The present invention facilitates cluster formation within a communications network by utilizing network topology information to designate network nodes that are crucial for relaying traffic as cluster head nodes, while remaining network nodes are designated as member nodes. A beacon packet transmission...http://www.google.de/patents/US6980537?utm_source=gb-gplus-sharePatent US6980537 - Method and apparatus for communication network cluster formation and transmission of node link status messages with reduced protocol overhead traffic