Modulation coding scheme selection for response frames in case of transmit power imbalance

Patent metadata

Field	Value
Publication number	US-9288009-B2
Application number	US-201313936994-A
Country	US
Kind code	B2
Filing date	Jul 8, 2013
Priority date	Jul 9, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Certain aspects of the present disclosure relate to a technique for selecting modulation coding schemes (MCS). In some aspects, the MCS is selected based on a characteristic of an electronic device and the MCS of a transmitter. In some aspects, the MCS is selected based on a power imbalance between an access point and a user terminal.

First claim

The invention claimed is:

1. A method for communicating in a wireless network by an electronic device, the method comprising:
receiving data identifying a first modulation coding scheme from a transmitter; and
selecting a second modulation coding scheme based on a characteristic of the electronic device including the first modulation coding scheme, wherein information identifying the second modulation coding scheme is a predetermined numerical N quantity lower than the first modulation coding scheme, the second modulation coding scheme being a function of a power imbalance between the transmitter and the electronic device independent of actual transmit powers of the transmitter and the electronic device; and
transmitting data identifying the second modulation coding scheme.

2. The method of claim 1 , wherein the electronic device receives the predetermined numerical N quantity from the transmitter.

3. The method of claim 2 , wherein the electronic device receives the predetermined numerical N quantity in an association request frame.

4. The method of claim 2 , wherein the electronic device receives the predetermined numerical N quantity in a management frame sent after association.

5. The method of claim 1 , wherein the electronic device provides the predetermined numerical N quantity.

6. The method of claim 1 , wherein the second modulation coding scheme does not exceed a predetermined numerical X quantity.

7. The method of claim 6 wherein the predetermined numerical X quantity is a datarate or modulation code scheme order.

8. The method of claim 1 further comprising receiving data identifying a set of allowable modulation coding schemes.

9. The method of claim 8 , wherein the set of allowable modulation coding schemes is based on a determined transmit power imbalance.

10. The method of claim 1 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is functioning in the wireless network as an Access Point or a User Terminal.

11. The method of claim 1 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is communicating in the wireless network as a User Terminal to an Access Point or a User Terminal to another User Terminal.

12. An apparatus for communicating in a wireless network by an electronic device comprising:
a transceiver configured to receive data identifying a first modulation coding scheme;
a processing system configured to select a second modulation coding scheme based on a characteristic of the electronic device including the first modulation coding scheme, wherein information identifying the second modulation coding scheme is a predetermined numerical N quantity lower than the first modulation coding scheme, the second modulation coding scheme being a function of a power imbalance between the transmitter and the electronic device independent of actual transmit powers of the transmitter and the electronic device; and
wherein the transceiver is configured to transmit and/or receive data identifying the second modulation coding scheme.

13. The apparatus of claim 12 , wherein the electronic device is configured to receive the predetermined numerical N quantity from the transceiver.

14. The apparatus of claim 13 , wherein the electronic device is configured to receive the predetermined numerical N quantity in an association request frame.

15. The apparatus of claim 13 , wherein the electronic device is configured to receive the predetermined numerical N quantity in a management frame sent after association.

16. The apparatus of claim 12 , wherein the electronic device is configured to provide the predetermined numerical N quantity.

17. The apparatus of claim 12 , wherein the second modulation coding scheme does not exceed a predetermined numerical X quantity.

18. The apparatus of claim 17 , wherein the predetermined numerical X quantity is a datarate or modulation code scheme order.

19. The apparatus of claim 12 , wherein the transceiver is configured to receive data identifying a set of allowable modulation coding schemes.

20. The apparatus of claim 19 , wherein the set of allowable modulation coding schemes is based on a determined transmit power imbalance.

21. The apparatus of claim 12 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is functioning in the wireless network as an Access Point or a User Terminal.

22. The apparatus of claim 12 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is communicating in the wireless network as a User Terminal to an Access Point or a User Terminal to another User Terminal.

23. An apparatus for communicating in a wireless network by an electronic device, comprising:
means for receiving data identifying a first modulation coding scheme from a transmitter;
means for selecting a second modulation coding scheme based on a characteristic of the electronic device including the first modulation coding scheme, wherein information identifying the second modulation coding is a predetermined numerical N quantity lower than the first modulation coding scheme, the second modulation coding scheme being a function of a power imbalance between the transmitter and the electronic device independent of actual transmit powers of the transmitter and the electronic device; and
means for communicating using the second modulation coding scheme.

24. The apparatus of claim 23 , wherein the electronic device receives the predetermined numerical N quantity from the transmitter.

25. The apparatus of claim 24 , wherein the electronic device receives the predetermined numerical N quantity in an association request frame.

26. The apparatus of claim 24 , wherein the electronic device receives the predetermined numerical N quantity in a management frame sent after association.

27. The apparatus of claim 23 , wherein the electronic device provides the predetermined numerical N quantity.

28. The apparatus of claim 23 wherein the second modulation coding scheme does not exceed the predetermined numerical N quantity.

29. The apparatus of claim 23 wherein the predetermined numerical N quantity is a datarate or modulation code scheme order.

30. The apparatus of claim 23 further comprising means for receiving data identifying a set of allowable modulation coding schemes.

31. The apparatus of claim 30 , wherein the set of allowable modulation coding schemes is based on a determined transmit power imbalance.

32. The apparatus of claim 23 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is functioning in the wireless network as an Access Point or a User Terminal.

33. The apparatus of claim 23 , wherein the characteristic of the electronic device is further including a type of the electronic device, the type is based on whether the electronic device is communicating in the wireless network as a User Terminal to an Acces

Assignees

• Qualcomm Inc

Inventors

• Merlin Simone
• Jafarian Amin

Classifications

• H04L1/0015 Primary

  characterised by the adaptation strategy · CPC title

• H04L1/0034

  where the transmitter decides based on inferences, e.g. use of implicit signalling · CPC title