Method and apparatus for managing imbalance in a communication system

• US 7,813,740 B2
• Filed: 10/15/2002
• Issued: 10/12/2010
• Est. Priority Date: 10/15/2001
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lundby, Stein A., Tiedemann, Edward G. Jr., Wei, Yongbin, Chen, Tao
• Primary Examiner(s): Gesesse; Tilahun
• Application Number:
  US10/272,135
• Publication Number:
  US 20030072294A1
• Time in Patent Office: 2,919 Days
• Field of Search: 455/453, 455/522, 455/69, 455/127.1, 455/437, 455/439, 455/442, 455/436, 455/438, 455/524, 455/525, 455/444, 370/345
• US Class Current: 455/453
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Method and apparatus for managing imbalance in a wireless communication system, thus reducing the impact of unreliable reverse link on the wireless communication system'"'"'s stability, capacity, and data traffic throughput are disclosed.

Claims

1. A method for managing imbalance in a wireless communication system, comprising:

receiving and recovering reverse link information in at least one non-serving sector to form a non-serving sector reverse link quality metric for comparison with a serving sector reverse link quality metric; and

mitigating imbalance at a controller between quality metrics of forward and reverse links in a serving sector utilizing said non-serving sector reverse link quality metric determined from said reverse link information received and recovered over a reverse link at said at least one non-serving sector.

2. The method as claimed in claim 1 wherein said mitigating imbalance utilizing said received reverse link information comprises:

relaying said recovered reverse link information to a control entity.

3. The method as claimed in claim 1 wherein said mitigating imbalance utilizing said received reverse link information, comprises:

relaying indication of successful recovering to a control entity.

4. The method as claimed in claim 3 further comprising:

relaying said recovered reverse link information to a control entity if recovering of a received reverse link information from serving sector failed.

5. A method for managing imbalance in a wireless communication system communication system, comprising:

recovering and measuring a non-serving sector reverse link quality metric in at least one non-serving sector based on received and recovered reverse link information;

declaring an imbalance when a serving sector reverse link quality metric measured at a serving sector is less than a non-serving sector reverse link quality metric measured in said at least one non-serving sector; and

mitigating said imbalance at a controller between quality metrics of forward and reverse links in a serving sector utilizing said non-serving sector reverse link quality metric determined from said reverse link information received and recovered over a reverse link at said at least one non-serving sector.

6. The method as claimed in claim 5, wherein said recovering and measuring reverse link quality metric at each sector comprises:

measuring reverse link quality metric at each sector in remote station'"'"'s active set.

7. The method as claimed in claim 6, wherein said mitigating said imbalance comprises:

instructing the subscriber station to remove said serving sector from the subscriber station'"'"'s active set.

8. The method as claimed in claim 7, wherein said causing the subscriber station to increase reverse link power comprises:

determining quality metric resulting in a desired increase of a set point.

9. The method as claimed in claim 7, wherein said causing the subscriber station to increase reverse link power comprises:

determining the outer loop set point in accordance with only the quality metric from the serving sector.

10. The method as claimed in claim 5, wherein said mitigating said imbalance comprises:

causing the subscriber station to increase reverse link power.

11. An apparatus for managing imbalance in a wireless communication system communication system, comprising:

means for receiving reverse link information in at least one non-serving sector to form a non-serving sector reverse link quality metric for comparison with a serving sector reverse link quality metric; and

means for recovering said received reverse link information and mitigating imbalance between quality metrics of forward and reverse links in a serving sector utilizing said non-serving sector reverse link quality metric determined from said reverse link information received and recovered over a reverse link at said at least one non-serving sector.

12. The apparatus as claimed in claim 11 wherein said means for mitigating imbalance utilizing said received reverse link information comprises:

means for relaying said recovered reverse link information to a control entity.

13. The apparatus as claimed in claim 11 wherein said mitigating imbalance utilizing said received reverse link information, comprises:

means for relaying indication of successful recovering to a control entity.

14. The apparatus as claimed in claim 13 further comprising:

means for relaying said recovered reverse link information to a control entity if recovering of a received reverse link information from serving sector failed.

15. An apparatus for managing imbalance in a wireless communication system, comprising:

means for recovering and measuring a non-serving sector reverse link quality metric in at least one non-serving sector based on received and recovered reverse link information;

means for declaring an imbalance when a serving sector reverse link quality metric measured at a serving sector is less than a non-serving sector reverse link quality metric measured in said at least one non-serving sector; and

means for mitigating said imbalance between quality metrics of forward and reverse links in a serving sector utilizing said non-serving sector reverse link quality metric determined from said reverse link information received and recovered over a reverse link at said at least one non-serving sector.

16. The apparatus as claimed in claim 15, wherein said means for recovering and measuring reverse link quality metric at each sector comprises:

means for measuring reverse link quality metric at each sector in remote station'"'"'s active set.

17. The apparatus as claimed in claim 16, wherein said means for mitigating said imbalance comprises:

means for instructing the subscriber station to remove said serving sector from the subscriber station'"'"'s active set.

18. The apparatus as claimed in claim 15, wherein said means for mitigating said imbalance comprises:

means for causing the subscriber station to increase reverse link power.

19. The apparatus as claimed in claim 18, wherein said means for causing the subscriber station to increase reverse link power comprises:

means for determining quality metric resulting in a desired increase of a set point.

20. The apparatus as claimed in claim 18, wherein means for causing the subscriber station to increase reverse link power comprises:

means for determining the outer loop set point in accordance with only the quality metric from the serving sector.

21. A processor-readable medium stored a set of processor-readable instructions, the instructions executed by a processor comprising the steps of:

receiving and recovering reverse link information in at least one non-serving sector to form a non-serving sector reverse link quality metric for comparison with a serving sector reverse link quality metric; and

mitigating imbalance at a controller between quality metrics of forward and reverse links in a serving sector utilizing said non-serving sector reverse link quality metric determined from said reverse link information received and recovered over a reverse link at said at least one non-serving sector.

22. The processor-readable medium of claim 21 further comprising instructions for:

relaying said recovered reverse link information to a control entity.

23. The processor-readable medium of claim 21 wherein said mitigating imbalance utilizing said received reverse link information comprises:

relaying indication of successful recovering to a control entity.