Distributed coexistence system for interference mitigation in a single chip radio or multi-radio communication device

A method of distributed coexistence between a plurality of aggressor and victim radios, said method comprising the steps of:

• receiving receiver (RX) information at an aggressor radio from one or more victim radios;
• comparing a root clock frequency of said aggressor radio to RX information received from said one or more victim radios;
• and
• if said root clock frequency interferes with a victim radio then configuring said aggressor radio with a new root clock frequency that does not interference with said one or more victim radios.

A distributed coexistence system incorporating aggressor and victim radios, comprising:

• a notification unit in each victim radio operative to generate victim messages incorporating receive (RX) information;
• a coexistence bus coupled to said aggressor and victim radios, said coexistence bus operative to communicate victim messages from victim radios to aggressor radios;
• and
• a coexistence control unit associated with each aggressor radio, each coexistence control unit operative to configure a root clock frequency selected so as not to interfere with the frequency band of victim radios.

An apparatus for distributed coexistence between a plurality of radios including aggressor and victim radios, comprising:

• a coexistence bus coupled to said plurality of radios, said coexistence bus operative to provide communications between said plurality of radios;
• a coexistence control unit associated with each radio, each coexistence control unit operative to:
• transmit victim messages incorporating receive (RX) information to other radios over said coexistence bus;
• receive victim messages incorporating receive (RX) information from other radios over said coexistence bus;
• first determine the frequency spurs and harmonics potentially generated from a current root clock frequency;
• second determine whether said frequency spurs and harmonics potentially interfere with the frequency band of other radios;
• and
• if potential interference is detected, select a new root clock frequency so as to avoid interference with other radios.

A multi-radio device, comprising:

• a plurality of co-located radios;
• a plurality of coexistence control units, each coexistence control unit associated with a respective radio;
• a coexistence bus coupled to said plurality of radios, said coexistence bus operative to provide communications between said plurality of coexistence control units;
• each coexistence unit operative to:
• transmit victim messages incorporating receive (RX) information to other radios over said coexistence bus;
• receive victim messages incorporating receive (RX) information from other radios over said coexistence bus;
• first determine the frequency spurs and harmonics potentially generated from a current root clock frequency;
• second determine whether said frequency spurs and harmonics potentially interfere with the frequency band of other radios;
• and
• if potential interference is detected, select a new root clock frequency so as to avoid interference with other radios.