METHOD AND APPARATUS FOR TRANSMIT POWER CONTROL IN WIRELESS NETWORKS

• US 20110167291A1
• Filed: 09/03/2008
• Published: 07/07/2011
• Est. Priority Date: 09/03/2008
• Status: Active Grant

• Current Assignee: InterDigital CE Patent Holdings SAS (InterDigital, Inc.)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Mathur, Saurabh, Perumanam, Ramkumar, Mandrekar, Ishan, Wu, Mingquan, Liu, Hang
• Granted Patent: US 9,215,666 B2
• Time in Patent Office: Days
• US Class Current: 713/340
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/245 taking into account received signal strength

Abstract

A method and apparatus are described including receiving, by a transmitter, a report from an associated client, setting and using a downlink transmit power level responsive to the report for data transmissions to the associated client, determining a downlink data loss rate and adjusting the downlink transmit power level responsive to the downlink data loss rate, wherein said report includes received signal strength, client transmit power level and one of link margin and receiver sensitivity. Also described are a method and apparatus including receiving, by a receiver, a request for a report, transmitting the requested report, receiving an instruction to use an uplink transmit power level, setting and using the uplink transmit power level, determining an uplink data loss rate and adjusting the uplink transmit power level responsive to the uplink data loss rate, wherein said report includes said received signal strength, client transmit power level and one of said link margin and said receiver sensitivity.

Claims

1. A method, said method comprising:

receiving, by transmitter, a report from an associated client;

setting and using a downlink transmit power level responsive to said report for data transmissions to said associated client;

determining a downlink data loss rate; and

adjusting said downlink transmit power level responsive to said downlink data loss rate, wherein said report includes received signal strength, client transmit power level and one of link margin and receiver sensitivity.

3. The method according to claim 1, further comprising calculating a downlink margin responsive to said receiver sensitivity.

4. The method according to claim 1, wherein said downlink data loss rate determination further comprises:

transmitting data to said associated client; and

recording status of said data transmission.

5. The method according to claim 4, further comprising using a data loss measurement window to maintain status of most recent data transmissions.

2. (canceled)

6. A method, said method comprising:

receiving, by a receiver, a request for a report;

transmitting the requested report;

receiving an instruction to use an uplink transmit power level;

setting and using said uplink transmit power level;

determining an uplink data loss rate; and

adjusting said uplink transmit power level responsive to said uplink data loss rate, wherein said report includes said received signal strength, client transmit power level and one of said link margin and said receiver sensitivity.

7. The method according to claim 6, further comprising;

measuring received signal strength; and

determining one of a link margin and receiver sensitivity.

9. The method according to claim 6, wherein said uplink data loss rate determination further comprises:

transmitting data to an access point; and

recording status of said data transmission.

10. The method according to claim 9, further comprising using a data loss measurement window to maintain status of most recent data transmissions.

8. (canceled)

11. An apparatus, comprising:

means for receiving, by a transmitter, a report from an associated client;

means for setting and using a downlink transmit power level responsive to said report for data transmissions to said associated client;

means for determining a downlink data loss rate; and

means for adjusting said downlink transmit power level responsive to said downlink data loss rate, wherein said report includes received signal strength, client transmit power level and one of link margin and receiver sensitivity.

13. The apparatus according to claim 11, further comprising means for calculating a downlink margin responsive to said receiver sensitivity.

14. The apparatus according to claim 11, wherein said downlink data loss rate determination means further comprises:

means for transmitting data to said associated client; and

means for recording status of said data transmission.

15. The apparatus according to claim 14, further comprising means for using a data loss measurement window to maintain status of most recent data transmissions.

12. (canceled)

16. An apparatus, comprising:

means for receiving a request for a report;

means for transmitting said report;

means for receiving an instruction to use an uplink transmit power level;

means for setting and using said uplink transmit power level;

means for determining an uplink data loss rate;

means for comparing said uplink data loss rate to a threshold; and

means for adjusting said uplink transmit power level responsive to said comparison, wherein said report includes said received signal strength, client transmit power level and one of said link margin and said receiver sensitivity.

17. The apparatus according to claim 16, further comprising;

means for measuring received signal strength; and

means for determining one of a link margin and receiver sensitivity.

19. The apparatus according to claim 16, wherein said uplink data loss rate determination means further comprises:

means for transmitting data to an access point; and

means for recording status of said data transmission.

20. The apparatus according to claim 19, further comprising means for using a data loss measurement window to maintain status of most recent data transmissions.

18. (canceled)