Systems and methods for link adaptation in wireless communication systems

• US 8,611,288 B1
• Filed: 03/03/2010
• Issued: 12/17/2013
• Est. Priority Date: 03/05/2009
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Zhang, Hongyuan, Lou, Hui-Ling, Nabar, Rohit U., Liu, Yong
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): HALIYUR, VENKATESH N
• Application Number:
  US12/716,300
• Time in Patent Office: 1,385 Days
• Field of Search: 370228-352, 455101-132, 375267-347
• US Class Current: 370/329
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001

Abstract

A method includes determining parameters corresponding to a communication channel, transmitting the parameters from a first wireless device to a second wireless device via the communication channel, wherein the parameters include at least one of (i) an estimated quality of the communication channel or (ii) a modulation and coding scheme (MCS) for transmission via the communication channel, receiving the parameters at the second wireless device, and based on at least one of the parameters, selecting a MCS for transmission from the second wireless device to the first wireless device via the communication channel.

Claims

1. A system, comprising:

a first wireless device configured to

(i) determine parameters corresponding to a communication channel, wherein the parameters are associated with an estimated quality of the communication channel,

(ii) determine, based on the parameters, a preferred modulation and coding scheme (MCS) for transmission via the communication channel, and

(iii) transmit the parameters and the preferred MCS via the communication channel; and

a second wireless device configured to

(i) receive the parameters and the preferred MCS determined by the first wireless device via the communication channel, and

(ii) based on the preferred MCS determined by the first wireless device, select an MCS for transmission of data to the first wireless device via the communication channel,

wherein the MCS selected by the second wireless device includes multiple bits indicating (i) one of SC modulation and OFDM modulation and (ii) one of a plurality of data rates.

2. The system of claim 1, wherein the second wireless device, based on at least one of the preferred MCS determined by the first wireless device and the parameters, selects a power level for transmission of data to the first wireless device via the communication channel.

3. The system of claim 1, wherein the communication channel includes a radio frequency (RF) spectrum ranging from 57 gigahertz (GHz) to 64 GHz.

4. The system of claim 1, wherein the MCS selected by the second wireless device includes at least one of a modulation scheme or a data rate.

5. The system of claim 4, wherein the modulation scheme includes single carrier (SC) modulation or orthogonal frequency-division multiplexing (OFDM) modulation.

6. The system of claim 1, wherein the estimated quality of the communication channel includes one of a signal-to-noise ratio (SNR) or a receiver signal strength index (RSSI).

7. The system of claim 1, wherein the MCS selected by the second wireless device includes one bit indicating SC modulation or OFDM modulation.

8. The system of claim 1, wherein the first wireless device determines and transmits the parameters and the preferred MCS during a beamforming operation initiated by the second wireless device.

9. The system of claim 1, wherein the first wireless device determines and transmits the parameters and the preferred MCS during a beam tracking operation initiated by the second wireless device.

10. A method, comprising:

using a first wireless device,

determining parameters corresponding to a communication channel, wherein the parameters are associated with an estimated quality of the communication channel,

determining, based on the parameters, a preferred modulation and coding scheme (MCS) for transmission via the communication channel, and

transmitting the parameters and the preferred MCS via the communication channel; and

using a second wireless device,

receiving the parameters and the preferred MCS determined by the first wireless device, and

based on the preferred MCS determined by the first wireless device, selecting an MCS for transmission of data from the second wireless device to the first wireless device via the communication channel,

wherein the MCS selected by the second wireless device includes multiple bits indicating (i) one of SC modulation and OFDM modulation and (ii) one of a plurality of data rates.

11. The method of claim 10, further comprising:

based on at least one of the preferred MCS determined by the first wireless device and the parameters, selecting a power level for transmission of data from the second wireless device to the first wireless device via the communication channel.

12. The method of claim 10, wherein the communication channel includes a radio frequency (RF) spectrum ranging from 57 gigahertz (GHz) to 64 GHz.

13. The method of claim 10, wherein the MCS selected by the second wireless device includes at least one of a modulation scheme or a data rate.

14. The method of claim 13, wherein the modulation scheme includes single carrier (SC) modulation or orthogonal frequency-division multiplexing (OFDM) modulation.

15. The method of claim 10, wherein the estimated quality of the communication channel includes one of a signal-to-noise ratio (SNR) or a receiver signal strength index (RSSI).

16. The method of claim 10, wherein the MCS selected by the second wireless device includes one bit indicating SC modulation or OFDM modulation.

17. The method of claim 10, further comprising:

determining and transmitting the parameters and the preferred MCS at the first wireless device during a beamforming operation initiated by the second wireless device.

18. The method of claim 10, further comprising:

determining and transmitting the parameters and the preferred MCS at the first wireless device during a beam tracking operation initiated by the second wireless device.