ADJUSTING MULTI-CARRIER ALLOCATION IN WIRELESS NETWORKS

• US 20090093255A1
• Filed: 10/02/2008
• Published: 04/09/2009
• Est. Priority Date: 10/05/2007
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Balasubramanian, Srinivasan
• Application Number:
  US12/244,196
• Publication Number:
  US 20090093255A1
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/34 Selective release of ongoing connections
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methodologies are described that facilitate adjusting allocation of carriers in wireless communications. A mobile device can establish communication with a base station over a number of allocated carriers for simultaneous transmission thereover. The mobile device can experience a decrease in power amplifier (PA) headroom causing dropping of at least one carrier and can report the drop to the base station. The base station can subsequently await a carrier request message from the mobile device before allocating additional carriers, or can allocate an additional carrier based on a determination that the mobile device can handle the new carrier. The mobile device can transmit a carrier request message when the PA headroom returns to a threshold level.

Claims

1. A method for modifying a number of carriers utilized in a wireless communication network, comprising:

establishing communications with an access point utilizing a plurality of carriers;

reporting dropping of one or more of the carriers as a result of a change in one or more communication parameters to the access point; and

receiving one or more additional carriers from the access point following a disparate change in the one or more communication parameters.

2. The method of claim 1, further comprising requesting the one or more additional carriers based at least in part on the disparate change.

3. The method of claim 2, further comprising setting a carrier request bar timer for prohibiting request of additional carriers based at least in part on detecting continuous requests for additional carriers and subsequent dropping of the requested carriers.

4. The method of claim 3, requesting the one or more carriers is further based at least in part on determining expiration of the carrier request bar timer.

5. The method of claim 2, requesting the one or more carriers is further based at least in part on performance over current carriers.

6. The method of claim 1, the one or more additional carriers received in an unsolicited traffic channel assignment from the access point.

7. The method of claim 1, further comprising receiving one or more disparate additional carriers from the access point following dropping the one or more additional carriers.

8. The method of claim 1, the one or more communication parameters includes a power amplifier (PA) headroom, the change is a decrease in the PA headroom, and the disparate change is an increase in the PA headroom.

9. The method of claim 1, the communications initialized over an evolution data optimized (EV-DO) network.

10. A wireless communications apparatus, comprising:

at least one processor configured to;

establish communications with an access point over a number of carriers assigned by the access point;

drop one or more of the carriers as a result of a change in one or more communications parameters; and

request one or more additional carriers based at least in part on a disparate change to the one or more communications parameters; and

a memory coupled to the at least one processor.

11. A wireless communications apparatus that facilitates adjusting a number of carriers utilized in wireless communications, comprising:

means for establishing communications with an access point utilizing a number of carriers;

means for indicating a decrease in a number of carriers utilized based at least in part on a change to a communication parameter; and

means for receiving one or more additional carriers based at least in part on a disparate change to the communication parameter.

12. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to establish communications with an access point utilizing a plurality of carriers;

code for causing the at least one computer to report dropping of one or more of the carriers as a result of a change in one or more communication parameters to the access point; and

code for causing the at least one computer to receive one or more additional carriers from the access point following a disparate change in the one or more communication parameters.

13. An apparatus, comprising:

a transceiver that facilitates establishing communications with an access point over a plurality of assigned carriers;

a carrier dropper that transmits an indication of one or more dropped carriers to the access point based at least in part on a change of a communications parameter; and

a carrier receiver that receives one or more additional carriers from the access point based at least in part on a disparate change to the communications parameter.

14. The apparatus of claim 13, further comprising a carrier requestor that requests the one or more additional carriers based at least in part on the disparate change.

15. The apparatus of claim 14, the carrier requestor determines an aggressive drop state based at least in part on repeated requests for additional carriers and subsequent dropping of the requested carriers.

16. The apparatus of claim 15, the carrier requestor further requests the one or more carriers based at least in part on the aggressive drop state.

17. The apparatus of claim 14, the carrier requestor further requests the one or more carriers based at least in part on performance over current carriers.

18. The apparatus of claim 13, the carrier receiver receives the one or more additional carriers in an unsolicited traffic channel assignment from the access point.

19. The apparatus of claim 13, the carrier receiver obtains one or more disparate additional carriers from the access point following dropping the one or more additional carriers.

20. The apparatus of claim 13, the one or more communication parameters includes a power amplifier (PA) headroom, the change is a decrease in the PA headroom, and the disparate change is an increase in the PA headroom.

21. A method that facilitates allocating carriers in wireless communication networks, comprising:

allocating a plurality of carriers to a mobile device according to a maximum number of allocable carriers associated with the mobile device;

receiving an indication of dropping one or more of the allocated carriers from the mobile device; and

allocating an additional carrier to the mobile device based at least in part on determining an availability in the mobile device for the additional carrier.

22. The method of claim 21, determining the availability is based at least in part on evaluating activity of a reverse link channel of the one or more allocated carriers.

23. The method of claim 21, determining the availability is based at least in part on receiving a request from the mobile device for the additional carrier.

24. The method of claim 21, allocating the additional carrier is further based at least in part on determining loading conditions for the additional carrier.

25. The method of claim 24, allocating the additional carrier is further based at least in part on comparing the loading conditions for the additional carrier to loading conditions for the allocated carrier for which the indication of dropping is received.

26. The method of claim 21, allocating the additional carrier is further based on determining drop characteristics of the mobile device related to previously requested additional carriers.

27. The method of claim 21, the plurality of carriers are allocated to the mobile device in an evolution data optimized (EV-DO) network.

28. A wireless communications apparatus, comprising:

at least one processor configured to;

allocate a plurality of carriers to a mobile device to facilitate communication therewith;

receive a notification of a drop in at least one of the carriers by the mobile device; and

allocate an additional carrier to the mobile device based at least in part on a subsequently received request for the additional carrier; and

a memory coupled to the at least one processor.

29. A wireless communications apparatus for adjusting carrier allocation of one or more mobile devices, comprising:

means for allocating a plurality of carriers to a mobile device to facilitate communication therewith;

means for receiving notification of a dropped carrier related to the mobile device; and

means for allocating an additional carrier to the mobile device based at least in part on a request from the mobile device for the additional carrier.

30. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to allocate a plurality of carriers to a mobile device according to a maximum number of allocable carriers associated with the mobile device;

code for causing the at least one computer to receive an indication of dropping one or more of the allocated carriers from the mobile device; and

code for causing the at least one computer to allocate an additional carrier to the mobile device based at least in part on determining an availability in the mobile device for the additional carrier.

31. An apparatus, comprising:

a transceiver that communicates with one or more mobile devices over a plurality of allocated carriers;

a drop carrier notification receiver that receivers an indication that the mobile device has dropped one or more of the allocated carriers; and

a carrier allocator that allocates an additional carrier to the mobile device based at least in part on determining availability in the mobile device for the additional carrier.

32. The apparatus of claim 31, determining the availability is based at least in part on evaluating activity of a reverse link channel of the one or more allocated carriers.

33. The apparatus of claim 31, determining the availability is based at least in part on receiving a request from the mobile device for the additional carrier.

34. The apparatus of claim 31, the carrier allocator allocates the additional carrier further based at least in part on determining loading conditions for the additional carrier.

35. The apparatus of claim 34, the carrier allocator allocates the additional carrier further based at least in part on comparing the loading conditions for the additional carrier to loading conditions for the dropped allocated carrier.

36. The apparatus of claim 31, the carrier allocator allocates the additional carrier further based on determining drop characteristics of the mobile device related to previously requested additional carriers.