Method and circuit for reducing power consumption of a wireless local network

A 802.11g station, wirelessly coupled to an access point of a wireless local area network, wherein there are an IEEE 802.11b and an IEEE 802.11g standards suitable for the wireless local area network, and the wireless local area network includes a 802.11b station communicating according to the IEEE 802.11b standard, the 802.11g station comprising:

• a DSSS baseband transceiver, for communicating packets of the 802.11g station according to the IEEE 802.11b standard;
• an OFDM baseband transceiver, for communicating packets of the 802.11g station according to the IEEE 802.11g standard;
• and
• a control module, coupled to the DSSS and OFDM baseband transceivers, for storing a communication mode representing whether the 802.11g station communicates according to the IEEE 802.11b or the IEEE 802.11g standards, disabling the OFDM baseband transceiver of the 802.11g station if the communication mode is the IEEE 802.11b standard, controlling the DSSS baseband transceiver to modulate a plurality of first packets according to the IEEE 802.11b standard before the plurality of first packets is delivered, controlling the DSSS baseband transceiver to demodulate a plurality of second packets according to the IEEE 802.11b standard after the plurality of second packets is received, and restrains the 802.11g station from sending a CTS to self command to the 802.11b station before communicating with the access point to save network communication bandwidth if the access point is an 802.11g access point.

A wireless network, wherein there are an IEEE 802.11b and an IEEE 802.11g standards suitable for the wireless network, the wireless network comprising:

• an access point;
• a 802.11b station, communicating according to the IEEE 802.11b standard;
• and
• a 802.11g station, communicating according to the IEEE 802.11g standard, having a DSSS baseband transceiver and an OFDM baseband transceiver for respectively communicating packets according to the IEEE 802.11b and the IEEE 802.11g standards, restraining itself from sending a CTS to self command to the 802.11b station before communicating with the access point to save network communication bandwidth if the access point is an 802.11g access point, wherein the 802.11g station stores a communication mode representing whether the 802.11g station communicates according to the IEEE 802.11b or the IEEE 802.11g standards, disables the OFDM baseband transceiver of the 802.11g station if the communication mode is the IEEE 802.11b standard, modulates a plurality of first packets of the 802.11g station with the DSSS baseband transceiver according to the IEEE 802.11b standard before the plurality of first packets is delivered by the 802.11g station, and demodulates a plurality of second packets of the 802.11g station with the DSSS baseband transceiver according to the IEEE 802.11b standard after the plurality of second packets is received by the 802.11g station.