<FONT face=Verdana>Geographic routing has been widely hailed owning to its efficiency and scalability

and it is one of research hotspots for routing algorithms of Mobile Ad Hoc Network. Since node energy in such network is limited and cannot be supplemented easily in many cases

balancing energy consumption is one of the most important method to prolong network lifetime. To solve the problem of the energy-consumption imbalance of greedy routing and perimeter routing

we present an Energy-Aware and Beaconless Geographic Routing (EBGR). It operates in two strategies: contend-based greedy-forwarding strategy and void handling strategy. In the conten-based greedy-forwarding strategy

nodes forward data packets by competition. When receiving a data packet from upstream node

intermediate nodes within its forwarding area contend to relay it by waiting for a dynamic forwarding delay (obtained by energy and location information and called DFD). The intermediate node with minimum DFD transmits the data packet first and other nodes cancel their scheduled transmission for the same data packet by overhearing its packet forwarding. When there are no neighbor nodes in the forwarding area

a void handling strategy is employed. Applying angle progress and energy information to DFD

we can allow data packet to traverse the void and to balance energy consumption. Finally

simulation results show that EBGR exhibits 2%-4% packet delivery ratio higher and 10%-20% network lifetime longer than BLR and GEAR.