Furthermore, the connectionless communication operates ondifferent physical channels (three advertising channels), and cancoexist with connection-based communications (on data channels).On one hand, advertisers and scanners can form a broadcast net-work on advertising channels; on the other hand, the central orperipheral in an existing piconet or scatternet are also able to ad-vertise and scan, resulting in a scatternet that involves both adver-tising and data channels. There could be multiple combinations ofsuch scatternets.