Methods and apparatus for enhanced coexistence algorithms in wireless systems

A wireless device, comprising:

• a processing apparatus;
• at least two differing wireless network interfaces that operate in at least a partially overlapping frequency band;
• and
• a computer readable apparatus having a storage medium with at least one computer program stored thereon, the at least one computer program comprising a plurality of computer executable instructions that are configured to, when executed by the processing apparatus:
• determine whether one of the at least two wireless network interfaces has a receiver signal strength index (RSSI) that exceeds a first criterion;
• when the first criterion is exceeded, read a first frequency utilization map for the one of the at least two wireless network interfaces, otherwise read a second frequency utilization map for the one of the at least two wireless network interfaces;
• determine whether the wireless device is in an environment in which a first threshold for a system noise floor is exceeded;
• when the first threshold is exceeded, adjust a transmit power for at least one of the at least two differing wireless network interfaces;
• when the transmit power is adjusted, determine whether the wireless device is in an environment in which a second threshold for the system noise floor is exceeded;
• and
• when the second threshold is exceeded, modify the operation of the at least one of the at least two differing wireless network interfaces.

A method for reducing interference in a wireless coexistence system, the wireless coexistence system including at least two differing wireless network interfaces that operate in at least a partially overlapping frequency band, the method comprising:

• determining a receiver signal strength index (RSSI) at the wireless coexistence system;
• determining a noise floor associated with the wireless coexistences system;
• and
• implementing a coexistence algorithm to reduce interference in the wireless coexistence system based at least in part on the determined RSSI and determined noise floor;
• wherein the at least two wireless interfaces comprise a Wireless Local Area Network (WLAN) interface and a Bluetooth interface, and the act of implementing a coexistence algorithm comprises adjusting a channel map associated with an adaptive frequency hopping function of the Bluetooth interface.

A method of operating a device having first and second air interfaces so as to mitigate interference therebetween without imposing time-sharing restrictions on either of the interfaces, the method comprising:

• determining a received signal strength using at least one of the interfaces;
• determining a noise parameter using at least one of the interfaces;
• and
• based at least on the acts of determining, selectively implementing a frequency use mapping for the first interface that substantially avoids one or more emitted sidebands associated with transmission from the second interface;
• wherein the first interface comprises a Personal Area Network (PAN) interface, the second interface comprises a Wireless Local Area Network (WLAN) interface, and the frequency use mapping comprises a mapping which allows only certain prescribed channels.