A system for conserving energy in a multi-node network (110) includes nodes (205) configured to organize themselves into tiers (305, 310, 315). The nodes (205) are further configured to produce a transmit/receive schedule at a first tier (310) in the network (110) and control the powering-on and powering-off...http://www.google.de/patents/US7020501?utm_source=gb-gplus-sharePatent US7020501 - Energy efficient forwarding in ad-hoc wireless networks
