second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources.

23. The non-transitory, computer-readable medium of claim 22, wherein the code includes code to negotiate the first set of resources and the second set of resources of the first cell and the third set of resources of the second cell with a neighboring base station.

24. The non-transitory, computer-readable medium of claim 23, wherein the first set of resources of the first cell and fourth set of resources of the second cell, include one or more of the same resources, the fourth set of resources assigned to a fourth traffic associated with a fourth priority that is lower than the first priority.

25. The non-transitory, computer-readable medium of claim 23, wherein the second set of resources of the first cell and the third set of resources of the second cell include one or more of the same resources.

26. The non-transitory, computer-readable medium of claim 23, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to instruct the second device associated with the second traffic in the first cell to yield to the third traffic in the second cell.

27. The non-transitory, computer-readable medium of claim 23, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to instruct the second device associated with the second traffic in the first cell to reduce the transmission power based on the third traffic associated with the third priority in the second cell.

28. The non-transitory, computer-readable medium of claim 23, wherein to send, to the second device associated with the second traffic, an instruction to cause the second device to reduce transmission power of the second device when the second device is transmitting on the second set of resources comprises to mute the second device associated with the second traffic in the first cell.