WLAN SYSTEMS HAVING REDUCED POWER CONSUMPTION BY DYNAMIC SETTING AND RELATED METHODS THEREOF

• US 20080165715A1
• Filed: 01/09/2007
• Published: 07/10/2008
• Est. Priority Date: 01/09/2007
• Status: Abandoned Application

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Liu, Tai-Cheng
• Application Number:
  US11/621,120
• Publication Number:
  US 20080165715A1
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0261 managing power supply demand, e.g. depending on battery level
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A WLAN system is disclosed. The system includes: an Analog Front-End (AFE) circuit, for converting between analog baseband data and digital baseband data; a Radio Frequency (RF) circuit, coupled to the AFE circuit, for converting between analog RF data and analog baseband data; and a baseband circuit, coupled to the AFE circuit, for processing the digital baseband data and dynamically setting at least a parameter of the WLAN system based on the content of the data, in order to control the power consumption level of the WLAN system.

Claims

1. A WLAN system, comprising:

an Analog Front-End (AFE) circuit, for converting digital baseband data into analog baseband data or converting analog baseband data into digital baseband data;

a Radio Frequency (RF) circuit, coupled to the AFE circuit, for converting the analog baseband data into an RF signal and transmitting the RF signal, or receiving and converting a received RF signal into the analog baseband data; and

a baseband circuit, coupled to the AFE circuit, for processing the digital baseband data and dynamically setting parameters of the AFE circuit, the RF circuit, or both the AFE and RF circuits to adjust a power consumption level according to a content of the digital baseband data.

2. The WLAN system of claim 1, wherein the RF circuit, the AFE circuit, and the baseband circuit are integrated on the same chip.

3. The WLAN system of claim 1, wherein the baseband circuit comprises

a Media Access Control (MAC) circuit for dynamically setting parameters of the AFE circuit, RF circuit, or both AFE and RF circuits to adjust the power consumption level of the WLAN system.

4. The WLAN system of claim 1, wherein the MAC circuit dynamically sets parameters of the RF circuit and the AFE circuit to reduce the power consumption level when no data packets are being transmitted or received, and dynamically sets parameters of the RF circuit and the AFE circuit to increase the power consumption level when data packets are being transmitted or received.

5. The WLAN system of claim 1, wherein the parameters of the RF circuit, AFE circuit, or both the RF and AFE circuits are set to reduce the power consumption level when the WLAN system is transmitting data modulated using a BPSK modulation scheme, and the parameters are set to consume more power when transmitting data modulated using a modulation scheme with a higher rate.

6. The WLAN system of claim 1, wherein the baseband circuit adjusts the parameters in increments.

7. The WLAN system of claim 1, wherein the parameters of the AFE circuit, RF circuit, or both the AFE and RF circuits are set to adjust the power consumption level based on a required SNR level.

8. The WLAN system of claim 1, wherein the content of the digital baseband data comprises an indication of a transmission rate, modulation type, or packet type.

9. The WLAN system of claim 1, wherein the content of the digital baseband data is utilized to set parameters of a pre-amplifier, a mixer, or both the pre-amplifier and mixer in a transmission mode.

10. The WLAN system of claim 1, wherein the content of the digital baseband data is utilized to set parameters of a low noise amplifier (LNA), mixer, synthesizer, or a combination of the LNA, mixer and synthesizer in a receiving mode.

11. The WLAN system of claim 1, wherein the baseband circuit dynamically sets the parameters of the AFE circuit, the RF circuit, or both the AFE and RF circuits to reduce the power consumption level after the digital baseband data has been demodulated.

12. The WLAN system of claim 1, wherein the parameters are dynamically set to reduce the power consumption level when the preamble is received.

13. A method of transmitting data packets over a WLAN network comprising:

dynamically setting at least a transmitting parameter to adjust a power consumption level for transmission;

converting digital baseband data packets into analog baseband data;

converting the analog baseband data into analog RF data; and

transmitting the analog RF data.

14. The method of claim 13 wherein the step of dynamically setting the transmitting parameter comprises:

dynamically setting the transmitting parameters to reduce the power consumption level when no data packets are being transmitted and dynamically setting the transmitting parameter to increase the power consumption level when data packets are being transmitted.

15. The method of claim 13 wherein the transmitting parameter is set to reduce the power consumption level when the WLAN system is transmitting data modulated using a BPSK modulation scheme, and the transmitting parameter is set to consume more power when transmitting data modulated using a modulation scheme with a higher rate.

16. The method of claim 13 wherein the step of dynamically setting the transmitting parameters comprise adjusting the power consumption level in increments.

17. A method for receiving data packets over a WLAN network, the method comprising:

receiving an analog RF data;

dynamically setting the receiving parameters to adjust a power consumption level of signal reception;

converting the analog RF data to analog baseband data; and

converting the analog baseband data to digital baseband data.

18. The method of claim 17 wherein the step of dynamically setting the receiving parameters comprises:

dynamically setting the receiving parameter to reduce the power consumption level when listening to a beacon or before data packets are being detected, and dynamically setting the receiving parameters to increase the power consumption level when data packets are being detected or received.

19. The method of claim 17, wherein the receiving parameter is set to reduce the power consumption level when receiving a preamble, and the receiving parameters are set to consume more power when receiving the data modulating by a high-rate modulation scheme.

20. The method of claim 17, wherein the step of receiving the analog RF data comprises:

receiving a Channel Clear Assignment (CCA) signal for indicating an analog RF data will be received.