RADIO BEARER MANAGEMENT AT A DONOR BASE STATION IN A WIRELESS NETWORK WITH RELAYS

• US 20110235569A1
• Filed: 03/24/2011
• Published: 09/29/2011
• Est. Priority Date: 03/26/2010
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ULUPINAR, FATIH, HUANG, XIAOLONG
• Application Number:
  US13/071,250
• Publication Number:
  US 20110235569A1
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

Certain aspects of the present disclosure provide techniques and apparatuses for managing radio bearers during traffic congestion in a wireless communications networks having relays. According to certain aspects, a donor base station may detect traffic congestion on a Un radio bearer configured to interface between the relay node and the donor base station, where the Un radio bearer carries a plurality of Uu bears configured to interface between the relay node and at least one user equipment (UE). According to certain aspects, the donor base station may take one or more actions to trigger removal of at least one of the Uu bearers carried on the Un bearer.

Claims

1. A method for operating a donor base station having a first plurality of radio bearers (RBs) that interface with a relay node, the method comprising:

determining traffic congestion on the first plurality of RBs; and

taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).

2. The method of claim 1, wherein taking one or more actions comprises:

selecting at least one of the second plurality of RBs based on an indication of an allocation and retention priority (ARP) of each of second plurality of RBs; and

generating an indication to a mobility management entity (MME) to trigger removal of the selected RB.

3. The method of claim 1, wherein taking one or more actions comprises:

modifying a quality of service (QoS) associated with the first plurality of RBs based on the traffic congestion.

4. The method of claim 3, wherein the QoS is modified such that the relay node, responsive to the modified QoS, selects at least one of the second plurality of RBs for removal, and generates an indication of bearer release of the selected RB for a mobility management entity (MME) associated with a UE associated with the selected RB.

5. The method of claim 1, wherein the taking one or more actions comprises:

selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generating an indication, to a mobility management entity (MME) associated with a UE associated with the selected RB, of bearer release of the selected RB.

6. The method of claim 1, wherein the taking one or more actions comprise:

selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generating an indication, to a mobility management entity (MME), to request UE context release of a UE associated with the selected RB.

7. A donor base station having a first plurality of radio bearers (RBs) that interface with a relay node, the donor base station comprising:

a traffic monitor component configured to determine traffic congestion on the first plurality of RBs; and

a radio bearer manager component configured to take one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).

8. The donor base station of claim 7, wherein the radio bearer manager component is further configured to:

select at least one of the second plurality of RBs based on an indication of an allocation and retention priority (ARP) of each of second plurality of RBs; and

generate an indication to a mobility management entity (MME) to trigger removal of the selected RB.

9. The donor base station of claim 7, further comprising:

a gateway component configured to modify a quality of service (QoS) associated with the first plurality of RBs based on the traffic congestion.

10. The donor base station of claim 9, wherein the gateway component is configured to modify the QoS such that the relay node, responsive to the modified QoS, selects at least one of the second plurality of RBs for removal, and generates an indication of bearer release of the selected RB for a mobility management entity (MME) associated with a UE associated with the selected RB.

11. The donor base station of claim 7, wherein the radio bearer manager component is further configured to:

select at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generate an indication, to a mobility management entity (MME) associated with a UE associated with the selected RB, of bearer release of the selected RB.

12. The donor base station of claim 7, wherein the radio bearer manager component is further configured to:

select at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generate an indication, to a mobility management entity (MME), to request UE context release of a UE associated with the selected RB.

13. An apparatus for wireless communications having a first plurality of radio bearers (RBs) that interface with a relay node, comprising:

means for determining traffic congestion on the first plurality of RBs; and

means for taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).

14. The apparatus of claim 13, wherein the means for taking one or more actions comprises:

means for selecting at least one of the second plurality of RBs based on an indication of an allocation and retention priority (ARP) of each of second plurality of RBs; and

means for generating an indication to a mobility management entity (MME) to trigger removal of the selected RB.

15. The apparatus of claim 13, wherein the means for taking one or more actions comprises:

means for modifying a quality of service (QoS) associated with the first plurality of RBs based on the traffic congestion.

16. The apparatus of claim 15, wherein the QoS is modified such that the relay node, responsive to the modified QoS, selects at least one of the second plurality of RBs for removal, and generates an indication of bearer release of the selected RB for a mobility management entity (MME) associated with a UE associated with the selected RB.

17. The apparatus of claim 13, wherein the means for taking one or more actions comprises:

means for selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

means for generating an indication, to a mobility management entity (MME) associated with a UE associated with the selected RB, of bearer release of the selected RB.

18. The apparatus of claim 13, wherein the means for taking one or more actions comprise:

means for selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

means for generating an indication, to a mobility management entity (MME), to request UE context release of a UE associated with the selected RB.

19. A computer program product comprising a computer readable medium having instructions for operating a donor base station having a first plurality of radio bearers (RBs) that interface with a relay node stored thereon, the instructions executable by one or more processors for:

determining traffic congestion on the first plurality of RBs; and

taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).

20. The computer program product of claim 19, wherein the instructions for taking one or more actions comprises instructions for:

selecting at least one of the second plurality of RBs based on an indication of an allocation and retention priority (ARP) of each of second plurality of RBs; and

generating an indication to a mobility management entity (MME) to trigger removal of the selected RB.

21. The computer program product of claim 19, wherein the instructions for taking one or more actions comprises instructions for:

modifying a quality of service (QoS) associated with the first plurality of RBs based on the traffic congestion.

22. The computer program product of claim 21, wherein the QoS is modified such that the relay node, responsive to the modified QoS, selects at least one of the second plurality of RBs for removal, and generates an indication of bearer release of the selected RB for a mobility management entity (MME) associated with a UE associated with the selected RB.

23. The computer program product of claim 19, wherein the instructions for taking one or more actions comprises instructions for:

selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generating an indication, to a mobility management entity (MME) associated with a UE associated with the selected RB, of bearer release of the selected RB.

24. The computer program product of claim 19, wherein the instructions for taking one or more actions comprises instructions for:

selecting at least one of the second plurality of RBs to deactivate based on the traffic congestion; and

generating an indication, to a mobility management entity (MME), to request UE context release of a UE associated with the selected RB.